Study on the Effect of Grinding Fineness on Flotation in Maoniuping Rare Earth Mine
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摘要:
四川牦牛坪稀土矿是我国第二大稀土矿山，稀土资源丰富，且伴生有大量的萤石和重晶石资源。由于矿石中稀土、重晶石矿和萤石矿这三种矿物的嵌布粒度及磨矿难易程度不同，为将有用矿物最大限度综合利用起来，对该矿石进行了磨矿细度的浮选实验研究。结果表明，将磨矿细度控制在-0.074 mm 53.47%的条件下，各有用矿物的综合回收率较高，实现共伴生资源的综合利用。
Abstract:Maoniuping rare earth mine in Sichuan Province is the second largest rare earth one in China. It is rich in rare earth resources, and there are a lot of fluorite and barite resources associated with it. Due to the different distribution size and grinding difficulty of the three minerals of rare earth, barite and fluorite in the ore, the flotation test of grinding fineness of the ore was carried out in order to maximize the comprehensive utilization of useful minerals. The results show when the grinding fineness is controlled at -0.074 mm 53.47%, the comprehensive recovery rate of all useful minerals is relatively high, and the comprehensive utilization of co-associated resources is realized.
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Key words:
- rare earth /
- barite /
- fluorite /
- fineness of grinding /
- flotation /
- comprehensive utilization
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表 1 矿石化学多元素分析结果/%
Table 1. Chemical multi-element analysis results of the ore
BaSO4 CaF2 Fe Pb Mo REO SiO2 Al2O3 K2O MgO CaO TiO2 S P 18.92 12.65 2.38 0.64 0.008 2.94 30.81 8.95 3.42 1.09 0.44 0.21 2.89 0.16 
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表 2 开路重晶石浮选结果
Table 2. Open-circuit barite flotation results
产物名称 产率/% BaSO4品位/% BaSO4回收率/% 精矿 17.59 97.89 89.58 中Ⅲ 0.95 65.31 3.23 中Ⅱ 1.07 23.28 1.30 中Ⅰ 1.71 12.35 1.10 扫Ⅱ 0.75 4.91 0.19 扫Ⅰ 1.67 6.46 0.56 尾矿 76.26 1.02 4.05 给矿 100.00 19.22 100.00
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表 3 闭路重晶石浮选结果
Table 3. Closed-circuit barite flotation results
产物名称 产率/% BaSO4品位/% BaSO4回收率/% 精矿 18.21 97.62 93.96 尾矿 81.79 1.40 6.04 给矿 100.00 18.92 100.00
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表 4 开路稀土浮选结果
Table 4. Open-circuit rare earth flotation results
产物名称 产率/% REO品位/% REO回收率/% 精矿 11.32 17.56 70.38 中Ⅲ 2.13 8.95 6.74 中Ⅱ 2.62 6.27 5.82 中Ⅰ 10.51 3.32 12.36 扫Ⅰ 4.03 0.54 0.77 尾矿 69.40 0.16 3.93 给矿 100.00 2.82 100.00
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表 5 闭路稀土浮选结果
Table 5. Closed-circuit rare earth flotation results
产物名称 产率/% REO品位/% REO回收率/% 精矿 15.59 17.12 91.09 尾矿 84.41 0.31 8.91 给矿 100.00 2.93 100.00
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表 6 开路萤石浮选结果
Table 6. Open-circuit fluorite flotation results
产物名称 产率/% CaF2品位/% CaF2回收率/% 精矿 12.62 72.98 77.67 中Ⅲ 1.89 35.42 5.63 中Ⅱ 2.47 21.45 4.46 中Ⅰ 8.91 9.43 7.09 扫Ⅰ 4.03 1.59 0.54 尾矿 70.08 0.78 4.61 给矿 100.00 11.86 100.00
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表 7 闭路萤石浮选结果
Table 7. Closed-circuit fluorite flotation results
产率/% CaF2品位/% CaF2回收率/% 精矿 16.52 70.34 90.50 尾矿 83.48 1.46 9.50 给矿 100.00 12.84 100.00
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