Study On 50t LF Ladle About Argon Bottom Blowing Optimizing In Tangsteel

As the development of purity steel production technology and continuous casting technology, secondary refining process and equipment rapidly popularied all over the world. LF refining technology is the key process to control steel quality in most of the steel enterprises because of its excellent refined effect. As the motive force of the circulating in ladle furnace, Ladle blowing ways and technological parameters determine the molten steel circulating conditions to a large degree, and it also have significant impact on heat , mass transfer and inclusions movement in molten steel flowing.For the second steelmaking and rolling factory 50tLF, mathematical and physical simulation were used to study on steel fluid flow behavior with different blow argon arrangement ways in haplopore and binocular. The best of bottom blowing argon hole arrangement and appropriate bottom blowing argon quantity were determined. Structure of ladle was improved. molten steel flow condition was optimized, Refining effect of LF was enhanced.In commercial software FLUENT operation platform, Mixtuer multiphase model was used to calculate numerical simulation in ladle blow argon process, and molten steel flow states in different arrangement of bottom blowing argon hole.were researched. Molten steel flow condition, remove inclusion, surface residue layer flow state and surface residue layer flow state were considered by blow argon quantity and blow ways. The optimal way of binocular same side decentration blow argon were adopted at the last. Similar principle was used to establish water mode similar experiment and test the reliability of the mathematic simulation. This experimental ladle was made of organic glass, uses water simulated molten steel. Air compressor was used to offer air simulated bottom blowing argon, and quantity of bottom blowing argon was set by flowmeter.Equal Froude is used to calculate the corresponding bottom blowing air volume. Different bottom blowing volume and ways of bottom blowing effect on flow field and blending time were researched. At the condition of being Froude and Web is equal, density for 850 kg/m3 of liquid paraffin simulation slag was chose, slag entrapment critical quantity and steel surface flow state in different arrangement of bottom blowing argon hole were got. The results show that, in the same amount of argon, the shortest blending time was got at bottom blowing argon with binocular in the same side decentration blow argon got the shortest blending time. The flow distribution state is homogeneous and steady in steel ladle, which can eliminate stiring dead zone, and the flow velocity of molten steel is uniformly and steady which can avoid slag entrapment in molten steel, and provide favorable dynamic conditions for removal carryover.