Abstract：It is necessary to remove sulfur from coal concerning that the high sulfur content of coking coal can be rational utilization and reduce the effect of sulfur pollution to the environment, so coking coal is selected from Xinyu as the research and it is chosen typical sulfur compounds:sulfur (Pyrite) 、inorganic sulfur and organic sulfur (two benzothiophene) as well as Xinyu coking coal to dielectric properties test.Microwaves desulfurization experiment is done with band of 2 450 MHz.Finally the follow conclusions were reached:after processing of the change of the dielectric properties of coal samples related to the removal of sulfur in coal; its model of sulfur and typical sulfur compounds is the size of the dielectric constant:inorganic sulfur > sulfur (Pyrite) > organic sulfur (two benzothiophene) ; in microwave frequency range of 0.1 ~ 6.5 GHz, blending1% ~ 5% of sulfur (Pyrite) 、inorganic sulfur and organic sulfur (two benzothiophene) , elemental sulfur is added in the Xinyu coking coal and pyrite of dielectric constant change is not obvious, for organic sulfur (two benzothiophene) , with the increase of content of the Xinyu coking coal for the relative dielectric constant value increase.

Keyword：dielectric constant;high sulfur coking coal;dielectric properties;sulfur compounds;