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Main casting high quality steel and alloy steel bloom continuous casting machine, such as heavy rail steel, hard steel wire, spring steel, bearing steel, alloy structural steel, such as key varieties. Slab cooling is the bloom continuous casting is an important part in production process, it directly affects the quality of the casting and production. Continuous casting billet internal crack, surface crack, drum abdomen, and the formation of defects such as center segregation and cooling are closely linked. Pangang's main production of heavy rail steel high carbon steel, the poor thermal conductivity, continuous casting with strong cooling can increase the risk of slab internal crack, but the cooling intensity is insufficient, will cause the shell creep and a drum belly, is generated form the central carbon segregation, vanadium heavy rail steel also has strong crack sensitivity, in the continuous casting process, because of the micro alloying elements in steel vanadium and carbon and nitrogen to form precipitation of compounds that increase the brittleness of steel, casting in the correction process prone to transverse corner crack surface. Therefore, how to determine the generous typical steel billet continuous casting machine and reasonable cooling control system has become important research topics of pangang metallurgy industry. In pangang 2
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