Optimization of Raceway Adiabatic Flame Temperature Model for H2-Rich Gas Injection Blast Furnace

IF 2.5 3区材料科学 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY

Journal of Sustainable Metallurgy Pub Date : 2024-08-30 DOI:10.1007/s40831-024-00909-z

Buxin Chen, Junyu Chen, Chenguang Bai, Meilong Hu, Mao Chen

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Abstract

The raceway adiabatic flame temperature (RAFT) is the basis for judging the thermal state of the hearth and an important parameter for the blast furnace (BF) operation. However, the traditional model fails to accurately characterize the actual RAFT suitable for H₂-rich gas injection BF. In this study, a RAFT heat balance model suitable for BF with injection of H₂-rich gas (shale gas, coke oven gas and H₂) was optimized. The influences of the H₂ concentrations in tuyere gases, O₂ enrichment ratio, pulverized coal injection (PCI) quantity and blast humidity on RAFT were calculated and the mathematical formula was set up through multiple linear regression. The results show that with the injection rate of coke oven gas, H₂ and shale gas, the RAFT decreases at a rate of 10.4 ℃ per kg, 14.7 ℃ per kg and 5.92 ℃ per kg, respectively. In addition, RAFT increases with the increase of oxygen enrichment ratio, while decreases with the increase of PCI quantity and blast humidity. Changing the oxygen enrichment ratio, PCI quantity and blast humidity can modulate RAFT when the H₂-rich gas is injected into BF. This work provides a reference for the H₂-rich gas injection BF.

Graphical Abstract

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优化富含 H2 气体喷射高炉的赛道绝热火焰温度模型

滚道绝热火焰温度（RAFT）是判断炉膛热状态的基础，也是高炉（BF）运行的重要参数。然而，传统模型无法准确表征适合富含 H2 气体喷吹高炉的实际 RAFT。本研究优化了适用于注入富含 H2 气体（页岩气、焦炉煤气和 H2）的高炉的 RAFT 热平衡模型。通过多元线性回归，计算了喷嘴气体中 H2 浓度、O2 富集比、煤粉喷射量（PCI）和鼓风湿度对 RAFT 的影响，并建立了数学公式。结果表明，随着焦炉煤气、H2 和页岩气喷入量的增加，RAFT 分别以每公斤 10.4 ℃、14.7 ℃ 和 5.92 ℃ 的速率下降。此外，RAFT 随着富氧比的增加而增加，而随着 PCI 量和鼓风湿度的增加而减少。改变富氧比、PCI 数量和喷砂湿度可以调节富含 H2- 气体注入 BF 时的 RAFT。这项工作为富H2气体喷射BF提供了参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Sustainable Metallurgy Materials Science-Metals and Alloys

CiteScore

4.00

自引率

12.50%

发文量

151

期刊介绍： Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.