High Alumina Refractory Brick Ladle Products for Steel Industry
The Description:
High aluminum brick from aluminum oxide (Al2O3) content is divided into the following: corundum brick: aluminum content is not less than 90%; Ladle high aluminum brick: aluminum content is not less than 85%; Grade 1 high aluminum brick: aluminum content is not less than 75%; Secondary high aluminum brick: aluminum content is not less than 65%; Three high aluminum brick: aluminum content is not less than 55%. Due to the strict refractoriness requirements of steelmaking, the aluminum content of special ladle high aluminum bricks used for ladle walls is more than that of other high aluminum bricks.
Special high aluminum brick for ladle wall is made of special high bauxite clinker as raw material, according to a certain ratio of high pressure molding made of fired products, products have strong resistance to spalling, and have resistance to potassium, sodium, sulfur, and salt erosion, low thermal conductivity and other properties, is the ideal material for cement kiln transition zone and decomposition zone, the product is characterized by good heat resistance and shock resistance. Strong ability to adapt to the environment. It is mostly used in rotary pre-heat or decomposition furnace and grate cooling machine.
Ladle is a very important equipment in the steelmaking process, especially the modern industry has higher and higher requirements for the quality of steel, and the demand for low-carbon, ultra-low carbon and other pure steel is increasing, and the converter steelmaking often cannot meet these requirements, which requires refining outside the furnace to reduce the carbon content and other impurities in the liquid steel, so the ladle requirements are getting higher and higher; The traditional ladle refractory material either can not meet the requirements of use, or the life is very low, there is no cost competitive advantage. Therefore, the development of high efficiency and longevity of ladle high aluminum brick is the inevitable trend of development.
The Physcial and Chemcial Index of High Alumina Refractory Brick Ladle Products for Steel Industry
| Item |
Zircon Mullite Brick |
Corundum Andalusite |
High Strength Abrasive Brick |
Fireclay Brick |
| AP-20 |
70-s |
CR-60P |
H-3 |
| Al2O3 % |
46 |
70 |
70 |
45 |
| ZrO2 ≤ |
20 |
--- |
--- |
--- |
| Fe2O3 ≤ |
0.5 |
1.5 |
1.5 |
2.0 |
| Apparent porosity % ≤ |
19 |
20 |
19 |
24 |
| Density kg/m3 |
3.15 |
2.6 |
2.6 |
2.15 |
| CCS Mpa |
140 |
70 |
100 |
40 |
| RUL ºC ≥ |
1600 |
1560 |
1540 |
1420 |
| Wear resistrance cm3 |
4 |
--- |
--- |
--- |
The Character:
(1) Refractoriness:
The refractoriness of high alumina brick is higher than that of clay brick and semi-silicon brick, up to 17501790ºC, which belongs to senior refractory materials. The refractoriness is mainly affected by the Al2O3 content and the type and quantity, and the refractoriness is improved with the increase of the Al2O3 content.
(2) Refractoriness under load
Because of high Al2O3 in high aluminum products, less impurity mass, the formation of less fusible glass, so the load softening temperature is higher than clay brick, but because mullite crystals did not form a network organization, so the load softening temperature is still not high silicon brick.
(3) Thermal conductivity
High alumina brick has better thermal conductivity than clay brick. The reason is that there are fewer glass with very low thermal conductivity in high aluminum products, and the number of mullite and corydalite crystals with good thermal conductivity increases, which improves the thermal conductivity of products.
(4) Thermal shock resistance stability
The thermal shock resistance of high alumina brick is between clay and silicon products. 850ºC water cooling cycle is only 35 times. This is mainly due to the fact that the thermal expansion of corundum is higher than that of mullite and there is no crystal transformation. At present, the thermal shock stability of products can be improved by improving the particle structure of products, reducing the content of fine powder and increasing the critical particle size and particle composition of clinker.
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
){kind=link}
){kind=link}