Hydrocyclones

Kev piav qhia

Hydrocyclonesyog cono-cylindrical nyob rau hauv cov duab, nrog ib tug tangential feed inlet mus rau hauv lub cylindrical seem thiab ib tug qhov hluav taws xob ntawm txhua axis. Lub qhov hluav taws xob ntawm lub cylindrical seem yog hu ua vortex finder thiab txuas mus rau hauv lub cua daj cua dub kom txo qis-circuit ntws ncaj qha los ntawm qhov nkag. Ntawm qhov kawg conical yog lub qhov hluav taws xob thib ob, lub spigot. Rau qhov sib cais me me, ob lub qhov hluav taws xob feem ntau qhib rau qhov chaw. Hydrocyclones feem ntau ua haujlwm vertically nrog tus spigot nyob rau hauv qis kawg, li no cov khoom ntxhib yog hu ua underflow thiab cov khoom zoo, tawm hauv vortex finder, cov dej ntws. Daim duab 1 schematically qhia cov thawj coj khiav thiab tsim cov yam ntxwv ntawm ib tug raughydrocyclone: ob lub vortices, tangential feed inlet thiab axial outlets. Tsuas yog rau thaj tsam tam sim ntawd ntawm tangential inlet, cov kua dej nyob rau hauv lub cyclone muaj radial symmetry. Yog hais tias ib qho los yog ob qho tib si ntawm cov qhov hluav taws xob qhib rau qhov chaw, qhov chaw tsis tshua muaj siab ua rau muaj cov roj core raws li txoj kab ntsug, sab hauv lub vortex.

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Daim duab 1. Cov yam ntxwv tseem ceeb ntawm hydrocyclone.

Lub hauv paus ntsiab lus ntawm kev khiav hauj lwm yog yooj yim: cov kua, nqa cov khoom tshem tawm, nkag mus rau hauv cyclone tangentially, spirals downwards thiab ua ib tug centrifugal teb nyob rau hauv dawb vortex flow. Cov khoom loj dua txav los ntawm cov kua dej mus rau sab nraud ntawm cov cua daj cua dub nyob rau hauv ib lub voj voog ncig, thiab tawm mus los ntawm cov spigot nrog ib feem ntawm cov kua. Vim yog qhov txwv ntawm thaj tsam ntawm tus spigot, ib qho vortex sab hauv, tig mus rau tib txoj kev raws li cov vortex sab nrauv tab sis ntws mus rau sab saud, yog tsim thiab tawm ntawm cov cua daj cua dub los ntawm cov vortex finder, nqa cov kua thiab cov khoom zoo tshaj plaws nrog nws. Yog tias lub peev xwm spigot ntau dhau lawm, cov tub ntxhais huab cua raug kaw thiab qhov tso pa tawm ntawm lub kaus mom hloov mus rau 'txoj hlua' thiab poob ntawm cov khoom ntxhib mus rau qhov dej ntws.

Txoj kab uas hla ntawm lub cylindrical seem yog qhov sib txawv loj uas cuam tshuam qhov loj ntawm cov khoom sib cais, txawm hais tias lub qhov hluav taws xob qhov hluav taws xob tuaj yeem hloov pauv ntawm nws tus kheej los hloov qhov sib cais ua tiav. Thaum cov neeg ua haujlwm thaum ntxov tau sim cyclones me me li 5 hli txoj kab uas hla, kev lag luam hydrocyclone diameters tam sim no muaj li ntawm 10 hli mus rau 2.5 m, nrog sib cais qhov loj me rau qhov ntom ntom ntawm 2700 kg m-3 ntawm 1.5-300 μm, txo qis nrog cov particle ntom. Kev khiav hauj lwm siab poob yog li ntawm 10 bar rau me me diameters mus rau 0.5 bar rau loj units. Txhawm rau kom muaj peev xwm, ntau yam me mehydrocyclonestej zaum yuav manifolded los ntawm ib kab noj.

