Chalcopyrite is the most common copper minerals, native, there are secondary, can float better. And weak alkaline slurry, a long time to maintain its natural floatability. However, in strongly alkaline (pH value greater than 10), pulp, the surface structure by erosion, forming hydrophilic iron hydroxide film, Flotability worse.
Copper benefication method
In the deposits consist of chalcopyrite, long-term oxidation, the hardness of smaller, easily crushed, Flotability poor. The selected copper equipment flotation of copper sulphide. Generally is the first floating copper, then float sulfur. Dense massive copper pyrite, often with high alkalinity (free Ca0 content 600-800g/rr13) and high xanthate amount of float copper pyrite.
Its tailings, pyrite, gangue rarely, so the tailings of sulfur concentrate. Disseminated copper and sulfur ore flotation process float copper tailings again floating sulfur, in order to reduce consumption and to ensure the safe operation of the floating sulfur, floating copper, as far as possible the conditions of low alkalinity.
The flotation of copper ore
Generally use a relatively simple process, after a period of grinding fineness of -200 mesh about 50% to 70%, a rougher, 2 or 3 times selected, 1 or 2 times sweep the election. Such as copper minerals disseminated particle size is relatively small, we can consider the stage of grinding and separation processes. Bornite ore dressing plant, most of the crude concentrate regrinding – a selection of stage grinding and separation processes, and its essence is mixed – flotation process.
First by a period of rough grinding, roughing, scavenging, and then crude concentrate regrinding and then selected high-grade copper concentrate and concentrate. Coarse pulverized -200 mesh and about 45% to 50%, then pulverized -200 mesh about 90% to 95%.
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