共查询到18条相似文献,搜索用时 109 毫秒
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高炉风口喂钛线是维护炉缸局部侵蚀部位的措施之一.采用数值模拟方法分析了喂钛线后炉缸铁水中钛化物的迁移规律,讨论了喂入位置对护炉效果的影响.计算结果表明:不同喂入位置条件下,钛化物的迁移路径和分布相差很大.当风口喂入位置距铁口较远时,钛化物在炉缸侧壁、炉缸底面上均有分布,有利于维护对应位置的炉缸侧壁、炉底侵蚀区域;喂线位置距铁口较近时,可维护炉缸侧壁区域,较难保护炉底部位.由此可见,应综合考虑侵蚀部位、铁口位置特点,选择最佳喂线护炉位置.模拟结果为生产实践所验证,表明数值模拟方法可作为选择护炉方式、优化喂线位置的参考依据. 相似文献
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针对萍钢3号高炉炉缸局部热流强度异常的情况,采取风口喂钛线护炉的措施后,水温差、热流强度有所下降,护炉取得了一定效果。 相似文献
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Vikram J. Kaku Michel C. Boufadel Albert D. Venosa 《Canadian Metallurgical Quarterly》2006,132(1):93-101
The evaluation of dispersant effectiveness used for oil spills is commonly done using tests conducted in laboratory flasks. The success of a test relies on replication of the conditions at sea. We used a hot wire anemometer to characterize the turbulence characteristics in the swirling flask (SF) and the baffled flask (BF), the latter is being considered by the Environmental Protection Agency to replace the prior. We used the measurements to compute the velocity gradient, G and the energy dissipation rate per unit mass, ε. The study shows that the mixing in the BF is more uniformly distributed than that in the SF. Flask average energy dissipation rates in the SF were about 2 orders of magnitude smaller than those in the BF. The sizes of the microscales in the BF were found to be much smaller than that in the SF. Also, in the BF, the sizes of the microscales approached the size of oil droplets observed at sea (50–400?μm), which means that the turbulence in the BF closely resembles the turbulence occurring at sea during breaking waves. Hence, the BF is preferable for dispersant testing in the laboratory. 相似文献
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用从美国引进的先进的速度测试仪器─—热线风速仪,对某炼铁厂3号高炉换热器前流道流场进行了冷态模型试验。试验结果表明:在高炉煤气换热器前流道中形成了较大的涡流区,且这涡流区是造成高炉换热器管束破损的主要原因。 相似文献
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炼铁厂5#高炉铁口部位的炉缸侵蚀严重,冷却壁热流高,采用传统的护炉方法效果不佳,经过积极探寻,找到了一种更有效的护炉方法——从风口喂钛精线护炉法,并取得了良好的护炉效果。 相似文献
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以实际生产高炉渣为原料,以铁尾矿为调质剂,采用测定熔渣黏度的方法确定调质高炉渣均质化过程,反映了铁尾矿的熔化、溶解和扩散的均匀化过程。并通过渣样中SiO2质量分数测定以及调质渣中矿相组成等方法验证了通过黏度测定调质高炉渣均质化的可行性。结果表明,同一酸度系数[Mk]下,调质高炉渣黏度随恒温时间的延长呈先下降后上升,最后趋于平稳的变化趋势;调质高炉渣均质化时间随铁尾矿添加量的增加而延长;当铁尾矿加入量大于15.88%时,调质高炉渣均质化时间显著延长;随着恒温时间进一步延长,试样上、中、下部SiO2质量分数趋于一致,而试样矿相组成与充分均质的调质矿渣一致,这说明通过黏度测定炉渣均质化的方法是可行的。中试试验证实,随着酸度系数的增加,纤维丝的直径增加,化学稳定性增强,纤维质量符合国家生产标准。 相似文献
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