In the process of using refractory bricks, the following matters should be paid attention to to to ensure the construction quality, prolong the service life and ensure the safety of operation:

I. Preparation before construction

Material inspection: Refractory bricks and supporting materials (such as refractory mud, anchors, etc.) must have qualified quality certification documents, and all indicators must meet the design and specification requirements.

Check the appearance and size of the arrived refractory bricks to ensure that there are no problems such as damage, missing corners or cracks.

Refractory bricks should be stored in a dry warehouse to avoid moisture.

Construction environment preparation:

Clean the dust and slag on the inner wall of the kiln shell to ensure that the inner wall is flat without unevenness.

Check and fix all anchors and hooks to ensure that they are installed securely.

The construction site should be kept dry to prevent rain and water from affecting the construction quality.

Preparation of personnel and tools: Construction personnel must receive safety training, master operation specifications and risk warnings, and it is forbidden to work after drinking or fatigue.

Check whether the tools and equipment are in good condition. If problems are found, report them immediately and seek maintenance or replacement.

II. Matters needing attention in masonry process

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

Brick joints should be filled with refractory mud, and the fullness of mud should be greater than 90%.

Treatment of expansion joint: the vertical expansion joint of brick wall should be stuffed with fiber blanket, and the width and verticality of expansion joint should be controlled by wooden strips on the outside.

The cotton of expansion joint should be packed tightly, the surface should be smooth and flush with the brick wall.

Brick masonry: each brick should be placed smoothly and knocked with a wooden hammer or leather hammer to make the combination between bricks firm.

Brick lining should be closely attached to the cylinder, leaving no gap.

The lining of important parts and complex parts should be pre-laid.

Safe operation: The construction personnel must wear appropriate personal protective equipment, such as fire protection clothing, gloves, glasses, etc.

Direct contact with refractory mud by hand is strictly prohibited, and special tools should be used.

For the area where the masonry height exceeds the height range of workers, scaffolding with sufficient height should be built, and safety fences and safety ropes should be set up.

III. Baking and cooling

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.

The temperature in the kiln is controlled to be not more than 1000℃, and the surface temperature of the cylinder is not more than 300℃.

Cooling process: the heating and cooling rates need to be controlled to avoid the damage of refractories due to rapid temperature change.

After the baking operation, close all valves and kiln doors to minimize the speed of natural cooling.

IV. Later Maintenance and Demolition

Maintenance inspection:

Regularly check the use of refractory bricks and repair damaged parts in time.

Keep the construction environment clean and prevent sundries and dust from entering the brick joints.

Precautions for demolition:

During the demolition process, attention should be paid to controlling harmful factors such as dust, smoke and high temperature, and if necessary, wet demolition or wearing respiratory protective equipment should be adopted.

After the demolition operation is completed, the work site shall be cleaned in time, and the waste materials and equipment shall be disposed of according to the regulations.

By strictly observing the above precautions, the construction quality of refractory bricks can be effectively improved, their service life can be prolonged, and the safety of operation process can be ensured.