影响高炉炉墙热负荷的因素分析

应用传热学原理建立了高炉炉墙温度场数学模型,应用数值模拟方法分析了冷却水管直径和间距、冷却水管至冷却壁热面的距离,镶砖导热系数、镶砖厚度和面积,炉衬厚度,渣铁凝固层厚度及对流换热系数对炉墙热负荷的影响.结果认为,降低炉墙热阻是增大炉墙热负荷的重要途径.     

长寿高炉冷却器布置方式的计算传热学分析

应用计算传热学研究了目前常用的一些高炉冷却器的温度场．通过模拟在高炉内部不同高度处铜冷却壁、凸台冷却壁及板壁结合冷却系统的温度场,探讨了不同冷却器在高炉炉墙的布置方式．凸台冷却壁适宜安装在炉身上部和炉喉区;板壁结合冷却器适宜安装在炉身中部及炉腰部位;铜冷却壁适宜安装在炉腹及炉身下部．     

南钢高炉的炉墙结厚和结瘤

对南钢高炉的炉墙结厚与结瘤的原因进行了分析,并提出了预防炉墙结厚与结瘤的措施。     

间歇式炉炉墙传热的数学模拟

本文利用有限差分法和平均温度法计算了间隙式炉炉墙的温度分布,蓄热量及表面散热量。用上述两种方法对一层、二层、三层炉墙进行的计算表明:按平均温度法计算的蓄热量,由于没有考虑到炉墙内温度分布的非线性,比有限差分法计算的蓄热量要低;炉墙层数越多,两种方法计算的结果越接近;多层炉墙的各层有一个最佳厚度比例,使热损失(包括蓄热量和表面散热量)最小。     

鞍钢4号高炉炉墙结厚原因及解决措施

鞍钢4号高炉停炉大修更换炉缸耐材后,高炉出现炉墙结厚现象。通过对炉墙结厚原因进行分析,采取了加强原料质量管理、降低冷却强度和调整装料制度等措施,炉墙结厚得到有效处理,高炉炉况恢复正常。     

Transient Heat Transfer Analysis of Blast Furnace Cooling Staves

The capability of cooling staves is crucial for a long campaign life of blast furnaces (BF). Transient heat transfer analysis of blast furnace cooling staves made of copper, cast steel, and ductile cast iron are performed. Moreover, the temperature field variations of cooling staves according to different distributions of gas flow temperature are studied. A discussion of cooling staves made of the three different materials is given based on their performance during the transient heat transfer process. The results indicate that copper staves are suited for a long campaign life, as their performance is much better compared to cast steel and ductile cast iron staves especially during unsteady heat transfer. Moreover, the capacity of staves made of cast steel is better than that of ductile cast iron.     

高炉冷却壁非稳态传热热态实验分析

 冷却壁安全工作是保证高炉长寿的基础。通过设计并建造冷却壁热态实验炉,研究了高炉铸铁冷却壁热面无渣皮和有渣皮时的非稳态传热过程,考察了不同炉气温度条件下冷却壁热电偶温度的变化规律。回归得到了炉气在升温阶段、稳定阶段、降温阶段时冷却壁热电偶温度随时间的变化关系式。计算得出了冷却壁热面在有无渣皮条件下的平均热流强度,回归得出了炉气平均对流换热系数随炉温的变化关系。结果表明,冷却壁热面在有渣皮时热电偶温度的变化速率显著低于无渣皮时的变化速率,冷却壁破损的主要原因是冷却壁温度的反复变化和渣皮的频繁脱落而产生的热应力。     

高炉炉墙状况诊断及冷却壁状态在线检测系统开发与应用

介绍了济钢第一炼铁厂 6#高炉利用高炉冷却壁进出水温差实施炉体检测的装备配置和通过水温差及炉体热负荷间接判断炉墙结厚、渣皮脱落以及冷却壁状态诊断的应用情况。实践证明 ,该在线检测系统能及时发现冷却水管漏水、堵塞等故障 ,有利于延长冷却壁的寿命 ,且该系统软件界面友好、直观 ,对准确判断、分析高炉炉况有直接的帮助意义     

高炉冷却壁非稳态传热研究

研究了铸钢、球墨铸铁和纯铜3种不同材质高炉冷却壁的非稳态传热过程。考察当高炉煤气温度分别为指数型和周期型变化时,冷却壁壁体温度场的变化情况。并根据不同材质冷却壁在非稳态工作过程中的表现,讨论这3种冷却壁的性能优劣。结果证明,铜质冷却壁是理想的长寿冷却壁,其性能明显优于铸钢和球墨铸铁冷却壁,并且这种优势在非稳态传热过程中表现的更为突出。同时铸钢冷却壁优于球墨铸铁冷却壁。     

高炉内部气体流动与传热的模拟分析

分别建立了高炉内气体流动、传热的二维和一维数理模型,对高炉煤气流的流场、压力场和温度场进行了数值模拟,基于一维模拟温度结果预测了炉内气体成分变化,并分析了燃烧温度和鼓风速率对煤气流动及温度的影响。研究结果表明：简化的一维模型可适用于高炉煤气温度轴向变化的预测：鼓风速率和燃烧温度的变化影响软熔带的位置、炉内压力损失及炉顶煤气温度。在高炉实际操作中,合理的鼓风速率和燃烧温度是高炉炉况顺行的保障。     

八钢新区2500m~3 A号高炉热负荷管理实践

宝钢集团八钢公司A高炉使用砖壁合一的薄壁内衬结构。针对薄壁炉型的特点,对原料强化管理,对上下部调剂,优化布料模式,合理的分布煤气流,完善对热负荷的管理,针对A高炉冷却系统自身结构特点,合理调整冷却参数,高炉从开炉至今,取得了较为理想的技术参数指标。     

Monitoring Method for Blast Furnace Wall With Copper Staves

 A monitoring method that has been designed for the first time for blast furnace wall with copper staves manufactured in China was introduced. Combining the method of “inverse problem” and the concept “non inverse problem”, the monitoring program for blast furnace wall with copper staves has been realized, which can be used to calculate online the accretion thickness and temperature of hot surface of copper staves after obtaining the values of thermocouples of copper staves. The accretion state obtained in the actual investigation has proved that the result of the program is correct. The monitoring program shows that the accretion would easily fluctuate when the accretion layer is extremely thick or thin, thereby the stable and smooth operation of the blast furnace is hindered. By maintaining appropriate accretion thickness, both long campaigns and high productivity of the blast furnace can be achieved; furthermore, it can also optimize the operation of blast furnace and maximize its production. Approximately 30-50 mm in thickness of accretion layer is maintained on the wall of Shougang blast furnace 2, which can meet the requirement for obtaining both long campaign and high productivity.     

新钢10号高炉冷却壁漏水治理实践

通过对新钢10号高炉炉缸四段冷却壁漏水的原因进行分析,发现热应力是导致冷却壁水管剪断的主要原因。采用U型透明管检漏及冷却壁穿管修复技术后,冷却壁漏水现象明显改善。