Combustion Synthesis of Composition Ferroalloys

Area of Science:

• Metallurgical Engineering
• Materials Science
• Chemical Engineering

Background:

• Developing efficient methods for producing ferroalloy composites is crucial for the steel industry.
• Existing self-propagating high-temperature synthesis (SHS) technologies require adaptation for metallurgical applications, particularly for utilizing waste materials.

Purpose of the Study:

• To present research on a specialized SHS technology for ferroalloy composites in steelmaking.
• To develop a new approach for implementing SHS in metallurgy, using metallurgic alloys and waste products.
• To investigate the self-propagating high-temperature synthesis of ferrovanadium nitride.

Main Methods:

• The study employs a metallurgical variation of SHS, utilizing exothermic exchange reactions with metallurgic alloys and waste dust.
• Combustion regimes were analyzed, with thermal trimming principles applied to weakly exothermic systems.
• The nitriding of ferrovanadium, specifically σ-(Fe-V), was investigated to understand its impact on combustion and mechanism.

Main Results:

• A new approach to metallurgical SHS was developed, enabling the production of iron-based composite materials from alloys and waste.
• The study identified that the initial alloy's phase composition significantly influences ferrovanadium combustion patterns and mechanisms during nitriding.
• Process activation during the nitriding of σ-(Fe-V) was observed, linked to a phase transition at ~1200 °C, resulting in a composite of molten iron and solid vanadium nitride.

Conclusions:

• The developed metallurgical SHS technology offers a viable method for producing specialized ferroalloy composites, including from waste materials.
• Understanding the influence of initial alloy phase composition is critical for optimizing SHS processes in ferrovanadium nitride production.
• The research contributes to advancing SHS applications in metallurgy for enhanced steelmaking material production.