Txawm hais tias lub hauv paus ntsiab lus ntawm kev ua haujlwm yog qhov yooj yim, ntau yam ntawm lawv txoj haujlwm tseem tsis tau nkag siab, thiab kev xaiv hydrocyclone thiab kev kwv yees rau kev lag luam kev lag luam yog qhov muaj txiaj ntsig zoo.

Kev faib tawm

Barry A. Wills, James A. Finch FRSC, FCIM, P.Eng., hauv Wills' Mineral Processing Technology (Eighth Edition), 2016

9.4.3 Hydrocyclones Versus Cov ntxaij vab tshaus

Hydrocyclones tau los ua tus tswj kev faib tawm thaum cuam tshuam nrog qhov loj me me hauv kev sib tsoo kaw (<200 µm). Txawm li cas los xij, kev txhim kho tsis ntev los no hauv kev tshuaj ntsuam thev naus laus zis (Tshooj 8) tau rov ua dua tshiab ntawm kev siv cov ntxaij vab tshaus hauv kev sib tsoo. Cov ntxaij vab tshaus sib cais raws li qhov loj me thiab tsis cuam tshuam ncaj qha los ntawm qhov ntom ntom ntawm cov khoom noj khoom haus. Qhov no tuaj yeem ua tau zoo dua. Cov ntxaij vab tshaus kuj tsis muaj ib qho bypass feem, thiab raws li Piv txwv 9.2 tau qhia, bypass tuaj yeem loj heev (tshaj 30% hauv qhov ntawd). Daim duab 9.8 qhia ib qho piv txwv ntawm qhov sib txawv ntawm kev faib nkhaus rau cyclonesand cov ntxaij vab tshaus. Cov ntaub ntawv yog los ntawm El Brocal concentrator hauv Peru nrog kev ntsuas ua ntej thiab tom qab cov hydrocyclones tau hloov nrog Derrick Stack Sizer® (saib Tshooj 8) hauv kev sib tsoo (Dündar li al., 2014). Raws li qhov kev cia siab, piv rau cov cua daj cua dub lub vijtsam muaj qhov sib cais me me (txoj kab nqes ntawm nkhaus yog siab dua) thiab me ntsis bypass. Kev nce hauv kev sib tsoo lub peev xwm tau tshaj tawm vim tias muaj kev tawg ntau dua tom qab siv qhov screen. Qhov no tau raug ntaus nqi los ntawm kev tshem tawm ntawm cov bypass, txo cov nqi ntawm cov khoom zoo xa rov qab mus rau kev sib tsoo mills uas nyhav rau cushion particle-particle cuam tshuam.

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Daim duab 9.8. Muab faib nkhaus rau cyclones thiab cov ntxaij vab tshaus hauv kev sib tsoo Circuit Court ntawm El Brocal concentrator.

(Hloov los ntawm Dündar et al. (2014))

Kev hloov pauv tsis yog ib txoj hauv kev, txawm li cas los xij: ib qho piv txwv tsis ntev los no yog kev hloov pauv ntawm lub vijtsam mus rau cua daj cua dub, kom tau txais txiaj ntsig ntawm qhov txo qis ntxiv ntawm cov nyiaj denser (Sasseville, 2015).

Metallurgical txheej txheem thiab tsim

Eoin H. Macdonald, hauv Phau Ntawv Qhia Txog Kev Tshawb Fawb Kub thiab Kev Ntsuas, 2007

