共查询到19条相似文献,搜索用时 113 毫秒
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为解决半钢炼钢条件下的氧枪粘枪问题,研制了新型大锥度锥体氧枪用于半钢炼钢,同时设计了新型5孔喷头替代原有4孔喷头以配合锥体氧枪的使用。通过进行阶段性的工业实践,新设计的5孔锥体氧枪具备了化渣快、吹炼过程平稳、粘渣后能够自行脱落等特点,很好地解决了氧枪粘枪问题,同时氧枪喷头寿命也有大幅度提高。 相似文献
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为减少或避免氧枪粘枪情况的发生,提高氧枪寿命,本钢炼钢厂采用锥体氧枪进行生产,实际生产情况表明喷头寿命可增加50%,氧枪枪管寿命可增加10%,锥枪枪体可满足氮、氧、水等介质参数要求,粘渣后基本可自行脱落,较直枪生产安全性更高,并且成本效益可观。 相似文献
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对φ245氧枪枪身粘渣原因的分析,研究制造了锥体氧枪,减少氧枪枪身的粘渣,延长氧枪寿命,稳定了氧枪冶炼操作,减轻了工人的劳动强度,提高了生产效率。 相似文献
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济钢120t转炉倒锥度氧枪的研制与应用 总被引:1,自引:1,他引:0
为解决直筒氧枪粘钢难处理、氧枪寿命低的问题,研制开发出了下部中管和外管同时采用倒锥度的倒锥度氧枪。应用表明,该氧枪枪体冷却效果好,粘渣能自动掉落,粘钢容易处理,平均枪龄可达312炉。 相似文献
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烟台鲁宝有色合金厂与莱钢共同设计的“转炉锥体涂镀氧枪”,于1999年5月顺利宠成整枪的生产。这支氧枪的设计主要针对顶吹氧气转炉炼钢中普遍存在的氧枪粘渣严重、被迫割枪、换枪频繁、枪龄很低等问题。该枪的设计特点是枪体带有锥度,同时锥管外表面具有防粘枪、耐高温的涂镀层、高质量的表成涂镀技术。我厂采用先进技术、使用专用设备加工生产出不同锥度、不同直径的大长度锥管和锥管表面涂镀技术。锥体涂镀氧枪具有不易粘渣的优点,可大幅度提高氧枪的寿命和转炉作业率。在转炉炼钢广泛采用溅渣护炉的条件下,具有广阔的推广前景。… 相似文献
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氧枪结渣粘钢严重时,刮渣器刮渣很困难.针对这一现象,在实验的基础上进行了转炉氧枪保护涂料喷涂系统的设计.现场试验表明,该系统能将涂料均匀地喷涂在氧枪上,且工作可靠、操作简单,故障率低;经喷涂保护涂料后,氧枪的使用寿命提高了1.35倍. 相似文献
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Ming Lv Rong Zhu Ya-Guang Guo Yong-Wei Wang 《Metallurgical and Materials Transactions B》2013,44(6):1560-1571
The basic oxygen furnace (BOF) smelting process consists of different chemical reactions among oxygen, slag, and molten steel, which engenders a vigorous stirring process to promote slagging, dephosphorization, decarbonization, heating of molten steel, and homogenization of steel composition and temperature. Therefore, the oxygen flow rate, lance height, and slag thickness vary during the smelting process. This simulation demonstrated a three-dimensional mathematical model for a 100 t converter applying four-hole supersonic oxygen lance and simulated the effect of oxygen flow rate, lance height, and slag thickness on the flow of molten bath. It is found that as the oxygen flow rate increases, the impact area and depth increases, which increases the flow speed in the molten bath and decreases the area of dead zone. Low oxygen lance height benefits the increase of impact depth and accelerates the flow speed of liquid steel on the surface of the bath, while high oxygen lance height benefits the increase of impact area, thereafter enhances the uniform distribution of radial velocity in the molten steel and increases the flow velocity of molten steel at the bottom of furnace hearth. As the slag thickness increases, the diameter of impinging cavity on the slag and steel surface decreases. The radial velocity of liquid steel in the molten bath is well distributed when the jet flow impact on the slag layer increases. 相似文献
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In this study, the numerical simulations were carried out to analyse the structure of the oxygen lance nozzle, the flow conditions of oxygen and the flow status of molten steel in the converter. Through the quantitative comparison of the mixing time of the bath under different angles of oxygen lance nozzle, the angle parameter of the oxygen lance nozzle is finalised to be 16°. There are significant improvements on the industrial applications of optimised oxygen lance 536-16, in which the average time of early slag formed is decreased from 5.25 to 4.1 min, the rate of dephosphorisation is increased from 80.02 to 82.49%, the life of oxygen lance is raised from 428 heats to 800 heats, and all technical-and-economic indexes are improved. 相似文献
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本文研究了现代电弧炉炼钢过程的冶金物理化学变化。研究表明钢水中铁、磷、碳与氧枪吹入的氧气发生直接氧化反应,而钢水中的溶解氧无氧化能力、渣中氧化铁无脱磷能力;钢水中碳与氧气的反应最为剧烈,可通过调整配碳量与吹氧强度可对其它各反应进行控制。在实际生产熔炼过程中,通过及时加入碳粉、焦炭或石墨块,还原渣中氧化铁,可以提高钢水收得率。冶炼过程化清后,通过强化吹氧至接近终点氧,减缓升温速度,流渣换渣,可以深度脱磷,并有效抑制“回磷”。 相似文献
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针对气化室喷枪纯喷颗粒镁铁水脱硫普遍存在的问题,从脱硫工艺、喷枪结构、扒渣工艺、气化室粘渣清理维护与喷枪长寿命5个方面,介绍武钢的技术进步与实际应用效果。 相似文献