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| 缅甸某高硫高砷金矿碱浸预处理工艺研究 |
| Study on the alkaline leaching pretreatment technology of a high-sulfur and high-arsenic gold mine in Myanmar |
| Received:January 06, 2021 |
| DOI： |
| 中文关键词: 有色金属冶金 高硫高砷 金矿 碱浸 |
| 英文关键词: non-ferrous metallurgy high sulfur and high arsenic gold ore alkaline leaching |
| 基金项目:国家自然科学联合基金(U1802252) |
| Author Name | Affiliation | E-mail | | ZHANG Wen-jie* | Faculty of Land and Resources Engineering, Kunming University of Science and Technology,Yunnan Province Engineering Research Center for Reutilization of Metal Tailings Resources, Kunming 650093, China | 18088266534@163.com | | ZHAO Yu* | Faculty of Land and Resources Engineering, Kunming University of Science and Technology,Yunnan Province Engineering Research Center for Reutilization of Metal Tailings Resources, Kunming 650093, China | | | TONG Xiong* | Faculty of Land and Resources Engineering, Kunming University of Science and Technology,Yunnan Province Engineering Research Center for Reutilization of Metal Tailings Resources, Kunming 650093, China | | | ZHANG Sheng-dong* | Faculty of Land and Resources Engineering, Kunming University of Science and Technology,Yunnan Province Engineering Research Center for Reutilization of Metal Tailings Resources, Kunming 650093, China | | | XIE Xian* | Faculty of Land and Resources Engineering, Kunming University of Science and Technology,Yunnan Province Engineering Research Center for Reutilization of Metal Tailings Resources, Kunming 650093, China | |
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| 中文摘要: |
| 针对缅甸某高硫高砷金矿中毒砂和黄铁矿包裹金浸出率低的问题，采用碱浸预处理工艺处理该矿石。确定了磨矿时间、固液比等工艺条件，重点考察预处理过程中的pH、催化剂ZNT用量、时间、氧化剂用量等因素对金浸出率的影响。结果表明，用NaOH调节pH=13，磨矿细度?38 μm含量占90%，再添加10 kg/t催化剂ZNT，40 kg/t氧化剂H2O2，在固液比1:6的条件下预处理12 h，能有效去除包裹金的硫和砷。预处理后的矿样在浸金药剂(1#金虎提金剂) 20 kg/t、矿浆pH=13的条件下浸出24 h，金浸出率提高了近30个百分点。 |
| 英文摘要: |
| Aiming at the low leaching rate of arsenopyrite and pyrite-coated gold in a high-sulfur and high-arsenic gold mine in Myanmar, an alkaline leaching pretreatment process were developed to treat the gold mine. The effects of grinding time, solid-liquid ratio, pretreatment pH, catalyst ZNT dosage, pretreatment time, oxidant dosage and other factors on the gold leaching rate were investigated. The results showed that sulfur and arsenic encapsulating gold were effectiviely removed under the following conditions: adjusting pH=13 using NaOH , the grinding fineness -38 μm content accounted for 90%, adding 10 kg/t of catalyst ZNT and 40 kg/t of oxidant H2O2, pretreating with 1:6 of solid-liquid ratio for 12 h. After pretreatment, The pre-treated ore samples were leached for 24 hours under the conditions of 20 kg/t of gold leaching agent (1# Jinhu gold extracting agent) and slurry pH=13, and the gold leaching rate increased by nearly 30 percentage points. |
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