The Repair method of Slurry Pump Erosion Wear

Date: 2022-02-11     From: Longding     Author: admin

The slurry pump is a kind of impurity pump used for conveying solid-liquid mixture. Slurry pumps can be widely used in mining, electric power, metallurgy, coal, environmental protection, and other industries to transport slurries containing abrasive solid particles. Due to the transport medium, the slurry pump often suffers from erosion and wear. So how to repair the wear of the slurry pump has become an urgent problem for many production lines.

Causes of Slurry Pump Wear

1. During the operation of the slurry pump, the solid particles carried in the liquid impact the surface of the flow passage parts at a certain speed, resulting in material loss. According to the analysis of the wear surface of the failed components, the erosion wear mechanism can be divided into cutting wear, deformation fatigue wear, and cutting + deformation conforming wear.

2. During the operation of the pump, for some reason, when the pressure of the liquid pumped into the local area of the flow passage part drops to the vaporization pressure at the current temperature, the liquid begins to vaporize there, producing steam and forming bubbles. These bubbles flow forward with the liquid, and the metal surface is fatigued and peeled off due to this impact, resulting in material loss. In severe cases, the metal surface appears honeycomb.

3. When the conveyed medium has a certain acidity and alkalinity, the over-current parts of the slurry pump will also undergo corrosion and wear, that is, the loss of materials under the combined action of corrosion and wear.

Slurry pump erosion and wear repair steps

1. Surface treatment: Sandblast the area to be repaired.

2. Cleaning: Use anhydrous ethanol to clean the overcurrent parts and the places to be protected after sandblasting.

3. The polymer material is blended in strict proportions.

4. Apply to repair scour worn grooves and potholes.

5. After the material has been applied, the material is post-cured by applying heat.