高铁低铜溶液磷酸盐除铁工艺  

Technique of removing iron by phosphate in high iron-low copper solution

作　　者：杨秋菊[1] 刘久清[1] 蒋彬[1] 刘海翔[1] 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2012年第10期3763-3768,共6页Journal of Central South University:Science and Technology

基　　金：湖南省自然科学基金资助项目(10JJ5007);湖南省科技计划重点项目(2010SK2011);湖南省科技厅节能减排重大专项项目(2008SK1001)

摘　　要：研究以铜萃余液为原料的高铁低铜溶液的处理过程,提出用磷酸盐除铁的工艺技术方案,得出最佳条件。实验结果表明最佳条件如下:除铁时磷酸钠加入量为理论量,pH=1.5,反应时间为20 min,双氧水加入量为5倍理论量,室温。在此条件下,Fe去除率达99%,铜损失率仅2%,可获得良好分离效果。对除铁渣进行磷酸根的回收研究,当氢氧化钠加入0.8倍理论量、反应时间为2.5 h时,磷酸根几乎可以全部回收。该工艺具有操作简便、周期短、能耗低及环境友好等优点,对高效处理工业上常见的高铁低铜溶液具有重要意义。The processes of copper raffinate as the high-iron low-copper solution were studied. The technical process of removing iron by phosphate was proposed. The results show that the optimal conditions are found, with sodium phosphate to be the theoretical amount, pH 1.5, response time 20 min, H202 5 times of theoretical amount and at room temperature. Under this condition, the optimal separation efficiency can be obtained, and the removal rates of Fe and Cu are 99% and 2%, respectively. In the research about the recovery of phosphate anions, the optimal conditions are found, with NaOH to be 0.8 times of the theoretical amount, and response time to be 2.5 h. The results indicate that the recovery rate is almost 100%. This process has the advantage of easy operation, short cycle, low energy consumption, and being environmentally friendly. Therefore, it is significant in utilization of high-iron low-copper solution.

关 键 词：铜萃余液 磷酸盐除铁法 磷酸根回收 高铁低铜溶液 

分 类 号：TF803.25[冶金工程—有色金属冶金]