高炉炉料运动过程数学模型的建立及其数值模拟

建立了高炉炉料一维非线性动力学数学模型,通过对其进行归一化处理,得到了反映煤气粘性力、炉墙摩擦力、渣水及铁水浮力等对炉料运动影响的６个准数．用该简化模型可得到与其它模型相同的结果．应用该模型计算了不同孔隙度炉料相应的临界煤气流速度和临界压力．研究了实际煤气流速度与临界煤气流速度之差对炉料运动过程的影响,给出了控制炉料稳定顺行的煤气流速度．     

低热值高炉煤气在预热空气作用下的扩散燃烧特性

本研究以某钢铁企业高炉煤气回收水冷系统为对象,分析研究了低热值高炉煤气与不同预热温度空气的同轴扩散气流在绝热炉膛内混合和燃烧的特点,建立了κ-ε双方程燃烧数学模型,并对其同轴扩散气流燃烧特性进行了模拟研究.研究结果表明:空气预热温度的升高能够有效促进化学反应活性较差的CO参与燃烧反应,同时CO化学反应速度也得到有效提高...     

ELECTRICAL ANALOG OF PNEUMATIC PHENOMINA IN BLAST FURNACE

本文阐述电模拟相似原理及其数学方程,以电阻纸制作模型,用电流场来研究高炉内气流场各参数,为炼铁生产和各种炉型设计提供数据,并已在实际生产中得到初步应用。此方法,还可以用来研究热传导及水力学等课题。     

竖炉风口回旋区简化模型的研究

讨论了文献中从实际高炉的研究和解剖试验得出的回旋区计算关系和数学模型。基于回旋区边界上力的平衡,并考虑理论燃烧温度和有效直径等的影响,建立了同类型竖炉风口回旋区的简化模型。     

铸造混合炉温度控制技术

针对铝电解铸造混合炉炉温难以恒定控制，导致铝液配料不均等问题，结合生产实际，采用KX—C智能温控仪和PLC相结合的控制系统，准确地测出混合炉内铝液的温度，并根据设定温度控制天燃气的流量和点燃喷头的组数，确保混合炉炉温能保持在生产所需的恒定温度，以此来提高配料精度。     

Blast Furnace Operations With Injected Coal at Weirton

Coal has been used as an auxiliary blast furnace fuel on the Weirton No. 3 blast furnace. Serious tuyere failure problems have been encountered, and they must be overcome before coal injection will receive widespread application. Coal has been injected into the No. 3 blast furnace at rates up to 15% of total fuel requirement. If operating practice differences are neglected, the coal to coke replacement ratio at the 10% coal injection rate was 0.94 and at 15% coal injection rate was 1.19.     

A STUDY ON PATTERN AND DISTRIBUTION OF GAS FLOW IN RACEWAY AND LOWER PART OF BLAST FURNACE

作者研究了冷态模型中模拟风口回旋区气流的流动结构,由此确定了一个重要的影响高炉气流分布的边界条件。发现在风口回旋区有一个由环流包围的限制流动型的中心射流流股。在电子计算机上对流函数的Laplace方程和矢量化的Ergun方程导出的流函数方程进行有限差分解法,得到了一些流线图,从而研究了高炉下部的气流分布及影响因素。计算表明高炉下部气流分布与回旋区的流动结构有密切的关系,这些结论对研究和控制高炉过程有一定参考价值。     

高炉风口回旋区三维数学模型

建立了高炉风口回旋区气体运动，温度分布和物质传输的三维数学模型，用它预报生产高炉回旋区内速度场，温度场和浓度场。     

小流量、低压力燃气炉温度控制系统的设计与应用

介绍了一种简易、适用的配比调节方案和在燃气炉上的应用实例 ,较好地解决了小流量、低压力燃气炉的温度控制难题 ,为在供能环境不好的条件下燃气炉的正常运行提供了有效途径。     

Coke properties at tuyere level in blast furnace with pulverized coal injection

Coke in the blast furnace experiences great changes in their properties during the blast furnace operation. Pulverized Coal Injection (PCI) into the blast furnace through tuyeres together with oxygen enrichment affect coke properties and blast furnace operation. Using coke sampler at tuyere level, coke samples were collected and analysed at various coal injection rates in the both conventional and co-axial oxygen enrichment. With the help of information obtained from coke sampling experiments, gas permeability resistance index at lower part of blast furnace (LK) and mean size variation of coke were predicted and matched well with the measurements.     

