铜电解液含铋复盐沉淀法脱砷新工艺研究  

Arsenic Removal from Copper Electrolyte by Precipitation with Complex Bismuth Salts as Precipitant

作　　者：黄志华[1,2] 金凯[1] 安登极 孙欣 袁文彬 覃文庆 张雁生[1] HUANG Zhi-hua;JIN Kai;AN Deng-ji;SUN Xin;YUAN Wen-bin;QIN Wen-qing;ZHANG Yan-sheng(School of Mineral Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Zijin Mining Group Ltd,Shanghang 364200,Fujian,China;Changsha Research Institute of Mining and Metallurgy Co Ltd,Changsha 410012,Hunan,China)

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]紫金矿业集团股份有限公司,福建上杭364200 [3]长沙矿冶研究院有限责任公司,湖南长沙410012

出　　处：《矿冶工程》2021年第2期95-98,共4页Mining and Metallurgical Engineering

摘　　要：针对目前诱导法脱砷产能不足、脱除率低的问题,开发了电解液含铋复盐沉淀法脱砷新工艺,优化沉淀条件为:含铋复盐沉淀剂用量Bi/As摩尔比1∶1、温度55℃、时间30 min,此时电解液中铜、砷、锑沉淀率分别为4.75%、63.62%和91.30%;在NaOH浓度50 g/L、液固比5∶1、温度80℃,时间0.5 h条件下,碱浸砷浸出率可达78.98%;沉淀剂再生性能良好,可循环使用;碱浸液经苛化再生循环利用,经过一次碱浸-苛化,NaOH损失率仅为2.7%。Aiming at the problems of insufficient production capacity and low removal rate of arsenic by induction method,a new precipitation process with the complex bismuth salts as the precipitant was developed for removing arsenic in electrolyte.It is shown that the precipitation rates of copper,arsenic and antimony in electrolyte are 4.75%,63.62%and 91.30%,respectively,after the precipitation process proceeds at 55℃for 30 min by adding this complex bismuth-containing precipitant with Bi/As in a molar ratio of 1∶1,and the alkali leaching process at 80℃for 0.5 h with NaOH concentration of 50 g/L and liquid-solid ratio of 5∶1 can result in the leaching rate of arsenic up to 78.98%.The precipitant has a good regeneration performance and can be recycled.And the alkali leaching solution can also be recycled after causticization.After one cycle of alkali leaching and causticization,NaOH shows the loss rate of only 2.7%.

关 键 词：铜电解液 含铋复盐 脱砷 净化 苛化 

分 类 号：TF111[冶金工程—冶金物理化学]