Study on Synchronous Flotation Process of a Gold-bearing Copper Ore
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摘要:
某铜矿石铜品位为0.85%, 含金0.90 g/t, 铜氧化率为21.17%。为开发利用该矿石资源, 开展了系统的工艺矿物学研究, 研发了硫化铜矿物与氧化铜矿物同步浮选工艺, 实现了铜和金的综合回收, 经过一次粗选、三次精选和三次扫选闭路试验流程处理, 可以获得铜品位15.36%、含金12.58 g/t的铜金精矿, 铜和金的回收率分别达到70.93%和54.33%。
Abstract:The gold-bearing copper ore contains 0.85% copper and 0.90 g/t gold, and the oxidation rate of copper is 21.17%.In order to develop and utilize the gold-bearing copper ore, the process mineralogy was carried out. The synchronous flotation technology of sulfide minerals and oxidized minerals was developed to realize the comprehensive recovery of copper and gold. The results showed that the copper-gold concentrate with copper grade of 15.36% and gold content of 12.58 g/t was obtained by the closed-circuit recycling process of one roughing, three scavengings, and three cleanings. The recovery of copper and gold was 70.93% and 54.33%, respectively.
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Key words:
- gold-bearing copper ore /
- sulfuration flotation /
- synchronous flotation /
- copper
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表 1 矿石的主要化学成分分析结果
/% Table 1. Analysis results of main chemical components
组分 Cu Au Zn Mo Ni TFe FeO Fe2O3 MnO SiO2 含量 0.85 0.90 0.59 0.0035 0.011 12.42 7.98 8.89 0.23 32.5 组分 Al2O3 CaO MgO Na2O K2O S As P C LOI 含量 2.31 18.51 7.18 0.15 0.13 2.45 0.041 0.017 1.28 3.51 注：Au含量的单位为g/t。 
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表 2 铜的化学物相分析结果
/% Table 2. Chemical phase analysis of copper
铜相 原生硫化铜 次生硫化铜 自由氧化铜 结合氧化铜 合计 含量 0.54 0.13 0.10 0.08 0.85 分布率 63.53 15.30 11.76 9.41 100.00
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表 3 捕收剂种类及用量对粗精矿指标的影响
Table 3. Influence of collector's types and dosage on rough concentrate index
捕收剂 产品名称 产率/% 铜品位/% 铜回收率/% 种类 用量/(g·t-1) 丁基黄药 100 粗精矿 10.89 5.67 75.89 150 粗精矿 11.60 5.36 77.01 200 粗精矿 12.52 5.08 77.59 250 粗精矿 12.68 5.00 78.41 戊基黄药 200 粗精矿 15.62 3.85 78.08 乙基黄药 200 粗精矿 9.97 5.95 72.49
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表 4 闭路试验结果
Table 4. Results of closed-circuit test
产品名称 产率/% 品位 回收率/% 铜/% 金/(g·t-1) 锌/% 铜 金 锌 铜金精矿 3.82 15.36 12.58 8.17 70.93 54.33 52.90 尾矿 96.18 0.25 0.42 0.29 29.07 45.67 47.10 原矿 100 0.83 0.88 0.59 100.00 100.00 100.00
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