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fs20">技术丨矿渣立磨磨内易磨损部位的维护方法</h1> <h3 class="tac"><span>来源?a href='http://www.butchmeth.com/news/31.html'>http://www.butchmeth.com/news/31.html</a></span><span>发布时间?017-03-29</span></h3> <div id="6l6te1iz" class="con mt10 fs14"> <p><p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <br /> </p> <span style="font-size:14px;"><span style="color:#974806;font-size:14px;"><strong><span style="line-height:1.75em;"><span style="font-size:24px;"><strong>矿渣<b>立磨</b>磨内</strong></span><span style="font-size:18px;"><strong>易磨损部位的维护方法</strong></span> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <br /> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;">近几年,众多水泥企业和钢铁企业引进矿渣立磨研磨微粉,较好地实现了矿渣的综合利用。但由于立磨内部耐磨损件的磨损情况较难掌控,其严重磨损易引起重大停机事故,给企业带来不必要的经济损失,所以,维护磨内易磨件是检修的重点。我公司经过多年对矿渣立磨的研究和运用发现,磨内磨损情况直接关系到系统的产量和产品质量。磨内关键的耐磨部位为:分选器动、静叶片、磨辊和磨盘以及配风口的百叶环。若能对这三大部位进行预防性的维护和修整,不但可以提高设备的运转率和产品的质量,且能避免许多重大设备故障的发生?br /> <br /> <span style="color:#974806;font-size:14px;"><strong>1 矿渣立磨的工作原?/strong></span></span> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;"><span style="color:#974806;"><span style="line-height:28px;"><strong><br /> </strong></span></span><span style="line-height:1.75em;">电机通过减速机带动磨盘转动,热风炉提供热源,从进风口进入磨盘下方的入口,然后通过磨盘周围的风环(配风口)进入磨机。物料从进料口落到转动的磨盘中央,被热风烘干,在离心力的作用下,物料向磨盘边缘移动,并被啮入磨辊底部而粉碎。粉粹后的物料继续在磨盘边缘移动,在风环处被高速向上的气流带起?~12 m/s),大颗粒被折回到磨盘,合格的细粉随气流通过分选器进入收集器。整个过程归纳为:喂料—烘干—研磨—选粉这四个步骤?/span><br /> </span> </p> </span></strong></span></span> <p> <span style="font-size:14px;"><span style="color:#974806;font-size:14px;"><strong><span style="line-height:175em;">2 磨内主要易磨损部位及维护方法</span></strong></span></span><span style="font-size:14px;"><br /> <strong><span style="line-height:1.75em;"><img style="width:374px;height:523px;" alt="" src="/uploads/image/20170329/20170329160545_6869.jpg" width="469" height="833" /></span></strong></span> </p> <p> <span style="font-size:14px;"><strong><span style="line-height:1.75em;">2.1 定修时间的确?/span></strong><br /> <span style="line-height:1.75em;">经过喂料、烘干、研磨、选粉四个步骤,磨内物料在热风的带动下对所经之处进行磨损,时间越久,风量越大,磨损越严重,特别是在生产中起重要作用的部位是风环(配风口)、磨辊和磨盘以及分选器。这几个起烘干、研磨和收集的主要部位也是磨损较严重的部位。对磨损情况掌握越及时,修复起来越方便,检修中也可以节省很多工时,可提高设备的运转率,增加产量。以我公司LOESCHE立磨为例,起初,除中途出现紧急故障外,还以月定修为主要检修和维修周期。由于运行中,产量不仅受到风量、温度和磨损的影响,也会有其它的因素,为便于及时排除隐患,由月定修改为半月定修。这样,无论中途有无其它故障,均以定修为主,在定修中大力排查故障隐患和重点磨损部位,及时修复,以确保在15天的定修周期内设备实现零故障运行?/span></span> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;"><span style="line-height:24.5px;"><br /> </span><strong><span style="line-height:175em;">22 配风口百叶环的检查与维修</span></strong><br /> <span style="line-height:1.75em;">配风口百叶环(图1)均匀地引导流出环状管道的气体进入到研磨室,百叶环叶片的角位对研磨室内研磨原料的循环有影响作用。检查配风口百叶环靠近磨盘处,上沿与磨盘间隙应在15 mm左右,如磨损严重,需焊补圆钢缩小间隙;同时,检查侧板厚度,内侧板为12 mm,外侧板?0 mm,当磨损50%后,需用耐磨板焊补;重点检查磨辊下方百叶环,如果发现配风口百叶环整体磨损严重,大修时,整体更换?/span><br /> </span> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;" align="center"> <span style="font-size:14px;"><span style="line-height:1.75em;"><img alt="" src="/uploads/image/20170329/20170329160707_6848.jpg" /></span></span> </p> <p style="text-align:center;color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <a target="_blank"></a> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <br /> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;">由于配风口百叶环下部为更换叶片的主要空间,且叶片为耐磨件,不仅重,且数量达20片,在风环下部的风间内更换,需焊接滑道,并需吊装设备协助完成。