Voinkov R.S.,Uralelektromed' Company |
Mastyugin S.A.,Uralelektromed' Company |
Korolev A.A.,Uralelektromed' Company |
Lobanov V.G.,Ural Federal University |
Toporkova Y.I.,Ural Federal University
Metallurgist | Year: 2015
The research discussed in this article was performed to make the processing of sludge formed in the electrolytic refining of copper more efficient. Results are presented from studies involving selection of the reagent regime and optimization of the conditions for leaching lead from tailings formed in the flotation concentration of decopperized sludge. The main components of the raw materials that were studied: lead oxysulfate (up to 60%) and oxidized complex compounds of antimony (up to 30%). Industrial complexons were proposed for use as the solvents. The tests showed that preference should be given to the use of alkaline solutions of oxyethylenediphosphoric (OEDP) acid. The kinetic features of the process were studied by using a method which employs a rotating disk of synthetic tribasic lead sulfate. The experimental rate constant for the leaching of lead in an OEDP solution reaches 6·10−6 g-ion/(cm2·sec). It was established that the process is diffusional in nature and that the effect of temperature is negligible. A large-scale balance experiment involving the removal of lead from flotation tailings was performed in a laboratory. The experiment established that the level of recovery of lead in an alkaline solution of OEDP reaches 85% and that the other important components of the sludge (antimony and noble metals) remain almost entirely in the undissolved residue. © 2015, Springer Science+Business Media New York.
Skopov G.V.,UGMK Holding |
Matveev A.V.,Uralelektromed Company
Metallurgist | Year: 2011
Results are presented for a study of combined melting of dust that is complex with respect to chemical and mineral composition from Vanyukov furnace electric filters and the magnetic fraction of zinc production clinker separation in an ore heating furnace. The possibility of arsenic concentration in slag and sublimates is demonstrated by controlling the reducing capacity of a charge. © 2011 Springer Science+Business Media, Inc.
Kondrat'Eva T.F.,Russian Academy of Sciences |
Pivovarova T.A.,Russian Academy of Sciences |
Bulaev A.G.,Russian Academy of Sciences |
Melamud V.S.,Russian Academy of Sciences |
And 3 more authors.
Hydrometallurgy | Year: 2012
Laboratory experiments in percolators have demonstrated effective bioleaching of copper and zinc, as well as recovery of precious metals from flotation tailings of the Svyatogor concentrator. The defined culture constructed from strains of acidophilic chemolithotrophic microorganisms exhibited higher rates of bioleaching than the indigenous culture obtained from the acid mine drainage. Treatment of the substrate with sulfuric acid (pH 1.24) resulted in recovery of 48.6% of zinc, 28.2% of copper, and 2.8% the total iron. Acidic percolation leaching and biooxidation for 134 days with the indigenous and defined cultures resulted in solubilization of 59.5 and 87.0% zinc, 46.0 and 54.5% copper, and recovery of 56.4 and 57.8% gold and 50.5 and 50.9% silver, respectively. © 2011 Elsevier B.V. All rights reserved.