Why control the size of the tire clearance of the rotary kiln

Newsroom

2022-03-14 | Editor:

Because the rotary kiln is complex thermal equipment, the force of the cylinder at the kiln tyre is complex, the ellipticity of the cylinder at the kiln tyre changes, the tyre rotates according to an elliptical trajectory, and the creep and wear of the cylinder under high-temperature factors such as speeding up the change of the gap between the tire and the backing plate, resulting in the destruction of the internal kiln lining by extrusion and tensile stress, causing the refractory bricks to fall off and affecting the safe operation of the kiln.

a.If the gap is large, the deformation of the cylinder will increase, and the stress of the weld between the backing plate and the rotary kiln body will increase, resulting in fracture and shortening the service life of the fire brick; at the same time, the relative sliding between the tire and the backing plate will increase. large, increasing wear and tear.

b.If the clearance is too small, the expansion of the cylinder will cause interference, which will cause the occurrence of necking, and will also cause large deformation of the rotary kiln cylinder.

No matter what kind of deformation, it will cause the refractory bricks to loosen, arrange distortion and fracture, resulting in the dangerous accident of the refractory bricks falling off, and more seriously, the rotary kiln cylinder will crack or even break, resulting in damage to the entire rotary kiln cylinder. Therefore, maintaining a reasonable tire gap to keep the ovality of the cylinder within the standard range is one of the important measures to ensure the long-term safe operation of the rotary kiln.

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