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›› 2008, Vol. 8 ›› Issue (6): 1085-1091.

• 反应与分离 • 上一篇    下一篇

高硅高铁含铜渣氧压酸浸过程

金炳界 杨显万 沈庆峰   

  1. 昆明理工大学材料与冶金工程学院
  • 收稿日期:2008-06-27 修回日期:2008-10-17 出版日期:2008-12-20 发布日期:2008-12-20
  • 通讯作者: 金炳界

Investigation on Pressure Oxidative Leaching of Copper Slag with High Iron and Silicon Content

JIN Bing-jie YANG Xian-wan SHEN Qing-feng   

  1. Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology
  • Received:2008-06-27 Revised:2008-10-17 Online:2008-12-20 Published:2008-12-20
  • Contact: JIN Bing-jie

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摘要： 对火法炼铅产高硅高铁含铜渣进行了氧压硫酸浸出过程研究. 结果表明，浸出时间、氧分压、酸量、浸出温度和搅拌速度对Cu的浸出率和浸出液中Fe含量有显著影响，溶液初始含Cu2+量对Cu浸出率影响不明显. 最佳工艺条件为：时间2 h，氧分压0.8 MPa，硫酸浓度46.6 g/L，温度(150±2)℃，搅拌速度600 r/min，复合絮凝剂A用量30~100 g/m3. 在该条件下，Cu浸出率>95%，浸出液中Fe<5 g/L，硫转化率20%~30%，料浆过滤速度约0.8 m3/(m2×h).

关键词: 铜渣, 高硅高铁, 氧压酸浸, 过滤, 铜, 回收

Abstract: The pressure oxidative leaching of copper slag with high iron and silicon content was studied systematically. The results show that the effects of leaching time, oxygen partial pressure, acid dosage, leaching temperature and agitation rate are predominant, and the initial Cu2+ concentration not remarkable. The optimal technological conditions are obtained: leaching time 2 h, oxygen partial pressure 0.8 MPa, acid concentration 46.6 g/L, temperature (150±2)℃, agitation speed 600 r/min and flocculation composite A 30~100 g/m3. Under these conditions, the extraction rate of Cu is over 95%, the concentration of Fe less than 5 g/L, the yield of S 20%~30% of total sulfur mass, and the filtration rate of magma about 0.8 m3/(m2×h).

Key words: copper slag, high iron and silicon, pressure oxidative leaching, filtration, copper, recovery

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