为了回收铜冶炼闪速熔炼炉渣和闪速吹炼炉渣中铜,首先利用X射线荧光光谱仪(XRF)对样品中的元素进行了分析,再利用X射线衍射仪(XRD)测定了闪速熔炼炉渣和闪速吹炼炉渣的物相组成,最后采用Rietveld全谱图拟合法分析出各个物相的含量.闪速熔炼炉渣的主要物相为Fe2SiO4和Fe3O4,其质量分数分别为75.04%和24.96%.闪速吹炼炉渣的主要物相为ZnFe2O4、Ca4Fe9O17、Ca2Fe2O5、CuFeO2、Cu2O、Cu和PbO,其质量分数分别为45.06%、10.01%、10.29%、6.29%、17.74%、9.12%和1.47%,闪速吹炼炉渣的主要物相与常规转炉吹炼炉渣的主要物相不同.在闪速熔炼炉渣样品和闪速吹炼炉渣样品中加入一定量的Al2O3,Rietveld全谱图拟合法分析出样品中Al2O3的质量分数与实际值一致,可见上述物相定量分析结果是准确的.研究结果能为闪速熔炼炉渣和闪速吹炼炉渣的回收利用提供基础数据.
In order to recover the copper from flash smelting slag and flash converting slag in copper smelting process, the elements in samples were firstly analyzed by X-ray fluorescence spectrometer (XRF).Then, the phase composition of flash smelting slag and flash converting slag was determined by X-ray diffractometer (XRD).Finally, the content of each phase was analyzed by Rietveld full spectrum fitting method.It was found that the main phases of flash smelting slag were Fe2SiO4 and Fe3O4 with mass fraction of 75.04% and 24.96%, respectively.The main phases of flash converting slag were ZnFe2O4, Ca4Fe9O17, Ca2Fe2O5, CuFeO2, Cu2O, Cu and PbO with content of 45.06%, 10.01%, 10.29%, 6.29%, 17.74%, 9.12% and 1.47%, respectively.In other words, the main phases of flash converting slag and conventional converter converting slag were different.Certain amount of Al2O3 was added to flash smelting slag sample and flash converting slag sample.The analytical results of Al2O3 content in sample by Rietveld full spectrum fitting method were in good agreement with the actual values.Therefore, the quantitative analysis results of phases above were accurate.It could provide basic data for the recycling and use of flash smelting slag and flash converting slag.
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