宝钢直流电弧炉系统的模型研究

在各种建模方法的基础上,参考电弧炉V-I特性曲线拟合法改进思路,对实际的直流电弧炉系统提出了详细的建模方案,并结合现场实际情况,建立了直流电弧具体模型。为验证模型准确度,对直流电弧炉系统进行了仿真分析。结果表明：建立的模型较好的模拟了实际的直流电弧炉系统运行,其模型误差度仅在5%左右,建模方案是有效的。     

炼钢系统交直流电弧炉的建模方法

简要介绍了直流电弧炉和交流电弧炉建模的几种方法。根据实际电弧炉的运行情况和建模时的具体要求．给出某一特定的电弧炉模型，使其尽可能与电炉的实际运行情况相符合。     

直流电弧炉与交流电弧炉的比较及发展概况

对直流与交流电弧炉的优缺点进行了比较。介绍了国外直流电弧炉技术的发展现状及国内最近引进的几座直流与交流电弧炉的概况，指出要辨证地看待直流电弧炉与交流电弧炉。     

电弧炉电弧特性与节电可行性分析

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。     

电弧炉模型分析与评价

对目前存在的电弧炉模型作了详尽的调查和分类,并对各种典型的模型方案进行了详实的分析和评价,指出了时域电压源模型是众多模型中行之有效的一种,最后对该模型今后的研究提出了可采取的措施。     

炼钢电弧炉过程动态模型与仿真

基于物料平衡和热平衡以及化学反应的热,动力学,结合相关的参数建立了电弧炉冶炼过程的动态模型。该模型可动态地模拟电弧炉冶炼过程中的废钢量,炉温,渣量,钢液成分,炉渣组成和炉气成分的变化,以某100t交流电弧炉冶炼的操作参数为例进行了仿真计算,并与现场数据作了对比,结果表明模型可与实际结果吻合得很好,完善后的模型可望对生产全过程作出动态的预报,并可综合评估电弧炉冶炼的能耗,物耗,生产效率等技术经济指标,从而为电弧炉工艺的改进,生产操作和控制提供指导。     

Heat Transfer Analysis for Industrial AC Electric Arc Furnace

The heat transfer analysis was performed for an AC electric arc furnace (EAF). Heat losses by conduction, convection and radiation from outer surface, roof, bottom and electrodes of EAF were determined in detail. Some suggestions about decreasing heat losses were presented.     

交流电弧炉对电压波动和闪变的影响

根据交流电弧炉(EAF)的工作特性,对抚顺特殊钢公司两台电弧炉产生的电压波动和闪变进行了预测,并阐述了将要采用的补偿措施。     

Fluid Flow and Heat Transfer Modeling of AC Arc in Ferrosilicon Submerged Arc Furnace

 arc has been developed and used to predict heat transfer from the arc to the molten bath in ferrosilicon AC submerged-arc furnace. In this model the time-dependent conservation equations for mass, momentum and energy in the specified domain of plasma zone have been solved numerically coupled with the Maxwell and Laplace equations for magnetic filed and electric potential respectively. A control volume based finite difference method was used to solve the governing equations in cylindrical coordinates. The reliability of the developed model was tested by comparison with the data available in the literature. The present model showed a better consistency with the data given in the literature because of solving the Maxwell and Laplace equations simultaneously for calculation of current density. Parametric studies were carried out to evaluate the effect of electrical current and arc length on flow field and temperature distribution within the arc. According to computed results, a lower power input lead to the higher arc efficiency.     

Computer Aided Mass Balance Analysis for AC Electric Arc Furnace Steelmaking

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.     

交流电弧精炼炉电极调节系统故障分析与处理

本文介绍了交流电弧炉电极调节系统的控制原理与组成,通过对几起电极调节系统的典型设备故障进行分析,提出了相关解决措施.     

Mass Balance Modeling for Electric Arc Furnace and Ladle Furnace System in Steelmaking Facility in Turkey

  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 9593%. These efficiencies are calculated for all input elements as 845% for C, 3031% for Si, 4636% for Mn, 3064% for P, 4196% for S, and 6979% 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.     

现代炼钢电炉电气特性与供电制度的设计

在一定设备条件下,供电制度合理与否,不但影响冶炼过程的顺利,还影响炉衬寿命、冶炼周期、电能消耗以及设备利用等。在分析炼钢电炉电气特性的基础上,绘出电炉理论电气特性曲线,介绍二次电压确定原则,并以“经济电流”概念,考虑到诸多相关因素,给出确定合理的供电制度方法。     

Fluid Flow Modeling of Arc Plasma and Bath Circulation in DC Electric Arc Furnace

 A mathematical model describing the flow field, heat transfer and the electromagnetic phenomenon in a DC electric arc furnace has been developed. First the governing equations in the arc plasma region are solved and the calculated results of heat transfer, current density and shear stresses on the anode surface are used as boundary conditions in a model of molten bath. Then a two dimensional time dependent model is used to describe the flow field and electromagnetic phenomenon in the molten bath. Moreover, the effect of bottom electrode diameter on the circulation of molten bath is studied.