安家岭选煤厂末排矸系统平衡及降低介耗的途径.pdf

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1、中国科技核心期刊全安家岭选煤厂末BEfiT系统平衡及瞻低介耗的途径，王正书(中煤平朔煤业有限责任公司，山西朔州036006)摘要：介绍了安家岭选煤厂末排矸系统工艺流程和设计特点。针对末排矸系统存在的系统不平衡，介耗高，处理量低，混料桶位、密度波动大，分流量大，磁选机液位不稳等问题，从改造末煤弧形筛，改造4、5系统，改造磁选机来料分配箱，完善清扫水系统，更换粉原煤弧形筛筛板和板框压滤机6个方面对安家岭选煤厂进行了技术改造。最后对选煤厂技改效果进行了分析，结果表明：技改后选煤厂介耗由2．5kg／t降至1．2k

2、g／t，水耗由0．12m／t降至0．08m／t：末煤排矸发热量达到21．77MJ／kg，吨煤售价增加200元，系统得以连续生产，中煤质量稳定；选煤厂每年节约清水20．8万m，节约磁铁粉6760t，全年节省磁铁矿粉费用439．4万元，经济效益显著。安家岭选煤厂技改突破了设计常规，对选煤厂生产技术管理及选煤厂设计具有很好的借鉴作用。关键词：末排矸；系统平衡；介耗；混料桶；煤泥水；应用效果中图分类号：TD94文献标识码：A文章编号：1006—6772(2012)02—0017—03Researchonslack

3、coalganguedisposalsystemequilibriumandwaysofreducingmediumconsumptioninAnjialingcoalpreparationplantWANGZheng—shu(ChinaCoalPingshuoCoalCo．，Ltd．，Shuozhou036006，China)Abstract：IntroducetechnologicalprocessanddesignfeaturesofslackcoalganguedisposalsysteminAn

4、jialingcoa]preparationplant．Inordertoresolvethefollowingproblems，unstability，highmediumconsumption，lowhandlingcapacity，widerangeofmixingmaterialvolumeanddensityinmixingbucket，largebypassflow，unconstantliquidlevelofmagneticseparator，transformthecoalprepara

5、tionplantfromsixaspectswhicharereformingfinecoalsievebendandNO．4，NO．5system，aswellasfeedstockdistributingboxofmagneticseparator，enhancingwatereliminatingsystem，replacingsieveplateofsievebendandplate—and—framefilterpress．Atlast，analyzethetransformationeffe

6、cts．Theresultsshowthat，themediumconsumptionisreducedfrom2．5kg／tto1．2kg／t，waterconsumptionisfrom0．12m／tto0．08m／t．calorificcapacityreachesupto21．77MJ／kg，thepriceofpertonofcoalincreasesby200yuan．Thesystemcouldworkcontinuouslyandmiddlingsqualityisstable．Theco

7、alpreparationplantsavescleanwater208thousandcubicmeterandmagneticironpowder6760tonseveryyear，thatmeans，saves4．394millionyuanwhichoriginallyshouldbepaidformagneticironpowder．Thetransformisquitdifferentfromthecommondesign．andprovidesabasisf0rmanufacturingan

8、dtechnicalmanagementaswellascoalpreparationplantdesign．Keywords：slackcoalganguedisposal；systemequilibrium；mediumconsumption；mixingbucket；slimewater；applicationeffeets平朔安家岭选煤厂是与安家岭露天煤矿配套原设计1、2、3系统工艺为150～13mm块煤重介的矿井型动