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作 者:卢庆庆 LU Qingqing(Hunan VALIN LYSTEEL Co.Ltd.,Loudi 417009,China)
机构地区:[1]湖南华菱涟源钢铁有限公司,湖南娄底417009
出 处:《工业加热》2025年第3期79-84,共6页Industrial Heating
摘 要:热轧板厂2250热轧线现有4座加热炉,其中2号炉和3号炉为空气单蓄热室步进加热炉,分别建于2009年和2010年。1号炉和4号炉为常规步进加热炉,分别建于2018年和2021年。空气单蓄热室加热炉能够将空气预热温度提高至1100℃,能够有效解决低热值条件下炉温不容易起来的问题,然而空气单蓄热室加热炉在投产不到2年的时间内炉墙便开始出现烧红、冒火现象。后续多次停炉检修,累计停炉检修时间达36天,修复时间跨度超过2年,采取更换烧嘴,重新砌筑炉墙的方式均未能彻底解决问题。最终通过不断总结前面的修复经验,仔细分析炉墙冒火机理,确定了一些有效的修复措施,才彻底解决炉墙烧红、冒火的问题。本文针对这一问题从实际出发,就空气单蓄热室烧嘴的结构、工作原理、运行工况等方面展开分析,结合整个炉墙的修复过程,追本溯源,找到问题根本,对症下药,不断完善修复措施,措施实施后解决了炉墙易烧红、冒火的问题,效果显著。There are 4 heating furnaces in the 2250 hot rolling line of the hot rolling mill,of which the No.2 furnace and the No.3 furnace are air single regenerator stepping heating furnaces,which were built in 2009 and 2010 respectively.Furnace No.1 and Furnace No.4 are conventional walking furnaces,built in 2018 and 2021 respectively.The air single regenerator heating furnace can increase the air preheating temperature to 1100 ℃,which can effectively solve the problem that the furnace temperature is not easy to rise under the condition of low calorific value,but the furnace wall of the air single regenerator heating furnace began to burn red and fire in less than 2 years after it was put into operation.The subsequent shutdown of the furnace for maintenance has been carried out for many times,with a cumulative shutdown time of 36 days and a repair time span of more than 2 years.Finally,by continuously summarizing the previous repair experience,careflly analyzing the fire mechanism of the furnace wall,and determining some effective repair measures,the problem of the furnace wall burning red and burning was completely solved.In view of this problem,it analyzes the structure,working principle and operating conditions of the burner in the air single regenerator,combines the repair process of the entire furnace wall,traces back to the source,finds the root of the problem,prescribes the right medicine,and continuously improves the repair measures,after the implementation of the measures,the problem that the furnace wall is easy to burn red and burst into flames has been solved,and the effect is remarkable.
分 类 号:TG155.1[金属学及工艺—热处理]
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