Abstract: The production flow sheet for medium-carbon vanadium steel SG45 (/% : 0. 42 ~0. 50C, 0. 17 ~0. 27Si, 0. 50 ~ 0. 80Mn, ≤0. 035P, ≤0. 035S, 0. 06 ~ 0. 10V) is 60 t LD-LF-VD-CC process. The vanadium direct alloying commercial test is carried out during converter tapping by adding aluminium cladding with steel-alloys ( manganese iron powder, silicon-manganese etc) -vanadium pentoxide self-reducing briquette (/% : 26. 90V₂O₅ powder, 33. 51 silicon iron powder, 16. 74 lime powder and 22. 85 fluorite powder) -premelted slag (/% : 50 ~53CaO, 41 ~46Al₂O₃, ≤4SiO₂, ≤ 4MgO) in ladle. 3 heats pilot production results show that the average yield of vanadium is 95. 13% , the cleanliness and metallurgy quality of steel products are better.

摘要： 中碳钒钢SG45(/%:0.42~0.50C、0.17~0.27Si、0.50~0.80Mn、≤0.035P、≤0.035S、0.06~0.10V)的生产流程为60 t LD-LF-VD-CC工艺。在转炉出钢过程将钢芯铝-合金(锰铁、硅锰等)-五氧化二钒自还原团块(/%:26.90V₂O₅粉,33.51硅铁粉,16.74石灰粉,22.85萤石粉)-预熔渣(/%:50~53CaO、41~46Al₂O₃、≤4SiO₂、≤4MgO)加至钢包进行钒的直接合金化工业试验。3炉试验结果表明,钒的平均收得率为95.13%,钢材洁净度和冶金质量良好。

关键词: 60 t LD-LF-VD-CC 工艺, 钢包, V₂O₅, 直接合金化 , 自还原团块