Optimization Of SEN In Bloom Mold

This paper based on studying a bloom mold of a Steel Factory. we adopt the method ofphysical simulation, studied the flow field in mold when different SEN, such as thesingle-outlet-hole SEN, four-outlet-hole SEN and five-outlet-hole SEN were used, includingstarting M-EMS or not. As a result, the following results were found:(1) No matter starting M-EMS or not, under the certain middle aperture, the effect of alltrumpet SEN is better than the straight SEN. But the effect of the trumpet SEN and straight SENis worse than four-outlet-hole and five-outlet-hole SEN apparently.(2) In the condition of without M-EMS, the flow backwards phenomenon of the primary SENis very serious,the best parameter of structure and craft of the new four-outlet-hole SEN isθ=θ1, K=K1, bottom structure is hollow bottom. Compared with the best four-outlet-hole SENSY1 and primary SEN, the former P is smaller 10~13Pa, S冲is lowered 74mm, t均decreased9.64 seconds, t到reduced 1.1 seconds.(3) Under the condition of without M-EMS, the best parameter of structure and craft of thefive-outlet-hole SEN isθ=θ2, K=K1, d=d1, H=H1. Compared with the best five-outlet-holeSEN WY1 and primary SEN, the former P is smaller 11~16Pa, S冲is lowered 78mm, t均decreased 7.09 seconds, t到reduced 0.62 seconds.(4) In the condition of starting M-EMS, the multi-outlet-hole SEN were used in casting,compared with non M-EMS, S冲and t到were no obvious change, B is 2~4 times as much aswithout M-EMS. T均of the primary SEN is shorter 14.94 seconds than without M-EMS, t均ofthe new four-outlet-hole and five-outlet-hole SEN is shorter 7~12 seconds than without M-EMS.The effect of DSY1 and DWY1 is better than primary SEN.(5) The intensity of electromagnetic stirring is reasonable when the velocity of superficialfluid is between 0.15 and 0.2m/s, the corresponding electric current of stirrer in the steel factoryis 342~456A.