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ArticleName Influence of surface-active substances on sulfur state during the autoclave leaching of zinc concentrates
DOI 10.17580/tsm.2017.02.07
ArticleAuthor Khazieva E. B., Sviridov V. V., Naboychenko S. S., Menshchikov V. A.

Ural Federal University named after the First President of Russia B. N. Yeltsin, Ekaterinburg, Russia:

E. B. Khazieva, Leading Engineer, e-mail:
S. S. Naboychenko, Professor, Head of a Chair of Non-Ferrous Metals Metallurgy
V. A. Menshchikov, Leading Engineer


Ural State Polytechnical University, Ekaterinburg, Russia:
V. V. Sviridov, Professor


High-temperature autoclave oxidation leaching of sulfide zinc concentrates is accompanied by elemental sulfur forming, which covers and blocks the mineral surface. This leads to decrease of the ratio of leaching and formation of sulfur-sulfide pellets. Application of surface-active substances allows to decrease the wettability of minerals by elemental sulfur and remove the pellet formation. This paper is devoted to investigation of the influence of the surface-active substances on the wettability of zinc sulfide and autoclave leaching of zinc concentrates. For this purpose, there was tested the range of anionic and cationic surface-active substances with various chemical composition. There was offered the method of definition of selective wettability of minerals according to the relation of spreading coefficients, which allows to define the potential efficiency of surface-active substances. There was also considered the influence of two contract-active reagents on the indicators of autoclave leaching of zinc concentrate. The joint usage of stabilizers and dispergators allows to increase the extraction of zinc, and remove the pellet formation with lesser reagent consumption. The positive effect of mixture of surface-active substances is reached due to the increasing of the zinc sulfide wettability with solution and due to the colloid protection of sulfur particles as a result of solvate-adsorption and structural stabilization factors. There are offered the optimal compositions of mixtures of surface-active substances, making possible the extraction of 95% of zinc with the absence of pellet formation.

keywords Autoclave leaching, contact angle, selective wettability, agregatrive stability, surface-active substances, sulfur-sulfide pellets, stabilization

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