Technical University of UGMK (Ekaterinburg, Russia):
Mamonov S. V., Head of Chair, Candidate of Engineering Sciences, Mamonov_SV@umbr.ru

JSC «Uralmekhanobr» (Ekaterinburg, Russia):
Gazaleeva G. I., Deputy CEO for Analytical Work, Doctor of Engineering Sciences, gazaleeva_gi@umbr.ru
Dresvyankina T. P., Senior Researcher
Volkova S. V., Senior Researcher

This paper deals with innovative prospects in copper smeltery final dump slag processing metallurgical results improvement, based upon slag slow cooling and ultrafine grinding in bead mills. It was established, that temperature regime and cooling rate are of crucial importance in final dump slag slow cooling process. It is shown that slow cooling leads to qualitative and quantitative changes in slag structure — size of sulfide particles is increased severalfold, and copper is redistributed in mineral forms. Regularities in slowly cooled slag processing metallurgical results improvement have been determined with respect to pH drop. Beneficiation of this type of slag under laboratory and commercial-scale conditions permits to produce copper concentrate with copper mass fraction of 20 %, copper recovery being 65–74 %. It has been proved that slag slow cooling technology with its subsequent processing at an operating beneficiation plant provides for increase in copper recovery into copper concentrate by 15–22 %, also increasing grinding equipment throughput rate by 25 %, and copper minerals liberation degree — by 25—30 %. Possible final dump slag processing metallurgical results improvement has been demonstrated by way of example of Vanukov furnace and high-furnace final dump slags with application of ultrafine grinding in bead mills.

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