电炉除尘系统改造实践

针对三宝钢铁有限公司电炉炼钢工艺发生变化,原有的除尘能力难以满足越来越高的环保要求,通过电炉除尘系统的改造和增设余热锅炉系统回收烟气余热产生蒸汽,不仅使得电炉除尘系统更高效、经济、环保,也提高了电炉炼钢能源循环利用。     

除尘风机的高压变频节能改造

简要介绍传统烧结除尘风机的工艺要求和控制设备,分析传统控制方式在能源消耗和运行特性上的弊端.根据高压变频器的节能原理,提出了烧结除尘风机高压变频调速的改造方案,并详细阐述了系统结构和主要功能.最后,通过在本溪北营钢铁(集团)股份有限公司烧结除尘风机上的实际应用,验证了高压变频器出色的控制特性和节能效果.     

涟钢300m~3级高炉煤气干式布袋除尘通过技术鉴定

由冶金部钢铁司委托湖南省冶金厅主持的涟钢2号高炉(329m~3)煤气布袋除尘技术鉴定会于1986年6月12～13日在涟源钢铁厂召开。涟钢2号高炉煤气布袋除尘升级试验是由冶金部钢铁司和湖南省冶金厅于1983年10月主持召开的技术方案论证会上确定的。该系统由包头钢铁设计研究院承担设计,并参加试验、调试工作,建设和试验以涟钢为主。1985年元月布袋除尘与高炉同步投入运行。在试验过程中,设计和生产单位共     

转炉除尘水水质稳定方法改进的探讨

抚顺新钢铁有限责任公司有45 t转炉3座,一次除尘是湿法除尘,实际运行过程中出现过较为严重的问题,管路堵塞,系统结垢,给生产造成很大的影响,经系统研究并采取具体措施,系统问题得以彻底的解决.文中主要介绍了针对实际问题结合炼钢工艺特点,进行分析探讨和采取的措施.     

350m^3高炉煤气清洗采用单文除尘工艺

济钢燃气厂、规划设计院和北京钢铁设计研究总院共同设计，对第一炼铁厂１＃高炉煤气清洗系统进行了技术改造，自１９９５年９月１３日投运以来，各项经济技术指标均达到了设计要求，取得了安全、经济运行的效果。济钢３５０ｍ３，高炉煤气清洗系统原为湿法塔文电除尘工艺，该工艺耗能高、设备检修量大。１９９２年曾将定径文氏管改为可调喉口文氏管，除尘效果也不理想，煤气仍然需要经电除尘器进行精除尘后才能达到质量要求。１９９５年大修时机，改为“单文除尘”新工艺，该工艺改变了原塔文电除尘系统，改由一支新型可调转子文氏管和新型…     

宝钢湛江钢铁铁前工序烟气净化新工艺技术

宝钢湛江钢铁秉承宝钢“成为绿色产业链的驱动者”的绿色愿景,切实履行国家的环保新要求,全力打造一个“绿色钢铁基地”.首先简要分析目前钢铁行业大气污染物排放和烟气综合治理情况,再结合宝钢湛江钢铁大气污染物排放控制的目标,介绍宝钢湛江钢铁铁前各工序采用的烟气净化工艺技术:焦炉烟囱烟气旋转喷雾半干法脱硫+选择性催化还原法(NH3-SCR)除尘脱硝工艺设备、烧结烟气活性炭净化脱硫脱硝工艺设备、球团烟气净化LJS循环流化床法脱硫工艺设备、高炉烟气净化干法除尘和新增出铁场炉顶罩等设备.各个工序采用的烟气净化工艺在实际生产中均取得了良好效果.     

