熔融还原炼铁的专利技术现状

文章介绍了近20年来在中国申请的熔融还原炼铁专利的状况,对目前有效的熔融还原炼铁专利进行了技术分析,指出了国外专利申请人在熔融还原炼铁专利技术方面的发展重点和保护策略,并对国内申请人如何成功地进行专利申请和研发提出了建议:（1）"预还原+终还原"的二步法熔融还原炼铁中的预还原和终还原之间是相互影响的,因此更应当以整个工艺作为出发点,对预还原步骤和终还原步骤进行协调性的改进;（2）国内专利申请人应汲取国外申请人的成功经验,以某一技术作为基础,有明确的研发方向,形成鲜明的专利保护的辐射圈;（3）通过合作研发共同申请专利,过渡到自主开发的经验仍然可供国内专利申请人借鉴。     

攀枝花钒钛磁铁矿非高炉冶炼技术评价

介绍了攀枝花钒钛磁铁矿资源综合利用的采选和冶化现状,综述了国内外非高炉炼铁技术现状,对非高炉炼铁技术在攀枝花钒钛磁铁矿资源综合利用中的研发状况进行了分析,评价了非高炉炼铁技术在攀枝花钒钛磁铁矿资源综合利用中的前景,提出了攀枝花应着手引进COREX融熔还原技术和小规模发展隧道窑技术的建议.     

90年代的非高炉炼铁（待续）

论述了导致非高炉炼铁技术发展的原因，简介了９０年代蓬勃兴起的，各种有发展前途的直接还原技术和熔融还原技术，本部分主要介绍Ａｒｅｘ，Ｉｒｏｎ Ｃａｒｂｉｄｅ，Ｆａｓｔｍｅｔ等直接还原技术及其优缺点。     

浅谈Corex炼铁法的环境效益

简述了Ｃｏｒｅｘ熔融还原的工艺的生产流程和特点，对Ｃｏｒｅｘ炼铁法和高炉炼铁工艺在环境污染方面进行了比较，Ｃｏｒｅｘ工艺显示了巨大的环保优越性，并依实例对其环境效益作了分析和探讨。     

炼铁过程操作线图

根据炼铁技术最新发展,提出了综合各种炼铁过程（如高炉,非高炉以及各种熔融还原工艺）的热平衡新的表示方法。在此基础上,以ＲＩＳＴ操作线为基本思路,建立了新的炼铁过程操作线图,为一新线图可以直观并形象地分析各种炼铁过程的物质转移过程和能耗,有助于冶金工作者分析和选择各种炼铁过程。     

90年代的非高炉炼铁（续完）

继介绍直接还原技术后，本部分主要综述ＣＯＲＥＸ ＤＩＯＳ、ＨＩｓｍｅｌｔ及ＣＣＦ等有发展前途的熔融还原炼铁技术及比较了彼此的优缺点。     

我国发展非高炉炼铁技术前景光明

大力开发和发展非高炉炼铁技术以代替高炉炼铁是近20年世界钢铁技术发展的主要方向和前沿技术之一,各国钢铁业界纷纷开发出各类直接还原铁技术和熔融还原技术,我国在这类技术的开发和应用中也取得了很多成果。最近从中国金属学会2008年非高炉炼铁年会中发表的论文和专家的发言中,大致勾勒出中国在非高炉炼铁技术的开发和应用方面的发展轮廊。     

电化学方法制铁研究的进展

传统的钢铁生产工艺能耗高、二氧化碳排放量大.电化学法炼铁的生产效率高,将电化学炼铁技术与新能源技术相结合,可实现零碳排放炼铁.电化学技术在生产高纯和超高纯铁基合金方面也具有独特的优势.随着现代高新技术的发展,高纯铁的需求量越来越大,电化学法炼铁的前景也愈加广阔.从高温熔盐(熔融氧化物)和低温水溶液电化学两个方面概述了国...     

钢铁时代的冶金技术改革者——托马斯

<正> 19世纪是科学和技术文明迅速发展的时代,是炼钢方面的所有重要技术取得全面进展时期。在英国,随着工业革命的深入,需要大量的铁和钢,可是当时的英国由于木炭不足,炼铁业停滞不前,所需铁材的三分之二只好从森林资源丰富的瑞典、俄国进口。为改变这种日益严重的依赖进口的状况,在80年代,英国实现以煤炭炼铁代替木炭炼铁的一系列技术革新。但当时的精炼铁却依靠手工操作的搅拌法,这必然严     

COREX-C3000炼铁工程熔融还原炉安装焊接技术

浦钢搬迁罗泾工程COREX-C3000炼铁工程是世界上较大的熔融还原炼铁工程。本文介绍了COREX-C3000熔融还原炉的结构形式及安装焊接特点与难点,重点叙述了炉壳安装焊接工艺评定、焊接工艺以及焊接质量的控制措施,总结了熔融还原炉焊接技术经验。     

COREX工艺输出煤气的综合利用

COREX工艺是当代冶金工业的炼铁前沿技术,可以使用铁矿和非焦煤生产出优质铁水。介绍了COREX生产的副产品输出煤气的特性及其在发电、生产直接还原铁(DRI)或球团、钢铁厂内设备加热、高炉喷吹以及生产清洁能源等方面的应用。     