Hydrocyclones

Hydrocyclones yog cov chav nyiam tshaj plaws rau sizing lossis desliming loj slurry ntim pheej yig thiab vim tias lawv nyob hauv pem teb tsawg heev los yog chav tsev. Lawv ua haujlwm tau zoo heev thaum noj tus nqi ntws txawm tias thiab siv rau cov pawg ntawm ib tus zuj zus lossis hauv cov pawg kom tau txais kev cuam tshuam tag nrho ntawm kev yuav tsum tau faib. Sizing muaj peev xwm cia siab rau centrifugal rog tsim los ntawm siab tangential ntws tshaj tawm los ntawm chav tsev. Thawj vortex tsim los ntawm cov khoom slurry tuaj yeem ua spirally downwards nyob ib ncig ntawm lub khob sab hauv phab ntsa. Cov khoom yog tawm sab nraud los ntawm lub zog centrifugal kom raws li lub pulp txav mus rau nws qhov ntom ntom. Vertical Cheebtsam ntawm kev tshaj tawm ua downwards ze ntawm lub cone phab ntsa thiab upwards ze ntawm lub axis. Qhov tsawg centrifugally sib cais slime feem yog yuam upwards los ntawm lub vortex finder kom dhau los ntawm qhov qhib ntawm lub Upper kawg ntawm lub khob hliav qab. Ib qho chaw nruab nrab lossis lub hnab ntawv ntawm ob qhov ntws muaj xoom ntsug tshaj tawm thiab cais cov coarser khib nyiab txav mus rau hauv qab ntawm cov khib nyiab zoo dua mus rau saum. Feem ntau ntawm cov dej ntws dhau mus rau hauv qhov me me sab hauv vortex thiab siab dua centrifugal rog pov qhov loj ntawm cov khoom zoo tshaj tawm sab nraud yog li muab kev sib cais zoo dua hauv cov sizings zoo dua. Cov khoom no rov qab mus rau sab nrauv vortex thiab tshaj tawm ib zaug ntxiv rau jig pub.

Lub geometry thiab kev khiav hauj lwm tej yam kev mob nyob rau hauv lub spiral flow qauv ntawm ib tug raughydrocyclonetau piav qhia hauv daim duab 8.13. Cov hloov pauv kev ua haujlwm yog PARP qhov ceev, pub nrog cov yam ntxwv, pub inlet siab thiab lub siab poob los ntawm kev kub hau. Cyclone variables yog thaj tsam ntawm pub inlet, vortex finder txoj kab uas hla thiab ntev, thiab spigot tawm txoj kab uas hla. Tus nqi ntawm tus cab coefficient kuj cuam tshuam los ntawm cov duab; qhov ntau qhov sib txawv ntawm qhov sib txawv ntawm qhov me me yog nws qhov zoo thiab qhov ntau dua nws qhov kev daws teeb meem. Lub cheeb tsam kev ntxhov siab tseem ceeb tuaj yeem txuas mus rau qee qhov kub ntawm qhov loj li 200 hli hauv qhov loj thiab ua tib zoo saib xyuas cov txheej txheem kev faib tawm yog li qhov tseem ceeb kom txo tau cov khoom siv rov ua dua qub thiab ua rau cov slimes tsim. Keeb kwm, thaum me ntsis kev saib xyuas rau qhov rov qab los ntawm 150μm kub nplej, nqa-tshaj kub hauv cov slime feem zoo li tau ua lub luag haujlwm loj rau kev poob kub uas tau sau tseg kom siab li 40-60% hauv ntau qhov chaw kub kub.

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8.13. Ib txwm geometry thiab kev ua haujlwm ntawm hydrocyclone.

Daim duab 8.14 (Warman Selection Chart) yog ib qho kev xaiv ua ntej ntawm cyclones rau kev sib cais ntawm ntau yam D50 sizings ntawm 9-18 microns mus txog 33-76 microns. Daim ntawv qhia no, ib yam li lwm cov kab kos ntawm kev ua haujlwm cyclone, yog ua raws li kev tswj xyuas kom zoo ntawm ib hom tshwj xeeb. Nws xav tias cov ntsiab lus ntawm cov khib nyiab ntawm 2,700 kg / m3 hauv dej ua thawj cov lus qhia rau kev xaiv. Txoj kab uas hla loj dua yog siv los tsim cov sib cais sib cais tab sis yuav tsum muaj cov khoom noj siab rau kev ua haujlwm zoo. Kev sib cais zoo ntawm cov khoom noj siab yuav tsum muaj pawg me me ntawm txoj kab uas hla cyclones ua haujlwm sib luag. Cov qauv tsim zaum kawg rau qhov loj me yuav tsum tau txiav txim siab sim, thiab nws yog ib qho tseem ceeb uas yuav tau xaiv lub cua daj cua dub nyob ib ncig ntawm qhov nruab nrab ntawm qhov ntau kom muaj kev hloov me me uas yuav tsum tau ua thaum pib ua haujlwm.

