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当代电炉流程的工程进展评价 总被引:3,自引:1,他引:2
从资源,能源,环境和工程经济等背景分析出发,对比了当代电炉流程和高炉-转炉流程的竞争性,讨论了电炉流程现在与未来的产品领域和市场前景,提出了若干类型电炉流程企业结构优化的参考模式。 相似文献
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根据对钢铁行业低碳发展的分析和设想,未来钢铁生产制造流程将在减量化发展进程中,逐渐演变为高炉-转炉长流程、全废钢电弧炉短流程和氢冶金-电弧炉流程三大类。影响三类钢铁生产制造流程碳排放水平的关键因素包括流程结构、原料结构、能源结构、产品结构、装备水平、管理水平、技术水平等。采用中国钢研构建的双碳分析模型(CISRI-CPCN),绘制了三类流程的降碳路线图。研究结果表明,三类流程碳排放量逐年降低。从2020―2060年,长流程的CO2排放量从2.0 t/t(钢)降低到0.87 t/t(钢),可通过碳汇、碳交易等手段实现碳中和。2050年短流程从0.45 t/t(钢)降低到接近0,有望实现“近零碳”冶炼。2060年氢冶金电弧炉流程(50%废钢+50%HDRI原料结构)从1.31 t/t(钢)降低到接近0,基本实现碳中和。综合考虑国民经济的发展需求,建议未来钢铁行业在减量化发展过程中,对三类流程的产品结构进行逐步调整。长流程的产品结构应逐步过渡到以生产平材产品为主,特别是高端板材,主要布局在沿海深水港地区。短流程应以建筑用长材为切入口,逐步替代中小高炉-转炉流程,部分生产合结钢等优特钢或不锈钢... 相似文献
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在全球“碳达峰”“碳中和”发展形势下,研究高炉-转炉流程低碳技术发展战略、目标和路径,大幅度降低CO2排放对钢铁工业实现可持续发展具有重要意义。面向未来,钢铁仍是重要的基础材料、结构材料和功能材料,钢铁工业仍是经济社会发展的重要基础产业。研究分析了日本钢铁工业发展现状及其特征,介绍了高炉-转炉流程减碳关键技术研究及其进展。针对日本钢铁工业减碳技术开发研究,论述了高炉矿焦混装技术、高比率球团矿冶炼技术对于常规高炉降低燃料比的机理和应用效果。讨论了含碳团矿和预还原烧结矿的制备工艺流程,分析了新型炉料制备的关键技术难点,论述了新型炉料在高炉冶炼过程的减碳机理。介绍了SCOPE 21新型炼焦工艺的构成、技术特点和应用效果;针对铁焦制备的工艺过程、冶金机理和使用效果进行了评述。重点论述了新一代高炉炼铁工艺COURSE 50的工艺组成、技术路线和流程特征,阐述了核心技术难点和关键技术构成以及工程应用前景。分析了构建智能化高炉信息物理系统对高炉减碳的支撑作用,指出了高炉智能化与低碳化协同发展的重要性。结合日本高炉-转炉流程减碳技术发展现状及未来方向,提出了制定可行的减碳技术战略... 相似文献
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钢铁制造流程技术进步与钢铁企业可持续发展 总被引:1,自引:0,他引:1
通过钢铁生产工艺流程技术的演进并结合国情,阐述如何看待和参与电炉流程发展及钢铁企业可持续发展。叙述了钢铁生产工艺流程技术的发展简史,对长、短流程技术做了比较,同时列出了电炉炼钢技术进步要点,分析了我国电炉流程存在的问题,特别提出了对我国电炉流程的认识。预计到本世纪中叶,长、短两种流程会互相渗透、并存发展直至两者在一个最佳点上达到平衡,不远的将来,新的钢铁制造流程一定会出现。 相似文献
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简述了洁净钢生产的基本概念,重点论述了高炉转炉流程生产洁净钢的工艺优化问题,提出了该流程大规模,低成本生产洁净钢的基本思路。 相似文献
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Carbon footprint is the mass of carbon formed in the full cycle of manufacturing one kind or another product. This carbon is included in greenhouse gases. During production of iron and steel are generated carbon monoxide and greenhouse gases: methane, and carbon dioxide. Methane and carbon monoxide burn to carbon dioxide by secondary energy resources. By this means, the carbon footprint by the production of iron and steel has determined by the weight of carbon dioxide formed in this production. As results of analysis of the processes of manufacture of iron and steel, it has revealed that the tandem of blast furnace with electric arc furnace is characterized by a lower value of integrated emissions of CO2 than the tandem of blast furnace with an oxygen converter. It was proposed to process of the cast iron made by one blast furnace, then in the oxygen converter, and, at last, in one or more electric arc furnaces. Moreover, the electric arc furnace is loaded by 30% of iron produced in blast furnace, and the remaining 70% are complemented by metal scrap. In the oxygen converter is loaded, the part of cast iron (75–85%), that remained after processing in the arc furnace. The converter is applied the metal scrap for full loading. Calculations of total emission of carbon dioxide for different triads of these units are made. Simultaneous use of oxygen converter with electric arc furnaces for cast iron smelting (obtained from one blast furnace) helps to reduce reliably the emission of carbon dioxide to 20% as it is follows from these calculations. This suggests that such a triad of used units conforms to green technology. Example of the use of mentioned triad is for a full load of the converter applied to metal scrap. The calculations total emissions of carbon dioxide for different triads of these units were performed. From these calculations it follows that the simultaneous use of oxygen converters after electric arc furnaces for smelting iron (obtained from one blast furnace), it helps to reduce the emission of carbon dioxide to 20%. This suggests that this triad of used units conforms to green technology. An example of using this triad is in the Magnitogorsk Iron and Steel Works, where along with the oxygen converter, electric arc furnaces with the use of locally produced electricity at burning fuel of secondary energy resources from units, in which the fuel is burnt. This practice can be recommended for a number of other metallurgical enterprises. 相似文献
