Lightweight Expanded Clay Aggregate LECA Rotary Kiln Calcination

Lightweight expanded clay aggregate (LECA) production kiln

1.Product Introduction Calcination Rotary Kiln

The LECA Production Kiln is a specialized high-temperature rotary kiln designed to transform raw clay into Lightweight Expanded Clay Aggregate. By precisely controlling temperature profiles and material kinetics, the kiln facilitates the dehydroxylation and crystalline expansion of clay, creating porous spherical pellets. This process significantly enhances the material's lightweight properties, thermal insulation, and structural stability. The equipment utilizes an inclined cylinder and a slow-rotation mechanism to ensure uniform heating and prevent performance degradation caused by localized overheating.

2.Application Calcination Rotary Kiln

• Construction Industry: Used to produce lightweight concrete, blocks, and precast components. It reduces structural dead loads and improves thermal insulation for residential, commercial, and bridge engineering.

• Agriculture & Horticulture: Serves as a plant growth medium or soil conditioner, optimizing water retention and aeration to support sustainable cultivation practices.

• Water Treatment & Environmental Protection: Applied in filtration systems to enhance pollutant adsorption for municipal wastewater purification and industrial water treatment facilities.

3.Working Principle Calcination Rotary Kiln

• Preheating & Drying: Raw clay passes through a preheater to remove surface moisture. A gentle temperature gradient prevents particle bursting and ensures the stability of subsequent reactions.

• High-Temperature Expansion: As the material enters the high-temperature zone (approximately 1200°C), internal organic components burn off, forming thousands of tiny gas bubbles. This causes the clay to "bloat" or expand into a porous structure while undergoing phase transformation.

• Cooling & Solidification: The clinker is rapidly cooled to stabilize the pore structure. The rotation of the kiln body moves the material axially, creating a continuous tumbling interface that ensures uniform pellet size and density.

4.Advantages Calcination Rotary Kiln

• High-Efficiency Continuous Production: Supports 24/7 non-stop operation with significantly higher capacity than batch kilns, reducing unit energy consumption and improving output consistency.

• Precision Process Control: An intelligent temperature control system ensures uniform heat distribution, minimizing batch variations and guaranteeing the reliability of the lightweight and porous structure.

• Energy Saving & Eco-Friendly: Incorporates waste heat recovery technology to significantly reduce fuel consumption. The sealed design minimizes dust emissions, meeting environmental standards and supporting saustainable manufacturing.

5.Technical Specifications

6.Our Solutions