40t电弧炉炼钢冶炼周期和电耗优化实践

Optimization of Tap to Tap Time and Electricity Consumption in a 40 t Electric Arc Furnace

电弧炉短流程炼钢是当今世界主要的炼钢方法之一,在能耗和碳排放上较长流程均有明显的优势。缩短冶炼时间,降低冶炼电耗,是现今电弧炉炼钢企业提升核心竞争力的重要途径之一,合理的调度工艺、供电和供氧制度对电弧炉生产效率、钢水质量、钢铁料消耗和炉衬的寿命有显著的影响。结合某钢厂40t电弧炉生产实践,针对某钢厂行车运行不畅通、电能利用效率不高和电氧匹配较难等问题,介绍了电弧炉高效化生产技术,通过优化生产组织、实施科学供电、供氧制度等操作提高电弧炉冶炼效率。通过优化行车调度,电弧炉生产率大幅提高,平均冶炼周期由127min缩短至110min;结合改进不同时期供电挡位选择和氧枪的流量的设置,冶炼电耗明显降低,吨钢冶炼电耗由427kW·h/t减少至405kW·h/t。

Electric arc furnace short process steelmaking is one of the main steelmaking methods in the world today,with significant advantages in energy consumption and carbon emissions compared to longer processes.Shortening smelting time and reducing smelting power consumption is one of the important ways for current electric arc furnace steelmaking enterprises to enhance their core competitiveness.Reasonable scheduling processes,power supply and oxygen supply systems have a significant impact on the production efficiency,steel quality,steel material consumption,and furnace lining life of electric arc furnaces.Based on the production practice of a 40 t electric arc furnace in a certain steel plant,this paper introduces the high-eficiency production technology of electric arc furnace in response to the problems such as obstructed driving operation,low energy utilization efficiency,and difficult matching of electricity and oxygen in a certain steel plant.By optimizing production organization,implementing scientific power supply,oxygen supply system,and other operations,the smelting efficiency of electric arc furnace is improved.By optimizing train scheduling,the productivity of the electric arc furnace has significantly increased,and the average Tap to Tap time(TTT)has been shortened from 127 minutes to 110 minutes;by improving the selection of power supply gears during different periods and setting the flow rate of oxygen guns,the electrical consumption has significantly decreased,and the electrical consumption per ton of steel smelting has decreased from 427kW·h/t to 405kW·h/t.