Tshem tawm cov hlau nplaum sib nqus (cov hlau nplaum sib nqus) tau teeb tsa saum toj kawg nkaus conveyor siv kom tshem tawm cov hlau tramp -cov hniav, cov cuab yeej tawg, pob zeb bolts- ua ntej cov khoom nkag mus rau hauv crushers lossis mills. Ib qho ntawm tramp hlau nyob rau hauv qhov cuam tshuam crusher tuaj yeem ua rau 50,000-50,000-200,000 hauv kev puas tsuaj ntxiv rau hnub poob. Phau ntawv qhia no npog tiv thaiv crushers los ntawm tramp hlau, sib piv mus tas li vs. electromagnetic overbands, muab cov ntaub ntawv rooj ntawm lub zog noj thiab qhov hnyav, thiab xam qhov siab ncua kev kawm ntawv qhov siab thiab siv ceev.
Tiv thaiv Crushers thiab Shredders los ntawm Tramp Hlau puas
Conveyor siv nyob rau hauv mining nqa 500-5,000 tonnes ib teev ntawm ore, thee, los yog aggregate. Tramp hlau (ferrous khib nyiab) tuaj yeem yog:
Me me (<50mm): causes accelerated wear of crusher liners. Each 10mm piece passing through a cone crusher reduces liner life by 1-2%.
Nruab Nrab (50-200mm): tuaj yeem ntim cov khoom sib tsoo, xav tau 4-12 teev ntawm downtime kom meej.
Large (>200mm): tej zaum yuav tawg crusher lub ntsiab ncej los yog vaj tse, tag nrho cov khoom poob.
Ncua kev sib nqus sib nqus sib nqus mounted 200-500mm saum toj no siv deg extract tramp hlau tsis tu ncua. Cov hlau nplaum nqa cov khoom tawm ntawm txoj siv thiab tuav lawv tawm tsam ib txoj siv txav los yog phaj ruaj khov. Ib qho kev tso tawm tsis siv neeg tshem tawm tramp hlau mus rau hauv cov khoom ntim.
Sib Nqus Sib Nqus Overbands vs. Electromagnetic Separators
Ob hom dominate:
Kev ruaj ntseg overbands: Siv qib siab -qib NdFeB hlau nplaum (N45SH lossis N50) nrog lub voj voog hlau. Tsis siv zog. Teb lub zog ntawm txoj siv tawv: 1,500-3,000 Gauss feem ntau (nyob ntawm qhov siab). Kev ua haujlwm tas mus li, tsis tuaj yeem muab tua. Haum rau kev siv qhov twg tramp hlau yog nruab nrab thiab siv ceev<2 m/s.
Electromagnetic overbands: Use a DC electromagnet (copper or aluminum coil). Require 2-15 kW of power. Field strength: 2,500-5,000 Gauss at same height. Can be pulsed for higher peak fields. Can be switched off for cleaning or maintenance. Suitable for heavy tramp iron (large excavator teeth, drill bits) and high belt speeds (>2 m/s).
Cov lus sib piv: Permanent vs. Electromagnetic suspended separators
| Parameter | Permanent Overband (NdFeB) | Electromagnetic Overband |
|---|---|---|
| Kev siv hluav taws xob (kW, raug) | 0 | 5-12 (rau 1m txoj siv dav) |
| Sib nqus teb ntawm 300mm qhov siab (Gauss) | 1,800 – 2,500 | 3,500 – 5,000 |
| Maximum tramp hlau daim loj | Mus txog 15 kg | Txog li 50 kg + |
| Txoj siv ceev tshaj plaws (m / s) | 2.0 (tus qauv), 2.5 (siab-force) | 3.5 |
| Qhov hnyav (kg rau 1m txoj siv dav) | 1,200 – 1,800 | 2,000 - 3,500 (nrog rau transformer) |
| Kub rhiab heev | NdFeB derates saum 80 degree; siv SmCo rau kub ore | Ambient txwv los ntawm coil rwb thaiv tsev (Class F 155 degree) |
| Kev tu ncua | Tsis muaj (magnetic circuit) | Xyuas cov terminals, cua txias kiv cua txhua xyoo |
| Tus nqi yuav khoom sib txheeb (ib chav tsev) | 1.0 (lub hauv paus) | 1.8 – 2.5 |
| Tej daim ntawv thov | Coal, aggregate, recycling | Hlau ore, tooj liab ore, hnyav mining |
Xam qhov Optimal Suspension Height thiab Belt Speed
Kev ncua qhov siab (sab hauv qab rau txoj siv tawv) yog qhov tseem ceeb. Siab dhau: txo qhov sib nqus quab yuam, tramp hlau misses capture. Tsawg dhau lawm: txoj siv sia tiv thaiv kev pheej hmoo thiab cov khoom siv - nce. Txoj cai ntawm tus ntiv tes xoo: Qhov siab=siv dav × 0.2 txog 0.3. Rau 1000mm siv: 200-300mm clearance.
