Cyanide is a naturally occurring chemical that ... What is the role of cyanide in mining? ... is used to dissolve and separate gold from ore. [3] The process used to ...

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Iron: Iron (Fe), chemical element and one of the transition elements, the most-used and cheapest metal. ENCYCLOPÆDIA ... Iron ore mining at Kiruna, Sweden.

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The iron occur in Fe-mineral ores contains impurities of Phosphorus, sulphur and high alkali as well as impregnations of waste rock. To produce a metallurgy treatable ...

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