氯氧化锆生产排放废硅渣中锆资源的回收  

Recovery of zirconium resources from silica residue discharged in production of ZrOCl2·8H2O

作　　者：宋静[1] 王雨[1] 曲景奎[1] 齐涛[1] 吴江[2] 陈忠锡[2] 孙小龙[2] SONG Jing;WANG Yu;QU Jingkui;QI Tao;WU Jiang;CHEN Zhongxi;SUN Xiaolong(National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;Jiangxi Kingan Hi-tech Co.,LTD.,Nanchang 330513,China)

机构地区：[1]湿法冶金清洁生产技术国家工程实验室中国科学院过程工程研究所,北京100190 [2]江西晶安高科技股份有限公司,江西南昌330513

出　　处：《再生资源与循环经济》2020年第3期25-28,共4页Recyclable Resources and Circular Economy

基　　金：国家自然科学青年基金项目(51704270);江西省重点项目(20161BBH80003);中科院重点部署项目(ZDRW-ZS-2018-1);中科院前沿科学重点研究项目(QYZDJ-SSW-JSC021)。

摘　　要：开展了氯氧化锆生产排放废硅渣中锆资源的回收工艺研究,结果表明,当废硅渣在50℃条件下溶解废碱液时,硅渣中夹带的未熔锆英砂可以沉积,回收率可达到98.5%以上。继续加热溶硅碱液,可溶锆可与硅产生凝聚,形成锆富集物沉淀,锆富集物中湿基的ZrO2含量最高可达6.5%,可溶锆的回收率在97%以上。回收得到的未熔砂和锆富集物可直接返回氯氧化锆主流程中再利用,从而实现硅渣中锆的资源化利用。The recovery process of zirconium resource from the waste silica slag discharged from the production of zirconium oxychloride was studied.The results showed that the un-reacted zircon sand can be deposited when the waste silica slag dissolved the waste alkali solution at temperature of 50℃,the recovery rate can reach over 98.5%.When the solution was heated at high temperature,the soluble zirconium can agglomerate and form precipitate,in which the content of ZrO2 is up to 6.5%,the recovery ratio is over 97%.The recovered zircon sand and zirconium precipitation can be directly returned to the process of zirconium oxychloride,which can realize the resource utilization of zirconium of silica slag.

关 键 词：氯氧化锆 废硅渣 未熔锆英砂 可溶性锆 

分 类 号：X705[环境科学与工程—环境工程]