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He H.,5M Wide and Heavy Plate Plant of Xiangtan Iron and Steel Co. | Liu Y.-L.,5M Wide and Heavy Plate Plant of Xiangtan Iron and Steel Co. | Ding J.-H.,5M Wide and Heavy Plate Plant of Xiangtan Iron and Steel Co. | Tang L.-M.,5M Wide and Heavy Plate Plant of Xiangtan Iron and Steel Co.
Kang T'ieh/Iron and Steel (Peking) | Year: 2011

Aiming at the special requirements for the purity of liquid steel and quality of slabs for milling extra-thick plates, such industrial tests as adjustment of slag system for LF refining process, argon blowing for VD and LF and the technological parameters of caster was carried out. The results show that purity of liquid steel come to the desired effects, such as w([P]) ≤ 0.01%, w([S]) ≤ 0.003%, w([O]) ≤ 4 × 10 -6, w([H]) ≤ 0.9 × 10 -6, w([N]) ≤ 35 × 10 -6. Additionally, the quality of slabs are improved markedly, the center segregation of Q345 series steel get to 1.0 and other test steel grade get to 0.5; the central porosity of test steel grades get to 0.5. Source

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