熔融气化炉内硫的反应机理与分配规律

在实验室模拟了熔融气化炉（ＣＯＲＥＸ）的冶炼过程，通过解剖，研究了炉内硫的反应与分配，得到了预还原矿，熔剂，煤，煤气，炉渣，铁液中硫的变化规律，以及这些变化对最终铁水含硫的影响。     

大型钢铁联合企业应用COREX工艺的探讨

与高炉相比 ,COREX工艺具有明显的特点 ,并有发展潜力。就目前状况 ,只有在大型联合企业内 ,COREX技术才能发挥出经济优势 .国家应采取扶持政策 ,保证COREX工艺在大型联合企业内成功引进和建设 ,使其发挥出较好的经济和环境效益。     

COREX法的开发研究综述

介绍COREX工艺研究开发的过程，着重叙述了在ESCOR建造30万t／a生产能力的COREX工业装置中的技术改进，以及ISCOR公司在这一过程中的介入、参与及所起的重大作用     

用COREX技术淘汰二次化铁炼钢的可能性

介绍浦钢和五钢二次化铁炼钢的情况以及ＣＯＲＥＸ炼钢技术发展现状,并就上钢系统采用ＣＯＲＥＸ工艺的煤气利用,ＣＯＲＥＸ－Ｍｉｄｒｅｘ联合流程,以及投资和生产成本测算等方面提出了看法和意见。     

ADVANCED NICKEL-BASED AND NICKEL-IRON-BASED SUPERALLOYS FOR CIVIL ENGINEERING APPLICATIONS

The use of high-temperature materials is especially important in power station construction, heating systems engineering, furnace industry, chemical and petrochemical industry, waste incineration plants, coal gasification plants and for flying gas turbines in civil and military aircrafts and helicopters. Particularly in recent years, the development of new processes and the drive to improve the economics of existing processes have increased the requirements significantly so that it is necessary to change from well-proven materials to new alloys. Hitherto, heat resistant ferritic steels sufficed in conventional power station constructions for temperatures up to 550℃ newly developed ferritic/martensitic steels provide sufficient strength up to about 600 - 620℃. In new processes, e.g. fluidized-bed combustion of coal, process temperatures up to 900℃ occur. However, this is not the upper limit, since in combustion engines, e.g. gas turbines. Material temperatures up to 1100℃ are reached locally. Similar development trends can also be identified in the petrochemical industry and in the heat treatment and furnace engineering. The advance to ever higher material temperatures now not only has the consequence of having to use materials with enhanced high-strength properties, considerable attention now also has to be given to their chemical stability in corrosive media. Therefore not only examples of the use of high-temperature alloys for practical applications will be given but also be contributed to some general rules for material selection with regard to their high-temperature strength and corrosion resistance.     

STUDY ON THE VARIATION MECHANISM OF CARBON CONTENT OF LIQUID IRON IN MELTING GASIFIER

This paper studied the changing principles of carbon content in direct reduction iron (DRI) and liquid iron in the COREX melting gasifier. Under the normal working conditions of experimental equipment, liquid nitrogen was poured into the melting gasifier from its tuyere to cool down quickly. And then seven cross sections were made to study the carburization reaction and its characteristics of the solid iron and the liquid iron, and also the reaction of carbon between the slag and the metal. According to the results, the influences of the thickness of the semi-coke layer and the temperature on the carbon content of liquid iron in the COREX melting gasifier were confirmed.     

热模模压制取铝电解阳极炭块

采用热模模压法制备铝电解阳极炭块,并对制取的阳极炭块的物理化学性能进行测试。研究模压工艺和沥青添加量对预焙阳极炭块体积密度、抗压强度和抗氧化性的影响。采用扫描电镜对炭块的微观结构进行分析,对热模模压生产阳极炭块的机理进行探讨。结果表明：采用热模模压法生产炭阳极可使沥青进入石油焦颗粒的内部,并填充石油焦颗粒内部的气孔,从而减少预焙阳极炭块的气孔率,提高其密度。采用热模模压生产的预焙阳极炭块的体积密度为1．64～1．66g／cm3,比工业阳极炭块的体积密度增加0．08～0．12g／cm3,同时其抗氧化性能也获得妨大的辑高．     

Review of the development and breakdown of protective oxide scales on alloys exposed to coal-derived atmospheres

Metal components in coal utilization and conversion systems are subject to severe corrosion by sulfur and other impurities in coal-derived environments. Most of the alloys and metallic coatings designed to withstand high-temperature aggressive environments rely on the formation of protective Cr ₂O₃ and Al ₂O₃ scales. However, in mixed-gas environments containing sulfur, either the protective oxide scales do not form or they rapidly break down. In order to understand corrosion behavior in mixed-gas environments, previous work on corrosion of high-temperature materials in coal-related applications is summarized. Current ideas for the development of protective oxide scales on alloys in mixed-gas environments by preoxidation and by the addition of reactive elements to the alloys are reviewed. Finally, future studies are recommended as being important to the development of alloys with better corrosion resistance in mixed-gas environments.