Corundum-Mullite Brick - Corundum Mullite Ladrillos

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Corundum mullite brick technology parameters

ITEM	UNIT	Mullite brick	Resintering fused mullite bricks	Mullite - corundum brick	Corundum mullite brick
Al2O3	%	≥70	≥75	≥80	≥90
SiO2	%	≤25	≤23	≤18	≤8
Fe2O3	%	≤0.5	≤0.5	≤0.5	≤0.3
APP	%	≤17	≤14	≤19	≤18
Bulk density	g/cm	≥2.55	≥2.65	≥2.70	≥2.90

Room temperature compressive strength	MPa	≥90	≥100	≥80	≥100
Dutch soft starting point (0.2 MPa, 0.6%)	℃	≥1630	≥1700	≥1650	≥1700

Application

Glass furnace upper structure brick, feeding, cover plate, metallurgy is very warm in it industry kiln lining, carbon black reactor quench section, stay segment lining.

Glass furnace top self-closed, self-closed feet, other industrial thermal technology equipment lining brick.

Glass furnace brick of upper structure, cover plate, forming parts, temperature, carbon black in the reactor and other thermal lining device.High temperature with mullite and corundum saggar.

The upper structure of glass furnace brick, brick, cover plate, molding parts, temperature, carbon black in the reactor lining device and other thermal lining.High temperature with corundum - mullite saggar.

Q: Mullite bricks in alumina alumina is what?: Mullite (3Al2O3 - 2SiO2) high alumina refractory materials as the main crystal phase. The general alumina content in 65% ~ 75%. In addition to mineral composition of mullite, alumina containing low also contain a small amount of glass phase and cristobalite; alumina containing high also contain a small amount of corundum.

Q: What are the properties of corundum mullite?: Lightweight materials have uniform internal structure, high compressive strength, corrosion resistance, heat shock resistance, oxidation resistance, high temperature and low thermal conductivity. Dongshin refractories manufacturers manufacturers supply, price is appropriate

Q: Corrosion mechanism of iron on refractory materials: Iron oxide can not be used as refractory,

Q: Which is faster for heat transfer between corundum bricks and high alumina bricks?: There must be a difference. They vary in color from the amount of aluminum, the weight, the temperature, and the color. For example: 75 high aluminum and 43 clay bricks, 75 single weight 4.5kg or more

Q: 2000 degree of high temperature materials, which belong to high temperature insulation materials?: Magnesium compounds, ceramics, mica, corundum, silicon, graphite, titanium alloy, diamond, tungsten, silicon dioxide, silicon carbide, carbon, copper oxide, iron oxide, iron, manganese, lightweight mullite corundum brick, high aluminum brick lightweight clay brick, alumina hollow ball1) rock wool board: thermal conductivity 0.041-0.045, fire retardant, fire resistance, temperature absorption, insulation effect is poor.(2) glass wool: construction is simple, free cutting. Antibacterial, mildew proof, aging resistance, corrosion resistance, and guarantee the healthy environment. Low hygroscopicity and stable physical properties.

Q: What material is heat insulated and not afraid of fire?: Industrial production of perlite as insulation materials began in the United States in 1964Arizona, while China's expanded perlite began production in the late 60s. Expanded perlite includes perlite and pineRock and obsidian (three of which are close to the water content), due to the high temperature in 1000-1300C0, the volume of rapid expansion of 4 - 30 times, so collectively referred to as expanded perlite. Its characteristics are: low thermal conductivity, fire resistance and sound insulation performance is good, non-toxic, cheap, but have very strong water absorption, thermal conductivity due to water is much higher than that of pearlite, water will cause its insulation performance degradation, inorganic porous material, low strength, easy to break; therefore in thermal insulation applications when the need to enhance the hydrophobic and expanded perlite.

Q: What are the high temperature insulation materials?: If there is atmosphere protection, then graphite is a more powerful material. Melting point 3850 degrees Oh, almost all ultra high temperature kiln, can be protected by atmosphere, all with graphite material.

Q: What kind of refractory material is used in the hearth of reverberatory furnace?: 1400 degrees below can use clay brick, high alumina brick; 1400 to 1700 can use mullite bricks, heavy corundum brick; more than 1700 can use zirconia brick, such as zirconia brick

Q: What material is good for refractory bricks?: The mineral composition of high alumina refractory brick and high alumina refractory brick is corundum, mullite and glass phase. The raw materials are high alumina and sillimanite natural ore. They are also made of fused alumina, sintered alumina, synthetic mullite and calcined alumina in different proportions with clay. It is produced by sintering process. But the products are casting brick, brick, brick fused grain and unshaped refractory brick. High alumina refractory brick is widely used in iron and steel industry, non-ferrous metal industry and other industries.

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