Improvement of arsenic trisulfide precipitation from sulfuric acid production flush waters at copper works
https://doi.org/10.17073/0021-3438-2017-2-36-42
Abstract
The sulfide method for purification of sulfuric acid production flush waters have such disadvantages as the formation of finely dispersed (0,3 to 1,5 μm particle size) difficult-to-filter precipitates of arsenic sulfide (III) and the risk of hydrogen sulfide release into the atmosphere in case of sodium hydrosulfide overdose. The article studies the process of arsenic sulfide sols coagulation in order to develop a more effective and fast precipitate filtration technology. The article determines filtering rates in various modes of sodium hydrosulfide feeding, and dependence of the settling and filtering rates on the presence of coagulants – iron sulfate and aluminum sulfate. It was found that the implementation of dispersed feeding of sodium hydrosulfide during the arsenic sulfide precipitation in combination with the use of inorganic coagulant – ferric sulfate (III) would make it possible to increase the size of As2S3 particles by several times, and to increase filtering and settling rates of pulps.
About the Authors
S. V. Mamyachenkov
Ural Federal University named after first President of Russia B.N. Yeltsin
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor of the Department of metallurgy of heavy non-ferrous metals of Ural Federal University named after first President of Russia B.N. Yeltsin (620002, Russia, Yekaterinburg, Mira str., 19)
O. S. Anisimova
Ural Federal University named after first President of Russia B.N. Yeltsin
Russian Federation
Cand. Sci. (Eng.), Associate professor of the same Department
Russian Federation
Cand. Sci. (Eng.), Associate professor of the same Department
D. A. Kostina
Ural Federal University named after first President of Russia B.N. Yeltsin
Russian Federation
Student of the same Department
Russian Federation
Student of the same Department
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Review
For citations:
Mamyachenkov S.V., Anisimova O.S., Kostina D.A. Improvement of arsenic trisulfide precipitation from sulfuric acid production flush waters at copper works. Izvestiya. Non-Ferrous Metallurgy. 2017;(2):36-42. (In Russ.) https://doi.org/10.17073/0021-3438-2017-2-36-42
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