Why Do Refractory Bricks Stove Have The Property Of Refractory Resistance?

By Author: yang huimin
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Refractory bricks stove are inorganic non-metallic materials with a refractoriness of not less than 1580°C. They are the basic materials for high-temperature technology, the structural materials for thermal equipment such as masonry kilns, and for the manufacture of certain high-temperature containers and components or for special functions. Functional Materials. The successful use of refractory bricks stove under the action of high temperature must have good organizational structure, thermal properties, mechanical properties and performance, that is, high refractoriness, softening temperature under load, thermal shock resistance and chemical corrosion resistance. It can withstand various physical and chemical changes and meet the requirements of thermal equipment and components.
Why are refractory bricks stove resistant to high temperatures? Why can't other materials withstand high temperatures? What raw material is it made from. Our company Henan Hongtai Refractory Co., Ltd. will explain to you three reasons for the high temperature resistance of refractory bricks stove.

One from raw material analysis
The ...
... raw materials used in the production of refractory bricks stove are generally natural ores, such as bauxite, silica, magnesite and other raw materials processed into refractory bricks stove with different properties, such as aluminum-silicon-based refractory bricks stove, siliceous There are three types of refractory bricks stove.
When using bauxite as raw material to produce aluminum-silicon refractory bricks stove, its main component is alumina, which is hydrated alumina containing impurities. It is an earthy mineral, insoluble in water, and soluble in sulfuric acid and sodium hydroxide solution. The main purpose is for aluminum smelting and making refractory materials, because the refractoriness of high alumina bauxite clinker is as high as 1780 ℃, with strong chemical stability and good physical properties. Ultra-high temperature refractory brick fused zirconium corundum brick can be produced by purifying bauxite at high temperature to produce a corundum main crystal phase with alumina content greater than 90%.

The raw material for making siliceous refractory bricks stove is silica, and the main component is SiO2. The higher the content, the higher the refractoriness. The most harmful impurities are AL2O3, K2O, Na2o, etc. The production of silica brick is made of natural silica as raw material, plus an appropriate amount of mineralizer to promote the transformation of quartz in the green body into tridymite. It is slowly fired at 1350~1430℃ in a reducing atmosphere. Has high high temperature strength. The softening temperature under load is 1620℃.

Magnesite is the main raw material for making magnesia refractory bricks stove. Its basic component is MgO, and magnesia has high refractory insulation properties. It can be converted into crystals by burning at a high temperature above 1000 °C, and it can be sintered magnesia when it rises to 1500-2000 °C. After being crushed to a certain particle size or powder, it can be made into magnesia brick or magnesia ramming material. Alkaline refractory bricks stove have strong resistance to alkaline slag, but cannot resist the erosion of acid slag. The refractoriness is above 2000 °C, but its softening point under load is only 1500 °C, and the thermal shock stability is poor.

Two are inorganic non-metallic materials
Inorganic non-metallic materials, organic polymer materials and metal materials are listed as the three major materials. The characteristics of ordinary inorganic metal-based materials are: high compressive strength, high hardness, high temperature resistance, corrosion resistance, and ceramics in corrosion resistance, refractory materials in It has excellent characteristics in heat and heat insulation performance, which are incomparable to metal materials and polymer materials. However, compared with metal materials, it has low breaking strength and lacks ductility. Compared with polymer materials, the density is larger and the manufacturing process is complicated.