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用分批浮选试验和表面分析方法(XPS和ToF-SIMS光谱)和FTIR红外光谱研究了亚硫酸氢钠对被铜活化的闪锌矿的可浮性影响。应用不同方法研究了亚硫酸根离子与捕收剂和闪锌矿表面的作用机理。研究结果表明,在用氮气和空气作为浮选气体,用黄药作捕收剂,pH9浮选时,亚硫酸氢钠会抑制被铜活化的闪锌矿。试验结果还证实,亚硫酸氢钠不仅与闪锌矿表面反应,而且还会与吸附状态的黄药反应。根据本试验所获得的结果和以前我们试验所取得的结果,提出了亚硫酸氢钠抑制被铜活化的闪锌矿的机理。即亚硫酸氢钠分解被铜活化的闪锌矿表面上的黄原酸铜组分和分解闪锌矿表面上的似硫化铜组分。
The flotation of copper-activated sphalerite by sodium bisulfite was studied by batch flotation and surface analysis (XPS and ToF-SIMS) and FTIR spectroscopy. The mechanism of action of sulfite ions on the surface of collector and sphalerite has been studied by different methods. The results show that sodium bisulfite suppresses sphalerite activated by copper when flotation at pH 9 with nitrogen and air as the flotation gas, with xanthate as a collector. The test results also confirmed that sodium bisulfite not only reacted with the surface of sphalerite but also reacted with xanthate adsorbed. Based on the results obtained in this experiment and the results obtained in our previous experiments, the mechanism of sodium bisulfite in inhibiting sphalerite activated by copper was proposed. That is, sodium bisulfite decomposes the copper xanthate component on the surface of the sphalerite activated by copper and decomposes the copper sulfide component on the surface of the sphalerite.