Gravity Separation Equipment
Spiral Chute
The Xinhai spiral chute uses a helical trough and fluid film to separate fine minerals by density. Feed slurry enters the top and flows down under gravity. Heavy particles collect near the centre; light gangue moves to the outer edge. No moving parts are required.
Technical parameters
It is typically installed after grinding and classification, ahead of final cleaning. Unlike jigs or shaking tables, it runs continuously with low water and power demand.
The table shows diameter, pitch, and head count for each model. Larger diameters handle higher throughput and coarser feed. More heads increase capacity within the same footprint. The pitch affects slope and residence time, which fine-tunes the cut point. Ensure your feed size and concentration fall within the listed limits.
| Model | Diameter (mm) | Pitch (mm) | Number of Spiral Heads (item) | Feed Particle Size (mm) | Feed Concentration (%) | Processing Capacity (t/h) | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| BLL-400 | 400 | 240/180 | 2 | 0.02-0.2 | 25-55 | 0.15-0.2 | 460×460×1500 | 50 |
| BLL-600 | 600 | 450/360/270 | 2 | 0.02-0.2 | 25-55 | 0.4-0.8 | 700×700×2600 | 150 |
| BLL-900 | 900 | 675/540/405 | 4 | 0.03-0.3 | 25-55 | 2-3 | 1060×1060×4000 | 400 |
| BLL-1200 | 1200 | 900/720/540 | 4 | 0.03-0.3 | 25-35 | 4-6 | 1360×1360×5230 | 600 |
| BLL-1500 | 1500 | 720/540 | 4 | 0.037-0.8 | 30-60 | 6-8 | 1560×1560×5230 | 800 |
| BLL-2000 | 2000 | 1200 | 3 | 0.04-4 | 20-45 | 15-40 | 2300×2300×6500 | 1100 |
Standard-model catalogue figures. Actual capacity, power draw and wear life shift with ore properties, feed gradation and circuit conditions. Use them to shortlist, then confirm the duty by testwork, flowsheet calculation and a written confirmation from the manufacturer.
What decides the selection
Before selecting a spiral chute, establish your feed particle size distribution and the density difference between valuable mineral and gangue. Determine the mass flow and slurry concentration from upstream grinding and classification. Decide whether the unit will serve as a rougher, cleaner, or scavenger. Measure the available vertical space against the spiral height. These inputs fix the model diameter, pitch, and head count.
- Density difference between minerals
- Liberation size
- Size range treated
- Feed density
- Throughput per unit area
- Stroke and stroke frequency
- Water consumption
- Recovery target
Other gravity machines
- Sawtooth Wave Jig8 models
- 6-S Shaking Table13 models
- Agitating Chute10 models
- Water-Jacket Centrifugal Concentrator5 models
- Centrifugal Concentrator17 models
- Suspended Vibration Blanket Machine5 models
ISO 9001 / ISO 14001 / ISO 45001 / ISO 9712 / CE / CSA W47.1 / CNAS accredited laboratory
Send the duty, get a sized proposal
Tell us the ore, the throughput and the target product. Our process engineers come back with a flowsheet position, a model shortlist and the testwork we would need to confirm it.