Kaolin calcination rotary kiln for paper and ceramic grade

1.Product Introduction Calcination Rotary Kiln

The Kaolin Calcining Rotary Kiln is a high-temperature, continuous calcination system specifically engineered for the production of paper-grade and ceramic-grade kaolin. By precisely controlling temperature and material residence time, the equipment facilitates the dehydroxylation and phase transformation of kaolinite. This process significantly enhances the product's whiteness, chemical activity, and thermal stability. Featuring an inclined cylinder and slow-rotation structure, the kiln ensures uniform heating and prevents performance degradation caused by local overheating.

2.Application Calcination Rotary Kiln

• Paper Industry: Used as a coating and filler to improve paper opacity, smoothness, and printability; it serves as a cost-effective partial substitute for titanium dioxide ($TiO_2$).

• Ceramics Manufacturing: Utilized in glazes and body additives to increase refractoriness, mechanical strength, and surface gloss for daily-use ceramics and industrial refractories.

• Functional Fillers: Applied in rubber, plastics, and coatings to optimize electrical insulation, heat resistance, and dispersion properties.

3.Working Principle Calcination Rotary Kiln

• Preheating Phase: Raw kaolin passes through a preheater to remove surface moisture and volatiles. A gentle temperature gradient prevents particle bursting.

• Calcination Phase: Materials enter the high-temperature zone (950–1100°C). Kaolinite undergoes dehydroxylation to form metakaolin, which further transforms into silica-alumina spinel or mullite phases to boost chemical activity.

• Cooling Phase: The clinker is rapidly cooled to stabilize the crystalline structure and prevent cracking caused by thermal stress.

• Movement Mechanism: The inclined cylinder causes material to move axially during rotation, creating a continuous tumbling effect and heat exchange interface for reaction uniformity.

4.Advantages Calcination Rotary Kiln

• High-Efficiency Continuous Production: Supports 24/7 non-stop operation with significantly higher capacity and lower unit energy consumption compared to batch kilns.

• Precision Temperature Control: Intelligent heating systems ensure uniform temperature distribution, reducing batch-to-batch variations and guaranteeing consistent whiteness and activity.

• Energy Saving & Environmental Protection: Features waste heat recovery technology to reduce fuel consumption and a sealed structure to minimize dust emissions, meeting strict environmental standards.

• Reliable Structure: Equipped with specialized refractory linings and fish-scale sealing designs to extend equipment lifespan and reduce maintenance requirements.

5.Technical Specifications

6.Our Solutions