唐钢连铸坯热送热装实践

结合唐钢连铸坯热送热装工作实践，提出做好生产组织协调提高企业整体管理水平是热送热装工作的关键，多品种，批量生产是提高热送热装率的有利条件。     

沙钢2500m~3高炉热风炉改造实践

沙钢炼铁厂现有3座2 500 m3高炉,每座高炉配备3座内燃式热风炉,送风温度约1 180℃。为提高风温及现有热风炉改造做准备,决定每座高炉增加一座顶燃式热风炉。改造后,每座高炉配备4座热风炉,采用交叉并联的送风制度,送风温度1 250℃。     

攀钢全脱硫工艺探讨

针对攀钢伯水预脱硫处理工艺现状,就攀钢实现铁水全脱硫、满足全连铸需要,进行了组罐－脱硫－扒渣－提钒工艺流程试验。在组罐试验的基础上,结合攀钢实际提出了在攀钢实现铁水全脱硫的技术设想。     

酒钢1#高炉新增热风炉改造设计

新增热风炉采用改进型内燃式热风炉技术。根据热风炉各部位温度条件和受力状况选用不同性能的耐火材料并设计相应的砌体结构,热风管道采用更加稳固的结构形式,实现热风炉高风温、长寿命的目的。新增热风炉能满足在不影响高炉生产的情况下组织热风炉维修。     

八钢C高炉热风炉冬季保温技术研究与实践

八钢C高炉热风炉在冬季前施工完毕,很多外部条件不具备正常烘炉,为保证热风炉刚砌筑完的耐材质量,提出了一种新的防冻保温方案和采取一系列临时措施,热风炉内部采用了低温烘炉,烟气从冷风管道经倒流休风管排放,同时热风炉外部采用纤维毯保温措施,保证了热风炉炉壳整个冬季的温度控制在零度以上,为以后冬季施工的热风炉工程提出了新的保温方法。     

鞍钢热风炉高风温及节能技术

介绍了鞍钢高炉热风炉高风温及其相应节能技术的进步。重点叙述了鞍钢热风炉长期坚持使用低热值煤气烧炉的特点,开展了热风炉结构形式的改造和热风炉自预热、前置炉及辅助热风炉等根本性改造和对热风炉的多项综合节能技术的研究与应用,实现了热风温度大幅提高和热风炉烧炉煤气消耗的大幅降低,取得了良好的效果。     

鞍钢260t铁水脱硫扒渣生产实践

对鞍钢260 t铁水脱硫站的铁水温度条件、脱硫喷粉速率、脱硫喷枪插入深度以及扒渣工艺进行了优化,对铁水脱硫的控制方法及控制目标进行了介绍。采用镁基复合喷粉脱硫工艺,入转炉铁水硫可以达到0.002%～0.030%目标要求。通过铁水脱硫工艺与LF钢包精炼炉进行系统脱硫工艺控制,满足了中薄板坯连铸机的浇注要求,实现了全量钢水成品硫0.015%以下的低硫浇注,为稳定铸坯质量提供了保证。     

宁钢1号高炉热风炉大修设计特点及生产实践

宁钢1号高炉配置3座内燃式热风炉,自2009年以来进行了一系列修复工作,2012年起3号热风炉出现隔墙鼓包等现象,送风温度只能勉强维持在1 050 ℃。针对1高炉内燃式热风炉的种种问题,利用现有场地设计1座顶燃式热风炉,形成3座内燃式及1座顶燃式热风炉组,投运后最高送风风温提高80 ℃,燃料比降低20 kg/t,保证了1号高炉安全、稳定、经济地生产,也为单座热风炉故障处理或检修提供了保障。     

国内外热作模具钢的研究进展

介绍了国内外传统和新型热锻、热挤压和压铸用热作模具,以及特殊用途热作模具的钢种和特点;热作模具钢热处理和表面处理技术的研究进展。提高模具钢纯净度、均匀和细化组织,用计算机模拟技术开发热作模具钢新钢种是目前提高热作模具钢寿命的重要方法。     

铁水脱硫预处理技术在武钢的应用

简要介绍了武钢三座钢厂不同类型铁水脱硫处理的装置、工艺和效果；扩大铁水脱硫能力，显著增加铁水脱硫处理比，已具备年处理70万t以上的能力，可实现铁水全量脱硫处理；阐述了继续采用KR机械搅拌式脱硫装置的原因和选用纯镁脱硫剂的理由；分析了影响铁水脱硫效果和铁水回硫的因素及采取的相应对策。     

基于LM算法BP神经网络的高炉-转炉界面铁水温度预报模型

通过研究高炉-转炉界面铁水运输过程温度的主要影响因素,确定了影响高炉-转炉界面铁水运输过程温度的参数,建立了基于Levenberg-Marquardt (LM)算法BP神经网络的高炉-转炉界面铁水温度及铁水过程温降的预报模型.用沙钢100包铁水数据进行模型训练,50包铁水数据进行现场预报,结果表明:在高炉-转炉界面“一包到底”模式下,当绝对误差| X |≤20℃时,铁水温度命中率为94％,铁水温降命中率为78％;当绝对误差|X|≤40℃时,铁水温度命中率为100％,铁水温降命中率为92％,该预报模型能够满足现场实际生产需求,对炼钢生产有很好的指导意义.     

