Coal furnace can produce hot air from 60deg.C to 1000deg.C, ... matched with rotary dryer to dry compound fertilizer, sand. Coal furnace can produce hot air from 60deg.C to 1000deg.C ... to dry compound fertilizer, sand and so on.Hangzhou Meibao Furnace Engineering Co., Ltd. Tel:86-571-86717013 Fax:86-571 ... ://www.cnmbl.com Email:mbl at cnmbl.com sell coal furnace for rotary dryer