How does the brick kiln burn bricks?

Brick kiln is the principle of burning bricks;

1. The raw materials for firing ordinary bricks are clay, shale and coal gangue, which are fired at a high temperature of more than 900 degrees.

There are two kinds of ordinary bricks: green and red. When a brick is baked in an oxidizing atmosphere, it is made into a red brick. If the blue brick is baked in oxidizing atmosphere and then braised in reducing atmosphere, the red ferric oxide in the brick is reduced to blue-gray ferric oxide with low price, which is the blue brick. Blue brick is stronger than red brick, with good alkali resistance and durability, but its price is more expensive than red brick.

3. Brick-making machine pushes out rows of bricks in the noisy rumble.

4. The battery flatbed truck will transfer about 200 newly produced bricks to the air drying site one by one for drying.

5. Send the brick to the drying yard, insert the fork made of iron wire into the freshly made brick, turn around and lay it flat, and the holes seen on the brick are formed in this way.

6. The dried bricks are still sent to the brick kiln by battery car, and it is estimated that there are 6-700 bricks.

7. Brick kilns burn one kiln after another, and the temperature inside can be imagined. The masters are sweating like rain in the courtyard kiln. I forced myself into a kiln of more than 50 degrees and quickly jumped out of the kiln.

8. Behind it, a huge industrial exhaust fan buzzes, carrying the dust of bricks, bringing cool and high-temperature air to the workers.

9. Kiln stacking is also a technical activity, which is neatly stacked and properly ventilated to ensure that each brick can get rhyme temperature when it is burned in the future.

10, this brick kiln should be considered relatively large, and the firing temperature should be properly controlled when firing the brick blank to avoid under-firing and over-firing. Under-fired bricks are dumb in color, low in strength, high in water absorption and poor in durability. Overburned bricks are fragile when struck in dark color, with high strength and low water absorption, but they are bent and deformed. Underfired bricks and overburned bricks are unqualified products.

1 1, the brick kiln is O-shaped, the bricks there are in the yard kiln, and the finished products fired here have been loaded into the kiln. Workers put on red bricks with a residual temperature of 5-60 degrees.

12, full of cars, pulled out to the finished product pile, and cooled down a little. In fact, the outdoor temperature is over 30 degrees at this time. I really don't know what heat is without going into the kiln!

13. Countless finished red bricks are neatly placed on the construction site, and this is it.