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8.14 ib. Warman preliminary xaiv daim duab.

CBC (cig txaj) cyclone tau thov kom faib cov khoom noj khoom noj kub txog li 5 hli txoj kab uas hla thiab tau txais cov khoom noj khoom haus zoo sib xws los ntawm cov dej hauv qab. Kev sib cais yuav tshwm sim ntawm kwv yees liD50/150 microns raws li silica ntawm qhov ceev 2.65. Lub CBC cyclone underflow tau thov kom muaj peev xwm tshwj xeeb rau kev sib cais ntawm jig vim tias nws qhov sib npaug ntawm qhov loj me thiab yuav luag tag nrho tshem tawm cov khoom pov tseg zoo. Txawm li cas los xij, txawm hais tias cov txheej txheem no tau lees paub los tsim cov qib siab tseem ceeb ntawm cov ntxhia hnyav sib npaug hauv ib qho dhau los ntawm qhov ntev ntawm cov khoom noj (xws li cov xuab zeb ntxhia), tsis muaj cov txiaj ntsig zoo li no muaj rau cov khoom noj khoom noj uas muaj cov kub zoo thiab flaky. . Table 8.5 muab cov ntaub ntawv technical rau AKWhydrocyclonesrau cov ntsiab lus txiav tawm ntawm 30 thiab 100 microns.

Tab 8.5. Technical data rau AKW hydrocyclones

Hom (KRS) Txoj kab uas hla (mm) Siab poob Muaj peev xwm Txiav point (microns)
Slurry (m3 / teev) Cov khoom (t / h max).
2118 100 1–2.5 9.27 ib 5 30–50
2515 ib 125 1–2.5 11–30 : kuv 6 25–45 : kuv
ib 4118 200 0.7-2.0 Nws 18–60 : kuv 15 40–60 : kuv
(RWN)6118 300 0.5-1.5 hli 40–140 : kuv 40 50–100

Kev loj hlob ntawm hlau ore comminution thiab classification technologies

A. Jankovic, hauv Iron Ore, 2015

8.3.3.1 Hydrocyclone separators

Lub hydrocyclone, tseem hu ua cyclone, yog ib qho kev faib khoom siv uas siv lub zog centrifugal los ua kom nrawm nrawm ntawm slurryparticles thiab cais cov khoom raws li qhov loj me, cov duab, thiab lub ntiajteb txawj nqus. Nws yog dav siv nyob rau hauv kev lag luam minerals, nrog rau nws lub ntsiab siv nyob rau hauv mineral ua raws li ib tug classifier, uas tau ua pov thawj tsis tshua muaj txiaj ntsig ntawm qhov sib cais zoo. Nws yog siv dav hauv kev sib tsoo lub voj voog tab sis tau pom ntau lwm yam kev siv, xws li desliming, degritting, thiab thickening.

