Abstract
In this study, a 70% H2–30% N2 mixture was used to simulate waste cooking oil pyrolysis gas products for reduction of copper slag. The microstructure of slag before and after reduction was analyzed, and the distribution characteristics of copper and iron components during the reduction process were evaluated. The results show that there is always a sedimentation behavior of the matte in the slag during the cleaning process. The residual matte in the cleaned slag is mainly related to chemically dissolved copper. A clear layering was observed between slag and matte after the reduction process. These findings provide support for the recovery of matte from copper slag using waste cooking oil as a green reductant.
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