The common structure of slurry pumps is as follows

Slurry pumps transport a mixture of solid particles containing slag and water. However, in principle, slurry pumps belong to a type of centrifugal pump and are mainly used in steel enterprises for transporting slurry in systems such as converter dust removal water, blast furnace gas scrubbing water, continuous casting turbid ring water, and rolling turbid ring water.

(1) Pump head structure. The pump body adopts a double-layer pump casing (inner and outer double metal structure). The double pump casing outer shell structure is vertically split in the middle, and the outlet position can be installed at 8 different positions by rotating at 45° intervals. To effectively prevent shaft seal leakage, dynamic seals, packing seals or mechanical seals are used in combination. A labyrinth clearance seal is set between the impeller and the backplate, greatly reducing the amount of slurry leaking into the packing box and effectively ensuring the reliability of the seal. The impeller is equipped with back vanes , which promptly discharge the recirculated slurry, thereby improving the volumetric efficiency , reducing recirculation and erosion, and extending the service life of the flow-through components. For easy maintenance and disassembly, a dismantling ring is provided to avoid shaft cutting caused by inability to disassemble.

(2) Bracket structure. The bracket structure is horizontally split in the middle. To extend the service life of the bearing, optimizations have been made in hydraulic design and structural design. This allows reasonable distribution of radial and axial forces, correct selection of bearing types, models, cooling, and lubrication methods, thereby achieving low bearing heat generation and long service life.

(3) Shaft seal type. The shaft seal device seals between the pump body and the pump shaft. It prevents air from entering the pump and large amounts of water from leaking out of the pump. The sealing form of centrifugal slurry pumps usually adopts an auxiliary impeller plus packing seal. The auxiliary impeller plus packing seal is a hydrodynamic seal that resists liquid leakage at the impeller outlet by the pressure head generated by the auxiliary impeller. At the same time, the impeller cover plate is equipped with back vanes, a water seal ring, and packing to prevent air from entering. The back vanes and water seal ring reduce the pressure at the packing, preventing impurities from entering the seal.