High alumina bricks used in tunnel kilns and kilns are generally high alumina bricks with an aluminum content of more than 70%. Brick dimensions must be negative. This is because during production and operation, as the temperature changes, the high alumina bricks will expand. If it has been used for a long time, the joint material will loosen, which will also cause the bricks to hit the kiln wall. What should I do if the high-alumina bricks used for tunnel kiln trucks hit the kiln wall on both sides?
The phenomenon of high alumina bricks hitting the kiln wall is caused by many factors. First, the kiln car bricks have been used for a long time, and the joints of the refractory clay or refractory cotton are worn out, causing the gaps to increase and cause them to hit the kiln wall. Second, the size of the high alumina bricks is positive. When the size of the kiln car bricks is increased during construction, the bricks may also hit the kiln wall during the production process.
If the high alumina bricks used for kiln cars are of regular size or increased in size, the total length of the paved kiln car bricks will increase. During the movement, the kiln car will collapse if it hits the kiln wall, and the products from the collapsed parking space will fall and become blocked in the kiln. As a result, the kiln cars that circulated behind were also blocked and collapsed, making production impossible. In this case, first measure the total length of the kiln car. The total length of the kiln car must be about 6cm shorter than the kiln length, that is, one side is about 3cm shorter. Only in this way, during the production process, if the kiln car’s high-alumina bricks expand at high temperatures, production will not be affected.
But if the total length of the kiln car is longer than the kiln diameter, it must be dealt with. After laying the kiln car bricks, you can use an angle grinder to knock off about 3cm of the bricks and make them smooth on both sides. If high-alumina bricks for kiln cars that are too long are used, they must be dismantled and re-paved. Because the joint materials under high temperatures, such as fire clay, have fallen off, the joints between bricks have increased, resulting in an increase in the total length of the kiln car bricks, affecting use.
Kiln cars are paved with high-alumina bricks, and each manufacturer has different habits. Some are built from the middle seam to both sides. Some are the manufacturer’s own bricks, which can be paved according to the size of their own high-alumina bricks. As long as the total length does not exceed the kiln diameter, they can be used. Do not smash pavement tiles that are too long. Hitting them with a hammer will cause the tiles to break. Try to use an angle grinder to grind it, so as not to cause the high alumina bricks of the kiln car to break or cause the bricks inside to break. It’s just that the edges don’t look good after being polished, and it doesn’t affect use at all.
To buy high-quality high alumina brick refractory bricks, contact us to get free samples and competitive prices.
High Alumina Refractory Blog 