시뮬레이션 모델을 활용한 다원계 슬래그와 용융 황화물 간의 결합반응의 속도론적 해석

Abstract

Copper smelting slag contains less than 2 mass% of Cu oxide and 30–50 mass% of FexO. Each year, the grade of copper ore decreases while the amount of slag generated in the copper smelting process increases. In this study, a coupled reaction model to simulate the reaction between multicomponent slag and FeS-based matte was developed using reported thermodynamic data and double film theory for the recycling of copper smelting slag. The activity coefficients of oxides in the multicomponent slag were calculated using a regular solution. The activity coefficients of Cu2O in the slag and those of FeS, Cu2S, and CaS in the FeS-based matte used previously reported data. The behavior of Cu between slag and matte was confirmed by comparing the simulated results and the reported solubility of Cu in the slag within 1473 K to 1573K. In addition, the effect of the input amount of FeS on the copper content of the slag was verified by comparison of the reaction model and experimental results. Using the reaction model, the influence of the initial ratio of FeO/SiO2 of the slag, temperature, and matte composition on the behavior of Cu in the slag and matte were investigated.