Decanter Centrifuge for Kaolin Slurry Dewatering
Description
The Peony Decanter Centrifuge for Kaolin Slurry Dewatering is designed for the continuous thickening, dewatering, and recovery of kaolin slurry generated during wet beneficiation, washing, classification, and impurity-removal processes.
It separates fine kaolin solids from process water by centrifugal force. The screw conveyor continuously transports the settled kaolin solids toward the discharge end, while clarified liquid flows out through the liquid outlet for recycle or further treatment.
This centrifuge is suitable for kaolin plants that need to reduce slurry volume before filter pressing, drying, storage, or transport. It can also help recover fine kaolin particles from overflow streams and reduce solids loss to wastewater.
Typical Kaolin Applications
- Kaolin slurry thickening after wet beneficiation
- Fine kaolin recovery from process water
- Kaolin washing slurry dewatering
- Ceramic-grade kaolin slurry concentration
- Paper coating kaolin recovery
- Kaolin residue and reject slurry dewatering
- Kaolin processing wastewater solids recovery
- Magnetic separation overflow recovery
- Bleaching and purification slurry concentration
- Preparation of kaolin slurry before filter pressing or drying
- Non-metallic mineral slurry dewatering with similar properties
Kaolin Slurry Dewatering Solution
Peony provides the continuous solid-liquid separation section for kaolin processing plants.
Kaolin Ore → Crushing / Grinding → Blunging and Dispersion → Degritting → Hydrocyclone Classification → Magnetic Separation / Bleaching → Kaolin Slurry Tank → Decanter Centrifuge → Thickened Kaolin Slurry / Cake → Filter Press or Dryer
The separated liquid can be returned to the washing system, slurry preparation section, or wastewater recycle circuit.
Peony can provide:
- Decanter centrifuge selected according to kaolin particle size and solids concentration
- Slurry holding tank with agitator
- Controlled feed pump and flow regulation
- Wear-resistant bowl and scroll configuration
- Adjustable differential speed for moisture and solids recovery control
- Clarified liquid collection and recycle connection
- Automatic PLC control system
- Connection to filter press, dryer, storage tank, or tailings treatment system
- Installation guidance, commissioning support, spare parts, and after-sales service
How the Decanter Centrifuge Works in Kaolin Slurry Dewatering
1. Kaolin Slurry Feeding
Kaolin slurry enters the rotating bowl through a controlled feed pipe.
The feed system should maintain stable slurry flow and prevent settling in the pipeline or buffer tank.
2. Centrifugal Sedimentation
Inside the high-speed rotating bowl, centrifugal force separates kaolin solids from water.
Heavier solid particles settle against the bowl wall, while clarified liquid forms the inner liquid layer.
3. Continuous Solids Conveying
The internal screw conveyor rotates at a slightly different speed from the bowl.
This differential speed moves the settled kaolin solids toward the conical end of the bowl for continuous discharge.
4. Clarified Liquid Discharge
The separated liquid flows toward the liquid outlet and can be returned to the kaolin washing circuit, reused as process water, or sent to further treatment.
5. Dewatered Kaolin Discharge
The concentrated kaolin solids are discharged continuously from the solids outlet.
The final solids concentration depends on kaolin particle size, slurry viscosity, feed concentration, bowl speed, differential speed, pond depth, and required throughput.
Technical Parameter
| Model |
Diameter (mm) |
Length (mm) |
Length-to-diameter rate |
G force |
Max solid discharge (m³/h) |
Weight (kg) |
Dimension (L*W*H) (mm) |
| PDC-10 |
250 |
1000 |
4 |
4080 |
0.4 |
1000 |
2410*800*1080 |
| PDC-12 |
4200 |
1350 |
4 |
3500 |
0.6 |
1200 |
2610*800*1080 |
| PDC-12 |
4200 |
1350 |
4.5 |
3180 |
1.2 |
1800 |
3495*840*1180 |
| PDC-18 |
4000 |
1600 |
4.5 |
3180 |
1.2 |
3200 |
3497*1020*1385 |
| PDC-18 |
450 |
2150 |
4 |
2500 |
2 |
3800 |
4447*1080*1385 |
| PDC-20 |
400 |
2250 |
4.5 |
2500 |
3.5 |
4000 |
4580*1140*1470 |
| PDC-21 |
530 |
2280 |
4.3 |
2500 |
5 |
5000 |
4924*1170*1540 |
| PDC-26 |
655 |
2800 |
4.3 |
2270 |
8 |
7000 |
4300*1900*1350 |
When Is a Decanter Centrifuge Suitable for Kaolin Dewatering?
