By analysing principle, hydraulic pressure, seal, the feasibility of oil pressure method about main gear in striking refinement vanadium steel converter are discussed.

The causes behind breakage of the catalyst are excessive sodium and vanadium content in the feed oil, excessively high regeneration temperature and excessively high steam velocity in riser pipe.

On the one hand, the effect of vanadium on A3 steel in high-sulfur residual oil system;