宝钢5m厚板轧机工程建设及试生产

中国造船工业的发展及国内石油天然气能源输送管道建设需要大量高等级厚板,为满足上述需求,宝钢建设了5 m厚板轧机.该轧机采用了高性能设备参数,采用计算机控制,一期建设一架精轧机,设计年产量140万t,于2005年3月1日开始试生产,目前月产量达12万t.文章概要介绍该厚板轧机平面布置、生产工艺,并论述了所采用的高精度轧制厚度控制技术、平面形状控制技术、板型控制技术等新技术,及试生产实绩.     

特宽厚板轧机的发展与重机制造业的任务

概要介绍近期特宽厚板轧机的发展 ,及为满足控轧新工艺要求和提高钢板轧制精度 ,主机和辅机的技术进步。对我国建设第一套 50 0 0mm特宽厚板轧机提出了初步设想     

宝钢5m宽厚板轧机采用的技术及装备

介绍了宝钢5 m宽厚板轧机的概况,论述了该套轧机采用的技术及装备.     

国产化3800mm宽厚板轧机的设计特点

简要介绍我国宽厚板轧机的建设态势,以一套在建的全国产化3800mm宽厚板轧机为例,从工程概况、生产工艺流程和特点、主要设备选型及工艺平面布置等各个方面,介绍了该宽厚板轧机的特点,展望了我国宽厚板轧机未来的发展趋势。     

首秦4300mm宽厚板工程顺利推进

4300mm宽厚板项目是首秦公司形成铁、钢、材生产配套，实现完整工艺流程的关键项目。工程采用了板型控制、控冷和控轧等10余项世界先进、国内一流的技术工艺及设备，产品质量和性能均为国际一流，是当前国内最大、技术最先进的宽厚板轧机工程。它的开工建设，对建设首秦公司高级别宽厚板生产基地具有积极作用。     

国外厚板轧机及轧制技术的发展

介绍了国外宽厚板轧机的发展现状,厚板轧制中高精度轧制、平面形状控制、控轧控冷3项主要技术的发展水平,以及国外厚板生产中四辊可逆式轧机、加速冷却装置、矫直机、冷床、剪机、自动控制等重要技术装备的水平。     

厚板轧制平面形状控制和立辊轧制技术

本文介绍了国外厚板轧机轧制厚板的平面形状控制技术、采用立辊的轧制技术,及其应用效果。目的在于使我国在厚板轧机设计和生产中借鉴。     

基于工程设计的热轧宽厚板轧制规程计算系统的开发及应用

结合宽厚板轧机生产工艺特点及工程设计需要,开发了宽中厚板轧制规程计算软件,对宽厚板轧机轧制过程温度及力能参数计算模型公式的选用、计算方法及编程过程等进行了介绍。采用本软件计算的宽厚板轧制规程实例与工厂实际生产过程轧制规程进行了对比,两者计算结果比较一致。在现代宽厚板轧机工程设计中,采用该软件可获得合理准确的轧制规程,在轧机设备选型、轧机产能计算、极限规格产品轧制能力及轧机电气传动系统设计方面均具有重要的意义。     

X80宽厚板机械性能与组织形态

根据西气东输二线X80宽厚板的技术条件和首钢4300mm轧机生产线的特点,开发了具有良好低温韧性的X80宽厚板。并对开发的22mm厚X80宽厚板的成分设计、工艺特点和控轧控冷工艺进行了详细介绍,并对开发的X80宽厚板及用其制造的钢管也进行了相关的机械性能检验．结果表明：首钢开发的22mm厚X80宽厚板以针状铁素体组织形态为主,其强度和韧性较高,完全满足西气东输二线X80宽厚板的标准要求。     

鞍钢5500 mm宽厚板轧机技术及装备概述

介绍了鞍钢5500mm宽厚板轧机的主要装备和工艺概况,包括新产线的生产规模、产品品种及所应用的先进技术等。重点介绍了控轧控冷等工艺在新产线的应用情况,同时对所应用的主要装备及相关参数进行了简要叙述。     

Independent integration practice on revamping 4200/3500 mm medium and heavy plate rolling mill of Bayi Steel in terms of process and make-up equipment

This study systematically reviews and summarizes relocation and revamping project of medium and heavy plate rolling mill in Bayi Steel.After detailed analysis was made on the main deficiency and problems of the original production line of Pudong Steel,systematical integration and improvement for the process and equipment were carried out accordingly.Through innovative practice of integration,Baosteel Engineering has greatly improved the technical process and equipment make-up,as well as the grades and quality of the products.The original man-operating line is redesigned into an automatic system controlled by Level 2 computer,reaching the advanced technical level of home-made medium and heavy plate production line in recent years.The project is constructed in two phases;The original product mix of Pudong Steel is maintained as much as possible in Phase I.After 3 500 mm single stand finishing mill is put into operation, capacity of hot- rolling medium and heavy plate reaches 650 000 t/a,with the maximum thickness at 40 mm.Equipment or facilities are reserved for production of pipeline steel and other grades.Pipeline steel, vessel plate,wind power plate and other TMCP and heat treatment products are projected in PhaseⅡ.After 4 200 mm roughing mill and its matched facilities are put into operation,capacity of hot-rolling medium and heavy plate will reach 120 000 t/a,with the maximum thickness at 80 mm.Through the optimization of process equipment and its function,the relocated medium and heavy plate mill production line has reached advanced level among similar domestic mills.The prominent achievements of the project are the revamping of thickness control system of the finishing mill and the newly installed shape control system.Automation control of the whole line is realized.     

