Solar Pump Selection for Gold Mine Ore Washing, Scrubber and Gravity Processing Water
Introduction
Before gold can be recovered it has to be washed. Scrubbers, trommels, vibrating screens, sluices and gravity tables all demand a steady supply of clean, pressurised water—often in remote bush where a grid or diesel supply is unreliable. A solar pump sized for the washing circuit keeps the plant fed without a fuel convoy, and pairs naturally with the mine’s other off-grid water duties. This guide, from solar pumping specialists at KINBO, covers solar pump selection for gold-mine ore washing, scrubbing and gravity-processing water.
Table of Contents
Where Washing Water Is Used
Wash water touches almost every stage of a gold plant:
- Scrubber / trommel—breaks clay and washes liberated gold-bearing material; the highest, most continuous demand.
- Vibrating screen spray bars—need pressurised water to rinse oversize and prevent blinding.
- Sluice and gravity circuit—water carries and stratifies material on sluices, jigs and shaking tables.
- Cyclone / classifier feed—needs consistent pressure for sizing; see our process-water guide for the wider duty.
Selecting the Wash-Water Pump
Wash water is usually clean to mildly dirty, so a centrifugal pump is the default:
- End-suction or multistage centrifugal—delivers the flow and pressure spray bars need; multistage when the source is a deep bore (our deep-borehole guide).
- Solids handling—if the source is river or recycled, pick semi-open impellers and screen intakes to survive grit (our abrasive-water guide).
- Pressure—size for the highest spray-bar or cyclone pressure, not just volume; under-pressure wash means blinded screens and lost recovery.
- Controller—a VFD-style solar controller holds pressure as the array output swings through the day.
Solar Drive and Buffer
- Array—size to peak wash demand with ~20% headroom; washing runs in daylight so battery needs are modest.
- Buffer tank / header—an elevated tank buffer smooths pressure and covers brief cloud, so screens never starve mid-shift.
- Recycle—where the circuit recirculates, a solar transfer pump returns clarified water to the wash sump, cutting total draw (our effluent-reuse guide).
Solar vs Diesel Wash Supply
| Factor | Diesel Wash Supply | Solar Wash Supply |
|---|---|---|
| Fuel cost | Per run-hour, perpetual | Zero after install |
| Pressure stability | Good, fuel-dependent | Good with buffer + VFD |
| Logistics | Daily diesel delivery risk | One-time delivery only |
| Best fit | Grid-connected plants | Off-grid / remote wash circuits |
For the cost case, our solar-vs-diesel analysis shows remote sites typically pay back in 1–3 years.
Frequently Asked Questions
Can solar really hold wash pressure?
Yes. An array sized to peak demand plus a buffer tank and VFD control keeps spray-bar pressure steady through normal sun variation; the buffer covers brief cloud.
What if my wash water is muddy river water?
Use semi-open impellers, a screened intake and abrasion-resistant wet-ends; settle coarse solids first so the pump only sees fine, pumpable water.
Should I recycle wash water?
Where the circuit allows, yes—a solar transfer pump returns clarified water to the sump, cutting draw and the load on your source bore or river.
Does this integrate with the rest of the mine?
It shares the same solar array philosophy as dewatering, camp and process duties; our complete system design guide shows how to combine them.
Related Articles
- Solar Pump Selection for Gold Mine Process Water
- Solar Pump Selection for Abrasive and Sediment-Laden Water
- Solar Pump Selection for Deep Borehole Water Supply
- Explore KINBO Solar Pump Products
Get a Solar Wash-Water Package for Your Plant
Tell KINBO your scrubber, screen and sluice flow and pressure needs, plus your water source quality, and we will specify a solar wash-water pump with the right buffer and control to keep your gold plant fed off-grid. Contact our team for a tailored quote.
Published by KINBO · September 22, 2026 · Category: Pump Selection Guide
