Experimental study on acidification effect of tailing sand

Sulfide minerals (mainly FeS2) contained in lead-zinc tailings are easy to be acidified the air. The acidification mechanism is that tailing sand generates sulfuric acid and sulfate under catalysis of oxidant, water oxygen. acidic liquid generated by reaction will continue react with metal oxides form an insoluble precipitate.In order reveal corresponding changes chemical properties physical during acidification, a series processes natural conditions were simulated immersion test laboratory.It found through deepening coarse particles dissolve, resulting decrease iron concentration compound, increase fine particles, specific surface area, friction occlusion between internal angle, safety dam. words.