Flash Dryer for Bentonite: Fast Drying of Swelling Clay
How a spin flash dryer dries wet bentonite clay quickly while preserving its swelling and absorption properties, for drilling, foundry and pelletizing use.
Bentonite is a swelling clay used in drilling fluids, foundry sand binding, iron-ore pelletizing, cat litter and civil sealing. It comes off the mine or filter as a wet, sticky, high-moisture clay that has to be dried to a controlled moisture without losing its swelling and absorption properties. A spin flash dryer handles the sticky clay directly and dries it in seconds.
The drying challenge
- Wet, sticky, swelling clay that cakes easily and is too thick to pump.
- Controlled final moisture — over-drying or overheating can reduce the clay's swelling and absorption capacity.
- Consistent fineness for downstream binding and pelletizing.
Why a spin flash dryer fits
- Handles the sticky clay directly. The bottom agitator shears and disperses the wet clay into the hot-air stream, preventing caking.
- Fast, gentle drying. Seconds of residence remove moisture without the prolonged heat that would damage the clay's activity.
- Controlled fineness. The top classifier sets a consistent particle-size distribution.
- High throughput, low energy for large-scale clay processing.
Sizing guide
Size against your water-evaporation rate:
| Throughput tier | Suggested model | Chamber Ø | Water evaporation |
|---|---|---|---|
| Small line | XSG-4 to XSG-6 | 400–600 mm | 58–163 kg/h |
| Mid-scale | XSG-8 to XSG-10 | 800–1,000 mm | 238–430 kg/h |
| Large production | XSG-12 to XSG-16 | 1,200–1,600 mm | 515–1,203 kg/h |
Full figures are on the Spin Flash Dryer page; for the method see the flash dryer selection guide.
Talk to us about your bentonite drying
Tell us your feed moisture, target fineness and throughput, and we'll recommend the right spin flash dryer. Browse the flash dryer range to start.