Tom qab luam tawm tsab ntawv xov xwm International Mining thaum lub Kaum Hli, thiab qhov tshwj xeeb tshaj yog qhov kev tsoo thiab kev thauj khoom hauv qhov av txhua xyoo, peb tau saib ze dua ib qho ntawm cov ntsiab lus tseem ceeb uas tsim cov kab ke no, lub tshuab pub mov apron.
Hauv kev khawb av,cov khoom noj apronua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev ua haujlwm zoo thiab ua kom lub sijhawm ua haujlwm ntev dua. Lawv daim ntawv thov hauv cov txheej txheem ua cov khoom siv hauv av muaj ntau yam sib txawv; txawm li cas los xij, lawv cov peev xwm tag nrho tsis tau paub zoo thoob plaws hauv kev lag luam, ua rau muaj ntau cov lus nug.
Martin Yester, Kev Txhawb Nqa Khoom Thoob Ntiaj Teb, Metso Bulk Products, teb qee cov lus nug tseem ceeb dua.
Hauv cov lus yooj yim, lub tshuab pub khoom noj apron (tseem hu ua lub lauj kaub pub khoom noj) yog hom tshuab pub khoom noj siv rau hauv kev ua haujlwm tuav cov khoom siv los hloov (pub) cov khoom siv rau lwm yam khoom siv lossis los ntawm cov khoom khaws cia, lub thawv lossis lub raj kom rho tawm cov khoom siv (ore / pob zeb) ntawm tus nqi tswj.
Cov khoom noj no siv tau rau ntau yam kev siv hauv kev ua haujlwm thawj zaug, theem ob thiab theem peb (rov qab).
Cov khoom noj khoom haus ntawm cov tsheb laij teb xa mus rau cov saw hlau hauv qab, cov log tsheb thiab cov log tsheb uas kuj siv rau ntawm cov tsheb laij teb thiab cov tsheb khawb av. Hom khoom noj khoom haus no tswj hwm kev lag luam uas cov neeg siv xav tau lub khoom noj khoom haus uas tuaj yeem rho tawm cov khoom siv nrog cov yam ntxwv sib txawv. Cov foob polyurethane hauv cov saw hlau tiv thaiv cov khoom siv abrasive los ntawm kev nkag mus rau hauv cov pins thiab bushings sab hauv, txo qhov hnav thiab ntev lub neej ntawm cov khoom siv piv rau cov saw hlau qhuav. Cov khoom noj khoom haus ntawm cov tsheb laij teb kuj txo cov suab nrov rau kev ua haujlwm ntsiag to. Cov txuas ntawm cov saw hlau raug kho cua sov rau lub neej ntev.
Zuag qhia tag nrho, cov txiaj ntsig suav nrog kev ntseeg siab ntxiv, tsawg dua cov khoom seem, tsawg dua kev saib xyuas thiab kev tswj hwm kev pub mis zoo dua. Ua rov qab, cov txiaj ntsig no ua rau muaj kev tsim khoom ntau ntxiv nrog qhov tsawg kawg nkaus ntawm kev cuam tshuam hauv txhua qhov kev ua cov ntxhia.
Ib qho kev ntseeg dav dav txogcov khoom noj apronyog tias lawv yuav tsum tau teeb tsa kab rov tav. Zoo, tsis zoo li kev ntseeg nrov, lawv tuaj yeem teeb tsa rau ntawm qhov ntxhab! Qhov no coj ntau yam txiaj ntsig thiab nta ntxiv. Thaum teeb tsa lub tshuab pub khoom noj apron ntawm qhov ntxhab, qhov chaw tsawg dua yog qhov xav tau tag nrho - tsis yog qhov ntxhab txwv qhov chaw hauv pem teb xwb, nws kuj txo qhov siab ntawm lub hopper txais. Cov tshuab pub khoom noj apron uas nqes hav muaj kev zam txim ntau dua thaum nws los txog rau cov khoom loj dua thiab, tag nrho, yuav ua rau lub ntim hauv lub hopper thiab txo lub sijhawm voj voog rau cov tsheb thauj khoom.
