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Date submitted2012-09-28
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Date accepted2012-11-28
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Date published2013-03-01
Academician N.S.Kurnakov: his life and work
- Authors:
- D. E. Chirkst
The information about life time of famous chemist and metallurgist N.S.Kurnakov and the capsule review of his scientific achievementsis represented in this paper. The formation of chemical and metallurgical scientific school in Saint Petersburg Mining Institute is shown.
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Date submitted2012-09-26
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Date accepted2012-11-07
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Date published2013-03-01
The role of calcium oxide in the thermochemical conditioning of bauxite
- Authors:
- V. M. Sizyakov
- O. A. Dubovikov
- N. V. Nikolaeva
It is well known that lime is an effective additive which allows to increase the depth and speed of the extraction of alumina from bauxite by the Bayer process. The firing is one of the operations in thermochemical conditioning of bauxite, it is rational to enter directly on the lime-stone at firing of bauxite, eliminating the special operation of firing limestone and calcined material damping. In order to test this were carried out research on the firing of bauxite in the presence of calcium oxide, subsequent desiliconization of calcined bauxite and autoclave leaching bauxite concentrate.
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Date submitted2012-09-12
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Date accepted2012-11-12
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Date published2013-03-01
Regeneration of reversible alkaline solutions at chemical conditioning of bauxite
In Russia and some other countries proposed various ways to the chemical enrichment of bauxite, which usually does not affect the question of regeneration of an alkaline solution of silica, or reduce it to the release of silica in the form of calcium silicate. While the technological circuits of the chemical enrichment of the return should include an alkaline solution, after regeneration, the following parties desiliconization bauxite. It is known that the chemical enrichment is accompanied by a secondary process – the formation of hydroaluminosilicates sodium, the rate of which depends on the concentration in the alkaline solution as aluminum oxide and silicon dioxide. This paper presents data a two-stage osazhdniya silica from an alkaline solution. In the first stage in the form of sodium hydro-aluminosilicates and second in the form of calcium silicate.
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Date submitted2012-09-12
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Date accepted2012-11-07
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Date published2013-03-01
Intensification of carbon aluminates technology of superdeep desilication on the basis of the catalytic properties of the hydro granate sludge
- Authors:
- V. M. Sizyakov
- E. S. Kononenko
- A. I. Snegurova
The results of laboratory studies on super deep desilication of alumina liquors based on hidrocarboalyuminat calcium supplements 4CaO×Al2O3×0,5CO2×11H2O in advance of entering into the process of working hydrogranat sludge. Obtained qualitatively new alumina liquors with a silicon module (weight ratio Al2O3/SiO2) of 50 000 units. Impact of type-ahead hydrogranat sludge to a desilication depth given from the viewpoint of heterogeneous catalysis.
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Date submitted2012-09-24
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Date accepted2012-11-30
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Date published2013-03-01
Technology super deep desiliconization with fractional dose hydrocarboaluminate of calcium
- Authors:
- V. M. Sizyakov
- E. S. Kononenko
- S. N. Makarov
The result of industrial tests of the technology super deep desiliconization of alumina liquors with fractional dose hydrocarboaluminate of calcium 4CaO×Al2O3×0,5CO2×11H2O. Due to this technology solution alumina liquors with higher silicon module (relative weight Al2O3/SiO2) without increasing lime carbonate expenditure.
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Date submitted2012-09-25
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Date accepted2012-11-09
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Date published2013-03-01
Thermodynamic analysis of aluminium hydroxide calcination at alumina production
- Authors:
- V. M. Sizyakov
- L. A. Voropanova
The thermodynamic analysis of aluminium hydroxide dehydration during calcination process at alumina production is carried out. The calcination of aluminium hydroxide is possible at ordinary pressure and temperature value more than 600 K. Diaspor dehydration process is possible by way of freezeout of water as an ice, water rendering or heating till decomposition temperature.
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Date submitted2012-09-20
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Date accepted2012-11-14
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Date published2013-03-01
Modern questions of the metallurgical processing red mud
- Authors:
- V. A. Utkov
- V. M. Sizyakov
Are considered the advantages and disadvantages of complex processing red mud to produce alumina, iron (cast iron) and cement on the area of alumina refineries and way of getting on them only transportable red mud – for shipping and recycling of new marketable products at operating enterprises.
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Date submitted2012-09-26
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Date accepted2012-11-13
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Date published2013-03-01
Hydrochemical processing of red sludge «Aluminium of Kazakhstan» JSC
The impact of operating conditions of red sludge autoclave leaching with high-modulus alkali-aluminate solutions such as duration, temperature, limestone dosing rate, caustic alkali concentration, and pulp liquid-to-solid ratio on extraction of valuable components: alumina and alkali has been explored. The behavior of hydrogarnet sludge during thickening, washing and filtration has been checked under laboratory conditions. Researches were held and optimum parameters of solutions’ caustic module conversion have been chosen. The optimum alternative of process chart of hydrochemical branch as applied to red sludge processing at «Aluminium of Kazakhstan» JSC has been chosen.
