Advantages of high aluminum products:

Advantages of high aluminum products:

High alumina products have higher thermal conductivity than clay bricks, which is related to the reduction of glass phase and the increase of mullite or corundum crystals in high alumina products.

The high-temperature performance of high aluminum products is related to the microstructure of the products, and the high-temperature resistance of the matrix part is much lower than that of the particle part. During use, the slag melts the part first. Therefore, improving and adjusting the matrix composition and structure of the product can be used to enhance its high-temperature performance.

High alumina refractory products are refractory bricks with a w (Al, O,) content of over 48% made by combining a certain amount of high alumina bauxite clinker with clay. High alumina bricks can usually be divided into three categories, namely Class I: w (AI2O3)>75% (generally less than 90% produced from natural high alumina raw materials); Grade II: w (Al, O,)=65% to 75%; Grade III: w (Al, O3)=48% to 65%.

It can also be classified based on its mineral composition, including low mullite (including sillimanite), mullite, mullite corundum, corundum, mullite, and corundum. With the increase of AI, O, and content in the product, the amount of mullite and corundum components also increases, and the glass phase correspondingly decreases, thus improving the fire resistance of the product. When w (AlO) in the product is less than 72%, the only high-temperature stable crystal phase in the product is mullite, which increases with AL and O. The content increases and increases. For high aluminum products with w (AlOs) above 72%, the high-temperature stable crystalline phases are mullite and corundum. As the content of Al, O increases, the amount of corundum increases, while the amount of mullite decreases, correspondingly improving the high-temperature performance of the products.

High alumina bauxite raw material, also known as bauxite, bauxite, bauxite, or bauxite. The structure of bauxite ore is divided into dense, porous, burly, and rough shapes. According to mineral composition, it can be divided into monohydrate type bauxite and trihydrate type bauxite, but mainly composed of boehmite and kaolinite. The production of high alumina bricks requires high alumina alumina clinker. High alumina bauxite clinker is obtained by high-temperature calcination of bauxite raw materials in rotary kilns or vertical kilns, to achieve a certain porosity, water absorption, and volume density, and form a relatively stable phase composition and microstructure. The calcination of bauxite can be roughly divided into three stages: decomposition, secondary mullitization, and recrystallization sintering stage.

The production process characteristics of high alumina bricks are similar to the production process of multi clinker clay products. The production process should be determined based on factors such as the specific production situation, raw material characteristics, product requirements, and production conditions. Strictly classify the clinker blocks before crushing, store and remove iron from the granular materials, and finely grind the mixture of clinker and bound clay.

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