10-100MM Nitriding Reaction Ferrosilicon Nitride Lumps
Ferrosilicon nitride material has good corrosion resistance to molten Al, Pb, Sn, Zn, Bi, and molten Mg, Cu, Ni. Excellent corrosion resistance to Cl2, H2S, HCl, H2SO4, HNO3, H2P2O7, but easy to be eroded by HF and NaOH.
Description
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Description
Ferro silicon nitride is a ferroalloy material mainly composed of Si3N4, accompanied by free iron, non-silicon nitride, and a small number of other components. Commercial ferrosilicon nitride for refractory is an off-white or brown powder, while steel-making ferrosilicon nitride is off-white granular.
Specification
|
Brand |
Chemical composition% |
||||
|
N |
Si |
Fe |
O |
C |
|
|
Si3N480-90 |
28-33 |
45-55 |
12-17 |
≤2.0 |
≤0. |
Application
The primary application of ferrosilicon nitride is as a component of taphole clay (also known as taphole mud) in blast furnaces, for which it has largely superseded the more expensive silicon nitride.
Using ferrosilicon nitride in taphole clay provides resistance against chemical corrosion and physical erosion from the liquid iron, and helps avoid thermal shock, leading to improved open-clog performance, reduced clay consumption, and increased furnace holding time.
Ferrosilicon nitride can also be used in iron troughs or other alumina-based refractory castables, and is also sometimes used to increase the strength, wear resistance and corrosion resistance of advanced ceramics, and (in granular form) as a strength-improving alloying component in certain steels.
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