FLOTATION OF COPPER SMELTER SLAGS INTENSIFIED BY IMPACT CRUSHING
Gorlova O.E. Sinyanskaya O.M. Tusupbekova T.Sh. Kolodezhnaya E.V.
2023Ore and Metals Publishing house
Tsvetnye Metally
2023#2023Issue 17 - 16 pp.
This paper examines the mineral and chemical composition of converter slags generated by Balkhash Copper Smelter, as well as the forms in which copper is present in them. The paper describes the results of flotation of the above product, which was prior subjected to fine crushing in jaw and hammer crushers. The paper features a comparative analysis that looks at the size distribution and the distribution of the key valuable components by grain size of the slag precrushed in jaw and hammer crushers. It is shown that the different breaking techniques realized by these crushers influence the size distribution of the crushed product, the share of particles smaller than 0.071 mm and the distribution of copper by fraction. The authors looked at the grinding kinetics of the copper smelter slags pre-crushed in the above specified crushers and compared the share of –0.071 mm particles, as well as that of –0.045 mm particles (which are the finest fraction). It was established that the optimum hammer crushing duration is 45 min. A longer duration leads to overgrinding. At the same time for the jaw crusher, the overgrinding effect and the accumulation of the –0.045 mm particles become expressed if the crushing cycle lasts for 60 min. Flotation of the precrushed converter slags resulted in a quality concentrate containing 27.5 to 39.0 wt % copper (depending on the slag crushing duration). In all cases, the recovery of copper was every time higher (by 5% on average) for slags pre-crushed in the hammer crusher. It is pointed out that impact crushing of copper smelter slags significantly intensifies the flotation process. This should be taken into consideration when optimizing the processing schemes.
breaking technique , copper , copper concentrate , copper smelting slags , flotation enrichment , grinding , hammer crusher , impact crushing , jaw crusher , opening of the grains
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Department of Geology, Mine Surveying and Minerals Processing, Nosov Magnitogorsk State Technical University, Magnitogorsk, Russian Federation
IPKON, Russian Academy of Sciences, Moscow, Russian Federation
KazGidroMed, Karaganda, Kazakhstan
Ural Omega JSC, Magnitogorsk, Russian Federation
Department of Geology
IPKON
KazGidroMed
Ural Omega JSC
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