Abstract
The stagnation of solid magnetite at the interface between slag and matte is one of the big issues in the copper smelting process using a flash furnace. The magnetite inhibits the absorption of the suspended matte in the slag phase into the matte phase, which leads to copper loss. However, interfacial phenomena between magnetite and matte are complicated. Therefore, it is necessary to clarify the reaction behavior between magnetite and the matte and to find factors that reduce the reaction rate. In a previous study, we found that the generation of SO2 gas at the interface between magnetite and matte is a factor that reduces the dissolution rate of magnetite using in-situ observation [1]. In this study, we aim to evaluate the dissolution rate of bulk magnetite into the bulk matte. Furthermore, the gas behavior was clarified from the reaction between magnetite and matte considering the effect of the matte composition and reaction time.
NSTL