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Date submitted2012-09-11
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Date accepted2012-11-23
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Date published2013-03-01
The role of mineralized additivies in the alumina phase transformation process
The statistical analysis has allowed to reveal the additives essentially influencing process of formation of corundum. So, fluoric connections of sodium, calcium, aluminum, oxide of iron and chrome promote formation. Opposite influence is rendered oxide of sodium, by connections of lithium and a dioxide of the titan. Besides, influence of a dioxide of the titan and oxide of chrome is estimated.
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Date submitted2012-09-04
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Date accepted2012-11-13
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Date published2013-03-01
Study of the separation process dispersed nonuniform systems for conditioning bauxite
- Authors:
- V. M. Sizyakov
- O. A. Dubovikov
- N. V. Nikolaeva
The possibility of thickening and filtration for separation of heterogeneous disperse systems formed during the chemical conditioning of bauxite was investigated. It is shown that with increasing the ratio between liquid and solid phases of bauxite pulp thickening process indicators are improving. A similar influence provides of temperature increase of the process and the use of flocculants. The obtained results are compared with the indicators of condensation of red mud. The filter cloth was chosen for slurry concentrate bauxite, which provides the most rational regime filtration with the accumulation of sediment.
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Date submitted2012-09-19
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Date accepted2012-11-26
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Date published2013-03-01
Prospects of magnesium oxide application in Bayer’s aluminous technology
The question of magnesium oxide application for purification of aluminate liquors of aluminous production is in a complex considered. The two-phasic process is offered for providing of magnesium hydrocarbo- and sulfuraluminates formation by interaction of magnesium oxide with aluminate liquors under conditions, corresponding to parameters of aluminous production. High sorption activity of received compounds is defined with reference to organic substances of aluminate liquors.
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Date submitted2012-09-21
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Date accepted2012-11-02
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Date published2013-03-01
Researches on improvement of gold leaching process by means of mass transfer optimization in gas-liquid reactors
Modern metallurgy pays more attention to chemical processes safety of staff and nature environment. One of the most hazardous branches in metallurgy is gold ores cyanidation. Researches on possibility to avoid cyanide leaching are carrying out during last thirty years. Cyanide competitors are thiosulphate and thiourea solvers. Within international cooperation between National Mineral Resources University and Lappeenranta University of Technology researches are devoted to tiosulphate leaching improvement. Main efforts are forwarded on process chemistry, however mass transfer processes of heterogenic systems are important as well. Therefore their optimization is planned to achieve by means of computer modeling based on particle image velocimetry.
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Date submitted2012-09-18
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Date accepted2012-11-19
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Date published2013-03-01
Investigation of the effect of concentrate oxidation on thiosulfate gold leaching
- Authors:
- D. V. Gradov
- V. M. Sizyakov
- M. Neuvonen
More and more attention is paying to research of feasible cyanide alternative leaching techniques due to increasingly growing concern to Mother Nature. After some serious cyanide accidents some countries have campaigned to ban cyanide in gold mining industry. Political alignments and concern about environmental have been reasons to find good and less-toxic alternatives to cyanide. One of the most promising leach reagents is stated to be thiosulphate because of its benign properties. Moreover it is suitable for sulphide and carbonaceous ores which present a problem for cyanidation. In the present paper number of experiments on research of thiosulphate leaching kinetic study as well as pretreatment of gold concentrate by wet oxidation with following leaching tests is presented.
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Date submitted2012-09-28
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Date accepted2012-11-01
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Date published2013-03-01
Selective activity of some sorbents of organic compounds in aluminate liquors
- Authors:
- E. V. Tikhonova
- E. V. Sizyakova
Sharp selectivity of hydrocarboaluminates of caustic-earth metals and magnesium oxide in relation to the most dangerous classes of the organic substances playing defining role in decrease in extent of decomposition level and deterioration of produced alumina properties– humic, carboxylic acids and high-molecular organic compounds are defined. Soda is good for humic acids sorption (about 40 %) also is inefficient for removal of carboxylic acids and high-molecular compounds. Harmful groups of organic substances generally provide chromaticity of aluminate liquors. The photometric analysis states an objective assessment of the content of the painted organic substances in relation to their initial quantity in aluminates liquors.
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Date submitted2012-09-23
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Date accepted2012-11-09
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Date published2013-03-01
Investigation of the colored organic compounds behavior in aluminate liquors during electrolysis treatment
- Authors:
- Yu. A. Zaitsev
- E. V. Tikhonova
- E. V. Sizyakova
The behavior of impurities – colored organic compounds (COC) in aluminate liquors of Bayer process during electrolysis treatment was investigated. Experimental data for the impact of various technological parameters and conditions are found to reduce the content of COC to 50-80 %.
