江西某低品位钨矿石浮选试验

江西某低品位白钨矿石WO3含量为0.20%,矿物组成较复杂,金属矿物主要有白钨矿、磁黄铁矿等,非金属矿物主要有萤石、石英、透闪石、滑石、金云母、黑云母、白云母、石榴石、长石、绢云母、方解石等,含钙脉石矿物含量较高,矿石中白钨矿与脉石矿物共生关系紧密。为确定白钨矿的高效选矿工艺,进行了选矿试验研究。结果表明,矿石在磨矿细度为-0.074 mm占65%的情况下1次浮选脱硫,然后以碳酸钠为矿浆p H调整剂、水玻璃+栲胶为脉石矿物组合抑制剂、731为白钨矿浮选捕收剂,经1粗2精1扫浮选预富集钨、预富集精矿水玻璃强化调浆后1粗2精1扫常温浮选选钨、常温钨精矿90℃下水玻璃强化调浆后1粗5精1扫加温浮选选钨,最终获得WO3品位50.23%、WO3回收率为70.32%的白钨精矿,实现了白钨矿的高效回收。

Flotation Study on a Low Grade Tungsten Ore From Jiangxi

A low grade scheelite from Jiangxi has 0.20% WO3， and its mineral compositions is complex. The major species of metallic ores include scheelite， pyrrhotite and so on， and the non-metallic ores include fluorite， quartz， tremolite， talc， phlogopite， biotite， muscovite， garnet， feldspar， sericite， calcite and so on. A large proportion of calcium-bearing gangue closely associated with scheelite. In order to determine a high efficiency mineral processing technology， beneficiation experiments were carried out. The results showed that when the grinding fineness is -0.074 mm accounted 65%， NaCO3 was used as adjusting agent， sodium silicate and tannin extracts as the combined depressor， and 731 as collector， the raw ore was tackled by a desulfurization flotation and tungsten preconcentration including one roughing， two cleanings， and one scavenging flotation to obtain the rough concentrate. After intensifying mixing by sodium silicate， the rough concentrate was tackled by one roughing， two cleanings and one scavenging flotation at normal temperature to obtain tungsten rough concentrate. The tungsten rough concentrate was mixed again with sodium silicate at 90 ℃ and tackled by one roughing， five cleanings， one scavenging flotation， and finally， tungsten concentrate with WO3 grade of 50.23% and recovery of 70.32% was obtained， which efficiently recovered the scheelite.