论文部分内容阅读
炉顶煤气循环-氧气鼓风高炉炼铁新技术的工艺特点决定了煤粉在其回旋区内的燃烧条件与传统高炉相比将发生很大变化.本文建立了氧气高炉直吹管—风口—回旋区下部煤粉流动和燃烧的数学模型,研究了入口布置方式、氧含量、循环煤气温度以及H2O和CO2含量对煤粉燃烧的影响.模拟结果表明:三种引入方式中,假想的循环煤气和氧气混合进入方式明显优于循环煤气和氧气单独进入方式.当氧的体积分数由80%增加到90%,相应的煤粉燃尽率由87.525%提高到93.402%.循环煤气温度对煤粉燃尽率的影响并不显著.循环煤气中H2O和CO2的体积分数提高5%,风口轴线上气体的最高温度分别降低124 K和113 K.
Top gas circulation - Oxygen blast blast furnace ironmaking technology determines the characteristics of the new coal in its raceway combustion conditions will be greatly changed compared with the traditional blast furnace.In this paper, the oxygen blast furnace blower - tuyere - maneuver The effect of inlet arrangement, oxygen content, circulating gas temperature and H 2 O and CO 2 content on the combustion of pulverized coal was studied. The simulation results show that hypothetical circulating gas and Oxygen mixed into the way significantly better than the cycle gas and oxygen alone into the way when the volume fraction of oxygen increased from 80% to 90%, the corresponding burn rate of the pulverized coal increased from 87.525% to 93.402% .Circulating gas temperature on the pulverized coal combustion The effect of exhaustion rate is not significant.The volume fraction of H2O and CO2 in the circulating gas increases by 5%, and the maximum temperature of the tuyere axis decreases by 124 K and 113 K, respectively.