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年产200万吨1700热轧带钢生产线工艺设计.doc

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年产200万吨1700热轧带钢生产线工艺设计.doc

学号毕业设计说明书设计题目年产200万吨1700热轧带钢生产线工艺设计学生姓名专业班级成型2班学院冶金与能源学院指导教师i摘要板带材生产技术水平不仅是冶金工业生产发展水平的重要标志,也反映了一个国家工业与科学技术发展的水平。建设现代化的热轧宽带钢轧机要满足现代工业对热轧板品种质量的要求。最终产品的质量取决于连铸坯的质量,传统厚度的板坯连铸工艺明显优于薄板坯连铸工艺。薄板坯连铸连轧更适于生产中低档板材品种,在薄规格产品生产方面具有明显优势。为了满足高质量和高性能板材要求,采用厚板坯常规连轧生产方式更合理1。基于这些考虑,本次设计结合唐钢1700mm、本钢1700mm、宝钢1580mm、鞍钢1780mm热轧生产线设计了200万吨的1700mm常规热连轧生产线。在此设计中详细地介绍了加热、粗轧、热卷取、精轧、冷却、卷取等一系列过程。其中精轧机选用六架大断面牌坊和高吨位轧制力轧机,采用PC轧机、工作辊正弯辊(WRB)技术和厚度自动控制(AGC)等技术来控制板型和厚度。另外,为提高轧件温度,减少头尾温差,在精轧前采用无芯轴隔热屏热卷箱。设计中涉及的技术参数大部分取自现场的经验数值,用到的部分公式也是来自于实际的经验公式。关键词常规热连轧热卷箱层流冷却厚度自动控制iiABSTRACTThehotstripproductiontechniquelevelnotonlyisaimportantmarkingofthemetallurgyindustryproducedevelopmentlevel,butalsoreflectalevelofthenationalindustryandsciencetechnique.Thenewmodernizationalhotwiderollingmillsshouldsatisfytherequestofmodernindustrytohotstripspeciesquality.Thequalityofendproductisbyallmeansdecidedbyqualityofcontinouscastingslab.Thecontinouscastingslaboftraditionalthicknessisobviouslybetterthanthinslabcontinouscastingandrolling.Thinslabcontinouscastingandrollingissuitabletoproducemediumlowfiletimeplankmaterialspeciesandhaveobviousadvantageatthethinspecificationproduct.Forsatisfyingtherequestofobtainingthehighqualityandhighperformancestrip,thickslabcontinouscastingproducemethodisconsideredmorereasonable1.Basedontheabovepremise,thisdesigncombineTangsteel1700,Bensteel1700,Baosteel1580andAnsteel1780hotrollingproductionlinetodesign2.0milliontontraditionalhotcontinuousrollingworkshop.Inthispaperitisdetaillyintroducedtheheatfurnace,theroughrolling,thehotcurl,thefinishrolling,thelaminarcooling,thecurlandsoon.Amongthem,Thefinishingmillstillselectedthebigcrosssectionmemorialarchandthehightonnagerollingstand,andchoosedPCmill,workrollbendtechniqueandautomaticgaugecontroltocontrolstripshapeandthickness.Moreover,inordertoraisethetemperatureofrollingmetalandreducethedifferencetemperaturebetweentailandheadofrollingmetal,Iestablishahotcurlboxbetweentheroughrollingandthefinishingrolling.Thecoefficientinthisdesignandpartsofformulascomefromactualexperience.Keywordsconvensionalcontinuousrolling,thelaminarcooling,automaticgaugecontrol目录引言...................................................................................................................................11文献综述...........................................................................................................................21.1热轧板带钢发展历史.................................................................................................21.1.1热轧板带钢生产的发展史.................................................................................21.1.2我国热轧板带钢生产的发展史.........................................................................21.2热连轧技术的发展现状.............................................................................................31.2.1带钢生产技术的进步.........................................................................................31.2.2热带钢装备技术进步.........................................................................................51.3我国热轧板带钢发展趋势.........................................................................................51.3.1近代热轧板带钢生产技术发展的主要趋向.....................................................51.3.2我国热带轧机的发展趋势.................................................................................61.4热轧板带钢的生产工艺及其特点.............................................................................71.4.1常规热连轧工艺.................................................................................................71.4.2薄中,厚板坯连铸连轧工艺...........................................................................71.5热轧板带新生产工艺对轧机装备的要求.................................................................81.5.1板形、板厚控制技术在新生产工艺中的应用.................................................81.5.2除鳞技术的发展.................................................................................................92建厂依据及产品大纲.....................................................................................................102.1建厂依据...................................................................................................................102.1.1可行性研究.......................................................................................................102.1.2地理与资源.......................................................................................................102.2产品大纲...................................................................................................................112.2.1坯料...................................................................................................................112.2.2产品规格...........................................................................................................122.2.3钢种方案...........................................................................................................123车间布置及主要设备选择.............................................................................................133.1车间布置及设备选用的原则...................................................................................133.2主要设备选择...........................................................................................................133.2.1板坯宽度侧压设备...........................................................................................133.2.2轧制总道次的确定...........................................................................................183.2.3粗轧机...............................................................................................................183.2.4保温装置...........................................................................................................223.2.5精轧机...............................................................................................................243.2.6压下装置...........................................................................................................293.2.7活套装置...........................................................................................................304典型产品压下规程设计.................................................................................................314.1概述...........................................................................................................................314.2各道次出口厚度及压下量的确定...........................................................................324.2.1粗轧机的压下量分配原则...............................................................................324.2.2精轧机的压下量分配原则...............................................................................324.2.3综合分析...........................................................................................