共查询到20条相似文献,搜索用时 15 毫秒
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介绍了沙钢润忠90t竖式电弧炉热装铁水技术改造的情况。为实施铁水热装、解决炉料来源,建设了380m^3高炉,并且电弧炉、钢包炉及连铸机也作了相应改造,实现了增产、降耗、高质的目标。 相似文献
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中小型三相交流矿热炉存在严重的电气参数不平衡问题,导致冶炼过程炉况不稳、功率因数低、电耗高,难以实现冶炼过程三相熔池功率和温度场的平衡控制.以容量为12.5 MVA的三相交流硅锰炉为对象,在对其关键电气参数进行检测与计算的基础上,分析了三相短网不平衡、现有人工操作机制以及炉内变化所致不平衡对三相交流矿热炉电气特性的影响... 相似文献
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A. A. Nikolaev G. P. Kornilov A. V. Anufriev S. V. Pekhterev E. V. Povelitsa 《Steel in Translation》2014,44(4):289-297
Requirements on the systems controlling the electrical conditions of superpowerful arc furnaces in steel smelting are outlined. The basic principles for electrical optimization at different phases of smelting are considered. An improved mathematical model is proposed for analysis of the arc furnace’s electrical characteristics and the dynamics of the automatic control system governing electrode motion. A diagnostic system capable of identifying the phase of smelting on the basis of the harmonics of the arc currents shortens the furnace’s working cycle and reduces the power consumption. 相似文献
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为降低电弧炉炼钢生产成本,炉子的设计着重于最大限度地减少能量和电极的消耗,讨论了电弧炉供电系统的主要设计准则。 相似文献
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对天津钢管公司炼钢厂150t超高功率电弧炉实际生产过程中的电耗及其影响因素,进行回归分析找出了影响电耗的关键因素,并探讨了如何对此关键因素进行合理地控制。 相似文献
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《钢铁冶炼》2013,40(3):266-272
AbstractTrials were conducted on Co-Steel Lasco's electric arc furnace (EAF) to evaluate the effect of oxyfuel burner ratio changes on furnace energy efficiency and productivity. Carefully controlled trials with the collection of numerous process and sample data over 331 heats provided statistically significant results. The oxygen available for post-combustion in the furnace was increased by 19%. As the burners were operating at their maximum oxygen constraint, this was achieved by decreasing the natural gas consumption by 43%. Results of this study indicate that decreases in terms of specific electrical energy consumption (4·0%), power on time (5·0%), and tap to tap time (4·5%) were realised. Slag chemistry, electrode consumption, and yield were not affected. Measurement data support the finding that more heat was transferred into the steel with the post-combustion burners: a flat bath was achieved earlier; high bath temperatures were reached more quickly; power on time was reduced, leading to reduced electrical energy consumption. Analysis suggests that furnace thermal energy losses were reduced by less air inleakage, less incomplete methane combustion, and earlier achievement of foamy slag conditions. 相似文献
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电耗是电弧炉的重要技术指标之一,在当前发电行业背景下,降低电弧炉电耗具有显著的经济和环境效益。根据典型电弧炉企业生产数据,系统分析各项工艺参数与电耗之间的关系,并进一步评价了各种方法降低电耗的环境效益。结果表明,优化供电制度和强化供氧是具有良好环境效益的节电手段。对于连续加料电弧炉,天然气喷吹对降低电耗的作用被极大减弱,天然气消耗与电耗的相关系数为-1.13 kW·h/m3,其应用不利于CO2减排。尽管兑加铁水可以显著降低电耗,但是兑加40%(质量分数)铁水的连续加料电弧炉能耗和碳排放量分别是全废钢连续加料电弧炉的2.25和2.50倍,不利于推动钢铁工业节能减排工作。因此,降低电弧炉电耗需要通过增加电弧炉中化学能和物理热的供应及减少能量损失的手段来实现。 相似文献
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为了最优化修正电弧炉现场操作工艺,达到提高效率,降低电弧炉能耗的目的,分析了电弧炉的电弧特性以及电弧炉节电的可行性。 相似文献
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本文对为了降低电炉冶炼电耗,提高电炉变压器有功功率,减小无功损耗,取消了原意大利得兴公司设计的电炉电抗器,并对因取消电炉电抗器后电网系统参数发生变化,必须对现有35kV滤波装置进行技术改造,从理论到实际结果进行了全面分析. 相似文献
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攀成钢70 t高阻抗超高功率偏心底电弧炉的炉料为20%铁水+80%生铁-废钢。在电弧炉的炉壁上安有3支RCB集束喷枪装置和炉门两侧墙上安有两处喷碳粉枪。冶炼实践表明,吹氧脱碳速度达0.08%~0.012%C/min,冶炼电耗为310.86 kWh/t钢,电极消耗1.67 kg/t钢,氧气消耗46.7 m3/t钢,冶炼周期56 min。 相似文献
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超高功率电弧炉变压器容量及技术参数的确定 总被引:1,自引:0,他引:1
除电弧炉容量外 ,原料、辅助能源、冶炼品种、冶炼工艺和生产流程等生产状况均影响电弧炉变压器额定容量的确定。经分析得出以废钢为原料的超高功率电弧炉变压器额定容量Pn/kVA与吨钢电耗W、变压器功率利用率C2 、总通电时间ton、出钢量G之间的关系式为 :Pn=(W·G·60 )/(ton·cosφ·C2 ) ,同时给出了二次电压的确定方法。结合高阻抗技术 ,给出超高功率高阻抗电弧炉电抗容量与变压器技术参数的确定方法以及确定石墨电极二次导体截面积的思路 相似文献
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The changes in the parameters of a DSP-100 electric arc furnace that are induced by a decrease in the current frequency are considered. It is shown that the related decrease in the current lead resistances causes an increase in the arc power and voltage, a decrease in the reactive power, and an increase in the electrical efficiency and the power coefficient. The heat indices are expected to be significantly improved. 相似文献
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矿热炉低压无功补偿利弊分析 总被引:2,自引:1,他引:1
介绍了提高矿热炉功率因数的途径,论述了低压无功补偿关键技术参数,分析了矿热炉低压无功补偿方式的优缺点,指出合理选用低压无功补偿装置后,产品质量、产量、功率因数、单耗等指标均有明显的改善和提高,取得较好的经济效益。 相似文献