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Method for separating copper and sulfur in copper-sulfur ore
Copper sulfur key stone ore flotation separation problems Cu-S, is the main principle of the separation method of the floating copper sulphide minerals pyrite suppression (suppression floating Cu S), inhibition of sulfur are:
(1) Lime method is the most commonly used and most economical method. The main disadvantage of this method is that when the sulfur content is high, the amount of lime is too large to make the foam sticky or even run. The quality of copper concentrate is not high, and the equipment and pipeline are easy. Calcium." Some plants use lime plus a small amount of cyanide to reduce the amount of lime.
(2) Lime plus sodium sulfite (or SO 2 ) method, which is effective for ores with high sulfur content or low sulfur content but high mud content, or high pyrite activity is not inhibited. The key to this method is based on The ore property controls the suitable pH value of the pulp and the amount of sodium sulfite and appropriately strengthens the aeration. Some tests indicate that this method is effective in the weak acid medium with pH=5~7. The advantage of this method is to overcome the shortcomings caused by excessive lime. At the same time, the inhibited pyrite is easily activated.
(3) Heating method, which accelerates the oxidation of pyrite surface by heating, and the research on the heating flotation of copper-sulfur mixed concentrate proves that using lime to make PH=11 and then use steam to warm the pulp. Up to 60~70 °C, the best results.