Effect of Cooling Rate and Slag Modification on the Copper Matte in Smelting Slag

• DOI: 10.1007/s42461-020-00274-x
• Publication Date: 2020-07-31T18:03:41Z
• Authors: Xiang Gao; Zhuo Chen; Junjie Shi; Pekka Taskinen; Ari Jokilaakso
• Keywords: Slag (welding); Copper slag; Flash smelting; Ladle

Abstract The amount of copper flash smelting slag has increased during the recent years along with an increasing slag-to-metal ratio. During tapping, some sulfide is mechanically entrained. As a result, it necessary to recover matte from by suitable methods. At present, most common way slow, controlled cooling in transfer ladle. However, research on detailed effects slow and function modification rare. This paper described experiments that were performed at different rates (0.5, 1.5, 3, 7 °C/min), without additive. A characterization copper-rich phase its particle size was subsequently made using SEM-EDS micrographs image analysis software. With decrease rate, became larger. addition gypsum carbon as modifier affected slightly, chemical composition modified compared