Construction Instructions for Anti-flaking High Alumina Bricks

This description applies to the masonry construction, baking, and application of anti-flaking high-alumina bricks on thermal equipment. This article introduces the construction, baking, and application of anti-flaking high-alumina bricks from the aspects of construction preparation, construction process, baking of brick linings, technical requirements, precautions, etc. Some construction requirements for aluminum bricks.

Construction Preparation

1. Check the drawings to determine the variety, model, masonry length, progress, and various technical requirements of each part of the kiln.

2. Confirm the construction plan with the user, supplier supervisor (if necessary), and the construction party, and be responsible for explaining it to the construction personnel.

3. According to the construction sequence, anti-flaking high-alumina bricks are stored according to shape, size, material, etc.

4. Kiln inspection, determination of ring line and center line.

Construction in Progress

1. Anti-flaking high-alumina bricks must be handled with care during transportation. Throwing or impact damage is strictly prohibited.

2. For wet masonry, refractory mud of the same material must be used.

3. If a bricklaying machine is used for construction, it can be operated continuously; if a cross-support or one-line support method is used, the masonry regulations must be strictly followed.

4. The mortar joints in masonry are 1~2mm.

5. When striking and aligning, a wooden hammer or rubber hammer must be used. After the mud has dried, the masonry must not be struck again.

6. The entire masonry requires full mud, straight mortar joints, flat arc surfaces, uniform mortar openings, and tight joints.

7. When the last 5 to 6 bricks are left, locking bricks must be used in advance with debugging. When appropriate, iron plates should be added to wedge them tightly.

8. When the construction site is uneven, it must be leveled with refractory mud or refractory concrete before laying bricks.

Brick Lined Baking

The heating rate is 30℃/h before 110℃, and the temperature is maintained at 110℃ for 2 hours. The heating rate is 40℃/h from 110 to 300℃. The heating rate is 50℃/h after 300℃. There should also be

Corresponding rotary kiln system: based on the temperature at the end of the kiln, 1/4 turn every 30 minutes at 300~500℃, 1/4 turn every 15 minutes at 500~700℃, continuous low-speed rotation above 700℃

kiln to normal production. The total kiln time is controlled at 20 hours, at least no less than 16 hours.

Skills Requirement

1. Baking is a key link in the use effect of anti-flaking high-alumina bricks, so the baking system and the principle of “slow heating, no turning back, no interruption” should be strictly followed.

Therefore, a sudden drop in temperature or local overheating of the brick lining is not allowed to occur during the baking process.

2. If the kiln is temporarily shut down to deal with a fault, if it exceeds 2 hours, oil must be sprayed into the kiln intermittently to maintain heat preservation to keep the firing zone from going out.

3. Give priority to prevention, and ensure the normal operation of each system and the stability of process batching and thermal systems. Abnormal supply of materials and coal and internal stagnation of the system are strictly prohibited.

Materials, clogging, improper flame position, etc. At the same time, special attention should be paid to the maintenance of the firmness of the kiln skin of the firing belt and timely replacement.

4. The transportation and storage of anti-flaking high-alumina bricks must be rain-proof and moisture-proof, and stored in a dry and well-ventilated warehouse.

5. Antifreeze measures should be taken during winter construction.

6. Keep records during the masonry construction, baking, and application processes for future reference.

Precautions

1. It is strictly prohibited to use refractory bricks whose working surface is damaged, whose dimensions are seriously exceeded, unmarked, or have excessive cracks.

2. Users, supervisors, and construction parties should check the construction quality during the construction process at any time.

3. After construction is completed, construction acceptance will be carried out.