RESEARCH OF REGULARITIES OF LEACHING THE SULFATED CINDERS OBTAINED DURING ROASTING OF COPPER-ZINC MIDDLINGS
https://doi.org/10.17073/0021-3438-2017-3-23-30
Abstract
The paper presents results obtained in the analysis of thermodynamic properties and research findings on kinetic regularities of the leaching process of a new type of sulfated copper-zinc middlings formed when removing sulfide materials which cannot be effectively filtered out by flotation. Analysis of kinetic curves shows that for any acid concentration in the range of 0–20 g/dm3, the reaction rate at the start time (30 min) differs markedly from the subsequent period. At the start time the rate is controlled only by external diffusion, and after 30 minutes of the process time the kinetic hindrances begin to occur. The paper determines the order of cinder leaching reactions: 1,0±0,1 for copper, 0,87±0,1 for zinc, 0,56±0,1 for iron. The results of calculating the apparent leaching reaction rate constant showed its weak temperature dependence, which correlates well with thermodynamic analysis data.
About the Authors
A. M. Panshin
LLC «UMMC-Holding»
Russian Federation
Russian Federation
Dr. Sci. (Tech.), technical director
(624091, Sverdlovsk region, Pyshma, Uspenskii av., 1).
S. V. Mamyachenkov
Ural Federal University
Russian Federation
Russian Federation
Dr. Sci. (Tech.), prof., Department of metallurgy of heavy non-ferrous metals
(620002, Russia, Yekaterinburg, Mira str., 19).
D. L. Tropnikov
JCS «Svyatogor»
Russian Federation
Russian Federation
Director
(624330, Sverdlovsk region, Krasnoural’sk, Kirov str., 2).
O. S. Anisimova
Ural Federal University
Russian Federation
Cand. Sci. (Tech.), associate prof., Department of metallurgy of heavy non-ferrous metals
Russian Federation
Cand. Sci. (Tech.), associate prof., Department of metallurgy of heavy non-ferrous metals
D. A. Rogozhnikov
Ural Federal University
Russian Federation
Cand. Sci. (Tech.), associate prof., Department of metallurgy of heavy non-ferrous metals
Russian Federation
Cand. Sci. (Tech.), associate prof., Department of metallurgy of heavy non-ferrous metals
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Review
For citations:
Panshin A.M., Mamyachenkov S.V., Tropnikov D.L., Anisimova O.S., Rogozhnikov D.A. RESEARCH OF REGULARITIES OF LEACHING THE SULFATED CINDERS OBTAINED DURING ROASTING OF COPPER-ZINC MIDDLINGS. Izvestiya. Non-Ferrous Metallurgy. 2017;(3):23-30. (In Russ.) https://doi.org/10.17073/0021-3438-2017-3-23-30
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