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Sewage centrifugal dewatering machine
,shaftless centrifugal dewatering machine
,centrifugal sludge dewatering machine
The Decanter Centrifuge for Phosphate Slurry Dewatering is designed for continuous solid-liquid separation, phosphate solids recovery, slurry thickening, and process-water clarification.
It is suitable for phosphate rock washing, beneficiation slurry, fertilizer-process slurry, phosphate-containing wastewater, and mineral fines recovery. The centrifuge separates phosphate solids from the liquid phase continuously. Thickened phosphate solids can be sent to a filter press, dryer, storage tank, granulation section, or further processing stage. Clarified liquid can be reused in washing, grinding, slurry preparation, or wastewater treatment.
- Phosphate rock slurry thickening
- Phosphate beneficiation wastewater treatment
- Phosphate fines recovery
- Fertilizer-process slurry dewatering
- Phosphate washing-water clarification
- Phosphoric acid process solids recovery
- Filter press feed thickening
- Process-water recycle in phosphate plants
| Process Requirement | Decanter Centrifuge Solution |
|---|---|
| Continuous slurry treatment | Continuous feed and solids discharge |
| Fine phosphate recovery | High centrifugal separation force |
| Variable slurry condition | Adjustable bowl speed and differential speed |
| Abrasive mineral particles | Wear-resistant scroll and discharge protection |
| Water recycle | Clarified liquid for reuse or further treatment |
| Lower downstream load | Thickened slurry before filtration or drying |
| Automatic operation | PLC-controlled continuous running |
Plastic Washing Slurry Dewatering Solution
Peony provides continuous solid-liquid separation for phosphate slurry thickening, solids recovery, and process-water recycle.
Phosphate Washing / Grinding / Classification → Slurry Tank → Optional Flocculant Dosing → Decanter Centrifuge → Thickened Phosphate Solids → Filter Press / Dryer / Storage
Clarified Liquid → Process Water Tank → Recycle to Washing, Grinding, or Further Treatment
Peony can provide:
- Decanter centrifuge selected according to phosphate slurry condition
- Agitated slurry buffer tank for stable feeding
- Controlled feed pump and flow regulation system
- Optional flocculant dosing and mixing system
- Adjustable differential speed and pond depth control
- Wear-resistant scroll, feed zone, and solids-discharge configuration
- Clarified liquid collection and recycle connection
- PLC and VFD automatic control system
- Connection to filter press, dryer, storage, or wastewater treatment system
How the Decanter Centrifuge Works
1. Phosphate Slurry Feeding
Phosphate slurry enters the rotating bowl through a controlled feed pipe.
An agitated slurry tank is normally recommended upstream to prevent settling and maintain stable solids concentration.
2. Centrifugal Sedimentation
Inside the high-speed rotating bowl, centrifugal force separates phosphate solids from the liquid phase.
The denser mineral particles settle against the bowl wall, while clarified liquid remains closer to the center.
3. Continuous Solids Conveying
The internal screw conveyor rotates at a controlled differential speed relative to the bowl.
This movement transports settled phosphate solids toward the conical end for continuous discharge.
4. Clarified Liquid Discharge
The separated liquid leaves through the liquid outlet.
It can be returned to washing, grinding, slurry preparation, process-water recycle, or further wastewater treatment.
5. Thickened Phosphate Solids Discharge
The concentrated phosphate solids are discharged continuously from the solids outlet.
Recovered material can be transferred to a filter press, dryer, granulation section, storage tank, or further mineral processing stage.
| 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 |
Particle Size and Fine Content
Fine phosphate particles may require higher centrifugal force, longer residence time, or flocculant conditioning to improve solids recovery and liquid clarity.
Abrasion Level
Phosphate rock slurry can contain quartz, sand, and silica. Wear protection should be selected according to particle hardness, solids concentration, and operating hours.
Slurry Concentration and Viscosity
High solids concentration or high viscosity may reduce separation capacity. Stable feeding is important for consistent operation.
Corrosion Condition
For acid-related phosphate slurry, pH, temperature, chloride content, fluoride content, and chemical composition should be checked before confirming the material of construction.
Final Moisture Requirement
A decanter centrifuge is mainly used for continuous thickening and primary dewatering. If lower final moisture is required, it can be combined with a filter press, belt filter, vacuum filter, or dryer.
Continuous Phosphate Solids Recovery
The decanter continuously recovers phosphate solids from slurry, wash water, and process wastewater without batch interruption.
Wear-Resistant Configuration
Phosphate slurry may contain sand, quartz, silica, and other abrasive mineral particles. Wear-resistant protection can be added to the scroll, feed zone, bowl cone, and solids discharge area.
Stable Operation for Variable Feed
Bowl speed, differential speed, pond depth, and feed rate can be adjusted according to slurry concentration, particle size, viscosity, and required throughput.
Process-Water Recycle
Clarified liquid can be reused in washing, grinding, or slurry preparation, helping reduce fresh-water consumption and wastewater load.
Lower Filtration and Drying Load
By thickening phosphate slurry before downstream filtration or drying, the decanter helps reduce liquid volume and improve overall handling efficiency.
Please provide the following information for a suitable phosphate slurry dewatering solution:
- Phosphate material type and process stage
- Particle-size distribution
- Fine-particle content
- Slurry solids concentration
- Slurry density and viscosity
- Required processing capacity
- Required phosphate recovery rate
- Target solids concentration after centrifugation
- Clarified liquid quality requirement
- Water recycle requirement
- Sand, silica, or quartz content
- Slurry pH, temperature, and chemical composition
- Flocculant or polymer currently used
- Downstream filter press, dryer, or storage arrangement
- Required material of construction
- Electrical and control standard
Can a decanter centrifuge recover fine phosphate solids?
Yes. It can recover phosphate solids continuously. For very fine particles, flocculant testing or additional clarification equipment may be needed.
Is wear protection necessary?
It is often recommended. Phosphate slurry may contain abrasive mineral particles such as quartz, silica, and sand.
Can clarified liquid be reused?
Yes. Clarified liquid can often be returned to washing, grinding, slurry preparation, or process-water storage.
Can the decanter replace a filter press?
The decanter is mainly used for continuous thickening and primary dewatering. A filter press or dryer may still be needed for lower final moisture.
Can it handle acidic phosphate slurry?
Yes, but material selection, sealing, pH, temperature, chloride content, and fluoride content should be confirmed before final selection.
Peony welcomes distributor and agent cooperation with phosphate mining companies, fertilizer manufacturers, phosphate beneficiation plants, phosphoric acid producers, mineral processing contractors, wastewater treatment companies, and industrial separation partners.
We support partners with slurry testing, decanter centrifuge selection, wear-resistant configuration, corrosion-resistant material selection, flocculant dosing design, process-water recycle integration, installation guidance, commissioning support, spare parts, and after-sales service.
Send us your phosphate slurry information, including particle size, solids concentration, required capacity, recovery target, clarified-liquid requirement, abrasion condition, chemical composition, and downstream handling arrangement. Our engineering team will recommend a suitable decanter centrifuge solution for your phosphate slurry dewatering process.
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