New technology for comprehensive utilization of aluminum-chromium residue from chromium salts production

作     者：李小斌 齐天贵 江新民 周秋生 刘桂华 彭志宏 韩登仑 张忠元 杨昆山 

作者机构：School of Metallurgical Science and Engineering Central South University Changsha 410083 China Gansu Jinshi Chemical Engineering Corporation Ltd. Zhangye 734000 China 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2008年第18卷第2期

页      面：463-468页

核心收录：

学科分类：080602[工学-钢铁冶金] 0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 

主　　题：铝 铬 冶金技术 合金 羟化物 

摘      要：Colloidal aluminum-chromium residue(ACR)was mass-produced in chromate production process,and the large energy consumption and high recovery cost existed in traditional methods of utilizing such *** overcome those problems,a new comprehensive method was proposed to deal with the ACR,and was proven valid in *** the new process,the chromate was separated firstly from the colloidal ACR by ripening and washing with additives,by which more than 95%hexavalent chromium was *** chromium-free aluminum residue(CFAR),after properly dispersed,was digested at 120-130℃and more than 90% alumina can be *** then the pregnant aluminate solution obtained from digestion was seeded to precipitate aluminum *** new method can successfully recover both alumina and sodium chromate,and thus realize the comprehensive utilization of ACR from chromate industry.