Washed kaolin production line and process solution

I. Overview

Kaolin is an important non-metallic mineral, the main component is kaolinite family clay minerals, widely used in papermaking, ceramics, refractory materials, coatings, rubber, plastics, chemical industry and other industries. Washed kaolin process is the key production process to remove impurities and improve the purity and whiteness of kaolin through physical methods (crushing, grading, washing, dewatering, etc.), and this article introduces the complete process flow and solutions of washed kaolin production line in detail.

Main process flow of washed kaolin production line

1. Raw material preparation stage

• Raw ore yard: kaolin raw ore is piled and stored here, which is convenient for subsequent processing.

• Flushing and feeding: the ore is flushed by high-pressure water gun to remove the impurities such as sediment on the surface.

• Pulper: Mix the ore with water and make it into uniform slurry for subsequent sorting.

2. Classification and washing

• Spiral washer: utilizing spiral propulsion to mix and wash the slurry to remove coarse impurities.

• Tumbler screen: sieve materials with different particle sizes and separate the coarse sand and fine particles of kaolin slurry.

• Slurry tank: temporary storage of washed kaolin slurry to ensure the continuous and stable operation of subsequent processes.

3. Hydrocyclone Classification

• Hydrocyclone group: Use centrifugal force to classify the slurry finely and separate kaolin particles with different particle sizes.

  • Overflow (surface flow): fine particle kaolin slurry goes to the next process.

  • Bottom flow: Coarse particles of sand and gravel and other impurities are discharged.

• Staging tank: adjust the slurry concentration to ensure the efficient operation of hydrocyclone.

4. Thickening and dewatering

• Thickening tank: increase the slurry concentration, reduce the subsequent dewatering processing load.

• Dewatering screen: initially remove the free water in the slurry and improve the solid content.

• Plate and frame filter press: deep dewatering of kaolin slurry, forming filter cake with lower water content.

5. Finishing and finished products

• Electromagnetic slurry machine: further remove magnetic impurities such as iron and improve kaolin whiteness.

• Finished product: finally get kaolin concentrate, which can be used in paper, ceramics, coatings and other high-end applications.

Third, the key equipment of washed kaolin production line

1. Pulping machine: crushing the raw ore, forming a uniform slurry.

2. Spiral washer: preliminary removal of coarse impurities.

3. Hydrocyclone group: fine classification, improve product purity.

4. Plate and frame filter press: efficient dewatering, reduce product water content.

5. Electromagnetic slurry machine: remove iron impurities, enhance whiteness.

Fourth, the advantages of washing kaolin process

✔ High-efficiency sorting: adopt hydrocyclone + electromagnetic iron removal technology to ensure the high purity of kaolin.
✔ Energy saving and environmental protection: water recycling, reduce wastewater discharge, in line with environmental requirements.
✔ Automation control: optimize process flow, reduce manual intervention, improve production efficiency.
✔ Flexible adaptation: process parameters can be adjusted according to different ore characteristics to meet customer needs.

V. Main application fields of kaolin

• Paper industry: used as coating pigment to improve paper gloss and printing performance.

• Ceramic industry: as the main raw material of blank and glaze.

• Refractory materials: used in the production of refractory bricks, crucibles and so on.

• Coatings, rubber, plastics: as filler to improve product performance.

• Chemical, medicine, cosmetics: used as catalyst carrier, cosmetic additive, etc.

The washed kaolin production line adopts mature process and advanced equipment configuration, which can efficiently remove impurities and improve product quality, and is suitable for kaolin production needs with different purity requirements. We can provide customized solutions of washed kaolin production line and process according to the specific ore characteristics of customers, and help enterprises to enhance the competitiveness of their products.

If you need more detailed kaolin technical solutions or suggestions on the selection of washing kaolin sorting equipment, welcome to contact us for solutions and quotations!