Kaolin Suppliers & Manufacturers

The journey of kaolin production begins with careful geological surveys and sampling to identify rich deposits. Once a viable source is confirmed, the site is prepared by clearing the land and removing the overburden—the surface material covering the kaolin ore.

Kaolin is typically mined using two primary methods:

Both techniques ensure efficient and sustainable recovery of high-quality kaolin for industrial use.

Slurry Formation

After mining, the kaolin clay is transported to the processing facility, where it undergoes a process called blunging. In this stage, the clay is mixed with water and mechanically agitated to break down lumps into fine particles, forming a smooth slurry.

The resulting slurry is then screened through multiple filters to remove unwanted impurities like sand, quartz, and organic matter, ensuring a cleaner and more refined material for further processing.

Particle Size Control

The kaolin slurry undergoes classification using hydrocyclones or centrifuges to separate fine particles from coarser materials.

This stage ensures uniform particle size distribution, which is essential for meeting the specific requirements of various industrial applications.

Gravity Separation

In this stage, the kaolin slurry undergoes centrifugation to separate materials based on density. Heavier impurities such as sand and grit settle out, while the lighter kaolin particles remain suspended in the slurry.

For high-purity applications, magnetic separators may also be employed to remove iron and other metallic impurities, ensuring a cleaner and more refined final product.

Water Removal

After purification, the kaolin slurry’s water content is reduced using mechanical equipment like rotary vacuum filters or filter presses.

This process produces a kaolin cake, which is then further dried or processed to reach the desired moisture level suitable for packaging and final use.

Heat Treatment

In certain applications, kaolin undergoes calcination, where it is heated in a kiln at temperatures between 1,000°C and 1,200°C. This process removes water molecules from the kaolin’s structure and alters its physical properties.

Calcined kaolin offers enhanced brightness, increased hardness, and reduced shrinkage, making it ideal for high-performance uses in premium paper, paints, and advanced ceramics.

Coating & Surface Treatment

To enhance kaolin’s performance in specific applications, it is often treated with chemical coatings such as dispersants, surfactants, or coupling agents.

These surface treatments improve compatibility with other materials, making treated kaolin an ideal functional filler in industries like plastics and rubber, where enhanced bonding with polymers is essential.

Final Moisture Reduction

Following initial dehydration, kaolin is further dried using rotary dryers or spray dryers to reduce moisture content to the desired level, typically below 1%.

The dried kaolin is then finely milled with equipment such as hammer mills, ball mills, or air classifier mills, ensuring it meets the precise particle size requirements of various industrial applications.

Final Product Handling

After achieving the required particle size and moisture content, the kaolin powder is carefully packaged in bulk bags or smaller sacks based on customer needs.

The finished product is then shipped to clients across diverse industries such as paper manufacturing, ceramics, rubber production, and more, ensuring reliable delivery and consistent quality.