rotary drum dryer: 1). CE,CCC,CQC,ISO9001,Patent NO. 2). 12 month warranty 3). Engineer installation Rotary Drum Dryer Application:chemical industry: ammonium sulfate, sodium sulphide, ammophos, ammonium nitrate, carbamide, oxalic acid, potassium dichromate, PVC, nitrophosphate fertilizer, calcium magnesium phosphate, compound fertilizer,food industry: Glucose,salt, granulated sugar, vitamin ...