红土镍矿湿法冶金工艺参数调整对钪走向的影响  

Scandium distribution with parameters adjustment in nickel laterite hydrometallurgical process

作　　者：孙宁磊[1] 吴筱[1] 殷书岩[1] 吕东[1] 王玮玮[1] 刘诚[1] SUN Ning-lei;WU Xiao;YIN Shu-yan;LYU Dong;WANG Wei-wei;LIU Cheng(China ENFI Engineering Corporation,Beijing 100038,China)

机构地区：[1]中国恩菲工程技术有限公司,北京100038

出　　处：《中国有色冶金》2022年第5期68-72,共5页China Nonferrous Metallurgy

摘　　要：钪在红土镍矿中含量虽然不高,但由于红土镍矿处理量大,镍提取工艺中钪副产品产量较其他钪资源高得多。本文针对红土镍矿加压酸浸(HPAL)生产氢氧化镍钴中间产品(MHP)的典型工艺流程进行统计研究,分析各个关键工艺位置参数调整对钪分配的影响。研究结果表明:HPAL浸出红土镍矿过程中钪的浸出率很高,可以认为全部进入液相;钪主要分配在一段除铁铝渣、二段除铁铝渣和MHP产品中,三者均可作为钪提取的原料,各物相中钪的分配比例与工艺pH值有关;降低一段除铁铝后液和二段除铁铝后液的pH值有利于钪在MHP产品中的富集,但会导致杂质元素铁、铝进入MHP产品,增加后续精炼处理成本,实际生产中应定量考虑杂质元素带来的后续负面影响。Although the scandium content in laterite nickel ore is not high,the scandium yield from by-product in nickel extraction process is much higher than other scandium resources,due to the large processing capacity of laterite nickel ore.In this paper,the typical process flow of nickel-cobalt hydroxide intermediate product(MHP)produced by high pressure acid leaching(HPAL)of laterite nickel ore was statistically analyzed,and the influence of parameter adjustment of each key process position on scandium distribution was studied.The results show that the leaching rate of scandium in the process of HPAL is very high,and it can be considered that all of them enter the liquid phase.Scandium is mainly distributed in the first iron and aluminum removal slag,the second iron and aluminum removal slag and MHP products.All of them can be used as raw materials for the extraction of scandium.The distribution ratio of scandium in each phase is related to pH of the process.Reducing the pH of the solution after the first and second iron and aluminum removal is beneficial to the enrichment of scandium in MHP products,but it will lead to the entry of impurity elements such as iron and aluminum into MHP products and increase the cost of subsequent refining treatment.In production,the subsequent negative effects of impurity elements should be quantitatively considered to maximize the economic benefits.

关 键 词：湿法冶金 红土镍矿 钪 高压浸出 氢氧化镍钴中间产品 

分 类 号：TF815[冶金工程—有色金属冶金] TF845.1