Abstract:The mineralogy study on copper smelting slag process of a company''s side blown furnace is completed by means of chemical analysis, chemical phase analysis, optical microscopy, scanning electron microscopy and automatic mineral analyzer (AMICS). The results show that the copper in the raw ore mainly exists in the form of matte and metallic copper, which has a high recyclability. The intergrowth of 12.18% copper phase aggregate is less than 0.01mm, and it is poor intergrowth with iron olivine and magnetite, which is easy to lose the tail. Only 47.80% of the iron in the raw ore is recyclable magnetite, and another 50.06% exists in the form of non-recyclable ferric silicate, and the magnetite contains more impurities, and 5.18% of the magnetite intergrowth is less than 0.01mm, so it is difficult to improve the quality of iron concentrate. In this paper, the particle size distribution of copper and iron components is investigated, the dissociation degrees of copper phase aggregate and magnetite are 69.32% and 50.79% respectively. It provides a reliable theoretical basis and improvement direction for the optimization of copper and iron separation technology.