It is suitable for drying raw materials that have large size and heavy specific gravity. For example: ore, slag of blast furnace, coal, metallic powder, phosphorous fertilizer, ammonium sulphate and so on.
Dry powder, granule raw materials which have special requirements to drying. For example: HP vesicant, lees, light calcium carbonate, active white earth, magnetic powder, graphite, medical slag and so on.
Dry raw materials the need to dry at low temperature continuously and its batch is large.