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复杂硫化矿石优先浮选中黄铁矿的抑制是世界许多矿床涉及的共同问题。矿物学上的差异使得对某一特定矿床优化的黄铁矿抑制体系常常不能成功地应用于另一矿床。对从澳大利亚 (A、B、C和D)和北美 (E) 5个不同地方的铜矿石进行了优先浮选试验。浮选试验采用选择性铜捕收剂异丙基硫代氨基甲酸乙酯和黄铁矿抑制剂石灰 -氰化物及焦亚硫酸钠。粗选矿浆电位用黄铜矿及黄铁矿纯矿物电极连续监控。对优先浮选试验用水作了分析 ,以确认可能影响特定抑制剂性能的溶液化学差异。对试验的 4种 (A、B、D和E)矿石用 6mg/l氰化钠和 5 0 0 g/t石灰达到最佳浮选选择性。对矿石C ,5 0 0g/t焦亚硫酸钠最佳。抑制剂浓度超过 6mg/l氰化钠和 5 0 0g/t焦亚硫酸钠时 ,浮选选择性和铜回收率急剧下降。据信矿石浮选选择性的差别与各矿床矿物反应活性的差异有关。
The suppression of pyrite in preferential flotation of complex sulphide ores is a common problem involved in many deposits in the world. Mineralogical differences make it often unsuitable for a pyrite suppression system optimized for a particular deposit to be applied to another deposit. Preferential flotation tests were conducted on copper ores from five different locations in Australia (A, B, C and D) and North America (E). Flotation experiments using a selective copper collector isopropyl thiocarbamate and pyrite inhibitors lime-cyanide and sodium metabisulfite. Crude pulp potential with chalcopyrite and pyrite pure mineral electrode continuous monitoring. Preferential flotation test water was analyzed to identify chemical differences in solutions that could affect the performance of a particular inhibitor. The four fines (A, B, D and E) tested achieved the best flotation selectivity with 6 mg / l sodium cyanide and 500 g / t lime. For ore C, 500 g / t sodium metabisulfite is the best. Flotation selectivity and copper recovery dropped dramatically when the inhibitor concentration exceeded 6 mg / l sodium cyanide and 500 g / t sodium metabisulfite. It is believed that the difference in ore flotation selectivity is related to the difference in mineral reactivity of the various deposits.