共查询到19条相似文献,搜索用时 125 毫秒
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200t提钒复吹转炉氧枪喷头优化 总被引:1,自引:0,他引:1
针对攀钢西昌钢钒200 t提钒复吹转炉在底吹布置一定的条件下,通过优化顶吹氧枪喷头的结构来增加熔池搅混能力的问题,采用物理模拟的方法在顶吹流量一定的条件下优化了氧枪喷头尺寸参数(包括喷孔夹角、喷孔数和马赫数Ma),并进行了工业性应用。结果表明,反映熔池搅拌能的混匀时间随喷孔夹角减小先减小后增大,在喷孔夹角为12°时最小;反映熔池液面活跃度的1/3大波波高随喷孔夹角减小先增大后减小,在喷孔夹角为12°时最大。5孔喷头混匀时间比4孔减小1.88%,波高减小3.35%,熔池中死区增大。Ma数为2.10和2.20的喷头比Ma数为1.99的喷头混匀时间分别减小7.36%和14.31%,波高分别增加8.68%和14.57%。3种参数对熔池搅拌影响程度的排序为Ma数>喷孔夹角>喷头孔数,且在底吹流量低时更为显著。工业应用结果表明,底吹效果差时优化喷头(4孔喷孔夹角为12°,Ma数为2.10)的应用加强了熔池反应的动力学条件,使半钢残w([V])降低18.8%,残钒合格炉次(不大于0.05%)比例提升26.7%,钒渣w((V2O5))增加了6.5%,w((TFe)) 降低了6.6%,达到了良好的冶金效果。 相似文献
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针对攀钢二期提钒生产采用转炉法还是雾化法这个问题,本文基于攀钢的实际情况并结合国内有关提钒—炼钢工艺水平,对上述两种工艺进行了分析对比。分析认为,攀钢应当进一步完善雾化提钒,二期宜沿用雾化提钒工艺。 相似文献
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国内外氧气顶吹转炉提钒现状及对樊钢转炉提钒有关问题的探讨 总被引:2,自引:1,他引:1
介绍了国内外氧气顶吹转炉提钒的状况;对攀钢转炉提钒的几个技术问题如冷却制度供氧制度,造渣制度及终点控制等进行了探讨。 相似文献
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在生产条件下对承钢100 t转炉提钒的过程特征进行了研究。首先,测取承钢100 t转炉提钒冶炼的过程数据21炉,获得2 718项第一手实际生产数据。经统计分析,得到对熔池内元素成分变化的定量描述;进而对冶炼过程中钒元素和碳元素的选择性氧化进行了讨论。研究得到了转炉提钒冶炼过程中熔池内各元素的变化曲线、钒渣中V2O3的活度系数约为2.14×10-4、脱钒保碳临界温度在提钒冶炼过程中的变化曲线。对比转炉熔池实际温度的变化对承钢提钒冶炼现状进行了分析,进而提出了改进意见。 相似文献
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Stirring effects and impacting characteristics of conventional and various swirl‐type oxygen lances (Swirl angles are 5°, 10°, and 13°, respectively) on the molten pool were studied. The mixing time, impacting depth and impacting diameter were measured by water model experiment. The flow field characteristics of gas–liquid two phase flow were simulated using Fluent software. It is found that 10° swirl‐type oxygen lance injection can get the shortest mixing time which is only 47.6 s. The area surrounded by isovelocity is larger in molten pool when injecting by the swirl‐type oxygen lance. When injecting by the 10° swirl‐type oxygen lance, the area is the largest and the flow velocity of liquid steel is the highest. On this basis, the 10° swirl‐type oxygen lance was experimented in 150 t vanadium extraction converter. The experiment shows that the swirl‐type oxygen lance can guarantee the normal smelting process. Compared with the conventional oxygen lance, the reduction ratio of vanadium content in semi‐steel is 17.8%, vanadium extraction rate is increased by 5.1%, V2O5 grade of vanadium slag is increased by 0.93% and iron loss is reduced. It provides a new technology to improve the recovery of vanadium resources in converter. 相似文献
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《钢铁研究学报(英文版)》2011,(Z2):69-73
Powder injection is widely used in hot metal pretreatment. The kinetic analysis of refining process shows that the reagent utilization and pretreatment efficiency are determined by the penetration ratio of powder into metal, the residence time of powder in the metal bath, as well as the uniform mixing time of the bath. The characterization of these parameters is studied with water model experiment, and, a mathematical model is developed for hot-metal dephosphorization in torpedo car. Water-model experiment results and industrial data are used to determine the model parameters and verify this model, the results show that the prediction from the model agrees well with practical results. 相似文献
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决定铁水包喷粉脱硫效率的三个基本参数 总被引:5,自引:1,他引:4
熔池均混时间、粉剂穿透比和粉剂停留时间是决定铁水包喷粉脱硫效率的三个基本参数。通过实验考察了喷枪喷嘴结构不同和喷枪平面位置不同条件下吹气对熔池搅拌的影响 ;理论分析了影响单个粉剂穿越气 -液界面的主要因素 ,并得到在本实验粉剂粒度分布条件下理论粉剂穿透比的表达式。将实测粉剂穿透比与理论粉剂穿透比进行比较 ,提出了粉剂穿透比理论值的修正公式 ;利用流场计算结果 ,回归出了粉剂停留时间与载气流量和喷嘴离包底距离的关系 相似文献
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采用共存理论计算了提钒炉渣V_2O_3-SiO_2-TiO_2-Cr_2O_3-MgO-MnO-FeO中V_2O_3的活度系数,研究了炉渣组元、温度对V_2O_3活度系数的影响,得到V2O3的活度系数为0.5×10~(-6)~9.0×10~(-6)。通过对V-C平衡进行研究,得出了V-C氧化的转化温度为1380℃,即吹炼过程铁水控制温度。采用具备顶底复吹功能的500kg中频感应炉模拟了复吹转炉铁水提钒工艺,试验结果表明:吹炼终点钒质量分数平均为0.06%,钒氧化率为95%。底吹搅拌可以显著加速铁水中钒的氧化,缩短3min的冶炼周期。 相似文献
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