煤系高硫稀有金属复合矿选硫尾矿综合利用实验  

Comprehensive Utilization of Sulfur Separation Tailings of High Sulfur Rare Metal Complex Ore in Coal Measure

作　　者：冯雪茹 刘述平[1] 李超[1] Feng Xueru;Liu Shuping;Li Chao(Institute of Multipurpose Utilization of Mineral Resources,CAGS,Sichuan Rare Earth Technology Innovation Center,Applied Technology Innovation Center of Rare Earth Resources of Chinese Geological Survey,Chengdu,Sichuan,China)

机构地区：[1]中国地质科学院矿产综合利用研究所,四川省稀土技术创新中心,中国地质调查局稀土资源应用技术创新中心,四川成都610041

出　　处：《矿产综合利用》2023年第4期169-173,共5页Multipurpose Utilization of Mineral Resources

基　　金：中国地质调查局地质大调查项目(DD20221697);四川省科技计划项目(2021YFG0236)。

摘　　要：这是一篇冶金工程领域的论文。对重庆某地区煤系高硫稀有金属复合矿选硫尾矿进行综合利用实验研究,为回收铝、硅、稀土、铌等有价元素提供了可行依据。对该选硫尾矿进行了硫酸常压浸出提铝实验,通过条件实验得到适宜浸出条件为:硫酸浓度70%、浸出时间3 h、浸出液固比3、浸出温度≥135℃。该条件下Al_(2)O_(3)浸出率可达87.25%。酸浸液可用于制备水处理剂硫酸铝产品;酸浸渣通过NaOH浸出转化后富集硅、稀土、铌等有价元素,可得到SiO_(2)含量达85 g/L以上的碱浸液,用于制取硅酸钠产品;稀土、铌元素经过富集后,在碱浸渣中稀土氧化物(TREO)总量为1820 g/t,Nb含量为274 g/t,可用作回收稀土、铌的原料。This is an essay in the field of metallurgical engineering.Comprehensive utilization of sulfur separation tailings from a coal measure high sulfur rare metal complex ore in Chongqing area was studied which provided a feasible basis for the recovery of valuable elements such as aluminum,silicon,rare earth and niobium.The experimental results show that the optimum leaching conditions are as follows:sulfuric acid concentration 70%,leaching time 3 h,leaching liquid to solid ratio 3,leaching temperature≥135℃Under these conditions,the Al_(2)O_(3) leaching rate can reach 87.25%.Acid leaching solution can be used to prepare aluminum sulfate as a water treatment agent.SiO_(2) can be obtained from acid leaching residue after enrichment of valuable elements such as silicon,rare earth and niobium by NaOH leaching.The content of more than 85 g/L alkali leaching solution,used for the preparation of sodium silicate products;After enrichment of rare earth and niobium elements,the content of TREO and Nb in alkali leaching residue is1820 g/t and 274 g/t,which can be used as raw materials for the recovery of rare earth and niobium elements.

关 键 词：冶金工程 选硫尾矿 综合利用 浸出 硫酸铝 富集 

分 类 号：TD981[矿业工程—选矿] TF821[冶金工程—有色金属冶金]