红外热成象技术在钢铁工业上的应用

本文介绍了红外热成象技术在钢铁联合企业从冶炼到轧钢线上的初步应用,并就热象仪的检定、介质对测温的影响、发射率的测定作了阐述,指出了热成象技术在钢铁工业中的应用前景。     

非致冷红外焦平面阵列用铁电薄膜

在简要阐述红外成像发展现状基础上，系统介绍了铁电薄膜的性质、制备及在非致冷红外热成像系统应用中的一些热点问题。重点介绍当前有重大技术突破的介质测辐射热式焦平面探测器，比较了热释电模式、介电模式的优缺点及发展前景。由于介质测辐射热式信号获得方式较热释电式有较高的比探测率、响应率、成象精度和质量及较轻的体积和重量，可以预测在不断提高探测用铁电薄膜介电温度系数、损耗及大面积均匀性，不断改进其读出电路的基础上，将成为今后铁电非致冷红外热成像发展的主流。     

英国钢铁公司蒂赛德厂利用红外热成像技术增加生产

英国钢铁公司蒂赛德厂利用红外热成像技术增加生产据《Ｓｔｅｅｌｔｉｍｅｓ》１９９３年４月号报道，英国钢铁公司蒂赛德厂采用三套热成象系统监视加热炉，电气和机械设备的工作状况。三套系统分别设置在该厂的冶金服务部、卷板车间和型钢车间。采用红外热成像技术高了设...     

BR工业故障诊断用红外热像系统简介

1.概况随着工业的发展,对工业过程的监划与故障诊断日趋重要,红外热象系统(简称热象仪)是完成上述任务的新技术手段。热象仪是红外成象技术与图象处理技术结合的产物,它通过探测物体发出的红外线,显示该物体的热状态图象。BR 热象仪在冶金、电力、石化、建材、能源、电子、航空、交通等工业部门有广泛的用途。     

连铸坯热送热装工艺热技术概述

简要回顾了连铸坯热送热装工艺的历史，介绍了该项技术的应用现状及可取得的技术经济效果，并重点从“通用高温坯生产技术”和“温度均匀性保证技术”两个方面介绍连铸坯热送热装工艺的各项“热技术”。     

连铸坯热送热装和热直接轧制技术节能降耗技术经济效益显著

介绍了连铸坯热送热装和热直接轧制技术的技术经济效益，以及在我国发展此项重大工序节能技术所能带来的效益。     

单晶连铸技术的发展及其在单晶铜生产中的应用

介绍了热型连铸技术的原理、优点、关键技术和工艺参数。重点介绍了热型连铸技术在单晶铜生产中的应用，提出了该技术存在的问题及今后的改进方向和发展趋势。     

热卷箱技术在热轧带钢生产中的应用与发展

从工程应用角度介绍了热卷箱技术在热连轧厂的应用和发展，热卷箱设备的结构与操作，对热卷箱技术特点进行详细分析后，提出了热卷箱使用中应注意的问题。     

热卷箱技术及其在热带钢轧机上的应用

在热带钢轧机中采用热卷箱技术，可减少中间带坯头尾温差、降低忆机组能耗、改善产品质量和提高产量。介绍了热卷箱在凌钢的应用并阐述了热卷箱技术的特点和控制功能，以及应用效果。     

热卷箱技术及其在梅钢热轧板厂的应用

在热轧板厂采用热卷箱技术，可头减少中间带坯头尾温差、降低精轧机组轧制力波动、改善最终产品质量。介绍了热卷箱在梅钢的应用并阐述了热卷箱技术的特点和控制功能，以及在梅钢的应用效果。     

热喷涂技术在冷轧薄板生产线上的应用

介绍了热喷涂的原理和热喷涂技术的发展、在钢铁行业中的应用情况及其在冷轧薄板生产线上的应用情况。     

热连轧精轧高速钢轧辊重复上机初始辊形预报

针对热连轧精轧高速钢轧辊重复上机时存在残留磨损辊形和残留热辊形影响初始辊形的问题,分析了残留磨损辊形和残留热辊形对板形控制精度的影响及难点,得出轧辊温度场是高速钢轧辊重复上机初始热辊形最佳表征方式的结论,提出高速钢轧辊下机后空冷过程温度场建模思路,并建立轧辊空冷过程温度场计算模型。在此基础上,基于热连轧生产线二级系统框架,研究形成了高速钢轧辊重复上机初始辊形预报技术设计方案,并在首钢京唐公司1 580 mm热连轧生产线应用。应用结果表明,该技术对实现热连轧精轧高速钢轧辊更高效应用和提高板形控制精度有显著效果。     

宝钢不锈钢生产用耐火材料使用实践

介绍了宝钢不锈钢分公司不锈钢生产线自2004年4月18日投产以来,95 t脱磷铁水包、100 t超高功率交流电弧炉、100 t电炉母液包、120 tAOD氩氧脱碳转炉、120 tVOD真空精炼装置、不锈钢连铸中间包系统及连铸用功能性耐火材料的选择和使用情况.投产近3年来,不锈钢分公司不锈铜生产线各热工设备的包龄、炉龄、功能性耐火材料的使用寿命都有了较大幅度的提高,特别是AOD转炉和VOD钢包的耐火材料迅速国产化,以国产耐材代替进口耐材,使不锈钢冶炼用耐火材料成本大幅降低,使宝钢不锈钢在市场更具竞争力.     

