摘要
以某金矿氰化尾渣浮选得到的铜物料为原料,采用直接浸出-萃取-电积-七水硫酸锌制备的新工艺,得到了电铜、七水硫酸锌、硫磺与贵渣等产品。研究了铜、锌直接浸出的最佳工艺条件,结果表明,粒度为-0.043 3 mm占97%的铜物料在H2SO4240 g/L,HNO325 g/L的酸度下,控制浸出温度为116.8℃,液固比为5.94∶1,氧分压为0.5 MPa的条件下浸出360 min,铜的总浸出率高达94.53%。该工艺铜、锌、银和金的回收率分别高达88%、93.1%、90%和80%,有价元素回收率高,较焙烧-萃取-电积流程省去了焙烧和制酸系统,从而大大节减了基建投资,工业实用性强。
The copper material, obtained from the flotation of cyanide residues in a mine, was treated by a new process of direct leaching-extraction-electrowinning-production of zinc sulfate heptahydrate technology. The products are copper, zinc sulfate heptahydrate, sulfur and valuable slag. The results show that the optimal conditions were as follows：the copper concentrate which size of -0. 0433 mm accounted for 97% was leached in the acidity of H2SO4 240 g/L,HNO3 25 g/L,and control the leaching temperature of 116.8 % ,liquid-solid ratio L/S of 5.94：1 ,partial pressure of oxygen 0. 5 MPa and leaching 360 min. As a result,the total leaching rate of Cu was high than 94.53%, and the recovery rates of Cu,Zn, Ag and Au were 88% ,93.1% ,90% and 80% respectively in this process. The systems of roasting and acid were eliminated in this process comparing with the roasting-extraction-electrowinning technology, thus reducing infrastructure investment greatly. This technology has a high rate of elements recovery and a strong industrial practicability.
出处
《湖南有色金属》
CAS
2016年第1期30-34,共5页
Hunan Nonferrous Metals
关键词
氰化尾渣
铜物料
直接浸出
萃取
电积
cyanide residues
copper material
direct leaching
extraction
electrowinning
