When using refractory clay brick, the following matters should be paid attention to to to ensure its performance and service life:

I. Preparation before construction

Cleaning the inner wall of the kiln: before laying, the dust and slag on the inner wall of the kiln must be thoroughly cleaned to ensure that the inner wall is flat and uneven.

Flat base: If it is a new kiln, it is necessary to ensure that the base is flat and waterproof; If it is to repair the kiln, it is necessary to clean up the old refractory and repair the damaged part of the base.

Material preparation: ensure that the required clay refractory bricks, refractory mud and tools are complete.

II. Masonry process

Brick joint control: the gap between refractory bricks should be controlled between 1.5 mm and 2 mm.

Use special mortar: use special mortar for refractory bricks to bond refractory bricks to ensure full joints between bricks.

Leave expansion joints: Leave appropriate expansion joints between refractory bricks, usually between 1.5 mm and 2 mm..

Staggered masonry: each layer of brick should be staggered masonry to increase the stability of the overall structure.

Avoid machining: Do not chisel bricks on refractory brick masonry, and use wood hammer and rubber hammer to align when laying bricks.

Requirements for processing bricks: when processing bricks, the processing surface of bricks should not face the inside of the furnace, and bricks with a width less than 1/2 or a thickness less than 2/3 of the original bricks should not be used.

Check the flatness and verticality: After each layer of brick is laid, check its flatness and verticality with level and plumb hammer, and make adjustments if necessary.

III. Baking and heating

Initial heating: When the kiln is used for the first time, the temperature should be raised slowly and gradually in stages to avoid cracking of refractory bricks due to rapid temperature change.

Baking process: Baking should be carried out in strict accordance with the baking curve to ensure the structural stability of refractory bricks and the safety of the kiln.

IV. Matters needing attention during use

Temperature control: during use, keep the internal temperature of the kiln stable and avoid frequent temperature fluctuations.

Avoid alternating cold and hot: Try to avoid the use of refractory bricks in alternating cold and hot environment to prevent cracks and damage on the surface.

Prevent mechanical collision: When moving or installing refractory bricks, handle them gently to avoid hitting hard objects or heavy objects.

V. Maintenance and inspection

Regular inspection: check the refractory bricks in the kiln regularly, and find and repair cracks and damaged parts in time.

Repair damaged parts: If the surface of refractory brick is damaged or falls off, it should be filled with special refractory repair materials in time.

Keep dry: Refractory bricks should be stored in a dry and ventilated environment to avoid contact with corrosive substances such as acid and alkali.

VI. Other considerations

Environmental control: keep the environment around the kiln dry, and avoid excessive water vapor from entering the kiln, so as to prevent the firebrick from cracking due to thermal expansion after absorbing water.

Reasonable use: avoid severe mechanical impact or chemical erosion in the kiln to protect the structure and performance of refractory bricks.

By following the above precautions, the service life of refractory clay brick can be effectively prolonged, and its performance and safety in high temperature environment can be ensured.