What are the precautions for laying refractory bricks

Refractory bricks, as an important lining material for kilns, play a crucial role in high-temperature environments. The quality of its masonry is directly related to the service life and operational efficiency of the kiln. This article will provide you with a detailed explanation of the key precautions during the brick masonry process, helping you better complete this important task.

1、 Preparation before masonry

Before laying refractory bricks, it is necessary to ensure that the center point of the kiln wall is accurate and accurate. This is because the deviation of the center point may lead to interruption of masonry or the need for rework and brick removal, thereby increasing unnecessary costs and time.

2、 Masonry method

1. Misaligned masonry: Refractory bricks should be staggered to avoid misalignment. This means that flatness should be maintained between layers and blocks, and no unevenness should occur.

2. Keep level: The lining after masonry should be kept level and no tilting is allowed. This is to ensure the stability of the kiln lining and the uniform stress on the bricks.

3. Control the width of the gray joint: The width of the gray joint should be reasonably controlled. If it is found that the width of the mortar joint varies, it can be adjusted by selecting suitable bricks.

4. Avoid double joints and through joints: During the masonry process, there should be no double or through joints. The double seam or adjacent through seam of the upper and lower layers cannot be at the same point.

5. Use a wooden hammer for alignment: When laying bricks, a wooden hammer should be used for alignment. After the mud has dried, do not strike the masonry again.

3、 Inspection during masonry process

During the masonry process, expansion joints, through joints, and holes should be regularly inspected. If these parts are not handled in a timely manner, they may affect the quality of brick masonry and the normal operation of the kiln.

4、 Treatment after masonry

The lining after masonry shall not have any rough joints. Tools should be used to fill the joints to ensure the integrity and sealing of the lining.

5、 Treatment of special parts

For refractory bricks that require pre processing, identification should be done in advance before masonry to avoid affecting construction progress and quality. For bricks with high requirements, fine processing should be carried out to control their length, width, and height, ensuring that the dimensional error can meet the specified brick joint requirements.

6、 The use of mud

The mud used should be free from mixing. Mixing slurry may affect the sealing of brick joints and the bonding strength of bricks.

The construction of refractory bricks is a highly technical and demanding task. During the masonry process, it is necessary to strictly follow the above precautions to ensure the quality and stability of the kiln lining. At the same time, it is also very important to provide professional training for construction personnel, which helps them better understand and execute masonry tasks, and timely handle construction problems.