Piston pumps can transport solid-liquid mixtures and have significant advantages in handling slurries containing solid particles. They are commonly used equipment in industry for transporting high concentration, particle containing solid-liquid mixtures. The following will explain its adaptability characteristics, applicable scenarios, and precautions:

　　1、 The core reason why plunger pumps are suitable for transporting solid-liquid mixtures

　　Structural design adaptability

　　The hydraulic end flow channels of plunger pumps (such as suction valves, discharge valves, and cylinder body channels) are usually designed to be wide, and the clearance between the plunger and cylinder body can be adjusted according to material characteristics, making it less likely for solid particles to block the flow channels. Compared to centrifugal pumps and other equipment, it has a higher tolerance for particles.

　　The material has strong wear resistance

　　When transporting solid-liquid mixtures, key components such as plungers, valve seats, and cylinder bodies are made of wear-resistant materials, such as high chromium cast iron, ceramics (alumina, silicon carbide), wear-resistant alloys, etc., which can resist the erosion and wear of solid particles and extend their service life.

　　Pressure stability support

　　Solid liquid mixtures (such as slurry and sludge) often require high pressure to overcome pipeline resistance or meet the needs of subsequent equipment (such as filter presses), while plunger pumps can provide high pressure of 10-30MPa to ensure stable transportation of the mixture at high concentrations and high viscosities.

　　2、 Common application scenarios (solid-liquid mixture types)

　　Mining: Transportation of metal/non-metal ore slurry (containing ore particles, with a concentration of over 60%) and tailings slurry.

　　Environmental protection: municipal sludge (including sediment and organic particles), sand washing wastewater (including sand particles), industrial waste slurry.

　　Architecture: concrete slurry, slurry mixture used in shield tunneling construction.

　　Chemical industry: reaction slurry containing catalyst particles, pigment slurry (containing solid pigment particles).

　　3、 Precautions for use

　　Particle parameter limitation

　　Although plunger pumps are suitable for transporting solid-liquid mixtures, they are not unlimited:

　　The particle size of solid particles should not be too large (usually recommended to be ≤ 5mm, specific reference should be made to the pump model parameters), as oversized particles may cause valve blockage or scratch the plunger.

　　When the solid content is too high (such as exceeding 70%), it is necessary to evaluate the suction performance of the pump and, if necessary, cooperate with pre-treatment (such as stirring to prevent sedimentation).

　　Targeted maintenance

　　Regularly inspect the wear of wear-resistant components (plungers, valve discs, seals) and replace them in a timely manner to avoid leakage or efficiency decline.

　　After shutdown, the pump chamber needs to be cleaned to prevent residual solid particles from solidifying and clumping, which may cause component damage during the next start-up.

　　Material matching

　　If the solid-liquid mixture contains corrosive components (such as acidic slurry, sludge containing chemical agents), corrosion-resistant materials (such as stainless steel, lined cylinder body) should be selected to avoid component corrosion and failure.

　　summary

　　Piston pump is an ideal choice for conveying solid-liquid mixtures, especially suitable for high concentration, particle containing, and high-pressure conveying scenarios. In practical applications, it is necessary to select the appropriate model and material of plunger pump based on the characteristics of solid particle size, concentration, corrosiveness, etc., and carry out targeted maintenance to ensure stable operation.