IMPROVED METHOD FOR SOLDER PRODUCTION Russian patent published in 2022 - IPC C22B7/04 C22B9/10 C22B5/02 C22B13/02 C22B15/00 C22B25/06 

FIELD: metallurgy.

SUBSTANCE: invention relates to the production of non-ferrous metals, in particular to the production of solder products, to joint production of copper and solder flows of primary and secondary raw materials. In a method, first solder refining slag (16, 24) is provided, containing at least 12 wt.% of tin and lead together and at most 10.0 wt.% of copper and nickel together. At the same time, first solder refining slag (16) is at least partially reduced (600) with the formation of first metal composition (18) of rough solder and second solder refining slag (19) with subsequent separation of second solder refining slag (19) from first metal composition (18) of rough solder. Second solder refining slag (19) is partially reduced (700) with the formation of second metal composition (10) based on lead-tin and second spent slag (20) with subsequent separation of second spent slag (20) from second metal composition (10) based on lead-tin. At the same time, at a stage f), copper-containing raw materials (50) are added (700), preferably before reduction of second solder refining slag (19).

EFFECT: obtainment of a rough solder product of high purity in combination with production of a purified copper product for subsequent electrolytical purification, high extraction of tin and lead in the product.

18 cl, 24 tbl, 1 dwg, 1 ex