Silica Brick for Glass Furnace Application

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Specifications

1.high temp Refractoriness Under Load
2.good stability under high temp
3.low pollution
4.Refractory Silica Brick

Silica Bricks for Glass Furnace

,there are series silica bricks for glass furnace, BG-95, BG-96A, BG-96B. high purity silica for brick mading, with science material proporation and technic of products. different calcined machine, automation, short cycle of production.

Item		BG-94	BG-95	BG-96A	BG-96B
Chemical composition	SiO2	≥94	≥95	≥96	≥96
	Fe2O3	≤1.5	≤1.5	≤0.8	≤0.7
	Al2O3+TiO2+R2O		≤1.0	≤0.5	≤0.7
Refractoriness °C		1710	1710	1710	1710
Apparent Porosity%		≤22	≤21	≤22	≤22
Bulk Density g/cm3		≥1.8	≥1.8	≥1.8	≥1.8
True Density,g/cm3		≤2.38	≤2.38	≤2.34	≤2.34
Cold Crushing Strength Mpa		≥24.5	≥29.4	≥35	≥35
0.2Mpa Refractoriness Under Load T0.6 °C		≥1630	≥1650	≥1680	≥1680
Permanent Linear Change On Reheating(%)1500°CX2h		0~+0.3	0~+0.3	0~+0.3	0~+0.3
20-1000°CThermal Expansich10-6/°C		1.25	1.25	1.25	1.25
Thermal Conductivity (W/MK) 1000°C		1.74	1.74	1.44	1.44

$Glass Furnace Application Refractory Silica Brick$

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: How much is the highest melting point of silicon?: Acidic silica brick refractories, softening temperature is as high as 1640 to 1670 DEG C, in the long-term use volume is relatively stable under high temperature. More than 94% silica content.

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: 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: Can iron oxide be used as refractory material?: Iron oxide can not be used as refractory material, but it can be used as refractory additive. Iron oxide can be used as pigment

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

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: The difference between clay refractory bricks and refractory brick in the application.: Clay brick features good thermal shock resistance and low price, but high temperature performance is not well integrated, and the long-term use temperature is not higher than 1300 degrees. It is widely used in low temperature parts of various kilns.

Q: Why in the production of the brick to detect the volume density: Density is the property of material, different density of materials, density of the same kind of material is not up to standard, affecting performance.

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

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