Abstract: Taking the twin-roll thin strip continuous casting and rolling molten pool with an inverted H-shaped arc distributor as the research object, a three-dimensional numerical calculation model with a width of 1 350 mm and a roll diameter of 500 mm was established. The flow state and temperature distribution were carried out to verify the rationality of the shape design of the inverted H-shaped outlet, and the influence of the same molten steel temperature and different casting speeds on the molten pool flow field and temperature field was analyzed. The results show that the inverted H-shaped outlet flow distributor performs well in the temperature distribution, flow state and solidification of the molten pool. When the temperature of molten steel at the inlet is 1 770 K, the casting speed is increased from 20 m/min to 40 m/min and 60 m/min, the liquid mass fraction at the outlet is changed from 0 to 0.15 and 0.47, the solidified shell is also reduced to 0.5 mm and 0.1 mm.The rational working casting speed is about 40 m/min.

Key words: twin roll strip, distributor, flow field, temperature field, solidification