Abstract
In order to get useful informations for improving operating conditions in DH degassing process, a mathematical model is developed in this work.
In this model, the suction period when molten steel flows up into vacuum vessel from ladle and the discharge period when molten steel flows down into ladle from vacuum vessel have been analysed theoretically, and variations of gas pressure in vacuum vessel during degassing process have been considered.
On the basis of the model, the effects of the operating variables, namely, volume flow rate of exhaust gas, suction rate of molten steel and suction ratio of the volume of molten steel in vacuum vessel to the total volume of molten steel, on the degassing rate have been calculated with thd aid of digital computer.
