In order to facilitate the recycling of bismuth and antimony in the slag, the Brazilian tin smelting plant uses a three-electrode reduction smelting process. The materials handled by the plant are mixed, including: (1) Thailand's high-grade concentrate, with an average of more than 65% tin; (2) Bolivia's impure concentrate, containing 30%-60% Sn, in addition to sulfur, also contains more lead, arsenic, antimony, bismuth, and iron and gangue and other low melting point; (3) the high iron ore in Brazil, an average of 40% Sn, and a considerable number of mineral tantalum and niobium; (4) various Secondary materials such as residue and scum (about 20% of the total material).
In the picture, the tin tin process of the Brazilian tin company tin smelter
(The amount of calcined material is mostly used in the furnace, and the amount is less in the rotary kiln)
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