Transient Temperature Analysis for Industrial AC Arc Furnace Bottom

Heat losses from the furnaces depend on the design and size. The surface heat loss from the bottom of an industrial AC electric arc furnace (EAF) possesses an important fraction of overall losses. So in this study the transient temperature variation at the bottom of the EAF was investigated. The transient temperature analysis was carried out using MATLAB computer program. T=T(r, t) for different bottom lining layers was depicted.     

全连铸电炉炼钢厂时间节奏的衔接匹配

全连铸电炉炼钢厂的多炉连浇问题实质是多工序的衔接匹配问题。为了实现电炉炼钢厂多炉连浇的目标,关键是要缩短电炉出钢—出钢时间,使之能与连铸机的时间节奏一致。通过研究提出：连铸机连浇炉数主要取决于电炉出钢—出钢时间与连铸机一包钢水浇注时间的差值,运用钢铁制造流程中的时间概念分析了多炉连浇规律     

废钢预热竖炉的开发与成效

利用电炉废气进行废钢预热是炼钢厂家长期以来以探求的目标，从能量成为严重的经济问题始起电炉炼钢者们就只有眼睁睁地着着大量的废余热量被毫无用途地丢允卓，如何将提高将料温度与综合节能结构起来已成为一个重要课题，而仅在最近几年这一目标才刚刚实现。     

电弧炉烟气余热利用系统的设计应用

莱钢50t电炉第4孔高温烟气原来直接排入环境除尘系统,造成能源浪费。通过对电弧炉第4孔移动烟道的改造,实现与新建燃烧沉降室和热管式余热锅炉的对接,将余热管锅炉收集高温烟气热量所产生的蒸汽储存在2台150m3蓄热器中,以满足VD真空精炼炉生产需求。烟气余热回收系统可提供压力1.6MPa饱和蒸汽15t/h,每年节约燃油消耗费用2256万元。     

现代炼钢流程冶炼工序的炉料结构研究

现代炼钢流程主要是转炉流程和电炉流程.在物料平衡和热平衡计算基础上,通过对冶炼周期的分析,指出电弧炉冶炼有一个最佳铁水比,转炉冶炼有一个最佳冷料比.对于安钢第一炼轧厂100 t烟道竖炉电弧炉最佳铁水比为31%,对于100 t转炉,冷料为全废钢条件下最佳冷料比为17%.     

衡钢电弧炉炼钢流程能量的多尺度研究

摘要： 在建立不同铁水比例下的能量平衡与物料平衡的基础上,利用多尺度方法分析研究衡阳华菱钢管有限公司电弧炉炼钢跨尺度全流程能量的状况,主要包括工位级节能技术研究、余热利用技术、工位级间相互的关系与电弧炉炼钢流程集成技术。实现了跨尺度全流程能量的集成,得出最优能耗的冶炼生产模式。     

底吹条件下电弧炉炼钢熔池的流体流动特性

电弧炉炼钢广泛采用底吹技术以强化熔池搅拌、加速冶金反应和提升产品质量.本文通过数值模拟和水模型实验研究了底吹条件下电弧炉炼钢熔池内流体流动特性, 分析了底吹流股对流体流动的影响作用规律.随底吹流量的增加, 熔池平均流动速度增加, 熔池内“死区”体积减小.同时结合工业生产实测数据, 发现电弧炉底吹技术的运用可通过强化熔池搅拌, 加快熔池内热量传递, 均匀熔池钢液温度, 有效加快炼钢熔池的热量传递和整体升温速率, 大大提高冶炼过程热量的利用效率.     

1.5t电弧炉改造

西宁特殊钢集团公司劳动服务公司金属加工厂，将1.5t电弧炉改造成3t电弧炉。没有增加过多设备而使产量提高，能耗降低，获得较大经济效益。     

电弧炉炼钢技术若干问题的实践与认识(2)

对电弧炉流程与转炉流程在成本、质量等方面的差异进行了对比分析.介绍了CoJet炉壁喷枪在宝钢的应用情况,还就电弧炉自动炼钢技术的应用与开发进行了介绍与讨论.最后讨论了与电弧炉流程有关的某些环保问题.     