高硅铁水转炉吹炼实践

介绍了鞍钢股份有限公司鲅鱼圈钢铁分公司在铁水预处理工序对高硅铁水进行脱硅处理,在转炉工序使用高硅铁水进行转炉生产的实践。实践表明,在铁水预处理工序采用脱硅剂进行脱硅能有效降低铁水硅含量,在转炉工序通过调整操作制度,可以采用高硅铁水入转炉冶炼,实现了转炉和高炉生产同步。     

热轧窄带钢精轧机组中的活套自动控制

简述了对电动活套控制的要求、控制内容，对鸡西、锡兴、鄂城、涟源等热带轧机的配置进行了比较，并以涟源热带轧机为例，具体说明了控制系统的配置。     

Influences of taphole numbers on hot metal circumferential flow in blast furnace hearth

The circumferential flow of hot metal has a significant influence on the hearth erosion. Because the situation of the hearth is ??black box??, there is no direct examine method for the hot metal flow. Based on the computational fluid dynamics, the streamline and velocity were studied with different deadman conditions and different tapholes. The results show that when the hot metal tap with single or double tapholes (with the angle of 40??) and the deadman is at the sitting condition whose center is fine coke, the circulating hot metal is the most serious in the hearth. When the hot metal tap with double tapholes(with the obtuse angle), the circumferential flow of hot metal is weakened. The sitting deadman could strengthen the hot metal circulution. However, the floating deadman could weaken hot metal circulution, but it strengthens the hot metal flow of the bottom.     

热轧厂热送热装生产管理及工艺技术

介绍了热轧厂热送热装生产管理及工艺技术，包括以下几个部分：以工序时间为核心的生产计划编制系统、以控制时间为核心的动态热装轧制单位编制原则、一般热装条件下的热装加热工艺制订方法、加热炉自动化燃烧控制系统的应用、热装质量的实时反馈、提高板坯保温效果的原则。     

传统热连轧生产技术的发展

介绍了传统热连轧新技术,包括无头轧制技术、连铸板坯热送热装和直接轧制技术、铁素体轧制技术、热轧工艺润滑技术、自动化控制技术的特点.传统热连轧机分为粗轧和精轧两部分,使用的板坯厚度一般大于180 mm,最小产品厚度为1.2mm.近年来传统热连轧新技术、新装备的出现推动了炼钢一连铸一轧钢生产的一体化,加速了钢铁生产向连续化、低成本和高质量方向发展,扩大了传统热带轧机的轧制范围,可批量生产0.8mm的超薄带钢.先进的传统热连轧生产技术,是传统热连轧机组改造和发展关键.     

热等静压对铸件致密化及组织演变机理的影响研究

研究了铸件制品的热等静压致密化机理,分析了铸件制品热等静压的致密化模型,综合应用合金的蠕变理论和粉末冶金的烧结理论,利用现有的物理和数学模型对铸件在热等静压过程中的内部孔洞类缺陷闭合过程机理进行了阐述。确认了热等静压过程中起主要致密化作用的孔洞形变机制,为选择制定合适的热等静压工艺参数提供了理论参考。     

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.     

Hot Working of Zirconium Alloys: Some Recent Developments

Abstract

The published results on the hot deformation behaviour of zirconium and its alloys have been reviewed critically to ascertain the type of information available in the areas of hot workability and evolution of microstructure during hot deformation. It is observed that in a majority of these investigations, the emphasis was on the fundamental aspects of hot deformation such as identification of the rate controlling mechanisms, activation energy for hot working and identification of softening mechanisms. However, no systematic effort has been directed towards the optimization of hot workability and control of microstructure of these technologically important materials. In recent years efforts have been made to characterize the hot workability and development of microstructure during hot deformation by constructing power dissipation maps or processing maps and flow instability maps in the format of Dynamic Materials Model. The power dissipation maps and instability maps have been found very useful in optimizing the hot workability and controlling the microstructure during hot deformation of several zirconium alloys.     

热风炉烧炉计算机控制与节能

对宝钢1号高炉热风炉烧炉中的空燃比、BFG支管流量等进行修正、优化,研究开发了热风炉富氧助燃、模型抗干扰能力等功能,从而实现了热风炉烧炉计算机闭环控制,为高炉提供稳定的高风温,降低了热风炉的燃耗.