高风温技术在迁钢高炉上的应用

通过历年我国钢铁企业、宝钢和首钢风温变化,反映了我国近年的风温现状和技术进步,特别指出了首钢风温的巨大进步。从热风炉高风温、热风管道输送高风温和高炉接受高风温三方面介绍了高风温技术研究进展。通过高风温技术在迁钢2号高炉的应用,首钢在2008年高风温试验基础上,2009年取得重大突破,实现日均风温最高1283℃,连续4月月均1270℃以上风温,年均风温为1258.7℃。通过分析2008和2009试验风温均匀性,表明风温均匀指数有所提高。并分析了热风炉炉顶温度、混风、空煤气预热温度、操作制度等风温影响因素,从高炉原燃料、技术指标和操作方面,阐述了高风温在高炉使用情况,反映了高风温受热风炉系统、热风管道和高炉等因素制约。提出了本次高风温试验存在的风温潜力、高风温节能作用和风温稳定性等问题,为进一步高风温研究提供指导。

Application of High Blast Temperature on Qiangang's Blast Furnace

With the historical changes ofblast temperature in Chinese steel enterprises： BaosteelandShougang, present status and technology progress of blast temperature in China in recent years are showed, especially, great progress of blast temperature in Shougang is pointed out. Study progress of high blast temperature technology is introduced from three aspects such as high blast temperature of hot blast stove, high blast temperature transport of hot pipe and high blast temperature accepted by blast furnace. By the application of high blast temperature techtology to Qiangang＇ s No. 2 blast furnace, and on the base of high blast temperature test in 2008, great progress is made in 2009. The highest daily average blast temperature is 1 283 ℃, monthly average blast temperature is above 1 270 ℃ for continuous 4 months, yearly average blast temperature is 1 258.7 ℃. By the analysis of blast temperature equality of experimentations in 2008 and 2009, it shows that equality index of blast temperature is improved. Effect factor of blast temperature is analyzed such as top temperature of stove, mixed blast, preheated temperature of gas and air, stove operation system and so on, high blast temperature used in blast furnace based on raw and fuel material, technique index and operation, and it is restricted by stove system, hot pipe and blast furnace. The problems in high blast temperature test such as blast temperature potential, energy-saving function and blast temperature stability are pointed out. This will offer reference for more high temperature studies.