离子沉淀浮选法回收废水中的Cu^(2+)  

Recovery of Cu^(2+)from wastewater by ion precipitation flotation

作　　者：高恩霞 周宇照[3] 闫平科 张明慧 蒋曼[1] 王发刚[4] GAO Enxia;ZHOU Yuzhao;YAN Pingke;ZHANG Minghui;JIANG Man;WANG Fagang(School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255049,China;Shandong Zhaoyuan Technology Company Limited,Yantai 265400,China;CBMI Construction Company Limited,Beijing 100176,China;School of Materials Science and Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255049 [2]山东招远科技有限公司,山东烟台265400 [3]中材建设有限公司,北京100176 [4]山东理工大学材料科学与工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2022年第5期1-7,共7页Journal of Shandong University of Technology:Natural Science Edition

基　　金：国家自然科学基金项目(52104259);山东省自然科学基金项目(ZR2020QB192,ZR2018BEE015)。

摘　　要：研究了离子沉淀浮选法回收模拟废水中Cu^(2+)的工艺,重点考察了丁基黄药、十二烷基三甲基溴化铵及其组合捕收剂对浮选指标的影响,结果表明:在Cu^(2+)浓度高达2000 mg/L的模拟废水中加入沉淀剂Na_(2)S·9H_(2)O,当n(S^(2-))∶n(Cu^(2+))为1.1∶1时,废水中的Cu^(2+)基本沉淀完全,生成的黑色CuS沉淀可采用浮选法回收。浮选过程中,以十二烷基三甲基溴化铵为捕收剂时,浮选后的柱内水损失率低、泡沫产品中CuS沉淀回收率高,离子沉淀浮选效果比以丁基黄药为捕收剂时好。以丁基黄药和十二烷基三甲基溴化铵为组合捕收剂,加入少量2#油为起泡剂时,还可以明显减少浮选过程中的水量损失、提高选别指标、降低捕收剂用量。当以100 mg/L丁基黄药、100 mg/L十二烷基三甲基溴化铵和38 mg/L的2#油为浮选药剂时,柱内水损失率仅为3.75%,泡沫产品中CuS沉淀回收率可高达90.21%。The recovery of Cu^(2+)from simulated wastewater by ion precipitation flotation was studied.The effects of butyl xanthate,dodecyl trimethylammonium bromide and their combined collectors on the flotation indexes were investigated.The results showed that when precipitator Na_(2)S·9H_(2)O was added in simulated wastewater with the concentration of Cu^(2+)as high as 2000mg/L,the black CuS precipitates were generated,which could be recovered by flotation method.When n(S^(2-))∶n(Cu^(2+))was 1.1∶1,Cu^(2+)in the wastewater was almost completely precipitated.In the flotation process,compared with butyl xanthate collector,in the case of using dodecyltrimethylammonium bromide as collector,the water loss rate of simulated wastewater was lower,the recovery of CuS precipitation in foam product was higher,and the flotation effect of ion precipitation was better.When butyl xanthate and dodecyl trimethylammonium bromide were used as the combined collector,adding a small dosage of 2#oil as the foaming agent could further significantly reduce the water loss rate in flotation process,improve the flotation index and reduce the dosage of collector.When 100 mg/L butyl xanthate,100 mg/L dodecyl trimethylammonium bromide and 38 mg/L 2#oil were used as flotation agents,the water loss rate of simulated wastewater was only 3.75%,and the recovery of CuS precipitation in foam products could reach as high as 90.21%.

关 键 词：离子沉淀浮选 Cu^(2+)废水 CuS沉淀 组合药剂 

分 类 号：TD923[矿业工程—选矿] X703[环境科学与工程—环境工程]