Comprehensive Recovery Test of Valuable Metals from a Silver, Gold and Copper Bearing Sulfide Concentrate
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摘要:
这是一篇矿物加工工程领域的论文。对某含铜金银硫精矿进行了选矿综合回收实验研究，实验结果表明，采用异丁基黄药+乙硫氮组合捕收剂，氧化钙做抑制剂，2#油做起泡剂，经过一次粗选-三次精选-二次扫选的浮选工艺流程，最终可得到铜品位为16.66%、回收率为86.96%，金品位为278.95 g/t，回收率为75.56%；银品位为1848.74 g/t，回收率为78.55%的精矿产品，有效地实现了硫精矿中铜的综合回收，同时使金、银很好地富集在铜精矿中，便于回收利用，选矿指标理想。
Abstract:This is an article in the field of mineral processing engineering. The comprehensive recovery test of silver, gold and copper bearing sulfide concentrate was carried out. With isobutyl xanthate and sodium diethyl dithiocarbamate as a combined collector, calcium oxide as the depressant, 2# oil as a frother, which produced a concentrate approaching 16.66% Cu grade at 86.96% recovery, Au content of 278.95 g/t at 75.56% Au recovery and Ag content of 1848.74 g/t at 78.55% Ag recovery by a flotation process consisting of one stage of roughing, three stages of cleaning and two stages of scavenging was used to collect lead minerals. The comprehensive recovery of copper from sulfur concentrate has been effectively realized. At the same time, gold and silver are well enriched in copper concentrate, which is convenient for recovery and utilization, and the mineral processing index is ideal.
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Key words:
- Mineral processing engineering /
- Flotation /
- Sulfur concentrate /
- Comprehensive recovery /
- Chalcopyrite /
- Gold /
- Silver
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表 1 样品化学多元素分析/%
Table 1. Chemical multi-element analysis of samples
TFe S Cu Pb Zn Au* Ag* SiO2 31.30 39.20 1.29 0.27 0.22 24.61 158.00 14.60 CaO MgO Al2O3 Na2O K2O C As 2.40 2.00 2.95 0.01 0.60 0.97 0.0011 *单位为g/t. 
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表 2 金物相分析结果
Table 2. Gold physical phase analysis results
名称 裸露+
半裸露Au碳酸
盐中Au褐铁
矿中Au硫化
物中Au硅酸
盐中Au合计 含量/(g/t) 1.12 0.20 0.18 22.11 0.41 24.02 占有率% 4.66 0.83 0.75 92.05 1.71 100.00
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表 3 铜物相分析结果
Table 3. Copper physical phase analysis results
名称 氧化相 硫化相 结合相 合计 含量/% 0.008 1.09 0.18 1.278 占有率/% 0.63 85.29 14.08 100.00
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表 4 磨矿细度实验结果
Table 4. Test results of grinding fineness
-0.037 mm
含量/%产物
名称产率/% 品位/% 回收率/% Cu Au* Cu Au 65 精矿 25.00 3.93 68.97 78.44 70.44 尾矿 75.00 0.36 9.65 21.56 29.56 原矿 100.00 1.25 24.48 100.00 100.00 75 精矿 25.90 3.97 69.37 80.32 73.57 尾矿 74.10 0.34 8.71 19.68 26.43 原矿 100.00 1.28 24.42 100.00 100.00 85 精矿 30.10 3.42 64.13 83.55 77.82 尾矿 69.90 0.29 7.87 16.45 22.18 原矿 100.00 1.23 24.80 100.00 100.00 90 精矿 30.25 3.77 64.65 89.10 78.98 尾矿 69.75 0.20 7.46 10.90 21.02 原矿 100.00 1.28 24.76 100.00 100.00 95 精矿 31.90 3.51 60.58 88.67 78.40 尾矿 68.10 0.21 7.82 11.33 21.60 原矿 100.00 1.26 24.65 100.00 100.00 *单位为g/t
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表 5 抑制剂种类对比实验结果
