kiln shell

Kiln Shell/Rotary Kiln Shell

Diameter: 2 meter+   
Application: Cement, electric power, metallurgy, chemical industry, non-metallic minerals and other industries   
Material: Q235c plate and other material steel plate   
Advantages:    
1. Unique heat treatment technology improves wear resistance   
2. High-strength steel for longevity   
3. Customized according to drawings   
4. Large production volume and short cycle time

In many production industries such as building materials, metallurgy, chemical industry, environmental protection, etc., rotary kiln equipment is widely used for mechanical, physical or chemical treatment of solids, powders, gases and other materials. Such equipment and devices are called rotary kilns. The main equipment of the rotary kiln is the kiln shell. The kiln shell is the main body of the rotary kiln. The thickness of the kiln shell steel plate is about 40mm. The best insulation to prevent heat loss becomes the key to the rotary kiln. The traditional kiln shell is built with a layer of refractory bricks or silicon carbide bricks with a thickness of about 200mm in order to better keep the heat. There is an ellipse-shaped deformation, which will put pressure on the kiln brick and affect the life of the kiln brick insulation material. The rotary kiln shell is supported on two supporting rollers with a center angle of about 60° through the tire belt, and the deformation and cross-section of the cylinder are irregular oval. When the rotary kiln shell rotates, every point on the cylinder wall moves along the elliptical trajectory, so the size of the curvature is also constantly changing, so it also forces the refractory bricks in the shell to make corresponding changes, so that the kiln lining sometimes Squeezed, sometimes pulled. When pressed, the refractory bricks are crushed, and when they are pulled apart, the crushed refractory bricks fall off, which is easy to cause the lining of the refractory bricks, and the kiln must be stopped to replace the bricks, which affects the production. Therefore, the designed cross-sectional deformation of the kiln shell should be as small as possible, that is, the cross-sectional rigidity should be as large as possible.

Advantages of Our Kiln Shell

1.The processing technology of the rotary kiln shell affects the quality of the rotary kiln. AGICO Cement rotary kiln shell is rolled from boiler plate, Q235C plate and other material steel plates. It requires high dimensional accuracy and geometric tolerance. Its processing quality directly affects the strength and tightness of the components.   
2.The rotary kiln shell adopts the method of partial forming. According to the detailed requirements of the drawings, the specific production process and welding method of a single-section shell body are formulated. Because the outer circle of the shell is not processed, the verticality of the end face to the center of rotation cannot be directly measured. In the process design, the verticality of the end face is converted into the parallelism and the coincidence of the axes of both ends according to the structural form of the cylinder.   
3.After the cylinder body is assembled and welded, post-weld treatment is required, including non-destructive testing, post-weld heat treatment, and pressure resistance tests to ensure the production of high-quality kiln shell castings.