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时间:2020-04-17
《阿拉善选煤厂降低介耗的措施.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、阿拉善选煤厂降低介耗的措施高磊(唐山湾生态城规划建设局,河北唐山063200)摘要:阐述了阿拉善选煤厂主要存在磁铁矿粉质量不达标,原煤中矸石含量大,脱介设备超负荷运行,脱介筛设计不合理,煤泥中黏土矿物含量大和加药方式不合理等问题。针对存在的问题,通过指标化验、定期检查、生产抽查等,严格控制磁铁矿粉质量;及时定做合适的底流排料口,定期调整中心管的插入深度,安装防堵塞自动报警装置;在中煤脱介弧形筛前增加固定筛,调整磁选工况参数,适当调整磁选机磁偏角;增大喷水压力,增加喷水管和筛面挡板,调整脱介筛筛网孔径及筛板;通过分流装置控制悬浮液中煤泥含量,使其保持在40%左右;改进凝聚剂及絮凝剂的加
2、药点及加药制度等措施对选煤厂进行改造。改造完成后,选煤厂磁选机磁选效率达到99.9%;介耗由5.04kg/t降至2.00kg/t,降低了3.04kg/t;洗水质量浓度由原来的l5L变为5L以下;精煤产品质量实现了9.5%~l1.5%有效可调;每年可节约生产成本280万元,创造经济效益1500万元。关键词:介耗;重介质悬浮液;磁铁矿粉;煤泥水;分流量;脱介效率中图分类号:TD94文献标识码:A文章编号:1006—6772(2013)03—0038—04MediumconsumptionreducingmeasuresforAlxacoalpreparationplantGA0Lei(T
3、angshanwanEco—cityPlanandConstructionBureau,Tangshan063200,China)Abstract:TherewerelotofproblemsinAlxacoalpreparationplant,thequalityofmagnetitepowdercouldntreachthestandard,largeganguemixedinrawcoal,themediumdrainingequipmentswasoverranbylargesuspension,thedesignofsprayingscreenanddosagingmeth
4、odwasunreasonable,claymineralsinslimewerelarge.Toresolvetheseproblems,controlthemagnetitepowderqualitybytestingindex,inspectingregularly,examiningtheproductsselectively.Preparesuitabledischargingoutletforunderflow,adjusttheinsertdepthofcentraltuberegularly,installanti—cloggingautomaticalarmdevi
5、ce,addstationaryscreeninfrontofsievebend,adjusttheapplicationparameterandmagneticdeclinationofmagneticseparator,increasesprinklingpressure,addsprinkingtubeandscreenbaffle,adjustscreenapertureandplate,stabilizetheslimecontentinsuspensionaround40percentthroughshuntdevice,transformthedosagingspots
6、andmeasuresofflocculantandcoagulant.Aftertransformation,theeficiencyofmagneticseparationreachesupto99.9percent,themediumconsumptionreducefrom5.04kg/tto2.00kg/t,thecirculatingwaterconcentrationreducefrom15g/Ltolessthan5g/L,thecleancoalqualitycanbecontrolledinarangeof9.5percentto11.5percent,savec
7、ost2.8xl0。yuantheeconomicbenefitsis1.5x10yuanperyear.,Keywords:mediumconsumption;densemediumsuspension;magnetitepowder;slimewater;flowrate;mediumdrainingefficiency收稿日期:2013—03—20责任编辑:白娅娜作者简介:高磊(1985一),男,河北唐山人,助理工程师,现在河北唐山湾生态城规划建设局
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