company news about Smelting method of iron vanadium from ZhenAn

Electrosilicothermal method
Flake vanadium pentoxide with 75% ferrosilicon and a small amount of aluminum as reducing agents in alkaline arc furnace, after reduction, refining two stages of qualified products. During the reduction period, all the reducing agent of a furnace and the flake vanadium pentoxide accounting for 60 ~ 70% of the total amount are loaded into the electric furnace, and silicon thermal reduction is carried out under the high calcium oxide slag. When the V2O5 in the slag is less than 0.35%, the slag (called lean slag, can be discarded or used as building materials) is discharged and transferred to the refining period. At this time, flake vanadium pentahydrate and lime are added to remove excess silicon and aluminum in the alloy liquid, and iron alloy can be slag out when the alloy composition meets the requirements. The slag released in the late refining period is called rich slag (containing 8 ~ 12% V2O5), which is returned to be used when the next furnace begins to feed. Alloy liquid is generally cast into cylindrical ingot, after cooling, stripping, crushing and slag cleaning is finished. This method is generally used for smelting iron vanadium containing 40 ~ 60% vanadium. The recovery rate of vanadium can reach 98%. Smelting iron vanadium consumes about 1600 kW • h of electricity per ton.