The refractory fire brick is an inorganic non -metal material with a fire resistance of not less than 1580 ° C for Wholesale Hard Firebrick. It is the basic material to serve high -temperature technology. It is a structural material for thermal equipment such as masonry kiln. Functional materials. The successful use of refractory bricks under high temperature must have good organizational structure, thermal performance, mechanical performance and use performance, that is, high refractory, load softening temperature, heat shocks, and anti -chemical erosion. Undertake various physical and chemical changes and mechanical effects, and meet the requirements of the use of heat workers and components.
The reasons for high temperature resistance to high temperature are as follows：
1. A raw material analysis
The raw materials used for refractory fire brick manufacturing for Wholesale Hard Firebrick are generally natural ore, such as aluminum alum, silica, and magnesium ore. Three types of refractory fire bricks.
When an aluminum silicon -resistant brick produced by aluminum alum soil as raw materials, its main ingredient is alumina. It is a hydraulic aluminum aluminum. It is a kind of earth -shaped mineral, which is insoluble in water. Solution. It is mainly used for aluminum and refractory materials for Wholesale Hard Firebrick, because the refractory degree of high aluminum alumic soil clinker is as high as 1780 ° C, and has strong chemical stability and good physical properties. The production of aluminum soil through high temperature is purified and produced an aluminum content of more than 90%.
The main ingredients of silicon fire -resistant bricks for Wholesale Hard Firebrick are SiO2, the higher the content of SIO2, the higher the fire resistance. The most harmful impurities are Al2O3, K2O, NA2O, etc. The production of silicon bricks is based on natural silica, plus an appropriate amount of mineralizer to promote the transformation of the quartz in the body into the body and Syllap. In the restore atmosphere, it was slowly burned through 1350 ~ 1430 ℃. Has a high high temperature intensity. The load softening temperature is 1620 ° C.
Magnesium is the main raw material for making magnesium bricks. The basic component is MGO, and magnesium oxide has high refractory insulation performance. After high temperature burning above 1000 ° C, it can be transformed into a crystal, and it can be sintering magnesium sand to 1500-2000 ° C. After being broken to a certain particle size or powder, it can be made into a magnesium brick or magnesium. The alkaline refractory brick for Wholesale Hard Firebrick has a strong resistance to the alkaline slag, but it cannot resist the erosion of acid slag. The refractory resistance is above 2000 ° C, but its load softening point is only 1500 ° C, and the heat earthquake is stable.
2. Belong to inorganic non -metal materials
Inorganic non -metal materials and organic polymer materials and metal materials are tied as three major materials. The characteristics of ordinary inorganic non -metal materials are: high pressure resistance, high hardness, high temperature resistance, corrosion resistance, in addition In terms of anti -thermal insulation performance, it has its excellent characteristics. These are not comparable to metal materials and polymer materials. But compared with metal materials, it has low anti -anti -aggressive strength and lack of ductility. Compared with polymer materials, the density manufacturing process is complicated.
3. Molding and sintering
The production process of refractory bricks for Wholesale Hard Firebrick is the process of making a product of high-temperature resistance through mineral crushing-raw materials mixed-mechanism-high-temperature firing process. Among them, the sintering temperature of the body through the high-temperature tunnel kiln will be higher than that of its product. Softening temperature, generally sintering temperature is above 1500 ° C. The fire resistance is above 1770 ° C. High temperature is better. The fire -resistant brick for Wholesale Hard Firebrick is mainly used in the lining of kiln lining such as steelmaking electric furnaces, glass furnaces, and cement turning furnaces.
In summary, the three reasons that can resist high temperature resistance to high temperature resistance are mainly based on. ① The fire resistance of the raw materials used in the refractory bricks is high; The kiln passes through the high temperature temperature above 1500 ° C, so the refractory bricks can resist high temperature and suitable for high -temperature kiln lining.
