从低品位含铝矿石酸浸液中回收铝  

Recovery of aluminum from acid leaching solution of low-grade aluminum bearing ore

作　　者：蒋朋 高利坤[2] 马方通 饶兵[2] 沈海榕 JIANG Peng;GAO Li-kun;MA Fang-tong;RAO Bing;SHEN Hai-rong(State Key Laboratory of Clean and Use of Complex Nonferrous Metal Resources,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学复杂有色金属资源清洁利用国家重点实验室,昆明650093 [2]昆明理工大学国土资源工程学院,昆明650093

出　　处：《矿冶》2020年第2期54-61,共8页Mining And Metallurgy

摘　　要：从低品位含铝矿石湿法处理过程综合回收铝,实现低品位含铝矿物的资源化或高值化利用具有重要的现实意义。以硫酸浸出低品位含铝锐钛矿原矿得到的高铝铁浸出溶液为研究对象,采用硫酸铝铵结晶沉铝—树脂吸附除铁—焙烧联合工艺制备高纯Al2O3。结果表明,在铝离子初始浓度0.70 mol/L、NH 4+/Al 3+摩尔比1.2、结晶终点温度20℃条件下,以300 r/min的速度搅拌30 min,可获得晶体纯度95.31%,铝的回收率88.19%,夹杂铁的含量1.39%的NH 4 Al(SO 4)2·12H 2 O粗产品。将NH 4 Al(SO 4)2·12H 2 O粗产品通过两次重结晶和一次树脂吸附除铁,最终在1300℃条件下焙烧可得到纯度为99.99%的Al2O3。It is of great practical significance to comprehensively recover aluminum from the low-grade aluminum ore wet processing process to realize recycling or high value utilization of low-grade aluminum-containing minerals.The high aluminum and iron leaching solution obtained by sulfuric acid leaching of low-grade aluminum-containing anatase ore was used as the research object,and high-purity Al 2 O 3 was prepared by Crystallization of ammonium aluminum sulfate—Removal of iron with resin adsorption—Calcination combined process.The results show that under the condition of initial concentration of aluminum ion of 0.70 mol/L,NH^4+/Al^3+molar ratio of 1.2,crystallization end point temperature of 20℃,and stirring speed of 300 r/min for 30min,NH4Al(SO4)2·12H2O crude product with a purity of 95.31%was obtained.The aluminum recovery rate was 88.19%,and the iron content was 1.39%.Then,the crude NH4Al(SO4)2·12H2O product was subjected to iron removal by two recrystallizations and primary resin adsorption,and finally calcined at 1300℃to obtain Al2O3 with a purity of 99.99%.

关 键 词：低品位铝资源 高铝铁酸溶液 十二水硫酸铝铵 高纯氧化铝 

分 类 号：TD925.5[矿业工程—选矿]