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Date submitted2012-09-03
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Date accepted2012-11-08
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Date published2013-03-01
Application of high-level calcium carbonate for synthesis products in the system NA2O–AL2O3–CAO–CO2–H2O
The results of synthesis hydrocarboalyuminates of calcium (GKAK) using carbonate reagents of different nature and size distribution. A high activity of the lime sludge from causticising soda and food processing conversion of phosphogypsum, which allows us to recommend them for use in the process of obtaining GKAK. Installed limiting stage of interaction of internal diffusion of the reactants.
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Date submitted2012-09-05
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Date accepted2012-11-15
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Date published2013-03-01
About directions of stabilization grain size metallurgical alumina
The materials physical and chemical analysis of the reasons of instability particle size distribution of productional of aluminum hydroxide in the processing of bauxite by Bayer process. Shown that the frequency of changes in the properties precipitate Al(OH)3, formed during the precipitation of aluminate solutions determined by the dependence of the growth processes on the relative supersaturation of the system per unit area of the seed. Found determines the influence of concentration injected seed aluminum hydroxide and its active surface (which varies under the influence of impurities in the aluminate solution) on the parameters of the periodic changes in the properties of sediment.
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Date submitted2012-09-15
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Date accepted2012-11-20
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Date published2013-03-01
Thermodynamic of lanthanum (iii) and samarium (iii) extraction by using stoichiometric concentration solutions of naphtenic acid
Experimental data on solvent extraction of lanthanum (III) and samarium (III) by solutions of naphthenic acid from nitrate medium was obtained. Dependences of distribution coefficient of pH, concentration of organic and aqueous phase was obtained. thermodynamic characteristics of extraction equilibrium was calculated.
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Date submitted2012-09-30
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Date accepted2012-11-24
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Date published2013-03-01
Thermodynamic of cerium (III) and europium (III) extraction by using stoichiometric concentration solutions of naphtenic acid
Experimental data on solvent extraction of lanthanum (III) and samarium (III) by solutions of naphthenic acid from nitrate medium was obtained. Dependences of distribution coefficient of pH, concentration of organic and aqueous phase was obtained. thermodynamic characteristics of extraction equilibrium was calculated.
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Date submitted2012-09-13
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Date accepted2012-11-02
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Date published2013-03-01
Extraction of cerium lanthanides by using stoichiometric concentration solution of naphtenic acid
Technology of solvent extraction and separation of cerium lanthanides by solutions of naphthenic acid in o-dimethylbenzene was obtained. The sequence of extraction Eu > Sm > Ce > La from nitrate media was calculated.
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Date submitted2012-09-06
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Date accepted2012-11-25
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Date published2013-03-01
Briquetting of iron-ore materials for iron and steel industry
- Authors:
- V. B. Kuskov
- A. V. Kornev
- D. V. Sukhomlinov
Briquetting in ferrous metallurgy is the earliest way clotting. In the beginning of XX century briquetting has been forced out by agglomeration basically for the reason considerably more productivity of process of agglomeration. The alternative agglomeration became pelletizing which share from the XX-th century middle steadily grows that is quite explainable essential increase in manufacture fine particle concentrates. However briquetting has a number of advan- tages. And for separate kinds of iron ores briquetting can appear preferable process. Such ores are the rich iron ores containing 60 and more % iron in ore. The technology of briquetting includes, preliminary screening for removing of large classes; dispensing and preliminary mixing 85-90 % martite, iron-micaceousmartite ores and 10-15 % hydrohematite ores; mixing with connective substances; pressing; drying. The received briquettes have density 3200-3500 kg/m3, durability on compression about 4,5 MPа.
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Date submitted2012-09-20
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Date accepted2012-11-28
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Date published2013-03-01
Complex use of iron ores in iron and steel industry
- Authors:
- V. B. Kuskova
- Ya. V. Kuskova
The most common inorganic pigment is red iron oxide. Production of red iron pigment from Yakovlevskogo ore deposit is promising and will meet the demand for high quality and in-expensive pigment. Designed wasteless flowsheet for separation of iron ore in two qualities – paint grade quality (pigment) and metallurgical grade. The technology includes crushing, fine grinding ore in a ball mill and classification. The metallurgical grade of ore is used for metallurgical manufactures of briquettes.
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Date submitted2012-09-23
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Date accepted2012-11-06
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Date published2013-03-01
New technologies of fine and ultrafine minerals comminution
- Authors:
- V. V. Lvov
This article describes a new advanced technology IsaMill™ (Xstrata Technology, Australia). An innovative, large-scale, energy-saving technology comminution, designed and tested on different metalliferous ores solid.
