What Is The Application Of Ferrosilicon Nitride in Refractory Materials?

The application of ferrosilicon nitride in castables mainly focuses on Al2O3-SiC-C iron ditch castables, magnesium castables and high-aluminum castables.

Taps mud is an important refractory material used to block the taphole of blast furnaces. When tapping iron, slag and iron are discharged from the taphole at the same time. With the large-scale and long-life blast furnaces, the continuous strengthening of smelting technologies such as high wind temperature, oxygen-enriched injection, and high pressure has put forward higher requirements for the performance of the taphole mud, such as high resistance to chemical, slag and pig iron corrosion, good sintering and filling properties, excellent thermal shock resistance and high-temperature volume stability, low environmental pollution, easy opening, and can extend the tapping time and protect the furnace.

During actual use, the taphole mud containing silicon ferronitride has stable iron flow, no abnormal phenomena such as splashing and red spots, high high-temperature flexural strength, strong resistance to molten iron erosion, and can achieve stable tapping for more than 60 minutes. It can completely block the taphole without drilling wind and fire.

Composite refractory materials are composed of two or more refractory raw materials of different properties, which are composed of refractory materials with new properties in the macroscopic (microscopic) level through physical or chemical methods. The application of silicon ferronitride in composite refractory materials mainly focuses on carbon-containing composite materials and carbon-free composite materials.