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用接触角测量、紫外光谱和微量浮选试验研究了外加电位对合成黄铜矿和天然黄铜矿在戊基钾黄药溶液中的润湿性的影响。矿物电极在固定电位下搅拌 10min后 ,测量了矿物电极表面的接触角。还研究了pH、PAX浓度和抑制剂 (氰化钠、硫化钠和MAA)浓度对合成黄铜矿接触角的影响。用己烷提取了黄铜矿表面上的疏水膜 ,并用紫外光谱对它进行了考查。为了确定黄铜矿浮选的电位范围 ,在pH 10时在控制电位下用天然黄铜矿进行了有捕收剂和无捕收剂浮选试验。接触角测量结果表明 ,合成黄铜矿和天然黄铜矿具有相近的润湿性。在pH 10和pH 7的 7·10 - 4 mol/LPAX溶液中 ,黄铜矿浮选的电位范围分别为 -0 2～ + 0 2V和 -0 2 5 + 0 3V。在 3种所研究的的抑制剂中 ,硫化钠表现最强的抑制作用。浮选结果表明 ,在没有捕收剂存在时 ,在矿浆电位为 -0 0 87～ + 0 2V时 (用铂电极测出的相对饱和甘汞电极的电位 )黄铜矿浮选 ,在 7·10 - 4 mol/LPAX溶液中 ,天然黄铜矿浮选的电位范围为 -0 2～ + 0 2 0 5V。
The effects of applied potential on the wettability of synthetic chalcopyrite and natural chalcopyrite in amyl potassium kraft solution were investigated by contact angle measurement, UV spectroscopy and trace flotation. The mineral electrode was stirred at a fixed potential for 10 min and the contact angle of the mineral electrode surface was measured. The effects of pH and PAX concentration and the concentration of inhibitors (sodium cyanide, sodium sulfide and MAA) on the contact angle of synthetic chalcopyrite were also studied. The hydrophobic membrane on the surface of chalcopyrite was extracted with hexane and examined by UV spectroscopy. In order to determine the potential range of chalcopyrite flotation, collectors and non-collector flotation tests were carried out with natural chalcopyrite at a controlled potential of pH 10. Contact angle measurement results show that synthetic chalcopyrite and natural chalcopyrite have similar wettability. The potential range of chalcopyrite flotation is -0.2 ~ +0 2V and -025 + 0 3V respectively in the 7 · 10 - 4 mol / LPAX solution of pH 10 and pH7. Of the three inhibitors studied, sodium sulfide showed the strongest inhibitory effect. Flotation results show that in the absence of collector, the chalcopyrite flotation at a pulp potential of -0 0 87 to +0 2 V (the relative saturated calomel electrode measured with a platinum electrode) The potential range of natural chalcopyrite flotation in the 10 - 4 mol / LPAX solution is -0.2 ~ +0 02 0 5V.