铜阳极泥常压氧化脱铜研究
|
摘要
选取某电解铜厂阳极泥进行脱铜处理,以硫酸溶液为介质,采用空气中的氧作为还原剂进行铜、砷浸出反应。采用单因素实验法探讨了鼓风时间、酸度、反应温度、液固比等因素对阳极泥中铜、砷浸出率的影响。实验结果表明:脱铜实验的最佳条件为鼓风时间5h、初始硫酸浓度180g/L、反应温度65℃,液固比3:1。在该条件下,脱铜实验渣率为61.49%,铜脱除率为85.13%、砷脱除率为52.36%、锑脱除率为1.63%,铋脱除率为7.12%,溶液中硒、金、银微量损失。
Removed copper of anode slime from an electrolytic copper plant was researched. The leaching reaction of copper and arsenic was carried out with sulfuric acid solution as medium and oxygen in air as reducing agent. The effects of blowing time, acidity,reaction temperature, liquid-solid ratio and other factors on the leaching rate of copper and arsenic in anode mud were investigated by single factor experiment. The experimental results show that the optimum conditions for copper removal are blast time of 5 h, initial sulfuric acid concentration of 180 g/L, reaction temperature of 65 ℃, liquid-solid ratio of 3:1. Under these conditions, the slag rate of copper removal experiment was 61.49%, the removal rates of copper, arsenic, antimony and bismuth were 85.13%, 52.36%, 1.63% and7.12%, respectively. The trace losses of selenium, gold and silver in the solution were observed.
Removed copper of anode slime from an electrolytic copper plant was researched. The leaching reaction of copper and arsenic was carried out with sulfuric acid solution as medium and oxygen in air as reducing agent. The effects of blowing time, acidity,reaction temperature, liquid-solid ratio and other factors on the leaching rate of copper and arsenic in anode mud were investigated by single factor experiment. The experimental results show that the optimum conditions for copper removal are blast time of 5 h, initial sulfuric acid concentration of 180 g/L, reaction temperature of 65 ℃, liquid-solid ratio of 3:1. Under these conditions, the slag rate of copper removal experiment was 61.49%, the removal rates of copper, arsenic, antimony and bismuth were 85.13%, 52.36%, 1.63% and7.12%, respectively. The trace losses of selenium, gold and silver in the solution were observed.
引文
[1]夏彬.铜阳极泥稀贵金属回收工艺及优化[J].铜业工程,2011(3):34-37.
[2]卢宜源,宾万达.贵金属冶金学[M].长沙:中南大学出版社,2004.
[3]李洪桂.湿法冶金学[M].长沙:中南大学出版社,2002.
[4]贺山明,王吉坤,徐志峰.铜阳极泥加压酸浸预处理脱铜富集贵金属[J].贵金属,2014,35(4):48-53,59.
[5]刘志东,林荔,魏欣欣.铜阳极泥直接酸浸脱铜的工艺研究[J].有色冶金设计与研究,2018,39(4):37-39.
[6]刘敬师,董广刚.铜电解阳极泥脱铜生产实践及工艺优化[J].铜业工程,2018(2):60-62,80.
[2]卢宜源,宾万达.贵金属冶金学[M].长沙:中南大学出版社,2004.
[3]李洪桂.湿法冶金学[M].长沙:中南大学出版社,2002.
[4]贺山明,王吉坤,徐志峰.铜阳极泥加压酸浸预处理脱铜富集贵金属[J].贵金属,2014,35(4):48-53,59.
[5]刘志东,林荔,魏欣欣.铜阳极泥直接酸浸脱铜的工艺研究[J].有色冶金设计与研究,2018,39(4):37-39.
[6]刘敬师,董广刚.铜电解阳极泥脱铜生产实践及工艺优化[J].铜业工程,2018(2):60-62,80.