Flotation of Highly Alkali-Depressed Pyrite Activated by Using Acid Mine Drainage Combined with Pulp Regulator
Acid mine drainage(AMD)and a pulp regulator,TY-308,were used combinedly for activation in flotation of highly alkali-depressed pyrite,in which AMD was used to neutralize the pulp alkalinity,and TY-308 used to reduce the negative effect of AMD on flotation.A closed-circuit test on flotation with the process consisting of one-stage roughing,one-stage cleaning and one-stage scavenging yielded a pyrite concentrate grading 48.73%S at 97.93%recovery.Compared with the practice using sulfuric acid as the activator,the sulfur recovery can be increased by 1.34 percentage points.Furthermore,not only the cost for AMD treatment will be significantly reduced,but the safety risk associated with the use of concentrated sulfuric acid can be avoided.
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