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在电弧炉中用废钢有效地生产着优质钢。炼钢者所面临的主要问题,是供货短缺、价格波动,以及废钢质量的极其参差不一。另外,在废钢中存在着错配元素,对于生产高级的优质钢来说,这是非常不尽人意的。本文从不同的角度讨论了用海绵铁部分地、乃至全部地取代废钢的问题,强调在电弧炉炼钢中使用海绵铁时,加料系统、冶炼工艺对电弧炉性能和产品特性的影响。由于包括错配金属元素在内的不需要的夹杂物含量很低,对于生产优质钢来说, 相似文献
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电弧炉用海绵铁(DRI)炼钢的工业性试验 总被引:1,自引:0,他引:1
随着科学技术的进步,对钢铁产品,特别是特钢产品提出了越来越苛刻的质量要求。就化学成分而言,从一般优质钢到纯净钢、超纯净钢,对常存元素(C、Mn、Si、P、S),残余元素(Ni、Cr、Cu),五害元素(Ph、As、Sn、Sb、Bi)的分量、合量均已隐含提出,参考性提出或明确提出严 相似文献
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1997年7月,我公司对二炼钢3座20t的普通电炉进行了EBT改造,同时匹配了1台LF精炼炉和1台四机四流小方坯弧形连铸机。结果取得了良好的技经效果。 相似文献
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废钢铁和海绵铁产业的建设对电炉钢发展的影响 总被引:3,自引:1,他引:2
1电弧炉炼钢业的发展50年代以前平炉是主要的炼钢设备,1951年奥地利发明了氧气预吹转炉,50年代中期首先被日本、德国等接受,接着是美国。我国及苏联、东欧直到60年代初才准备采用。70年代转炉钢逐渐超过平炉钢。经过50~70年代转炉钢的迅猛发展,今天已达到鼎盛时期,平炉钢 相似文献
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在30吨UHP电炉的不同部位应用不同的耐火材料,从而达到提高炉衬寿命,降低耐材消耗的目的。 相似文献
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电弧炉用废钢预热技术 总被引:2,自引:0,他引:2
为了提高电炉炼钢的生产率并降低其生产成本,已进行了大量有效的工艺和设备改善,如高功率化、大容量化富氧操作;采用氧燃烧咀和EBT(偏心炉底出钢)技术;进行炉外精炼及采用DC(直流)电弧炉等.而近几年,如何减少电炉排出的废热,特别是利用其高温废气预热废钢则成了重点.下面简介当今多种主要的废钢预热技术. 相似文献
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丁于 《上海宝钢工程设计》2002,16(3):8-22
在电弧炉炼钢领域,组合式废钢预热技术的最新发展,是德国FUCHS公司所开发的手指式竖炉电弧炉。本文叙述了手指式竖炉电弧炉的概况,对其的特点进行了分析,并对其的发展趋势指出了看法。 相似文献
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电弧炉兑铁水冶炼工艺的试验研究 总被引:5,自引:0,他引:5
在180kVA实验型直流电弧炉上进行了兑入0~50%铁水冶炼工艺的试验研究。结果表明,每加入10%的铁水可使冶炼时间缩短为7%,电耗降低6%吨钢氧气消耗量应随铁水比例的增加而增加,当铁水比例为3%时适宜值为25m^3/t在高碳范围内熔池脱碳反应速度与供氧强度和氧气利用率成正比,而提高吹氧压力可以提高氧气利用率,在本试验条件下高碳范围内脱碳速度大于0.1%/min明显高于传统电炉,另外,兑铁水方法不 相似文献
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J. Pal S. Ghosh M. C. Goswami D. P. Singh Manoj Kumar R. K. Minj A. K. Upadhyay 《国际钢铁研究》2007,78(8):588-594
Electric arc furnace steel contains about 70‐120 ppm nitrogen. There is no suitable method for nitrogen removal from electric arc furnace steel up to the level desired for good quality bars and flat rolled products (30 ppm max). The existing process based on vacuum degassing can remove only up to 20% of nitrogen in steel. In the present study DRI fines have been injected into a steel bath which can drift out nitrogen in steel through production of fine CO bubbles in‐situ on reaction with residual FeO in DRI fines and C in bath. For high and medium carbon steel, nitrogen got reduced to 30 ppm and 60 ppm respectively where initial nitrogen was 150 – 200 ppm in steel. Nitrogen removal also depends upon bath depth and addition level of DRI. 相似文献
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UnalCamdali MuratTunc 《钢铁研究学报(英文版)》2005,12(3):11-13
A mass balance analysis was undertaken for liquid steel production using a computer program specially developed for the AC electric arc furnace at an important alloy steel producer in Turkey. The data obtained by using the computer program were found to be very close to the actual production ones. 相似文献
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Mass Balance Modeling for Electric Arc Furnace and Ladle Furnace System in Steelmaking Facility in Turkey 总被引:2,自引:0,他引:2
In the electric arc furnace (EAF) steel production processes, scrap steel is principally used as a raw material instead of iron ore. In the steelmaking process with EAF, scrap is first melted in the furnace and then the desired chemical composition of the steel can be obtained in a special furnace such as ladle furnace (LF). This kind of furnace process is used for the secondary refining of alloy steel. LF furnace offers strong heating fluxes and enables precise temperature control, thereby allowing for the addition of desired amounts of various alloying elements. It also provides outstanding desulfurization at high temperature treatment by reducing molten steel fluxes and removing deoxidation products. Elemental analysis with mass balance modeling is important to know the precise amount of required alloys for the LF input with respect to scrap composition. In present study, chemical reactions with mass conservation law in EAF and LF were modeled altogether as a whole system and chemical compositions of the final steel alloy output can be obtained precisely according to different scrap compositions, alloying elements ratios, and other input amounts. Besides, it was found that the mass efficiency for iron element in the system is 9593%. These efficiencies are calculated for all input elements as 845% for C, 3031% for Si, 4636% for Mn, 3064% for P, 4196% for S, and 6979% for Cr, etc. These efficiencies provide valuable ideas about the amount of the input materials that are vanished or combusted for 100 kg of each of the input materials in the EAF and LF system. 相似文献