Silica Brick for Hot Blast Stove/Furnace

Silica Brick for Hot Blast Stove/Furnace

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 10 m.t.

Supply Capability:: 100000 m.t./month

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General Information
Modern hot stoves hot blast average temperature is up to 1,250 ℃- 1,300 ℃, so there are higher requirements on refractories quality, like checker chamber upper area, combustion chamber where are key areas for stoves campaign life. Therefore, some clients and experts have proposed the goal that campaign life of hot stoves should be twice as much as the life of blast furnace. Obviously, this is a challenge to refractories quality. It has become an important task for the refractory industry to select one kind of refractory with good thermal stability, high resistance to high temperature compression creep, high refractoriness under load and reasonable price to use in the hot stove with high blast temperature. The excellent performance silica brick has the following characteristics. The low creep, high refractories under load and low residual quartz contents, silicon bricks for hot stove of our company has been successfully applied to various types of hot stoves of major steel companies at home and abroad and the quality has been recognized by the clients.

Feature
Superior resistance to acids (including oxidizing)
Resistance to chlorine
Resistance to thermal shock and pressure changes
Low thermal and chemical expansion

Technical Data

Brand Item	CGZ-95	CRG-95		CJG-94
Brand Item	CGZ-95	Dome & Wall brick	Checker	Sole & wall brick	Others
Refractoriness º C ≥	1710
Permanent liner change 1450 º C × 2h %				+0.2 0
Apparent Porosity (%) ≤	22	22	23	22	24
True Density (g/cm3) ≤	2.37	2.35	2.35	2.34	2.35
Cold Crush Strength (MPa) ≥	29.4	35	30	30	25
Thermal Expansion(1000 º C ) %		1.26	1.26	1.28	1.30
Refractoriness under Load 0.2MPa Ta( º C ) ≥	1650			1650	1650
Chemical analysis SiO 2 % ≥	95	95	95	94	94

Photos for Applications

Silicon Brick for Hot Blast Stove/Furnance

Q: Common bond brick?: When adding ingredients, the amount of lime added shall be converted to CaO, and the amount of addition varies depending on the product, usually fluctuating at 1.5~2.5%. For example, the production of coke oven silica brick, the dosage of CaO is 2.0~3.0%; the production of electric furnace top brick, the dosage of CaO is 1.4~1.75%.

Q: Why will expand when heated brick: In the process of SiO2 drying, the four crystalline transformation points of 117, 163, 180~270 and 573 DEG C are found, among which the volume expansion caused by the 180~270 is the largest.

Q: What role does silica play in refractories?: The production of clay brick refractory clay raw material is natural, its main mineral is kaolinite (formula Al2O3 - 2SiO2 - 2H2O), clay brick containing SiO2 in 45% ~ 65%, belongs to the weak acid refractory materials, have a certain ability to resist acid slag, but easy to be alkaline slag erosion.

Q: How to judge the quality of brick, clay brick, high alumina brick furnace from the appearance?: Mainly from the impurities to determine how much, generally less impurity single color brick.

Q: Can iron oxide be used as refractory material?: Is widely used in this area. Mentioned refractory material of high school textbooks generally refers to three two aluminum oxide (alumina), alumina is also used as a refractory material, refractory crucible, porcelain, artificial gemstones.

Q: The high thermal conductivity of silica brick and traditional brick what is the difference?: Brick, high thermal conductivity has been greatly improved in terms of morphology, crystal structure, physicochemical index. The structure and morphology of high thermal conductivity of silica brick,Structure and morphology of high thermal conductivity and the traditional brick brick magnified 20 times were compared, high thermal conductivity silica pore size distribution is more uniform and finer.

Q: Why is the three oxidation of two silicon is very harmful impurities in silica brick: Heating calcination is the best way to extend this sort of impurity removal. Remove impurities

Q: Common bond brick?: When adding ingredients, the amount of lime added shall be converted to CaO, and the amount of addition varies depending on the product, usually fluctuating at 1.5~2.5%. For example, the production of coke oven silica brick, the dosage of CaO is 2.0~3.0%; the production of electric furnace top brick, the dosage of CaO is 1.4~1.75%.

Q: What is the silica refractory products?: Refractory brick with silica content greater than 90%.

Q: Such purpose and scope please give me detailed points thank you: Mainly used for coke oven carbonization chamber and the combustion chamber wall, open hearth furnace regenerator and a sediment chamber, soaking furnace, glass furnace, refractory materials and ceramic brick kiln, kiln vault and other load-bearing parts. Also used for high temperature bearing part of hot blast stove and acid open hearth furnace.

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