Process for reducing the sulphur content of coal

Details Process for reducing the sulphur content of coal Process for reducing the sulphur content of coal

C - Chemistry, Metallurgy

10

L

196/11, 204/96.3

C10L 9/00 (2006.01) B03C 7/00 (2006.01)

Patent

CA 1144105

ABSTRACT OF THE DISCLOSURE After pulverizing to minus 200 mesh, a mixture of coal and pyrite particles is passed through an A.C. silent corona discharge in the presence of a reactant gas. Simultaneously; the particles are de-agglomerated and an electrical or magnetic difference between them is enhanced. Thereafter, the pyrite is separated from the coal. The effectiveness of the pulverizing step in separate pyrite particles from the coal matrix, especially small-size particles approximately 50 micrometers and less, is enhanced by pretreating the coal with a chemical comminutant. One example is a solution of ammonia, used to presoak the coal for a short time, at, for example, atmospheric pressure and ambient temperature.

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