湖南某铍矿综合回收实验

    Multipurpose Recovery Test of Beryllium Ores in Hunan Province

    • 摘要: 这是一篇矿物加工工程领域的论文。针对湖南某铍矿含BeO 0.47%、CaF2 44.86%,含铍矿物为金绿宝石,主要脉石矿物为绿泥石、云母、方解石、白云石等,铍矿物嵌布粒度较细,与绿泥石、方解石等脉石矿物共生密切,分选难度较大。基于金绿宝石与萤石以及与主要脉石矿物的可浮性差异,实验采用原矿浮选脱除硫化矿后—优先浮选萤石—浮选尾矿脱泥后反浮选脉石矿物的工艺流程处理该矿。在磨矿细度为-0.074 mm 80%的条件下,采用组合捕收剂丁基黄药+丁铵黑药+乙硫氮浮选脱除硫化矿,然后利用组合捕收剂油酸钠+氧化石蜡皂浮选萤石得到含CaF2 96.32%、回收率为70.34%的萤石精矿,浮选尾矿脱泥后反浮选脉石矿物,可获得含BeO 1.57%、回收率为67.95%的铍精矿。铍精矿后续可采用冶金方法提取获得氧化铍产品。该工艺实现了对金绿宝石型铍矿和萤石矿物的综合回收,为同类型铍矿的开发利用提供参考。

       

      Abstract: This is an article in the field of mineral processing engineering. The beryllium ore in Hunan Province contains 0.47% BeO and 44.86% CaF2. The beryllium ore is chrysoberyl. The main gangue minerals are chlorite, mica, calcite, dolomite, etc. The disseminated particle size of beryllium ores is relatively fine, closely associated with chlorite, calcite, etc. So it is difficult to beneficiate. The beneficiation process flow is adopted by flotation of the sulphide ore first, then preferential flotation of fluorite, and the last reverse flotation of gangue minerals after flotation tailings deslimed. At the condition of the grinding fineness -0.074 mm accounted for 80%, the combined collectors of butylxanthate + ammonium dibutyldithiophosphate + sodium diethyldithiocarbamate for flotation were used to remove sulfide ores. Then fluorite concentrate with CaF2 grade of 96.32% and recovery rate of 70.34% were obtained by flotation of fluorite with the combined collectors oxidized paraffinum sodium salt + sodium oleate. After the flotation tailings are deslimed, reverse flotation of gangue minerals is adopted and the beryllium concentrate with BeO grade of 1.57% and recovery rate of 67.95% is obtained. The subsequent beryllium concentrate can be extracted by metallurgical method to obtain beryllium oxide products. This process realizes the multipurpose recovery of beryllium ores of chrysoberyl type and fluorite ores, and provides a reference for the development and utilization of the same type of beryllium ores.

       

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