Experimental Study on Flotation Separation of a Copper-molybdenum Ore with a Novel Collector KMC-1
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摘要:
为了查明新型捕收剂KMC-1对某铜钼矿铜钼分离的影响，通过浮选试验、筛分-水析的方法，对比了丁基黄药、AP、Y89（C6H13OSSNa）、异戊基黄药、丁铵黑药、KMC-1等捕收剂对浮选指标的影响。研究结果表明：新型捕收剂KMC-1优于其他5种捕收剂，采用“铜钼混合浮选—铜钼分离”工艺流程，可以获得产率0.021%、钼品位47.79%、钼回收率89.14%的钼精矿和产率1.85%、铜品位29.87%、铜回收率91.23%的铜精矿，钼精矿含铜0.51%、铜精矿含钼0.021%，铜钼互含较低，铜钼分离效果良好。捕收剂KMC-1可实现粗粒级条件下铜矿物及钼矿物的高效捕收，在较宽的粒级范围内，铜精矿铜品位及钼精矿钼品位较高。
Abstract:In order to investigate the effect of the novel collector KMC-1 on the separation of copper and molybdenum from a copper-molybdenum ore, the different kinds of collectors including butyl xanthate, AP, Y89 (C6H13OSSNa), isoamyl xanthate, ammonium butyl aerofloat and KMC-1 were compared through flotation tests and screening-hydraulic analysis. The results showed that the novel collector KMC-1 was better than the other five collectors. Using the flowsheet of “Cu-Mo bulk flotation–Cu-Mo separation” and KMC-1, the molybdenum concentrate with the yield of 0.021%, molybdenum grade of 47.79% and molybdenum recovery of 89.14% was obtained, as well as the copper concentrate with the yield of 1.85%, copper grade of 29.87% and copper recovery of 91.23%. Furthermore, the molybdenum concentrate contained 0.51% copper, and the copper concentrate contained 0.021% molybdenum, demonstrating that the mutual content of copper and molybdenum in the respective concentrate was low, and the separation of copper and molybdenum was realized. Additionally, copper minerals and molybdenum minerals in the coarse-grained range could be efficiently collected with KMC-1, resulting in higher grades of copper and molybdenum in concentrate.
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Key words:
- copper-molybdenum separation /
- collectors /
- mixed flotation
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表 1 原矿化学多元素分析结果
Table 1. Results of chemical multi-element analysis of raw ore
/% 成分 Cu Mo Fe S MgO SiO2 Na 含量 0.53 0.012 3.47 0.89 2.06 62.17 1.74 成分 Zn Pb CaO Al2O3 Au* Ag* 含量 0.017 <0.05 1.77 12.93 0.10 1.29 注：*代表含量单位为g/t。 
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表 2 铜物相分析结果
Table 2. Results of copper phase analysis
/% 元素物相 胆矾 游离氧化铜 结合氧化铜 硫化铜 其他铜 总铜 含量 <0.01 0.015 0.013 0.48 0.012 0.53 分布率 1.89 2.83 2.45 90.57 2.26 100.00
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表 3 不同再磨细度下小型闭路试验结果
Table 3. Results of closed-circuit test of re-grinding fineness
/% 再磨细度
(−0.048 mm含量)%产品
名称产率 品位 回收率 Cu Mo Cu Mo 80 铜钼精矿 1.71 25.88 0.62 84.59 92.04 尾矿 98.29 0.082 0.00087 15.41 7.96 原矿 100.00 0.53 0.012 100.00 100.00 85 铜钼精矿 1.75 27.51 0.60 88.15 90.02 尾矿 98.25 0.065 0.0012 11.85 9.98 原矿 100.00 0.54 0.012 100.00 100.00 90 铜钼精矿 1.77 27.22 0.63 86.74 90.44 尾矿 98.23 0.075 0.0012 13.26 9.56 原矿 100.00 0.53 0.012 100.00 100.00
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表 4 全流程浮选小型闭路试验结果
Table 4. Results of whole process of closed-circuit tests
/% 捕收剂 产品名称 产率 品位 回收率 Cu Mo Cu Mo KMC-1 钼精矿 0.021 0.51 47.79 0.018 89.14 铜精矿 1.85 29.87 0.021 91.23 3.45 尾矿 98.13 0.054 0.00085 8.75 7.41 原矿 100.00 0.53 0.011 100.00 100.00 Y89 钼精矿 0.02 0.86 43.21 0.04 82.60 铜精矿 1.56 29.93 0.016 88.38 2.25 尾矿 98.42 0.062 0.0017 11.58 15.15 原矿 100.00 0.53 0.011 100.00 100.00
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