Nyob rau hauv theem nrab steelmaking ladles thiab hloov cov hlab ntsha, refractory hauv ob sab phlu yuav tsum ua siab ntev thermal cycling, muaj zog argon bubbling turbulence, thiab hnyav tshuaj dissolution los ntawm hluavtaws refining slags. Ntawm cov kab slag molten, kua FeO, MnO, thiab calcium-aluminate fluxes sai sai tua cov pa oxide refractories. Kev qhia txog kev ua haujlwm siab ntawm magnesia carbon cib nrog cov ntsiab lus flake graphite thiab nws yog xim hlau los tiv thaiv oxidation additives sawv cev rau cov kev daws teeb meem zoo tshaj plaws rau kev nthuav tawm cov phiaj xwm hauv ob sab phlu. Ntawm Topower Refractory, peb engineers thiab muab cov khoom siv high-density resin-bonded MgO-C refractories formulated nrog hwm fused magnesia thiab high-purity crystalline flake graphite kom optimize steel ladle refractory kev pab cuam lub neej thoob ntiaj teb.
Cov Ntsiab Lus Qhia Txog Qhov Tseeb
Standard Steel Ladle Series: JLF8BI / JLF8BN (Kev cuam tshuam hauv qab & tsis muaj kev cuam tshuam, FC 8%), JLF10BC (Tshuaj pad, FC 10%), JLF12MP / JLF12MN (hlau kab purging & tsis-purging, FC 12%), thiab JLF14SP / JSLF12 purging (Non-purging line, FC 12%) 14%).
Bulk Density & Strength: High bulk density from 3.00 to 3.10 g/cm3; apparent porosity tightly held at 3.0% to 5.0%; cold crushing strength >= 40 mus rau 45 MPa; Kub modulus ntawm rupture (HMOR ntawm 1400 degree) mus txog 10 mus rau 12 MPa.
Anti-Oxidation Systems: Synergistic Al, Mg, thiab B4C nws yog xim hlau thiab carbide antioxidants koom nrog txhawm rau txhawm rau txhawm rau graphite burnout thiab tsim nyob rau hauv-situ tiv thaiv ceramic spinels.
Factory Direct Sourcing: Tshuab nias hauv qab 1200 txog 2500 tuj hydraulic txhuam presses, nqus impregnated, thiab kub-kho ntawm 200℃mus rau 250 degree. Lub sij hawm xa tawm 10 mus rau 15 hnub FOB Qingdao / Tianjin.
Magnesia Carbon Cib yog dab tsi?
A Magnesia carbon cibis an unfired, resin-bonded basic refractory combining large-crystal fused magnesia (purity 97% to 98.5% MgO) or dead-burned sintered magnesia with high-purity natural crystalline flake graphite (purity >= 95% rau 97% Carbon). Synthetic thermosetting phenolic resins ua haujlwm ua cov kua roj carbonaceous binders, imparting siab ntsuab tuav lub zog thiab tsim muaj zog residual carbon-carbon bonds raws li thermal decomposition.
Kev sib xyaw ua ke ntawm fused magnesia thiab graphite muab ob qho kev ua haujlwm zoo:
Exceptional Slag Tsis-Wetting: Graphite muaj cov dej tsis zoo heev tiv thaiv cov hlau thiab oxide slags (wetting kaum> 90 degree). Qhov no tiv thaiv aggressive kua slags los ntawm infiltrating refractory pores.
Siab Thermal Shock Resistance: Ntuj flake graphite imparts siab thermal conductivity thiab tsawg thermal expansion. Thaum tshav kub kub disperses sai heev nyob rau hauv lub cib lub cev, tiv thaiv spalling thaum lub sij hawm ladle preheating, tapping, thiab tapping-ncua thermal swings.
Kev qhia tshwj xeeb: Topower JLF Steel Ladle Series
Ladle refractory hnav txawv heev los ntawm thaj tsam hauv qab mus txog rau kab slag. Hauv qab no yog cov ntaub ntawv pov thawj ntawm peb cov JLF series MgO-C refractory formulations:
| Technical Parameter / Khoom | JLF8BI (Kev cuam tshuam hauv qab) | JLF10BC (hauv qab Pad) | JLF12MP (Hlau Zone Purging) | JLF14SP (Slag Kab Purging) | JLF13FB (Freeboard Zone) | Test Standard |
|---|---|---|---|---|---|---|
| MgO Cov ntsiab lus (%) | >= 90.0 | >= 88.0 | >= 86.0 | >= 84.0 | >= 85.0 | ASTM C114 |
| Tsau Carbon - FC (%) | 7.5 - 8.5 | 9.5 - 10.5 | 11.5 - 12.5 | 13.5 - 14.5 | 12.5 - 13.5 | ASTM C 571 Cov khoom siv |
| Al2O3 / Antioxidants (%) | 1.8 - 2.2 | 1.8 - 2.2 | 1.8 - 2.2 | 1.8 - 2.2 | 1.8 - 2.2 | XRF Analysis |
| Qhov ceev (g / cm3) | >= 3.00 | >= 3.00 | >= 3.05 | >= 3.10 | >= 3.00 | ASTM C134 |
| Pom tseeb Porosity (%) | <= 4.0 | <= 4.0 | <= 4.0 | <= 3.0 | <= 5.0 | ASTM C20 |
| Txias Crushing Zog (MPa) | >= 45.0 | >= 45.0 | >= 45.0 | >= 40.0 | >= 40.0 | ISO 10059 Daim Ntawv Pov Thawj |
| HMO @ 1400℃(MPa) | >= 8.0 | >= 8.0 | >= 10.0 | >= 10.0 | >= 6.0 | ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C 583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583, ASTM C583 |
| Thermal Expansion @ 1000 degree | 1.05% | 1.00% | 0.95% | 0.88% | 0.92% | Dilatometry |
Nco tseg: Kev cai cib qhov ntev, suav nrog cov cib tseem ceeb, cov cib cib, thiab cov kab hluav taws xob sab nraud, raug nias kom phim cov neeg siv khoom hauv ob sab phlu kev kos duab nrog kev kam rau siab +/- 1.0 hli.
