High Chromium Alloy CR27 Slurry Pump

 high-chromium-alloy-cr27-slurry-pump is usually of horizontal, single-stage, single-suction, cantilever structure, and adopts a double pump shell design. The outer layer is a sturdy metal pressure-bearing shell, and the inner flow components (including the impeller, front/back guard plates, sleeve or volute) are all made of Cr27 high-chromium alloy cast iron through precise casting and heat treatment processes. . This design ensures that the pump body can withstand high pressure while the core contact wear-resistant components possess supreme wear resistance. The shaft seal can be selected as packing seal, auxiliary impeller seal or mechanical seal according to the working conditions.

Extremely durable, with an extremely long service life: The Cr27 material, after heat treatment, can reach a hardness of HRC58-62, effectively resisting cutting and chiseling wear caused by high-hardness particles such as quartz sand and iron ore powder. . Under the same operating conditions, the service life of its flow components can be up to 3 to 5 times longer than that of ordinary cast iron materials, significantly reducing the frequency of replacements and the overall operating costs. .
High strength and impact resistance: The high-chromium alloy has excellent impact resistance, capable of withstanding instantaneous impacts from large solid particles without breaking. It is suitable for transporting slurries containing certain particle sizes of solids. .
Excellent corrosion resistance: It has certain corrosion resistance to common acidic and alkaline media, and is particularly suitable for handling abrasive slurries with neutral pH or weak corrosive properties. .
Resistant to high pressure and high temperature: The metal structure has high strength and good dimensional stability, suitable for high-head and high-pressure working conditions, and can withstand higher pulp temperatures than rubber-lined pumps.

Rubber Lining

* Excellent corrosion resistance, ideal for acidic/alkaline slurries (e.g., flue gas desulfurization).
* Lightweight, easy to install and replace.
* Smooth surface ensures high hydraulic efficiency.
* High elasticity reduces water hammer risks and operational noise.
*Cost-effective for fine-grained, low-abrasion media (e.g., iron ore fines).

High-Chrome Alloy Lining

* Exceptional wear resistance (HRC58–70), suitable for coarse, abrasive particles (e.g., coal, iron ore).
* Long service life in high-concentration, high-impact environments.
* Special grades (e.g., A49, A33) offer balanced wear and corrosion resistance.
* Robust for mining/metallurgy applications with large, sharp solids.

The selection of lining material is critical to the performance and service life of a slurry pump. The two primary options are:
Rubber Lining: Preferred for handling fine particles, low-head applications requiring high corrosion resistance. Its elastic surface effectively cushions the impact of fine solids and provides good chemical resistance. Common applications include limestone/gypsum slurry transport in Flue Gas Desulfurization (FGD) systems and iron concentrate slurry transport.
High-Chromium Alloy Lining: Ideal for harsh conditions involving coarse particles, severe abrasion, and high solids concentration. Its extreme hardness provides superior resistance to cutting wear. Typical applications are found in mining (tailings/concentrate slurry) and coal processing (coal slurry/coal-water mixture transport).
Key Selection Principle: Maximizing pump performance, extending service life, and optimizing cost-effectiveness hinge on selecting the appropriate lining material based on a thorough analysis of the medium characteristics (particle size, hardness, corrosiveness) and the specific operating conditions (concentration, head).

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