What are spiral concentrators used for?
A spiral concentrator separates suitably liberated particles in a flowing slurry on a helical trough. It uses gravity and flow behavior to divide the stream into products with different mineral concentrations.
How it works
As slurry travels down the spiral, particles distribute across the trough according to size, density and flow conditions. Product splitters collect selected bands. Multiple stages may be used for roughing, cleaning and scavenging.
When to consider it
Consider spirals for a tested mineral-sands or other gravity duty with a prepared feed and useful density contrast. Provide size-by-size mineral data and define the stage duty before selecting the number of starts.
Application limits to check
Slimes, broad size distributions, unstable feed and poor liberation can reduce selectivity. A spiral has no grinding function and should not be selected from dry tonnage alone.
Selection data for a useful quotation
These are enquiry inputs, not specifications of a single model. Include measured values, units and the expected operating range; flag anything still to be tested.
| Input | What to provide |
|---|---|
| Mineral data | Densities, liberation and distribution by size fraction |
| Feed condition | Size range, slimes, solids concentration and flow |
| Stage duty | Rougher, cleaner or scavenger targets |
| Arrangement | Number of starts, feed distributor and product splitters |
| Water and recycle | Available water, recirculation and middlings flow |
| Installation | Height, access, support, launders and abrasion protection |
Compare the complete duty
Spirals use continuous slurry flow without a driven separating deck. Tables and jigs provide different control and feed envelopes. Compare the required staging and preparation, not only the separator's drive power.
Before accepting a supplier proposal
- Review representative spiral tests and the complete product mass balance.
- Confirm equal feed distribution and access to adjust splitters.
- Include launders, distributors, supports and spare wear components in the scope.
Buyer questions about spiral concentrators
Do spirals need no power at all?
The separating trough has no drive, but feed pumping, preparation and water systems may consume power. Evaluate the complete circuit.
Why use several spiral stages?
Roughing, cleaning and scavenging pursue different recovery and grade objectives. Staging is determined by testwork and product targets.
Can spirals process untreated slimes?
Fine or clay-rich feeds require specific evaluation. Desliming or a different process may be needed when the tested separation is poor.
Technical reference
Xinhai: official equipment and technology description ↗
The source provides technology context. The selection checklist is KMS Industrial editorial guidance; manufacturer models and performance figures are not KMS specifications.