摘要
The effect of sodium butyl xanthate (NaBX) and dodecylamine (DDA) as combined collector on the sulphidizing flotation of copper oxide was investigated by flotation test, fluorescent pyrene probe, zeta potential, and infrared spectroscopy analyses. The micro-flotation results show that combined use of NaBX+DDA yields better effect than using NaBX at pH 7-11 only, and the optimal molar ratio of NaBX to DDA is 2: 1. The actual ores flotation shows that when the dosage of NaBX+DDA is (100+54) g/t, the copper concentrate grade and recovery are 15.93% and 76.73%, respectively. The fluorescent pyrene probe test demonstrates that the NaBX+DDA can reduce the micelle concentration in the pulp. The zeta potential and the infrared spectroscopy analyses indicate that chemical adsorption, hydrogen-bonding and electrostatic interaction can help to adsorb NaBX+DDA on the surface of malachite. Meantime, copper xanthate and copper-amine complexes may be generated during the adsorption process.
通过浮选试验、芘荧光探针、zeta电位和红外光谱分析,研究组合捕收剂丁钠黄药(NaB X)和十二胺(DDA)对氧化铜浮选的影响。单矿物浮选试验表明,在pH7～11条件下,NaBX+DDA的浮选效果优于NaBX,其中NaBX与DDA的最佳摩尔比为2:1。实际矿的浮选试验表明,NaBX和DDA的用量为(100+54) g/t时,精矿中铜的品位和回收率分别为15.93%和76.73%。芘荧光探针结果表明,NaBX+DDA可降低胶束在矿浆中形成的浓度。Zeta电位和红外光谱测试结果表明,NaBX+DDA通过化学吸附、氢键吸附和静电吸附作用在孔雀石表面,并生成黄原酸铜和铜胺络合物。
基金
Projects(51504053,51374079)supported by the National Natural Science Foundation of China
