Cold-model numerical study of raceway shape and size effect on gas and fines flow behaviour in packed bed between the raceway and cohesive zone

IF 1.7 3区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Ironmaking & Steelmaking Pub Date : 2023-05-23 DOI:10.1080/03019233.2023.2212214

Ferdin Sagai Don Bosco, S. Kamble, S. Lakshminarasimha, G. Gupta

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引用次数: 1

Abstract

ABSTRACT Operational stability and productivity of an iron-making blast furnace relies on the permeability of the bed, which is adversely affected by the accumulation of unburnt coal and fine coke powder resulting from Pulverised Coal Injection (PCI) and coke degradation. Stable operation at a high PCI rate necessitates an understanding of gas-fine powder distribution, which is affected by the cohesive zone, and raceway shape and size. A computational study of a laterally injected gas-fine powder flow through a tuyere, into a packed bed is conducted in the presence of raceway and cohesive layers. An experimental correlation is used to predict the static holdup. The effect of operational parameters such as gas flow rate, particle and fine properties, and structural parameters such as cohesive zone configuration, porosity, and tuyere protrusion are analysed. Sensitivity analysis shows raceway shape, size, and interaction with the cohesive blocks affects the distribution and accumulation of fine powder.

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滚道形状和尺寸对滚道和粘性区之间填充床中气体和细粒流动行为影响的冷模型数值研究

炼铁高炉的运行稳定性和生产率取决于床层的渗透性，而床层的透气性会受到煤粉喷射（PCI）和焦炭降解产生的未燃烧煤和细焦粉积聚的不利影响。在高PCI速率下的稳定操作需要了解气体细粉末的分布，这受到粘合区以及滚道形状和尺寸的影响。在存在滚道和粘性层的情况下，对通过风口进入填充床的侧向喷射气体细粉末流进行了计算研究。采用实验相关性来预测静态滞留率。分析了气体流量、颗粒和精细特性等操作参数以及粘结区结构、孔隙率和风口突出度等结构参数的影响。敏感性分析表明，滚道的形状、尺寸以及与粘性块的相互作用会影响细粉的分布和积累。

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来源期刊

Ironmaking & Steelmaking 工程技术-冶金工程

CiteScore

3.70

自引率

9.50%

发文量

125

审稿时长

2.9 months

期刊介绍： Ironmaking & Steelmaking: Processes, Products and Applications monitors international technological advances in the industry with a strong element of engineering and product related material. First class refereed papers from the international iron and steel community cover all stages of the process, from ironmaking and its attendant technologies, through casting and steelmaking, to rolling, forming and delivery of the product, including monitoring, quality assurance and environmental issues. The journal also carries research profiles, features on technological and industry developments and expert reviews on major conferences.