| Abstract: | It described a numerical simulation study for the interfacial behaviour between molten steel and liquid slag layer with different flow-control technologies in the slab continuous casting mold, considering the effects of argon gas flow rate, casting speed and current intensity of coils on the interfacial behaviour of molten steel and liquid slag with the coupling action of electromagnetic brake (EMBr) and argon gas injection. The relationship between the level fluctuation index of F value and level fluctuation of free surface was also investigated. For a given casting speed with EMBr, increasing the argon gas flow rate can aggravate the local fluctuation of interface so much as lead to the breakup of the steel-slag interface, F value increases with the increasing argon gas flow rate and the thickness of liquid slag near the meniscus increases linearly with F value. For a given argon gas flow rate with EMBr, increasing the casting speed has helpful for restraining the interfacial fluctuation near the nozzle, and F value also increasing, the thickness of liquid slag near the meniscus reduces linearly with F value. On the contrary, for a certain casting speed and argon gas flow rate, increasing the current intensity of coils can aggravate the steel/slag interfacial fluctuation near the nozzle. |
