Most industrial dust will blasts when it meets the static discharge if its content comes to a certain extent. This brings on the explosion and fire. For example, the dust in flour, chemical and coal industies are of this kind. So in the dedusting application of this case, the dust should be collected with special dust bags which are anti-static. Tianyuan absorbed the advanced technologies and developed the anti-static needle felts and cloths. They can meet the special demands of the dust collection of blast furnace gas and coal gas in the cement industry.