Test on Discarding Tailings of Waste Rocks of a Vanadium-titanium Magnetite in Panxi Area
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摘要:
针对攀西某钒钛磁铁矿废石，采用“干式+湿式”组合抛尾。结果表明：废石破碎至-40 mm后，采用干式抛尾，可抛出流程产率23.73%、TFe品位9.96%、TiO2品位3.92%的尾矿；干抛精矿细碎至-5 mm后，采用湿式重磁拉抛尾，可抛出流程产率27.36%、TFe品位7.86%、TiO2品位2.81%的尾矿；“干式+湿式”组合抛尾，最终抛尾率可达51.09%，精矿TFe品位提升5.56个百分点，TiO2品位提升2.75个百分点，可大幅降低后续磨矿量，提高后续入选品位，降低此类资源的选矿成本。
Abstract:The combined methods of dry-discarding and wet-discarding were used to separate the vanadium-titanium-magnetite waste rock in Panxi. The results indicated that the grades of TFe and TiO2 which existed in the tailings reached 9.96% and 3.92%, respectively, and the recovery reached 23.73% using the dry-discarding method after the waste rocks were crushed to -40 mm. In addition, after the concentrates of dry-discarding were crushed to -5 mm, using the wet-discarding method, the grades of TFe and TiO2 which existed in the tailings reached 7.86% and 2.81%, respectively, and the recovery reached 27.36%. Finally, the discarding rate reached 51.09% using the combination methods of dry-discarding and wet-discarding, and the TFe grade of concentrate increased 5.56 percentage, TiO2 grade increased 2.75 percentage. The method could greatly reduce the subsequent grinding amount, improve the initial grade, and reduce the mineral processing cost.
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Key words:
- Mineral processing engineering /
- Wasterocks /
- Dry-discarding /
- Wet-discarding
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表 1 原矿化学多元素分析结果/%
Table 1. Multi-element analysis results of the raw ore
TFe Fe2O3 FeO V2O5 TiO2 S CaO MgO Al2O3 SiO2 P 14.25 8.69 11.60 0.10 5.83 0.26 11.78 7.52 11.80 36.38 0.33 
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表 2 原矿铁物相分析
Table 2. Iron phase analysis of the raw ore
名称 钛磁铁矿中铁 钛铁矿中铁 硫化物中铁 硅酸盐中铁 合计 含量/% 6.61 2.95 0.68 4.04 14.28 分布率/% 46.28 20.67 4.74 28.31 100.00
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表 3 原矿钛物相分析
Table 3. Titanium phase analysis of the raw ore
名称 钛磁铁矿中钛 钛铁矿中钛 脉石中钛 合计 含量/% 1.32 3.36 1.35 6.03 分布率/% 21.92 55.66 22.42 100.00
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表 4 原矿分级实验
Table 4. Classification tests of the raw ores
产品 产率/% 品位/% 回收率/% TFe TiO2 TFe TiO2 粗粒级 30.38 13.61 5.83 29.20 29.71 细粒级 69.62 14.40 6.02 70.80 70.29 原矿 100.00 14.16 5.96 100.00 100.00
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表 5 粗粒级干式抛尾生产实验
Table 5. Dry-discarding production test of coarse grain V-Ti magnetite
产品 产率/% 品位/% 回收率/% TFe TiO2 TFe TiO2 精矿 83.18 14.36 6.21 87.77 88.61 尾矿 16.82 9.90 3.95 12.23 11.39 给矿 100.00 13.61 5.83 100.00 100.00
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表 6 细粒级干式抛尾生产实验
Table 6. Dry-discarding production test of fine-grain V-Ti magnetite
产品 产率/% 品位/% 回收率/% TFe TiO2 TFe TiO2 粗选精矿 55.95 17.36 7.23 67.45 67.23 扫选精矿 17.31 11.66 5.34 14.01 15.36 扫选尾矿 26.74 9.98 3.92 18.54 17.41 给矿 100.00 14.40 6.02 100.00 100.00
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表 7 尾矿选铁实验
Table 7. Iron separation tests of tailings
样品 产品 产率/% 品位/% 回收率/% TFe TiO2 TFe TiO2 粗粒尾矿 精矿 1.12 54.87 7.45 6.21 2.11 尾矿 98.88 9.39 3.91 93.79 97.89 给矿 100.00 9.90 3.95 100.00 100.00 细粒尾矿 精矿 1.23 54.62 7.52 6.73 2.36 尾矿 98.77 9.42 3.88 93.27 97.64 给矿 100.00 9.98 3.92 100.00 100.00
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表 8 抛尾设备对比实验
Table 8. Effect of separation equipment on dressing indexes
抛尾设备 产品 产率/% 品位/% 回收率/% TFe TiO2 TFe TiO2 中磁滚筒
磁选机精矿 40.34 23.81 9.22 62.09 56.44 尾矿 59.66 9.83 4.81 37.91 43.56 给矿 100.00 15.47 6.59 100.00 100.00 重磁拉强
磁选机精矿 62.22 20.03 8.90 80.56 84.03 尾矿 37.78 7.96 2.79 19.44 15.97 给矿 100.00 15.47 6.59 100.00 100.00
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表 9 湿式抛尾生产实验
Table 9. Wet tailing production test
产品 产率/% 品位/% 回收率/% TFe TiO2 TFe TiO2 精矿 64.13 19.72 8.71 81.77 84.71 尾矿 35.87 7.86 2.81 18.23 15.29 给矿 100.00 15.47 6.59 100.00 100.00
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表 10 尾矿选铁实验
Table 10. Iron separation tests of tailings
产品 产率/% 品位/% 回收率/% TFe TiO2 TFe TiO2 精矿 0.46 55.41 6.15 3.24 1.01 尾矿 99.54 7.64 2.79 96.76 98.99 给矿 100.00 7.86 2.81 100.00 100.00
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