摘要
张宣科技氢基竖炉氧气系统检修,不能实施喷氧部分燃烧。竖炉进口温度由1020℃下降至933℃,炉内热量收入减少,还原段温度下降,CH_(4)重整减少,H_(2)含量下降,煤气利用率下降,DRI日产量、金属化率降低,COG单耗、DRI含碳量升高。通过提高加热炉出口温度、提高循环气体流量、增加循环气体湿分等措施,取得了一定的效果,降低了氢基竖炉技术经济指标的劣化程度。无喷氧生产实践表明,高压COG直接补充至还原回路的措施是不可取的,对提高循环气体中H_(2)、CO含量作用甚微,而提高底气流量补充至还原回路是有效措施。
The oxygen system of the hydrogen-based shaft furnace of ZXHT is overhauled,and the oxygen cannot be injected to burn the process gas partially.The furnace encounters the following problems:the inlet temperature of the shaft furnace drops from 1020℃to 933℃,the heat input of the furnace cuts,the temperature of the reduction section decreases,CH_(4)reformationcapacity weakens,H_(2)content becomes less,the gas utilization rate declines,the daily output decreases,metallization rate of DRI falls,and the COG consumption and DRI carbon content rise up.By increasing the outlet temperature of the heater,the flow rate of circulating gas,and the humidity of circulating gas,positivechanges of hydrogen-based shaft furnaceare seen and the deterioration of techno-economic indicators decelerates.The practice of shaft furnace production under the condition of no oxygen injection proves that it is not a wise way to supply the high-pressure COG to the reduction circuit because this method cannot make the H,and CO content in the circulating gasincrease obviously,instead,the effective way falls on increasing the flowrateof bottom gas and supplying the bottom gas to the reduction circuit.
作者
王海涛
WANG Haitao(Hydrogen Metallurgy Company of HBIS ZXHT,Xuanhua 075100,Hebei,China)
出处
《炼铁》
CAS
北大核心
2024年第4期68-71,76,共5页
Ironmaking
基金
河北省重点研发计划资助项目(21314001D)。
关键词
氢基竖炉
喷氧
竖炉进口温度
循环气体
加热炉出口温度
hydrogen-based shaft furnace
oxygen injection
inlet temperature of shaft furnace
circulating gas
outlet temperature of the heater
