Effect of Ferrosilicon Nitride on Magnesia Casting Properties
Ferrosilicon nitride is different from ordinary ferrosilicon. Although ferrosilicon nitride is often used in metallurgy, its performance is very different from that of ferrosilicon. Ferrosilicon nitride is often used as a refractory material, and common ones include anhydrous gun clay, ferrosilicon nitride ceramic products, etc. Ferrosilicon nitride is also widely used in castables, and magnesia castables are common. The addition of ferrosilicon nitride also has some impact on the properties of magnesia castables.
| Chemical Composition (%) | Si3N4 | Si | N | Fe | Al+Ca |
| Element Content | 75~80 | 47~51 | 30~33 | 12~16 | <2.5 |
| Element Content | 70~75 | 49~52 | 28~30 | 12~16 | <2.5 |
Magnesia refractory materials have become one of the auxiliary materials widely used in the metallurgical industry due to their high fire resistance, high-temperature strength, and resistance to alkaline slag erosion. The steelmaking process mainly relies on slag to remove harmful impurities. To resist the erosion of these slags and absorb harmful impurities in steel, and to make clean steel, only alkaline magnesia refractory materials are more suitable.
As the additional amount of ferrosilicon nitride increases, the drying strength of the castable decreases, and the medium temperature strength first increases and then decreases. When the additional amount of ferrosilicon nitride is 3%, the high-temperature strength first increases and then decreases; the thermal resistance of The folding strength reaches a maximum when the additional amount of ferrosilicon nitride is 3%. Ferrosilicon nitride can be partially oxidized into silicon dioxide during the heating process, and then form fibrous forsterite, which increases the strength; the iron phase material can solid dissolve with periclase to promote sintering.
Ferrosilicon nitride can not only improve the performance of gun clay in gun clay but can also help the castables exert greater advantages when used in magnesia castables. After all, ferrosilicon nitride is used as a raw material. When used, the amount should be controlled according to the usage requirements, to avoid using too much or too little and affecting the performance of the refractory material. The ferrosilicon nitride provided by our company is of reliable quality. If you want to know more, you can contact us.
Ferrosilicon 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 an off-white granular.
Granular ferrosilicon nitride is mainly used in silicon-oriented steel or other steels (Such as HRB400 rebar) that use nitrides to improve strength.