转炉一次除尘系统的改造实践

随着转炉的扩容改造,传统的转炉一次除尘系统已经不能满足现有转炉的除尘要求。因此,新型转炉除尘系统—洗涤塔-环缝式除尘系统应运而生。洗涤塔-环缝式除尘系统具有系统阻力小,除尘效果好的特点,在唐山国丰钢铁有限公司得到了很好的应用,是值得推广应用的先进技术。     

单光路激光气体分析仪在转炉煤气回收中的应用

针对转炉煤气回收柜前、干法除尘工艺中电除尘装置后煤气浓度分析的重要性和目前分析系统的不足,结合冶金行业大力推行节能减排、绿色炼钢的可持续发展模式,介绍济南钢铁股份有限公司第三炼钢厂新炼钢转炉的煤气浓度分析仪,详细说明激光分析仪工作原理,重点介绍单光路激光气体分析仪在转炉干法除尘中的应用问题。实践证明激光分析仪能够满足在转炉煤气回收利用中煤气浓度的监测功能要求。     

250 t转炉烟气干法除尘工艺应用

邯宝钢铁有限公司炼钢厂2×250 t转炉采用干法(LT法)烟气净化回收工艺,该工艺由烟气冷却、净化回收及控制系统组成,主要设备有蒸发冷却器、静电除尘器、轴流引风机、切换站、煤气冷却器、放散烟囱.生产实践证明,该系统运行稳定,除尘效率高,且运行费用低,净化后的烟气含尘量仅为6.8 mg/m3.     

烧结机机尾除尘浅析

烧结机机尾除尘浅析梁洪初（涟源钢铁股份有限公司）涟源钢铁股份有限公司有两台２４ｍ２烧结机，其机尾除尘采用旋风一布袋除尘系统，于１９８２年建成投产；另一台３０ｍ２烧结机机尾除尘采用沉降室一电除尘系统，于１９８７年建成投产。几年来的运行实践表明，前一除尘...     

Sensor Fault Detection in Power Plants

This paper presents a sensor fault detection and diagnosis approach for industrial combustion processes. Clustering algorithms are applied to the measurements of controllable process variables involved in single-input-single-output feedback control loops. Current data points from the process are compared with the clusters to identify sensor faults. Once the measurements of controllable process variables are obtained, a decision-tree algorithm monitors response process variables based on the controllable and noncontrollable process variables as predictors (inputs). Test data and training data residuals generated by the decision-tree algorithm are analyzed with statistical process control limits to identify sensor faults. The proposed approach handles data from temporal processes by periodic updates of the knowledge base. An industrial boiler combustion process is used to test the ideas presented in this paper.     

湿法炼锌除铁工艺研究

介绍了常规法、热酸浸出、氧压浸出、针铁矿和赤铁矿等几种湿法炼锌除铁工艺,重点对SO2还原浸出、热酸还原浸出、氧压还原浸出的赤铁矿除铁工艺的各项指标进行了比较。含铁低的原料,适宜采用常规工艺和针铁矿工艺;含铁高的原料适宜采用黄钾铁矾法和赤铁矿法;而氧压浸出工艺两种原料都能适应。     

轻苯酸洗精制法中洗涤工序的防腐蚀措施

硫酸和碱腐蚀在轻苯酸洗精制法洗涤工序中较为普遍,如何防止酸洗精制法洗涤工序中的设备酸、碱腐蚀及采用何种材料防止腐蚀是值得关注的问题。文章主要对酸洗精制法洗涤工序的设备腐蚀情况进行了分析,并提出了解决方法。     

钢铁厂高能效利用副产煤气的可行途径

钢铁厂在生产过程中,副产了大量可燃煤气。副产煤气热值范围在3～20MJ/Nm3,所含的热量可被利用,如:电厂、焦炉、热风炉、热轧厂等所需燃料,可用副产煤气部分替代天然气,减少煤气放散,降低公司的能耗成本和环境污染。使用副产煤气虽能得益却也面临难题。副产煤气的产量和成分取决于生产和工艺状况,煤气用户必须随之调整其操作。用气设备的启停操作改变了煤气用量,造成煤气管网压力波动,副产煤气成分变化则会引起热值波动,一旦管网压力波动或成分改变,将对管网上用气单元的燃烧过程产生不利影响。针对副产煤气利用的复杂情况,AMB、AMEH和BFI公司开发了高能效利用副产煤气的途径,应用于部分钢铁厂,如:改善煤气管网压力和流量分布的技术,具备供需分布显示和预报功能的煤气管理系统。介绍了煤气管网压力波动控制以及副产煤气利用的结果和经验。     