Nco ntsoov tias muaj qee yam uas yuav tsum paub thaum teeb tsa lub lauj kaub pub zaub mov rau ntawm qhov chaw nqes hav kom ua tiav cov txheej txheem. Lub hopper uas tsim tau zoo, lub kaum sab xis ntawm qhov nqes hav, kev tsim qauv ntawm cov qauv txhawb nqa, thiab lub kaw lus ntawm cov kev hla thiab cov ntaiv nyob ib puag ncig lub pub zaub mov yog cov yam tseem ceeb.
Ib qho kev nkag siab yuam kev txog kev siv cov khoom siv yog: "Sai dua qhov zoo dua." Hais txog cov khoom noj apron, qhov ntawd tsis yog qhov tseeb. Qhov ceev tshaj plaws los ntawm kev nrhiav qhov sib npaug ntawm kev ua haujlwm zoo thiab kev xa khoom sai. Lawv khiav qeeb dua li cov khoom noj siv txoj siv, tab sis muaj laj thawj zoo.
Feem ntau, qhov ceev zoo tshaj plaws ntawm lub tshuab pub mov apron yog 0.05-0.40 m / s. Yog tias cov hlau tsis yog abrasive, qhov ceev tuaj yeem nce mus rau siab dua 0.30 m / s vim muaj peev xwm txo qis hnav.
Kev khiav ceev dua yuav ua rau kev ua haujlwm tsis zoo: yog tias koj qhov kev khiav ceev dhau, koj yuav muaj kev pheej hmoo ntawm kev hnav cov khoom sai dua. Kev siv hluav taws xob zoo kuj txo qis vim muaj kev xav tau hluav taws xob ntau dua.
Lwm qhov teeb meem uas yuav tsum nco ntsoov thaum khiav lub tshuab pub mov apron ntawm qhov ceev ceev yog qhov muaj feem yuav muaj hmoov av ntau ntxiv. Tej zaum yuav muaj cov teebmeem sib txhuam ntawm cov khoom siv thiab lub phaj. Vim muaj peev xwm muaj hmoov av nyob hauv huab cua, kev tsim cov hmoov av ntau ntxiv tsis yog tsuas yog tsim teeb meem ntau ntxiv xwb, tab sis kuj tsim kom muaj ib puag ncig ua haujlwm txaus ntshai dua rau cov neeg ua haujlwm tag nrho. Yog li ntawd, kev nrhiav qhov ceev zoo tshaj plaws yog qhov tseem ceeb dua rau kev tsim khoom ntawm cov nroj tsuag thiab kev nyab xeeb hauv kev ua haujlwm.
Cov khoom noj uas siv rau hauv lub ris tsho hauv qab muaj cov kev txwv thaum nws los txog rau qhov loj thiab hom hlau. Cov kev txwv yuav txawv, tab sis cov khoom yuav tsum tsis txhob muab pov tseg rau ntawm lub khoom noj yam tsis muaj txiaj ntsig. Koj yuav tsum xav txog tsis yog qhov kev siv uas koj yuav siv lub khoom noj xwb, tab sis kuj tseem xav txog qhov chaw uas lub khoom noj ntawd yuav raug muab tso rau hauv cov txheej txheem.
Feem ntau, txoj cai ntawm kev lag luam rau qhov loj ntawm lub tais pub mov apron kom ua raws li yog tias qhov dav ntawm lub lauj kaub (lub tsho sab hauv) yuav tsum yog ob npaug ntawm qhov loj tshaj plaws ntawm daim ntaub loj tshaj plaws. Lwm yam tseem ceeb, xws li lub qhov qhib uas tsim tau zoo ua ke nrog kev siv "rock flip plate", yuav cuam tshuam rau qhov loj ntawm lub lauj kaub, tab sis qhov no tsuas yog cuam tshuam rau qee qhov xwm txheej xwb.
Nws tsis yog ib qho txawv txawv uas yuav muaj peev xwm rho tawm 1,500mm ntawm cov khoom yog tias siv lub tshuab pub dav 3,000mm. Cov khoom tsis zoo 300mm rho tawm ntawm cov pob zeb crusher lossis cov thawv cia / sib tov feem ntau yog rho tawm siv lub tshuab pub apron los pub rau lub tshuab crusher thib ob.
