Requirements for Slurry Concentration by Slurry Pump
 

The slurry pump has clear requirements for slurry concentration. Generally, the maximum weight concentration of mortar (such as ash slurry, coal slurry) does not exceed 45%, and the slurry (such as slurry, heavy medium) does not exceed 60%. This standard applies to most types of slurry pumps, and the specific concentration needs to be adjusted according to the characteristics of the slurry, pump design, and application scenarios. ‌

1. Concentration requirement standards

The slurry concentration processed by the slurry pump is measured by the maximum weight concentration (Cw) of the solid-liquid mixture, and is mainly divided into two categories:

Mortar type (such as ash slurry, coal slurry): The maximum concentration is usually 45%, suitable for conveying slurry containing abrasive particles in industries such as power and coal. ‌‌
Slurry type (such as slurry, heavy medium): with a maximum concentration of up to 60%, commonly used in mining, metallurgy and other scenarios, for processing high hardness solid particles. ‌‌

2. Influencing factors

The concentration requirements of the slurry are influenced by the following factors and need to be comprehensively considered when selecting:
Particle characteristics: The particle size and uniformity determine the pump's tolerance. Small particles (such as uniform slurry) can support higher concentrations, while large particles or non-uniform slurry can lower the upper limit of effective concentration. ‌‌
Pump design:
Vertical slurry pumps (such as ZJL type) and submersible slurry pumps typically support a concentration range of 45% -60% without the need for shaft seal water, making them suitable for high concentration conditions. ‌‌
The concentration requirements for horizontal slurry pumps are similar, but regular maintenance of impeller clearance (0.75-1.0mm) is required to ensure performance. ‌‌
Material and working conditions: High chromium alloy material can enhance wear resistance and adapt to high concentration abrasive slurries; Temperature (generally ≤ 60 ℃), pH value (4-10), and medium density (≤ 1300kg/m ³) can also indirectly affect the concentration treatment capacity. ‌‌

3. Application and selection suggestions

Industry application: Concentration requirements directly affect pump selection. For example, in the mining and metallurgical industries, 60% of the slurry needs to be processed, and high concentration tolerant pump types are selected. ‌‌
The concentration of mortar in the power industry is ≤ 45%, and attention should be paid to sealing and wear-resistant design. ‌‌
Selection key: Select the pump type based on the slurry type (mortar or slurry) and concentration limit, giving priority to high chromium alloy materials and intelligent monitoring systems (such as temperature control and water leakage protection) to extend the service life. ‌‌

Choosing a professional slurry pump manufacturer will save you a lot of trouble.