银离子对钴矿石微生物浸出的影响  

Effect of Silver Ion on Bioleaching of Cobalt Ore

作　　者：刘伟 张树江[1] 孙峰 黄海峰 刘畅 LIU Wei;ZHANG Shu-jiang;SUN Feng;HUANG Hai-feng;LIU Chang(School of Mining Engineering, Liaoning University of Petroleum and Chemical Technology, Fushun 113001,Liaoning, China;Institute of Metal Research of Chinese Academy of Sciences, Shenyang 110016, Liaoning, China)

机构地区：[1]辽宁石油化工大学矿业工程学院,辽宁抚顺113001 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《矿冶工程》2019年第1期82-85,共4页Mining and Metallurgical Engineering

基　　金：辽宁省科技厅自然科学基金(20170540588);辽宁省教育厅项目(L2016012);辽宁省博士科研启动基金项目(20180540057)

摘　　要：在微生物浸出钴矿石过程中添加银离子,考察了银离子对浸矿细菌生长、钴矿石生物浸出行为的影响。结果表明,银离子添加量对浸矿细菌的生长有直接影响,当添加量低于20 mg/L时,银离子对浸矿细菌的生长影响不大,但继续提高银离子浓度将对浸矿细菌的生长产生抑制作用;添加银离子能够加速含钴矿物的氧化溶解速率,显著提高金属浸出率,在矿浆浓度10%、浸出温度38℃、转速160 r/min、银离子浓度15 mg/L条件下,银离子的催化效果最佳,此时金属钴浸出率可提高28.0%,金属铜浸出率可提高26.8%。A study was conduct on the bioleaching of cobalt ore by adding silver ion for investigating effects of Ag+ on the bacterial growth and bioleaching behavior of cobalt ore. The results indicated that the bacterial growth was sensitive to the concentration of Ag+ in the culture medium. When the Ag+ concentration was less than 20 mg/ L, Ag+ had less effect on bacterial growth. However, the bacterial growth was inhibited as the concentration of Ag+ increased. Furthermore, the addition of Ag+ promoted the dissolution of minerals, thus significantly enhanced the bioleaching efficiencies of metals. It was shown that with slurry concentration of 10%, leaching temperature of 38 ℃, rotation speed at 160 r/ min, Ag+ concentration of 15 mg/ L, the leaching efficiencies of cobalt and copper could be increased by 28.0% and 26.8%, respectively, achieving a best catalytic effect of Ag+.

关 键 词：生物浸出 银离子 钴矿石 催化 

分 类 号：TF18[冶金工程—冶金物理化学]