四氯乙烯在锌精矿浸出中的作用研究  

The Effects of Tetrachloroethylene in Leaching Sphalerite

作　　者：彭鹏[1] 谢慧琴[1] 卢立柱[1] 

机构地区：[1]中国科学院过程工程研究所

出　　处：《矿冶工程》2005年第1期44-46,共3页Mining and Metallurgical Engineering

基　　金：国家自然科学基金资助项目 (批准号 :2 0 2 760 74)

摘　　要：实验研究了锌精矿在H2 SO4 HNO3体系中浸出过程。考察了浸出温度、液 固比、四氯乙烯的加入对锌浸出的影响。通过扫描电镜分析比较了浸出前矿粒、普通浸出矿渣和加入四氯乙烯后浸出矿渣的表面形貌。结果表明 ,在 85℃ ,氧气压力为 0 .1MPa ,H2 SO4 浓度为 2 .0mol L ,HNO3浓度为 0 .2mol L ,液 固比为 10∶1条件下 ,在 2 0 0mL浸出液中加入 10mL四氯乙烯萃取硫磺的同时 ,锌的浸出率在 3h内达到 99.6% ,与普通浸出相比 ,浸出时间缩短了 5 0 %。可见 。The leaching of sphalerite concentrate in H_2SO_4-HNO_3 was investigated. The effects of leaching temperature, liquid/solid ratio and addition of tetrachloroethylene on the leaching of zinc were studied. By JEM-6700F Field Emission Scanning Electron Microscope an analysis was made on the appearances of the sphalerite particles before leaching, the residues of common leaching and the residues of leaching with addition of tetrachloroethylene. The results indicate that the leaching rate of zinc reaches to 99.6% after 3 h leaching at 85 ℃, under 0.1 MPa O_2, in a 200 mL leach liquor containing 2.0 mol/L H_2SO_4 and 0.2 mol/L HNO_3 with 10∶1 liquid/solid ratio when 10 mL tetrachloroethylene was added into the liquor for sulphur leaching. The leaching time of zinc is 50% shorter than the common leaching without tetrachloroethylene. Obviously, the addition of tetrachloroethylene greatly increases the leaching rate of zinc.

关 键 词：锌精矿 硫酸-硝酸 四氯乙烯 浸出 

分 类 号：TF111.31[冶金工程—冶金物理化学]