Ferro vanadium

Fe-V is vanadium based ferroalloy used for the modification of the microstructure of steel and for increasing the tensile strength, hardness, and high temperature strength of steel. It is used in the high speed steels. Vanadium content in Fe-V ranges from 35 % to 80 %.

Fe-V is produced by a carbo-thermic or a metallo-thermic (alumino thermic) reduction of vanadium oxides, assisted by the presence of iron. Since carbon is used in a carbo-thermic reduction, the carbon content of the ferroalloy is normally high. Hence the process cannot be used if there is a requirement for low carbon content. Low carbon Fe-V is normally produced by an alumino thermic reduction.

The basic raw materials for the production of Fe-V are vanadium oxides (V2O3, V2O4, and V2O5) with lime, aluminum and iron or steel scrap used as additives. The production is carried out in an electric-arc furnace. Scrap iron is first melted, and a mixture of vanadium oxides, aluminum, and a flux such as calcium fluoride or calcium oxide is added. In the ensuing reaction, the aluminum metal is converted to alumina, forming a slag, and the vanadium oxides are reduced to ferro vanadium. When necessary, grinding, sizing, and drying of the materials are carried out prior to charging the mix to the smelting process.

Specification

Specification Ferro vanadium V 78-82% - C < 0.2%
Size 10-60mm(Min.90%)
C Max 0/2%
S 0/05%
Si Max 1/5%
P 0/05%
V 78-82%
Cu 0/1%
Al Max 1%