利用烧结余热烘干焦炭 降低煤气系统水分

利用烧结矿低温余热,降低并稳定焦炭水分,减少高炉炉况波动;降低煤气系统水分,减缓了水汽对煤气系统设备的影响,提高烟气余热、煤气热值及高炉余压等二次能源的利用率和综合节能效果。利用热风炉烟气余热烘干焦炭与烧结矿余热烘干焦炭的方式对比。     

CCPP双机同时跳闸对高炉煤气管网系统的影响及控制措施

针对高炉富余煤气系统配套的两台CCPP机组受管网压力波动影响接连跳闸,造成高炉煤气管网压力突升、超压,影响煤气系统安全运行的问题,对机组接连跳闸原因进行了分析。采用CCPP双机运行期间预留气柜柜容、紧急放散塔被动保护、单台机组跳闸后加强运行机组热值控制及人为干预等措施,保证二次能源高效利用状态下的高炉富余煤气系统运行安全性和稳定性。     

热风炉节能燃烧的分析

以高炉煤气在热风炉燃烧室燃烧的热工特性为基础，用数值计算方法研究烧炉方式，煤气含水量及空气，煤气双预热对煤气使用量的影响，为节省加热热风炉的煤气量，提高高炉风温和充分利用煤气的热值提供理论依据。     

转焦混合煤气在蓄热步进式板坯加热炉上的应用

唐钢热轧部1700线拥有两座加热炉,两炉均使用高炉煤气,为减小高炉休风对加热炉生产的影响,决定对其2#炉进行混合煤气改造,混合煤气为转焦混合煤气。目前,中高热值煤气在双蓄热板坯加热炉上应用尚无先例,介绍了中等热值煤气在双蓄热板坯加热炉上应用效果、存在问题、原因分析及改进措施,对同类加热炉使用中热值燃料具有借鉴意义。     

降低高炉煤气含水量,提高煤气热值

济钢燃气厂在高炉煤气净化处理中存在煤气含水量超标的问题，为降低高炉煤气含水量、提高煤气热值，在原系统中加装了丝网脱水器，并对洗涤系统进行了优化操作。     

燃气锅炉的技术改造实践及浅析

钢铁厂高炉炉料、炉况有时会发生变化,导致煤气热值变化.探讨了高炉煤气热值降低后燃气锅炉采取的改造措施及成效.     

热风炉自动燃烧技术在300m3高炉的应用

介绍了热风炉自动燃烧技术在安钢300m^3高炉上的心用情况。由于煤气压力的热值波动大，燃烧过程难以控制，采用自动燃烧技术后，空、煤气配比达到了最佳，优化了，燃烧过程．使热风炉能力得到了充分发挥，热风温度提高了23℃以上。     

马钢新区高炉煤气热值分析方法的探讨

研究了马钢新区高炉煤气热值情况,改进了高炉煤气热值分析方法和误差控制手段,使得分析结果更准确,为高炉冶炼节能降耗提供依据。     

稳定加热炉用混合煤气热值的方法探讨

介绍了包钢混合煤气调节系统现状和存在的问题，论述了混合煤气热值波动对轧钢加热炉生产的影响，及稳定热值的节能效益，最后提出了改进煤气混合系统的建议。     

变压吸附浓缩高炉煤气的经济性分析

高炉煤气由于热值和燃烧效率低而大量放散,本文提出采用变压吸附技术浓缩高炉煤气提高其热值和燃烧效率。进行了燃烧效率和工程及技术经济性分析,结果表明高炉煤气浓缩是利用高炉煤气最有效的节能方式,具有广阔应用前景。     

Experimental study on the effect of using nut coke on the permeability of packed beds in blast furnaces

The charging pattern may affect blast furnace permeability,coke ratio,and the freedom to select low-grade raw materials. Ore-coke mixed charging is a potential technique for optimizing the charging pattern. In recent years,charging small-sized coke( nut coke) into the burden layer has been applied to save raw materials and decrease cost.Although mixed charging,especially adding nut coke into the burden layer,may have many advantages,the mechanisms and side effects of nut coke use are not well understood,and the mixing ratio is still limited in industrial blast furnace operation. In this study,the status of mixed charging,especially nut coke used in blast furnaces,was investigated. A cold flow model was established to study the permeability of the packed bed in the blast furnace "dry zone"under different conditions with the aim of better understanding the mechanisms of mixing coke and nut coke into the burden layer. The effect of coke size,mixing coke ratio,layer numbers,and gas flow rate on the pressure drop of the packed bed was investigated. The experimental results show that mixing the nut coke in the ore layers decreases the pressure drop to different extents depending on mixing ratio.     

