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应用音平化渣图象分析和指导转炉造渣操作 总被引:3,自引:1,他引:2
利用音平化渣图象可以清晰地看出在转炉造渣过程中何时发生喷溅,何时发生炉渣返干和何时化渣正常。应用音平化渣图象和炉渣三元相图,可以正确地分析发生喷溅和返干的原因,从而找到避免突发性喷溅和严重返干的方法。正确的枪位和炉渣碱度控制是实现平稳吹炼的保证,而音平化渣图象能帮助操作工实现这一目标。 相似文献
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对梅钢250吨转炉氧枪喷头损毁进行原因分析,优化了氧枪喷头的设计参数,将原6孔喷头优化为“5+1”孔喷头,进行了生产实践.转炉冶炼过程的喷溅和返干情况得到显著改善,喷溅渣量减少;氧枪喷头漏水问题得到有效解决,喷头使用寿命提高;转炉冶炼指标得到显著改善. 相似文献
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氧气转炉用声纳微机监控造渣技术的工业性试验 总被引:2,自引:0,他引:2
本文介绍了上海工业大学和马鞍山钢铁公司合作研制成功的转炉声纳化渣仪及该仪器在中磷铁水冶炼中、低碳钢中的应用情况。通过采集炉内音强信息,该仪器能自动设置炉渣喷溅和返干预警线及最佳化渣区域,显示枪位和副原料加入制度等等,以指导工人操作;能提前5~10S预报喷溅和返干,预报命中率分别为86.7%和94.6%。该仪器的使用为马钢中磷铁水的冶炼提供了有效手段,大大提高了工人的操作水平,有效避免喷溅的发生,使消耗降低,吹损减少了0.43%,取得了良好的经济效益。 相似文献
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氧枪是转炉炼钢的重要设备,是向炉内供氧的主要工具,在转炉冶炼过程中,经常会出现氧枪黏钢的现象。对莱钢90t顶底复吹转炉氧枪黏钢的原因进行了分析,从喷溅控制、枪位控制、炉渣碱度等方面查找原因,通过控制低温喷溅、高温喷溅,实施高-低-高-低枪位、低碱度冶炼等措施,达到全过程化渣;防止炉渣过泡或返干,保持炉渣碱度适中且流动性良好,保持稳定的炉底高度,及时测量液面高度并动态掌握枪位,从而减轻了氧枪黏钢,延长了氧枪使用寿命,提高了生产节奏。 相似文献
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Brahma Deo Aart Overbosch Bert Snoeijer Debasis Das Karumanchi Srinivas 《Transactions of the Indian Institute of Metals》2013,66(5-6):543-554
Decarburization, slag formation, foaming, and slopping in basic oxygen furnace (BOF) can now be partly understood, and to some extent predicted with the help of several on-line measurements and on-line control models. The principal reaction in BOF is decarburization. The bulk of the decarburization takes place in the turbulent region of jet impact irrespective of the fact whether the slag is solid, liquid or foamy. Metal droplets are ejected from the jet impact zone but it is difficult to distinguish the decarburization occurring in the bulk metal from that occurring in the droplets. Slag in BOF is heterogeneous and always contains some entrained gas bubbles and solid material (either un-dissolved or precipitated). At no stage the slag is 100 % liquid. A significant part of the metal droplets fall back and travel through the semi liquid slag. Through this mechanism the droplets can cause slag foaming and slopping in the BOF. Phenomenon of slag foaming and slopping can be monitored and controlled by following, dynamically, the audio signals, gas flow rate and composition, by tracking ‘Chaos’ in chemical reactions, by manipulating the chaotic attractors, and by monitoring the lance water temperature and weight. Relative stability potential (RSP) diagrams are found to be a good indicator of the dynamics of process inside the BOF and help in advance prediction of the impending chaos. 相似文献
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宝钢300t转炉音平控渣技术的开发与应用 总被引:3,自引:0,他引:3
简要介绍了音平控渣的基本原理 ,叙述了宝钢 30 0t转炉音平控渣技术的开发和应用情况 ,表明了音平控渣技术对提高转炉操作人员水平、减少喷溅具有的积极作用 相似文献
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介绍了转炉冶炼中的喷溅原因,分析了转炉喷溅对安全、生产、设备、消耗的影响,探讨了三安炼钢厂对抑制炉渣喷溅的措施与方法。对转炉使用泡沫渣抑制剂进行了探讨、实验,在生产实践中表明:优化枪位控制、加料时机控制、熔池温度控制、提高操作水平、正常合理使用泡沫渣抑制剂可以减少83%左右的喷溅,可以补吹不倒炉直接出钢并获得了较好的溅渣护炉效果,采用该技术工艺为三安创造了显著的经济效益和社会效益。 相似文献
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Various cavity modes (i.e. dimpling, splashing and penetrating) are important phenomena in estimating splashing in oxygen steelmaking. Though few studies in the literature have addressed this issue, no investigation can be found focusing on identifying modes by physical means. In the current work, sound produced in a cold air-water model was analysed to distinguish various cavity modes. Wave analysis showed that amplitude of sound increased as the mode changed from one to other. From spectrum analysis, it was found that between a certain range of frequencies, there was considerable difference in the sound level as the mode changed from splashing to penetrating. The presence of a second layer over the bath surface did not affect the general outcomes of the analysis. Present work indicates that it may be possible to identify cavity modes by analysing the sound produced from the bath. This would allow greater control of splashing in oxygen steelmaking and potentially help prevent slopping by controlling operation parameters of the process. 相似文献
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