There are many types of high alumina bricks, including special grade, first grade high alumina brick, second grade high alumina brick, and third grade high alumina brick. Of course, the price of special high-alumina bricks is the best, and the aluminum content is the most. Today, I will introduce the production process of the next special high-alumina bricks: the production process of high-alumina bricks and multi-clinker clay bricks are similar, but the difference lies in the clinker in the ingredients. The proportion is relatively high, which can be as high as 90-95%. The clinker needs to be sorted and sieved to remove iron before crushing. The firing temperature is relatively high. For example, when high alumina bricks such as I and II are fired in a tunnel kiln, they are generally 1500~1600 ℃.
Production practice in China has proved that before crushing, high-aluminum clinker is strictly sorted and classified, and stored in tiers. The use of bauxite clinker and combined clay fine grinding method can improve product quality.
Properties and uses High alumina bricks have high refractoriness, strong resistance to acid and alkaline slag erosion, and high temperature mechanical strength, so they are widely used in the metallurgical industry and other furnaces.
The density of high alumina bricks is determined according to the price. The general density is between 2.3-2.5g/cm3. The higher the density, the more expensive the price. The first grade high alumina bricks generally require more than 2.4 in the industry, and it is enough.
High alumina bricks are divided into four grades according to the aluminum content. The aluminum content of the third-level high-alumina bricks is not less than 55 percent, the second-level high-alumina bricks are not less than 65, and the first-level high-alumina bricks are not low. At 75, the aluminum content of super high alumina brick is above 85. As for the shape of high alumina bricks, in addition to standard high alumina bricks, there are also general high alumina bricks, also called special-shaped high alumina bricks. If the shape is very irregular, they are usually called special high alumina bricks. In short, according to the specific use of the kiln Come to make to order.
