How are refractory bricks wear-resistant?
The wear resistance of a refractory brick in Fireclay Brick Factory is its ability to resist the mechanical abrasion of its surface by solid, liquid and dust-laden airflow. In many cases, the damage to the surface of refractory bricks in Fireclay Brick Factory caused by mechanical wear is often very serious. It is often the direct cause of refractory brick in Fireclay Brick Factory wear from its working surface. Sometimes it is more harmful than chemical attack, or is caused by chemical attack, often aggravated by mechanical action. For example, the refractory brick in Fireclay Brick Factory lining and molten iron ditch in the upper part of the blast furnace are often lost due to insufficient wear resistance. The refractory bricks in Fireclay Brick Factory of the coke oven carbonization chamber are also susceptible to coke wear. The furnace mouth, tapping hole and other places where the air scours and various molten liquids flow through the steelmaking converter are often lost due to poor wear resistance of the material. Therefore, the wear resistance of refractory bricks in Fireclay Brick Factory is an important property.
The wear resistance of refractory bricks in Fireclay Brick Factory depends on the composition and structure of the material. When the material is a dense polycrystal composed of a single crystal, its wear resistance mainly depends on the hardness of the mineral crystals that make up the material. High hardness, high wear resistance of the material. When the mineral crystal is non-isotropic, the grain size is small and the wear resistance of the material is high. When the material is composed of multiple phases, its wear resistance is also directly related to the bulk density or porosity of the material, as well as the bonding strength between the components. Therefore, for a certain kind of refractory brick in Fireclay Brick Factory at room temperature, its wear parts are proportional to its compressive strength, and the products with good sintering also have better wear resistance.
The wear resistance of refractory bricks in Fireclay Brick Factory is related to temperature. For some materials, such as high alumina refractory bricks in Fireclay Brick Factory , it is generally believed that at a certain temperature (such as in the elastic range of 700 ~ 900 °C, especially below), the higher the temperature, the lower the wear resistance. As the modulus increases, the wear resistance decreases. When the temperature increases and reaches the maximum value of the elastic modulus, the wear resistance increases with the decrease of the elastic modulus. Such as high alumina refractory bricks in Fireclay Brick Factory at 1200 ~ 1350 ℃, the wear resistance is even better than those at room temperature. When the temperature is further increased, reaching above 1400 ℃, the viscosity of the liquid phase in the refractory brick in Fireclay Brick Factory decreases sharply, and the wear-resistant parts decrease accordingly. Some refractory bricks in Fireclay Brick Factory , such as chrome-containing products, increase their wear resistance as the temperature rises.
Topower Refractories Co., Ltd. as Fireclay Brick Factory is a high-tech enterprise specializing in the research, development, production and sales of shaped and unshaped products. The main products are: high alumina bricks, insulation bricks, magnesia alumina spinel bricks, clay bricks, unshaped Refractory etc.
