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›› 2010, Vol. 10 ›› Issue (2): 256-262.

• 反应与分离 • 上一篇    下一篇

复杂硫化铜精矿微波活化预处理-加压浸出工艺

徐志峰 李强 王成彦   

  1. 江西理工大学材料与化学工程学院 北京矿冶研究总院冶金所
  • 收稿日期:2009-11-18 修回日期:2010-01-18 出版日期:2010-04-20 发布日期:2010-04-20
  • 通讯作者: 徐志峰

Microwave Activation Pretreatment and Pressure Leaching of Complex Copper Sulfide Concentrate

XU Zhi-feng LI Qiang WANG Chen-yan   

  1. Falculty of Material and Chemical Engineering, Jiangxi University of Science and Technology Beijing General Research Institute of Mining & Metallurgy
  • Received:2009-11-18 Revised:2010-01-18 Online:2010-04-20 Published:2010-04-20
  • Contact: XU Zhi-feng

摘要: 研究了以黝铜矿为主的复杂硫化铜精矿微波活化预处理-加压浸出工艺. 结果表明,该精矿在微波功率82 W、每批处理量95 g及辐照时间120 s条件下预处理后,矿石浸出性能显著改善. 预处理过程中未见铅、锌、硫、砷等元素挥发损失. 实验确定了微波活化铜精矿加压浸出工艺条件为:浸出温度453 K,氧分压0.6 MPa,初始硫酸浓度1.23 mol/L,液固比5 mL/g,浸出时间2.0 h,木质素磺酸钙用量为精矿质量的1.25%,搅拌速度500 r/min. 在此条件下,铜、锌、铁浸出率分别达到86.36%, 92.33%和27.64%. 加压浸出渣经高温煤油溶解单质硫后返回作浸出配矿使用,可保障有价金属铜锌收率.

关键词: 复杂铜精矿, 黝铜矿, 微波活化, 预处理, 加压浸出

Abstract: The microwave activation-pressure leaching technique of complex copper sulfide concentrate with tetrahedrite as the main mineral is studied. The results show that the leaching of complex copper sulfide concentrate is greatly improved after the microwave activation pretreatment under the following conditions: microwave power of 82 W, batch concentrate weight of 95 g, and handling time of 120 s. No loss of lead, zinc, sulfur and arsenic in the concentrate occurs during the pretreatment. The pressure leaching conditions of activated copper concentrate are further determined as follows: temperature of 453 K, oxygen partial pressure of 0.6 MPa, initial sulfuric acid concentration of 1.23 mol/L, ratio of liquid to solid of 5 mL/g, calcium lignosulphonate dosage of 1.25%(w) of the concentrate, leaching time of 2.0 h, and agitation speed of 500 r/min. Under these conditions, the extraction rate of copper, zinc and iron is achieved at 86.36%, 92.33% and 27.64% respectively. The leaching residues may return to the rationing of leaching materials for high recovery of copper and zinc after the residues are processed by high-temperature kerosene for deprivation of elemental sulfur.

Key words: complex copper concentrate, tetrahedrite, microwave activation, pretreatment, pressure leaching

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