The use process of high-alumina brick includes construction preparation, construction operation, baking and post-maintenance and so on. The following is a detailed explanation:

I. Construction preparation

Check the drawings and technical requirements: determine the variety, model, laying length, progress and technical requirements of high-alumina bricks in various parts of the kiln.

Confirm the construction plan: confirm the construction plan with the users, supervisors and constructors and explain it to the constructors.

Classified storage: classify and store high-alumina bricks according to their shapes, sizes and materials.

Check the kiln: determine the loop line and center line, check whether the kiln is flat, and level it with refractory mud or refractory concrete if necessary.

II. Construction Operation

(1) Handling and cutting:

Handle with care, and do not throw or bump.

Cut the high alumina brick to the appropriate size as required.

(2) Masonry:

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

Masonry mortar joint control in 1~2mm, mortar joint full, cambered surface level off.

Use a wooden hammer or rubber hammer to avoid damage to the brick body.

When the last 5~6 bricks are laid, debug the lock with the lock joint brick.

(3) Construction site treatment:

When the construction site is uneven, first level it with refractory mud or refractory concrete.

Pay attention to the smoothness of brick body and the uniformity of mortar joint during masonry.

III. Baking of Brick Lining

Baking system:

Before 110℃, the heating rate was 30℃/h and the temperature was kept for 2 hours.

110~300℃ heating rate is 40℃/h.

After 300℃, the heating rate is 50℃/h.

Rotary kiln system: 1/4 turn every 30 minutes at 300~500℃; Turn 1/4 turn every 15 minutes at 500~700℃; Low-speed continuous rotary kiln above 700℃.

The total baking time is not less than 16 hours.

Precautions:

Strictly abide by the principle of "slow heating, no turning back, no interruption".

Prevent sudden temperature drop or local overheating.

When the kiln is stopped for more than 2 hours, it is necessary to spray oil intermittently to keep warm.

IV. Post maintenance

Inspection and record: check the construction quality at any time during the construction, and conduct acceptance after the construction is completed.

Moisture-proof and anti-freezing: high-alumina bricks should be rain-proof and moisture-proof during transportation and storage, and stored in a dry and ventilated warehouse. Anti-freezing measures should be taken in winter construction.

Damage treatment: high-alumina bricks with damaged working face, excessive size, no mark or too many cracks are strictly prohibited.

V. Matters needing attention

Construction environment: The construction environment should be kept dry to avoid moisture affecting the construction quality.

Material selection: refractory mud of the same material must be used in wet masonry to avoid construction quality problems caused by material mismatch.

Temperature control: strictly control the heating rate and heat preservation time during baking to avoid damage to the brick body caused by too fast temperature change.