draw the furnace which is used for roasting
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The most important operations are roasting, smelting, and refining. Roasting, or heating in air without fusion, transforms sulfide ores into oxides, the sulfur escaping as sulfur dioxide, a gas. Smelting (q.v.) is the process used in blast furnaces to reduce iron ores.
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Roasting is carried out in reverboratory furnace because it is the most important part of metal extraction in the presence of Oxygen.
Roasting:- it is the process of heating metal in the presence of excess of Oxygen.
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