Study on the comprehensive recovery of Fe and Ti from a low grade vanadium-titanium magnetite in Xinjiang
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摘要: 针对新疆某低品位钒钛磁铁矿资源，进行了铁、钛选矿高效综合回收试验研究，根据矿石特性，开发了阶磨阶选回收铁—强磁预富集+浮选回收钛的铁、钛综合回收技术工艺流程。选铁流程最终获得产率16.43%，TFe品位57.08%，Fe回收率53.24%的铁精矿产品；选钛预富集最终获得产率23.35%，TiO2品位16.30%，回收率50.22%的钛铁矿入浮物料产品；浮选选钛最终获得产率25.60%，TiO2品位48.02%、TiO2作业回收率为75.62%的钛精矿产品。指标良好，为该地区低品位钒钛磁铁矿的铁、钛资源回收提供了技术参考。Abstract: Aiming at a low-grade vanadium titanomagnetite resource in Xinjiang, an experimental study on efficient comprehensive recovery of iron and titanium benefication was carried out. According to the specific properties of the ore, a technological process of iron and titanium comprehensive recovery was developed, including stage grinding stage selection of iron, strong magnetic preconcentration, and flotation to recover titanium. The iron concentrate product with a yield of 16.43%, a TFe grade of 57.08%, and a Fe recovery of 53.24% was finally obtained from the iron separation process. Ilmenite flotation material products with yield of 23.35%, TiO2 grade of 16.30% and recovery of 50.22% were finally obtained by titanium separation and preconcentration. The final result of titanium flotation is a titanium concentrate product with a yield of 25.60%, a TiO2 grade of 48.02%, and a TiO2 recovery rate of 75.62%. With such good index, this process provides a technical reference for iron and titanium recycling of low-grade vanadium titanium magnetite in such areas.
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Key words:
- vanadium titanomagnetite /
- low-grade ore /
- mineral separation /
- iron /
- titanium /
- recovery rate
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图 3 一段弱磁选磁场强度试验结果
Figure 3. Results of magnetic field intensity test for the first weak magnetic separation
图 4 二段弱磁选磨矿细度试验结果
Figure 4. Results of grinding fineness test for the second stage weak magnetic separation
图 5 二段弱磁选磁场强度试验结果
Figure 5. Test results of magnetic field strength for the second weak magnetic separation
图 7 一段强磁磁场强度试验结果
Figure 7. Test results of strong magnetic field intensity for the first section
图 8 二段强磁磁场强度试验结果
Figure 8. Test results of strong magnetic field strength for the second stage
图 16 浮选选钛闭路试验流程及条件
Figure 16. Closed circuit test flow and conditions for titanium flotation
表 1 试验原矿化学多项分析结果
Table 1. Chemical multiple analysis results of the test raw ore
% TFe FeO Fe2O3 TiO2 V2O5 SiO2 Al2O3 17.40 10.06 13.42 7.78 0.154 35.38 4.46 CaO MgO Cu Co Ni S P 14.53 9.68 0.029 0.013 0.024 0.063 0.046 
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表 2 原矿铁化学物相分析结果
Table 2. Chemical phase analysis results of raw iron ore
% 钛磁铁
矿中铁钛铁矿
中铁赤、褐
铁中铁菱铁矿
中铁硫化铁
中铁硅酸铁
中铁合计 含 量 9.79 1.15 2.56 0.59 0.26 2.89 17.24 占有率 56.79 6.67 14.85 3.42 1.51 16.76 100.00
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表 3 原矿钛化学物相分析结果
Table 3. Chemical phase analysis results of raw titanium ore
% 钛铁矿中TiO2 钛磁铁矿中TiO2 其它TiO2 合计 含量 4.30 1.40 2.05 7.75 占有率 55.48 18.07 26.45 100.00
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表 4 钛磁铁矿粒度统计
Table 4. Particle size statistics of titanium magnetite
粒级/mm 钛磁铁矿 钛铁矿 含量/% 累计/% 含量/% 累计/% 0.5 6.9 6.9 9.28 9.28 −0.5～+0.1 48.15 55.05 52.9 62.18 −0.10～+0.074 29.25 84.3 20.25 82.43 −0.074～+0.043 7.96 92.26 6.89 89.32 −0.043 7.74 100 10.68 100
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