Xingtai City Bin Huan machinery factory developed the production of baking machines, coffee roaster, roaster smart factory outlets, gifted cheap, please call to discuss. Today's drum roaster is almost half full of hot air direct fire type, one side to the fire source directly grilled hot rollers, hot air to the side of the drum. The hot air blown into the inside of the drum can improve the heating rate, but also blown debris, thereby producing a balanced and clean beans.