Casting Corundum Refractory Brick for Glass Furnace
The Description:
Corundum refractory brick is referred to as corundum brick, which is an aluminum-silicon refractory product with corundum as the main crystalline phase. Corundum brick has excellent high temperature mechanical properties, good erosion resistance and wear resistance.Corundum brick is divided into fused cast corundum brick, electric fused corundum refired brick, sintered corundum brick 3 kinds. Fused cast corundum brick is the industrial alumina and a small amount of soda ash and quartz powder in the arc furnace melting, then casting, annealing and other processes, and finally mechanical processing into the required shape and size. Fused corundum resintered brick is made of crushed fused corundum particles and fine powder, adding a small amount of clay and bonding agent, after full mixing and forming by brick press. Brick density 2.75~2.85g/cm3. The brick is baked at 1700~1800ºC.Corundum brick has a series of excellent properties, high mechanical strength, high hardness. In addition, it also has good wear resistance, oxidation resistance, corrosion resistance and electrical insulation properties.Corundum porous plug in the furnace refining such as VAD /VOD furnace application, can continuously blow argon 60~90min, molten steel temperature in 1700 ~1800ºC, service life is 1~4 times, the average corrosion rate is 8~13mm/ furnace times. Low silicon corundum brick is used in the second stage of the petrochemical ammonia reconversion furnace, which can be used all the year round under high temperature and high pressure strong reduction atmosphere above 1700ºC. The use of corundum large brick in the discharge tank of glass industry high-temperature tank kiln can extend the life. Burn in high temperature tunnel kilns into belts or in inverted flame kilns. Shuttle kiln can use more than 95% of A12O3 corundum brick as lining or combustion chamber lining. For the quality requirements of corundum bricks, from the analysis of key factors leading to damage, first of all, the SiO2 content in corundum products should be reduced, followed by good process measures to ensure a low high temperature creep rate. Whether corundum or mullite, its resistance to alkali vapor or alkali condensate erosion is not ideal. As long as there is a small amount of SiO2, 600~900ºC will form B-A1203, causing 6%~20% volume expansion and resulting in material damage.Corundum brick is made of pure fused white corundum, synthetic mullite, chromium oxide, etc., which is formed and sintered at high temperature. The product has dense structure, high compressive strength, high temperature resistance (21790ºC), good thermal shock stability, acid and alkaline gas erosion resistance, and is not affected by H2, CO and other reducing gases. High purity corundum products are widely used in oil or gas gasifier, ethylene gas furnace, ammonia decomposition furnace, carbon black reactor in chemical industry, high temperature kiln in refractory and ceramic industry; Chrome corundum products are used in the petrochemical industry of coal water slurry and petroleum coke pressurized gasifier backing, oil or gasifier work lining, chemical industry of carbon black reactor lining, refractory industry of high temperature furnace lining; Mullite corundum products are widely used in carbon black reactor, refractory materials, ceramics, electronics industry of high temperature furnace lining.
1.The Physical and Chemcial Index of Casting Corundum Refractory Brick for Glass Furnace
| Item |
Unit |
CMC |
Corundum brick |
Chrome corundum brick |
Titanium corundum brick |
| C90 |
C95 |
C99 |
CC10 |
TC |
| Pressing |
Casting |
Pressing |
Casting |
Pressing |
Casting |
| Al2O3 % ≤ |
% |
85 |
90 |
90 |
95 |
95 |
99 |
99 |
86 |
94 |
| Fe2O3 ≤ |
% |
0.5 |
0.4 |
0.4 |
0.3 |
0.3 |
0.1 |
0.1 |
0.2 |
0.2 |
| Cr2O3 ≥ |
|
|
|
|
|
|
|
|
10 |
10 |
| Apparent porosity % ≤ |
% |
18 |
16 |
18 |
16 |
18 |
16 |
18 |
16 |
2 |
| BD |
g/cm3 |
2.8 |
3.1 |
3.05 |
3.15 |
3.1 |
3.2 |
3.15 |
3.3 |
3.6 |
| CCS |
Mpa |
60 |
100 |
90 |
100 |
90 |
100 |
90 |
200 |
300 |
| 0.2Mpa RUL ºC ≥ |
|
1650 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
1700 |
| PLC 1500ºC*2h |
ºC |
±0.1 |
±0.1 |
±0.1 |
±0.1 |
-- |
-- |
-- |
-- |
-- |
Product feature:
Casting Corundum Refractory Brick for Glass Furnace is made from special grade of bauxite as main raw material,added with amount of white fused alumina and a alumina powder,shaped by high pressure and sintered at high temperature.The main mineral constituent includes mullite and corundum,with excellent high temperature physical performance and chemical erosion resistance.
Company main products and profile:
Why choose us?
Zhengzhou Kaiyuan Refractories Co., Ltd is a manufacturer of silicon-aluminum refractory (fireclay brick, high alumina brick, silica brick, mullite brick, corundum brick, insulation brick, castable, mortar) for coke oven, blast furnace, hot blast stove, heating furnace, anode baking furnace, boilers and other industrial furnaces for 20 years located in Henan, China.
Our total annual production capacity is about 100,000 tons of dense-shaped refractory product, and 100,000 tons of monolithic refractory product.
We have three tunnel kilns for silicon-aluminum dense bricks and one new plant for the monolithic refractory.
We're sure our custom-made products and professional services will bring you a stable quality supply and more profit.
Our Laboratory and R&D Center
We have test equipment for the following items:
chemical %
bulk density
apparent porosity
cold crushing strength
modulus of rupture
refractoriness under load
creep
thermal expansion
Reheat linear change
thermal shock resistance
thermal conductivity
Contract Kiln Construction
FAQ
1. Are you a Manufacturer or trader?
A: We are manufacturer and our plant is located in Xinmi city, Henan, China
2. Can we visit your company?
A: You are warmly welcome to visit our company at anytime, you'll not regret of the visiting.
3. Do you accept OEM?
A: Yes, we do OEM.
4. What's the MOQ of trial order?
A: We care about all the potential customers and take all the trails orders.
5. What is the payment term?
A: TT, LC, DP, DA.
6. How long is the delivery time?
A: Usually within 35 days after down payment.
7. Do you accept third party inspection ?
A: Yes for sure, we accept the third party inspection before delivery.
8. What is your after-sell service?
A: The rejected goods can be replaced or we can make compensation for it. We can send technical engineers to the end user for technical issue.
9.What is your company's certification?
A: ISO9001 certificate
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