Kaolin Beneficiation Solutions

Solution Overview

As an important non-metallic mineral, kaolin is mainly utilized in two beneficiation processes, namely washing and calcining, according to its characteristics and application requirements. The washed kaolin process is mainly used to remove quartz, feldspar and other impurities to improve the whiteness and purity of the product, while the calcined kaolin process improves the physical and chemical properties through high-temperature treatment to meet the needs of high-end applications.

Washed kaolin beneficiation process

Raw material preparation stage

Crushing and dispersing:

• Jaw crusher rough crushing to -20mm

• Mixing bucket with water for dispersion

• Desander to remove coarse impurities

Classification and purification stage

Hydraulic grading:

• Screw classifier preliminary classification

• Hydrocyclone group fine classification

• Centrifugal sorting machine ultra-fine classification

Bleaching treatment:

• Chemical bleaching (reduction method)

• Iron removal and purification

• Improvement of whiteness

Dehydration and drying stage

Concentration and dehydration:

• High-efficiency thickener concentration

• Filter press dewatering

• Drying system drying

Product processing:

• Raymond Mill

• Classification and Packaging

• Finished product storage

Calcined kaolin beneficiation process

Raw material pretreatment

Selection and purification:

• Washing and purification pretreatment

• Strict control of raw material quality

• Ensure the quality of calcined raw materials

Calcination process

Calcination system:

• Rotary kiln calcination (temperature 850-950 ℃)

• Program temperature control system

• Atmosphere control device

Process control:

• Precise control of calcination temperature

• Holding time optimization

• Cooling rate adjustment

Post-processing section

Crushing and grading:

• Mechanical pulverization

• Air flow pulverization

• Fine Classification

Surface treatment:

• Surface modification

• Performance Optimization

• Packaging and Storage

Core Equipment Configuration

Technical Advantages

Advantages of washed kaolin

• Whiteness up to 85-90

• SiO₂content≤2%.

• Fe₂O₃content≤0.5%.

• Uniform particle size distribution

Advantages of calcined kaolin

• Whiteness ≥93

• Oil absorption value 100-120g/100g

• Strong covering power

• Good chemical stability

Environmental protection and energy saving

• Water recycling

• Heat recovery system

• Comprehensive dust treatment

• Wastewater Treatment

Cooperation Process with OrePartner

Step 1: Ore sample analysis and testing

Sample Requirements:

• Representative ore samples

• Provide basic ore information

• Indicate target product requirements

Experimental content:

• Mineral composition analysis

• Process performance testing

• Beneficiation test study

• Product performance testing

Step 2: Experiment report and technical program

The report contains:

• Detailed ore characterization

• Recommended process program

• Predicted product quality indicators

• Investment and operating cost analysis

Step 3: Decision-making and project implementation

Based on the results of the experimental report, the customer can decide to

• Adopt the recommended solution and enter the implementation stage

• Optimize and adjust the program, supplement the experiment

• Suspend the project and keep the technical data

Technical services and support

Pilot study services

• Ore process mineralogical studies

• Beneficiation tests and process optimization

• Product application performance testing

• Technical and Economic Evaluation

Engineering Design Services

• Process Design

• Equipment Selection and Configuration

• Plant Layout Design

• Automation control system

Production support services

• Equipment installation and commissioning

• Formulation of operating procedures

• Personnel training

• Production optimization guidance

Suggestions for process selection

Common industrial kaolin:

• Adopt water washing process

• Less investment and lower cost

• Meet general industrial requirements

High-end application kaolin:

• Calcined process

• Excellent product performance

• Higher added value

Special requirement kaolin:

• Combined process

• Washing + Calcining Process

• Meet special application requirements

We provide the most economic and efficient beneficiation solutions according to your ore characteristics and product requirements to ensure maximum return on project investment.

Welcome to contact our professional technical team for customized solutions and detailed quotations!