Decanter Centrifuge for Calcium Carbonate Slurry Dewatering

The Peony Decanter Centrifuge for Calcium Carbonate Slurry Dewatering is designed for continuous thickening, dewatering, and recovery of calcium carbonate slurry from grinding, classification, coating, precipitation, washing, and mineral processing lines.

It is suitable for both ground calcium carbonate (GCC) and precipitated calcium carbonate (PCC) slurry where continuous solids recovery and process-water reduction are required. 

For very fine PCC, coating-grade calcium carbonate, or slurry with low settling velocity, feed conditioning or polymer dosing may be required to improve recovery and clarified liquid quality.

• Ground calcium carbonate slurry dewatering
• Precipitated calcium carbonate slurry thickening
• GCC washing water recovery
• PCC crystal slurry separation
• Calcium carbonate coating slurry concentration
• Filler-grade calcium carbonate recovery
• Paper coating calcium carbonate slurry treatment
• Plastic and rubber filler slurry dewatering
• Calcium carbonate grinding circuit water recovery
• Mineral processing slurry concentration
• Calcium carbonate residue recovery before filter pressing
• Process-water recycle from calcium carbonate production lines

Peony provides the continuous solid-liquid separation section between calcium carbonate slurry preparation and downstream filtration, drying, storage, or water recycle.

Calcium Carbonate Grinding / Precipitation → Classification / Washing → Slurry Tank → Optional Polymer Dosing → Decanter Centrifuge → Thickened Calcium Carbonate Solids → Filter Press / Dryer / Storage

Clarified Liquid → Process Water Tank → Recycle to Grinding, Washing, or Slurry Preparation

Peony can provide:

• Decanter centrifuge selected according to GCC or PCC 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
• Wear-resistant scroll and solids-discharge configuration
• Clarified liquid collection and recycle connection
• PLC and VFD control system
• Connection to filter press, dryer, storage tank, or wastewater treatment system

Calcium Carbonate Type

Ground calcium carbonate and precipitated calcium carbonate can have different particle size, morphology, settling behavior, and water retention characteristics. These factors affect centrifuge selection.

Particle Size Distribution

Fine PCC or coating-grade calcium carbonate may settle more slowly than coarser GCC particles. Fine-particle recovery requirements should be confirmed before equipment selection.

Feed Solids Concentration

Stable feed concentration is important for consistent solids discharge and clarified liquid quality. Large concentration changes may require feed control or buffer tank adjustment.

Slurry Viscosity

High-viscosity slurry may affect sedimentation and scroll conveying performance. Differential speed and torque protection should be selected according to the actual slurry condition.

Final Moisture Requirement

A decanter centrifuge is suitable for continuous thickening and primary dewatering. When very low moisture is required for powder production, it is usually followed by a filter press, vacuum filter, flash dryer, spray dryer, or other drying equipment.

Continuous Calcium Carbonate Recovery

The decanter centrifuge continuously recovers calcium carbonate solids from process slurry, reducing manual handling and batch operation.

Suitable for GCC and PCC Slurry

The centrifuge can be configured for different calcium carbonate grades, including ground calcium carbonate, precipitated calcium carbonate, coating-grade material, and industrial filler products.

Adjustable Separation Performance

Bowl speed, differential speed, pond depth, and feed rate can be adjusted to balance throughput, solids recovery, liquid clarity, and discharged solids concentration.

Process-Water Recycle Support

Recovered liquid can be routed back to grinding, washing, slurry preparation, or other process-water reuse points when water quality allows.

Wear-Resistant Configuration Available

For slurry containing silica, quartz sand, or abrasive mineral impurities, wear protection can be applied to the feed zone, scroll flights, bowl cone, and solids discharge section.

Please provide the following information for a suitable calcium carbonate slurry dewatering solution:

• Calcium carbonate type, such as GCC or PCC
• Product grade and final application
• Particle-size distribution
• Percentage of fine particles
• Slurry solids concentration
• Slurry density and viscosity
• Required processing capacity
• Required solids recovery rate
• Required clarified liquid quality
• Target solids concentration after centrifugation
• Polymer or flocculant currently used
• Abrasive impurity content, such as silica or quartz
• Process-water recycle requirement
• Downstream filter press, dryer, or storage arrangement
• Required material of construction
• Electrical and control standard

Peony welcomes distributor and agent cooperation with calcium carbonate producers, mineral processing plants, paper coating material suppliers, plastic and rubber filler manufacturers, grinding-system contractors, and industrial separation partners.

We support partners with slurry testing, decanter centrifuge selection, polymer dosing design, wear-resistant configuration, feed and recycle system integration, installation guidance, commissioning support, spare parts, and after-sales service.

Send us your calcium carbonate type, particle size, slurry solids concentration, viscosity, required capacity, clarified-water target, final moisture requirement, and downstream handling arrangement. Our engineering team will recommend a suitable Decanter Centrifuge solution for your calcium carbonate slurry dewatering process.