Table 5. Test results of inhibitor type comparison
抑制剂种类
及用量/（g/t）产物
名称产率/% 品位/% 回收率/% Cu Au* Cu Au 氧化钙：6000 精矿 34.30 3.12 53.50 87.16 75.04 尾矿 65.70 0.24 9.29 12.84 24.96 原矿 100.00 1.23 24.45 100.00 100.00 单宁酸：600 精矿 60.70 1.46 27.03 73.10 67.83 尾矿 39.30 0.83 19.80 26.90 32.17 原矿 100.00 1.21 24.19 100.00 100.00 焦性没食子酸：600 精矿 44.87 2.12 26.30 76.84 48.54 尾矿 55.13 0.52 22.69 23.16 51.46 原矿 100.00 1.24 24.31 100.00 100.00 *单位为g/t
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表 6 捕收剂种类对比实验结果
Table 6. Test results of trapping agent type comparison
捕收剂种类
及用量/（g/t）产物
名称产率/% 品位/% 回收率/% Cu Au* Cu Au 异丁黄：80
黑药：40精矿 33.20 3.34 51.55 87.37 69.24 尾矿 66.80 0.24 11.38 12.63 30.76 原矿 100.00 1.27 24.72 100.00 100.00 丁黄：80
乙硫氮：40精矿 28.00 3.75 58.52 83.41 66.35 尾矿 72.00 0.59 11.54 16.59 33.65 原矿 100.00 1.25 24.69 100.00 100.00 异丁黄：80
乙硫氮：40精矿 35.20 3.23 55.09 89.31 77.94 尾矿 64.80 0.21 8.47 10.69 22.06 原矿 100.00 1.27 24.82 100.00 100.00 Z-200：50 精矿 39.87 2.51 37.78 78.21 60.59 尾矿 60.13 0.46 16.29 21.79 39.41 原矿 100.00 1.28 24.86 100.00 100.00 *单位为g/t
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表 7 氧化钙用量实验结果
Table 7. Test results of calcium oxide dosage
氧化钙
用量/（g/t）产物名称 产率/% 品位/% 回收率/% Cu Au* Cu Au 6000 精矿 32.30 3.44 55.48 87.71 73.69 尾矿 67.70 0.23 9.45 12.29 26.31 原矿 100.00 1.27 24.32 100.00 100.00 8000 精矿 29.80 3.64 61.10 88.54 73.92 尾矿 70.20 0.20 9.15 11.46 26.08 原矿 100.00 1.23 24.63 100.00 100.00 10000 精矿 29.25 3.90 67.83 88.96 78.74 尾矿 70.75 0.20 7.46 11.04 21.26 原矿 100.00 1.28 24.83 100.00 100.00 12000 精矿 28.30 3.95 57.96 88.63 66.28 尾矿 71.70 0.20 11.64 11.37 33.72 原矿 100.00 1.26 24.75 100.00 100.00 *单位为g/t
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表 8 捕收剂用量实验流程结果
Table 8. Results of test flow of trapping agent dosage
捕收剂用
量/（g/t）产物名称 产率/% 品位/% 回收率/% Cu Au* Cu Au 60+30 精矿 25.42 4.20 69.91 82.16 71.03 尾矿 74.58 0.31 9.72 17.84 28.97 原矿 100.00 1.30 25.02 100.00 100.00 70+35 精矿 25.16 4.39 75.07 86.25 74.83 尾矿 74.84 0.24 8.49 13.75 25.17 原矿 100.00 1.28 25.24 100.00 100.00 80+40 精矿 27.07 4.21 73.43 88.28 79.10 尾矿 72.93 0.21 7.20 11.72 20.90 原矿 100.00 1.29 25.13 100.00 100.00 90+45 精矿 28.50 3.94 69.79 88.36 79.05 尾矿 71.50 0.21 7.37 11.64 20.95 原矿 100.00 1.27 25.16 100.00 100.00 *单位为g/t
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表 9 开路实验结果
Table 9. Results of open-circuit tests
产物名称 产率/% 品位/% 回收率/% Cu Au* Cu Au 精矿 4.70 18.82 266.20 70.40 51.24 中5 1.28 5.25 64.23 5.35 3.37 中4 2.88 3.11 52.19 7.13 6.16 中3 8.32 1.44 36.25 9.54 12.35 中2 2.05 0.97 83.52 1.58 7.01 中1 1.23 0.81 54.33 0.79 2.74 尾矿 79.54 0.10 5.26 6.33 17.13 原矿 100.00 1.27 24.42 100.00 100.00 *单位为g/t
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表 10 闭路实验结果
Table 10. Test results of closed circuit
产物名称 产率/% 品位/% 回收率/% Cu Au* Ag* Cu Au Ag 精矿 6.72 16.66 278.95 1848.74 86.96 75.56 78.55 尾矿 93.28 0.18 6.50 36.36 13.04 24.44 21.45 原矿 100.00 1.29 24.81 158.15 100.00 100.00 100.00 *单位为g/t
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