A method of separating and recovering iron from waste nonferrous slag discharged in the smelting process of nonferrous metals such as copper, zinc and lead by physicochemical sorting

摘要

The present invention relates to a method for concentrating and recovering iron from waste non-ferrous slag generated in the smelting process of copper, zinc and lead non-ferrous metals, and more specifically, a reducing agent is added to the waste non-ferrous slag. After adding the reaction catalyst, alumina (Al2O3), limestone (CaO), magnesium oxide (MgO), silica (SiO2), zinc oxide (ZnO), copper oxide (CuO), in the waste nonferrous slag by solid reduction reaction, Then, the iron oxide bonded in an amorphous state with lead oxide (PbO) or the like is changed into a reduced iron (Fe) and iron carbide (Fe2C) crystal structure, crushed and reduced iron and carbonized by solid reduction reaction. After separating iron alone, wet magnetic sorting and dry magnetic sorting according to the size of the particles, and the total amount of non-ferrous metals such as copper, zinc, lead, etc. in the magnetic material is 1% or less Copper and zinc separated and recovered as concentrates The present invention relates to a method for concentrating and recovering iron from waste nonferrous slag generated in the smelting process of lead and lead nonferrous metals. [Selection] Figure 1