ABSTRACT

The data obtained on 220-T ultra-high power electric arc furnace (EAF) were analysed in order to study the impact of DRI quality on the steelmaking process parameters and consumption of lime, coke, oxygen, natural gas, electrical energy and electrodes. In addition, the effects of charging methods and proportions of DRI in an EAF were studied. It was found that by increasing the proportion of non-high quality reduced pellets and/or HBI to 45% of the metallic charge, the steel yield decreased to 85.32% and increased to 87.57% when between 75 and 100% continuous feeding of high quality reduced pellets. This resulted in saving 21 min in tap-to-tap time and 7% of the electrode consumption. Charging high proportion of non-high quality DRI from 45% to 100% in EAF, leads to a loss of 4 tons/heat in liquid steel, and an increase in lime consumption from 4 to 6 kg/ton liquid steel.

摘要

为研究DRI质量对炼钢工艺参数和石灰、焦炭、氧气、天然气、电能和电极消耗量的影响，对220-T超高功率电弧炉（EAF）获得的数据进行了分析。此外，还研究了 EAF 中的充电方法和 DRI 比例的影响。结果表明，通过将非优质还原球团和/或 HBI 的比例增加到金属装料的 45%，钢产量下降到 85.32%，当在 75% 和 100% 之间高质量连续进料时，钢产量增加到 87.57%减少颗粒。这导致分接时间节省了 21 分钟，电极消耗量减少了 7%。在电弧炉中加入45%至100%的高比例非优质DRI，导致钢水损失4吨/热，