河北联合大学QINGGONGCOLLEGE,HEBEIUNITEDUNIVERSITY毕业设计说明书设计（论文）题目：选矿厂矿石破碎S7-300PLC控制系统梯形图软件设计学生姓名：+++学号：+++++++++专业班级：++++++学部：+++++指导教师：+++教授2012年05月23日摘要选矿厂集中控制系统是指运用各种自动控制技术完成破碎筛分、磨矿分级、选别、脱水、过滤及精矿和尾矿的输送等选矿作业的控制系统。稳定性、准确性是系统必备的要素。该系统在工业生产中常以单片机或者可编程控制器（PLC）来完成控制功能。然而，以单片机实现的控制系统在安全、可靠及抗干扰的性能上要稍逊色于PLC。为此，在工业生产中大力开发使用PLC完成控制功能的选矿厂自动控制系统是非常必要的。本设计正是完成基于PLC为控制器的选矿厂综合自动化系统设计[1]。随着计算机、网络、数据库等相关技术的不断发展和完善，自动化系统得到极大的完善。本设计中以S7—300PLC为核心控制器，着重说明了选矿厂破碎和磨矿两个环节的控制流程、控制系统硬件配置、梯形图程序设计及整体系统的调试等情况。PLC的应用极大地提高了选矿产品的质量和生产效率，在整个选矿行业具有广阔的应用前景。关键词：选矿自动化，S7-300，PLC，破碎AbstractConcentratorcentralizedcontrolsystemistheapplicationofautomaticcontroltechnologyreferstothecompletionofcrushingandscreening,grindingandclassification,sorting,dewatering,filtrationandtailingsconcentrateandmineralprocessingoperations,suchasthetransmissionofthecontrolsystem.Stability,accuracyisanessentialelementofthesystem.Thesystemisofteninindustrialproductionorasingle-chipprogrammablelogiccontroller(PLC)tocompletecontrol.However,single-chipcontrolsystemtoachievesafe,reliableandanti-jammingperformanceslightlyinferiortothePLC.Forthisreason,inindustrialproductionandvigorouslydeveloptheuseofPLCcontrolfunctionstocompletethespeedbatchingsystemisverynecessary.ThisdesignispreciselycompletesbasedonPLCiscontroller'soredressingplantsynthesisautomatedsystemdesign.Alongwiththecomputer,thenetwork,thedatabaseandsooncorrelationtechniquedevelopsunceasinglyandconsummates,theautomatedsystemobtainstheenormousconsummation.ThisdesignemphasizedtheSTEP7softwaretoselect,installment,trapezoidalchartprogrammingandintegratedsystem'ssituationsandsoondebugging.ThePLCapplicationimprovedtheproductqualityandtheproductionefficiencyenormously,hasthebroadapplicationprospectintheentiredressingprofession.KeyWords：Automationofmineralprocessing，S7-300，PLC，Fracture目录摘要.............................................................................................................................IAbstract..........................................................................................................................II1绪论............................................................................................................................11.1选矿自动化系统简介...........................................11.2选矿自动化的过程简述.........................................11.2.1破碎过程自动化.....................................................................................11.2.2磨矿过程自动化.....................................................................................21.2.3磁选过程的自动控制.............................................................................21.2.4浓缩过程自动控制系统.........................................................................21.2.5精矿传送控制系统.................................................................................22可编程控制器的介绍.........................................
