... quickly achieve the purpose of cooling or drying. Double-shaft Hollow Blade Cooling and Drying MachineBriefThis machine is used for cooling powder ... materials are put into the machine,onstantly rotating blade,the materials among the hollow blade,hollow shaft,surface of shell,simultaneously,cooled or heated ... °C300kg/time20%15min/timeLess than 0.3% Double-shaft Hollow Blade Cooling Machine