Rotation of the impeller from the loading port into the raw coal, and coal pushed forward, raw coal gradually compressed, particles close together, at the same time produce larger stirring and mixing. The raw coal particle, particle between the vane and simplified and the intense friction and shear, at the same time under the action of heat, the temperature of the raw coal, water and binder is more even, coal has been greatly increased, plasticity after mold cone restraint effect, compression between coal particles more closely, and then pressed into the straight part of the mould, the coal rods machine and molding.

The coal rod machine adopts the hard gear reducer, small size and high carrying capacity. The impeller inside the coal rod extruder is designed with thickened blade, and the inner liner of impeller and barrel is made of wear-resisting and precision casting material, and the life time is 4-5 times higher than that of ordinary materials. The coal rod outlet of the machine head is made of replaceable wear-resistant alloy steel, which is convenient to replace. The machine head and the tube are in the form of a hinge, which can be opened when overhauling. It is very convenient to replace the inner impeller and liner.