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Microcrystalline Si-N-O multiphase ultrafines is the newly developed innovative product of us. It has excellent oxidation resistance, thermal shock resistance, and slag resistance, while significantly improving high-temperature flexural strength of the refractories incorporated with them. It’s suitable for a variety of unshaped and shaped refractory products, such as BF trough castables, BF taphole mud, sliding plates, silicon nitride-bonded silicon carbide bricks, etc.
Microcrystalline Si-N-O multiphase ultrafines is the newly developed innovative product of us. It has excellent oxidation resistance, thermal shock resistance, and slag resistance, while significantly improving high-temperature flexural strength of the refractories incorporated with them. It’s suitable for a variety of unshaped and shaped refractory products, such as BF trough castables, BF taphole mud, sliding plates, silicon nitride-bonded silicon carbide bricks, etc.
The recommended addition level of the ultrafines in BF trough castables is around 3%, and it can be further optimized and adjusted according to customer's formulation system. After adding this kind of additive in a BF trough castable, the following benefits have been achieved:
1. HMOR is increased by more than 40%.
2. Slag resistance index is increased by more than 25%.
3. Oxidation index is reduced by more than 30%.
4. Thermal shock resistance is increased by more than 35%.
5. Cold bending strength is increased by more than 20%.
|
Chemical Composition |
Unit |
Specification |
Actual measured indicators |
|
|
Si-O-N |
% |
≥ 98 |
98.63 |
|
|
Fe2O3 |
% |
≤ 0.15 |
0.091 |
|
|
CaO |
% |
≤ 0.1 |
0.021 |
|
|
TiO2 |
% |
≤ 0.1 |
0.01 |
|
|
Al2O3 |
% |
≤ 1.0 |
0.61 |
|
|
Na2O |
% |
≤ 0.1 |
0.005 |
|
|
Physical Properties |
||||
|
D10 |
μm |
/ |
0.667 |
|
|
D50 |
μm |
/ |
3.065 |
|
|
D90 |
μm |
/ |
21.032 |
|
XRD pattern of the microcrystalline Si-N-O multiphase ultrafine powder
Microstructure of Microcrystalline Si-N-O multiphase ultrafine powder by SEM
