1. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2. Technical Center, Laiwu Iron and Steel Group, Laiwu 271104, Shandong, China
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.
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2020, Vol. 55 
