摘要
低品位红土镍矿在常压下用硫酸浸出后,浸出液与浸出渣中的镍、铁、镁、硅等有价元素可进行综合利用。本文首先采用常压酸浸对低品位红土镍矿进行处理,然后通过各工艺环节的试验研究有价金属综合利用的工艺流程,明确最佳工艺参数,实现低品位红土镍矿高附加值资源化综合利用。其间,可利用黄钠铁矾法对红土镍矿浸出液沉铁;过滤渣焙烧后获得Fe_(2)O_(3)矿粉,它可作为钢铁原料或深加工为铁红等产品;除铁后液利用化学沉淀法进行处理,分别得到氢氧化镍与氢氧化镁产品;过滤后的硫酸钠溶液经过净化后可送回配料环节循环使用;浸出渣则通过碱浸处理、碳化分解得到高纯度SiO_(2)产品。
After leaching low-grade laterite nickel ore with sulfuric acid at atmospheric pressure,the valuable elements such as nickel,iron,magnesium,and silicon in the leaching solution and leaching residue can be comprehensively utilized.This paper first uses atmospheric acid leaching to treat low-grade laterite nickel ore,and then studies the process flow of comprehensive utilization of valuable metals through experiments in various process links,clarifies the optimal process parameters,and realizes the comprehensive utilization of low-grade laterite nickel ore with high added value as a resource.During this period,the sodium jarosite method can be used to precipitate iron from the leaching solution of laterite nickel ore;after roasting the filtered slag,Fe2O3 mineral powder is obtained,which can be used as steel raw material or further processed into products such as iron red;the solution after iron removal is treated by using chemical precipitation method to obtain nickel hydroxide and magnesium hydroxide products,respectively;the filtered sodium sulfate solution can be sent back to the batching process for recycling after purification;the leaching residue is then subjected to alkali leaching and carbonization decomposition to obtain high-purity SiO2 products.
作者
司金凤
李丙亮
SI Jinfeng;LI Bingliang(School of Metallurgy and Automotive Engineering,Shandong Vocational College of Industry,Zibo 256414,China)
出处
《中国资源综合利用》
2023年第9期5-8,12,共5页
China Resources Comprehensive Utilization
基金
2019年淄博市重点研发计划(政策引导类)项目“物联网技术在粉末冶金企业中的应用研究”(2019ZC010177),主持人为李丙亮。
关键词
低品位红土镍矿
常压酸浸
黄钠铁矾
碱浸处理
化学沉淀
low-grade laterite nickel ore
atmospheric acid leaching
sodium jarosite
alkali leaching
chemical precipitation
