带串联式料斗的无料钟高炉装料和卸料过程中的粒度偏析

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Wang Zeng, Desheng Zou, Guangliang Wang, Wen Zheng, Yichi Zhang, Tianxiang Zhang, Heng Zhou, Shengli Wu, Mingyin Kou
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引用次数: 0

摘要

高炉中的炉料分布不仅决定了煤气流的分布,还会影响高炉的热效率和燃料消耗。因此,研究高炉装料和卸料过程中的炉料偏析行为具有重要意义。在此,基于离散元素法建立了带串联式料斗的 1:1 无料钟炉顶高炉的三维模型。该模型用于模拟料包从皮带下落到离开称重料斗的整个过程。结果表明,上料斗中的粒度偏析比称重料斗中的严重,这也严重影响了称重料斗中的粒度偏析。改变加料顺序会降低两个料斗的偏析程度,但无法改变卸料过程最后阶段的粒度偏析趋势。在卸料过程的最后阶段,小颗粒会聚集在一起,因此在装料基质的最后几圈,应增大溜槽角度,以减少小颗粒的聚集。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Particle Size Segregation during Charging and Discharging Processes in Bell‐Less Blast Furnace with Serial‐Type Hoppers
Burden distribution in a blast furnace not only determines the distribution of gas flow but also affects the thermal efficiency and fuel consumption of the blast furnace. Therefore, it is of great significance to study the burden segregation behaviors during the charging and discharging processes in blast furnaces. Herein, a 3D model of a 1:1 bell‐less top blast furnace with serial‐type hoppers is established based on the discrete element method. The model is used to simulate the entire process of the burden falling from the belt until it leaves the weighing hopper. The results show that the particle size segregation in the upper hopper is more severe than that in the weighing hopper, which also seriously affects the size segregation in the weighing hopper. Changing the charging sequence will reduce the segregation degree in two hoppers, but it cannot change the trend of particle size segregation in the final stage of the discharging process. The small particles are found to gather at the end of the discharging process, so the chute angle should be increased in the last few revolutions of the charging matrix to decrease the accumulation of small particles.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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