Andalusite Refractory Brick for Cupola Furnace
The Description:
Cupola, also known as cupola or foundry furnace, is mainly a high-temperature equipment for iron smelting, its original working temperature is generally 1400-1600 degrees, the cupola furnace body is composed of the bottom of the furnace, the furnace body, the front furnace and bridge parts. The masonry of a cupola is subjected to the load of molten iron and material column, and the mechanical wear effect during cutting. The erosion of molten iron and slag and the rapid change of temperature during the opening and closing of wind, therefore, the cupola lining should be made of refractory clay brick with good quality.
Cupola with clay brick as the lining is the most commonly used firebrick, clay brick Al2O3 content of about 30%-48%, to refractory clay or kaolin and clay clinker and combined with clay, semi-dry or plastic molding, roasting at 1250-1420ºC temperature, belongs to the weak acid refractory material, clay brick due to low cost of refractory raw materials, The produced clay brick is economical and practical.
Technical Index:
| Items |
Special andalusite brick |
| Al2O3 % ≥ |
55-60 |
| Fe2O3 % ≤ |
1.2 |
| B.D g/cm3 ≥ |
2.25 |
| Refractoriness ºC ≥ |
1790 |
| RUL ºC ≥ |
1600 |
| % P.L.C 1550ºC×2h |
-0.2 |
| Apparent porosity % ≤ |
18 |
| Creep%(0.2Mpa*50h) |
0.2 |
Product feature:
The refractoriness of clay bricks is similar to that of silicon bricks, up to 1690~1730 ° C, but the load softening temperature is more than 200 ° C lower than that of silicon bricks. Because in addition to containing high refractories of mullite crystals, clay bricks also contain nearly half of the low melting point amorphous glass phase.
In the temperature range of 0~1000ºC, the volume of clay brick expands evenly with the increase of temperature, and the linear expansion curve is approximately a straight line, and the linear expansion rate is 0.6%~0.7%, only about half of the silicon brick. When the temperature reaches 1200ºC and then continues to warm up, its volume will start to shrink from the maximum expansion. The residual shrinkage of clay bricks leads to the cracking of masonry joints, which is a major shortcoming of clay bricks. When the temperature exceeds 1200 ° C, the low melting point in the clay brick gradually melts, and the particles are very tight together due to the surface tension, resulting in volume contraction.
The 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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