ABSTRACT

A novel raceway heat and material balance model is developed considering all physico-chemical phenomena surrounding the raceway of the blast furnace (BF). This model is unique, as it considers reactions based on thermodynamics and determines important parameters such as raceway adiabatic flame temperature (RAFT), bosh gas properties, raceway coke rate etc. Importantly, the model also predicts blowing parameters in case of known RAFT and permeability of the furnace. This paper focuses on the raceway regime only considering the effect of different injectants, H₂, CO, CH₄, CO₂ and coke oven gas (COG). Firstly, the paper describes the modelling approach, based on thermodynamic, heat and material balances. The first part of the paper quantifies the effect of injectants on the raceway keeping the blowing parameters constant, whereas second part presents the changes of raceway properties as well as blowing parameters keeping RAFT and permeability of the furnace constant.

摘要

考虑到高炉 (BF) 滚道周围的所有物理化学现象，开发了一种新颖的滚道热和材料平衡模型。该模型是独一无二的，因为它考虑了基于热力学的反应，并确定了重要参数，如滚道绝热火焰温度 (RAFT)、炉腹气体性质、滚道焦炭率等。重要的是，该模型还可以在已知 RAFT 和渗透率的情况下预测吹炼参数炉子的。本文重点关注滚道状态，仅考虑不同注入剂 H ₂、CO、CH ₄、CO _2的影响和焦炉煤气 (COG)。首先，本文描述了基于热力学、热量和物质平衡的建模方法。本文的第一部分量化了在保持吹炼参数恒定的情况下喷射剂对滚道的影响，而第二部分则介绍了在保持熔炉的 RAFT 和渗透率恒定的情况下滚道特性以及吹炼参数的变化。