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采用XRF,XRD,XPS,SEM-EDS,Mossbauer等手段对炼铜反射炉水淬渣进行了工艺矿物学研究,结果表明,渣中含铜1.06%,主要以冰铜存在;TFe含量为36.41%,其中Fe2SiO453.5%,Fe3O432.5%,Fe2O314.0%。Fe的存在形态决定了在酸浸中铁会大量消耗酸,其浸出率可达82.6%,影响了铜的浸出,而加入H2O2可有效地抑制铁的浸出,铜的浸出率相应提高。在60℃、浸出30 min、搅拌速度500 r/min、酸浓度60 g/L、双氧水100 L/t时,铜的浸出率可达66.9%;双氧水的加入对电位有影响,对铜和铁的浸出分别起到促进和抑制作用,高电位更有利于铜的浸出。
The technological mineralogy of water-quenched slag of copper-making reverberatory furnace was studied by means of XRF, XRD, XPS, SEM-EDS and Mossbauer. The results show that the slag contains 1.06% Cu, mainly exists as matte; TFe content is 36.41% , Of which Fe2SiO453.5%, Fe3O432.5%, Fe2O314.0%. The existence form of Fe determines that iron will consume a lot of acid in acid leaching, the leaching rate may reach 82.6%, affecting the leaching of copper, while adding H2O2 can effectively inhibit the leaching of iron and the leaching rate of copper increases correspondingly. The leaching rate of copper reached 66.9% when leaching at 60 ℃ for 30 min, the stirring speed was 500 r / min, the acid concentration was 60 g / L, and the hydrogen peroxide was 100 L / t. The addition of hydrogen peroxide affected the potential of Cu and Fe The leaching played the role of promotion and inhibition, respectively. The high potential is more conducive to the leaching of copper.