Decanter Centrifuge for Alumina Slurry Dewatering

The Decanter Centrifuge for Alumina Slurry Dewatering is designed for continuous solid-liquid separation, slurry thickening, solids recovery, and process-liquid clarification in alumina and bauxite processing plants.

It can be used to treat alumina hydrate slurry, bauxite washing slurry, red mud slurry, precipitation slurry, classification overflow, and other fine mineral suspensions generated during alumina production.

• Alumina hydrate slurry dewatering
• Red mud slurry thickening
• Bauxite washing-water clarification
• Fine bauxite particle recovery
• Bayer process residue treatment
• Precipitation slurry thickening
• Seed slurry concentration control
• Caustic liquor recovery
• Filter press feed thickening
• Process-water recycling
• Red mud washing and liquor recovery
• Fine mineral solids removal
• Alumina plant wastewater pretreatment

Peony provides continuous solid-liquid separation solutions for alumina slurry dewatering, red mud thickening, mineral residue recovery, caustic liquor clarification, and process-water recycling.

Typical Process Flow

Bauxite Washing / Digestion / Precipitation / Residue Washing → Agitated Slurry Tank → Optional Dosing → Decanter Centrifuge → Thickened Solids → Further Processing / Storage

Clarified Liquid → Process Tank → Recycle

Peony Can Provide:

• Slurry testing and centrifuge selection
• Feed tank and pump system
• Optional dosing and dilution
• Adjustable operating parameters
• Wear-resistant and alkali-resistant design
• PLC automatic control system
• Integration with downstream equipment
• Installation and commissioning support

Alumina Slurry Type

Identify the slurry source, such as alumina hydrate, red mud, or bauxite slurry. Different slurries have varying properties, so centrifuge selection should match the specific process stage.

Particle Size and Fine Content

Fine particles like alumina hydrate and clay may settle slowly. High ultrafine content can affect liquid clarity and require higher centrifugal force.

Slurry Solids Concentration

Feed concentration impacts capacity, torque, and separation performance. Stable feed conditions are recommended for consistent operation.

Alkalinity and Temperature

Some streams contain hot caustic liquor. Key factors like NaOH concentration, temperature, and chemical composition should be considered for material selection.

Abrasive Mineral Content

Hard particles such as silica and quartz can cause wear. Proper wear protection should be selected based on abrasive content and operating conditions.

Continuous Alumina Slurry Dewatering

The decanter provides continuous feeding, separation, and solids discharge, ensuring stable operation for alumina slurry treatment.

Improved Process-Liquid Recovery

Clarified process water or caustic liquor can be recycled back into production, reducing liquid loss and fresh-water consumption.

Stable Slurry Thickening

Key parameters such as bowl speed and feed rate can be adjusted to achieve the required slurry concentration and discharge performance.

Lower Downstream Filtration Load

Pre-dewatering reduces liquid volume before filtration or drying, improving efficiency and reducing load on downstream equipment.

Suitable for Alkaline Process Conditions

Materials and components can be selected to withstand caustic environments, ensuring reliable operation under alkaline conditions.

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

• Process stage
• Slurry type (hydrate, red mud, bauxite residue, etc.)
• Particle size (incl. % <10 μm)
• Solids concentration & density
• Viscosity & temperature
• NaOH concentration & corrosive components
• Required capacity
• Target solids/moisture after separation
• Clarified liquid quality & recovery rate
• Abrasive particle content
• Flocculant type (if any)
• Downstream process
• Material & wear protection requirements
• Operating hours & electrical standard
• Automation level
• Installation space

Peony welcomes distributor and agent cooperation with alumina refineries, bauxite processing plants, mining companies, red mud treatment companies, mineral beneficiation contractors, industrial wastewater companies, and solid-liquid separation partners.

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

Send us your alumina slurry information, including the process stage, slurry type, particle size, solids concentration, sodium hydroxide concentration, operating temperature, required capacity, liquid-recovery target, clarified-liquid requirement, abrasive-particle content, and downstream arrangement. Our engineering team will recommend a suitable decanter centrifuge and process solution for your alumina slurry dewatering application.