昆钢6~#高炉炉缸炉底侵蚀模型的开发

【作者】 冯一奇；

【导师】 丁跃华；

【作者基本信息】 昆明理工大学 ， 冶金物理化学， 2008， 硕士

【摘要】 高炉长寿、高效、低耗是国内外钢铁企业不懈追求的目标。随着现代高炉向炉容大型化、生产高效化方向不断发展,高炉长寿的重要性日益显现。高炉炉衬侵蚀监测是钢铁工业现代化的重要组成部分,对于生产安全和生产效率有着重要的意义。本文从企业实际需求入手,综述了高炉长寿的状况和炉缸炉底的侵蚀机理,并对国内外的侵蚀模型进行了分析。在此基础上,论述了本课题的必要性、重要性和可行性。针对昆钢6~#高炉(2000m~3)炉缸炉底的情况,从传热学的角度出发,开发了对炉缸炉底侵蚀状况进行监测的二维数学模型。通过对模型的计算,得到了炉缸炉底的温度场分布。从计算所得到的侵蚀图来看,1150℃侵蚀线位于第五层碳砖的位置,无明显的“象脚状”侵蚀,6~#高炉炉缸炉底的侵蚀状况基本正常。探求了炉缸炉底侵蚀的原因,认为K、Na、Zn、Pb等有害元素是高炉受到侵蚀的主要原因,这为采取措施延长高炉寿命提供了有益的依据。根据炉缸炉底侵蚀的原因,揭示了含钛物料护炉的机理,提出了实现昆钢高炉长寿的技术措施,指出在炉龄晚期,进行钛矿护炉是延长高炉使用寿命的重要手段。此后作者根据所做的工作,提出了利于侵蚀监测的热电偶的优化布置方案,为高炉长寿提供技术支持。更多还原

【Abstract】 The longevity, high efficiency and low consumption of blast furnace are important targets pursued by the iron and steel enterprises all over the world . With the development of big modern blast furnace and high efficiency production , the blast furnace longevity is of great importance. The monitoring of wear-line in blast furnace is of great significance in modern industry .which is of benefits to manufacture safety and economic efficiency.In this paper, starting with actual application of the enterpriser , the state of blast furnace（BF） campaign life and the erosion mechanism of BF hearth and bottom are expounded. And at the same time, the previous methods for predicting BF hearth and bottom erosion are also analysed.Then, discussing the necessity, importance and feasible nature of this subject.According to condition of hearth and bottom of No. 6 BF（2000m³ ） at Kunming Iron & Steel Groud a two-dimensional mathematical model monitoring the erosion of blast furnace hearth and bottom was developed using the theory of heat transfer.The temperature field of hearth and bottom was obtained. The calculated erosion graph indicates that erosion line at 1150°C is located in the fifth layer of carbon-brick and there is not big shape of "elephant foot" .This kind of erosion is quite normal.Reasons for the erosion of the hearth and bottom was analyzed. auther believes the synthetic erosion of harmful elements such as kalium , natrium,zinc and lead is the main factor which leads to the erosion of hearth and bottom. This provides good basis prolonging the life of the BF.According to the reasons for erosion of hearth and bottom, The mechanism of lining protection with TiO₂ was further revealed , the technical measures which make the blast furnace high efficiency and long compaign were put forward .During the late campaign, lining protection with TiO₂ is the important means of prolonging furnace life .Also the optimum arangement of thermal couples in hearth and bottom is suggested based on previous work, which is technical supporting for prolonging the life of the BF.更多还原