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roasting process of iron ore

Roasting is a process of heating of sulphide ore to a high temperature in presence of air It is a step of the processing of certain ores More specifically roasting is a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal components Often before roasting the ore has already been partially purified eg by froth flotation The concentrate is mixed with other materials to facilitate the process The technology is useful but is also a serious source of air pollu

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