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In pyrometallurgy, roasting is primarily conducted through three methods: sulfurizing roasting, oxidizing roasting, and chloridizing roasting. Sulfurizing roasting involves adding sulfur to convert metal oxides into sulfides, while oxidizing roasting helps in transforming sulfide ores into oxides by introducing oxygen. Chloridizing roasting utilizes chlorine to convert metal oxides into chlorides, facilitating further extraction processes. Each method is tailored to enhance the recovery of specific metals from their ores.

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