Behavior of cobalt-containing phases in hydrochloride decomposition of sulfide Cu–Ni materials

Behavior of cobalt-containing phases in hydrochloride decomposition of sulfide Cu–Ni materials Effect of the solution redox potential on the behavior of cobalt-containing phase components of sulfide copper-nickel concentrates in the Cu(II)/Fe(III)–Cl––HCl–Cl2 system was studied. It was shown that, at solution redox potentials in the range 350–650 mV, phases based on heazlewoodite, pentlandite, cobaltous pentlandite, and cobalt pentlandite are transformed to thiospinels from the linneite group (M3S4, where M = Ni, Fe, Co). The resulting thiospinels are dissolved, with the exception of Co3S4, at solution redox potentials of 450 mV and less. The Co3S4 thiospinel is a stable compound in concentrated chloride solutions up to 650 mV, which, in the system under study, may be a reason for the poor cobalt recovery from sulfide concentrates. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Behavior of cobalt-containing phases in hydrochloride decomposition of sulfide Cu–Ni materials

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Publisher
Pleiades Publishing
Copyright
Copyright © 2017 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427217010025
Publisher site
See Article on Publisher Site

Abstract

Effect of the solution redox potential on the behavior of cobalt-containing phase components of sulfide copper-nickel concentrates in the Cu(II)/Fe(III)–Cl––HCl–Cl2 system was studied. It was shown that, at solution redox potentials in the range 350–650 mV, phases based on heazlewoodite, pentlandite, cobaltous pentlandite, and cobalt pentlandite are transformed to thiospinels from the linneite group (M3S4, where M = Ni, Fe, Co). The resulting thiospinels are dissolved, with the exception of Co3S4, at solution redox potentials of 450 mV and less. The Co3S4 thiospinel is a stable compound in concentrated chloride solutions up to 650 mV, which, in the system under study, may be a reason for the poor cobalt recovery from sulfide concentrates.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Apr 25, 2017

References

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