现代电炉炼钢技术在莱钢超高功率电炉的应用实践

论述了强化用氧技术、热装铁水技术、电炉终点控制技术、泡沫渣技术、电炉烟气余热回收及净化技术等现代化电炉炼钢技术在莱钢超高功率电炉的应用情况及取得的实际效果。     

中国电炉炼钢的技术进步

 总结了建国70年来中国电炉炼钢的发展历程,特别是改革开放40年来电炉工艺技术的进展,分析了电炉钢比例先升后降的原因。阐述了废钢和电力对电炉钢成本的影响以及电炉短流程对钢铁工业结构调整和高质量发展的影响等,对世界主流电炉炉型在中国的应用进行了归纳,同时总结了电炉炼钢工艺技术的创新和装备发展情况,指出了电炉炼钢未来的发展趋势。     

Development of the process of electric steel production and methods for improving the technical-and-economic indices of electric arc furnaces

The structure of the metal losses during melting of a low-carbon semiproduct in EAF is analyzed. It is shown that a further increase in the capacity of a modern superpower EAF can degrade the technical-and-economic indices of its operation. The increase in the metal losses in melting in EAF is caused by a high oxygen flow rate and a number of other technological factors. The rational methods of increasing the technical-and-economic indices of EAF are a decrease in the metal losses in melting and processing of the semiproduct, a decrease in the primary energy consumption, and the recycling of dust and waste slags.     

电弧炉炼钢提高生产率的技术进展

近几年来,电弧炉炼钢生产率有较大的提高。提高电弧炉炼钢生产率主要基于以下几项新技术,包括改善电弧炉电效率、强化供氧技术、智能控制技术（专家系统）等。对国内外几座先进的电弧炉技术经济指标进行了比较。提高电弧炉生产率是今后电弧炉炼钢的发展方向。     

大型电炉污染物控制与减排

从电炉烟气净化系统、电炉钢渣处理及电炉含铁粉尘处理等几个方面论述了国内外电炉污染物控制及减排技术的发展及存在的问题,指出了我国电炉污染物控制及减排的发展方向.     

电弧炉炼钢技术进展

回顾了电弧炉炼钢发展的概况,讨论了中国电弧炉炼钢发展面临的主要问题和机遇,重点分析了电弧炉炼钢的工艺改进和高效化技术发展,并从高效率、高质量、低能耗、低排放、可持续发展的角度出发对电弧炉炼钢流程的工艺装备和技术发展给出了新总结,并提出了发展前瞻性建议。     

Steady State Heat Transfer of Ladle Furnace During Steel Production Process

The heat transfer analysis was performed for an industrial ladle furnace （LF） with a capacity of 55-57 t in Turkey. The heat losses by conduction, convection and radiation from outer and bottom surfaces, top and electrodes of LF were determined in detail. Finally, some suggestions about decreasing heat losses were presented.     

稀有金属真空熔炼熔速控制的研究

针对电弧炉的不稳定性和强耦合性问题,提出一种基于模糊控制真空自耗电弧炉熔速控制方法,通过对熔速控制系统模型分析与描述、对真空自耗电弧炉熔速控制策略分析以及对模糊控制理论的研究,实现对电弧炉熔速的稳定控制,从而保证真空自耗电弧炉的稳定性运行。     

Modeling,Simulation, and Validation with Measurements of a Heat Recovery Hot Gas Cooling Line for Electric Arc Furnaces

Waste heat recovery has a high potential for increasing the efficiency and sustainability of electric arc furnaces. In the present work, a dynamic model of a water cooled hot gas line is presented and validated with measurements of a newly installed electric arc furnace (EAF) with a waste heat recovery system. Due to necessary reconstruction work of the EAF, the cooling pass is upgraded to a heat recovery hot gas line. With hot water from the hot gas line saturated steam can be produced and fed into the existing steam net. The heart of the system is the water cooled hot gas line which is responsible for sufficient hot gas cooling on the one hand and adequate hot water generation for the steam generators on the other hand. The water cooled hot gas line is modeled in the commercial simulation software APROS and validated with measurements of the performance test during commissioning of the heat recovery plant. The simulation results are showing an excellent agreement to the measurements. The results embody that the model is both very reliable to estimate the transient behavior of the hot gas line and able to predict the operational process conditions.     

钢包精炼炉改造的实践和探讨

介绍了天津市轧三制钢有限公司(以下简称“轧三”)炼钢分厂将原来的12500kVA/30t电弧炉改造成6300kVA/40t LF钢包精炼炉的实践,论述了此种改造方案在中小型电炉厂电弧炉炼钢工艺配套改造中的可行性。     

电炉型式和设备选择

电炉炼钢近年发展的很快，尤其ＤＣ电炉炼钢成为一种新潮流，ＡＣ和ＤＣ炉型派生多种多样，因此要结合具体选择优良的电炉炉型，选用电炉设备要立足国内，若从国外引进要对比选择，二手电炉和翻新电炉技术水平低，一次投资省但生产成本高，得不偿失，不宜选用。