Decanter Centrifuge for Carbon Black Slurry Dewatering

The Decanter Centrifuge for Carbon Black Slurry Dewatering is designed for continuous solid-liquid separation, carbon black recovery, slurry thickening, and process-water clarification.

It is suitable for carbon black production, pigment slurry treatment, rubber and plastic masterbatch processes, conductive carbon material recovery, ink and coating wastewater treatment, and carbon-black-containing process water.

The centrifuge continuously separates carbon black solids from the liquid phase. Thickened carbon black slurry is discharged for filtration, drying, pelletizing, reuse, or further processing. Clarified liquid can be returned to the washing process, slurry preparation section, recycle-water tank, or wastewater treatment system.

• Carbon black washing slurry dewatering
• Carbon black pelletizing process water recovery
• Carbon black fines recovery
• Carbon black pigment slurry treatment
• Conductive carbon slurry recovery
• Rubber and plastic masterbatch wastewater treatment
• Ink, coating, and colorant process-water clarification
• Recovered carbon black processing
• Pyrolysis carbon black washing and dewatering
• Carbon-black-containing wastewater thickening

Peony provides continuous solid-liquid separation for carbon black recovery, slurry thickening, and process-water recycle.

Peony can provide:

• Decanter centrifuge selected according to carbon black particle size and slurry condition
• Agitated slurry buffer tank for stable feeding
• Controlled feed pump and flow regulation system
• Optional polymer dosing and mixing arrangement
• Adjustable differential speed and pond depth control
• Sealed feed and discharge configuration
• Clarified liquid collection and recycle connection
• PLC and VFD automatic control system
• Connection to filter press, dryer, pelletizing, storage, or wastewater treatment system

Fine Particle Recovery

Carbon black particles can be very fine and may remain suspended in water, especially when the slurry contains dispersants or surfactants. Separation testing is recommended when high recovery or strict clarified-water quality is required.

Slurry Viscosity and Dispersion

High-viscosity slurry may reduce settling performance and throughput. Feed concentration, shear sensitivity, and mixing conditions should be considered during selection.

Polymer Compatibility

Polymer can improve solids recovery and liquid clarity in some duties, but overdosing can affect downstream filtration, drying, product purity, or water reuse. Polymer selection should be based on slurry testing.

Final Solids Condition

A decanter centrifuge is mainly used for continuous thickening and primary dewatering. When lower final moisture is required, it can be combined with a filter press, vacuum filter, centrifuge dryer, or thermal dryer.

Water Reuse Requirement

For wash-water or process-water recycle, the clarified liquid quality should be evaluated based on suspended solids, residual additives, conductivity, pH, and the next process requirement.

Continuous Carbon Black Recovery

The decanter continuously recovers suspended carbon black solids from slurry, washing water, and wastewater streams without stopping for manual discharge.

Stable Operation for Variable Feed

Carbon black slurry may vary in solids concentration, dispersion condition, viscosity, surfactant content, or residual chemicals. The bowl speed, differential speed, pond depth, and feed rate can be adjusted to support stable separation.

Process-Water Recycle

The clarified liquid can be routed back to slurry preparation, washing, cooling, or process-water storage. Where stricter water quality is needed, it can be sent to polishing filtration or further treatment.

Optional Polymer Dosing

Fine carbon black particles may remain suspended, especially in low-solids or highly dispersed slurry. A polymer dosing and mixing system can be added where testing confirms that flocculation improves recovery or liquid clarity.

Closed and Clean Handling

The enclosed design helps reduce slurry splashing and keeps carbon black-containing liquid inside the separation system, supporting a cleaner production environment.

Please provide the following information for a suitable carbon black slurry dewatering solution:

• Carbon black type and product application
• Particle-size distribution and fine-particle content
• Slurry solids concentration and viscosity
• Required processing capacity
• Required carbon black recovery rate
• Target solids concentration after centrifugation
• Clarified liquid quality and water-recycle requirement
• Surfactant, dispersant, or additive content
• Polymer or flocculant currently used
• Downstream filter press, dryer, pelletizing, or storage arrangement
• Required material of construction
• Electrical and control standard

Peony welcomes distributor and agent cooperation with carbon black producers, recovered carbon black processors, pigment and colorant manufacturers, rubber and plastic masterbatch plants, conductive carbon material suppliers, ink and coating manufacturers, wastewater treatment companies, and industrial separation partners.

We support partners with carbon black slurry testing, decanter centrifuge selection, fine-particle recovery evaluation, polymer dosing design, sealed feed and discharge configuration, process-water recycle integration, installation guidance, commissioning support, spare parts, and after-sales service.

Send us your carbon black type, particle size, solids concentration, slurry viscosity, required capacity, recovery target, clarified-water requirement, additive content, and downstream handling arrangement. Our engineering team will recommend a suitable decanter centrifuge solution for your carbon black slurry dewatering process.