In mining operations, slurry pumps are typically used to transfer slurry. Slurry is one of the most challenging fluids. It is highly abrasive, viscous, sometimes corrosive, and contains high concentrations of solids. There is no doubt that pumping slurries is challenging.

submersible slurry pump

However, selecting the appropriate pump for these material applications can have a substantial long-term positive impact. But how exactly do they work? Let's find out!

What is a slurry pumps?

Slurry pumps are designed to pump media containing abrasive particles, enabling the transfer of solid materials and solid-liquid mixtures. The final product is pumped during the process. Therefore, they are commonly used in dredging, mining, and mineral processing applications. Additionally, wastewater treatment operations commonly use them.

Slurry pumps are typically larger in size and, due to their lower efficiency, generally require more horsepower to operate compared to pumps designed for low-viscosity liquids. Bearings and shafts must also be stronger and more durable.

Slurry pumps typically line the pump casing with either metal or rubber to prevent wear and tear.

A factory makes metal casings out of carbide. These housings can withstand erosion caused by increased pressure and cycling.

The engineer selects the casing to suit the specific application. For example, pumps used in cement production handle fine particles at low pressure. Therefore, a lightweight housing construction is acceptable. If the pump handles rock, the pump housing and impeller require a thicker and more robust housing.

How  to choose a slurry pump?

• When pumping abrasive slurries, it is essential to use wear parts that have a high chromium content. However, more is not always better. Chromium content above 25% can cause impellers to become brittle.
• Hydraulic efficiency is as important as material, as efficiency is related to wear. The swept back design of the impeller blades minimizes the separation of solids from the carrying fluid, resulting in a more uniform flow. This results in slower wear.
• By increasing the size of the worm shell, the velocity of the media movement can be reduced. Lower velocities mean less wear.

Pumping slurry can present some challenges and problems, but with proper engineering and equipment selection, you can achieve trouble-free operation for an extended period of time. It is important to work with a qualified pump engineer when selecting a slurry pump, as slurry can cause significant damage to a pump if not chosen correctly. Please feel free to contact AIPU!