TY - JOUR T2 - Journal of Mining and Metallurgy, Section B: Metallurgy TI - Matte separated behavior from slag during the cleaning process by using waste cooking oil as carbon neutral reductant VL - 57 IS - 3 SP - 379 EP - 388 PY - 2021 DA - 03 September 2021 DO - 10.2298/JMMB210407034W UR - https://doi.org/10.2298/JMMB210407034W AU - Wang, L.-C. AU - Wei, Y.-G. AU - Zhou, S.-W. AU - Li, B. AU - Wang, H. AD - a Kunming University of Science and Technology, Faculty of Metallurgical and Energy Engineering, Kunming, China; b Kunming University of Science and Technology, State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, China; AB - As a waste resource, waste cooking oil (WCO) has not been widely used. Based on the characteristics of WCO cracking, this study proposed to replace fossil-based reductant with WCO for copper slag cleaning, to solve the problem of carbon neutralization in this process. Copper slag cleaning experiments were carried out in a lab-scale electric furnace. The matte separated behavior from slag and the distribution of matte in slag were studied. The results showed that the Fe3O4 content decreases from 12.9 to 3.5 wt.% by injecting 2.2 mL of WCO into 300 g copper slag at 1250 °C. The distribution of copper content in slag is gradient along the vertical direction. In the reduction stage, the excessive Fe3O4 is reduced and the fluidity of slag is improved. When the precipitation time is above 60 minutes, the copper content in the middle and upper slag is reduced to 0.57 wt.%, which realizes the copper slag cleaning by using WCO. KW - Waste cooking oil KW - Reductant KW - Copper slag KW - Matte N1 - Correspondence Address: S.-W. Zhou; a Kunming University of Science and Technology, Faculty of Metallurgical and Energy Engineering, Kunming, China; b Kunming University of Science and Technology, State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, China; email: swzhou90@126.com N1 - J. Min. Metall. Sect. B-Metall., 57 (3) (2021) 379-388. doi:10.2298/JMMB210407034W PB - Technical Faculty in Bor SN - 1450-5339 (ISSN) LA - English J2 - J. Min. Metall. Sect. B Metall. M3 - Article ER -