热风炉外壳钢甲倾斜修复找正方法

热风炉外壳钢甲倾斜将会降低其热效率和使用寿命,分析了热风炉外壳钢甲倾斜的原因,介绍了修复找正的方法和生产实践应用的效果;方法简单实用,安全可靠,即省时又省力,且取得了良好的经济效益。     

废塑料在钢铁生产流程中资源化利用研究进展

摘要：废塑料是废弃的含有较高化学能和热能的碳氢化合物之一,其产生量的日益增多给生态环境带来严重污染。介绍了填埋法、焚烧法、再生利用处理废塑料的优缺点,综述了废塑料在钢铁生产流程中资源化利用新进展,分析梳理了废塑料在高炉喷吹、非高炉炼铁、焦炉炼焦、转炉炼钢以及电炉冶炼等方面的发展轨迹和应用前景,并给出中国废塑料在钢铁工业中利用的建议,为废塑料高效资源化利用新技术的开发和工业应用提供参考。     

Modeling the heat flow in spray formed steel shells for tooling applications

This article concerns a metal spraying process for the manufacture of production tooling at reduced time and cost. Critical to the successful operation of this process is control of the sprayed steel shell temperature to eliminate thermal residual stresses and distortion. A computational model of the transient heat flow in steel shells during spray forming has been developed. The critical data for the distribution of convective heat-transfer coefficient distribution over the shell surface and average spray temperature has been obtained from experiments using embedded calorimeters and process monitoring respectively. Shell average temperature and temperature variance have been investigated using the model, and predictions compared well with experimental measurements obtained using infrared thermal imaging. The wire feed rate was identified as the most suitable control parameter for a closed loop control system to regulate shell surface temperature during manufacture.     

Magnetite Production from Steel Wastes with Concentrated Solar Energy

In order to achieve a balanced development in the application of materials for structural or functional purposes, one of the priority objectives of future work is to achieve the goal of “zero waste” in the different production lines. As would be expected from what was agreed in the Kyoto Protocol and the meetings of Copenhagen 2009 and Cancun 2010, the production of clean energy will be strongly encouraged in the future, and indeed that is already the case now. Taking that into consideration, while the promotion of clean energy production is mainly directed toward electricity, solar thermal is quite interesting because of its direct application to metal mining and the chemical processes used in the sustainable development of materials. The combination of both objectives, “zero waste” and “clean energy,” may pose an interesting challenge in the development of primary iron and steel, as well as in other areas of metal production and even in the field of mining. The help of solar thermal energy, which can be concentrated to reach high temperatures, is a tool that could support both the direct production and the recycling of waste steel, in particular waste which is physically and chemically the worst for the environment. This would mean that the environment itself, solar energy, is in fact the key to environmental protection.     

钢包保温层优化及应用

原复合反射绝热板热导率系数值较大,钢包包壳温度较高,在使用过程中钢水温度损失大;而新型气凝胶绝热板是以纳米材料为主,主要材质为SiO₂气凝胶,具有导热系数低、耐高温、密度小、抗压强度高等优越性能。某钢厂120 t钢包保温层用新型气凝胶绝热板替代原复合反射绝热板的效果表明,钢包包壳表面温度平均下降59～73 ℃;通过两种钢包包壳温度计算得出,在生产中,钢包每周转一次,可节省钢水温损9.88 ℃,钢水温降速率降低0.11 ℃/min;通过实测LF炉软吹结束钢水温度及铸机开浇时钢水温度,钢水温降速率降低0.12～0.13 ℃/min,实际钢水温降速率与钢包包壳节省温度计算的钢水温降速率基本吻合,成本下降2.7元/t(钢),取得了良好的试验效果,为新型气凝胶绝热板在钢厂其他保温设备上的应用提供了重要的参考价值。     

Thermal Fatigue Testing of Tool Materials for Thixoforging of Steels

Semisolid processing, already a well established manufacturing route for the production of intricate, thin‐walled aluminium and magnesium parts with mechanical properties as good as forged grades, faces a major challenge in the case of steels. The tool materials must withstand complex load profiles and relatively higher forming temperatures for thousands of forming cycles for industrial application to be attractive. Since the forming pressures are much lower than those encountered in conventional forging, the principle die failure mechanism in steel thixoforging is expected to be thermal fatigue. Hence, suitable materials able to withstand the steel thixoforming environment for an economically acceptable life, can be best identified with a thermal fatigue test. Such a test is described in the present work. A novel CrNiCo and a nickel‐base superalloy, reported to exhibit superior thermal fatigue resistance in demanding tooling applications, was tested under thermal fatigue conditions encountered in the thixoforming of steels.     

Converter smelting of steel with preliminary scrap heating to reduce hot-metal consumption

The consumption of hot metal in slag preparation and slag-coating application in the converter may be reduced by scrap heating. The thermal equivalents of the coke additions and coke consumption in smelting to ensure the required metal temperature at tipping are determined. The basic principles for converter technology with preliminary scrap heating are developed, and experimental data are obtained regarding the efficiency with which the carbon-bearing fuel (coke) is used, so as to improve the thermal balance of the converter process and the final characteristics of steel production.