What is vacuum pump filters application area ?

Cement：

Crushing, grinding, coal   grinding, material transportation, roof dust removal, raw meal grinding,   cement grinding, packaging

Metallurgy：

Electric arc furnace, blast   furnace, desulfurization furnace, induction furnace, casting, sandblasting,   simple furnace

Power plant：

Material transportation,   smoke/dust treatment, fly ash storage

Aluminum plant：

Fluidized bed dry-cleaning   tower, Wen-style jet dry-cleaning tower, self-baking dry-cleaning tower,   carbon dust, anode crushing,
  electrolytic aluminum production and dust removal

Food/medicine：

Additives, drying section,   flour/grain processing