河钢塞尔维亚钢厂高炉煤气双蓄热加热炉的技术特点

介绍了河钢塞尔维亚斯梅带雷沃钢厂新建3~(#)双蓄热式加热炉的技术特点。其采用高炉煤气替代天然气,降低了燃料成本;通过合理的燃料配比及烟气反吹燃烧等技术的应用,解决了蓄热式加热炉NO_x和CO超标排放的问题;此外,该加热炉还采用了汽化冷却、均热段倾斜式炉底和排渣孔等技术,以及一级和二级控制技术,提高了加热炉的经济效益和操作便利性。     

高炉铸钢冷却壁传热和结构的影响因素分析

运用有限元软件ANSYS，建立高炉铸钢冷却壁传热数学模型，并对模型的稳态工况进行仿真计算。同时根据计算结果，讨论了冷却水管水垢厚度、气隙层厚度和炉渣厚度三因素对高炉铸钢冷却壁的温度场和热应力的影响。结果表明，这三个因素对冷却壁的性能都具有很大的影响，在冷却壁的设计和高炉操作中必须引起重视。     

THE MECHANISM OF HANGING IN THE BLAST FURNACE

经过修正的Janssen公式能表达竖炉中炉料运动及气流阻力对料柱压力的影响,但不足说明悬料的原因。高炉悬料的力学机理是:在全炉平均气流速度和平均压差不很高的条件下,料柱中局部透气性恶化的料层的压差在气流速度高于临界流态化速度时,产生向上作用的局部超失重力;当此超失重力接近或大于上部料柱的压力时即产生悬料。这种悬料在均一散料柱中是不可能出现的。从这一机理出发,得出防止悬料和强化高炉冶炼所应采取的措施。     

Mathematical modeling of the burden distribution in the blast furnace shaft

Process efficiency in the blast furnace is influenced by the gas flow pattern, which is dictated by the burden profile. Therefore, it is important to control the burden distribution so as to achieve reasonable gas flow in the blast furnace operation. Additionally, the charging pattern selection is important as it affects the burden trajectory and stock profile. For analysis of the burden distribution, a new analysis model was developed by use of the spreadsheet program, Microsoft® Office Excel, based on visual basic. This model is composed of the falling burden trajectory and a stock model. The burden trajectory is determined by the burden type, batch weight, rotating velocity of the chute, tilting angle, and friction coefficient. After falling, stock lines are formed by the angle of repose, which is affected by the burden trajectory and the falling velocity. The mathematical formulas for developing this model were modified by a scaled model experiment and DEM simulation.     

Blast Furnace Injections

This paper describes methods of calculation, which give the conditions to be fulfilled in order to tap the same quality of iron and have a smooth running furnace when a new matericd is injected into the blast. These calculations also show the effects of the injection upon the regularity of the iron, the production of the furnace, the coke rate, and the quality of gas produced. Included in the paper are the results of two industrial campaigns: one with natural gas and the other with light fuel oil.     

本钢七号高炉大矿批的研究及应用

七号高炉采取大α角、大矿角布料,在稳定焦批创造稳定的焦炭平台的同时,通过中心加焦保证了中心气流的发展,实行大矿批生产,提高了煤气利用,提高了冶炼强度,降低了燃料比。目前七号高炉的利用系数达到了2.350t/(m3·d),焦比降低到340kg/t,燃料比降低到523kg/t,同时减少设备损耗,降低设备休风率,实现了大矿批生产节耗、增产的目标。     

φ25m环形加热炉设计及运行简析

从环形加热炉中径的确定、炉衬的设计、供热分配和排烟等方面介绍了φ25m高焦混合煤气环形加热炉的设计情况,并对运行初期供热系统的测量数据作了简要分析.该环形加热炉投产后使用近3年的情况表明,该环形加热炉的整体设计合理,运行情况较为理想,各项指标均达到要求.     

On-line computer control for the blast furnace

The initial work done by IRSID (Institut de Recherches de la Sidérurgie Francaise) toward online computer control of the blast furnace was described in Part I of this article, appearing in the January issue of Journal of Metals. An account was given of how a mathematical model of the blast furnace was developed, and a method of continuously controlling the thermal balance of furnace operations was defined in terms of this model. Part II outlines the results obtained thus far from the application of this theoretical approach to two actual blast-furnace operations: one using 100% self-fluxing sinter, and the other using a burden of ore and sinter.     

加热炉燃烧模糊控制系统及其应用

针对唐钢高速线材厂加热炉采用重油、转炉煤气、高炉煤气混烧的特殊情况，采用模糊控制理论和传统的PID控制相结合的控制思想来实现加热炉的燃烧自动控制。应用实践表明，炉况稳定，加热质量好，经济效益显著。     

Pelletizing in shaft furnaces

Another line of development for the agglomeration of ores and concentrates is the shaft furnace. For very fine ores, this process offers advantages in fuel economy and low capital installation cost, while continuing to produce a high quality blast furnace material.