Industry news
The composition of thermal insulation refractories
Insulation refractory material refers to refractory material with high porosity, low bulk density and low thermal conductivity, also known as lightweight refractory material. Including thermal insulation refractories, refractory fibers and refractory fiber products.
22
2021
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09
A brief introduction to high alumina bricks
Aluminum silicate refractory products with aluminum oxide (Al2O3) content higher than 48%. A neutral refractory with an alumina content of more than 48%. It is formed and calcined from bauxite or other raw materials with high alumina content.
22
2021
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09
How many molding methods are there for refractory castables?
The molding methods of refractory castables are: vibration molding, ramming molding, plastic molding, grouting molding, hot pressing molding.
22
2021
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09
Ordinary clay brick: a general term for clay refractories with regular shapes. The main chemical components are alumina and silica, and also contain ferric oxide, calcium oxide, potassium oxide, sodium oxide, titanium dioxide, etc. that act as fluxes. It is divided into ordinary clay bricks, multi-clinker clay bricks, all raw clay bricks, high siliceous clay bricks, etc. It has the characteristics of good high temperature performance and good thermal shock resistance. It uses hard clay clinker (all raw clay bricks as raw material) as raw material, adds an appropriate amount of plastic clay, and is plastically molded or semi-dry molded, and then sintered. made.
22
2021
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09
What are the 5 most common classifications of refractory materials?
At present, the common classification method of refractory materials is chemical composition classification, which can be divided into refractory materials such as silica, aluminosilicate, magnesia, dolomite and carbon composite.
22
2021
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09
How many kinds of unshaped refractory materials are used for hot blast stove?
The mud of refractory bricks for masonry hot blast stove can refer to the mud of refractory bricks for masonry furnace. In addition, a large number of silica bricks are used in the high-temperature parts of the hot blast stove, and siliceous refractory mud is required to build silica bricks. The siliceous refractory mud uses silica powder or some silica powder as the main material, and the binder can be soft clay or chemical binder.
22
2021
/
09
3 bonding methods of refractory materials: direct bonding, chemical bonding, ceramic bonding
The chemical composition of the refractory material refers to the compound that constitutes the refractory material, also known as chemical composition. Generally speaking, different refractory materials have different chemical compositions, and each refractory material can be divided into two parts according to the content of each component, one part is the basic component that accounts for the majority, and the other part is the impurity component that accounts for a small amount. In refractory materials, the components that usually need to be measured are Al2O3, SiO2, Fe2O3, CaO, MgO, TiO, Na0, KO, etc. For carbon-containing refractories and silicon carbide refractories, carbon and silicon carbide are also important chemical compositions.
22
2021
/
09
After a blast furnace has been used for a period of time, due to thermal shock, erosion, wear and oxidative peeling in the furnace, the refractory layer in the furnace will be thinned, and the furnace shell will appear red, causing the furnace shape to change and affecting the gas and heat in the furnace. , the reasonable distribution of materials, and then affect the blast furnace production. Regular repair of blast furnace inner lining is of great significance for improving blast furnace operation, maintaining furnace conditions and prolonging blast furnace life.
15
2021
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09
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