... Detailed Product Description HZG Direct Heating Rotating Cylinder Drier drying machine Principle of work: After the damp raw material is ... Application: It is suitable for drying raw materials that have large size and heavy specific gravity.Forexample,ore,slag of ... powder,granule raw materials which habe special requirements to drying .For example:Hpvesicang,less,lighe calcium carbonate,active white ...