Runner Brick

Runner brick with clay, shale, coal gangue and fly ash as the main raw materials, bricks with solid or porosity not more than 15% after molding and roasting.

Features and advantages:

1. High refractoriness.

2. Good spalling resistance and wear resistance.

3. Good corrosion resistance.

4. Good thermal shock resistance.

5. High mechanical strength.

6. High-temperature creep rate is low.

7. Good volume stability at high temperature.

Application

The use of it is more and more in industrial production. The place where its figure appears more is generally in the kiln. 

Almost all high-temperature furnaces need to be cast , such as iron-making blast furnaces, steel-making converters, refining furnaces, electric furnaces and other drying equipment, muffle furnaces, etc., high-temperature differential calorimeters are also used. Refractory bricks are mostly used in the lining of high-temperature industrial kilns. Such as blast furnaces, hot blast furnaces, converters in the iron and steel industry; colored reverberatory furnaces, rotary kilns, etc. They are used in construction kilns and various thermal equipment, such as metallurgy, chemical industry, power, garbage incinerators, cement kilns, feed boxes, coolers and circulating fluidized bed boilers, air distribution plates, slag discharge pipes, Furnace, cyclone separator, etc.

The purpose of runner brick can be roughly summarized by the above content. Now, the use of their family has penetrated into many industries. With the kiln as a companion, in the case of high temperature, it has slowly completed its life. Very ordinary but great.

How to runner brick against chemical intrusion ？

The ability to resist various corrosive substances under high temperature, such as solid materials, furnace gas, slag or melt, is called the chemical resistance of refractories. Chemical erosion is one of the main factors leading to its high temperature damage, and its erosion mechanism is also very complicated, generally including: physical and chemical effects such as scouring or friction, penetration, diffusion, melting, chemical reaction and so on.

Chemical composition and properties: general requirements: purity should be high and impurities should be extremely low, especially the content of harmful harmful substances should be strictly controlled; the chemical reactivity with the corrosives is low, and have the same (or similar) acidity or alkalinity .

Mineral composition and microstructure: when the content of the crystalline phase in the material is high, the melting point of the crystalline mineral in the matrix is high, the quantity is large, the high-temperature liquid phase is small, the viscosity is large and the dispersion state is shown, it will show a good Chemical resistance.

Porosity: Obvious porosity is a shortcut for the penetration of the erosion material into the material, and can significantly increase the contact area between the erosion material and the material. The apparent porosity of the material is low, and the pore size is very small, which can often effectively prevent the penetration of the erosions, thereby helping to enhance its chemical resistance.

Viscosity of the erosion material: When the viscosity of the gaseous or liquid erosion material is small, its contact with the surface of the refractory material will be significantly improved, even wrapping the material, making the erosion material easy to penetrate and diffuse into the material. When the viscosity of the erosion material is high, its penetration and diffusion effects are not significant, and sometimes it will prevent further penetration and diffusion into the material. The viscosity of the attack is mainly related to its chemical composition and temperature.

Temperature: When the temperature is higher, it will reduce its chemical resistance. In engineering, proper cooling measures are often adopted for the lining. The main purpose is to reduce the temperature, delay and prevent the erosion of the lining.

Atmosphere: Its chemical resistance is very sensitive to the atmosphere. As in a reducing atmosphere, the resistance of aluminum silicate refractory products to the corrosion of iron oxide-containing slag is significantly reduced.

Physical And Chemical Indicators