共查询到16条相似文献,搜索用时 875 毫秒
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转炉在服役过程中,存在炉壳热变形过大、耐火砖破裂等问题,直接影响到设备的安全运行,分析炉体的温度和应力分布,能为优化炉体冷却系统、避免应力集中提供支持。为此,建立包括非水冷式托圈、炉体与悬挂结构的转炉整体有限元模型,考虑炉体与托圈、悬挂之间的相互热辐射,采用ANSYS仿真软件研究炉体的稳态温度场,并对炉体的机械应力和热应力进行分析。结果表明,工作层炉衬热面温度为1 600℃时,炉壳的上锥段和炉身部位温度较高,最高可达435℃,接近炉壳的蠕变温度,有限元模拟结果与工业数据基本一致;炉体的热应力要远大于机械应力,炉衬的热面等效应力较大,易出现裂纹;炉壳的温度和应力分布在结构过渡处会有明显突变。研究结果可为炉体冷却和炉型设计提供理论依据。 相似文献
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宝钢300t转炉新炉型炉壳有限元法强度分析研究 总被引:1,自引:0,他引:1
对宝钢 30 0t转炉新炉型炉壳进行了有限元强度分析 ,计算结果表明 ,该炉壳在机械荷载 (炉体自重和钢水重力 )、温度荷载及热膨胀压力等联合作用下所产生的综合应力 ,在转炉炉壳的许用应力允许值之内 ;其所产生的变形 ,也在新炉型炉壳的刚度设计范围内。 相似文献
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宝钢300t转炉新炉型壳有限元法强度分析研究 总被引:1,自引:0,他引:1
对宝钢300t转炉新炉型炉壳进行了有限元强度分析,计算结果表明,该炉壳在机械荷载(炉体自重和钢水重力)、温度荷载及热膨胀压力等联合作用下所产生的综合应力,在转炉炉壳的许用应力允许值之内;其所产生的变形,也在新炉型炉壳的刚度设计范围内。 相似文献
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攀钢120吨转炉的扩容设计,需要炉体在冶炼过程中各部位温度分布数据,作为各部位结构强度验算的计算依据。为此,在攀钢提钒炼钢厂1~#转炉上,分别测定了托圈和炉壳外表面各测点的温度。根据炉体各部位的具体情况,确定采用焊接开路热电偶接触式和低温红外测温仪非接触式测定相结合的方法进行测定。对用红外测 相似文献
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宝钢300t转炉炉壳更换中的新技术 总被引:2,自引:0,他引:2
介绍了宝钢 1、3号 30 0 t转炉炉壳国产化工程中采用的新型炉壳材料、新的炉体设计制造技术、新的炉体空气冷却系统以及新的炉体快速拆装等新技术 ,为我国大型转炉炉体自行设计制造、自己更新安装提供了可借鉴的经验。 相似文献
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A numerical model for calculation of temperature and thermal stress in initial steel shell in plate and grooved slab continuous casting moulds was established to predict the influence of steel carbon content on the temperature and stress fields. The calculated results show that the temperature non-uniformity and surface stress of the initial shell increase as the steel temperature decreases. Among the steel grades with carbon contents of 0.06, 0.17, 0.45 and 0.80 wt-%, the initial shell surface stress of steel with 0.17 wt-% (peritectic steel) is the highest. In the grooved mould the temperature non-uniformity and surface stress of the initial shell are significantly lower than those in the plate mould. At 1.7 s after initial shell formation, the non-uniformity of shell surface temperature and stress in the grooved mould are four to nine times and three to nine times, respectively, lower than those in the plate mould. 相似文献
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针对氨合成塔外壳用钢单重、壁厚的大幅增加以及相应技术要求的日趋加严等难题,舞钢基于化工关键设备运行安全稳定高效的创新成分设计,并结合当前生产线的装备水平,创造性地采用电渣生产工艺成功开发出大型氨合成塔外壳用特厚电渣板。结果表明,钢质纯净、成分均匀、组织致密细小,同时具有碳当量低、优良的室温、高温拉伸性能和良好的负温冲击性能,内外在质量优异。钢板厚度达177 mm,成品单重37.9 t,厚度、单重国内第一,技术要求接近该类钢现阶段的极限水平,钢板替代进口,用于国内某化工项目中大型氨合成塔的设计与制造。 相似文献
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210 t转炉是包钢薄板坯连铸连轧厂的主要设备,而炉壳是其重要部件,焊接工艺直接影响薄板的正常生产.文章介绍了该炉壳焊接工艺方案的选择、制定及效果. 相似文献
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唐奇山 《金属材料与冶金工程》2000,(4):39-41
介绍了湘钢对转炉钢渣采用红渣倾翻打水自淬预处理及机械加工处理生产渣钢及烧结溶剂料的工艺、生产设施及投资情况,通过这一实践,除可回收大量铁资源处,还可降低环境污染,年节支创效数百万元。 相似文献
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A coupled finite-element model, CON2D, has been developed to simulate temperature, stress, and shape development during the
continuous casting of steel, both in and below the mold. The model simulates a transverse section of the strand in generalized
plane strain as it moves down at the casting speed. It includes the effects of heat conduction, solidification, nonuniform
superheat dissipation due to turbulent fluid flow, mutual dependence of the heat transfer and shrinkage on the size of the
interfacial gap, the taper of the mold wall, and the thermal distortion of the mold. The stress model features an elastic-viscoplastic
creep constitutive equation that accounts for the different responses of the liquid, semisolid, delta-ferrite, and austenite
phases. Functions depending on temperature and composition are employed for properties such as thermal linear expansion. A
contact algorithm is used to prevent penetration of the shell into the mold wall due to the internal liquid pressure. An efficient
two-step algorithm is used to integrate these highly nonlinear equations. The model is validated with an analytical solution
for both temperature and stress in a solidifying slab. It is applied to simulate continuous casting of a 120 mm billet and
compares favorably with plant measurements of mold wall temperature, total heat removal, and shell thickness, including thinning
of the corner. The model is ready to investigate issues in continuous casting such as mold taper optimization, minimum shell
thickness to avoid breakouts, and maximum casting speed to avoid hot-tear crack formation due to submold bulging. 相似文献