Thaum ntsuas qhov loj ntawm lub tshuab pub av thiab lub cev muaj zog (lub cev muaj zog), zoo li ntau yam khoom siv hauv kev lag luam tsuas, kev paub thiab kev paub txog tag nrho cov txheej txheem yog qhov tseem ceeb heev. Kev ntsuas qhov loj ntawm lub tshuab pub av yuav tsum muaj kev paub txog cov ntaub ntawv hauv Hoobkas kom ua tiav cov qauv uas tus neeg muag khoom xav tau "Daim Ntawv Thov Cov Ntaub Ntawv" (lossis tus neeg muag khoom tau txais lawv cov ntaub ntawv).
Cov qauv yooj yim uas yuav tsum tau xav txog suav nrog qhov nrawm ntawm kev pub (qhov siab tshaj plaws thiab ib txwm muaj), cov khoom siv (xws li dej noo, kev hloov pauv thiab cov duab), qhov loj tshaj plaws ntawm cov pob zeb / pob zeb, qhov ceev ntawm cov pob zeb / pob zeb (qhov siab tshaj plaws thiab tsawg kawg nkaus) thiab cov xwm txheej pub thiab Qhov Tawm.
Txawm li cas los xij, qee zaum yuav muaj ntau yam ntxiv rau hauv cov txheej txheem ntsuas qhov loj ntawm lub tshuab pub khoom noj uas yuav tsum tau suav nrog. Ib qho tseem ceeb ntxiv uas cov neeg muag khoom yuav tsum nug txog yog kev teeb tsa lub hopper. Tshwj xeeb, qhov qhib qhov ntev ntawm lub hopper (L2) nyob saum lub tshuab pub khoom noj. Yog tias siv tau, qhov no yog qhov tseem ceeb tsis yog rau kev ntsuas qhov loj ntawm lub tshuab pub khoom noj kom raug xwb, tab sis kuj rau lub kaw lus tsav tsheb.
Raws li tau hais los saum toj no, qhov ceev ntawm cov hlau/pob zeb yog ib qho ntawm cov qauv tseem ceeb thiab yuav tsum suav nrog qhov loj ntawm cov khoom siv khaws cia. Qhov ceev yog qhov hnyav ntawm cov khoom siv hauv ib qho ntim, feem ntau qhov ceev yog ntsuas hauv tons ib cubic meter (t/m³) lossis phaus ib cubic foot (lbs/ft³). Ib qho lus ceeb toom tshwj xeeb uas yuav tsum nco ntsoov yog tias qhov ceev yog siv rau cov khoom noj apron, tsis yog qhov ceev ntawm cov khoom khov zoo li hauv lwm cov khoom siv ua cov ntxhia.
Yog li ntawd, vim li cas qhov ceev ntawm cov khoom loj thiaj li tseem ceeb? Cov khoom noj khoom haus Apron yog cov khoom noj khoom haus volumetric, uas txhais tau tias qhov ceev ntawm cov khoom loj yog siv los txiav txim siab qhov ceev thiab lub zog uas xav tau los rho tawm qee qhov tonnage ntawm cov khoom ib teev. Qhov ceev tsawg kawg nkaus yog siv los txiav txim siab qhov ceev, thiab qhov ceev ntau tshaj plaws txiav txim siab lub zog (torque) uas cov khoom noj khoom haus xav tau.
Tag nrho hauv txhua yam, nws yog ib qho tseem ceeb uas yuav tsum siv qhov ceev "bulk" kom raug es tsis txhob siv qhov ceev "khoom" los ntsuas qhov loj ntawm koj lub tshuab pub mis. Yog tias cov kev xam no tsis raug, qhov ceev pub zaum kawg ntawm cov txheej txheem tom qab yuav raug cuam tshuam.
Kev txiav txim siab qhov ntev ntawm lub hopper shear yog ib qho tseem ceeb hauv kev txiav txim siab thiab xaiv lub apron feeder thiab drive system (engine). Tab sis qhov no puas paub tseeb li cas? Hopper shear length yog qhov ntev ntawm lub skirted hopper back plate mus rau lub shear bar ntawm qhov kawg ntawm lub hopper. Nws suab yooj yim, tab sis nws yog qhov tseem ceeb uas yuav tsum nco ntsoov tias qhov no yuav tsum tsis txhob tsis meej pem nrog qhov loj ntawm sab saum toj ntawm lub hopper uas tuav cov khoom.
