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本文给出了有、无硫化钠存在时,黄铜矿和黄铁矿的无捕收剂浮选行为。研究表明,黄铜矿具有良好的自诱导可浮性,浮选的电位范围和pH范围较宽;弱酸性和碱性介质中,黄铁矿自诱导浮选差,没有任何可浮电位范围。然而,硫化钠的添加,明显促进了黄铁矿的无捕收剂浮选。天然矿石浮选试验表明,自诱导和硫诱导浮选技术能够有效地浮选和分离黄铜矿和黄铁矿。通过HS~-离子吸附量的测定、矿物表面中性硫量提取分析、矿浆电位测试和量子化学计算,较详细地研究了黄铜矿和黄铁矿无捕收剂浮选的机理。研究结果表明,矿物表面中性硫是主要疏水体。
In this paper, we give the non-collector flotation behavior of chalcopyrite and pyrite in the presence and absence of sodium sulfide. The results show that chalcopyrite has a good self-induced floatability and a wide range of potential and pH range for flotation. In weakly acidic and alkaline media, the self-induced flotation of pyrite is poor with no floating potential range. However, the addition of sodium sulfide evidently promoted collectorless flotation of pyrite. Natural ore flotation experiments show that self-induced and sulfur-induced flotation techniques can effectively flotation and separation of chalcopyrite and pyrite. The mechanism of flotation without chalcopyrite and chalcopyrite in chalcopyrite and pyrite was studied in detail by measuring the amount of HS ~ - ion adsorption, analyzing the neutral sulfur content of mineral surface, testing pulp potential and calculating quantum chemistry. The results show that the mineral surface neutral sulfur is the main hydrophobic body.