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Date submitted1977-10-12
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Date accepted1977-12-08
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Date published1978-04-01
Optimal load distribution during concentrate drying at concentrators
- Authors:
- V. G. Deitch
- V. V. Stalsky
- S. V. Storozhenko
In many beneficiation plants, for example, in the beneficiation of iron ores, it is possible to regulate the mass flow rate of cake (load) entering the drying units ....
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Date submitted1977-10-03
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Date accepted1977-12-14
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Date published1978-04-01
Boundaries of applicability of the search-free method of optimization of beneficiation processes
- Authors:
- V. I. Zlatkin
The problem of static mode optimization for a number of the most important processes of mineral processing can be reduced to a linear programming problem ...
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Date submitted1977-10-05
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Date accepted1977-12-18
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Date published1978-04-01
Own and mutual capacitance of “point” electrodes in the presence of dielectric layer
- Authors:
- E. S. Krichevsky
- V. G. Deitch
- V. P. Terekhov
Let at a distance d from a plane-parallel layer of thickness a with dielectric constant e a spherical conductor of radius g is placed, or a capacitor consisting of two such conductors located at a distance I from each other ...
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Date submitted1977-10-19
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Date accepted1977-12-17
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Date published1978-04-01
Resolution ability of automated thermovacuum moisture meters
- Authors:
- A. G. Volchenko
Thermovacuum method of moisture measurement is based on the temperature change of a thin layer of sample in the process of moisture cesorption in vacuum. A sample of finely dispersed material is poured in a thin layer into a cuvette, the bottom of which serves as a flat thermosensitive element (TSE) ...
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Date submitted1977-10-18
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Date accepted1977-12-01
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Date published1978-04-01
Parameter estimations of mathematical models of technological processes
One of the most promising classes of mathematical models of production processes of complex structure, such as production processes of mineral processing, are structural models represented by systems of nonlinear equations ...
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Date submitted1977-10-04
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Date accepted1977-12-11
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Date published1978-04-01
Method of measuring cargo weight in dump truck by built-in weighing device
- Authors:
- M. A. Semenov
One of the ways to determine the mass of the cargo directly in the dump truck is a combined measurement of pressure in the cavities of the rear cylinders of the pneumohydraulic suspension and in the pressure line of the cylinders of the cylinders of the platform lifting mechanism when unloading the dump truck ...
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Date submitted1977-10-25
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Date accepted1977-12-24
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Date published1978-04-01
Method of measuring the resistance of the filtering layer of a vacuum filter when studying it as an object of automatic control
- Authors:
- A. G. Tsai
When creating a mathematical model of the process of filtration in a drum vacuum filter for the purpose of its automation there are difficulties associated with the lack of methods of experimental determination of the value of resistance of the sludge and filtering partition ...
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Date submitted1977-10-21
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Date accepted1977-12-27
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Date published1978-04-01
Capacitive-thermal moisture meter of bulk enrichment products
- Authors:
- E. S. Krichevsky
- V. P. Terekhov
High-frequency moisture meters have been successfully used to measure the moisture content of a number of beneficiation products. However, when measuring the moisture content of bulk materials having low goodness-of-fit (e.g., metal-containing cakes), there are difficulties in developing circuits that allow measurement of the electrical capacitance of the material under low goodness-of-fit conditions ...
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Date submitted1977-10-29
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Date accepted1977-12-02
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Date published1978-04-01
About one variation of the thermophysical method of measuring the moisture content of bulk enrichment products
The electrophysical characteristics of beneficiation products arriving at mining and processing plants from different deposits tend to be heterogeneous ...
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Date submitted1977-10-24
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Date accepted1977-12-20
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Date published1978-04-01
Modeling of the automatic control system of the closed cycle of grinding on the analog computing machine
Despite the large number of works devoted to models of single-stage nickel grinding, there is no model reflecting the relationship between the main grinding parameters and the classifier discharge fineness ...
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Date submitted1977-10-03
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Date accepted1977-12-02
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Date published1978-04-01
Using the predictive signal for solving the problem of optimal control of the drying drum
- Authors:
- V. G. Deitch
- V. V. Stalsky
Previously, the authors proposed a mathematical model of the process of cake drying in a rotating drying drum with longitudinal feeding of the drying agent. On the basis of this model was set and solved by methods of classical calculus of variations the problem of optimal control of the drying unit ...
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Date submitted1977-10-02
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Date accepted1977-12-09
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Date published1978-04-01
Mathematical model of heat exchange in multi-pipe systems of heat and water supply of coal mines
In the regions of the Far North the surface method of pipeline laying is becoming more and more widespread, which has a number of advantages in comparison with pipe-laying in perennially frozen soils. To protect pipelines from freezing, cold water pipelines are laid in common insulation with one or more pipelines that transport hot water ...
