低品位铝土矿预富集铝镓的研究  

Study on Pre-enrichment of Aluminum and Gallium from Low Grade Bauxite

作　　者：徐璐[1] 史光大[1] 李元坤[1] 钟庆文[1] 罗宇智[1] 余平[1] 

机构地区：[1]中国地质科学院矿产综合利用研究所,中国地质调查局金属矿产资源综合利用技术研究中心,成都610041

出　　处：《有色金属（冶炼部分）》2018年第3期26-29,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：中国地质调查局地质大调查项目(12120113086800)

摘　　要：采用正交试验研究某脱硫铝精矿的溶出性能,并探索从拜耳法母液中提取铝和镓富集物。结果表明,当晶种分解时间为72h,铝酸钠溶液中的Al_2O_3分解率高达86.84%,获得的Al(OH)_3产品中氧化铝含量大于62%。当吸附时间为2h,吸附温度为45℃的条件下,四级吸附后,镓的总吸附率为99.19%,再通过盐酸洗脱、中和沉淀和焙烧工艺后,镓的总回收率为82.44%,获得的富集物中Ga_2O_3含量为32.45%,可用于进一步制备高纯氧化镓产品。Digestion performance of one low grade bauxite was developed by orthogonal, and extraction of aluminum and gallium from Bayer liquor was explored. The results show that decomposition rate of A12 03 in sodium aluminate solution is 86.84% with alumina content of 62% above after seed precipitation of 72 h. After four-stage adsorption, total adsorption rate of gallium is 99.19% under the optimum conditions including adsorption time of 2 h and adsorption temperature of 45 ℃. Total recovery of gallium is 82.44% by hydrochloric acid elution, ammonia precipitation and roasting. The obtained concentrate Ga2O3 content of 32.45 % can be used to produce high purity gallium oxide products.

关 键 词：低品位铝土矿 高压溶出 氧化铝 氧化镓 预富集 

分 类 号：TF843.1[冶金工程—有色金属冶金]