所以,在定修中对配风口磨损部位进行及时焊补,对叶片进行角度的调整,可以有效地减少更换叶片次数。根据整体耐磨情况,每半年整体更换一次即可?/span> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;"><span style="line-height:28px;"><br /> </span><strong>2.3 磨辊、磨盘的检查与维修</strong><br /> <span style="line-height:1.75em;">矿渣立磨一般由主辊和辅辊组成,主辊起研磨作用,辅辊起布料作用。我公司矿渣立磨,共有三个主辊和三个辅辊。由于有可能在辊套或磨盘局部区域出现密集的磨损,有必要通过在线焊接来重新处理。焊接作业是在磨机内部用移动式焊机来完成,不需要拆除研磨板。根据生产商提供的经验,当磨损的槽口?0 mm深时就要进行重新焊接。若辊套出现裂痕,必须及时对辊套进行更换?/span><br /> <span style="line-height:1.75em;">磨辊(图2)的辊套耐磨层一旦损坏、脱落,将直接影响对产品的研磨效率,降低产量、质量,若未能及时发现脱落物,将直接导致另外二个主辊损坏。每个辊套损坏后需要更换新辊套,更换新辊套的工作时间根据工作人员的经验和熟练度以及工具的准备情况来决定,快?2小时,慢?4小时或更长。对于企业来说,经济损失很大,包括新辊套的投入和停产造成的损失。所以以半月为定修周期,对辊套和磨盘进行及时的检查,发现耐磨层厚度降?0 mm,应立即组织安排相关修复单位进行现场焊补。一般对磨盘和辊套的修补在三个工作日内,即可对立磨整条生产线进行系统检查维修,由于计划性强,能有效地保证相关工作的集中开展?/span><br /> <span style="line-height:1.75em;">另外,在对磨辊和磨盘的检查过程中,也要对磨辊的其它附着件,如连接螺栓、扇形板等进行仔细检查,以防连接螺栓等磨损严重连接不牢固而在设备运转中脱落,从而导致严重的磨辊、磨盘耐磨层卡损事故?/span><br /> </span> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;" align="center"> <span style="font-size:14px;"><span style="line-height:1.75em;"><img alt="" src="/uploads/image/20170329/20170329160730_8051.jpg" /> </span></span> </p> <p style="text-align:center;color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <a target="_blank"></a> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <br /> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <strong><span style="font-size:14px;">24 分选器动、静叶片的检查与维修</span></strong><span style="font-size:14px;"><br /> LOESCHE双头螺栓连接篮式分选器是一种空气流通式分选器,经研磨和烘干后的物料从下部随气流一起进入到分选器中。经收集的物料通过叶片间隙进入上部收集通道,不合格的物料被叶片挡回,或由自身重力回落到下部研磨区经二次研磨。分选器内部主要是大型鼠笼式结构(图3)的回转仓,外部隔板上有静止的叶片,与转动的鼠笼上的叶片形成回转流,收集粉料。如果动、静叶片焊接不牢固,在风力和回转力作用下,易掉落到磨盘内,卡住磨内的辊压设备,造成大的停机事故,因此,对动、静叶片的检查是磨内检修的重点之一?br /> </span> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;"><br /> </span> </p> <p style="text-align:center;color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <a target="_blank"><img alt="" src="/uploads/image/20170329/20170329160748_7929.jpg" /></a> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <br /> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;">分选器内部鼠笼式回转仓中,有动叶片共计三层,每?00片。在定修时,需要逐一用手锤振动动叶片,看其是否有活动现象,如有,需紧固、做好记号并集中焊接加固。如发现有磨损严重、变形的叶片,需要拆除,并按图纸要求,安装新的尺寸相同的动叶片,且安装前需要称重,以防失去平衡?br /> 检查静叶片,需从鼠笼内部拆除每层五片动叶片,以留出足够空间观察静叶片的连接情况和磨损情况,转动鼠笼,检查静叶片的连接处是否有开焊或磨损情况,所有耐磨件需用J506/Ф3.2焊条焊牢。调整静叶片角度,垂直间?10 mm,水平角?7°,以保证选粉质量?br /> 每次检修时,进入选粉机观察静叶片角度是否变形,动叶片是否松动,一般两个挡板间隙距离为13 mm。定检中,不可忽视转子轴连接螺栓,检查其是否有松动,还应清除粘附在转动部件上的研磨料,检查完毕须做整体动平衡?br /> <br /> <span style="color:#974806;font-size:14px;"><strong>3 结束?/strong></span></span> </p> <p style="color:#3E3E3E;text-indent:0px;background-color:#FFFFFF;"> <span style="font-size:14px;"><span style="color:#974806;"><span style="line-height:28px;"><strong><br /> </strong></span></span><span style="line-height:175em;">矿粉生产线中,主机设备的运转率直接影响着产量和质量,检修主机是企业设备维护的重点。对于矿渣立磨,有针对性、有计划性的检修,不疏漏立磨内部重点耐磨部位的隐患排查,做到提前预知预控,将隐患提前排除,可防止重大事故发生,提高设备的运转率和台时产量,为生产线高效低耗运行提供保障?</span></span> </p> <br class="Apple-interchange-newline" 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