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M. I. Kalashnikova
M. I. Kalashnikova
Gipronickel Institute LLC
Gipronickel Institute LLC

Articles

Metallurgy and concentration
  • Date submitted
    2015-10-25
  • Date accepted
    2015-12-04
  • Date published
    2016-04-01

Regularities of selenium and chromium behavior in redox processes during hydrometallurgic treatment of solid phase products of rhenium extraction

Article preview

The main source of selenium is copper anode slime. But during the pyrometallurgical treatment of sulphide polymetallic ores significant amount of selenium along with radiogenic osmium and rhenium is concentrated in the solid-phase products of acid wash extraction and cannot be extracted, as gets lost with discharged chromium-containing solutions of osmium stage. The paper presents results of research into selenium reduction in the chromium-containing sulfuric acid medium by sulfurous gas and sodium sulphite. The use of the above reducers in optimum conditions leads to almost complete recovery of selenium (VI) while selenium (IV) extraction rate is not exceeding 60 %. The chrome (III) present in solutions has no impact on the selenium extraction rate. Chrome (VI) is almost completely reduced to a trivalent state, thus its negative impact on subsequent rhenium sorption from solutions purified from selenium is excluded. In view of a high rate of selenium extraction from chromium-containing sulfuric acid solutions formed in the process of radiogenic osmium production using sulfurous gas and sodium sulphite, choice of a method for selenium reduction is to a great extent dependent on the company’s profile.

How to cite: Petrov G.V., Kalashnikova M.I., Fokina S.B. Regularities of selenium and chromium behavior in redox processes during hydrometallurgic treatment of solid phase products of rhenium extraction // Journal of Mining Institute. 2016. Vol. 220. p. 601. DOI: 10.18454/PMI.2016.4.601
Without section
  • Date submitted
    2012-09-11
  • Date accepted
    2012-11-23
  • Date published
    2013-03-01

The role of mineralized additivies in the alumina phase transformation process

Article preview

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.

How to cite: Sizyakov V.M., Dubovikov O.A., Nikolaeva N.V., Kalashnikova M.I. The role of mineralized additivies in the alumina phase transformation process // Journal of Mining Institute. 2013. Vol. 202. p. 48.
Without section
  • Date submitted
    2004-12-25
  • Date accepted
    2005-01-10
  • Date published
    2005-07-01

Precipitation of heavy non-ferrous metals from sulfate solutions by sulfur-containing precipitants

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Research on precipitation of heavy non-ferrous metals from sulfate solutions by sulfur-containing precipitants of different composition has been carried out. It is shown that, depending on the composition of the precipitant and process parameters, non-ferrous metals are precipitated from solutions in the form of compounds of different forms with different content of one or another component.

How to cite: Kalashnikova M.I. Precipitation of heavy non-ferrous metals from sulfate solutions by sulfur-containing precipitants // Journal of Mining Institute. 2005. Vol. 165. p. 93-95.
Without section
  • Date submitted
    2004-12-24
  • Date accepted
    2005-01-07
  • Date published
    2005-07-01

Autoclave leaching of substandard ore sulfide concentrates of heavy non-ferrous metals

Article preview

Scientific bases of construction of automated control systems of technological processes are given. The necessity of considering mining and metallurgical processing and metallurgical processes at large enterprises as automated technological complexes is substantiated. The basis for the creation of automated process control systems is a system approach to the production process with the allocation and combination of regulation, control and information aspects within its framework.

How to cite: Shneerson Y.M., Kalashnikova M.I. Autoclave leaching of substandard ore sulfide concentrates of heavy non-ferrous metals // Journal of Mining Institute. 2005. Vol. 165. p. 218-220.