Utilization of Waste Copper Slag to Produce Directly ...
The chemical compositions of copper slag used in this study are given in Table 1. The total iron content of copper slag is 39.85%, and the content of SiO 2, Cu, Pb and Zn are 30.81%, 0.33%, 0.22% and 2.81%, respectively. The minerals of copper slag determined by X-ray diffraction (XRD) are mainly fayalite and magnetite, as shown in Fig. 1.