Silica Brick for Coke Oven and Carbon Calciner

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Specifications

Item brand
Bottom and other part
Wall brick brick
Sio2% >= 94
0. 2mpa rul c >= 1650
Linear c

Item	 brandBottom and other partWall brick brickSio2% >=	 940. 2mpa rul c >=	 1650Linear changeAfter re-heating% 1450c x2h <=	 0 /  + 0. 2A. p. % <=	 22	 24C. C. S. mpa >= 30	 25B. D. g / ccm >= 2. 34	 2. 35ThermalDilatation% 1000c <= 1. 28	 1. 30

Performance
Item
Unit 95 Al2O3 96 Al2O3 99 Al2O3
Physical Characteristics Bulk density g/cm3 3.6 3.6 3.9
Water absorption % 0 0 0
Mechanical Characteristics Flexural strength Mpa 320 340 360
Hardness Vickers Gpa 12.2 13.5 15.6
Elastic modulus Gpa 280 320 370
Poisson’s ratio - 0.22 0.23 0.23
Thermal Characteristics Linear expansion coefficient (200C-5000C) 10-6/0C 7.1 7.2 8
Thermal conductivity w/(m.k) 16 24 32
Specific Heat 10-3J/(kgK) 0.78 0.78 0.9
Electrical Characteristics Dielectric constant (1MHZ) - 9 9.4 9.9
Dielectric loss angle 10-4 15 5 1
Dielectric strength 106V/m 12 15 15
Processing technology
Process range (mm)
Outside Diameter 1---300
Inside Diameter 0.5---300
Length 0.5---1200
Accuracy of working (mm)
Perpendicularity 0.01
Concentricity 0.01
Roundness 0.005
Straightness 0.005
Parallelism 0.01
Planeness 0.005
Roughness 0.05
Fit clearance 0.005

Silica Brick For Coke Oven And Carbon Calciner

Q: Physical solid waste disposal: Too much addition will reduce the refractory and mechanical strength, increase porosity, so the amount of waste brick should not be too much.

Q: Why is the new trend of the high thermal conductivity of silica brick: The high thermal conductivity of silica brick all inherits the advantages of traditional coke oven silica brick, on the basis of further highlight the characteristics of high thermal conductivity.

Q: How much is the highest melting point of silicon?: Mainly used for partition, carbonization chamber of coke oven and combustion chamber open hearth furnace regenerator and a sediment chamber, soaking furnace, glass melting furnace refractories and ceramic kiln, kiln vault and other load-bearing parts. Also used for high temperature bearing part of hot blast stove and acid open hearth furnace

Q: Semisilica brick, clay brick, high alumina brick and what is the difference?: This is a kind of refractory material is divided into three types: semisilica brick (A12O315 ~ 30%), clay brick (A12O330 ~ 48%), high aluminum brick (A12O3>48%).

Q: Which material is good for furnace refractory?: Neutral refractory is mainly composed of alumina, chromium oxide or carbon. Corundum products containing more than 95% of alumina are a kind of high quality refractory materials with a wide range of uses. Chrome brick with chromium oxide as its main component has good corrosion resistance, but its thermal shock resistance is poor, and its deformation temperature is lower at high temperature. Carbon refractories with carbon bricks, graphite and silicon carbide products, low coefficient of thermal expansion, high thermal conductivity, good thermal shock resistance, high strength, resistance to acid and salt corrosion, especially weak acid has good resistance, without wetting of the metal and slag, light. It is widely used as lining material of high temperature, and also used as lining of autoclave in petroleum and chemical industry.

Q: What role does silica play in refractories?: Low fractory refers to the alumina content between 10%~30%, SiO2 content is less than 85%, semisilica brick SiO2 = 65%,The SiO2 content of not less than 93%, refractory material to natural quartz rock as the main raw materials are called silica, silica brick, silica brick, quartz glass and special products. China's literature generally put this type of product is called "siliceous refractory products", which is the most important brick.

Q: The high thermal conductivity of silica brick and traditional brick what is the difference?: Tridymite content high thermal conductivity silica brick is 70%, tridymite content of traditional brick is 60%, tridymite content high thermal conductivity of silica brick than tridymite high content of 10% traditional brick,

Q: What are the main constituents of refractory bricks?: Refractory brick composition is mainly composed of a variety of aggregate or aggregate and one or more kinds of sticky agent composed of mixed powder particles, when used, must be mixed with one or more liquids, mixing evenly, with strong liquidity. Different refractory bricks are different, such as silicon, aluminum, clay and so on:

Q: Why is the highest brick coke oven temperature measuring point temperature not exceeding 1450: That is because the brick load softening point the maximum temperature is 1450 degrees.

Q: Such purpose and scope please give me detailed points thank you: Acid refractory brick is mainly composed of tridymite and cristobalite and quartz and a small amount of residual glass phase.

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