某片麻岩型白钨矿中石墨含量较高、钨品位低，以白钨矿为主，含有部分黑钨矿，钨矿物嵌布粒度细，属“贫”、“细”、“杂”难选的白钨矿。根据矿石的性质，提出“炭硫异步浮选-白钨粗选-钨粗精矿常温精选”工艺，以煤油+丁基黄药+丁铵黑药组合进行脱碳脱硫，硫脱除率从20%左右提高到86.29%，脱碳脱硫尾矿进入选钨作业。白钨矿浮选采用Na2CO3为pH调整剂，水玻璃+FeSO4为脉石抑制剂，731为白钨矿捕收剂，当原矿为WO3含量为0.157%时，获得产率0.19%，WO3品位52.72%，WO3回收率62.30%的白钨精矿。%Based on the ore property, a process of differential flotation for carbon and sulfur, roughing and cleaning at room temperature was designed for the low-grade scheelite ore in Yunnan Province. Diesel, butyl xanthate and ammonium dibutyl dithiophosphate were combined to remove carbonous and sulfur materials. Na2CO3 was used as pH modifier, Na2SiO3 and FeSO4 worked as gangue depressor, 731 as collector during scheelite concentration. The test results showed that the removal rate of carbon and sulfur increased to 86.29% from original 20% , 0.19% of mass production and 52.72% of tungsten concentrate (WO3). A tungsten recovery of 62.30% was gained from the raw ores with grade of WO30.157% .
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