... widely used in chemical, pharmacy, food, light industry and vegetables. For instance:gypsum, ferric sulfate, nickel sulphate, copper' sulphate, potassium ... high-speed by motor, materials enter the drum from top feed pipe ,then run forward to the shell of the drum ... the customers to contact us,we promise to give you best price and quality service.It is our hornor to offer service to you. For drying and ...