TEMPERATURE PROFILE OF A SELF-HEATING OF NI-CU SULPHIDE ORE STOCKPILE AND IMPACT OF OXIDATION ON FLOTATION PERFORMANCE

World Mining Congress
This paper reports two aspects of reactivity of complex Ni-Cu sulphide ores: variations that result from stockpiling of a nickel-copper sulphide ore in the Sudbury area and its consequences on flotation behaviour, especially in terms of metal losses to scavenger tails. In relation to the first aspect, self-heating characteristics of the stockpile were carried out by monitoring the internal temperatures of the stockpile. Six heat sensors were installed with respect to external conditions in local weather during a 7-month period. Stockpile temperatures were mainly influenced by ambient temperature with some retardation effects. The maximum temperature recorded in the stockpile was 44 °C.
Keywords: Stockpiles; flotation; Temperature; Ore; Ores; Ore; oxidation; pyrrhotite; sulphide;
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