RKEF工艺技术改革的几点思考

NEW THINKING ON TECHNICAL INNOVATION OF MAKING FERRONICKEL BY RKEF

分析了RKEF工艺用红土镍矿生产含镍铁水的现状及其局限性,并在实验研究的基础上提出了革新RKEF镍铁生产工艺的两种方案:(1)红土镍矿内配碳压块预还原—矿热炉熔分工艺;(2)红土镍矿内配碳压块预还原—选择性氧化—矿热炉熔分工艺。前者虽不能提高铁水的含镍量,但可以降低能耗和含镍铁水生产成本;后者可以大幅度提高铁水镍含量,降低矿热炉电耗,提高矿热炉生产效率。

The present paper analyzed the current state and limitations of the RKEF process using laterite nickel ore to produce nickel-containing molten iron.Based on the experimental research,two schemes for reforming the RKEF ferronickel production process are proposed to discuss:①Pre-reduction of laterite nickel ore with carbon briquette-submerged arc furnace melting process;(2)Pre-reduction of laterite nickel ore with carbon briquette-selective oxidationsubmerged arc furnace melting process.Although the former process cannot increase the nickel content in the molten iron,it can reduce the energy consumption and the production cost of the nickel-containing molten iron.While the latter can greatly increase the nickel content in the molten iron,reduce the power consumption of the submerged arc furnace,and improve its production efficiency.