Ib tug raug hydrocyclone (Daim duab 8.12a) muaj ib tug conical zoo li lub nkoj, qhib ntawm nws apex, los yog underflow, koom rau ib tug cylindrical seem, uas muaj ib tug tangential feed inlet. Sab saum toj ntawm lub cylindrical seem yog kaw nrog ib lub phaj los ntawm kev hla lub axially mounted overflow yeeb nkab. Cov yeeb nkab txuas mus rau hauv lub cev ntawm cov cua daj cua dub los ntawm ib qho luv luv, tshem tau seem hu ua vortex finder, uas tiv thaiv luv luv-circuiting ntawm pub ncaj qha rau hauv cov dej ntws. Cov khoom noj yog qhia nyob rau hauv siab los ntawm lub tangential nkag, uas imparts ib tug swirling tsab ntawv tsa suab mus rau lub pulp. Qhov no ua rau lub vortex nyob rau hauv lub cua daj cua dub, nrog rau thaj tsam uas tsis tshua muaj siab nyob rau ntawm txoj kab ntsug, raws li pom hauv daim duab 8.12b. Cov huab cua-core tsim nyob rau hauv lub axis, feem ntau txuas nrog cov huab cua los ntawm lub apex qhib, tab sis nyob rau hauv ib feem tsim los ntawm yaj huab cua tawm los ntawm kev daws nyob rau hauv lub cheeb tsam ntawm tsawg siab. Lub zog centrifugal accelerates tus nqi ntawm cov khoom, yog li cais cov khoom raws li qhov loj me, cov duab, thiab lub ntiajteb txawj nqus. Cov teeb meem sai dua txav mus rau phab ntsa ntawm cov cua daj cua dub, qhov chaw tshaj tawm qis tshaj plaws, thiab tsiv mus rau lub apex qhib (underflow). Vim yog qhov kev txiav txim ntawm lub zog rub, cov khoom qeeb qeeb txav mus rau thaj tsam ntawm qhov tsis tshua muaj siab raws li axis thiab nqa mus rau sab saud los ntawm vortex finder mus rau qhov dej ntws.

Daim duab 8.12. Hydrocyclone (https://www.aeroprobe.com/applications/examples/australian-mining-industry-uses-aeroprobe-equipment-to-study-hydro-cyclone) thiab hydrocyclone roj teeb. Cavex hydrocyclone overvew daim ntawv qhia, https://www.weirminerals.com/products_services/cavex.aspx.

Hydrocyclones yuav luag universally siv nyob rau hauv sib tsoo circuits vim lawv muaj peev xwm thiab cov txheeb ze efficiency. Lawv tuaj yeem faib ua ntau yam ntawm qhov ntau thiab tsawg (feem ntau yog 5-500 μm), cov kab me me uas siv rau kev faib ua kom zoo dua. Txawm li cas los xij, daim ntawv thov cyclone hauv magnetite sib tsoo circuits tuaj yeem ua rau kev ua haujlwm tsis zoo vim qhov sib txawv ntawm qhov sib txawv ntawm magnetite thiab khib nyiab (silica). Magnetite muaj qhov ceev tshwj xeeb ntawm 5.15, thaum silica muaj qhov ceev ntawm kwv yees li 2.7. Hauvhydrocyclones, cov zaub mov tsis txaus nyias nyias nyias muaj nyias qhov nyias muaj zog ntau dua li cov zaub mov sib dua. Yog li ntawd, liberated magnetite yog concentrated nyob rau hauv lub cyclone underflow, nrog rau qhov overgrinding ntawm magnetite. Napier-Munn et al. (2005) tau sau tseg tias kev sib raug zoo ntawm kev kho qhov loj me (d50c) thiab particle density ua raws li ib qho kev qhia ntawm daim ntawv hauv qab no nyob ntawm cov dej ntws thiab lwm yam:


d50c∝ρs−ρl−n

 

qhov twgρs yog solids density,ρl yog cov kua ntom ntom, thiabnyog nruab nrab ntawm 0.5 thiab 1.0. Qhov no txhais tau hais tias cov nyhuv ntawm cov ntxhia ntom ntom ntawm kev ua haujlwm cyclone tuaj yeem yog qhov tseem ceeb heev. Piv txwv li, yog tias covd50c ntawm magnetite yog 25 μm, ces tusd50c ntawm silica hais yuav yog 40-65 μm. Daim duab 8.13 qhia tau hais tias cyclone classification efficiency curves rau magnetite (Fe3O4) thiab silica (SiO2) tau los ntawm kev soj ntsuam ntawm ib tug industrial pob zeb magnetite sib tsoo circuit. Qhov loj sib cais rau silica yog ntau coarser, nrog ad50c rau Fe3O4 ntawm 29 μm, thaum SiO2 yog 68 μm. Vim qhov tshwm sim no, cov magnetite sib tsoo mills nyob rau hauv kaw circuits nrog hydrocyclones yog tsawg npaum thiab muaj peev xwm qis dua piv rau lwm lub hauv paus metalore sib tsoo circuits.

