The effect of top slag basicity on quality of steel treated with SiFe and SiCaBa alloy as exothermic agent in chemical heating was studied. These experiments were carried out in MoSi2 laboratory furnace with 0.2kg mol...The effect of top slag basicity on quality of steel treated with SiFe and SiCaBa alloy as exothermic agent in chemical heating was studied. These experiments were carried out in MoSi2 laboratory furnace with 0.2kg molten steel for equilibrium test and 2kg molten steel for simulation test respectively. These results showed that the adjusting basicity of top slag with CaO is effective to prevent rephosphorization and resulphurization, and it is possible to dephosphorize and desulphurize and remove the inclusions from molten steel when basicity R of the top slag is adjusted to 2.0-3.10, and SiCaBa alloy is better than SiFe alloy in this relation.展开更多
The interfacial tension at the Na2O-Li2O-SiO2-B2O3 slag-steel boundary has been determined in the temperature range of 1 803-1 873K by sessile drop method with the transmission X-ray technique. It was found that the v...The interfacial tension at the Na2O-Li2O-SiO2-B2O3 slag-steel boundary has been determined in the temperature range of 1 803-1 873K by sessile drop method with the transmission X-ray technique. It was found that the variation of interfacial tension with temperature in the system of molten steel/Na2O-Li2O-SiO2-B2O3 slag in the temperature range of 1 803-1 873K is pretty little. The interfacial tension remarkably decreases with increasing the oxygen and/or sulfur content in molten steel. It suggesed that the oxygen and sulfur dissolved in molten steel act as a surface-active solute at the slag-steel interface. Consequently, the interfacial tension depends, in most part, on the oxygen content in molten steel, but the composition of the slag has a minor effect on the interfacial tension. In order to clear the effect of slag composition on the interfacial tension, the experimental results are discussed. The interfacial tension is observed to increase with increasing Na2O and Li2O contents, and decrease with increasing silica content in slag. The influence of B2O3 on the interfacial tension is pretty little.展开更多
The influence of three different blowing conditions on the slag splashing process in a basic oxygen furnace for steelmaking is analyzed here using two-dimensional transient Computational Fluid Dynamics simulations. Fo...The influence of three different blowing conditions on the slag splashing process in a basic oxygen furnace for steelmaking is analyzed here using two-dimensional transient Computational Fluid Dynamics simulations. Four blowing conditions are considered in the computer runs: top blowing, combined blowing using just a bottom centered nozzle, combined blowing using two bottom lateral nozzles, and full combined blowing using the three top and the three bottom nozzles. Computer simulations show that full combined blowing provides greater slag splashing than conventional top blowing.展开更多
基金Sponsored by National Natural Science Foundation(59874014)
文摘The effect of top slag basicity on quality of steel treated with SiFe and SiCaBa alloy as exothermic agent in chemical heating was studied. These experiments were carried out in MoSi2 laboratory furnace with 0.2kg molten steel for equilibrium test and 2kg molten steel for simulation test respectively. These results showed that the adjusting basicity of top slag with CaO is effective to prevent rephosphorization and resulphurization, and it is possible to dephosphorize and desulphurize and remove the inclusions from molten steel when basicity R of the top slag is adjusted to 2.0-3.10, and SiCaBa alloy is better than SiFe alloy in this relation.
文摘The interfacial tension at the Na2O-Li2O-SiO2-B2O3 slag-steel boundary has been determined in the temperature range of 1 803-1 873K by sessile drop method with the transmission X-ray technique. It was found that the variation of interfacial tension with temperature in the system of molten steel/Na2O-Li2O-SiO2-B2O3 slag in the temperature range of 1 803-1 873K is pretty little. The interfacial tension remarkably decreases with increasing the oxygen and/or sulfur content in molten steel. It suggesed that the oxygen and sulfur dissolved in molten steel act as a surface-active solute at the slag-steel interface. Consequently, the interfacial tension depends, in most part, on the oxygen content in molten steel, but the composition of the slag has a minor effect on the interfacial tension. In order to clear the effect of slag composition on the interfacial tension, the experimental results are discussed. The interfacial tension is observed to increase with increasing Na2O and Li2O contents, and decrease with increasing silica content in slag. The influence of B2O3 on the interfacial tension is pretty little.
文摘The influence of three different blowing conditions on the slag splashing process in a basic oxygen furnace for steelmaking is analyzed here using two-dimensional transient Computational Fluid Dynamics simulations. Four blowing conditions are considered in the computer runs: top blowing, combined blowing using just a bottom centered nozzle, combined blowing using two bottom lateral nozzles, and full combined blowing using the three top and the three bottom nozzles. Computer simulations show that full combined blowing provides greater slag splashing than conventional top blowing.
基金the financial support from the Applied Basic Research Project of Yunnan Province,China(No.202301AT070411)the Analysis and Testing Foundation of Kunming University of Science and Technology,China(No.2021P20191102002)。