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Date submitted1977-10-01
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Date accepted1977-12-08
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Date published1978-04-01
Primary converters of thermovacuum moisture meters
- Authors:
- A. G. Volchenko
- R. M. Proskuryakov
The thermovacuum moisture meters are based on the following phenomenon: if a thin layer of the tested material is placed in a vacuum chamber and air is pumped out of it, the temperature of the material will start to decrease. Simultaneously, convective heat flow from the walls of the chamber and the surface of the material ...
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Date submitted1977-10-26
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Date accepted1977-12-13
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Date published1978-04-01
Digital adder of cargo weight for built-in weighing devices
- Authors:
- Yu. A. Alekseenko
- V. A. Gardzish
- M. A. Semenov
At automation of operational accounting of quarry motor transport work with the help of built-in weighing devices there is a necessity of accumulation of information about the mass of the transported cargo for a working shift. This task can be solved by means of digital totalizers ...
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Date submitted1977-10-09
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Date accepted1977-12-10
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Date published1978-04-01
Correction of nonlinearity of temperature dependence of thermistor resistance in the bridge circuit
- Authors:
- A. A. Seliverstov
Due to a number of advantages over other types of temperature transducers thermistors are widely used in various devices of thermal control - moisture meters, flow meters, level gauges, etc. In these devices, in order to exclude the influence of the initial tc temperature of the material, a differential inclusion of two thermistors having identical temperature dependences is usually used in the area of possible change of the initial temperature of the material ...
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Date submitted1977-10-24
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Date accepted1977-12-09
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Date published1978-04-01
Physical bases of construction of primary transducers for control of liquid droplets in air or gas flow
- Authors:
- E. S. Krichevsky
- N. S. Sabadash
- I. A. Tyushina
When operating technological systems associated with the use of air or gas flow (for example, systems for purification of industrial gases, pneumostransportation of bulk materials, artificial reduction of air humidity), there is a possibility of getting into the air line drops of liquid ...
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Date submitted1977-10-03
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Date accepted1977-12-17
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Date published1978-04-01
High-frequency system of express control of moisture content of KSMC concentrates
- Authors:
- A. F. Avdeeva
- A. V. Shipulin
The process control system of Nalchik hydromet plant requires operative information on humidity of initial industrial products of KSMP. The currently used thermogravimetric method requires 4 hours for drying of industrial products at a temperature of 105°C to a constant weight ...
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Date submitted1977-10-05
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Date accepted1977-12-27
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Date published1978-04-01
Automatic accounting of the number of fully loaded dump cars
- Authors:
- E. A. Kalm
- P. S. Timofeev
At Apatit, apatite ore is delivered from the mines to the concentrators by railroad dump trucks with a capacity of 100 tons. Loading of dumpcars is carried out by a hatch worker from the ore mines or bunkers of loading stations ...
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Date submitted1977-10-12
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Date accepted1977-12-23
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Date published1978-04-01
Features of measuring circuits with parametric modulation
- Authors:
- V. G. Valeev
- A. F. Avdeeva
When controlling the moisture content of materials with large dielectric losses, schemes that allow measuring the components of the complex resistance of the capacitive transducer are usually used. The greatest sensitivity among them is characterized by bridge meters ...
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Date submitted1977-10-18
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Date accepted1977-12-03
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Date published1978-04-01
Using the principles of high-frequency humidity control for determining the end of drying of complex bioproducts in vacuum drums
- Authors:
- A. V. Gvozdev
- N. S. Sabadash
The solution of the problem of automatic, control of the end of drying of raw materials in vacuum-horizontal boilers will allow to increase the output of high quality products with lower energy costs, to keep the current standards for shipped products and to obtain a significant economic effect ...
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Date submitted1977-10-22
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Date accepted1977-12-06
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Date published1978-04-01
Investigation of dynamic parameters of the primary converter of the vacuum filter cake mass flow rate
- Authors:
- A. G. Tsai
The paper investigates the dynamic properties of the primary transducer of cash cake flow rate, installed on the belt conveyor of a drum vacuum filter with an internal filtering surface. The basis of the transducer is a horizontal rectangular movable platform resting in corner points on elastic membrane elements, which are united in a common hydraulic system ...
