Ferro Silicon Nitride

1.) Ferro silicon nitride use
　　Powdered ferrosilicon nitride is mainly used in the plugging slurry of large blast furnace, and a small amount of it is used in iron ditch material or other unshaped refractory materials.
　　Granular ferrosilicon nitride is mainly used in oriented silicon steel or other steel using nitride to improve the strength (such as HRB400 rebar).
　　Ferro silicon nitride is also an additive for the production of cold rolled unidirectional silicon steel sheet. The product can be added to the metal melt to obtain good room temperature and low temperature strength, good corrosion resistance, thermal shock and wear resistance.
　　Ferro Silicon Nitride is an emerging high quality refractory raw materials, can replace the higher price of silicon nitride, used in large blast furnace anhydrous gun clay; has a very good opening, help sintering, anti-leaching, low-cost features.
　　2.) The use of ferrosilicon nitride
　　Ferro silicon nitride in the developed countries of the blast furnace slurry has been widely used, so that the slurry open plugging performance has been significantly better to meet the needs of the blast furnace iron, and has become an indispensable component of the modern large blast furnace slurry. In addition, adding a small amount of ferrosilicon nitride into the iron ditch material greatly improves the iron flux of the iron ditch. Japan began to use ferrosilicon nitride in the 1970s.
　　Domestic application of ferrosilicon nitride time is relatively short, Baosteel in 1994, the first in the clay added silicon nitride, so that the clay performance to meet the needs of Baosteel ironmaking. Other domestic steel mills are basically in the use of ferrosilicon nitride, because the sales price of ferrosilicon nitride is about half of the sales price of silicon nitride, in addition to the use of the performance of the two are basically close. In the past three years, the large steel enterprises in the country more than 2000M3 blast furnace plugging slurry basically use ferrosilicon nitride. Add ferrosilicon nitride gun mud well meet the needs of large blast furnace, so that the number of blast furnace iron out of 18 times generally reduced to 12 times, the low down to 6 times. The consumption of slurry is reduced from 1.2kg/ton of iron to 0.5kg/ton of iron.
　　In steelmaking, granular ferrosilicon nitride was firstly used in the production of oriented silicon steel, which can supplement a certain amount of nitrogen for molten steel in a relatively stable manner. Domestic use of ferrosilicon nitride amounted to hundreds of tons a year. Advances in smelting technology has led to the rapid development of microalloyed steel production in China. Steel strengthening microalloying elements are mainly vanadium, niobium, titanium. Comparison of calculations and production of practical applications, the production of HRB400 rebar using FeV50 + Fe Si3N4 microalloying program, alloying costs than a single FeV50 tons of steel cost reduction of 127.61 yuan, more stable than the use of traditional SiC, to create a higher level of efficiency.