Nitrided Ferroalloy Production By Metallurgical SHS Process: Scientific Foundations and Technology


The main objective of this paper is to present results of the research in the development of a specialized self-propagating high-temperature synthesis (SHS) technology for ferroalloy composites, as applied to steelmaking. The problem of creating such a production cycle has been solved by developing a new approach to the practical implementation of self-propagating high-temperature synthesis, as applied to metallurgy. The metallurgical variation of SHS is based on the use of different metallurgic alloys (including waste in the form of dust from ferroalloy production) as basic raw materials in the new process. Here, the process of synthesis by combustion is realized through exothermic exchange reactions. The process produces a composite, based on inorganic compositions with a bond of iron and/or alloy based on iron. It has been shown that in terms of the aggregate state of initial reagents, metallurgical SHS processes are either gasless or gas-absorbing. Combustion regimes significantly differ when realized in practice. To organize the metallurgical SHS process in weakly exothermic systems, different variations of the thermal trimming principle are used. In the present study, self-propagating high-temperature synthesis of ferrovanadium nitride, ferrochromium nitride and ferrosilicon nitride; which is widely used in steel alloying, was investigated.

Keywords: self-propagating high-temperature synthesis (SHS); composite ferroalloys; nitrides; borides; filtration combustion; ferrovanadium nitride ferrochromium nitride and ferrosilicon nitride

[1] Merzhanov, A.G., Mukasyan, A.C. (2007) Tverdoplamennoye goreniye [Solid-flame combustion]. Moscow, TORUS PRESS. 336 p. (in Russian)

[2] Shatokhin, I.M., Ziatdinov, M.Kh., Bigeev, V.A., Manashev, I.R. Bukreev, A.E. (2012) Primeneniye SVS-tekhnologiy v metallurgii [Application SHS-technologies in metallurgy]. Magnitogorsk, Magnitogorsk State Technical University. 91 p. (in Russian)

[3] Gasik, M.I., Lyakishev, N.P., Yemlin, B.I. (1988) Teoriya i tekhnologiya proizvodstva ferro-splavov [Theory and technology of ferroalloy production]. Moscow, Metallurgiya. 784 p. (in Russian)

[4] Pavlov, S.F., Snitko, Yu.P., Plyukhin, S.B. (2001) Otkhody i vybrosy pri proizvodstve ferrosilitsiya [Wastes and emissions of ferrosilicon production]. Elektrometallurgiya, 7:22–28. (in Russian)

[5] Vlasova, M.V., Lavrenko, V.A., Dyubova, L.Yu., Gonzalez-Rodriguez, Kakasey M.G. (2001) Nitriding of Ferrosilicon Powders. Journal of Materials Synthesis and Processing, 9(3):111–117. (in Russian)

[6] Ziatdinov, M.Kh. (2016) Goreniye khroma v sputnom potoke azota [Combustion of chromium in co-current flow of nitrogen]. Fizika Goreniya i Vzryva, 52(4):51–60. (in Russian)