Journal
RESOURCES CONSERVATION AND RECYCLING
Volume 182, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.resconrec.2022.106316
Keywords
Copper matte smelting slag; Copper droplets; Continuous recovery; Directional separation; Application experiment
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A new method for continuously recovering copper droplets from copper matte smelting slag via super-gravity was proposed and its efficient recovery of copper resources was validated through experiments.
Copper matte smelting slag inevitably entrains amounts of copper droplets, which brings about a high loss of copper in copper slag. In this study, a new method was proposed to continuously recover copper droplets from copper matte smelting slag via super-gravity. Motion behavior of copper droplets indicated that a long time of 60-120 min was needed for settling of copper droplets in copper matte smelting slag at 1573-1673 K under gravity. In contrast, copper droplets were directionally separated from copper matte smelting slag within 3-5 min at 1523-1573 K via super-gravity with a high Cu recovery ratio of 97.98%. Moreover, the application experiment of continuous recovery of copper droplets from copper matte smelting slag was carried out in a laboratory-scale apparatus. On this basis, this study provides a cleaner approach to efficiently recover copper resources in copper matte smelting slag with no additives and no additional heat.
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