Study on Process Mineralogy and Mineral Processing Technology of A Low Grade Copper-Molybdenum Ore
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摘要:
青海某铜钼矿含钼0.084%，铜含量0.067%。工艺矿物学研究表明，原矿中钼主要以辉钼矿形式存在，铜以黄铜矿、辉铜矿及斑铜矿等形式赋存。针对矿石性质，结合探索实验，最终采用铜钼优先浮选工艺处理该矿石。在磨矿细度为-74 μm 70%条件下，经一次粗选一次扫选两次空白精选得钼粗精矿，钼粗精矿再磨后经三次精选获得了钼品位50.21%、回收率85.21%的钼精矿；钼浮选尾矿用硫酸铜活化后经一次粗选一次扫选四次精选，获得了品位15.32%、回收率54.92%的铜精矿，实现了有价元素的综合回收。
Abstract:A copper-molybdenum ore in Qinghai contains 0.084% Mo and 0.067% Cu. Process mineralogical study shows that molybdenum in the ore mainly exists in the form of molybdenite, while copper in the form of chalcopyrite, chalcocite and bornite. Based on the molybdenum ore property, the flowsheet of selective flotation was adopted．Copper and molybdenum were comprehensively recovered by flotation process. Under the condition of grinding fineness of 74 μm 70%, molybdenum concentrate was obtained by one roughing, one scavenging and two blank cleaning. After regrinding, molybdenum concentrate with molybdenum grade of 50.21% and recovery of 85.21% was obtained by three cleaning. After molybdenum flotation tailings were activated with copper sulfate, copper concentrate with grade of 15.32% and recovery of 54.92% was obtained by one roughing, one scavenging and four cleaning. The comprehensive recovery of valuable elements was realized.
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Key words:
- Molybdenite /
- Process mineralogy /
- Flotation /
- Comprehensive recovery
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表 1 原矿多元素分析结果/%
Table 1. Results of chemical analysis of the ore
Mo Cu Pb Zn S TFe Ni Mn SiO2 Al2O3 CaO MgO Na2O P TiO2 As 0.084 0.067 0.013 0.019 1.63 2.54 0.002 0.092 68.77 11.87 1.96 1.08 0.76 0.039 0.37 0.0036 
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表 2 原矿钼物相分析结果
Table 2. Analysis results of molybdenum phase in raw ore
名称 硫化钼中钼 氧化钼中钼 相和 含量/% 0.081 0.004 0.085 分布率/% 95.29 4.71 100.00
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表 3 钼浮选尾矿综合回收铜实验结果
Table 3. Results of comprehensive recovery of copper from molybdenum flotation tailings
产品名称 产率/% 品位/% 回收率/% Mo Cu Mo Cu 钼粗精矿 1.14 6.49 0.21 85.74 3.51 钼中矿 0.50 0.28 0.19 1.62 1.37 铜精矿 0.20 0.12 17.42 0.23 50.18 中矿3 1.17 0.023 0.64 0.35 10.79 中矿2 1.37 0.020 0.32 0.35 6.31 中矿1 0.53 0.052 0.64 0.35 4.88 中矿 0.13 0.20 1.31 0.35 2.45 尾矿 94.96 0.010 0.015 11.01 20.51 原矿 100.00 0.086 0.069 100.00 100.00
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表 4 闭路实验结果
Table 4. Test results of closed-circuit flotation
产品名称 产率/% 品位 /% 回收率 /% Mo Cu Mo Cu 钼精矿 0.14 50.21 0.20 85.21 0.43 铜精矿 0.24 0.07 15.32 0.24 54.92 尾 矿 99.62 0.012 0.03 14.55 44.65 原 矿 100.00 0.083 0.067 100.00 100.00
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