1. Institute of Thermal Science and Power Engineering, Naval University of Engineering, Wuhan 430033,Hubei, China 2. Military Key Laboratory for Naval Ship Power Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China 3. College of Power Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China
Abstract：Based on causal analysis and stock- flow analysis, a dynamic model for iron element flow in converter steelmaking process is established using the methods of system dynamics, which is validated by the accurate simulation results. Moreover, the dynamic characteristics of the iron element flow in billet, the iron element loss flow and the iron element stock flow in converter are analyzed when the iron element flow return rate of the unit and the upstream iron element flow return rate change with time under different return circumstance. The results show that the iron element stock in converter and the iron element loss flow are not affected by the upstream iron element flow return rate, but gradually increase to new steady output states with the increase of the iron element flow return rate of the unit. The increase of the upstream iron element flow return rate causes a reduction of the stable output , which has no effect on the compactness of converter steelmaking process. Although the increase of the iron element flow return rate of the unit makes no difference on the stable output, it results in the deterioration of the compactness. When the iron element flow returns to both the upstream process and the unit, the stable output and the compactness are both affected.
2015, Vol. 25 
