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The reduction behavior of pellet was researched through the programming apparatus under simulated conditions of oxygen blast furnace(OBF)and traditional blast furnace(T-BF).The results indicated that compared with traditional blast furnace,the reduction starting temperature of pellet decreased by 60 ℃ under oxygen blast furnace condition.The reduction degree of pellet could almost reach 100% under oxygen blast furnace condition when the temperature reached 1 100 ℃,whereas it was only 82.49% in traditional blast furnace.The content of carbon in pellet of oxygen blast furnace was about 5times more than that of traditional blast furnace.In addition,the microstructure at the periphery and core of pellets after reaction was characterized by means of SEM and EDS. 相似文献
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《钢铁研究学报(英文版)》2016,(8):765-771
Mathematical models for burden descending process have been applied to obtain whole burden structures in blast furnace,whereas the accuracy of those burden descent models has not been sufficiently investigated.Special evaluation method based on timeline burden profiles was established to quantitatively evaluate the error between ex-perimental and modeled burden structures.Four existing burden descent models were utilized to describe the burden structure of a 1/20 scaled warm blast furnace.Input modeling conditions including initial burden profile,descending volumes in each time interval,and normalized descending velocity distribution were determined via special image pro-cessing technology.Modeled burden structures were evaluated combined with the published experimental data.It is found that all the models caught the main profile of the burden structure.Furthermore,the improved nonuniform de-scent model (Model IV)shows the highest level of precision especially when burden descends with unstable velocity distribution tendency.Meanwhile,the traditional nonuniform descent model (Model III)may also be desirable to model the burden descending process when the burden descending velocity presents a linear tendency.Finally,the uni-form descent model (Model I)might be the first option for roughly predicting burden structure. 相似文献
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生产实践中密闭鼓风炉富氧熔炼节焦的重要途径包括:选择合理渣型,稳定渣型,防止渣型经常波动;控制合理的脱硫率;用冶金焦替代土焦;减少烟气带走热量四方面,本文从这四个方面进行了论述。为降低密闭鼓风炉富氧熔炼焦耗提供了一定的参考。 相似文献
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根据高炉物料平衡和区域热平衡理论 ,参照高炉富氧喷煤和使用金属化炉料的冶炼结果 ,计算了炉料金属化率对富氧喷煤率、焦比和产量的影响。结果表明 :1炉料金属化率达到 40 %后 ,高炉不能富氧操作 ;2较低的炉料金属化率与富氧喷煤相结合 ,能够获得更大的喷煤比和更高的产量 ;3使用金属化率较高的炉料 ,能够比富氧喷煤达到更低的焦比 相似文献
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含钛高炉渣熔化性温度的试验研究 总被引:1,自引:0,他引:1
含钛高炉渣的熔化性温度是影响高炉炉渣冶金特性的关键因素。以工业生产含钛高炉渣为原料,进行正交试验研究,其结果表明:随着碱度的提高,熔化性温度上升,粘度也升高;MgO从6%增加到8%或8.5%时,熔化温度曲线温度转折点即熔化性温度从1 435℃降低到1 380℃;TiO2含量在16%~20%的条件下,渣中MgO在8%左右,Al2O3含量在9%~13%之间,TiO2对炉渣粘度与熔化性温度影响不大。 相似文献
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高炉炉料结构的研究及其优化配料数学模型的建立 总被引:1,自引:0,他引:1
以高炉炼铁工艺计算和高炉炉料结构理论为基础,结合在炉料结构方面的最新科研成果,建立一套高炉优化配料模型,并利用软件技术开发了相应的炉料数据库、专家数据库及其优化配料的数学模型,对宝钢高炉的配料数据进行验算,结果表明建立的模型是合理可行的.该模型能够快速得到满足其约束条件的优化配料方案,优化后配料方案的吨铁成本比实际生产采用的配料方案降低0.44%. 相似文献
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本文介绍了莱钢高炉原料冶金性能和合理炉料结构的试验结果以及利用该炉料结构的实际生产效果,并对高炉的竣工性能特征进行了分析。 相似文献
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介绍了济钢高炉鼓风机运行过程中的磨损问题,激光熔覆技术的特点,激光熔覆技术在高炉鼓风机转子修复中的应用。 相似文献
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从管网设计以及炼铁理论两方面对马钢一铁厂目前合理富氧量进行了论述,得出了该厂富氧率可提高到3.37%-3.59%,从而进一步提高产量,使高炉利用系数达到2.505t/m^3.d。 相似文献
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Qie Yana Lyu Qing Liu Xiaojie Li Jianpen Lan Chenchen Zhang Shuhui Yan Chaojie 《Metallurgical and Materials Transactions B》2018,49(5):2622-2632
Metallurgical and Materials Transactions B - The softening and melting reduction behaviors of ferrous burden in a gas-injection blast furnace (BF) have been investigated experimentally with the... 相似文献
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日本高炉炉料结构的新进展 总被引:4,自引:0,他引:4
介绍了日本高炉的座数逐步减少,而炉型却更加大型化.高炉炉料结构的特点是烧结矿比高且一直比较平稳,而球团矿比自1979年以后至今一直在下降,块矿比一直在上升.最后叙述了川崎制铁千叶6号高炉高比例块矿冶炼指标不够好及神户制钢神户3号高炉高比例球团矿冶炼指标不理想的情况. 相似文献
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莱钢2^#750m^3高炉中修时,停炉前采用大风量,加大出铁口角度,全程高压操作等措施以保证炉况顺行;空料线操作中确保炉顶打水均匀稳定,雾化良好,加强煤气尬发和料面的监测,严格上料程序,煤气放散,放渣等环节的操作控制,取得了良好的效果。 相似文献