Operating method of slurry pump and slurry pump

摘要

To provide a slurry pump can be prevented that while not operating the slurry pump, the rotation of the impeller from being constrained slurry of the impeller casing is solidified. A slurry pump for pumping the slurry which is stored, an impeller casing having a slurry discharge opening slurry suction port and a lower tube suspension is immersed in the slurry, is connected to the lower end of the lower tube suspended, wherein the impeller casing and a main shaft that the lower end is connected to the impeller through the down pipe suspended above an impeller disposed therein, the upper end as well as connected to the rotary shaft of the motor and connected to the slurry discharge port slurry interior is to be discharged air is supplied to the impeller casing through the said discharge decane air pipe is connected to the discharge pipe.