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Efficient Synchronous Extraction of Nickel, Copper, and Cobalt from Low–Nickel Matte by Sulfation Roasting‒Water Leaching Process

Qiangchao Sun, Hongwei Cheng

2020ennickelcoppercobaltsulfationleaching

Abstract

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This paper investigates an efficient method for extracting nickel (Ni), copper (Cu), and cobalt (Co) from low-nickel matte, addressing the low recovery efficiency typical of traditional pyrometallurgical processes. The objective was to optimize the parameters and mechanisms of sulfation roasting followed by water leaching using sodium sulfate as a sulfating additive. Employing rigorous testing under varying conditions, it was established that the recovery efficiencies reached 95% for Ni, 99% for Cu, and 94% for Co, while iron (Fe) recovery remained below 1%. The results elucidate that the sulfation roasting pretreatment forms a liquidus eutectic compound sulfates [Na2Me(SO4)2] (Me = Ni, Cu, Co) at the solid-solid interface, significantly enhancing leaching efficiency. This process not only boosts the reaction kinetics of sulfation but also increases the utilization efficiency of SO2/SO3, presenting a sustainable and eco-friendly method for the simultaneous extraction of these valuable metals from low-grade sulfide ores. Given the declining grades of sulfide ores and the rising demand for nickel, improving extraction techniques is vital for comprehensive recycling of this strategic resource.

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Cite This Work

@article{7c2e15d4-e747-4fb0-8aca-0f072192c9c3,
  title={Efficient Synchronous Extraction of Nickel, Copper, and Cobalt from Low–Nickel Matte by Sulfation Roasting‒Water Leaching Process},
  author={Qiangchao Sun and Hongwei Cheng},
  year={2020},
  language={en}
}
TY  - JOUR
TI  - Efficient Synchronous Extraction of Nickel, Copper, and Cobalt from Low–Nickel Matte by Sulfation Roasting‒Water Leaching Process
AU  - Qiangchao Sun
AU  - Hongwei Cheng
PY  - 2020
LA  - en
ER  -

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