選礦概論磨礦分級(jí)課件

選礦概論MineralprocessingEvaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL選礦概論1磨礦與分級(jí)≯磨礦作業(yè)是礦石破碎作業(yè)的繼續(xù),是選別前準(zhǔn)備作業(yè)的重要組成部分。分級(jí)作業(yè)與磨礦作業(yè)聯(lián)合,及時(shí)分出粒度合格的產(chǎn)物,減少過(guò)磨,提高磨機(jī)的生產(chǎn)能力和磨礦效率。5)23PH球磨機(jī)水力旋流器Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級(jí)2磨礦與分級(jí)磨礦可分為有介質(zhì)磨礦無(wú)介質(zhì)磨礦(自磨)干式磨礦濕式磨礦磨礦產(chǎn)品經(jīng)分級(jí)后,不合格部分返回原磨機(jī)的,稱閉路磨礦;不返回原磨機(jī)或由另一臺(tái)磨機(jī)處理的,稱開路磨礦。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級(jí)3磨礦與分級(jí)分級(jí),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(jí)的過(guò)程。水力分級(jí)風(fēng)力分級(jí)分級(jí)產(chǎn)物粒度,反映分級(jí)產(chǎn)物的粗細(xì)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(jí)的質(zhì)量分?jǐn)?shù)表示,如-0.074m顆粒占80%。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級(jí)4磨礦與分級(jí)篩分與分級(jí)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(jí)產(chǎn)物中粒度大小23mm以寸分級(jí)比較均勻,平均直徑相同上物料按沉降速度分/同級(jí)產(chǎn)物主要是等降顆粒,粒度不均勻分級(jí)|級(jí),粒度23mm以度與形狀影響大密度礦粒平均直徑分級(jí)小,小密度礦粒平均/下物料直徑大。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級(jí)5磨礦與分級(jí)與磨礦機(jī)械相連的分級(jí)設(shè)備的用途1預(yù)先分級(jí),把磨機(jī)給料中不需磨細(xì)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(jí),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(jí),把上一級(jí)分級(jí)設(shè)備的溢流再分級(jí),從而得到更細(xì)的溢流。Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL磨礦與分級(jí)6四、磨礦與分級(jí)1球磨機(jī)2高壓輥磨機(jī)3螺旋分級(jí)機(jī)4水力旋流器5磨礦分級(jí)流程Evaluauononr.chAsposeslidesforNET4odientPEvaluationonly.CreatedwithAsposeSlidesforNET4.0dientProfilo71Copyright2004-2017AsposePtyL四、磨礦與分級(jí)71球磨機(jī)以鋼球?yàn)槟サV介質(zhì)規(guī)格以筒體內(nèi)徑D與長(zhǎng)度來(lái)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(zhǎng)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(jī)81球磨機(jī)>球磨機(jī)內(nèi)礦石粉碎過(guò)程筒體旋轉(zhuǎn)時(shí),球磨機(jī)內(nèi)的鋼球隨筒體一起旋轉(zhuǎn),并到達(dá)一定高度;當(dāng)鋼球重力的向心分力大離心力∴時(shí),脫離筒體下落,擊碎礦石;冀磨機(jī)運(yùn)轉(zhuǎn)過(guò)程中,磨礦介質(zhì)發(fā)生滑動(dòng),對(duì)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(jī)91球磨機(jī)磨礦介質(zhì)在筒體內(nèi)的運(yùn)動(dòng)狀態(tài)1瀉落式:筒體低速運(yùn)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(yùn)動(dòng)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(jī)10選礦概論磨礦分級(jí)課件11選礦概論磨礦分級(jí)課件12選礦概論磨礦分級(jí)課件13選礦概論磨礦分級(jí)課件14選礦概論磨礦分級(jí)課件15選礦概論磨礦分級(jí)課件16選礦概論磨礦分級(jí)課件17選礦概論磨礦分級(jí)課件18選礦概論磨礦分級(jí)課件19選礦概論磨礦分級(jí)課件20選礦概論磨礦分級(jí)課件21選礦概論磨礦分級(jí)課件22選礦概論磨礦分級(jí)課件23選礦概論磨礦分級(jí)課件24選礦概論磨礦分級(jí)課件25選礦概論磨礦分級(jí)課件26選礦概論磨礦分級(jí)課件27選礦概論磨礦分級(jí)課件28選礦概論磨礦分級(jí)課件29選礦概論磨礦分級(jí)課件30選礦概論磨礦分級(jí)課件31選礦概論磨礦分級(jí)課件32選礦概論磨礦分級(jí)課件33選礦概論磨礦分級(jí)課件34選礦概論磨礦分級(jí)課件35選礦概論磨礦分級(jí)課件36選礦概論磨礦分級(jí)課件37選礦概論磨礦分級(jí)課件38選礦概論磨礦分級(jí)課件39選礦概論磨礦分級(jí)課件40選礦概論磨礦分級(jí)課件41選礦概論磨礦分級(jí)課件42選礦概論磨礦分級(jí)課件43選礦概論磨礦分級(jí)課件44選礦概論磨礦分級(jí)課件45選礦概論磨礦分級(jí)課件46選礦概論磨礦分級(jí)課件47選礦概論磨礦分級(jí)課件48選礦概論磨礦分級(jí)課件49選礦概論磨礦分級(jí)課件50選礦概論磨礦分級(jí)課件51選礦概論磨礦分級(jí)課件52選礦概論磨礦分級(jí)課件53選礦概論磨礦分級(jí)課件54選礦概論磨礦分級(jí)課件55選礦概論磨礦分級(jí)課件56選礦概論磨礦分級(jí)課件57選礦概論磨礦分級(jí)課件58選礦概論磨礦分級(jí)課件59選礦概論磨礦分級(jí)課件60選礦概論磨礦分級(jí)課件61選礦概論磨