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: Why will expand when heated brick: After high temperature after the formation of tridymite and cristobalite and quartz and a small amount of residual glass phase, quartz heating to 220-240 DEG C, in a certain degree of thermal expansion, brick maximum expansion occurs in 100~300 DEG C, 300 expansion before the total amount of expansion is about 70%~75%.

Q: What is the effect of the content of silicon nitride in silicon nitride bonded silicon carbide brick on the use of electrobath? Thank you: The main damage of silicon carbide side wall brick is stress damage, not chemical erosion. Chemical damage is formed prior to the formation of the groove, and the damage to the chemical erosion is little after the formation of the groove.

Q: The difference between clay refractory bricks and refractory brick in the application.: Brick bearing soft temperature and close to the melting point, high temperature strength, can be in high temperature (above 1400 degrees) under the condition of long-term use,

Q: What role does silica play in refractories?: The natural mineral of silica is called quartz. In refractories, silica and siliceous refractory materials contain more silica. Silica is acidic at high temperature, and siliceous refractory can resist acid slag corrosion

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: What are the main constituents of refractory bricks?: (a) containing refractory brick brick, refers to more than SiO293%, is the main varieties of acid resistant brick. It is mainly used for coke oven building, also used in furnaces all kinds of glass, ceramic and carbon calciner, refractory brick arches and other load-bearing parts, is also used in high temperature bearing part of hot blast stove, but should not be used in thermal equipment below 600 DEG C and the temperature fluctuation in the.

Q: Brick: Acidic silica brick refractory material, has good acid resistance and slag erosion, softening temperature is as high as 1640 to 1670 DEG C, in the long-term use volume is relatively stable under high temperature.

Q: What is the silica refractory products?: High silicon content in high temperature expansion sintering temperature between 1390-1410 in furnace arch

Q: The formula in the refractory brick, and firing curve, who knows?: By silica powder, 81-85%, perlite 15-19%, plus the total weight of the main raw materials of the following accessories

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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