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Daim duab 8.13. Cyclone efficiency rau magnetite Fe3O4 thiab silica SiO2 - kev soj ntsuam kev lag luam.

 

High Pressure Process Technology: Cov hauv paus ntsiab lus thiab kev siv

MJ Cocero PhD, hauv Industrial Chemistry Library, 2001

Cov khoom sib cais

Hydrocyclone

Qhov no yog ib qho yooj yim ntawm cov khoom sib cais. Nws yog cov cuab yeej sib cais ua tau zoo thiab tuaj yeem siv los tshem tawm cov khib nyiab ntawm qhov kub thiab txias. Nws yog kev lag luam vim nws tsis muaj qhov txav thiab yuav tsum tau kho me ntsis.

Kev sib cais efficiency rau cov khib nyiab yog qhov muaj zog ntawm cov particle-loj thiab kub. Kev sib cais tag nrho ze li 80% yog ua tiav rau silica thiab kub siab tshaj 300 ° C, thaum nyob rau hauv tib qhov kub thiab txias, tag nrho kev sib cais ua tau zoo rau denser zircon hais yog ntau dua 99% [29].

Lub ntsiab tsis zoo ntawm kev ua haujlwm hydrocyclone yog qhov nyiam ntawm qee cov ntsev kom ua raws li cov phab ntsa cyclone.

Hla micro-filtration

Hla-flow lim coj tus cwj pwm zoo ib yam li uas ib txwm pom nyob rau hauv crossflow pom nyob rau hauv ambient tej yam kev mob: nce shear-rates thiab txo cov kua-viscosity ua rau muaj ntau filtrate tooj. Hla-microfiltration tau siv rau kev sib cais ntawm cov ntsev precipitated raws li cov khib nyiab, muab cov khoom sib cais ua tau zoo feem ntau tshaj 99.9%. Goemansua al.[30] kawm txog kev sib cais ntawm sodium nitrate los ntawm dej supercritical. Nyob rau hauv cov xwm txheej ntawm txoj kev tshawb no, sodium nitrate yog tam sim no raws li molten ntsev thiab muaj peev xwm hla lub lim. Kev sib cais ua tau zoo tau txais qhov sib txawv ntawm qhov kub thiab txias, txij li qhov solubility txo qis thaum qhov kub nce, xws li ntawm 40% thiab 85%, rau 400 ° C thiab 470 ° C, feem. Cov neeg ua haujlwm no piav qhia txog kev sib cais raws li qhov tshwm sim ntawm qhov sib txawv permeability ntawm cov lim nruab nrab ntawm cov tshuaj supercritical, tsis zoo li cov ntsev ntsev, raws li lawv cov viscosities kom meej meej. Yog li ntawd, nws yuav ua tau tsis tau tsuas yog lim precipitated ntsev xwb raws li cov khib nyiab tab sis kuj lim cov uas tsis muaj melting point ntsev uas nyob rau hauv ib tug molten lub xeev.

Cov teeb meem kev khiav hauj lwm feem ntau yog los ntawm lim-corrosion los ntawm cov ntsev.

 

Daim ntawv: Recycling thiab Recycled Materials

MR Doshi, JM Dyer, hauv Reference Module hauv Materials Science thiab Materials Engineering, 2016

