高炉冶炼锰铁大喷煤量探讨

为了早日实现高炉冶炼锰铁喷煤,借鉴国外高炉喷的先进经验,分析了中国锰铁高炉大喷煤量的技术难点,对锰铁高炉大喷煤的可行性及相应进行了探讨。     

冶炼钒钛磁铁矿的高炉喷煤技术

冶炼钒钛磁铁矿的高炉,由于喷煤时未完全燃烧的煤粉进入炉缸,与高温熔渣接触,促使高熔点的钛的碳氮化合物生成,导致炉渣粘稠,使冶炼无法正常进行,因此喷煤技术被视为冶炼钒钛磁铁矿高炉的禁区。近年来,攀钢高炉采用高冶炼强度、低喷煤强度、均匀喷吹、氧煤混喷等技术改进工艺,使高钛型钒软磁铁矿高炉喷煤技术获得成功,并在攀钢1号高炉投入生产,实现了技术上的重要突破并获得良好的经济效益和社会效益。     

高炉冶炼锰铁大喷煤量探讨

借鉴国内外高炉喷煤的先进经验，分析了我国锰铁高炉大喷煤量的技术难点，对锰铁高炉大喷煤的可行性及相应措施进行了探讨。     

安钢3#高炉大喷煤量探索

安钢3^#高炉采用全烟煤喷吹。提高煤粉燃烧率、维持适宜的理论燃烧温度、保证煤气流的合理分布是提高喷煤比的关键。本文介绍安钢就如何提高3^#高炉喷煤量及大喷煤量下的高炉操作进行探索并取得了良好技术指标（煤比提高24kg／t，焦比降低了43kg／t）的生产实践。     

马钢300m^3高炉大喷煤量实践

马钢３００ｍ＾３高炉使用料率约９０％的低钒钛矿冶炼。本文阐述了在入炉粉末约１６％、风温１０７０℃、平均富氧不足１％的条件下，实现高炉１２０￣１５０ｋｇ／ｔ大喷煤量冶炼的经验。     

高炉大喷煤量的生产实践

本文总结了首钢高炉大喷煤量的生产实践。经验证明,大喷煤量操作不仅能节约部分昂贵的炼焦煤,而且也是在高炉冶炼中具有重要作用的一种手段。喷煤对高炉顺行、高产、优质低耗的作用是十分重要的。在基本无富氧条件下,入炉品位正常时,只要高炉基本操作制度合理并贯彻“四稳定”操作方针,保证喷煤量100～150 kg/t,在技术上是完全可行的。文中还对首钢高炉富氧大喷煤强化冶炼进行了简略评述。     

高炉节能降耗的技术攻关

安钢6高炉通过采取精料、优化高炉操作、加强上料和出铁管理以及TNPM设备运作等降低工序能耗的技术措施后,2006年7月工序能耗（标煤）达到430 kg/t,比2005年同期降低57 kg/t。     

氧气高炉技术及炼铁工序能耗初步分析

氧气高炉(以430m^3高炉为例)综合数学模型分析计算表明,氧气高炉采用全氧鼓风、顶煤气循环及煤气加热等技术,可提高喷煤量、降低焦比、提高生产效率,其工序能耗较传统高炉相比降低6.27%。通过对氧气高炉的煤气重整能耗和生产工序能耗的分析对比,认为氧气高炉的总体综合能耗较传统高炉具有一定优势,发展氧气高炉有利于节能降耗、降低环境污染,实现可持续发展。     

高炉喷吹混煤燃烧率试验研究

利用等离子燃烧试验炉,对混煤喷吹进行了试验,试验结果表明：混合煤种的燃烧性能取决于单一煤种的燃烧性能的综合效果,燃烧性能较好的煤种混合后仍能保持较高的燃烧率;混合煤种燃烧率高于计算燃烧率,形成了煤种不同的促燃作用;在使用煤种不变时混合煤燃烧率取决于燃烧性能较好的烟煤配入量。     

高炉炼铁节能降耗及资源合理利用技术

主要介绍了国内外钢铁企业在传统高炉炼铁基础上所采取节能降耗和资源合理利用技术,包括:铁焦技术、喷吹微生物及木炭技术、喷吹焦炉煤气技术、喷吹废塑料技术,以及高炉喷煤技术的优化措施。     