Lub hom phiaj ntawm kev nrhiav qhov kev ntsuas qhov ntev ntawm lub hopper no yog los txiav txim siab qhov tseeb ntawm txoj kab shear plane ntawm cov khoom siv thiab qhov twg cov khoom siv hauv daim tiab sib cais (shears) ntawm cov khoom siv (L2) hauv lub hopper. Qhov kev tiv thaiv shear ntawm cov khoom siv feem ntau kwv yees li ntawm 50-70% ntawm tag nrho lub zog / lub zog. Qhov kev xam qhov ntev shear no yuav ua rau muaj zog tsawg (poob ntawm kev tsim khoom) lossis muaj zog ntau dhau (nce hauv cov nuj nqis ua haujlwm (opex)).
Qhov chaw ntawm cov khoom siv yog qhov tseem ceeb rau txhua lub cog. Raws li tau hais ua ntej, lub tshuab pub mov apron tuaj yeem ntsia tau rau ntawm cov toj roob hauv pes kom txuag tau qhov chaw. Kev xaiv qhov ntev ntawm lub tshuab pub mov apron tsis yog tsuas yog txo cov peev txheej (capex), tab sis kuj txo cov kev siv hluav taws xob thiab cov nqi khiav lag luam.
Tiam sis yuav txiav txim siab qhov ntev zoo tshaj plaws li cas? Qhov ntev zoo tshaj plaws ntawm lub tshuab pub khoom noj yog qhov uas tuaj yeem ua tiav txoj haujlwm xav tau hauv qhov luv tshaj plaws. Txawm li cas los xij, qee zaum, rau kev ua haujlwm, kev xaiv lub tshuab pub khoom noj yuav siv sijhawm ntev dua los "hloov" cov khoom mus rau cov khoom siv hauv qab thiab tshem tawm cov ntsiab lus hloov (thiab cov nqi tsis tsim nyog).
Yuav kom txiav txim tau qhov pub mis luv tshaj plaws thiab zoo tshaj plaws, lub pub mis apron yuav tsum tau muab tso rau hauv qab lub hopper (L2). Tom qab txiav txim siab qhov ntev ntawm shear thiab qhov tob ntawm lub txaj, qhov ntev tag nrho tuaj yeem raug txo kom tsis txhob muaj qhov hu ua "self-flushing" ntawm qhov kawg ntawm qhov tso tawm thaum lub pub mis tsis ua haujlwm.
Kev xaiv lub tshuab tsav tsheb kom raug rau koj lub tshuab pub khoom noj apron yuav nyob ntawm kev ua haujlwm thiab lub hom phiaj ntawm lub tshuab pub khoom noj. Cov tshuab pub khoom noj apron yog tsim los ua haujlwm ntawm qhov ceev sib txawv kom rho tawm ntawm qhov chaw cia khoom thiab pub rau hauv qab ntawm qhov ceev tswj kom ua haujlwm tau zoo tshaj plaws. Cov ntaub ntawv yuav txawv vim yog lub caij nyoog ntawm lub xyoo, lub cev hlau lossis kev tua thiab cov qauv sib tov.
Ob hom kev tsav uas haum rau qhov ceev hloov pauv yog kev tsav tsheb siv cov iav txo qis, cov cav hloov pauv zaus thiab cov tsav hloov pauv zaus (VFDs), lossis cov cav hydraulic thiab cov chaw fais fab nrog cov twj hloov pauv. Niaj hnub no, cov tsav tsheb hloov pauv ceev tau ua pov thawj tias yog lub kaw lus tsav tsheb uas xaiv vim muaj kev nce qib ntawm thev naus laus zis thiab cov txiaj ntsig ntawm kev siv peev.
Cov tshuab tsav hydraulic muaj lawv qhov chaw, tab sis tsis suav tias yog qhov zoo tagnrho ntawm ob lub tshuab hloov pauv.
Lub sijhawm tshaj tawm: Lub Xya Hli-14-2022