3.3 Kev ntxuav

Cleaners los yoghydrocyclonestshem tawm cov kab mob los ntawm cov ntaub so ntswg raws li qhov sib txawv ntawm qhov sib txawv ntawm cov pa paug thiab dej. Cov khoom siv no muaj conical los yog cylindrical-conical siab hlab ntsha mus rau hauv lub pulp yog pub tangentially ntawm txoj kab uas hla loj kawg (Daim duab 6). Thaum lub sij hawm dhau los ntawm lub tshuab ntxhua khaub ncaws, lub pulp tsim ib lub vortex flow qauv, zoo ib yam li lub cyclone. Cov dej rotates nyob ib ncig ntawm lub hauv paus axis thaum nws dhau los ntawm lub inlet thiab mus rau lub apex, los yog underflow qhib, nyob rau hauv lub tsev ntxhua khaub ncaws. Lub rotational flow velocity accelerates raws li txoj kab uas hla ntawm lub khob hliav qab txo. Nyob ze ntawm lub apex kawg qhov me me txoj kab uas hla qhib txwv tsis pub tawm ntawm feem ntau ntawm cov ntws uas es tsis txhob rotates nyob rau hauv ib tug puab vortex ntawm lub hauv paus ntawm lub tshuab nqus tsev vacuum. Cov dej ntws ntawm lub hauv paus tseem ceeb ntws tawm ntawm lub apex qhib kom txog thaum nws tawm los ntawm lub vortex finder, nyob rau ntawm txoj kab uas hla loj kawg nyob rau hauv nruab nrab ntawm lub tshuab nqus tsev vacuum. Cov khoom siv ntom ntom ntom dua, tau muaj cov khoom siv ntawm phab ntsa ntawm lub tshuab nqus tsev, yog tso tawm ntawm apex ntawm lub khob hliav qab (bliss, 1997).

Daim duab 6. Qhov chaw ntawm hydrocyclone, cov qauv ntws loj thiab kev sib cais.

Cov tshuaj ntxuav tau raug cais raws li qhov siab, nruab nrab, lossis qhov ntom ntom nyob ntawm qhov ntom thiab qhov loj ntawm cov khoom paug raug tshem tawm. Lub tshuab nqus tsev siab, nrog txoj kab uas hla ntawm 15 mus rau 50 cm (6-20 nyob rau hauv) yog siv los tshem tawm tramp hlau, ntawv clips, thiab staples thiab feem ntau yog positioned tam sim ntawd tom qab pulper. Raws li txoj kab uas hla ntawm lub tshuab nqus tsev vau txo qis, nws cov txiaj ntsig ntawm kev tshem tawm cov kab mob me me yuav nce ntxiv. Rau cov tswv yim thiab kev lag luam, 75-mm (3 nyob rau hauv) txoj kab uas hla yog feem ntau yog cov khoom siv hluav taws xob tsawg tshaj plaws siv hauv kev lag luam ntawv.

Cov tshuaj ntxuav rov qab thiab cov tshuaj ntxuav dej ntws tawm yog tsim los tshem tawm cov kab mob tsawg xws li siv quav ciab, polystyrene, thiab cov nplaum nplaum. Cov tshuaj ntxuav thim rov qab muaj npe vim tias cov dej lees txais tau sau ntawm lub tshuab ntxhua khaub ncaws thaum lub qhov tso tawm ntawm qhov dej ntws tawm. Nyob rau hauv lub viav vias nqus tsev ntxhua khaub ncaws, lees txais thiab tsis lees txais kev tawm ntawm tib qhov kawg ntawm lub tshuab nqus tsev ntxhua khaub ncaws, nrog kev lees txais nyob ze ntawm phab ntsa nqus tsev ntxhua khaub ncaws sib cais los ntawm kev tsis lees paub los ntawm lub hauv paus raj nyob ze ntawm lub hauv paus ntawm lub tshuab nqus tsev vacuum, raws li qhia hauv daim duab 7.

Sau npe mus download tau daim duab puv loj

Daim duab 7. Schematics ntawm lub tshuab nqus dej ntws.

Nruam centrifuges siv nyob rau hauv 1920s thiab 1930s kom tshem tawm cov xuab zeb los ntawm cov tawv nqaij raug txiav tawm tom qab kev loj hlob ntawm hydrocyclones. Lub Gyroclean, tsim los ntawm Center Technique du Papier, Grenoble, Fabkis, muaj ib lub tog raj kheej uas tig ntawm 1200–1500 rpm (Bliss, 1997; Julien Saint Amand, 1998, 2002). Kev sib xyaw ua ke ntawm lub sijhawm nyob ntev ntev thiab lub zog centrifugal siab tso cai rau cov khoom tsis muaj paug tsawg txaus sijhawm los mus rau lub hauv paus ntawm lub tshuab ntxhua khaub ncaws uas lawv tsis lees paub los ntawm qhov chaw vortex tawm.

