Thermodynamic interaction and iron passivation mechanism of copper–cobalt sulfide concentrates during pressure leaching

Zheng, Chaozhen; Jiang, Ke; Cao, Zhanmin; San-ping, Liu; Wang, Haibei; Ma, Hao

doi:10.1007/s11696-023-02663-0

Cited by 3 publications

(3 citation statements)

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“…The leaching kinetics and shrinking core model from past experience explain the lower dissolution rate of cobalt than copper [4]. The leaching rate was controlled by chemical reactions during the early stages and may be controlled by diffusion in the later stages.…”

Section: Effect Of Leaching Timementioning

confidence: 85%

“…Because there is a high proportion of secondary copper sulfide minerals, such as chalcocite, in the ore, chalcocite acts as a reducing agent in the leaching process. The following reactions may occur during this process [4,30]:…”

Section: Analysis Of Cobalt-bearing Minerals During Leachingmentioning

confidence: 99%

“…Thus, as one of the largest producers of copper and cobalt in the world, the Democratic Republic of the Congo is known to have much complexity and diversity in its coppercobalt-bearing ores [2,3]. The development and utilization of copper-cobalt ore is mainly in the Central African copper-cobalt metallogenic belt, which holds 10% of the world's copper and 70% of the cobalt resources [4]. The copper-cobalt ore in the Democratic Republic of the Congo region can mainly be divided into sulfide, oxide, and sulfide-oxide mixed ores.…”

Section: Introductionmentioning

confidence: 99%

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Agitation Leaching Behavior of Copper–Cobalt Oxide Ores from the Democratic Republic of the Congo

et al. 2023

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Agitation leaching is a promising technology in hydrometallurgy for treating copper–cobalt oxide ores. In this work, the behavior of oxide ores containing around 2.3% Cu and 0.3% Co received from Congo was investigated for varying particle size, acidity, pulp density, temperature, leaching time, and reduction potential. XRD, optical microscopy (OM), and ICP-OES methods were used to examine the chemical composition, morphology, and metal content of the samples. The copper and cobalt recovery reached 88.2% and 82.5%, respectively, at room temperature, with a leaching time of 4 h, a pulp density of 33%, an acidity of 178 g/L, and no reductant. The Cu and Co remaining in the leaching residue were found to be in their sulfide forms and coated with dense and fine calcium sulfate. To improve the metal recovery, a combination of flotation and agitation leaching of the flotation tailings method was adopted, after which the Cu and Co recovery reached 96.6% and 86.0%, respectively.

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Section: Effect Of Leaching Timementioning

confidence: 85%

Section: Analysis Of Cobalt-bearing Minerals During Leachingmentioning

confidence: 99%