| 含铜、铋和银的金精矿堆浸工艺综合回收试验研究 |
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| 引用本文： | 程东会,何江涛,王金祥,李国斌,沈照理.含铜、铋和银的金精矿堆浸工艺综合回收试验研究[J].现代地质,2006,20(2):322-328. |
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| 作者姓名： | 程东会 何江涛 王金祥 李国斌 沈照理 |
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| 作者单位： | 1. 中国地质大学,水资源与环境学院,北京,100083
2. 陕西省地质矿产局,堆浸技术中心,陕西,宝鸡,721300 |
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| 基金项目： | 致谢：该项目是在陕西省地质矿产局堆浸技术中心的支持下完成的,张晓燕和王立群参加了部分试验工作,分析测试由张晓燕和赵芳玲完成,在此表示感谢. |
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| 摘 要： | 采用生物氧化技术和化学方法,利用堆浸工艺分步提取,对含Au 140~150 g/t、Ag 900~1 000 g/t、B i 9.0%~10.0%、Cu14%~17%的多金属浮选金精矿的综合回收工艺进行了研究。经小型搅拌试验,确定了生物氧化浸铜—氰化浸金、NaC l-FeC l3-HC l体系(氯盐法)浸出铋和银的技术方法。通过柱浸试验,研究了利用该方法分步浸取Au、Ag、Cu和B i在堆浸工艺中的可行性。在10 t精矿的扩大试验验中,验证了柱浸试验所取得的工艺指标和参数。试验中掺入骨架材料,解决了精矿在堆浸中的渗透问题;生物氧化过程中,菌种在含高浓度铜离子浸出液中反复驯化,对铜的耐受力提高到30 g/L;在NaC l-FeC l3-HC l体系浸出B i和Ag时,用H2O2将浸出液中的Fe2+氧化成Fe3+,使浸出液能循环使用,且B i和Ag同时浸出。Au、Ag、Cu和B i的最终浸出率分别为92.98%、65.09%、45.33%和53.49%。
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| 关 键 词： | 含铜、铋和银的金精矿 堆浸工艺 综合回收 生物氧化 氯盐法 |
| 文章编号： | 1000-8527(2006)02-0322-07 |
| 收稿时间： | 12 5 2005 12:00AM |
| 修稿时间： | 03 18 2006 12:00AM |
Study on Comprehensive Recovery Technology for Gold Concentrate Containing Copper, Bismuth and Silver by Heap Leaching |
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| CHENG Dong-hui,HE Jiang-tao,WANG Jin-xiang,LI Guo-bing,SHEN Zhao-li.Study on Comprehensive Recovery Technology for Gold Concentrate Containing Copper, Bismuth and Silver by Heap Leaching[J].Geoscience——Journal of Graduate School,China University of Geosciences,2006,20(2):322-328. |
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| Authors: | CHENG Dong-hui HE Jiang-tao WANG Jin-xiang LI Guo-bing SHEN Zhao-li |
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| Institution: | 1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China ; 2. Heap Leaching Technique Center, Shaanxi Bureau of Exploration and Development of Geology and Mineral Resources, Baoji, Shaanxi 721300, China |
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| Abstract: | In this paper,the comprehensive recovery technology for gold concentrate containing Au 140-150 g/t,Ag 900-1,000 g/t,Bi 9.0%-10.0% and Cu 14%-17% was studied by heap-leaching with bacterial oxidation and chemical process.In preliminary test,the technology that bacterial oxidation leaching of Cu-cyanidation leaching of Au and NaCl-FeCl_(3)-HCl method leaching of Bi and Ag was found out by the stirred experiment.This technique was applied to leach of Au,Ag,Cu and Bi in the column experiment.The parameters in column experiment were testified to be steady and reliable in scale-up test.The penetrability of concentrate was improved by mixing the coarse sand into concentrate;The copper endurance of the bacterial was increased by acclimation,up to 30 g/L.The leaching solution of NaCl-FeCl_(3)-HCl system may be used repeatedly because Fe~(2 )becomes Fe~(3 ) in solution by the H_(2)O_(2) oxidation,and Ag,Bi may be leached simultaneously.The recovery rate of Au,Ag,Cu and Bi is 92.98%,65.09%,45.33%,53.49% respectively. |
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| Keywords: | gold concentrate containing Cu Bi and Ag heap leaching comprehensive recovery bacterial oxidation NaCl-FeCl_(3)-HCl system |
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