Mortar pump is a slurry pump, for coal-fired boilers in addition to the application of slag slurry pump. More in this industry called mortar pump. This pump is widely used, with wear-resistant, anti-corrosion characteristics. The impeller is installed in the mortar pump casing, and fastened on the pump shaft, the pump shaft directly driven by the motor. The pump housing has a liquid suction inlet and suction pipe connection. Liquid enters the pump through the bottom valve and suction tube. The liquid discharge port on the pump housing is connected to the discharge pipe. Before the mortar pump starts, the pump housing is filled with the liquid being transported; after starting, the impeller is driven by the shaft to rotate at a high speed, and the liquid between the blades must also rotate along with it. Under the action of centrifugal force, liquid is thrown from the center of the impeller to the outer edge and gains energy, leaving the outer edge of the impeller to enter the scroll casing at a high speed. In the volute, the liquid due to the gradual expansion of the slowing down, but also part of the kinetic energy into static pressure, and finally to a higher pressure into the discharge pipe, to the required place. When the liquid flows from the impeller center to the outer edge, a certain vacuum is formed in the center of the impeller. Since the pressure above the liquid level in the sump is greater than the pressure at the inlet of the pump, the liquid is continuously pressed into the impeller. Visible, as long as the impeller constantly rotating, the liquid will be continuously inhaled and discharged.