an auger lock for conveying particulate material there through , said auger lock includes an auger tube receiving particulate material therein including an auger section , a material plug section , and an exit section . in the auger section ; a drive for rotating a rotatable spiral auger mounted concentrically on a rotatable drive shaft within said auger tube for conveying particulate material there through . in the material plug section ; conveyed particulate material is allowed to accumulate and compact to form a material plug to minimize free flow of gases through said auger tube . in said exit section ; a means for discharging said particulate material from said auger tube . further including a spring for biasing said exit door into a closed position , wherein said exit door moveable between a exit door open position and a exit door closed position , wherein said closed position said exit door seals off an exit end of said auger tube preventing flow of material and gas through said exit end , and in said open position allowing flow of material through said exit end .