由除杂铝渣碱溶碳分制备高纯Al(OH)_3  

Preparation of High Purity Al(OH)_3 from Aluminous Slag Using Alkali Extraction and Carbonation

作　　者：申晓毅[1] 常龙娇[1] 王佳东[1] 翟玉春[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2012年第9期1315-1318,共4页Journal of Northeastern University(Natural Science)

基　　金：中央高校基本科研业务费专项资金资助项目(N110402012);国家重点基础研究发展计划项目(2007CB613603)

摘　　要：以红土镍矿酸浸液的除杂铝渣为原料,经碱溶、分步碳分制备高纯Al(OH)3粉体,实验考察了除杂铝渣碱溶温度、碱溶pH值与除杂铝渣中铝溶出率的关系及碳分终点pH值、碳分温度与沉铝率之间的关系.实验得到的适宜碱溶条件为pH值14、温度90℃、时间10 min;碳分条件为碳分终点pH值9、碳分温度75℃.采用XRD,SEM,化学成分分析对所得Al(OH)3粉体进行了表征.结果表明Al(OH)3粉体晶型发育良好,颗粒不规则,表面粗糙,结构松散、多孔.Taking aluminous slag of clay nickel ore acid soaking liquid as raw material, high purity Al （OH）3 powder was successfully prepared through alkali extraction and split-step carbonation. The influences of the alkali extraction temperature and pH value on the Al dissolution rate of aluminous slag, and the pH value of carbonation end and carbonation temperature on the Al precipitation rate were also investigated, respectively. The appropriate alkali extraction conditions were pH value of 14, temperature of 90℃ and time of 10 min, and the carbonation conditions were the pH value of the carbonation end of 9 and temperature of 75 ℃, respectively. The AI（OH）3 powder was characterized using XRD, SEM and chemical component analysis. The results indicate that the crystal of AI（OH）3 powder grows well, and the particles of AI（OH）3 are irregular with rough surface, loose and porous structure.

关 键 词：除杂铝渣 碱溶 分步碳分 高纯Al(OH)3粉体 

分 类 号：TQ127.2[化学工程—无机化工]