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Processing Of Tin Ore

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It is called black tin Smelting Black tin is mixed with carbon and smelted in a reverberatory furnace The ore is reduced to the metallic state while SiO 2 is removed as slag SnO2 2C Sn 2CO CaCO3 CaO CO2 CaO SiO2 CaSiO3 Slag Molten metal is cast into ingots or blocks It is known as block tin and contains about 995 of metallic tin