摘要
基于新能源汽车的快速发展以及三元动力电池的高镍化发展对镍原料需求旺盛的大背景,提出红土镍矿侧吹造锍熔炼生产低镍锍工艺的研究。本文对石膏的热分解行为进行了系统的热力学研究,分析碳硫比、反应温度对CaS转化率的影响,进行石膏选择性还原硫化红土镍矿基础试验,并在此基础上进行富氧侧吹硫化红土镍矿扩大试验,总结石膏选择性还原硫化红土镍矿和富氧侧吹硫化红土镍矿的反应机制。结果表明,脱硫石膏短流程直接还原硫化红土镍矿生产低镍锍工艺可行,该工艺采用工业固废脱硫石膏作为硫化剂,可全组分利用石膏渣中的Ca、S元素,达到“固废绿色循环、资源化利用”的目的,且镍回收率大于90%,钴回收率在87%以上,硫利用率大于75%,铁回收率低于60%,可满足红土镍矿镍、钴、铁的选择性还原硫化富集回收目的。
Based on the rapid development of new energy vehicles and the strong demand for nickel raw materials due to the development of high nickel content of ternary power batteries,the research on the production of low nickel matte by laterite nickel ore side-blown matte smelting is proposed.In this paper,the thermal decomposition behavior of gypsum was systematically studied by thermodynamics,and the effects of carbon to sulfur ratio and reaction temperature on CaS conversion were analyzed.The basic test of gypsum selective reduction of laterite nickel sulfide was carried out.On this basis,the expanded test of oxygen-enriched side-blown laterite nickel sulfide was carried out,and the reaction mechanism of gypsum selective reduction of laterite nickel sulfide and oxygen-enriched side-blown laterite nickel sulfide was summarized.The results show that the process of producing low nickel matte by direct reduction of nickel sulfide laterite ore with desulfurized gypsum in a short process is feasible.The process uses industrial solid waste desulfurized gypsum as a sulfurizer,which can make full use of Ca and S elements in the gypsum slag to achieve the goal of“green recycling and resource utilization of solid waste”.The nickel recovery rate is more than 90%,the cobalt recovery rate is more than 87%,the sulfur recovery rate is more than 75%,and the iron recovery rate is less than 60%,which can meet the requirements of nickel,cobalt The purpose of selective reduction,sulfuration and enrichment of iron.
作者
陈学刚
祁永峰
CHEN Xuegang;QI Yongfeng
出处
《绿色矿冶》
2023年第1期33-39,共7页
Sustainable Mining and Metallurgy
关键词
富氧侧吹熔炼
红土镍矿
低镍锍
石膏
造锍熔炼
选择性还原硫化
oxygen enriched side-blown smelting technology
laterite nickel ore
low nickel matte
gypsum
matte smelting
selective reduction and sulfurization
作者简介
陈学刚(1982-),男,山西太原人,正高级工程师,长期从事火法冶金和侧吹冶炼工艺的设计研究工作。
