10-100mm Si3n4 Ferrosilicon Nitride

Applications of FeSiN in refractory materials:

Currently, ferro-silicon nitride is mainly used in castables, gunning mixes, and composite refractory materials.

Ferro-silicon nitride:

Castables: Ferro-silicon nitride is mainly used in Al2O3-SiC-C iron trough castables, magnesia castables, high-alumina castables, and other castables.

Gunning mixes: Gunning mixes are essential refractory materials for plugging iron in blast furnaces, allowing slag and iron to be discharged simultaneously during tapping. With advancements in blast furnace technology, such as large-scale operation, longer service life, high-temperature injection of air, and high-pressure operation, higher performance requirements for gunning mixes have emerged, including resistance to chemical attack, slag attack, and hot metal attack, good sintering and filling properties, good thermal shock resistance, high-temperature volume stability, low environmental pollution, easy opening, extended tapping time, and furnace protection. Gunning mixes containing ferro-silicon nitride exhibit stable iron flow during actual use, with no abnormal phenomena such as splashing or red spots. They have high high-temperature flexural strength, strong resistance to hot metal erosion, stable tapping time of over 60 minutes, complete sealing of the tap hole, and no issues such as air leakage or drilling.

Composite refractory materials: Composite refractory materials are formed by combining two or more different types of refractory raw materials through physical or chemical methods to create refractory materials with new properties. The application of ferro-silicon nitride in composite refractory materials mainly focuses on carbon-containing composites and non-carbon-containing composites.