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Preparation of Ni–Fe–S Matte from Nickeliferous Laterite Ore Using CaS as the Sulfurization Agent

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Abstract

In the present work, a novel method of producing Ni–Fe–S matte from saprolite type laterite (SL) ores was proposed using CaS as the sulfurization agent at 1500 °C under Ar atmosphere. The prepared Ni–Fe–S matte could be used as the raw material for the preparation of metallic nickel. CaS was prepared by reducing CaSO4 with graphite under Ar atmosphere. It was found that as increasing CaS addition, the recovery extents of Ni increases, while the Ni grade of Ni–Fe–S matte decreases. When the CaS addition was 6 times of the stoichiometric quantity required for the sulfurization of NiO, the recovery extents of Ni, Ni grade and CaS utilization degree reach to 93.63 pct, 8.84 wt pct and 92.10 pct, respectively. Compared with the reported method of using S2 as the sulfurization agent, the use of CaS in the present work can reduce the SO2 emission and improve the recovery extent of Ni. Besides, the feasibility of using CaSO4 as the sulfurization agent was also investigated at 1500 °C. Unfortunately, the carbon, which was used to reduce the CaSO4, could also react with NiO and Fe2O3 to produce the Ni–Fe alloy at 1500 °C. Accordingly, CaS is a better sulfurization agent than CaSO4.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (51734002).

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, P.R. China

    Hong-Yang Wang, Yong Hou, He-Qiang Chang, Guo-Hua Zhang & Kuo-Chih Chou

  2. Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals, University of Science and Technology Beijing, Beijing, 100083, P.R. China

    Hong-Yang Wang, Yong Hou, He-Qiang Chang, Guo-Hua Zhang & Kuo-Chih Chou

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  1. Hong-Yang Wang
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  2. Yong Hou
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Wang, HY., Hou, Y., Chang, HQ. et al. Preparation of Ni–Fe–S Matte from Nickeliferous Laterite Ore Using CaS as the Sulfurization Agent. Metall Mater Trans B 53, 1136–1147 (2022). https://doi.org/10.1007/s11663-022-02444-2

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  • DOI: https://doi.org/10.1007/s11663-022-02444-2

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