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Date submitted2012-09-22
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Date accepted2012-11-07
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Date published2013-03-01
The intensification of the separation of minerals using vibrational segregation
- Authors:
- A. O. Romashev
- V. B. Kuskov
- V. V. Lvov
The possibility of using the vibrating segregation in the intensification of separation minerals. The possibility of the use segregation in the separation coal on the concentration tables. Also shows the effective use of segregation for dry non screen classification of loose materials.
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Date submitted2012-09-12
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Date accepted2012-11-15
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Date published2013-03-01
Use of new kinds of disk concentration tables for increase of efficiency of gravity concentration
- Authors:
- V. B. Kuskov
- Ya. V. Kuskova
One of the most effective gravity aggregate is concentrating tables. Concentrating tables are used for tin, tungsten, rare, precious metal ores beneficiation. The new designs of rotating disk concentrating tables are developed. Comparative tests of concentrating shaking table, spiral sluice and of the basic experimental model of a rotating circular table were conducted for concentration of artificial mixtures. The using of round tables can increase recovery and efficiency of separation оf dense particles.
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Date submitted2012-09-25
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Date accepted2012-11-23
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Date published2013-03-01
Features of rich iron ores preparation for metallurgical processing
- Authors:
- V. B. Kuskov
- Ya. V. Kuskova
- A. V. Kornev
Iron ores is one of the main types of minerals used used by mankind. Practically all domestic deposits contain 20-40 % iron ore and so are the deep concentration. Deposits of rich iron ores, containing more than 55-60 % in our country is not enough. One of these fields is Yakovlevskoye iron ore deposit. The use of dry magnetic separation of ore for the preliminary concentration did not give positive results. The study of grain-size composition of the ore showed a significant disparity in the distribution of iron by classes size that afford it possible to carry out preliminary concentration of ore screening. For ore processing flowsheet is proposed which includes crushing to a particle size of 10 mm, screening fraction of 5 mm. Larger fraction of 5 mm is used, for example, in the blast-furnace process, and the fraction smaller than 5 mm is direct to the briquetting. As binding substance for briquetting used solution of carboxymethyl cellulose, or a combination of binder based on carboxymethyl cellulose or highly active clay.
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Date submitted2012-09-28
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Date accepted2012-11-11
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Date published2013-03-01
Causes and significance of inflections in hydrocyclone efficiency curves
- Authors:
- E. E. Andreev
- V. V. Lvov
- A. V. Fadina
Deviations of the shape of hydrocyclone efficiency curves from the ideal S-shape have long been reported, appearing as changes in slope, or inflections. These inflections can be divided into two categories: coarse inflections, which are caused by differences in density of the minerals being separated, and fine inflections, for which there are a number of competing hypotheses concerning their cause. The existing literature addresses either the fine inflection or the coarse inflection, but no papers have reported both types of inflection occurring at once. This paper presents hydrocyclone results from both in-plant studies and laboratory experiments that show both coarse and fine inflections and the industrial significance of both types of inflections are discussed.
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Date submitted2012-09-06
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Date accepted2012-11-15
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Date published2013-03-01
Experience of metal magnetic liners
- Authors:
- E. E. Andreev
- V. V. Lvov
- A. V. Fadina
The choice of liners in the cycles of disintegration is important because the effect on the grinding efficiency, overall cost and quality of the product. A variety of linings in order to increase resistance toabrasion, cutting and efficiency improvements to reduce energy consumption. The specific type of metal magnetic liners has been developed in China and is installed on more than 400 miningcompanies in China. This article describes an example installation metal magnetic liners (MML) in the company for processing iron ore «Cleveland Cliff's Northshore Mining» (USA).
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Date submitted2012-09-04
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Date accepted2012-11-13
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Date published2013-03-01
Saving energy using various media grinding
- Authors:
- E. E. Andreev
- V. V. Lvov
- L. S. Chitalov
Grinding of mineral raw materials of different composition in ball mills, rotary and vertical mill is one of the leading process for disclosure of mineral complexes and preparation of raw material for enrichment. Capital and operating costs for grinding can be up to 70 % of total costs. Reduced total cost of grinding is the most important task in the technology of mineral processing. The main ways of intensifying the grinding process are associated with increased productivity, lower unit costs, improving process flow diagrams and improved process control. At the present time, the reduction of energy consumption in all redistributions concentrator is of paramount importance.
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Date submitted2012-09-03
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Date accepted2012-11-18
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Date published2013-03-01
About possibility of the mass granite crushed stones wastes utilization
- Authors:
- A. V. Alinkin
The technology, which allows to process of granite crushed stones wastes thoroughly, is developed. Technology consists of two lines. The first line is granite crushed stones wastes modification for the purpose to produce of the filling compound for fine concrete. The second line is granite crushed stones wastes conditioning for the purpose to produce of some fractions how end products.
