Experimental study on beneficiation of a foreign refractory ilmenite ore
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摘要: 针对国外某钛铁矿矿物组成复杂,有价矿物之间共生关系密切,且钛铁矿嵌布粒度细等问题,采用阶段磨矿—阶段选别的磁选—浮选工艺流程对该难选钛铁矿矿石进行了选矿工艺试验研究。结果表明,对含TFe 55.36%、TiO2 9.91%的原矿,采用该工艺后,可获得TFe品位64.50%,回收率81.70%的铁精矿和TiO2品位为47.22%、回收率为50.55%的钛精矿。该工艺为开发利用该矿产资源提供了技术支撑。Abstract: In view of the complex mineral composition of a ilmenite from overseas, the close symbiotic relationship between valuable minerals and the fine particle size of ilmenite, the experimental study on the beneficiation process of the refractory ilmenite ore was carried out using the stage grinding-stage separation magnetic separation-flotation process flow. The results show that the iron concentrate with TFe grade of 64.50% and recovery rate of 81.70%, the titanium concentrate with TiO2 grade of 47.22% and recovery rate of 50.55% can be obtained from the run-of-mine with TFe grade of 55.36% and TiO2 grade of 9.91%. This process provides a technical support for the open utilization of the mineral resources.
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Key words:
- ilmenite /
- titanomagnetite /
- stage-grinding /
- stage-separation /
- magnetic separation /
- flotation
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表 1 原矿多元素分析
Table 1. Multi-element results of run-of-mine
% TiO2 TFe Al2O3 Cu Zn Pb Bi CaF2 SiO2 MgO CaO Na2O K2O V2O3 P S 烧失量 9.91 55.36 10.87 0.011 0.006 0.012 0.0047 0.32 8.79 5.59 6.21 1.92 0.47 0.026 0.090 0.21 0.202 表 2 铁物相分析结果
Table 2. Mineral composition of iron in run-of-mine
% 铁物相 含量 分布率 硫化矿中的铁 0.07 0.13 赤铁矿中的铁 2.42 4.37 褐铁矿中的铁 3.44 6.20 钛磁铁矿中的铁 45.41 82.03 钛铁矿中的铁 3.14 5.67 硅酸铁中的铁 0.27 0.11 碳酸铁中的铁 0.61 1.48 合计 55.36 100.00 表 3 钛物相分析结果
Table 3. Mineral composition of titanium in run-of-mine
% 钛物相 含量 分布率 钛磁铁矿中的钛 2.65 26.74 钛铁矿中的钛 5.66 57.11 金红石中的钛 0.72 7.27 辉石中的钛 0.06 0.61 榍石中的钛 0.27 2.72 角闪石中的钛 0.06 0.61 褐铁矿中的钛 0.07 0.70 金云母中的钛 0.42 4.24 合计 9.91 100.00 表 4 回收铁开路试验结果
Table 4. Open circuit test results of iron recovery
% 产品名称 产率 TFe品位 TFe回收率 铁精矿 70.12 64.50 81.70 磁选尾矿 29.88 14.56 18.30 原矿 100.00 55.36 100.00 表 5 全流程闭路试验结果
Table 5. Results of closed-circuit flotation test
% 产品名称 产率 TiO2品位 TiO2回收率 精矿 8.45 47.22 50.55 尾矿 91.55 3.43 49.45 原矿 100.00 9.91 100.00 -
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