In the electric arc furnace （EAF） steel production processes, scrap steel is principally used as a raw material instead of iron ore. In the steelmaking process with EAF, scrap is first melted in the furnace and then...In the electric arc furnace （EAF） steel production processes, scrap steel is principally used as a raw material instead of iron ore. In the steelmaking process with EAF, scrap is first melted in the furnace and then the desired chemical composition of the steel can be obtained in a special furnace such as ladle furnace （LF）. This kind of furnace process is used for the secondary refining of alloy steel. LF furnace offers strong heating fluxes and enables precise temperature control, thereby allowing for the addition of desired amounts of various alloying elements. It also provides outstanding desulfurization at high-temperature treatment by reducing molten steel fluxes and removing deoxidation products. Elemental analysis with mass balance modeling is important to know the precise amount of required alloys for the LF input with respect to scrap composition. In present study, chemical reactions with mass conservation law in EAF and LF were modeled altogether as a whole system and chemical compositions of the final steel alloy output can be obtained precisely according to different scrap compositions, alloying elements ratios, and other input amounts. Besides, it was found that the mass efficiency for iron element in the system is 95.93%. These efficiencies are calculated for all input elements as 8. 45% for C, 30.31% for Si, 46.36% for Mn, 30.64% for P, 41.96% for S, and 69.79% for Cr, etc. These efficiencies provide valuable ideas about the amount of the input materials that are vanished or combusted for 100 kg of each of the input materials in the EAF and LF system.展开更多
钢铁料消耗是衡量炼钢生产技术水平的重要经济指标,在炼钢过程中钢铁料消耗成本占总成本的80%以上,有效降低钢铁料消耗是减少炼钢成本、提高企业竞争力的重要途径。通过对电弧炉炼钢过程进行机理分析,研究电弧炉炼钢过程物料转化规律,...钢铁料消耗是衡量炼钢生产技术水平的重要经济指标,在炼钢过程中钢铁料消耗成本占总成本的80%以上,有效降低钢铁料消耗是减少炼钢成本、提高企业竞争力的重要途径。通过对电弧炉炼钢过程进行机理分析,研究电弧炉炼钢过程物料转化规律,建立电弧炉炼钢输入输出平衡关系,得到理论出钢量计算方法。考虑原料特性对于钢铁料消耗的影响,提出以实际出钢量与理论出钢量的比值作为钢铁料消耗评价指标,评价电弧炉炼钢过程中的冶炼操作对钢铁料消耗的影响。采用SQL Server 2012数据库软件与Visual Studio2013开发工具,开发电弧炉炼钢钢铁料消耗评价模型,实现电弧炉冶炼操作对钢铁料消耗影响的评价。为进一步获得各种冶炼操作与钢铁料消耗之间的关系,建立钢铁料消耗优化操作制度奠定基础。展开更多
文摘In the electric arc furnace （EAF） steel production processes, scrap steel is principally used as a raw material instead of iron ore. In the steelmaking process with EAF, scrap is first melted in the furnace and then the desired chemical composition of the steel can be obtained in a special furnace such as ladle furnace （LF）. This kind of furnace process is used for the secondary refining of alloy steel. LF furnace offers strong heating fluxes and enables precise temperature control, thereby allowing for the addition of desired amounts of various alloying elements. It also provides outstanding desulfurization at high-temperature treatment by reducing molten steel fluxes and removing deoxidation products. Elemental analysis with mass balance modeling is important to know the precise amount of required alloys for the LF input with respect to scrap composition. In present study, chemical reactions with mass conservation law in EAF and LF were modeled altogether as a whole system and chemical compositions of the final steel alloy output can be obtained precisely according to different scrap compositions, alloying elements ratios, and other input amounts. Besides, it was found that the mass efficiency for iron element in the system is 95.93%. These efficiencies are calculated for all input elements as 8. 45% for C, 30.31% for Si, 46.36% for Mn, 30.64% for P, 41.96% for S, and 69.79% for Cr, etc. These efficiencies provide valuable ideas about the amount of the input materials that are vanished or combusted for 100 kg of each of the input materials in the EAF and LF system.
文摘钢铁料消耗是衡量炼钢生产技术水平的重要经济指标,在炼钢过程中钢铁料消耗成本占总成本的80%以上,有效降低钢铁料消耗是减少炼钢成本、提高企业竞争力的重要途径。通过对电弧炉炼钢过程进行机理分析,研究电弧炉炼钢过程物料转化规律,建立电弧炉炼钢输入输出平衡关系,得到理论出钢量计算方法。考虑原料特性对于钢铁料消耗的影响,提出以实际出钢量与理论出钢量的比值作为钢铁料消耗评价指标,评价电弧炉炼钢过程中的冶炼操作对钢铁料消耗的影响。采用SQL Server 2012数据库软件与Visual Studio2013开发工具,开发电弧炉炼钢钢铁料消耗评价模型,实现电弧炉冶炼操作对钢铁料消耗影响的评价。为进一步获得各种冶炼操作与钢铁料消耗之间的关系,建立钢铁料消耗优化操作制度奠定基础。