A decanter centrifuge is generally suitable when:
- Continuous operation is required
- Kaolin slurry needs to be thickened before final filtration or drying
- Fine kaolin recovery from process water is important
- Slurry solids concentration changes during operation
- Process water needs to be recycled
- Manual handling of slurry is not preferred
- The plant needs stable and automated solids-liquid separation
For applications requiring very low final moisture, the decanter centrifuge is usually used as a pre-dewatering or thickening stage before a filter press or dryer.
Main Advantages
Continuous Kaolin Slurry Dewatering
The decanter centrifuge operates continuously and is suitable for kaolin plants that require stable slurry volume reduction without repeated batch handling.
Fine Particle Recovery
It can recover fine kaolin solids from dilute slurry or process water, helping reduce valuable material loss.
Adjustable Separation Performance
Bowl speed, differential speed, liquid depth, and feed rate can be adjusted to balance solids recovery, liquid clarity, handling capacity, and discharged solids concentration.
Reduced Load on Downstream Filtration
By thickening kaolin slurry before filter pressing or drying, the centrifuge can reduce the load on downstream dewatering equipment.
Wear-Resistant Configuration
Wear protection can be applied to the bowl, screw conveyor, feed zone, solids discharge area, and other high-wear parts for abrasive kaolin slurry service.
What Data Is Needed for Selection?
To recommend a suitable Decanter Centrifuge for Kaolin Slurry Dewatering, please provide:
- Kaolin product grade and application
- Particle size distribution
- Percentage of particles below 2 μm
- Slurry solids concentration
- Slurry density and viscosity
- Quartz sand or abrasive impurity content
- Required throughput per hour
- Required solids recovery rate
- Required clarified liquid quality
- Target discharged solids concentration
- Current dewatering equipment, if any
- Process water recycle arrangement
- Downstream filter press, dryer, or storage system
- Required control level and electrical standard
FAQ
Can a decanter centrifuge recover fine kaolin particles from process water?
Yes. A decanter centrifuge can recover fine kaolin solids from dilute slurry or process water, helping reduce kaolin loss and improve water recycle efficiency.
Can the centrifuge replace a filter press?
It depends on the required final moisture. A decanter centrifuge is suitable for continuous thickening and primary dewatering. When a very dry kaolin cake is required, a filter press or dryer is usually installed downstream.
What affects kaolin recovery performance?
Main factors include particle size distribution, fine-particle content, feed solids concentration, slurry viscosity, bowl speed, differential speed, liquid depth, feed rate, and polymer use where applicable.
Is wear protection necessary for kaolin slurry?
Wear protection is recommended when the slurry contains quartz sand, silica, grit, or other abrasive impurities. The feed zone, screw conveyor flights, solids discharge port, and bowl cone are common areas requiring protection.
Can the separated water be recycled?
Yes. The clarified liquid can be returned to the kaolin washing process, slurry preparation system, or other process-water recycle points, depending on the required water quality.
Contact Peony for Partnership
Peony welcomes distributor and agent cooperation with kaolin producers, ceramic material companies, paper coating mineral suppliers, non-metallic mineral processing plants, mining contractors, and industrial separation partners.
We support partners with kaolin slurry testing, centrifuge selection, wear-resistant configuration, feed and recycle system design, PLC control integration, installation guidance, commissioning support, spare parts, and after-sales service.
Send us your kaolin slurry analysis, particle size distribution, solids concentration, required capacity, recovery target, target solids concentration, process-water recycle arrangement, and downstream equipment information. Our engineering team will recommend a suitable Decanter Centrifuge solution for your kaolin slurry dewatering project.
