高炉炉料软熔滴落性能的研究现状与展望
Research status and prospect of softening-melting properties for blast furnace charge
王艺帆 1郄亚娜 1张淑会 1朱建秋 2刘然 1纪恒3
作者信息
- 1. 华北理工大学冶金与能源学院,河北唐山 063009;教育部现代冶金技术重点实验室,河北唐山 063009
- 2. 河钢股份有限公司承德分公司,河北承德 067002
- 3. 河钢材料技术研究院,河北石家庄 050023
- 折叠
摘要
高炉生产能耗高、CO2排放量大,在国家"双碳"背景下,稳定顺行是高炉节能减排的重要前提.高炉软熔带的形状、厚度、位置决定着炉内煤气流的二次分布,对高炉顺行起决定性作用.含铁炉料的软熔滴落性能试验在一定的负载和还原条件下模拟高炉内渣铁形成过程,是目前表征高炉软熔带矿石软化熔融过程的最直接手段.综述了高炉炉料软熔滴落性能的研究现状及影响因素,指出改善炉内矿石还原条件及炉料造渣过程是优化炉料软熔滴落性能与软熔带分布的根本.在不影响高炉炉渣性能的前提下,适当调整炉料化学成分、调整炉料结构、增加球团矿比例、向焦炭中添加CaO等碱性物质以及使用富氢气体还原等均能改善矿石在高炉内的还原条件,优化软熔滴落性能.高炉富氢冶炼是未来高炉发展的重要方向,对高炉炼铁节能减排及高炉顺行具有重要意义.
Abstract
Energy consumption is high and CO2 emission is large in blast furnace production.In the national back-ground of"double-carbon strategy",smooth running is an important premise of energy saving and emission reduc-tion for the blast furnace.The shape,thickness and position of the cohesive zone in blast furnace determine the sec-ondary distribution of the gas flow in the furnace,which plays a decisive role in the blast furnace running.At pres-ent,the softening-melting property test of iron-bearing furnace charge simulates the formation process of slag and i-ron in blast furnace under certain load and reduction conditions,which is the most direct means to characterize the softening and melting process of cohesive zone ore of blast furnace.The research status and influencing factors of softening-melting properties of blast furnace charge is summarized.It is pointed out that improving the reduction condition of ore in the furnace and the slag-making process are the fundamental factors to optimize the softening-melting properties and the cohesive zone distribution of blast furnace.On the premise of not affecting the perform-ance of blast furnace slag,the reduction conditions of ore in blast furnace can be improved by adjusting the chemical composition of furnace burden,adjusting the design of furnace burden,increasing the proportion of pellets,adding alkaline substances such as CaO to the coke,and using hydrogen-rich gas reduction,so as to optimize the softening-melting properties.Hydrogen-rich smelting of blast furnace is an important direction for the future development of blast furnace,which is of great significance for energy saving,emission reduction and smooth running of blast fur-nace ironmaking.
关键词
高炉/软熔带/软熔滴落性能/炉料结构/富氢冶炼Key words
blast furnace/cohesive zone/softening-melting property/charge structure/hydrogen-rich smelting引用本文复制引用
基金项目
国家自然科学基金(52104328)
河北省重点研发计划(22374003D)
河北省自然科学基金(E2021209023)
出版年
2024
NETL
NSTL
万方数据