黄铁矿氧化抑制行为及机理研究

Study on Depression Behavior and Oxidation Mechanism of Pyrite

利用纯矿物浮选试验研究了次氯酸钠、过硫酸铵及含钙药剂 CK等氧化剂对黄铁矿、黄铜矿可浮性的影响 ,并采用实际矿石进行了验证。根据黄铁矿的电化学性质、接触角测定和黄药在矿物表面的吸附量测定 ,分析了黄铁矿在氧化状态下受抑时的表面性质。结果表明 ,氧化剂能减小黄铁矿的接触角 ,增大亲水性 ,阻止或减少黄药在矿物表面的吸附从而使黄铁矿受到抑制。

Effects of hypochlorite sodium,persulfate ammonium and calcareous agent CK on flotation behavior of pyrite and chalcopyrite were studied with pure minerals test.The rationality of the ersults was proved by using actual minerals.According to galvano chemistry,measurement results of contact angle,adsorption of xanthate on the mineral surface,and the surface properties of depressed pyrite in oxidized state were analyzed.The results show that the oxidants can reduce contact angle of pyrite and increase its hydrophilicity,prevent or reduce adsorpton of xanthate on mineral surface,thus the flotation of pyrite was despressed.