High Quality Composite Mullite Refractory Brick For Carbon Furnace
The Description:
Corundum bricks are refractory products with alumina content greater than 90% and corundum as the main crystalline phase. High compressive strength at room temperature (up to 340MPa). High load softening initial temperature (greater than 1700ºC). Good chemical stability, strong resistance to acidic or alkaline slag, metal and liquid glass. The thermal shock stability is related to its structure. The corrosion resistance of dense products is good, but the thermal shock stability is poor.
Physical and Chemcial Techncal Index of High Quality Composite Mullite Refractory Brick For Carbon Furnace
| Item |
Composite mullite brick |
| MG-65 |
EN-58 |
| AL2O3%≥ |
65 |
59 |
| Fe2O3% |
1.5 |
1.5 |
| Apparent porosity% |
17 |
17 |
| B.D g/cm3 ≥ |
2.5 |
2.35 |
| C.C.S Mpa ≥ |
70 |
60 |
| Creep rate 0.2Mpa% |
0.3 |
0.3 |
| 0.2Mpa R.U.L ºCT0.6ºC |
1500 |
1500 |
Product feature:
1. corundum brick fire resistance
From the Al2O3-Cr2O3 binary phase diagram, it can be seen that Al2O3 and Cr2O3 can form continuous solid solutions, and no eutectic products are produced. Therefore, the addition of Cr2O3 to high-purity corundum materials, no matter how much is added, will not only reduce the fire resistance of the material, but improve the fire resistance of the material. The refractoriness (>1790 ºC) and load softening temperature (>1700 ºC) of chrome-corundum bricks are better than those of high-purity corundum products.
2. Strength of corundum brick
The normal temperature compressive strength of high purity corundum brick is generally 70 ~ 100MPa, and the normal temperature compressive strength of high performance chrome corundum brick is generally >150MPa, which is significantly higher than that of corundum brick. This is because the product in the firing process, between the particles and particles, between the particles and fine powder, fine powder and fine powder are formed Al2O3-Cr2O3 solid solution, the solid solution is like a bridge to the particles, fine powder connected together, so that the strength of the material is greatly improved.
3. Thermal shock stability
According to reports, adding Cr2O3 to corundum, when the content of Cr2O3 is 10% ~ 66%, the thermal shock stability of the material decreases with the increase of the content of Cr2O3, that is, the thermal shock stability of the chromium corundum brick with low content of Cr2O3 is better than that of the chromium corundum brick with high content of Cr2O3. The high performance chrome-corundum brick used in our factory has a Cr2O3 content between 12% and 20%, and its thermal shock stability is higher than that of corundum brick. In particular, the AKZ chrome-corundum brick produced by adding a small amount of phase change additive has better thermal shock stability.
4. Resistance to slag erosion
The solubility of various refractory oxides in molten cinder: Cr2O3 in coal gasification
Company main products and profiles
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
Audited Supplier 
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