Suppressing SO3 formation in copper smelting flue gas by ejecting pyrite into flue

Zhang, Qin; Chen, Jiacheng; Wu, Yanan; Liu, Haipeng; Gu, Bin; Hu, Shen; Yang, Hongying

doi:10.1007/s11356-020-10796-y

Cited by 5 publications

(1 citation statement)

References 17 publications

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“…The reduction is the most direct way to reduce Fe3O4 in the slag by adding a reductant. The generated FeO phase is combined with SiO2 to form a low melting point fayalite phase, which improves slag fluidity [17][18][19][20]. Zhou et al [21] investigated the metallic copper settling from converter slag during the reduction process, showing that adding the appropriate reductant for the reduction Fe3O4 into FeO is beneficial to copper settling from converter slag.…”

Section: Introductionmentioning

confidence: 99%

Matte-slag separation behavior as a function of iron phase reduction in copper slag

Liu

Wei

Zhou

et al. 2023

J min metall B Metall

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The Isa smelting furnace discharges the matte and slag in the same tapping hole. As a result, an electric furnace needs to clean the slag. In the present study, the copper slag cleaning in an electric furnace, particularly the separation of the matte from the slag during the reduction process, was investigated. For Fe3O4 to FeO, the foaming slag in the melt disappeared when the Fe3O4 content was less than 10%. With the formation of the metallic iron, the foaming slag formed again, hindering the sedimentation of the matte. When the anthracite dosage increased to 2.61%, the copper content in the slag increased to 9.46%. The microstructure of the slag and the existence of the metallic iron found in the slag were analyzed in detail. The results obtained in this study provide a theoretical basis for the reasonable control of the transformation of Fe3O4 during the copper slag cleaning.

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