Coal gangue is the solid wastes discharged from coal washing process, which is not only occupy the land, but also casuse pollution to environment. So it need to be disposed. Some careful investors found uneven thickness golden crystals embedded in coal gangue, so what are these golden crystals? Are they useful?

The golden crystals in the gangue is actually pyrite crystals, mainly composed of iron disulfide. It is a very important mineral resources used in chemicals, military, agriculture, etc. The extraction of pyrite from the coal gangue can not only solve the environmental problem, also have a very considerable economic benefits.

The specific gravity of pyrite is 4.9-5.2, while gangue proportion is not more than 3.0. There's a obvious difference in specific gravity and most of the pyrite are coarse disseminated in the coal gangue. Monomer dissociation can be achieved by crushing and coarse grinding. These features determine the gravity separation is the best method extract pyrite from coal gangue. And the most commonly used gravity separator is jig separator, with which can get ideal beneficiation effects and processing efficiency. The site below shows the pyrite jigging separation from coal gangue.



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