Tap-Hole Clays added with Ferrosilicon Nitride were developed to increase productivity and quality of metals produced in blast furnaces. Tap-Hole and gutter materials made with the addition of Ferrosilicon Nitride proved to be highly effective and are widely used by the leader companies of the steel industry that aim high performance for the blast-furnace production. Ferrosilicon Nitride content vary from 5 to 30% depending on the operating conditions, mainly the size of the blast furnace and the conditions of hot-metal and slag discharge.
The introduction of Ferrosilicon Nitride increases the strength and wear resistance of the refractories at high temperature, increases their thermal stability and resistance to oxidation, and reduces the thermal-expansion coefficient, with simultaneous increase in thermal conductivity.
Ferrosilicon Nitride refractories have a smaller coefficient of thermal expansion compared to the silicon carbide and high alumina refractories. Ferrosilicon Nitride refractories are more resistant to abrasion by the hot metal and the slag and they do not shrink on repeated heating.
Ferro Silicon Nitride is an alloy additive in smelting of cold-rolling orientated silicon steel. Its addition increases strength and improves corrosion-resistance, thermal shock resistance and abrasion resistance of steels. In comparison with the traditional manganese and chromium alloys used for alloying in smelting corrosion-resistant steel, the consumption of the ferrosilicon nitride is considerably less.
Advanced Ceramics with additions of Ferrosilicon Nitride have been replacing metals in the production of bearings, mechanical seals, chemical pumps, nozzles, auto parts, heat exchange components, welding pins, vacuum equipment and a variety of harsh environment. Ferrosilicon Nitride Ceramics are suitable for high temperature structural materials allowing high strength, good wear resistance, high stiffness and corrosion resistance.
Due to the use of Ferrosilicon Nitride, it is possible to achieve temperature resistance and stable layers with excellent anti adherent properties in Casting Coatings and Industrial & Maintenance paints. Those properties are retained even in direct contact with liquid metals and slag. The layer can therefore protect the painted surface reducing wear and improving lubricating property.