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Date submitted2012-09-30
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Date accepted2012-11-23
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Date published2013-03-01
Production strategy of aluminium reduction pot without anode effect
- Authors:
- V. Yu. Bazhin
- D. V. Makushin
- A. V. Saitov
The problem of increase of energy performances for higher amperage aluminum pots is discussed during magnet dynamic instability at anode effect. The concept of aluminum production without anode effects which is connected with monitoring of key parameters and discrete alumina feeding is offered.
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Date submitted2012-09-24
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Date accepted2012-11-27
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Date published2013-03-01
Heat of fusion and the symmetry of the potential of crystal structure of metals
Simmetry transformation crystalline structure proceeds by symmetry reactions. Unlike the chemical reactions that proceed in the liquids and the gases where ions or atoms move freely symmetry reactions proceed in solid bodies where structural units are set orderly.
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Date submitted2012-09-26
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Date accepted2012-11-09
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Date published2013-03-01
The introduction of the system of energy saving and energy efficiency at the enterprises of metallurgy
- Authors:
- Yu. L. Zhukovskii
- E. V. Sizyakova
In the article the basic principles of energy conservation and efficiency of the enterprises of metallurgy. The analysis of the energy saving potential in the metallurgical complex. We describe the stages of implementation of energy management, energy analysis of the structure of the enterprise.
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Date submitted2012-09-30
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Date accepted2012-11-21
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Date published2013-03-01
Recovery of rhenium in hydrometallurgic processing osmium-containing process-suitable materials of sulphide-copper ores
Incidental concentrating of valuable elements in processing sulphide-copper ores yields supplementary semi-products enriched with osmium, rhenium, and selenium. Peculiar features of processing properties of rhenium, radiogenic osmium, and selenium are shown in this paper, as well as concentrators for rare microelements and ways of their extraction.
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Date submitted2012-09-09
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Date accepted2012-11-20
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Date published2013-03-01
Concentration precious metals in processing slagwastes of sulfide ores
Dump slag dust products of man-made deposits of Norilsk region are a promising source of precious metals. Methods for concentrating precious and base metals in sediment cores of multiponds slag products are studied.
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Date submitted2012-09-15
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Date accepted2012-11-04
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Date published2013-03-01
Oxidative melting of sulfide melts with the formation of low-siliceous slags
- Authors:
- G. V. Konovalov
- T. R. Kosovtseva
The article considers the possibility of autogenous smelting with low siliceous slag in the apparatus with a new way to file a blast in the regime of high-temperature controlled heat transfer.
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Date submitted2012-09-19
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Date accepted2012-11-22
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Date published2013-03-01
Recycling of electronics industry waste with a maximum extraction of precious metals
- Authors:
- A. N. Telyakov
- S. A. Rubis
- T. A. Aleksandrova
In the given work research of material structure of a radio-electronic breakage is conducted. Concentrates with different mineralogical composition selectively obtained. A study on the separate processing of concentrates is conducted in order to enhance extraction of precious metals.
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Date submitted2012-09-17
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Date accepted2012-11-06
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Date published2013-03-01
Using of aluminum fluoride with high bulk density for alumina feeding systems of reduction pots
- Authors:
- A. N. Khrapkova
- V. M. Sizyakov
- V. Yu. Bazhin
The problem of auto-feeding of aluminum fluoride with high bulk density is discussed. The possibility of reducing the specific consumption of aluminum fluoride in relation to the rational choice of physical and chemical characteristics is studied.
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Date submitted2012-09-01
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Date accepted2012-11-24
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Date published2013-03-01
Modeling of batch gold leaching process by cyanidation
A kinetic gold leaching model, based on the well-known shrinking core model, is presented in this work. The model considers the effects of internal diffusion, surface reaction and unreacted amount of gold in the concentrate particle during leaching. The model parameters are estimated by minimization of mismatching between experimental data and results of numerical computation of kinetic model made by using ReactOp software.
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Date submitted2012-09-10
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Date accepted2012-11-09
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Date published2013-03-01
Modelling of thickening process in mineral processing
The present paper is devoted to the research of a spatially one-dimensional model of flocculated suspensions in the clarifier–thickener. This model unites a theory of sedimentation– consolidation processes of flocculated suspensions, which leads to a strongly degenerate diffusion equation, with the discontinuous flux. The development of steady-state concentration pro- files in a continuously operated clarifier-thickener is described. Numerical examples for construction of steady-state profiles and their applications for comparisons different modes of operation, to the control of sediment height are presented.
