Slurry pump

Slurry pumpIt is a centrifugal or volumetric special pump designed specifically for transporting suspensions containing solid particles. The medium it processes is called "slurry" and usually has the following characteristics:

High abrasiveness: Hard particles such as ore and coal slag can account for 60% -70%, with a flow rate of up to 3-5 meters per second, and wear strength comparable to sandpaper polishing.

■ Strong corrosiveness: The sulfuric acid slurry used in metallurgical acid washing and phosphate fertilizer production can have a pH value as low as 1.5, causing strong corrosion to metals.

Complex flow state: Solid liquid mixtures are prone to settling and clumping, which may cause pipeline blockage or pump overload.

It is precisely these working conditions that make ordinary water pumps often unable to survive for three months in such scenarios, while dedicated onesSlurry pumpBut it can run stably for thousands of hours.

Structural Design

1. The overcurrent component is armed to the teeth

The key parts of the pump casing, impeller, and guard plate that come into contact with the slurry are made of high chromium cast iron (Cr content 27% -30%) or rubber lining. The hardness of high chromium cast iron can reach HRC62, and its wear resistance is 10 times higher than that of ordinary steel; Rubber lining utilizes elastic cushioning particles to impact, especially suitable for conveying fine particle slurries with a particle size less than 5 millimeters.

2. The sealing system is leak proof

The mechanical seal of traditional water pumps is easily trapped by particles in the slurry, thereforeSlurry pumpDouble protection of secondary impeller power seal and packing seal is commonly used. The negative pressure generated by the rotation of the secondary impeller blocks the invasion of slurry, while the packing box is filled with clean water or lubricating grease to form an isolation layer, ensuring that the leakage rate is less than 5 milliliters per minute.

3. Fluid intelligence in channel design

The open wide channel impeller reduces the risk of blockage, and the blade inlet angle is optimized to 25 ° -35 °, which can improve efficiency and reduce turbulent wear. Some large pumps are also equipped with adjustable wear-resistant lining plates, which can adjust the clearance through bolts after local wear, extending the overall service life.