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广西某低品位金矿氰化浸出助浸剂实验研究

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苑林松, 代淑娟, 苏馨, 余鑫, 岳翔, 刘春琦. 广西某低品位金矿氰化浸出助浸剂实验研究[J]. 矿产综合利用, 2023, 44(2): 63-69. doi: 10.3969/j.issn.1000-6532.2023.02.012
引用本文: 苑林松, 代淑娟, 苏馨, 余鑫, 岳翔, 刘春琦. 广西某低品位金矿氰化浸出助浸剂实验研究[J]. 矿产综合利用, 2023, 44(2): 63-69. doi: 10.3969/j.issn.1000-6532.2023.02.012
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Yuan Linsong, Dai Shujuan, Su Xin, Yu Xin, Yue Xiang, Liu Chunqi. Experimental Study on Cyanidation Leaching of a Low-grade Gold Mine in Guangxi[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(2): 63-69. doi: 10.3969/j.issn.1000-6532.2023.02.012
Citation: Yuan Linsong, Dai Shujuan, Su Xin, Yu Xin, Yue Xiang, Liu Chunqi. Experimental Study on Cyanidation Leaching of a Low-grade Gold Mine in Guangxi[J]. Multipurpose Utilization of Mineral Resources, 2023, 44(2): 63-69. doi: 10.3969/j.issn.1000-6532.2023.02.012
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广西某低品位金矿氰化浸出助浸剂实验研究

  • 1.

    辽宁科技大学矿业工程学院，辽宁　鞍山　114051

  • 2.

    攀钢集团矿业有限公司设计研究院，四川　攀枝花　617036

  • 基金项目: 国家自然科学基金（51574146）
详细信息
    作者简介: 苑林松（1997-），男，硕士，研究方向为硫化矿浮选
    通讯作者: 代淑娟（1967-），女，博士，教授，研究方向为难处理金选冶及菱镁矿选矿研究

  • 中图分类号: TD952

Experimental Study on Cyanidation Leaching of a Low-grade Gold Mine in Guangxi

  • 1.

    School of Mining Engineering, University of Science and Technology Liaoning, Anshan, Liaoning, China

  • 2.

    Design and Research Institute of Pangang Group Mining Co. Ltd., Panzhihua, Sichuan, China

More Information

    摘要

  • 广西某低品位金矿石含金量为1.29 g/t，脉石矿物以石英为主，有色金属铜、铅、锌等及有害元素砷的含量极低。对该矿石进行氰化浸金实验研究，分别考查磨矿细度、溶液pH值、氰化物用量、搅拌转速、浸出时间对金浸出效果的影响；通过单矿物氰化助浸实验，确定多种助浸效果较好的助浸剂，并按同一比例混合，获得了三种新型助浸剂A、B、C；针对广西某低品位金矿石，进行氰化浸出助浸实验。结果表明，矿样细度-0.074 mm 93.27%，溶液pH值为10.5，氰化钾用量为4 kg/t，搅拌转速为1500 r/min，浸出时间为24 h的实验条件下，金的浸出率为92.58%；而氰化钾用量减少至3 kg/t，其余条件不变的情况下，加入新型助浸剂A浸出18 h后，金的浸出率可达93%。新型助浸剂的加入有效地提高了金的浸出率，同时将氰化物的损耗降低了25%，浸出时间缩短了6 h以上。

    Gold content of a low-grade gold ore in Guangxi is 1.29 g/t, the gangue minerals are mainly quartz, and the content of non-ferrous metals such as copper, lead, zinc and other harmful elements arsenic is extremely low. The cyanide gold leaching test was carried out on the ore, and the effects of grinding fineness, pH value of solution, cyanide dosage, stirring speed and leaching time on the gold leaching effect were investigated respectively; The leaching aids with better leaching effect were mixed in the same proportion, and three new leaching aids A, B and C were obtained; for a low-grade gold ore in Guangxi, a cyanide leaching aid leaching test was carried out. The results show that the sample fineness of -0.074 mm accounts for 93.27%, the pH value of the solution is 10.5, the dosage of potassium cyanide is 4 kg/t, the stirring speed is 1500 r/min, and the leaching time is 24 h, the gold leaching rate is 24 h. 92.58%; the amount of potassium cyanide was reduced to 3 kg/t, and the other conditions remained unchanged, after adding the new leaching aid A for 18 h, the leaching rate of gold could reach more than 93%. The addition of the new leaching aid effectively improves the leaching rate of gold, reduces the loss of cyanide by 25%, and shortens the leaching time by more than 6 h.

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  • 图 1  磨矿细度对金的浸出率的影响

    Figure 1. 

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    图 2  溶液pH值对金的浸出率的影响

    Figure 2. 

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    图 3  氰化钾用量对金的浸出率的影响

    Figure 3. 

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    图 4  搅拌转速对金的浸出率的影响

    Figure 4. 

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    图 5  浸出时间对金的浸出率的影响

    Figure 5. 

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    图 6  过氧化氢和柠檬酸三钠助浸氰化浸出效果

    Figure 6. 

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    图 7  EDTA-4Na和氯化羟胺助浸氰化浸出效果

    Figure 7. 

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    图 8  EDTA-4Na和硝酸铅助浸氰化浸出效果

    Figure 8. 

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    图 9  助浸剂A、B、C对金的浸出率的影响

    Figure 9. 

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    图 10  助浸剂助浸氰化浸金后的红外光谱

    Figure 10. 

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    表 1  广西某金矿石X射线荧光光谱分析/%

    Table 1.  X-ray fluorescence spectrum analysis of a gold ore in Guangxi

    Na2OMgOAl2O3SiO2P2O5SO3K2OCaOTiO2Cr2O3Fe2O3CuOAs2O3BaOAgPbO
    0.0320.1756.92690.130.0270.1180.8150.1330.0990.0111.4520.0060.0020.0210.0030.012
    下载: 导出CSV

    表 2  广西某金矿石化学多元素分析/%

    Table 2.  Multi-element analysis of petrochemistry of a gold mine in Guangxi

    Au/(g·t-1)ZnTFeMgOAl2O3CaOSSiO2
    1.290.0051.2210.1646.8970.0950.09291.051
    下载: 导出CSV

    表 3  助浸剂氰化浸出实验结果

    Table 3.  Cyanide leaching test results of leaching aid

    药剂种类氧化型氨类有机型重金属
    H2O2KMnO4KCrO7ADPHHASTCEDTA-4NaSucPb(NO3)2
    浸出率/%92.584.551.884.599.396.799.599.594.399.6
    下载: 导出CSV

    表 4  两种助浸剂混合助浸实验结果

    Table 4.  Results of two leaching aids mixed with leaching aids

    助浸剂组合①+②①+③①+④①+⑤②+③②+④②+⑤③+④③+⑤④+⑤
    浸出率/%91.8492.6177.7891.7782.8298.2980.8991.1581.1499.34
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收稿日期:  2022-04-07
刊出日期:  2023-04-25

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