A slurry pump is designed to handle abrasive and sometimes corrosive slurry, but even a heavy-duty pump can suffer premature damage when it is operated incorrectly.

In mining and mineral processing plants, many pump failures are not caused by the pump itself. Incorrect operation, unsuitable working conditions, or poor maintenance can significantly shorten the service life of wet-end parts such as the impeller, liner, throatbush, and other components.

Here are several common operating mistakes that can accelerate slurry pump wear.

1. Running the Pump Without Enough Slurry

A slurry pump is designed to transport a mixture of liquid and solid particles. Operating conditions that cause insufficient slurry flow can create problems such as abnormal wear, vibration, or overheating.

If the pump frequently operates outside its intended operating range, the hydraulic conditions inside the pump may become unstable.

Tip: Make sure the actual flow and slurry concentration are within the pump's recommended operating range.

2. Running the Pump Dry

This is one of the most serious operating mistakes.

A slurry pump should not be operated without the required liquid. Dry running can cause rapid temperature increases and damage components such as seals, bearings, and other parts depending on the pump design.

Before starting the pump, operators should confirm that the suction line, pump casing, and relevant sealing system are properly prepared.

3. Starting the Pump Against an Improper Valve Position

Valve operation should follow the pump system's operating procedure.

An incorrect valve position during startup can cause unstable flow conditions or excessive load on the pump and piping system.

For centrifugal slurry pumps, the discharge valve is often controlled during startup to bring the pump gradually into the required operating condition. However, the exact procedure depends on the pump and system design.

Always follow the manufacturer's operating instructions rather than using one startup procedure for every pump.

4. Operating Far Away From the Designed Duty Point

Every slurry pump has a suitable operating range.

If the actual flow is consistently much higher or lower than the intended duty point, hydraulic efficiency and component loading may be affected.

Long-term operation away from the recommended range can contribute to:

• Increased vibration
• Higher power consumption
• Uneven wear
• Reduced hydraulic efficiency
• Shorter component life

Correct pump selection is therefore just as important as correct operation.

5. Ignoring Abnormal Vibration or Noise

Small changes in pump sound or vibration can be an early warning.

Operators may sometimes continue running the pump because it is "still working." However, abnormal vibration or noise can indicate problems with bearings, alignment, impeller condition, cavitation, blockage, or other components.

Early inspection can prevent a small problem from becoming a major failure.

6. Allowing the Suction Side to Become Restricted

A slurry pump needs a suitable suction condition to operate properly.

Blocked suction pipes, excessive bends, insufficient slurry supply, or unsuitable suction conditions can affect pump performance and may contribute to cavitation or unstable operation.

The suction line should therefore be checked regularly, especially when the pump's flow suddenly decreases.

7. Using the Wrong Slurry Pump for the Application

Sometimes the problem is not operation—it starts with pump selection.

Different slurries have different characteristics, including particle size, hardness, concentration, temperature, and corrosiveness.

For example, a pump suitable for relatively fine mineral slurry may not be the right choice for a highly abrasive slurry containing large and hard particles.

A proper selection should consider:

• Flow rate
• Head
• Slurry concentration
• Particle size
• Particle hardness
• Slurry density
• Temperature
• Corrosiveness
• Required operating hours

8. Continuing to Operate After Severe Wear Has Appeared

Wet-end components are wear parts. Their service life depends heavily on the actual slurry conditions and operating environment.

When an impeller, liner, or other wet-end component becomes severely worn, continuing to operate the pump may reduce performance and potentially affect other components.

Regular inspection and timely replacement can help maintain stable pump performance.

How Can You Extend Slurry Pump Service Life?

Good slurry pump operation is not simply about starting and stopping the machine correctly.

A longer service life usually requires a combination of:

Correct pump selection + correct installation + proper operation + regular inspection + timely maintenance.

Before putting a slurry pump into operation, operators should understand the pump's operating range, sealing arrangement, lubrication requirements, valve operation, and the characteristics of the slurry being handled.

A slurry pump is built to work in demanding conditions—but even the strongest pump needs the right operating conditions.

If your slurry pump is experiencing abnormal wear, vibration, low flow, or unexpectedly short component life, the operating conditions should be checked together with the pump selection and maintenance history.