The job of a slurry pump
Slurry pumps are the circulatory system of a mineral plant: they move abrasive, solids-laden slurry between every wet unit operation. The XPA centrifugal slurry pump is built for exactly this duty, with heavy wear-resistant wetted parts that survive the constant scouring of sand and ground ore that would destroy an ordinary water pump in days. It is used for mill discharge, cyclone and hydrocyclone feed, flotation transfer, thickener underflow and tailings.
How it works
Like any centrifugal pump, a rotating impeller throws slurry outward to build pressure and flow. What makes it a slurry pump is everything around the impeller: thick, replaceable liners; a robust impeller cast from hard alloy or molded in rubber; large clearances that pass coarse particles; and a heavy bearing assembly to carry the side loads of dense slurry. Liners and impeller are the wear parts and are designed for straightforward replacement.
Selection logic
Pump selection is set by duty point – required flow and total head – and by the slurry itself: solids concentration, particle size and abrasiveness. As a rule of thumb, slurry pumps run derated against clean-water curves, and are best operated below about 75-80% of maximum impeller speed to extend wear life. Metal (hard-alloy) wet ends suit coarse, high-head duty; rubber-lined ends suit fine, highly abrasive slurries. Xinhai sizes the pump and selects liner material to your duty and ore.
- Wear-resistant liners and impeller for abrasive slurry
- Metal or rubber wet ends to match the slurry
- High solids handling with large through-flow clearances
- Heavy bearing assembly for long, reliable service
Operating for wear life
The single biggest lever on running cost is impeller speed: every percent of extra speed multiplies wear, so pumps are sized to meet the duty at modest speed rather than running a small pump flat out. The XPA pump is the standard mover for thickener underflow and for feeding dewatering equipment. It supports circuits from a gold processing plant through to tailings disposal.
See the full slurry pumps range. For help selecting pump size, liner material and duty point for your slurry, contact our engineers.
Technical Specifications
| Flow rate | 10-3,000 mu00b3/h (configurable) |
|---|---|
| Head | 5-90 m per stage (configurable) |
| Motor power | 7.5-560 kW |
| Wet-end material | Hard alloy (metal) or rubber-lined |
| Max solids | High solids by weight, coarse particle passage |
| Wear parts | Replaceable liners & impeller |
| Drive | Belt or direct, optional VSD |
| Application | Mill, cyclone, flotation, thickener & tailings duty |
| Customization | OEM / ODM, sized to duty point & slurry |
Frequently Asked Questions
Should I choose a metal or rubber-lined slurry pump?
Hard-alloy (metal) wet ends suit coarse, high-head and higher-temperature duty, while rubber liners excel on fine, highly abrasive slurries at moderate head and resist corrosion. The choice depends on particle size, head and chemistry. Xinhai recommends the liner material based on your slurry data so wear life and cost are optimized for the duty.
How do I size a slurry pump?
Sizing starts from the duty point, the flow and total head the circuit requires, then accounts for the slurry's solids concentration, particle size and abrasiveness, which derate the pump against clean-water curves. We size the pump to meet the duty at modest impeller speed, since running below about 75-80% of max speed greatly extends wear-part life.
How long do the liners and impeller last?
Wear-part life depends on slurry abrasiveness, solids content and operating speed, and can range from a few months to over a year. The dominant factor is impeller speed, where small increases sharply raise wear. Liners and impellers are designed as quick-change parts, and Xinhai supplies spares matched to your pump.
Can it pump high-density thickener underflow?
Yes. The XPA pump is built for dense, solids-heavy duty such as thickener underflow and tailings, with large clearances and heavy wetted parts. Very dense paste-grade underflow may need a positive-displacement pump instead, but for most thickened slurries the centrifugal slurry pump is the standard, robust choice.