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| 水热浸出-浮选综合回收铅银渣中金银实验研究 |
| Experimental Research on Comprehensive Recovery of Gold and Silver from Lead-Silver Residue by Hydrothermal Leaching-Floatation |
| Received:May 15, 2015 |
| DOI： |
| 中文关键词: 有色金属冶金 铅银渣 水浸 浮选 T19 硫酸铜 酯-30 |
| 英文关键词: nonferrous metallurgy lead-silver residue hydrothermal leaching flotation T19 copper sulfate Ester-30 |
| 基金项目: |
| Author Name | Affiliation | E-mail | | GUO Yanhua | Northwest Institute of Mining and Metallurgy, Baiyin 730900, Gansu, China | gyh19861109@163.com | | SUN Yunli | Northwest Institute of Mining and Metallurgy, Baiyin 730900, Gansu, China | | | GUO Haining | Northwest Institute of Mining and Metallurgy, Baiyin 730900, Gansu, China | | | YANG Junlong | Northwest Institute of Mining and Metallurgy, Baiyin 730900, Gansu, China | | | LIAO Xuezhen | Northwest Institute of Mining and Metallurgy, Baiyin 730900, Gansu, China | | | PENG Jiancheng | Northwest Institute of Mining and Metallurgy, Baiyin 730900, Gansu, China | |
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| 中文摘要: |
| 为了提高资源利用效率，实现二次资源综合利用，对铅银渣进行了实验研究。铅银渣中银品位为245 g/t，金品位为1.52 g/t，金、银含量均较高。银的赋存状态研究表明，银主要以再造矿物铜蓝、硫化银混合相存在。结合银的赋存状态进行流程探索，确定采用水热浸出-浮选工艺流程。条件实验研究表明，液固比为2:1，浸出温度为70℃，浸出时间为2 h进行水热浸出，金、银在渣中富集率较高。当磨矿细度-0.044 mm占85%，粗选T19用量为4000 g/t，硫酸铜用量为600 g/t，酯-30用量为500 g/t时，经过一次粗选、两次精选、一次扫选的闭路实验流程，可获得银品位为3805 g/t，银回收率为86.82%的银精矿，银精矿中金的品位为25.8 g/t，金回收率为94.96%的较好指标，实现了铅银渣的综合回收。 |
| 英文摘要: |
| In order to improve the efficiency of resource utilization and realize the comprehensive utilization of secondary resources, the present tests were carried out to recover gold and silver effectively from lead-silver residue as a secondary resource. The content of gold and silver in the lead-silver residue was high, with the silver being at 245 g/t in the form of copper blue and silver sulfide minerals，and gold being at 1.52 g/t. Based on the state of silver, a hydrothermal leaching-flotation process was used. The involved condition experiments showed that a great enrichment rate of gold and silver in the slag was achieved when the liquid-solid ratio was 2:1 at 70℃ for 2 h in hydrothermal leaching procedure. The flotation included grinding, one roughing, two cleaning, one scavenging of aclosed-circuit process. The chemicals used in flotation procedure were T19 at a dose of 4000 g/t, copper sulfate at a dose of 600 g/t, ester-30 at a dose of 500 g/t. After leaching-flotation, silver was concentrated to a content of 3805 g/t with a recovery rate of 86.82% while gold to a content of 25.8 g/t with the recovery being up to 94.96%. |
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