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: 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: The introduction of silica brick: An acid refractory consisting mainly of quartz and square quartz and a small amount of residual quartz and glass.More than 94% silica content. True density 2.35g/cm3. With acid resistance, slag erosion performance. Higher high temperature strength. The softening start temperature is 1620~1670 degrees. Long term use at high temperature without deformation. The thermal shock resistance is low (the heat exchange in water is 1~4 times). The natural silica is used as the raw material, and a proper amount of mineralizer is used to promote the transformation of quartz into quartz in the body. Slowly sintered at 1350~1430 DEG C in the reducing atmosphere. When heating up to 1450 degrees, the total volume of 1.5~2.2% expands, and the residual expansion can close the kerf and ensure the airtight and structural strength of the masonry.

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

Q: Glass kiln brick for physical and chemical indicators?: Glass kiln with high quality silica brick products according to the standard JC/T615-1996, the single brick is divided into 3 grades: XBG-96, ZBG-96, DBG-96.

Q: Can not use it two brick: Acidic silica brick refractory material, has good ability in acid slag erosion

Q: Common bond brick?: Manufacturing for silica brick binder hi-li sulfate pulp waste liquid and lime milk. When lime milk is used as a bond, it acts as a plasticizer. To increase the strength of lime brick in the drying process, as mineralizer in the firing, promote the transformation of quartz.

Q: How to improve the thermal conductivity of the coke silicabrick rate?: To improve the thermal conductivity of silica brick for coke oven rate method:Manufacture of high density and high thermal conductivity of silica brick, adding additives such as CuO, Cu2O, TiO2, Fe2O3, (FeO), can improve the thermal conductivity of silica brick.

Q: Brick: The silica mineral phase is mainly composed of tridymite and cristobalite, there is a small amount of quartz and glass. Tridymite and cristobalite and quartz remaining at low temperature due to phase change, volume changes greatly, so the brick thermal stability at low temperature is very poor. In use, under 800 degrees Celsius, slowly heating and cooling, so as not to produce cracks. The use of temperature in blast furnace so should not be below 800 DEG on.

Q: The chemical composition of silica brick and its physicochemical index?: Brick refers to the refractory products in more than 93% of the content of SiO2

Q: Physical solid waste disposal: Preparation of silica brick pug, a certain amount of waste silica brick used to add ingredients, for the purpose of expansion and stress reduction products when firing, reduce cracks, improve the rate of finished products.

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