Matte separated behavior from slag during the cleaning process by using waste cooking oil as carbon neutral reductant

Wang L.-C.; Wei Y.-G.; Zhou S.-W.; Li B.; Wang H.

doi:10.2298/JMMB210407034W

Journal of Mining and Metallurgy. Section B: Metallurgy (Jan 2021)

Matte separated behavior from slag during the cleaning process by using waste cooking oil as carbon neutral reductant

Wang L.-C.,
Wei Y.-G.,
Zhou S.-W.,
Li B.,
Wang H.

Affiliations

Wang L.-C.: Kunming University of Science and Technology, Faculty of Metallurgical and Energy Engineering, Kunming, China + Kunming University of Science and Technology, State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, China
Wei Y.-G.: Kunming University of Science and Technology, Faculty of Metallurgical and Energy Engineering, Kunming, China + Kunming University of Science and Technology, State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, China
Zhou S.-W.: Kunming University of Science and Technology, Faculty of Metallurgical and Energy Engineering, Kunming, China + Kunming University of Science and Technology, State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, China
Li B.: Kunming University of Science and Technology, Faculty of Metallurgical and Energy Engineering, Kunming, China + Kunming University of Science and Technology, State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, China
Wang H.: Kunming University of Science and Technology, Faculty of Metallurgical and Energy Engineering, Kunming, China + Kunming University of Science and Technology, State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming, China

DOI: https://doi.org/10.2298/JMMB210407034W
Journal volume & issue: Vol. 57, no. 3
pp. 379 – 388

Abstract

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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.

Published in Journal of Mining and Metallurgy. Section B: Metallurgy

ISSN: 1450-5339 (Print); 2217-7175 (Online)
Publisher: Technical Faculty, Bor
Country of publisher: Serbia
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://www.doiserbia.nb.rs/journal.aspx?issn=1450-5339

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