红土镍矿高料层碳热还原试验

doi:10.13228/j.boyuan.issn0449-749x.20200142

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Abstract Laterite nickel ore is one of the main raw materials for the production of ferronickel alloy. The size of ferronickel particles after carbothermal reduction is very important for the later magnetic separation. Based on this, the experimental study of carbothermal reduction of laterite nickel ore under the condition of the tall pellets bed was carried out. Also, the influence and mechanism of the reducing temperature, the reducing time, and the amount of additive CaO on the size of metallized ferronickel particles were investigated. The experimental results show that, under the condition of C/O=1.0, the optimum reducing parameters are 1400 ℃ and 45 min. Under these conditions, 70% of ferronickel particles are larger than 40 μm, and the biggest particles are about 100 μm. The reduced pellets obtained under these conditions can be magnetically separated to obtain metallized ferronickel particles, and most of the element Ni can be recovered. The research results of the present work can give some guidelines for choosing reasonable reducing parameters for carbothermal reduction of laterite nickel ore in tall pellets bed.

Key words： laterite nickel ore tall pellets bed carbothermal reduction ferronickel particles magnetic separation

Received: 27 March 2020

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	Articles by authors
	YU Hao-bo
	JIANG Xin
	GAO Qiang-jian
	WANG Xue-bin
	LIANG Dong
	SHEN Feng-man

Cite this article:

YU Hao-bo,JIANG Xin,GAO Qiang-jian等. Experiment on carbothermal reduction of laterite nickel ore in tall pellets bed[J]. Iron and Steel, 2020, 55(11): 10-15.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20200142 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I11/10

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