Abstract:In order to ascertain the phase composition of zinc smelting slag, the X-ray diffraction (XRD) and energy dispersive spectrum (EDS) were adopted. The phase analysis results indicated that the phase composition of zinc smelting slag could be accurately determined by XRD and EDS which were associated with scanning electron microscope(SEM). That is,the X-ray powder diffraction patterns of multi-phase mixed smelting slag were compared and analyzed with the standard spectral lines of phases,and the content of elements was determined according to the micro area diffraction EDS of scanning electron microscope. It provided basis for the comprehensive utilization of smelting slag. Under the experimental conditions, it was found that the oxygen powder acid leaching residue sample of zinc smelting slag mainly included Pb, S, O and Zn. The main phases were PbSO4 and ZnS. The elements in copper-cadmium slag mainly included O, Zn, Al and Cd, and the main phases were ZnS and ZnSO4·6H2O. The cadmium existed in copper-cadmium reside in the form of CdS, CdSO4, CdO and Cd. The main elements in bag filter oxide powder were Zn, O, Pb and S, and the main phases were ZnO and ZnS.
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