聚合氯化铝处理铝土矿选矿回水的试验研究  

Experimental Study on Backwater Treatment by Polyaluminum Chloride in Bauxite Flotation

作　　者：霍强[1,2] 陈致友 陈顺姣 谢建平 刘新星[1,2] 邱冠周 Huo Qiang;Chen Zhiyou;Chen Shunjiao;Xie Jianping;Liu Xinxing;Qiu Guanzhou(School of Minerals Processing and Bioengineering,Central South University,Changsha,Hunan 410083;Key Laboratory of Biohydrometallurgy,Ministry of Education,Central South University,Changsha,Hunan 410083;Pingdingshan Huaxing Engineering and Technological Serviee for Flotation Co.,Ltd.,Pingdingshan,Henan 467000)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083 [2]教育部生物冶金重点实验室,湖南长沙410083 [3]平顶山华兴浮选工程技术服务有限公司,河南平顶山467000

出　　处：《非金属矿》2018年第4期80-82,共3页Non-Metallic Mines

基　　金：国家自然科学基金(51320105006);中南大学研究生科研创新项目(1053320170205);稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SPM-201809);省部共建华南应用微生物国家重点实验室开放基金(SKYAM005-2016)

摘　　要：铝土矿选矿回水在生产系统中循环时间的延长,会使脱硅生产指标逐渐恶化;选矿回水的置换外排存在一定的环境污染风险。采用聚合氯化铝(PAC)对选矿回水进行处理,并考察脱硅指标。结果表明,选矿回水在生产系统中循环使用25 d后脱硅指标恶化严重;适量的PAC处理可降低选矿回水中絮凝剂残留,提高精矿铝硅比与精矿氧化铝回收率,延长选矿回水的循环使用时间;过量的PAC添加会造成絮凝剂含量的上升,进而导致脱硅指标再次恶化。Desilication index decreased with the increase of cycle time of the backwater in bauxite flotation. Discharge of the backwater may lead to the risk of environmental pollution. Polyaluminium chloride（PAC） is used to treat the backwater, and desilication index are examined. The results showed that flotation index that using backwater deteriorate seriously after 25 days. After treatment of backwater by moderate amount of PAC, AI/Si ratio and recovery rate of concentrates are improved and the cycle time of the backwater is increased, which may due to the decrease of the flocculant content. But the overaddition of PAC can＇t contribute to the desilication index, and probably due to the reincrease of the flocculant content in backwater.

关 键 词：聚合氯化铝 铝土矿选矿 脱硅 回水利用 

分 类 号：TD952[矿业工程—选矿]