【摘要】 本文用动力学、表面分析技术方法研究在黄铁矿表面磷酸铁膜形成的可能性以及磷酸铁膜抑制黄铁矿的氧化作用.黄铁矿经0.3mol·l^-1H₂O₂+0.01mol·l^-1NaH₂PO₄+0.05mol·l^-1NaAC（pH5.0）淋洗后,在其表面可形成一层磷酸铁膜,该膜能显著抑制黄铁矿的进一步氧化.结果还表明,在H₂O₂作用下,黄铁矿氧化有自催化氧化的特征,其氧化产物Fe³⁺能加快黄铁矿的氧化速率.更多还原

【Abstract】 In this study, the feasibility of formation of iron phosphate coating on the pyrite surfaces and its role of the suppression of pyrite oxidation were carried out by utilizing kinetics and surface analysis techniques. After leaching with a solution containig 0.3 mol·l-1H2O2+0. 01mol·l-1NaH2PO4+0.05mol·l-1NaAc(pH=5),iron phosphate coating formed on the pyrite surfaces, which could reduce the rate of pyrite oxidation greatly. In addition, the results proved that pyrite oxidation was characterized by the au-tocatalytic process. Fe3+released from the oxidation could accelerate the rate of pyrite oxidation.更多还原