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Processing of metallurgical slag

Manufacture of various-purpose electronic devices results in accumulation of electronic scrap. One of the approaches to processing e-scrap is smelting which produces waste in the form of slag containing many recoverable valuable components. With a view to developing processing technique for slag after e-scrap smelting, relevant studies were carried out on a slag sample containing copper at a mass fraction of 9.8±0.4%. Copper in the sample was mainly represented by a metal phase. From the analysis of information on processing of the similar feedstock, the objectives set for the studies included: the analysis of recoverability of end products at the stage of ore pretreatment; the development of optimum conditions for flotation of escrape smelting slag. The proposed processing technology involves selective grinding of slag to the size of -0.6 mm with extraction of metal phase to concentrate with subsequent milling and flotation of the ground product. The studies demonstrate possibility of obtaining a copper concentrate with the mass fraction of 72.91% of copper at its recovery of 16.14% at the stages of ore pretreatment. Flotation produces a copper concentrate with the mass fraction of 16.3 % of Cu at its recovery of 73.63%. The loss of copper with tailings in the proposed technology totals 2.85%. It is found that the promising trend of producing a higher quality concentrate is flotation of thick pulp in the accumulation mode, with periodic removal of froth from flotation cell.

Keywords: electronic scrap, slag, copper, metal phase, selective grinding, screening, flotation, processing flowsheet.
For citation:

Uporova I. V., Penkov P. M., Bekchurina E. A. Processing of metallurgical slag. MIAB. Mining Inf. Anal. Bull. 2024;(3):141-154. [In Russ]. DOI: 10.25018/0236_1493_2024_ 3_0_141.

Acknowledgements:
Issue number: 3
Year: 2024
Page number: 141-154
ISBN: 0236-1493
UDK: 622.765
DOI: 10.25018/0236_1493_2024_3_0_141
Article receipt date: 22.12.2023
Date of review receipt: 25.01.2024
Date of the editorial board′s decision on the article′s publishing: 10.02.2024
About authors:

I.V. Uporova1, Engineer, e-mail: uporova2013@mail.ru,
P.M. Penkov1, Engineer, e-mail: Pavel.Penkov@m.ursmu.ru,
E.A. Bekchurina1, Cand. Sci. (Eng.), Assistant Professor, e-mail: efalej@yandex.ru, ORCID ID: 0000-0001-7304-2824,
1 Ural State Mining University, 620144, Ekaterinburg, Russia.

 

For contacts:

I.V. Uporova, e-mail: uporova2013@mail.ru.

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