Si3N4 Bonded Refractory Brick for Iron&Steel Industry
The Description:
Si3N4 Bonded Refractory Brick for Iron&Steel Industry (silicon nitride bonded silicon carbide brick) refers to the use of SiC and Si as raw materials, by nitriding fired refractory products. The product, which first appeared in the late 1960s, is characterized by Si3N4 as a binder. Si3N4 exists between SiC grains in acicular or fibrous crystals and is an important new refractory material. Generally containing silicon carbide 70% ~ 75%, silicon nitride 18% ~ 25%. With good corrosion resistance, 1400ºC bending strength of 50 ~ 55MPa, apparent porosity of 15%. Thermal expansion coefficient (4.5 ~ 5.0)×10-2ºC-1. It was prepared by high temperature sintering method. Mainly used in blast furnace tuyere, aluminum electrolytic cell lining and so on.
The Physical and Chemical Index of Nitride Bonded Refractory Brick for Iron&Steel Industry
| Items |
Electrolytic aluminum |
Iron&steel |
Ceramic |
General industry |
| L-DGT |
T-DGT |
T-SLT |
T-SLTG |
Y-DGT |
Y-DWT |
Z-SWT |
| Apparent porosity % ≤ |
17 |
17 |
16 |
15 |
18 |
18 |
20 |
| B.D g/cm3 ≥ |
2.65 |
2.65 |
2.65 |
3.15 |
2.6 |
2.6 |
2.55 |
| Cold crushing strength Mpa ≥ |
150 |
160 |
150 |
130 |
120 |
120 |
100 |
| MOR Mpa |
40 |
45 |
-- |
-- |
40 |
40 |
35 |
| SIC% ≥ |
72 |
72 |
72 |
-- |
70 |
70 |
70 |
| SiN4 ≥ |
18 |
20 |
-- |
-- |
20 |
-- |
-- |
| Al2O3 % ≥ |
-- |
-- |
5.0 |
80 |
-- |
-- |
-- |
| Fe2O3 % ≤ |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
0.7 |
The Performance:
It has good alkali corrosion resistance, melt cryolite wettability, oxidation resistance, wear resistance, high thermal conductivity, thermal shock resistance and very low electrical conductivity.
Application:
Nitride Bonded Refractory Brick for Iron&Steel Industry used for lining non-ferrous metal smelting;calcining-endure board,and sagger of industrial ceramics;muffle boot of furnace;lining and ignitor of CFBB;lining of garbage incinerators,etc.
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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