Rau txhua qhov kev teeb tsa, peb suav qhov xav tau sib nqus quab yuam (F_m) xav tau los nqa tramp hlau vertically tiv thaiv txoj siv ceev rub thiab lub ntiajteb txawj nqus. Simplified formula:
F_m=m × (g + a) + F_drag
qhov twg m=tramp hlau loj (kg), g=9.81 m / s², ib=ntsug acceleration los ntawm hlau nplaum rub (nyob ntawm gradient), F_drag=siv kev sib txhuam.
Ntawm txoj siv ceev v (m / s), lub sijhawm ntes tau thaum tramp hlau hla ntawm thaj chaw sib nqus ntawm qhov ntev L (m) yog t=L / v. Rau ib qho kev cuam tshuam nrog L=1.2m thiab v=2 m / s, t=0.6 vib nas this. Thaum lub sij hawm no, cov hlau nplaum yuav tsum rub lub tramp hlau los ntawm txoj siv mus rau hlau nplaum. Derivative: yog tramp hlau hnyav los yog siv ceev ceev, koj xav tau ib tug muaj zog electromagnet los yog txo qhov ceev.
Peb muab cov kev xaiv software: cov tswv yim siv dav, ceev, tramp hlau loj / faib, thiab peb tso tawm cov qauv pom zoo, qhov siab, thiab kev kwv yees kev ua tau zoo (feem ntau 95-99% rau cov khoom loj kom raug).
Rau daim ntawv thov nrog txoj siv ceev tshaj 2.5 m / s lossis tramp hlau tshaj 20kg, peb pom zoo kom muaj lub tshuab hluav taws xob nrog qhov sib sib zog nqus - qhov chaw nkag thiab tsis siv neeg hlau ntes cov dej ntws los ua kom muaj zog coil tam sim no thaum kuaj pom cov khoom loj.
Rau tshem tawm magnetic separators (overband) rau mining thiab conveyor pom, thov mus saib peb Magnetic Separation & Filtration khoom nplooj ntawv ntawm peb lub vev xaib. Peb muab cov qauv mus tas li thiab electromagnetic rau txoj siv dav ntawm 500mm txog 2000mm.
Txhawm rau kom tau txais daim ntawv xaiv thiab pob nyiaj siv rau koj cov khoom siv conveyor, hu rau peb pawg neeg ua haujlwm sib cais. Peb kuj muab cov chav tsev xauj rau ntawm - qhov chaw kuaj.
Cov lus nug nquag
Q: Kuv yuav ua li cas ntxuav cov hlau nplaum tas mus li yam tsis tau kaw lub conveyor?
A: Tsis tu ncua overbands nrog rau tus kheej - txoj siv tu (lub overband nws tus kheej roj hmab siv rotates, rub lub tramp hlau sab mus rau hauv ib tug paug chute). Rau phau ntawv -tu chav tsev (chaw nyob ruaj ruaj) koj yuav tsum nres lub conveyor; tsis pom zoo rau hnyav tramp hlau.
Q: Yuav ua li cas yog tias txoj siv conveyor muaj cov hlau nplaum (xws li magnetite)?
A: Txheem overband yuav rho tawm magnetite nrog rau tramp hlau, sau cov khoom ntim sai. Siv lub tshuab electromagnetic nrog lub ntsuas hlau uas ua haujlwm tsuas yog thaum kuaj pom cov hlau loj loj, lossis siv cov khoom tsis tshua muaj -lub ntiaj teb nruas cais qis qis kom rov qab tau cov hlau nplaum.
Q: Ntev npaum li cas cov hlau nplaum yuav tsum tau kuaj?
A: Every 6 months. Use a Gauss meter at a fixed point on the magnet face (cold, no tramp iron). If field has dropped >15% ntawm tus nqi qub, rov qab rau remagnetization (rau cov chav nyob ruaj khov) lossis kos cov kauj / rectifier (rau electromagnetic). Peb muab ib daim ntawv teev nrog rau txhua chav.
