Gao Xudong, Zhang Run, You Zhixiong, Yu Wenzhou, Dang Jie, Bai Chenguang
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing 400044, China.
Materials (Basel). 2022 Sep 1;15(17):6078. doi: 10.3390/ma15176078.
The iron and steel industry is a major CO emitter and an important subject for the implementation of carbon emission reduction goals and tasks. Due to the complex ore composition and low iron grade, vanadium-bearing titanomagnetite smelting in a blast furnace consumes more coke and emits more carbon than in an ordinary blast furnace. Injecting hydrogen-rich gas into blast furnace can not only partially replace coke, but also reduce the carbon emission. Based on the whole furnace and zonal energy and mass balance of blast furnace, the operation window of the blast furnace smelting vanadium-bearing titanomagnetite is established in this study on the premise that the thermal state of the blast furnace is basically unchanged (raceway adiabatic flame temperature and top gas temperature). The effects of different injection amounts of hydrogen-rich gases (shale gas, coke oven gas, and hydrogen) on raceway adiabatic flame temperature and top gas temperature, and the influence of blast temperature and preheating temperature of hydrogen-rich gases on operation window are calculated and analyzed. This study provides a certain theoretical reference for the follow-up practice of hydrogen-rich smelting of vanadium-bearing titanomagnetite in blast furnace.
钢铁行业是主要的二氧化碳排放源，也是实施碳排放 reduction 目标和任务的重要对象。由于矿石成分复杂、铁品位低，高炉冶炼含钒钛磁铁矿比普通高炉消耗更多焦炭，碳排放也更多。向高炉喷吹富氢气体不仅可以部分替代焦炭，还能减少碳排放。基于高炉全炉和区域的能量与质量平衡，本研究在高炉热状态基本不变（回旋区绝热火焰温度和炉顶煤气温度）的前提下，建立了高炉冶炼含钒钛磁铁矿的操作窗口。计算并分析了不同喷吹量的富氢气体（页岩气、焦炉煤气和氢气）对回旋区绝热火焰温度和炉顶煤气温度的影响，以及富氢气体的鼓风温度和预热温度对操作窗口的影响。本研究为后续高炉富氢冶炼含钒钛磁铁矿的实践提供了一定的理论参考。
