Research on high manganese iron molten steelmaking process of converter
In order to understand the steelmaking situation of high manganese iron in the converter,42 furnace blowing endpoint sampling and temperature measurement were conducted on the 210 t converter of Liangang.Based on the obtained data,the effect of thermodynamic parameters of manganese oxidation reaction(K'Mn,γ(MnO),LMn),slag bisicity,iron oxide,and steel temperature on the thermodynamic parameters of manganese oxidation was calculated.The equilibrium values of the reaction between molten steel and slag at the end point of converter and the deviation from equilibrium state of the reaction were calculated.Using regression analysis method,the relationship between the manganese content in the end-point steel and the converter blowing process parameters was given.The average w(TFe)in the endpoint slag was 20.0%,and the average residual manganese mass fraction in the end-point steel was 0.147%.The average final slag w(MnO)is 6.28%,which is higher than that of normal manganese containing hot metal steelmaking,increasing the fluidity of the slag and facilitating slag melting.The yield of manganese is relatively low(average 23%),which is related to the high silicon content and large slag content in the steelmaking converter.
converter steelmakinghigh manganese ironmanganese oxideyield of manganese