Research On New Type Supercolossal Bloom Continuous Casting Mold

With the development of modern industry, the traditional dimension steel can hardlymeet the needs of market, such as bridge and tunnel industry, thus supercolossalcross-section slab is greatly needed to satisfy the infrastructural needs. This papersuggested building700mm×700mm supercolossal bloom continuous casting machine onthe basis of practical needs. The process of heat transfer of mold and the characteristicsof new mold technology were analyzed according to bloom continuous casting. Finally,an inner cooler was applied to the mold of700mm×700mm bloom. CFD technology andANSYS software were used to do simulation of the flow, temperature and solidificationprocess of molten steel in the mold, and the temperature and thermal stress of mold wereanalyzed as well. It has theoretical and practical significance in the built of700mm×700mm bloom continuous casting, doing further research about new moldtechnology.(1) The drawing of the complex mold was given and analyzed the effects of innercooler.(2) The CFD software FLUENT was applied to build the3-D model of slab ofcomplex mold, the flow and the temperature of mold were studied when different moldswere used to casting. The advantages of complex were vividly revealed according toresult of simulation.(3) The processes of solidification of molten steel were in-depth studied with the useof solidification/molten model of FLUENT. The temperature contour and liquid fractioncontour of the different cross-section of mold, the temperature curve of slab and surfacecentral, the curve of shell thickness along mold were given.(4) Fluid-Solid interaction coupling thermal model of outer mold and inner coolerwith steel were built, which was used to study the temperature distribution of outer moldand inner cooler. The heat resistance was closely investigated, the influence of the heatresistance between steel and mold and the flow of mold were considered in the process of modeling. ANSYS software was applied to calculate the stress and strain distribution oftwo parts of complex mold combined with temperature, which provided reference forfurther research in continuous casting and inner cooler.