富氧大喷煤高炉操作线研究

高炉富氧大喷煤时,必须考虑煤气中的氢元素、煤的预热及挥发分的分解热。作者对不喷煤时高炉操作线的计算和绘制方法进行修正,推导出富氧大喷煤时高炉操作线的计算公式。应用该公式可预测富氧大喷煤条件下高炉内煤气成分、煤气量、热量分布和化学反应等的变化,以便控制这些变化带来的影响,保证高炉顺行。     

Mathematical Modeling of the Energy Consumption and Carbon Emission for the Oxygen Blast Furnace with Top Gas Recycling

The ironmaking process is the most significant source of CO₂ emission in the iron and steel industry, which generates large quantities of greenhouse gases. Recently, oxygen blast and top gas recycling have been applied to the blast furnace to improve the energy efficiency and reduce the pollution from the ironmaking process. However, as a new ironmaking technology, the oxygen blast furnace with top gas recycling (TGR‐OBF) is still under development. This paper focuses on the investigation of the energy consumption and carbon emission for the TGR‐OBF process by modeling the stack, the bosh, the combustion zone, and the gas recycling system. Effects of the key parameters in the TGR‐OBF process on the carbon consumption of reactions and the energy consumption of the system are investigated by orthogonal experiments. Our results indicate that the TGR‐OBF process has the advantages of reducing energy consumption and CO₂ emission. The low temperature and high reducing environment in the new furnace is favorable to lower the coke gasification and increase the reaction rate of iron oxide. The recycling of the top gas can significantly reduce CO₂ emission, and the main advantage comes when the stripped CO₂ is stored.     

中国高炉工序能耗现状及节能技术回顾与展望

 资源和能源短缺成为我国钢铁工业发展的主要制约因素之一,而高炉炼铁作为当代主要的炼铁工艺,其能耗在钢铁生产中占有较大比例,必须以降低高炉工序能耗作为我国钢铁工业系统节能的重点。因此,本文着重介绍了高炉工序的主要节能技术,并对高炉工序的新技术进行了展望。     

中国高炉工序能耗现状及节能技术的回顾与展望

资源和能源短缺成为中国钢铁工业发展的主要制约因素之一,而高炉炼铁作为当代主要的炼铁工艺,其能耗在钢铁生产中占有较大比例,因此必须以降低高炉工序能耗作为中国钢铁工业系统节能的重点。着重介绍了高炉工序的主要节能技术,并对高炉工序的新技术进行了展望。     

Blast Furnace Operating Conditions Manipulation for Reducing Coke Consumption and CO2 Emission

A comparative reduction behavior of wüstite samples prepared from iron ore sinter was investigated to find the optimum way for reducing coke consumption and CO₂ emission in blast furnace technology. A series of wüstite reduction experiments was carried out using different gas mixtures. A correlation between the experimental results and real data of blast furnaces at Egyptian Iron and Steel Company (EISCO) was demonstrated in order to optimize the coke consumption inside blast furnaces. Different theoretical models were applied on real data of blast furnaces to calculate the effect of operation parameters on the coke consumption. It was found that the wüstite reducibility can be controlled and enhanced using certain ratio of H₂ and CO gases. Such kind of enhancement decreases the remaining quantity of unreduced wüstite which descends to the high temperature region of blast furnace. The theoretical analysis of real data using certain values of H₂ and CO shows that increasing the amount of natural gas injection in blast furnace of EISCO will decrease the degree of direct reduction of iron oxide and consequently will decrease the amount of coke consumption.     

工艺参数对氧气高炉能耗的影响规律

建立了氧气高炉煤气不循环利用流程,炉身喷吹循环煤气流程和炉缸喷吹循环煤气流程数学模型,分析了工艺参数对氧气高炉能耗的影响,结果表明：煤气不循环利用流程一次能耗远远高于煤气循环利用流程,不适合进行工业化生产;金属化率对氧气高炉能耗影响很大,金属化率每升高5％,吨铁焦比降低约37kg;煤气循环利用流程各煤气量匹配要合理,炉...