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Basak Anameric 《Mineral Processing and Extractive Metallurgy Review》2013,34(1):59-116
The blast furnace process is still the predominant method for primary iron production. However, the disadvantages inherent to the process led to the development of alternative processes such as the mini blast furnace process, smelting reduction process, and direct reduction process. Many of these alternative processes are still under development. However, direct reduction processes have reached some level of commercial applicability and are considered to be the most developed alternative ironmaking route. It is coke-less and environmentally friendlier when compared to the blast furnace process. In addition, direct reduced iron has a well-defined chemical composition when compared with steel scrap and has efficient melting properties in the electric arc furnace. Consequently, there is a great increase in the demand for direct reduced iron in electric arc steel making. These attractive features have led to an increase in worldwide production of direct reduced iron, which is currently approaching 50 million tons. Thus, direct reduced iron is gaining more importance. Hence, this article summarizes the basic properties and features of direct reduced iron. 相似文献
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《Baosteel Technical Research》2012,6(2):21-26
With a complicated composition,large production and serious damage to the environment,stainless steel cold- rolling sludge has been a focal point concerning environmental protection for stainless steel enterprises. Up to now , neither at home nor abroad have any technologies come into being that are not only proper,safe and economical but also suitable for bulk utilization of stainless steel cold-rolling sludge. Based on the characteristics of the stainless steel cold- rolling sludge,orthogonal experiments were carried out on pellet proportioning and high-temperature roasting,and major metallurgical properties of sludge pellets were also tested. As the results show ,pellets with 30% addition of cold-rolling sludge are qualified regarding their compressive strength,chemical composition and major metallurgical properties. No adverse impact happens to the blast furnace operation when sludge pellets account for 10% of the blast furnace raw materials. Therefore,the technical route applied in this paper is proved simple,feasible and environmentally friendly for cold-rolling sludge treatment. 相似文献
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This paper explores the underlying drivers of steel production to predict the fate of the blast furnace as a steelmaking route. Steel production is driven by demand for stocks of steel products and increases in steel stocks are driven by population growth and economic development. However, per-capita steel stocks are expected to saturate with economic development leading to the long-term saturation of steel demand. Combined with an increase in the availability of end-of-life scrap, this suggests that the electric arc furnace route will be increasingly dominant. Furthermore, with an increasingly resource and carbon constrained world, material efficiency strategies will be required to provide the same services with less liquid steel. These factors may usher in the end of the blast furnace era within the next 50 years. This paper is based on research undertaken as part of the WellMet2050 project, and was delivered at the Cleveland Institution of Engineers debate in December 2014. 相似文献