The Devanadation Process of Low Silicon Vanadium - Containing Irons in the BOF withCombined Blowing
For the first time in our country the devanadation technology of low silicate vanadium-containing iron with the combined blowing has been developed and implemented by industrial scale equipment on the Nizhny Tagil Iron and Steel Works. This technology ensures to reduce the residual concentration of vanadium in high-carbon semiproduct to 0,03 - 0,04 % and increases of the vanadium extraction to the slag by 4,5 %. Regulated optimal parameters of the process (design of the lance, flow of oxygen and bottom blowing, end of devanadation temperature, silicon content in iron), which allow to reduce the residual concentration of vanadium to 0,025 - 0,030 % and increases the vanadium extraction by 2 - 3 % was defined.