Al2O3-MGO Periclase-Spinel Refractory Brick for Melting Nickel-cobalt
The Description:
Aluminum-magnesium spinel (magnesia-alumina spinel) refers to magnesium oxide and trialumina as raw materials, by artificial synthesis of spinel refractory raw materials. The raw material is rarely found in nature, and the industrial magnesia-aluminum spinel is all synthetic. Bauxite based sintered magnesia alumina spinel is made of high quality bauxite with Al2O3 content of more than 76% and high quality light burnt magnesia powder with MgO content of more than 95%, after multi-stage homogenization process, sintered at high temperature above 1800°C in ultra-high temperature tunnel kiln.
The Phycial and Chemical Index of AL2O3-MgO Periclase-spinel Refractory Brick
| Item |
KYMA-85A |
KYMA-85B |
KYMA-85C |
| MgO % ≤ |
85 |
80 |
80 |
| Fe2O3 % ≤ |
1 |
1.2 |
1.2 |
| Al2O3 % |
9-13 |
9-13 |
9-13 |
| SiO2 ≤ |
1.5 |
2.0 |
2.5 |
| Apparent porosity % ≤ |
18 |
18 |
19 |
| Density kg/m3 |
2.93 |
2.92 |
2.9 |
| CCS Mpa |
60 |
60 |
50 |
| RUL ºC ≥ |
1700 |
1650 |
1600 |
| Thermal shock resistance1100ºC water cycle |
100 |
80 |
80 |
Performance characteristics of magnesia alumina spinel brick:
Good thermal shock stability. It can withstand water cooling 20 to 25 times, withstand air cooling more than 100 times, and even further away.
Low thermal stress. Because magnesia alumina spinel and cubic magnesia belong to the cubic crystal system, the thermal expansion size along the direction of each crystal axis is the same, so the expansion and contraction are relatively uniform when the temperature fluctuations.
The softening temperature under load is better than that of magnesium brick. It reaches 1650~1700ºC.
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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