 

MT Thew, hauv Encyclopedia of Separation Science, 2000

Synopsis

Txawm tias cov khoom-kuahydrocyclonetau tsim los rau feem ntau ntawm lub xyoo pua 20th, txaus siab ua kua-kua sib cais kev ua tau zoo tsis tuaj txog rau xyoo 1980s. Kev lag luam roj offshore tau xav tau cov khoom siv compact, ruaj khov thiab txhim khu kev qha rau kev tshem tawm cov roj sib cais los ntawm dej. Qhov kev xav tau no tau txaus siab los ntawm ntau yam sib txawv ntawm hydrocyclone, uas tau kawg tsis muaj qhov txav mus los.

Tom qab piav qhia qhov xav tau no ntau dua thiab muab piv nrog cov khoom sib cais-kua cyclonic sib cais hauv kev ua cov ntxhia, cov txiaj ntsig zoo uas cov hydrocyclone tau tshaj tawm cov khoom siv ua ntej kom tau raws li lub luag haujlwm tau muab.

Kev ntsuas kev ua tau zoo ntawm kev sib cais tau teev tseg ua ntej kev sib tham txog kev ua tau zoo raws li kev cai lij choj pub, kev tswj hwm tus neeg teb xov tooj thiab lub zog xav tau, piv txwv li cov khoom ntawm kev poob siab thiab flowrate.

Ib puag ncig rau kev tsim roj av teeb tsa qee qhov kev txwv rau cov ntaub ntawv thiab qhov no suav nrog cov teeb meem ntawm cov khoom yaig. Cov ntaub ntawv uas siv tau raug hais. Cov ntaub ntawv txheeb ze tus nqi rau hom roj sib cais cog, ob qho tib si peev thiab rov tshwm sim, tau piav qhia, txawm tias qhov chaw tsis tshua muaj. Thaum kawg, qee qhov taw qhia rau kev txhim kho ntxiv tau piav qhia, raws li kev lag luam roj zoo li cov cuab yeej nruab rau ntawm lub txaj hauv hiav txwv lossis txawm nyob hauv qab ntawm lub qhov dej.

Sampling, Control, thiab Mass Balancing

Barry A. Wills, James A. Finch FRSC, FCIM, P.Eng., hauv Wills' Mineral Processing Technology (Eighth Edition), 2016

3.7.1 Siv Particle Loj

Ntau units, xws lihydrocyclonesthiab lub ntiajteb txawj nqus sib cais, tsim kom muaj kev sib cais ntawm qhov loj me thiab cov ntaub ntawv me me tuaj yeem siv rau kev ntsuas huab hwm coj (Piv txwv 3.15).

Piv txwv 3.15 yog ib qho piv txwv ntawm qhov tsis sib npaug ntawm qhov txo qis; nws muab, piv txwv li, tus nqi pib rau qhov generalized tsawg squares minimization. Cov duab nraaj no tuaj yeem siv tau thaum twg muaj "ntau" cov ntaub ntawv tivthaiv; hauv Piv txwv 3.9 nws tuaj yeem siv tau.

Piv txwv 3.15 siv lub cua daj cua dub ua cov node. Qhov thib ob yog lub pob: qhov no yog ib qho piv txwv ntawm 2 inputs (fresh feed and ball milldischarge) and one output (cyclone feed). Qhov no muab lwm qhov sib npaug (Piv txwv 3.16).

Hauv Tshooj 9 peb rov qab mus rau qhov piv txwv ntawm kev sib tsoo Circuit Court siv cov ntaub ntawv hloov kho los txiav txim siab qhov kev faib tawm ntawm lub voj voog.


Post lub sij hawm: May-07-2019
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