Fe-BHA用于白钨矿的浮选分离

将FeCl3与苯甲羟肟酸按一定比例混合,形成一种金属离子螯合物Fe-BHA,用于白钨矿-方解石人工混合矿浮选分离。在pH值为7.7时,取得最佳的白钨精矿回收率为68.00%,白钨矿分离指数为2.83,可实现白钨矿在较高精矿回收率的前提下与方解石的有效分离;而在白钨矿-萤石人工混合矿的浮选分离试验中,在pH值11.0时,取得的萤石精矿回收率为78.20%,分离指数为3.51,理论上可以实现白钨矿与萤石的分离。Fe-BHA用于香炉山白钨矿实际矿石的粗选验证试验,在适宜条件下,可获得产率为30.53%、精矿中WO3品位为1.56%、回收率为63.50%的白钨精矿,相比同条件下单独使用苯甲羟肟酸的浮选结果较好。白钨矿的红外光谱证明了Fe-BHA在白钨矿表面化学吸附的存在。

The flotation separation of scheelite with the Fe-BHA as the collector

A metal ion chelate, Fe-BHA, was synthesized by mixing FeCl3 with Benzohydroxamic acid (BHA) in a certain proportion. When the Fe-BHA was used to separate the scheelite-calcite artificially mixed simples, the best recovery of scheelite was 68.00% and the separation index of scheelite was 2.83, at pH7.7, which meant scheelite could be effectively separated from calcite at a quite high recovery in the concentrate; And when using the Fe-BHA in the scheelite-fluorite artificially mixed simples separation, fluorite could be separated from scheelite with the fluorite recovery of 78.20% and the fluorite separation index of 3.51, at pH11.0. The WO3 recovery of 63.50% and the WO3 grade of 1.56% in the concentrate could be got when using the Fe-BHA in the roughing tests of Xianglushan scheelite, which were much higher than those of using the BHA only. The presence of the chemisorption of the Fe-BHA on the surface of scheelite was verified by the Fourier Transform infrared spectroscopy (FTIR) analyses.