CENTRIFUGAL PUMP FOR HANDLING LIQUIDS CARRYING SOLID ABRASIVE PARTICLES

摘要

A centrifugal pump is proposed for handling liquids carrying solid abrasive particles a casing of which has a flow-through portion formed by a discharge passage and a flow-through passage of an impeller accommodated inside the casing. The discharge passage is confined by two side walls of the casing, front and rear relative to the incoming flow of the liquid being transferred, and by a peripheral wall of the casing integral with the front and rear walls. The geometry of the peripheral wall of the casing follows the law of distribution of solid abrasive particles in the flow-through portion of the pump. The flow-through passage is formed by a carrying disk mounted on a drive shaft and having vanes secured thereto, and by a driven disk secured on the vanes. The proposed centrifugal pump, when used for transferring a liquid carrying the beneficiation products of kimberlit ore having a mixture density of 1200 kb/m3, volume concentration of solids So=0.125, and size of solid particles 50 mm, has a service life of the casing of 750 hours. A centrifugal pump embodying the features of the present invention and used in a beneficiation mill producing copper concentrate pumped an ore material of the first stage of comminution having a mixture density of 1500 kg/m3, volume concentration of solids So-0.2 and the size of solid particles to 1.0 mm, exhibited a casing service life of 926 hours.