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Date submitted2012-09-19
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Date accepted2012-11-06
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Date published2013-03-01
The influence of mineralogical composition features on Severoonezhsk bauxite thermochemical enrichment
The analysis shows a sharp aggravation of resource replenishment problem on the mining enterprises of the country. The share explored to date active bauxite stocks is 60-68 %. Provision of proven bauxite reserves has reached a critically low level, and a strategic reserve for existing fields is insufficient. The situation is aggravated by the lack of new mining facilities and the discontinuance of exploration. While the resource base preparation in the volume, cost-effective for industrial development, requires 10-15 years with a concentration of significant resources. Unfortunately, in Russia there is no high quality bauxite, which is global alumina industry based on. One solution to this problem is to engage in the Bayer process production the low-quality bauxite with thermochemical pre-conditioning. Despite high energy costs, calcinations condition allows bauxite materials for a variety of technologically harmful contaminants such as organics, sulfide sulfur, carbonates, and post-treatment circulating alkaline solutions to improve the silicon module of bauxite concentrate. On the example of high-silicon chromium Severoonezhsk bauxite shows the positive role of calcinations in their processing and increase the possibility of multiple silicon module of bauxite ore, successfully processed by the Bayer method. Laboratory tests confirmed by the experimental-industrial tests.
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Date submitted2012-09-05
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Date accepted2012-11-30
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Date published2013-03-01
Use of phase voltage dc – component for control of melting regular alumina composition
A capability of control of melting alumina composition by means of a value of phase volt-age dc component is shown.
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Date submitted2012-09-27
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Date accepted2012-11-13
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Date published2013-03-01
Control and management e of electric arc ratio in ore-smelting furnace
In the case of phosphoric furnace the influence of changes in voltage and current to the power distribution in ore-smelting furnaces between the arc shunt resistance and melt are considers.
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Date submitted2012-09-28
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Date accepted2012-11-06
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Date published2013-03-01
Modern methods of monitoring and control based on electrophysical and electrochemical phenomena in ore-smelting furnace bath
- Authors:
- A. P. Suslov
Reviews modern methods of ore-smelting furnaces monitoring and control.
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Date submitted2012-09-28
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Date accepted2012-11-18
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Date published2013-03-01
Analysis of data on crystallochemical nature of the phases of the copper-nickel matte аnd a binary system Со–S
The task of the colour metallurgy is the complex utilization of the ore matirial and increase in volume of the production with fall of the material expenditures in parallel in unit of the production. During the sulphate ores refining and the nickel and copper ones they extract cobalt, pre- cious and the part of the rare metals, trying realize the very possible cobalts and small part of the ores raws transfer to the nickel product. However nickel can not be separated from copper completely with help of the flotation and that is why they get the sulphate nickel product which has the weight to 4 % of the copper and the copper sulphide concentration with weight 3-6 %. Together with nickel turn the part of the cobalt into the copper concentration. In the school and reference books there are little scientific well-founded and coordinated facts in phases compound of the stanes and finestanes and besides about formes of the presence of the cobalt in the called metallurgy products. It is necessary the deep experience in the study of the christall chemical nature of the finestanes phases for the improvement in extract of cobalt to the nickel product during the flotation process.
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Date submitted2012-09-25
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Date accepted2012-11-12
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Date published2013-03-01
Determination of optimal parameters of sulphatising roasting of phosphorus ferromanganese
- Authors:
- N. M. Telyakov
- A. A. Darin
The results of research to determine the optimal conditions of sulphatizing roasting in the complex technology of processing of phosphorus iron-manganese concretions are given.
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Date submitted2012-09-13
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Date accepted2012-11-06
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Date published2013-03-01
Substantiation of the process of transition of noble metals in solution when dissolved copper-nickel anodes on the basis оf the diagrams Purbe
The increasing need for precious metals causes necessity of development of secondary metallurgy. Now, the important condition of processing of waste of the radio-electronic industry is the fullest extraction of precious metals and reduction of weight of the rests. Assumptions of possible options of behavior of precious metals depending on conditions of conducting process of electrolysis on the basis of charts of Purbe are given.
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Date submitted2012-09-20
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Date accepted2012-11-23
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Date published2013-03-01
Study of the corrosion stability of some materials in the titanium (II) and (III) chloride melts
The corrosion stability of some pure metals and alloys in the titanium (II) and (III) chloride melts was investigated. It was demonstrated, that the rate and specific features of the process depend upon the chemical composition of metals. Under these conditions chrome-containing alloys are most influenced to the corrosion. Data of the relative corrosion stability of some materials were obtained.
