这种预处理工艺分两步，第一步是铁水脱硫，第二步为脱硫铁水提钒。
The pretreatment process includes two steps, the first step is hot metal desulphurization, and the second is the vanadium extraction.
脱硫铁水经撇渣后，进行二次预处理，即转炉提钒。
The second step of the pretreatment, the vanadium extraction process in BOF is carried out after slag steelmaking.
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