CastableRefractory1

Low Creep High Alumina Brick Properties In the development of low creep high alumina bricks, a certain amount of quartz particles are generally added. There are different views on the action and effect of quartz particles. It is generally believed that the effect of adding quartz has two main aspects, namely, increasing the viscosity of the high temperature liquid phase and utilizing the expansion effect and the expansion stress effect produced by the unbalanced reaction to improve the load resistance. The addition of quartz particles to the low creep  high alumina brick can increase the SiO2 content in the liquid phase, increase the degree of crosslinking of the silicon oxytetrahedron in the liquid phase, and increase the viscosity. At the same time, due to the presence of part of Al2O3 in the matrix, it has strong diffusion ability at high temperature, and Al3+ diffuses into the quartz particles to form an aluminosilicate layer with cristobalite as the core. Al2O3 reacts ...

The blast furnace hot blast stove is one of the important auxiliary equipments of the blast furnace. It is a regenerative heat exchanger that can provide a certain temperature of hot air for the efficient operation of the blast furnace, that is, it will burn the coke burning air in the blast furnace. From normal temperature to high temperature (about 1200~1350 °C), the air volume should be sufficient, and the supply should be continuous. Therefore, each blast furnace generally needs to be equipped with 3 to 4 hot blast stoves for heating and air supply alternately. Recently, one of the contents of the modernization of blast furnace ironmaking technology is the use of high air temperature technology, which is also an indispensable important condition for ironmaking production. Therefore, both foreign and domestic have always put the work of raising the temperature of the hot stove to an important agenda. The practical experience proves that the hot air temperature can not only reduce ...