宝钢5 m宽厚板轧机工艺装备及试生产实践

为满足中国造船工业的发展及石油天然气输送管道建设大量高等级宽厚板的需求,宝钢决定建设5 m宽厚板轧机.该轧机采用了高性能设备参数,采用计算机控制,一期建设1架精轧机,设计年产量140万t,现在已顺利实现月达产.介绍了该宽厚板轧机平面布置、生产工艺,并论述了所采用的技术,包括控轧控冷(TMCP)技术、厚度控制技术、平面形状控制技术、板形控制技术,同时介绍了热负荷调试进程及试生产结果.     

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.     

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。     

加速建设厚板轧机使板管比突破60％

概述了国内厚板生产和需求现状,指出我国厚板生产与国外相比,存在有厚板原料连铸比低;厚板质量差,品种不全;工艺落后,消耗高;厚板轧机装机水平低,轧辊尺寸小;自动化水平低,辅助设备陈旧等差距,很难适应国民经济发展的需要。预计到1995年我国中厚板消费比例可达到13.8%(1080万t),2000年可达到13.9%(1320万t)。为此我国应加速建设宽厚板轧机。鞍钢“八五”期间应尽早建成4300mm厚板轧机,届时可扩大品种,提高质量,并能基本适应国民经济各部门对宽中厚板的需求。     

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。     

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.     

萍钢30万t棒材工程试产成功

萍乡钢铁厂30万t棒材工程投入试生产以来,最高日产已达451t。该工程主要产品是12～32mm的螺纹钢和圆钢。采用半连续轧制工艺,粗轧机组利用部分闲置设备550三辊轧机和1600kW电机配套而成,中轧机组采用7架高刚度轧机,精轧机组采用6架平立交替的SY型高刚度轧机。该工程电...     

厚板轧制控冷工艺和装置的探讨

厚板的快速冷却技术是80年代国外开发的新技术,它对提高厚板质量、降低合金含量和扩大厚板品种有着极为重要的作用,因此80年代以来发展迅速,其中日本居领先地位。本文介绍了日本的先进技术、繁多方法及各大钢铁公司各自开发的独特技术,对鞍钢建设年产200万 t 的厚板厂提供了可以借鉴的技术。     

现代厚板生产工艺技术及工艺装备技术

综合论述了现代厚板生产产品品种、工艺流程及工艺参数、厚板热处理工艺及参数,厚板生产厂工艺布置及示例,厚板轧机主要参数、厚板控制轧制及控制冷却技术,厚板厚度控制、板形控制、平面形状控制等尺寸精细化控制技术。     

现代厚板生产工艺技术及工艺装备技术(续)

论述了现代厚板生产产品品种、工艺流程及工艺参数,厚板热处理工艺及参数,厚板厂工艺布置及示例,厚板轧机主要参数、厚板控制轧制及控制冷却技术,厚板厚度控制、板形控制、平面形状控制等尺寸精细化控制技术。     

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。     

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.     

宝钢宽厚板试样剪液压回路及剪切缸剪切能力分析计算

介绍宝钢宽厚板试样剪的主要技术参数、构成及工作原理;着重对主剪切缸液压回路特点进行了分析,对主剪切缸剪切能力进行了详细校核。本文对厚板厂类似的压平机设备的维护及改造也有指导意义。     

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。     

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.     

国外厚板生产线工艺及设备特点

本文介绍了国外5000mm左右轧机厚板厂的装备情况,并对板坯热送、板形控制、控轧控冷、超声波探伤及热处理等生产技术的发展情况进行了论述。