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Date submitted2012-09-01
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Date accepted2012-11-08
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Date published2013-03-01
Kinetic oxidations of phenol by piroluzit containing minerals
- Authors:
- O. V. Cheremisina
- M. A. Sulimova
- D. E. Chirkst
The kinetics parameters of phenol oxidation by MnO2 on the surface of iron-manganese nodules at pH = 5,5±0,5 at temperature region from 293 till 353 K was described in this paper. The oxidation reaction runs by second order on phenol. At temperature region from 293 till 353 K the limited stage is chemical reaction. The activation energy of oxidation on the surface of iron-manganese nodules is equal 6,65 kJ/mol, and it is less than it’s one for oxidation on MnO2 surface (42,0 kJ/mol). The oxidation products are hydrohinon and less than 10 pier. % p-benzohinon.
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Date submitted2012-09-04
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Date accepted2012-11-01
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Date published2013-03-01
Means of air indication and monitoring
Technical and technological state of the modern industrial enterprises, ecological situation, danger of terroristic acts, require developing of modern means of the environment parameters monitoring. The article presents the system of indication and monitoring of atmospheric air, meeting the requirements of speed, selectivity, portability and autonomy, resistance to influence of external factors of various nature, intended to solve of the specified problem.
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Date submitted2012-09-16
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Date accepted2012-11-08
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Date published2013-03-01
Technical and mineralogical evaluation of low quality bauxite washability (an example of North Onega deposit)
- Authors:
- E. A. Alekseeva
- V. N. Brichkin
- N. V. Nikolaeva
The results of the technical and mineralogical studies of washability of low quality bauxites of North Onega deposit are presented. The experiments of determination of the grindability of raw materials including without ball grinding and assessment washability bauxite by magnetic separation and flotation were conducted. These ores are very complex object for enrichment, as characterized by extremely thin impregnated aluminum-containing minerals, as well as the similarity of their properties. Further work of to conduct experiments using chemical enrichment (as soon as the chemical enrichment, and in combination with the physical methods of enrichment) is planned.
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Date submitted2012-09-09
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Date accepted2012-11-06
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Date published2013-03-01
Mathematical modeling of heat transfer in pipelines and pipe’s objects
- Authors:
- Yu. V. Sharikov
- A. A. Markus
This article describes a mathematical model to estimate the thermophysical properties of insulation of pipelines and the development of a new type of insulating material. It is proposed to use a cellular structure insulating material, filled with air for thermal heating systems. Its effectiveness is confirmed by calculations performed using a mathematical model.
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Date submitted2012-09-26
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Date accepted2012-11-07
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Date published2013-03-01
Equations in full differentials of third order
- Authors:
- I. A. Lebedev
The article describes solution of the differentional equations in full differentials of third order.
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Date submitted2012-09-13
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Date accepted2012-11-18
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Date published2013-03-01
Modeling of the oxidation of sulfide ores with the aid of a cascade of continuous stirred-tank reactors
- Authors:
- Yu. V. Sharikov
- N. A. Karastelev
The method of recovery the refractory sulfide ores with the aid of pressure oxidation was examined. The basic processes of oxidation was discovered and the mathematical description of the process of sulfide oxidation in a heterogeneous system, the liquid – solid, was suggested. The ReactOp allowed to solve inverse problem – determination of kinetic parameters (E = 112 kJ/mol, ln(K) = 20 m/s) from the experimental data. On the basis of defined parameters is made and investigated the cascade of continuous stirred-tank reactors.
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Date submitted2012-09-14
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Date accepted2012-11-07
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Date published2013-03-01
Mathematical modelling of roastng of calc-nepheline and cement mixture in tubular rotary kilns
- Authors:
- O. V. Titov
The article is devoted to developing a mathematical models of the sintering processes of calcnepheline and firing the cement mixture in a tubular rotary kilns based chain curtains. Chain curtains are installed in a rotary kilns for the intensification of heat exchange between the material and burn the gas flow, drying material, dust and carbon capture. The influence of chain curtains on the processes of heat transfer and dust separation are investigated. The developed equations allow to describe these processes in a mathematical model of a tubular rotary kiln. The resulting mathematical model of sintering and firing is implemented in software package ReactOp.
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Date submitted2012-09-02
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Date accepted2012-11-09
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Date published2013-03-01
Membership function of process parameters formation based on fuzzy clustering оf production data
- Authors:
- N. V. Vasileva
- E. D. Kadyrov
Proposed a membership functions of process parameters forming method based on fuzzy clustering of production data. shows advantages of its use.
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Date submitted2012-09-28
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Date accepted2012-11-25
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Date published2013-03-01
Neuronet controller design for complex technological processes
- Authors:
- N. I. Koteleva
- N. V. Vasileva
The block diagram of the neural network controller design for complex technological processes is described. Shows the principle of its operation.
