What Measures Can Effectively Prevent The Loosening Of Refractory Bricks

Refractory bricks sometimes become loose in masonry, which brings great hidden dangers to the normal use of the kiln, and at the same time, it will also affect the normal use. From the perspective of the loosening site, the gap between the brick and the brick contact surface is large, the ring seam is large, the bottom surface of the brick is not close to the kiln shell, the uniformity of refractory mud is poor, and the surface of the brick is uneven. It may be the cause of the loosening, so what measures can effectively prevent this problem?

1. Strengthen the maintenance and maintenance of equipment at ordinary times

In view of the insufficient working pressure of the refractory bricklaying machine, it is necessary to strengthen the usual maintenance and maintenance of the equipment. To ensure the effectiveness of the oil-water separator, the air storage tank must be drained frequently, and the air compressor must be operated normally during the construction process to ensure that the pressure of the compressed air is within the range of 0, 55MPa to 0, 65MPa.

2. Instructions for Locking Bricks

When locking the bricks, make sure that the bottom surface of the kiln bricks is as close as possible to the inner wall of the kiln. After locking one ring, start to build the next ring. After all the masonry is completed, the kiln should be locked and the iron plate should be tightened. Try to tighten as much as possible below the center line of the rotary kiln to ensure that there are locking iron plates at 90°, 180°, 270°, and 360° on the circumference of the kiln. Two locks are not allowed in the same brick gap. iron plate.

3. Solve the problem of twisting ring seams

Before the refractory bricks are built, a hoop line is placed every 2m in the kiln shell, and the hoop line should be parallel to the circumferential weld of each section of the shell. When paving the refractory bricks, the construction must be based on the axial line and the loop line. Check every 5 loops of the bottom paving to measure whether the distance between the loop seam and the loop line is consistent. Adjust the next few loops according to the distance deviation. The adjustment is in place in one step, and it should be adjusted step by step. At the same time, the ring seam should be controlled within 2mm, and the coincidence of the axis must be ensured during adjustment.

4. Avoid processing bricks

Avoid processing bricks as much as possible. If the length of the processed bricks is less than 60% of the original brick length, the adjacent ring of standard bricks should be removed, and the standard bricks and small processed bricks should be used for staggered masonry to eliminate ring joints. It must be wet-laid, and the effect of using high-temperature cement is better. If the length of the processed brick is less than 50% of the original brick length, the lengthened brick (the brick length is 298mm) can be used for processing and masonry.

5. Comprehensive consideration of kiln shell deformation and other conditions

In the masonry process, the deformation of the kiln shell and the irregular brick size should be considered comprehensively. The masonry can neither be built in strict accordance with the proportion of bricks nor blindly built. In short, two principles must be mastered: the surface of refractory bricks should not There are steps; the bottom surface must be in full contact with the inner wall of the kiln shell.