高炉搭接期焦炉生产供气不足的研究

宝钢二期焦炉由于混合煤气供气不足，日产量难以满足三号高炉投产时一、三号高炉搭接期间的焦炭供应。为了解决这一问题，对混合煤气全系统进行了检测试验和分析研究，并对ＢＦＧ和ＣＯＧ系统进行了技术改造从而满足了焦炉生产的需要。     

浅谈CCPP与蓄热式轧钢加热炉

由于国内大型钢企普遍引进CCPP(燃气蒸汽联合循环发电机组)装置,占用了大量的高炉煤气,导致他们的轧钢加热炉不得不烧高焦炉混合煤气。通过将某Y厂中板加热炉采用蓄热式技术获得的效益与某A厂采用300MWCCPP装置获得的效益进行比较,认为CCPP技术应该逐步退出历史舞台。     

Coal pyrolysis and kinetic model for non-recovery coke ovens

Abstract

In heat recovery non-recovery coke ovens, the volatile gases generated are burnt, and the heat generated is used for cokemaking. The extra heat, along with the flue gases, is utilised in boilers for power generation. JSW Steel has 1·2 Mtpa non-recovery coke ovens to meet the coke requirement of blast furnaces. Until now, very limited work has been carried out on heat distribution in non-recovery coke ovens. In this work, the heat distribution in non-recovery coke ovens is studied to determine the variables influencing the flue gas temperature and thereby power generation. A mathematical model has been developed to predict the power generation using functional group, depolymerisation, vaporisation and cross-linking for non-recovery coke ovens at JSW Steel. Gas generation, heat generation, power generation and total heat distribution are calculated using the model. The present paper details the study on heat distribution, thereby various factors affecting the power generation, and also quantifies the effect of coal quality in particular volatile matter on gas generation, flue gas temperature and power generation.     

高炉配加高钛型球团矿的工业试验及应用

通过高炉配加10%～40%高钛型球团矿替代混合球团矿工业试验,探索出了高钛型球团矿对烧结和高炉生产的影响。工业试验表明,高炉配加高钛型球团矿后,由于烧结配料中钒钛磁铁矿用量减少,烧结矿转鼓提高1.18%,返矿率降低1.33%,高炉煤气流分布更加合理,高炉利用系数提高0.11t/（m3.d）,煤比增加22kg/t,焦比降低18kg/t。推广应用期间,高炉稳定顺行,炉缸活跃,利用系数提高0.141t/（m3.d）,高炉各项指标得到明显优化。     

锰铁高炉矿焦混装试验及可行性探讨

根据我国某些锰铁高炉矿焦混装试验的结果，剖析了矿焦混装在锰铁高炉上的冶炼效果，探讨了矿焦混装可行性和操作中的一些有关问题．     

需求侧管理在煤气全流程分析中的应用

为提高煤气的综合利用效率,济钢利用需求侧管理的方法,通过分阶段制定煤气需求侧管理方案、加强煤气动态管理、优化燃机及煤气柜的运行方式、调整煤气用户用气结构等措施,实现了高、焦炉煤气放散率分别为0.30%、0.16%,转炉煤气综合吨钢回收率完成114.50 m3,年度实现经济效益约860万元。     

小块焦对高炉焦比的影响

在高炉冶炼过程中小块焦一直被认为只是作为资源再利用,使用时常常不被看好。通过实验室的探索性研究,了解到小块焦的粒度效应对其失重率作用很大,小块焦的反应性相对于冶金焦有很大的提高。可以认为小块焦在炉内改善了还原性,有促进矿石还原作用。小块焦的大量气化吸热有降低热储备区温度的倾向,对高炉的燃料消耗进一步降低起了一定作用。750 m3高炉的生产性试验结果表明,提高小块焦的用量有利于燃料消耗的降低,其他工艺参数不变,增加1 kg/t的小块焦相当于置换焦比1.19 kg/t。     

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.     

宝钢不锈钢2500 m3高炉低燃料比生产实践

宝钢不锈钢2500m3高炉为了实现高效、低成本生产,通过多焦种配焦技术、炉内操作技术优化以及低硅冶炼技术的实施,取得了显著成效,2006年燃料比487.46kg/t,达到国内同类高炉领先水平.