Roll extrusion granulator suits to dry materials with moisture content below 8%, used in compound fertilizer production line to produce NPK compound fertilizer and Urea. Dry powder (8% moisture content) is extruded and granulated by roll extrusion fertilizer granulation machine which adopts dry extrusion technology, making materials be standard fertilizer granules. After being extruded by two rollers, raw materials, space between which are squeezed to minimum value, become caky ones. The density of materials are multiplied several times.