................334.3轧机咬入的校核.......................................................................................................334.4确定轧制速度制度...................................................................................................344.4.1粗轧机速度制度...............................................................................................344.4.2精轧机速度制度...............................................................................................354.4.3加减速度的选择...............................................................................................364.5确定轧制温度制度..................................................................................................374.5.1粗轧各道次温度确定.......................................................................................384.5.2精轧各道次温度确定.......................................................................................384.6力能参数的计算.......................................................................................................384.6.1轧制力的计算和空载辊缝的设定...................................................................384.6.2轧制力矩的计算...............................................................................................414.6.3附加摩擦力矩的计算.......................................................................................434.6.4空转力矩的计算...............................................................................................444.6.5动力矩的计算...................................................................................................454.7层流冷却对温度的控制及大致的冷却速率的确定...............................................465轧辊强度和主电机能力的校核.....................................................................................475.1轧辊强度的校核.......................................................................................................475.1.1支撑辊的校核...................................................................................................475.1.2工作辊的校核...................................................................................................485.1.3工作辊与支撑辊间的接触应力.......................................................................515.2主电机能力的校核...................................................................................................535.2.1轧制过程中静负荷图的制定...........................................................................535.2.2主电机的校核...................................................................................................546年产量的计算及轧制图表.............................................................................................566.1轧钢机年产量的计算...............................................................................................566.1.1轧钢机年产量的计算.......................................................................................566.1.2轧钢机平均小时产量的计算...........................................................................576.1.3轧钢车间年产量的计算...................................................................................576.2轧钢机工作图表的制定...........................................................................................586.2.1轧制图表的基本形式及其特征.......................................................................596.2.2轧机工作图表的制定.......................................................................................607辅助设备的选择.............................................................................................................617.1加热炉的选择...........................................................................................................617.1.1加热能力的确定...............................................................................................627.1.2炉子数量的确定...............................................................................................637.1.3炉子尺寸的确定...............................................................................................637.2除磷装置的选择.......................................................................................................647.2.1除磷的必要性...................................................................................................647.2.2各种除磷方式的比较.......................................................................................647.2.3本次设计除磷装置的选择...............................................................................647.3剪切设备的选择.......................................................................................................657.4带钢冷却装置...........................................................................................................677.5卷取设备的选择.....................................................................................................687.6辊道的选择.............................................................................................................707.7活套支撑器...............................................................................................................717.7.1概述...................................................................................................................727.7.2活套支撑器的相关参数的计算.......................................................................727.8控制设备...................................................................................................................747.8.1厚度控制...........................................................................................................747.8.2板形控制...........................................................................................................757.8.3宽度控制...........................................................................................................768轧钢车间平面布置及经济技术指标.............................................................................798.1轧钢车间平面布置...................................................................................................798.1.1轧钢车间平面布置的原则...............................................................................798.1.2金属流程线的确定...........................................................................................798.2车间技术经济指标...................................................................................................808.2.1各类材料消耗指标...........................................................................................808.2.2综合技术经济指标...........................................................................................839分析可行性及介绍设计优势.........................................................................................86参考文献.............................................................................................................................89致谢.................................................................................................................................91

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