Efficient Utilization of Nickel Laterite to Produce Master Alloy
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- 作者：Xiaodong Ma ; Zhixiang Cui ; Baojun Zhao
- 刊名：JOM
- 出版年：2016
- 出版时间：December 2016
- 年：2016
- 卷：68
- 期：12
- 页码：3006-3014
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Engineering, general; Chemistry/Food Science, general; Physics, general; Environment, general; Earth Sciences, general;
- 出版者：Springer US
- ISSN：1543-1851
- 卷排序：68
文摘
To lower the smelting temperature associated with the carbothermic reduction processing of laterite, the optimization of slag and alloy systems was investigated to enable the reduction of laterite ore in the molten state at 1723 K. The master Fe-Ni-Mo alloy was successfully produced at a lower temperature (1723 K). The liquidus of the slag decreased with the addition of oxide flux (Fe2O3 and CaO) and that of the ferronickel alloy decreased with the addition of Mo/MoO3. More effective metal–slag separation was achieved at 1723 K, which reduces the smelting temperature by 100 K compared with the current electric furnace process. A small addition of Mo/MoO3 not only decreased the melting point of ferronickel alloys but also served as a collector to aggregate the ferronickel sponges allowing them to grow larger. The FeO concentration in the slag and the nickel grade of the alloy decreased with increasing graphite reductant addition.