The use of cyanide in mineral separation, pay attention to the following specific problems:

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The use of cyanide in mineral separation, pay attention to the following specific problems:
   
(1) for different sulfide ore cyanide inhibition of different, can be divided into three categories: the first category, lead, bismuth, tin, antimony, arsenic sulfide mineral basic did not inhibit the ability; second, mercury, cadmium, silver, copper sulfide mineral binding inhibition, but not too strong the use of cyanide inhibition, these minerals, cyanide dosage should be large; third, zinc, nickel, gold, iron sulfide inhibition ability, with fewer cyanide can inhibit.Thus, when the first and third types of sorting, with fewer cyanide can be separated, the best effect.Such as lead, zinc separation with cyanide inhibition of sphalerite.The first and second types of separation, can also be used for cyanide, but amount to.For example, copper lead mixed concentrate separation with cyanide inhibition of copper minerals.Second categories and third kinds of sorting, if the use of cyanide, the need for strict control of cyanide content, if the amount is too large, both inhibited.For example, copper zinc separation, using cyanide inhibition of copper minerals.
   (2) the production practice shows that, for certain minerals cyanide inhibition and the mineral composition, crystal structure, genetic and other factors.For example, high temperature, mesothermal deposit pyrite, sulfur and iron and the ratio of close to 2, easily cyanide inhibition.Low temperature hydrothermal deposit pyrite, sulfur and iron and the deviation of 2, can not easily be cyanide inhibition, sometimes even appear abnormal phenomenon, namely the activation effect.   
 (3) potassium ferricyanide (potassium ferricyanide and ferrocyanide) (+) is a secondary copper sulfide minerals inhibitor.In bulk concentrate of copper and molybdenum separation can be used for the suppression of copper molybdenum flotation.In the copper zinc separation, when secondary copper minerals sphalerite was produced by copper ion activation for potassium (sodium), inhibitory effect is not HERSHEY'S, the potassium ferrocyanide in pH=6 ~ 8 pulp or floating zinc copper.The inhibitory effect of iron cyanide (or ferrous cyanide) in secondary copper surface generation iron cyanide copper (or copper ferrocyanide) complex colloids, causes the copper surface hydrophilic and inhibited mineral. 

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