選礦概論磨礦分級課件

選礦概論MineralprocessingEvaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL選礦概論1磨礦與分級≯磨礦作業(yè)是礦石破碎作業(yè)的繼續(xù),是選別前準備作業(yè)的重要組成部分。分級作業(yè)與磨礦作業(yè)聯(lián)合,及時分出粒度合格的產(chǎn)物,減少過磨,提高磨機的生產(chǎn)能力和磨礦效率。5)23PH球磨機水力旋流器Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級2磨礦與分級磨礦可分為有介質(zhì)磨礦無介質(zhì)磨礦(自磨)干式磨礦濕式磨礦磨礦產(chǎn)品經(jīng)分級后,不合格部分返回原磨機的,稱閉路磨礦;不返回原磨機或由另一臺磨機處理的,稱開路磨礦。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級3磨礦與分級分級,根據(jù)顆粒在流體介質(zhì)(水或空氣)中沉降速度的差異,將物料分成不同粒級的過程。水力分級風(fēng)力分級分級產(chǎn)物粒度,反映分級產(chǎn)物的粗細程度。1以產(chǎn)物的粒度范圍表示,如0.1~0.2m或-0.2mm+10.1mm2以某一特定粒級的質(zhì)量分數(shù)表示,如-0.074m顆粒占80%。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級4磨礦與分級篩分與分級的比較類別工作原理產(chǎn)品特征應(yīng)用范圍篩分九幾你尺同級產(chǎn)物中粒度大小23mm以寸分級比較均勻,平均直徑相同上物料按沉降速度分/同級產(chǎn)物主要是等降顆粒,粒度不均勻分級|級,粒度23mm以度與形狀影響大密度礦粒平均直徑分級小,小密度礦粒平均/下物料直徑大。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級5磨礦與分級與磨礦機械相連的分級設(shè)備的用途1預(yù)先分級,把磨機給料中不需磨細的合格物料預(yù)先分出,只將不合格的粗粒送去磨礦;2檢查分級,將磨礦排料中粒度合格的物料分出,不合格的粗粒返回再處理。3溢流控制分級,把上一級分級設(shè)備的溢流再分級,從而得到更細的溢流。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級6四、磨礦與分級1球磨機2高壓輥磨機3螺旋分級機4水力旋流器5磨礦分級流程Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL四、磨礦與分級71球磨機以鋼球為磨礦介質(zhì)規(guī)格以筒體內(nèi)徑D與長度來表示792m×116m根據(jù)排料方式,分為格子型、溢流型>根據(jù)筒體形狀,分為短筒型L≤D、長筒型L=(1.530)D、錐形L=(0.25-10)D和管形L=(3-6)DEvaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL1球磨機81球磨機>球磨機內(nèi)礦石粉碎過程筒體旋轉(zhuǎn)時,球磨機內(nèi)的鋼球隨筒體一起旋轉(zhuǎn),并到達一定高度;當鋼球重力的向心分力大離心力∴時,脫離筒體下落,擊碎礦石;冀磨機運轉(zhuǎn)過程中,磨礦介質(zhì)發(fā)生滑動,對礦石產(chǎn)生研磨作用。沖擊力+研磨力→粉碎礦石Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL1球磨機91球磨機磨礦介質(zhì)在筒體內(nèi)的運動狀態(tài)1瀉落式:筒體低速運轉(zhuǎn),球荷頂部鋼球沿球荷表面“滾下2拋落式:向體轉(zhuǎn)速增大到二定度,鋼球筒體作運動3離心式:筒體速增大到某一極值:鋼球隨體作同心Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL1球磨機10選礦概論磨礦分級課件11選礦概論磨礦分級課件12選礦概論磨礦分級課件13選礦概論磨礦分級課件14選礦概論磨礦分級課件15選礦概論磨礦分級課件16選礦概論磨礦分級課件17選礦概論磨礦分級課件18選礦概論磨礦分級課件19選礦概論磨礦分級課件20選礦概論磨礦分級課件21選礦概論磨礦分級課件22選礦概論磨礦分級課件23選礦概論磨礦分級課件24選礦概論磨礦分級課件25選礦概論磨礦分級課件26選礦概論磨礦分級課件27選礦概論磨礦分級課件28選礦概論磨礦分級課件29選礦概論磨礦分級課件30選礦概論磨礦分級課件31選礦概論磨礦分級課件32選礦概論磨礦分級課件33選礦概論磨礦分級課件34選礦概論磨礦分級課件35選礦概論磨礦分級課件36選礦概論磨礦分級課件37選礦概論磨礦分級課件38選礦概論磨礦分級課件39選礦概論磨礦分級課件40選礦概論磨礦分級課件41選礦概論磨礦分級課件42選礦概論磨礦分級課件43選礦概論磨礦分級課件44選礦概論磨礦分級課件45選礦概論磨礦分級課件46選礦概論磨礦分級課件47選礦概論磨礦分級課件48選礦概論磨礦分級課件49選礦概論磨礦分級課件50選礦概論磨礦分級課件51選礦概論磨礦分級課件52選礦概論磨礦分級課件53選礦概論磨礦分級課件54選礦概論磨礦分級課件55選礦概論磨礦分級課件56選礦概論磨礦分級課件57選礦概論磨礦分級課件58選礦概論磨礦分級課件59選礦概論磨礦分級課件60選礦概論磨礦分級課件61選礦概論磨