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14 cards from this deck
High-temperature processes to extract metals from ores
Unwanted materials separated from metals
500-2000°C
Process sustained by exothermic reactions alone
Calcining, Roasting, Smelting, Refining (CRSR)
Thermal decomposition by heating, drives off volatiles
Oxidation of metal sulfides at high temps (gas-solid)
Complete oxidation of sulfide with excess oxygen
Incomplete oxidation with limited oxygen
Reduction of metal oxides using carbon, produces molten metal
Coke or charcoal (carbon sources)
Removes impurities through thermal processes
Iron, copper, zinc, chromium, tin, manganese
High temps accelerate reactions dramatically
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