Silicon Carbide Silica Brick

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Specifications

SI3N4 SIC
Stable chemical performance
High cold crushing strength
Good thermal shock stability
Good anti corrosion ability

SI3N4 bonded SIC brick.

Stable chemical performance
High cold crushing strength
Good thermal shock stability
Good anti corrosion ability

It is mainly used in the production of aluminum,copper, zinc.

It is used as the liner of molten bath or electrobath.

SI3N4 SIC brick has no corrosion with metal aluminum, and has no chemical reaction with cryolite. It is the ideal material for electrobath lining brick.

Item Brand Index	For General Purpose			Light weight silica brick
Item Brand Index	GZ-95	GZ-94	GZ-93	QG-1.2
SiO2≥	95	94	93	91
Refractoriness	1710	1710	1690	1670
RUL(0.2 MPa)T1, °C	1650	1640	1620	1560
Apparent Porosity%	≤22	≤23	≤25	≥45
Cold Crushing Strength Mpa	≥29.4	≥24.5	≥19.6	≥3.5
True Density g/cm3	≤2.37	≤2.38	≤2.39	≤2.39
Bulk Density g/cm3	≤1.20	≤1.20	≤1.20	≤1.20

Item	Data
Apparent porosity,%	≤17
Bulk density,g/cm3	≥2.6
Cold crushing strength,Mpa	≥150
Crushing strength at 1400°c,Mpa	≥43
SiC, %	≥72
Si3N4, %	≥21
Fe2O3, %	≤1.5
Anti-alkaline	Good

Silicon Carbide

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: Such purpose and scope please give me detailed points thank you because I am learning stage: 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.

Q: What is the main material of silica brickIt's common, the kind we see so often!: An acid refractory consisting mainly of quartz and square quartz and a small amount of residual quartz and glass.

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: 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: How to improve the thermal conductivity of the coke silicabrick rate?: The content of SiO2 is 98.23% crystalline silica as raw material, with sulfite pulp liquid as binder, millscale and lime as mineralizer, by Jin Hongshi (TiO2) as additive, can improve the rate of thermal conductivity of silica brick for coke oven. When the rutile content is 1.5%, the coefficient of thermal conductivity of silica brick for coke oven is 2.66W/ (m.k).

Q: The chemical composition of silica brick and its physicochemical index?: ????Al2O3 SiO2??????fe2o3??????cao???????r2o93～98?0.5～2.5?；；?0.3～2.5??0.2～2.7；??1～1.5；

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

Q: Why in the production of the brick to detect the volume density: Fast density test, please consult an instrument.

Q: The formula in the refractory brick, and firing curve, who knows?: Add 1.8-2.2% of the total weight of the main raw material, and then add lime milk, rolling for 10-15 minutes, and finally add pulp, rolling for 10-15 minutes, out of the mill, forming billet.

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