铰线钢盘条控冷工艺研究

分析绞线钢在控冷过程中水冷段和风冷段传热和相变的数学模型，由现场工艺确定的边界条件，通过大型商用有限元软件Marc／Mentat及二次开发技术，模拟轧后控制冷却过程中水冷线的温度场以及风冷线的温度场和组织场的全过程，并和实际结果对比，对现场生产制定合理的工艺制度、提高产品的综合性能具有重要的指导意义。     

Thermal and mechanical behavior of Al-Si alloy cast using magnetic molding and lost foam processes

Magnetic molding technology is an original alternative process aimed at improving the metallurgical quality and dimensional tolerances of the final components that are currently produced using the lost foam process. The initial development of the magnetic molding process took place at the same time as the lost foam process, more than 30 years ago, but the magnetic moldin process has never achieved the same level of industrial development. The purposes of this study are to introduce the magnetic molding process and to define its advantages and characteristics. The comparative results obtained with both the lost foam and the magnetic molding processes for aluminum casting are given. The main factors involved in the magnetic molding process are also discussed.     

Development of a Robot‐Based Sheet Metal Forming Process

This paper describes a new sheet metal forming process for the production of sheet components for prototypes and small lot sizes. The generation of the shape is based on kinematics and is implemented by means of a new forming machine consisting of two industrial robots. Compared to conventional sheet metal forming machines, this newly developed forming process offers a high geometrical form flexibility, and comparatively small deformation forces enable high deformation degrees. The principle of the procedure is based on flexible shaping by means of a freely programmable path‐synchronous movement of the two robots. The final shape is produced by the incremental infeed of the forming tool in depth direction and its movement along the contour in lateral direction at each level of the depth direction. The supporting tool with its simple geometry is used to support the sheet metal and follows the forming tool at the rear side of the sheet metal. The sheet metal components manufactured in first attempts are of simple geometry like frustum and frustum of pyramids as well as spherical cups. Among other things the forming results are improved by an adjustment of the movement strategy, a variation of individual process parameters and geometric modifications of the tools. In addition to a measurement of the form deviations of the sheet with a Coordinate Measurement Machine, screened and deformed sheets are used for deformation analyses. Furthermore, the incremental forming process is analysed with assistance of the finite element method. In total the results show that a robot‐based sheet metal forming with kinematic shape generation is possible and leads to acceptable forming results. In order to be able to use the potential of this process, a goal‐oriented process design is as necessary as specific process knowledge. In order to achieve process stability and safety, the essential process parameters and the process boundaries have to be determined.     

1种直条棒材生产新工艺

利用高线精轧机的高轧制速度和高速上钢系统的快速制动来生产直条棒材是1种新的棒材生产工艺。结合该新轧制工艺在国内外相关厂家的应用情况,介绍了该工艺的两种典型布置型式,论述了该生产工艺的高速度、高精度、节省投资等优势。     

镁基石灰复合铁水脱硫工艺生产实践

分析了石钢镁基石灰复合铁水脱硫工艺及其脱硫效果,对铁水脱硫后炼钢过程硫含量的变化进行了分析.     

430不锈钢冶炼过程的夹杂物

 在430不锈钢冶炼过程的AOD结束、LF结束及中间包浇注末期分别取钢样,利用扫描电镜和能谱仪分析了夹杂物的类型及形貌特征,并探讨了夹杂物的演变规律及其形成原因。研究得知:随着冶炼过程的进行,钢液中总氧含量有所降低,夹杂物的含量逐渐减少,尺寸逐渐变小。夹杂物类型：AOD中主要为CaO-SiO2-MgO;LF和连铸中间包中主要为CaO-SiO2-MgO-Al2O3,但成分略有不同;中间包中发现有含MnO的夹杂物。AOD末期CaO-SiO2-MgO系夹杂物成分与炉渣成分接近;在LF以及中间包中夹杂物的成分与精炼工艺、保护浇注和钢液温度的降低有关。