排山樓金礦炭漿廠磨礦與分級系統(tǒng)技術(shù)改造研究.pdf

1、東北大學(xué)碩士學(xué)位論文排山樓金礦炭漿廠磨礦與分級系統(tǒng)技術(shù)改造研究姓名：張清波申請學(xué)位級別：碩士專業(yè)：礦業(yè)工程指導(dǎo)教師：魏德洲2002.8.1塞韭盔堂璧主堂焦絲塞一———————————————塵塑竺!!一ReconstructionresearchonthegrindingandclassificationcircuitintheCIPplantofPaishaniouGoldMineAbstractPanshanlouGoldMines

2、tartedproduction融Octoberof1997whichhasacyni盔tion。CIPplantfor0糖processingwithdesigncapacity1200VdFortheplantproducespoorsulfurcontainedalteredmylonitetypeorewithgrindabfl岫index07，whichishardertobecrushed，theorigindesigned

3、crushingcircuitcallnotsarisfytheproduction，anditneedst。befebuiIt。弛etechnicalreconsRuctionwasdonethrough越troducingNordberg’ssuperfinegrindingte虻lmologywhichincreasedthecrushingcapabiliHupt02000t／dandfinalcrushedsizedownto

4、lOmmDuetothecrushingcircuitreconslrucfion，thegrindingctrcmtalsoneedstohgveCOITespondentchangeThechangeschemekeepstheoriginfirststagem324。5mgrateballmilland由24mdoublespiral—hi西overflowweirgraderandreplacesthesecondstage每2

5、736moverflowballmillby毒3。26Omoverflowhallmill，thusthegrindingcircuitofsmallerraillinthefirststageandbiggerraillinthesecondstageisformedWiththissygtcmtheonlythingneedtocareaboutduringproductionistheioadallorationbetwefftl

6、thetwomillsHoweverthe辮jndmgcapacityapprovedwi氆thesystemonlyarrivesat173則dthtoughrepeatedpracticewhichhasnotY髓reachedtheproductionrequirementConsequentlyreconslTuctionresearchonthegrindinganddassificationcircuitwerecarrie

7、douttoincreasethegrindingcapacityintheplantThereseatchconcludedthat：throughthehei#ltadjustmentofoverflowweironthespiralclassifierandcontrolofoverflowconcenffationtorealizeefficientload／nga110cationtothetwomills；rebuildin

8、gthesecondstage鰳K：lertoincreasethechurgmgrateietosolvethelowerproportionofgrindingsize0074ramyieldingi11也esecondgrindingmill，byremovingthedramshapefeederandtakingdirectfeedingarisingloadinghei曲tandreducingoutleteliametef

9、ofthesmallermill，throughwhichtheactualcharg／ngratewaseventuallyincreasedfrom32％upto42‰and‰valuefrom057l，mihupto079t，鄙矗：redesigningthe奄500ramcyclonewithdifferentinteraalstrucalre。reducingtheinletsizefromnO120ramdowntogO12

10、0ramreducingthecalculateddiameterfiom由130mmdownto由110mm，increasingtheinsertingdepthoftheoverflowpipefrom307ramupto500ram，anddepthfactorfrom038坤toO63whichcomparativelyincreasetheworkingpressureandclassifydetainingtime，soa

11、stoincreasetheclassifyingefficiencyandworkingcapacityofthecyclonemughabovetechnicalreconstructiontheworkingcapacitiesofthegrindinganddassificationcircuitinPanshanlouwereincreasedfrom1750t／d蹄姆1985t／d，theproportionofclassi

12、fyLugsize0074ramfrom78O％upto8173％、撕ththenewsysteIIktheworkingcapacityoftheplantcanbeincreasedbv80，∞0teveryyearandadd5500ozmoregoldequivalenttooutputvalueRMBl0millionforthemine。FortheobviOIlSbenefits塒協(xié)thereconsmwtionithas