Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) General Subjective Type
Published on: August 11, 2026

Why sulphide ores are first roasted before going to smelting ?

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Sol. Carbon is usually used for the reduction of ores and if sulphide ores are used, it will form CS 2 which is difficult to get rid off. Therefore, sulphide ores are first roasted to get metal oxides which are then reduced by carbon to give metal and CO 2 escapes easily into the air.

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