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Date submitted1977-10-27
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Date accepted1977-12-19
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Date published1978-04-01
Frequency mixers for high-frequency capacitance meters made on the scheme of F-meter
- Authors:
- E. A. Kalm
To control the composition of substances, their molecular state, moisture content of various materials in measurement technology is widely used dependence of dielectric permittivity value on these parameters. In this case the change of dielectric permittivity of the substance filling the measuring capacitor, which is the primary measuring transducer, leads to a change in its initial electrical capacitance ...
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Date submitted1977-10-06
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Date accepted1977-12-19
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Date published1978-04-01
Sensitivity of the capacitive primary density transducer
- Authors:
- E. V. Zhilkina
Let us consider the principle underlying the measurement of pulp density by the capacitive method in the case of a non-contact two-electrode measuring cell. In the analysis we will use the equation for the imaginary Bp component of the conductivity of the equivalent circuit of the cell ...
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Date submitted1977-10-11
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Date accepted1977-12-07
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Date published1978-04-01
Investigation of the design parameters of the conductometric slurry density transducer
- Authors:
- E. V. Zhilkina
The objective of the study was to investigate the potential electric fields of a seven-electrode conductometric transducer in order to find its optimal design parameters. Since the seven-electrode converter is two four-electrode cells connected in series, modeling was performed for the case of a four-electrode primary converter .....
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Date submitted1977-10-06
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Date accepted1977-12-07
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Date published1978-04-01
Influence of the schemes of the executive body drive of the mechanohydraulic harvester on its theoretical productivity
- Authors:
- B. S. Makhovikov
Modern mechanohydraulic harvesters with a hydraulic turbine drive, prototypes of which are being industrially tested at hydraulic mines in Kuzbass, are self-propelled machines of selective action with actuators in the form of crown cutters...
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Date submitted1977-10-25
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Date accepted1977-12-13
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Date published1978-04-01
Statistical characteristics of the Vorkuta region atmospheric air temperature fluctuations as the main perturbation of the system of automatic control of thermal objects of mines
Calculation and adjustment of regulators, as well as the choice of optimal modes of operation of thermal engineering objects (mine calorifiers, boilers, boiler rooms, boiler houses, heat and water supply systems of mines, settlements and cities) are determined by the value of the atmospheric air temperature ...
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Date submitted1977-10-18
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Date accepted1977-12-13
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Date published1978-04-01
Pneumohydraulic suspension of heavy-duty dump trucks as a source of measuring information for built-in weighing devices
- Authors:
- V. A. Gardzish
- M. A. Semenov
In the development of mineral deposits by open-pit method for transportation of rock mass is the most promising road transport, and, in particular, heavy-duty dump trucks of the Belarusian Automobile Plant BelAZ-540, BelAZ-548A and BelAZ-549 with carrying capacity of 27, 40 and 75 tons, respectively. Improving the efficiency of the use of dump trucks is hindered by the imperfection of the existing operational control of the mass of the transported cargo and the lack of normalization of loading dump trucks at excavators ...
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Date submitted1977-10-16
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Date accepted1977-12-26
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Date published1978-04-01
Increase of accuracy of humidity measurement by thermovacuum method
The experience of application of various methods of measuring the moisture content of complex general fertilizers in production conditions confirms the prospectivity and operability of thermovacuum moisture ...
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Date submitted1977-10-23
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Date accepted1977-12-02
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Date published1978-04-01
Pneumatic control system of the dust suppressing curtain
- Authors:
- E. K. Kersky
Spark-explosion-proof control systems of water dust suppressing curtains are not produced by the domestic industry. Existing semi-automatic systems such as PB-1, developed by the institute “VNIItsvetmet”, and similar to them work on the photoelectric principle, powered from the AC network ...
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Date submitted1977-10-05
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Date accepted1977-12-22
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Date published1978-04-01
Development of automatic control system of thickening process
- Authors:
- V. P. Nazarov
A modern automated system is created as a system of optimal control in the sense that the solutions it produces should be aimed at achieving a certain specified control objective. The formulation and solution of the optimal control problem requires a mathematical description of the object, determination of the constraints imposed by the real production process, and selection of the control criterion ...
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Date submitted1977-10-18
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Date accepted1977-12-14
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Date published1978-04-01
Radio control of DET-250 bulldozer
- Authors:
- E. K. Kersky
At the Mukulansky open pit of Tyrnyauz Mining and Metallurgical Combine bulldozers are often forced to work in dangerous areas above the excavated space and on unstable areas of rock from the shafts during their leveling. Very dangerous is the presence of people and machines on the so-called collapse prism - a part of the shaft surface, which even with a slight additional load can lose its grip on the main mass of rock of the moldboard and under the action of its own weight collapse downwards together with the bulldozer and people ...