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Date submitted2012-09-12
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Date accepted2012-11-08
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Date published2013-03-01
Highly basic bauxite agglomerates
- Authors:
- V. A. Utkov
- O. V. Zyryanova
- M. G. Yakovlev
Agglomerates, sintered of the bauxite and limestone are need to reduce coke consumption in blast furnace slag smelting of high-alumina in order to get out of it quick-and heat-resistant cement. The peculiarity of such a high basicity sinter (the ratio of CaO / SiO2). The paper presents the results of studies demonstrating the ability of the liquid phase in the formation of sinter almost completely assimilate the lime. Bauxite highly basic sinter can be durable and resistant against destruction with open storage.
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Date submitted2012-09-06
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Date accepted2012-11-26
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Date published2013-03-01
Basic and strength of iron ore sinter
Extreme dependence of the strength of sinter from its basicity is explained by content in the agglomerate iron and calcium silicates, which form a bundle of strength sinter. Minimum strength of sinter corresponds basicity about 1,2-1,4. This proves the attempts to optimize the technology of this agglomerate with the planning of the experiment. Laboratory experiments have shown that the basicity of sinter with 1,4 at the optimal linear velocity of its sintering about 18,7 mm/min, obtained an acceptable yield ratio not more than 65 %, even at elevated (above 6 %) fuel rate. In order to increase the maximum strength of the agglomerate in this extreme dependence appropriate to increase the content of iron oxide. Found that with the increase in iron content of 1,5 % yield of the agglomerate increases by 1 %. It is noted that the increase in iron content in the agglomerate after the maximum strength can lead to some of its decline, due to increased melting of the charge and decreases the amount of a strength ferritic-calcium binding.
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Date submitted2012-09-25
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Date accepted2012-11-12
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Date published2013-03-01
Options metallurgical processing of iron ore Yakovlev field
- Authors:
- N. Yu. Lugovskii
- V. A. Utkov
A brief analysis of the main variant using of sinter ore Yakovlevskaya are given in respect that it is specific chemical composition. Production sponge iron technology and Midrex HYL are not require the consumption of scarce coke. Metallurgical coke can be save large amounts on modern steel plants through the using of iron-rich materials with a low content of harmful impurities (sulfur and phosphorus). Given the feasibility study and comparison of the above options.
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Date submitted2012-09-16
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Date accepted2012-11-15
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Date published2013-03-01
Management of technological processes by using of geoinformation technologies
- Authors:
- A. M. Blinov
The oil and gas industry of Russia starts to participate in the movement directed on modernization of technological processes according to appearance of modern automation, in particular, of geoinformation technologies. Application of these technologies allows to increase efficiency of all chain of processing and consumption of hydrocarbons.
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Date submitted2012-09-05
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Date accepted2012-11-06
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Date published2013-03-01
Assessment of the fractional composition of rock chips
- Authors:
- P. V. Ivanov
- A. V. Boikov
The enrichment is an integral part of the production process at the moment. This article evaluates the fractional composition of crushed rock as a result of the vibrating screen. The research is based on the use of visual screening process analysis and computer processing.
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Date submitted2012-09-05
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Date accepted2012-11-14
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Date published2013-03-01
Processing of manganiferous raw material producing high-quality product
At the present time the demand of manganese is high in Russia. Metallurgy industry lacks of high quality manganese products. They make strict requirements to manganese concentrates for phosphorous content. It is possible to increase the quality of manganese concentrates and to use law-quality manganese raw material in the processing by means of hydrometallurgical processing.
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Date submitted2012-09-09
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Date accepted2012-11-23
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Date published2013-03-01
Microalloying of aluminum as the method оf changing properties of powder oxidation film
The method of x-ray electronic spectroscopy investigated influence of strontium, bismuth and a lead and tin alloy on structure of superficial films of powders of oxide of aluminum. It is established that alloying additives are surface-active substances and concentrate mainly in a blanket, partially being oxidized together with aluminum. Being formed superficial films have impact on consumer properties of aluminum powders.
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Date submitted2012-09-30
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Date accepted2012-11-13
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Date published2013-03-01
Computer modeling of physical processes of gas-liquid reactor
Computer based modeling is increasingly strengthening its position in equipment designing, especially unique meeting particular needs of production line or certain plant of metallurgy. There are several reasons for that such as economic benefits, wide range of geometry available to be built and possibility of comprehensive study on materials reliability as well as virtual model testing in working regime. One of the most applied and therefore permanently developed program packages for fluid behavior modeling is Fluent product of ANSYS company. The package is being used for creation first physical and in future chemical model which will be capable to describe and predict process and reactions behavior of high quality taking place in gold leaching gas-liquid reactor with thiosulphate using.
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Date submitted2012-09-01
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Date accepted2012-11-24
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Date published2013-03-01
Alternative variant of trof converter process
- Authors:
- G. V. Konovalov
- T. R. Kosovtseva
The article is devoted alternative variant of converting copper metal materials in the converter with intense heat and mass transfer formed by a high-pressure fuel lances. Exploratory studies converting copper metal waste in jet mode rotation were performed on the fire model.