学术论文

      高炉灌浆过程炉衬应力分布规律

      Stress distribution law of BF linings in grouting

      摘要:
      高炉灌浆补炉是高炉炉体维护的重要技术手段之一,目前国内的灌浆实践均根据经验进行,经常出现炉壳发热、烧红、炉墙顶穿、泥浆料通过砖缝渗入铁液引起爆炸等事故。本文基于有限元理论及弹性力学理论,利用ANSYS软件建立了灌浆过程炉衬应力计算模型,计算了不同灌浆压力、灌浆面积及灌浆位置等条件下炉衬的应力分布。研究发现:灌浆压力的增大仅引起炉衬内最大应力值的变化,不会造成应力穿透,条件允许的情况下可适当增大灌浆压力;单孔灌浆量的增大将导致炉衬应力集中位置向炉内迁移,应采用“少量、多孔”的灌浆操作方针;在炉衬最薄位置灌浆时易造成炉衬热面开裂,应避免在此位置灌浆。模型应用实例表明,本模型计算准确且对灌浆过程的指导是合理有效的。
      Abstract:
      The grouting technology is a very important maintenance method of the blast furnace stack. In China, the grouting process is completed by experience, so the furnace shell is always burnt and the mud material sometimes permeates into hot metal through the furnace lining, leading to accidents. In this paper, a stress calculation model of the furnace lining in the grouting process is set up with ANSYS software based on the finite element method and the theory of elastic mechanics. By using this model, the stress distribution of the furnace lining in the grouting process is calculated under different conditions of grouting pressure, grouting area and grouting location. It is found that the maximum stress in the furnace lining increases along with the increase of grouting pressure, but the stress concentration locates at the same place, and therefore the grouting pressure can be increased under certain conditions. The increase of single-hole grouting quantity causes the stress concentration location of the furnace lining to move towards the hot surface, so the guiding principle of“small quantity and more holes” should be insisted. The probability of lining cracking at the hot surface in-creases when grouting at the thinnest area of the furnace lining, so grouting at this area should be avoided. An application of the model shows that the simulation results are reasonable and effective.
      作者: 李峰光 [1] 张建良 [1] 左海滨 [2] 祁成林 [1] 孙辉 [1]
      Author: LI Feng-guang [1] ZHANG Jian-liang [1] ZUO Hai-bin [2] QI Cheng-lin [1] SUN Hui [1]
      作者单位: 北京科技大学冶金与生态工程学院,北京,100083 北京科技大学钢铁冶金新技术国家重点实验室,北京,100083
      刊 名: 工程科学学报 ISTICEIPKU
      年,卷(期): 2015, (2)
      分类号: TF576.7
      在线出版日期: 2015年3月6日
      基金项目: 国家自然科学基金资助项目