ADVANCED PRODUCTION OF TIN INCLUDING A COMPOSITION CONTAINING TIN, LEAD, SILVER, AND ANTIMONY Russian patent published in 2022 - IPC C22B9/02 C22B11/00 C22B13/06 C22B25/08 C22C13/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to the extraction of silver in production of tin, namely to the separation of silver through fractional crystallisation. Method includes separating, by fractional crystallisation (300), a molten mixture (8) of crude tin containing lead and silver into a first liquid silver-enriched discharged product (9) on the side of the liquid fraction produced at the crystallisation stage, and a first tin-enriched product (10) on the side of the crystalline fraction produced at the crystallisation stage. The metal composition produced in the form of the first liquid silver-enriched discharge product (9) herein consists, as calculated by dry weight, of 6.0 to 27.5% wt. lead, 72.5 to 91% wt. tin, 95.0 to 99.0% wt. combined lead and tin, 0.75 to 4.50% wt. silver, and at least 0.24% wt. antimony.

EFFECT: concentration of silver in the discharged product is increased.

37 cl, 1 dwg, 10 tbl, 1 ex