Abstract：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 tall pellets bed was carried out. Also, the influence and mechanism of reducing temperature, reducing time and 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 45min. Under these conditions, 70% of ferronickel particles are +40μm, and the biggest particles are about 100μm. The reduced pellets obtained under these conditions can be magnetic 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.
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2020, Vol. 55 
