Flow Control with Ruler Electromagnetic Braking (EMBr) in Continuous Casting of Steel Slabs
نویسندگان
چکیده
Electromagnetic forces are an important tool to control fluid flow in the mold, combined with other casting conditions, nozzle, and mold geometry. Methods include static magnetic fields (local and ruler EMBr), and time-varying magnetic fields, such as electromagnetic stirring, (EMS), multi-mode EMS, electromagnetic level stabilizers (EMLS), and electromagnetic level accelerators (EMLA). Optimal use can stabilize flow, leading to fewer surface defects, fewer inclusions, and improved microstructure. Numerical models are an important tool to optimize electromagnetic flow control, but the complexities make validation essential. This paper presents transient flow predictions using high-resolution computational models, validated with analytical solutions, laboratory measurements, and plant measurements. The results provide new insights into the optimal position of EMBr fields. Locating the field below the nozzle ports leads to stable, higher-velocity surface flow.
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