二次铝灰酸浸制备聚合氯化铝的研究  

Study on the preparation of polyaluminum chloride by acid leaching of secondary aluminum dross

作　　者：晁曦 张廷安[1] 张宇斌 吕国志[1] 陈杨[1] CHAO Xi;ZHANG Tingan;ZHANG Yubin;LYU Guozhi;CHEN Yang(Key Laboratory of Ecological Metallurgy of Multi-metal Intergrown Ores of Ministry of Education,Northeastern University,Shenyang 110819,China;Shenyang Aluminum Magnesium Engineering Research Institute Co.,Ltd.,Shenyang 110001,China)

机构地区：[1]东北大学多金属共生矿生态化冶金教育部重点实验室,沈阳110819 [2]沈阳铝镁设计研究院有限公司,沈阳110001

出　　处：《有色金属科学与工程》2021年第5期1-9,共9页Nonferrous Metals Science and Engineering

基　　金：中央高校基本科研业务专项资金资助项目(N2025038);国家自然科学基金委员会资助项目(U1710257,51874078,U1202274);有色金属资源压力湿法冶金技术国家重点实验室项目(YY2016006);中央大学基础研究基金资助项目(N182505038);沈阳科技计划项目(17-500-8-01,Z18-5-022)。

摘　　要：二次铝灰中仍含大量铝,对其进行回收具有重要意义。文中以二次铝灰为原料,通过盐酸浸出处理后再添加铝酸钙制备聚合氯化铝(PAC),研究了HCl浓度、浸出温度、时间、液固比,铝酸钙添加量等因素的影响。综合考虑,适合二次铝灰酸浸制备聚合氯化铝的较优条件为:水洗后的二次铝灰在HCl浓度为6 mol/L,液固比为4∶1 mL/g,温度为85℃条件下酸浸2 h,此时的酸浸液中加入12 g/80 mL的铝酸钙,温度为85℃条件下反应1.5 h。该条件下酸浸过程中铝的浸出率为48.67%,且制得的液体PAC完全符合国家标准。The secondary aluminum dross still contains a large amount of metallic aluminum,and its recycling is of great significance.In this paper,secondary aluminum ash was used as the raw material.After treating it by hydrochloric acid leaching,calcium aluminate was then added to prepare polyaluminum chloride(PAC).The influencing factors such as the concentration of HCl,leaching temperature,time,liquid-solid ratio,and calcium aluminate addition amount were mainly investigated.The best conditions for preparing polyaluminum chloride by acid leaching of secondary aluminum dross were as follows:the secondary aluminum dross after washing was leached at the HCl concentration of 6 mol/L,the liquid-solid ratio of 4∶1 mL/g,at 85°C for 2 h,and then added calcium aluminate 12 g/80 mL to the acid leaching solution and reacted at 85°C for 1.5 h.Under these conditions,the leaching rate of aluminum during the acid leaching process was 48.67%,and the liquid PAC prepared was fully compliance with the national standard.

关 键 词：铝灰 酸浸 聚合氯化铝 

分 类 号：TF841[冶金工程—有色金属冶金]