Advantages of Sunrise refractory chrome corundum brick for sales
Date:2019-06-05 17:10 From:Zhengzhou Sunrise Refractory Author:admin
The raw materials used in the chrome corundum series are a solid solution which is synthesized by a certain ratio of alumina and chrome oxide and melted at a high temperature. The use of special refractory production process to produce refractory bricks can improve and improve the intrinsic quality of the products and improve the high temperature performance of the products. The chrome corundum brick is initially formed in green color. After high temperature sintering, oxidation reaction occurs, and the color after the reaction changes according to the content of Cr2O3. If the Cr2O3 content is about 3%, the color is light reddish red, and the purple color is around 8%. More than 20% of the color will appear black and red, the higher the chromium content, the more black the color.
1: The load softening temperature of chrome corundum bricks.
It can be seen from the binary phase diagram of AL2O3-Cr2O3 that AL2O3 and Cr2O3 can form a continuous solid solution without eutectic. Therefore, the addition of Cr2O3 to the high-purity corundum material does not reduce the fire resistance of the material, no matter how much. On the contrary, the fire resistance of the material is improved. The refractory degree (>1790 ° C) and the load softening temperature (>1700 ° C) of chrome corundum bricks are superior to high purity corundum products.
2: the strength of chrome corundum brick.
The normal temperature compressive strength of high-purity corundum bricks is generally 70-100 MPa. The normal temperature compressive strength of high-performance chrome corundum bricks is generally >150 MPa, and its strength is significantly higher than that of corundum bricks. This is because the product forms a solid solution of AL2O3-Cr2O3 between the particles and the particles during the firing process. The solid solution links the particles and fine powder together like a bridge, so that the strength of the material is greatly increased. improve.
1: The load softening temperature of chrome corundum bricks.
It can be seen from the binary phase diagram of AL2O3-Cr2O3 that AL2O3 and Cr2O3 can form a continuous solid solution without eutectic. Therefore, the addition of Cr2O3 to the high-purity corundum material does not reduce the fire resistance of the material, no matter how much. On the contrary, the fire resistance of the material is improved. The refractory degree (>1790 ° C) and the load softening temperature (>1700 ° C) of chrome corundum bricks are superior to high purity corundum products.
The normal temperature compressive strength of high-purity corundum bricks is generally 70-100 MPa. The normal temperature compressive strength of high-performance chrome corundum bricks is generally >150 MPa, and its strength is significantly higher than that of corundum bricks. This is because the product forms a solid solution of AL2O3-Cr2O3 between the particles and the particles during the firing process. The solid solution links the particles and fine powder together like a bridge, so that the strength of the material is greatly increased. improve.