摘要
燃料分层分布是一种基于烧结料层自动蓄热效应,沿料层高度调整燃料配比,从而降低燃料消耗的技术。本文基于计算流体力学CFD模型模拟燃料分布烧结过程,以料层中最高温度为基准,分析三层燃料分布对烧结性能的影响。结果表明,焦炭含量对烧结料层最高温度分布、熔体生成及二氧化碳排放影响显著。适度增加上、中层焦炭含量能加速熔体生成,提升热量传递均匀性,提高烧结矿质量。当上、中、下层焦炭质量分数分别为5.1%、3.9%、3.3%时,与传统工艺相比,总焦炭使用量可以减少0.3个百分点,固体燃料消耗降低3.38 kg/t。
Fuel stratification distribution is a technology that adjusts the fuel ratio along the height of the material layer based on the automatic heat storage effect of the sintered fuel stratification so as to reduce fuel consumption.In this paper,the sintering process of fuel distribution is simulated based on the computational fluid dynamics CFD model,and the influence of fuel distribution on the sintering performance of the three layers is analyzed based on the highest temperature in the fuel stratification.The results show that the coke content has a significant effect on the maximum temperature distribution,melt formation and carbon dioxide emission of the sintering bed.Moderately increasing the content of coke in the upper and middle layers can accelerate melt formation,improve heat transfer uniformity,and improve the quality of sinter.When the mass fractions of upper,middle and lower coke are 5.1%,3.9%and 3.3%,respectively,the total coke consumption could be reduced by 0.3%and the carbon consumption could be reduced by 3.38 kg/t compared with the traditional process.
作者
张金虎
徐进
刘思达
杨晓波
周宗彦
ZHANG Jinhu;XU Jin;LIU Sida;YANG Xiaobo;ZHOU Zongyan(Jiangxi Provincial Key Laboratory of Particle Technology,Jiangxi University of Science and Technology,Nanchang 330013,Jiangxi,China;Fangda Special Steel Technology Co.,Ltd.,Nanchang 330012,Jiangxi,China)
出处
《烧结球团》
北大核心
2025年第5期1-8,共8页
Sintering and Pelletizing
基金
国家自然科学基金资助项目(52276154)
江西省自然科学基金青年资助项目(20232BAB214043)。
关键词
铁矿石烧结
燃料分层
CFD
低碳
iron ore sintering
fuel stratification
CFD
low carbon
