Method of tin manufacturing from cassiterite concentrate. RU patent 2333268.

FIELD: metallurgy.

SUBSTANCE: invention concerns tin metallurgy field and can be used for tin manufacturing while treatment of cassiterite concentrates. Method of tin manufacturing from cassiterite concentrate with content of 35-50% SnO₂ includes batch preparation by blending of tin concentrate with coal and flux additive. In the capacity of flux additive it is used sodium carbonate and sodium nitrate. Melting is implemented at temperature 850-1000°C during 2 hours. For mentioned concentrate it is kept up following mass ratio: concentrate : coal : sodium carbonate : sodium nitrate, equal to 1 : (0.2-0.25) : (0.12-0.15) : (0.06-0.08). It allows without concentrate pretreatment to provide tin manufacturing of 98% purity at less in comparison with tradition approach, temperature.

EFFECT: simplification of manufacturing scheme, process temperature reduction at high enough purity of receiving product.

2 ex

IPC classes for russian patent Method of tin manufacturing from cassiterite concentrate. RU patent 2333268. (RU 2333268):

C22B5/10 - by solid carbonaceous reducing agents

C22B25/02 - by dry processes

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