AOD炉的高效化冶炼模型

Efficient Smelting Model of AOD Furnace Steelmaking

以往的AOD炉高效化冶炼研究往往通过提高供氧强度,优化转炉的炉容比,提高终点命中率等技术缩短冶炼周期,需要充分利用现有的设备,优化炉料结构和供氧制度,对生产工艺参数进行优化,充分利用这些物理热和化学热,实现AOD炉的高效化冶炼。开发了AOD炉高效化冶炼模型,在AOD炉物料平衡和能量平衡的基础上,结合AOD炉冶炼的工艺特征,建立AOD炉耗氧量和冶炼周期模型,分析了AOD炉冶炼周期随着铁水比和废钢比的变化趋势,得出冶炼周期最短时的炉料结构。结果表明:电炉不锈钢母液加铁水冶炼时,冶炼周期随着铁水比的增加而增加。电炉不锈钢母液加废钢冶炼时,冶炼周期随着废钢比的增加而增加。铁水加废钢冶炼时,冶炼周期随着废钢比的增加而延长。以硅铁为发热剂比以碳粉为发热剂冶炼周期短。

The research on traditional AOD efficient smelting was focused on enhancement of oxygen supply,optimization of improving volume ratio,increasing end hitting rate.Current device should be made full of,and AOD charging structure and oxygen supply should be optimized.Process parameters of AOD should be optimized.Physical heat and chemical heat should be rational used,and efficient smelting of AOD should be realized.Based on mass balance model and energy balance model,the model of AOD efficient smelting was proposed considering process features of AOD steelmaking.The change of tap to tap time with hot metal ratio and scrap steel ratio was simulated.The charging structure was got when tap to tap time was the shortest.The results indicate that the tap to tap time increases with molten iron ratio increasing in AOD steelmaking process with EAF stainless molten iron and BF molten iron.The tap to tap time increases with scrap steel ratio increasing in AOD steelmaking process with EAF stainless molten iron and scrap steel.The tap to tap time increases with scrap steel ratio increasing in AOD steelmaking process with BF molten iron and scrap steel.The tap to tap time with ferrosilicon heating agent is shorter than the time with carbon powder heating agent.