The flake Vanadium pentoxide produced by electrosilicothermal method was refined into qualified products by using 75% ferrosilicon and a small amount of aluminum as reductants in alkaline arc furnace through two stages of reduction and refining. During the reduction period, all the reducing agents in one furnace and the flake Vanadium pentoxide accounting for 60 ~ 70% of the total amount were loaded into the electric furnace for silicon thermal reduction under high calcium oxide slag. When the V2O5 in the slag is below 0.35%, the slag (called lean slag, which can be discarded or used as a building material) is discharged and transferred to the refining period. At this time, flake Vanadium pentoxide and lime are added to remove excess silicon, aluminum, etc., from the alloy solution. When the alloy composition meets the requirements, slag and ferroalloy can be produced. The slag released at the later stage of refining is called rich slag (V2O5 content up to 8 ~ 12%), which is returned to be used at the beginning of the next furnace loading. Alloy liquid is generally cast into cylindrical ingot, after cooling, demoulding, crushing, slag removal for finished products. This method is usually used for smelting iron vanadium containing 40 ~ 60% vanadium. The recovery rate of vanadium can reach 98%. The power consumption per ton of iron vanadium refining is about 1600 kW•H.

Aluminum is used as reducing agent in thermite process, which is smelted in the furnace tube lined with alkaline furnace by low fire method. A small part of the mixed charge is first put into the reactor, that is, ignition. After the reaction begins, residual charges will be added in turn. It is usually used for smelting high ferrotype (containing 60 ~ 80% vanadium), and the recovery rate is slightly lower than that of electrosilicon thermal method, about 90 ~ 95%