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Effect of top slag Basicity on Quality of Steel Treated by Exothermic Agent SiFe and SiCaBa during Chemical Heating

Journal of Iron and Steel Research International 2002年第1期9卷 12-15页

作者： WANG Hai-chuan ZHOU Yun WANG Shi-jun YUE Ke-xiang DONG Yuan-chi Anhui University of Technology

The effect of top slag basicity on quality of steel treated with SiFe and SiCaBa alloy as exothermic agent in chemical heating was *** experiments were carried out in MoSi_2 laboratory furnace with 0.2 kg molten steel for equilibrium test and 2 kg molten steel for simulation test *** 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.

关键词： chemical heating top slag basicity SiFe SiCaBa exothermic agent

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Study of Interfacial Tension between Molten Steel and Na2O-Li2O-SiO2-B2O3 slag

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Journal of Iron and Steel Research International 2002年第1期9卷 6-11页

作者： XIAO Feng MUKAI Kusuhiro Kyushu Institute of Technology

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 MoSi 2 laboratory furnace with 0 2?kg molten steel for equilibrium test and 2?kg 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.

关键词： chemical heating top slag basicity SiFe SiCaBa exothermic agent

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维普期刊数据库

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Effect of Calcium Treatment on Non-Metallic Inclusions in Ultra-Low Oxygen Steel Refined by High Basicity High Al_2O_3 slag

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Journal of Iron and Steel Research International 2011年第7期18卷 8-14页

作者： YANG Jun WANG Xin-hua JIANG Min WANG Wan-jun School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

The influence of calcium treatment on non-metallic inclusions had been studied when control technology of refining top slag in ladle furnace was used in ultra-low oxygen steelmaking. A sufficient amount aluminium was added to experimental heats for final deoxidizing during BOF tapping, and the refining top slag with strong reducibility, high basicity and high Al2O3 in ladle furnace was used to produce ultra-low oxygen steel and the transformation of nonmetallic inclusions in molten steel was compared by calcium treatment and no calcium treatment. The results show that the transformation of Al2O3--MgO - Al2O3 spinel-CaO-MgO-Al2O3 complex inclusions has been completed for aluminum deoxidation products and calcium treatment to molten steel is unnecessary when using the control technology of ladle furnace refining top slag to produce ultra-low oxygen steel, and the complex inclusions are liquid at the temperature of steelmaking and easily removable to obtain very high cleanliness steel by flotation. Further- more, the problems of nozzle clogging in casting operations do not happen and the remaining oxide inclusions in steel are the relatively lower melting point complex inclusions.

关键词： ultra low oxygen top slag deoxidization aluminium oxide inclusion calcium treatment

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