临钢在建3 300 mm中厚板轧机的市场前景分析

本文分析了我国近几年中厚板的市场及产能状况,介绍了临钢在建3300mm轧机的力能参数及配置水平,分析和预测了在建中厚板轧机的市场空间。     

宝钢5m厚板轧机投产三年回顾

具有当代世界先进水平的宝钢5m厚板轧机于2005年3月1日一次试轧成功.投产三年以来,宝钢分公司厚板厂组织学习、跟踪当今世界厚板工艺技术,并在实践中摸索厚板生产、质量控制等方面的特有规律,逐步熟练驾驭这套现代化厚板轧机,使分公司厚板产能逐年提升,2007年完成交库量141万t,顺利实现年达产.在提升产能的同时,宝钢分公司注重开发厚板工艺及新产品,迄今宝钢厚板产品已形成船板、管线板、锅炉和压力容器用板、桥梁及建筑用板等系列.     

板形控制在莱钢宽厚板的应用

板形控制是宽厚钢板生产的一个关键因素,板形控制的好坏直接决定到毛边板的边部和头尾的剪切量,其控制精度对确保钢板质量和提高成材率是极其重要的。本文以莱钢4300mm宽厚板为例介绍板形控制技术和模型的应用,为轧机的钢板板形的控制提供了借鉴依据。     

舞钢4200mm轧机易地改造的必要性和可行性分析

本文从宽厚板轧机装备水平的进步、企业生产能力和上下工序匹配及开发新产品、积极抢占高端市场的需要出发，综合论述了易地改造4200mm轧机、建设5000mm宽厚板生产线的必要性和可行性。     

中厚板坯料尺寸自动控制研究

中厚板生产的特点是批量小、规格多,因此坯料尺寸的设计对生产效率、成材率有着重要的影响。采用自动控制的方法进行快速准确的坯料设计是适应现代化中厚板生产的有效手段。通过分析中厚板厂的加热炉、轧机、冷床和剪切设备的参数并辅以计算机程序设计,可以实现坯料尺寸自动控制。     

现代宽厚板厂计算机控制系统

根据现代宽厚板厂生产特点,从管理和控制结合的角度分析了计算机自动化系统在宽厚板厂中的必要性,此系统分为生产管理级,生产控制级,过程控制级和设备控制级四级,并阐述了宽厚板厂从板坯库轧制区,剪表整区到成品库全区域内自动化系统的功能;描述了该系统通过各级计算机的管理和控制在从合同定单,生产计划开始,至生产成本合格产品的过程中各个主要环节里所起的作用,最后结合国内外应用实例,列举了采用计算机控制系统所取得     

Algorithm research of the SQP method used in roll schedule calculation for Baosteel’s 5m heavy plate

Loading distribution for heavy plate mill is to find optimal control solutions under the granted performance indicators and constraints including mill capacity and hypothesis of rolling models.The solutions are quite different for different performance indicators.In the article,the performance indicators and sequential quadratic programming(SQP for short below) methods employed in 5 000 mm heavy plate mill of BaoSteel are penetratingly analyzed.Generally,the SQP method is an effective and fast way to solve the nonlinear programming problems with small or medium scale constraints.Early in 1976,Han put forward the SQP method for the first time and Powell made it perfect and accomplished the algorithm in 1977.In fact, SQP method was to turn a nonlinear programming problem to a series of sub set of quadratic programming problems.In the algorithm,each iteration step is to solve one quadratic programming problem.The optimal solutions will be gradually approached after quadratic programming problems were totally solved.When solving the quadratic programming problem,the active set strategy were employed which turned the constrained quadratic programming problem to unconstrained quadratic programming problem.The active set strategy made the whole quadratic programming problem be solved by a least square problem.And finally, the matrix of the least square problem would be decomposed by Q matrix and R matrix.After Q matrix and R matrix were obtained,the optimal solutions would be finally found.For loading distribution,the performance indicators were composed by plate shape and draft of each pass.Plate shape is represented by rolling force gradually reduced pass by pass with a tunable factor.The mill capacity is another performance indicator represented by draft of each pass.For heavy plate mill,the mill capacity here is the motor moment. For heavy draft,the motor would be overloaded especially for the first several passes;for small draft,the motor would be loaded slightly.All these would not be permitted to happen when calculating the loading distribution.The mill capacity indicator made the loading of mill just be in the middle,not too much and not too low.In the article,these two performance indicators were analyzed in detail.Examples of loading distribution results with different performance indicators were given by the SQP method.When making changes to the performance indicators,there would be different solutions to the loading distribution.For the optimal solutions to the mill,there was supposed to make changes to the factors of the performance indicators or upgrade the accuracy of the mathematical models of the rolling process.