Graphite Content Optimization: 8% vs 14% Carbon
Xaiv cov ntsiab lus graphite zoo tagnrho yog qhov tsim nyog engineering cuam tshuam ntawm slag corrosion resistance thiab mechanical structural integrity:
Tsawg Graphite Formulations (8% mus rau 10% FC, Qib JLF8BI & JLF10BC):
Tsawg Carbon Pick-Up: Qhov tseem ceeb rau kev tsim cov pa roj carbon tsawg (ULC) thiab hluav taws xob qib steels uas steel re-carburization yuav tsum tiv thaiv.
Siab txias thiab kub zog: Tsawg graphite feem ua rau muaj kev sib zog ntau dua ntawm fused magnesia nplej, muab cov neeg kho tshuab puas ntsoog tiv thaiv kev kub siab ua kua hlau cuam tshuam hauv qab cov kwj dej.
Thermal rwb thaiv tsev: Kev hloov hluav taws xob qeeb qeeb los ntawm kev ua haujlwm refractory hauv ob sab phlu, txo lub plhaub ntawm daim tawv nqaij kub thiab txo qis lub plhaub plhaub deformation.
High Graphite Formulations (12% mus rau 14% FC, Qib JLF12MP & JLF14SP):
Maximum Slag Kab Corrosion Barrier: Cov ntsiab lus graphite siab dua tsim cov khoom sib nqus, tsis ntub dej carbonaceous tes hauj lwm uas tiv taus cov hauv paus loj (CaO/SiO2> 3.0) thiab cov txheej txheem qis refining slags.
Superior Thermal Spalling Immunity: Qhov siab tshaj plaws thermal conductivity txo qhov kub thiab txias gradients thaum lub sij hawm ncua sij hawm theem nrab metallurgy refining (LF thiab VD nqus tsev degassing).
Anti-Oxidation Systems & Slag Corrosion Defense
Graphite oxidizes sai heev hauv huab cua siab tshaj 400℃los tsim CO thiab CO2, tawm hauv qab ntxeem tau, friable magnesia skeletons yooj yim rau slag yaig. Txhawm rau tshem tawm oxidation, niaj hnub carbon-bonded yooj yim refractories koom nrog hlau thiab carbide antioxidants:
1. Hlau Aluminium (Al) Mechanism
Fine aluminium hmoov reacts nrog ambient oxygen thiab carbon monoxide ntawm qhov kub thiab txias:
4 Al + 3 O2 -> 2 Al2O3 4 Al + 3 C ->Al4C3
Raws li qhov kub thiab txias siab dhau 1000 degree, lub hauv-situ tsim Al4C3 reacts nrog CO thiab MgO kom yield zoo magnesium aluminate spinel (MgAl2O4). Qhov thib ob spinel no crystallizes hauv matrix pores, txo cov porosity pom tseeb thiab lub cev thaiv cov pa oxygen ingress.
2. Boron Carbide (B4C) Synergies
Hauv cov kab ladle slag tseem ceeb, qhov sib ntxiv me me ntawm B4C hnov mob nrog cov pa oxygen los tsim cov viscosity kua boria (B2O3) theem uas kaw cov micro-cracks ua ntej siv lead ua sintering, kom ruaj khov graphite ntev.
Ladle Zoning thiab Sourcing Qhov Zoo Tshaj Plaws
Maximizing ladle phiaj los nqis tes lub neej yuav tsum muaj kev sib npaug zoning kom ua tau raws li kev hnav refractory:
Slag Line (Highest Wear): NruabJLF14SP(14% FC, fused magnesia 98% purity). Xyuas kom cov ntaub ntawv ua haujlwm tau rov qab nrog ntom ntomcalcium aluminate cementkev ruaj ntseg castables los yogqis cement castablekev ruaj ntseg hauv ob sab phlu dhau lub zog siabsiab alumina cibsub-txheej.
Hlau chim & Hauv qab Impact Zone: NruabJLF8 IBlos yogJLF10BC(8% mus rau 10% FC) kom tiv taus cov neeg kho tshuab hnyav los ntawm tapping kwj thiab dej da dej txav.
Dry Mortar & Jointing: Tso tag nrho cov cib ua haujlwm nrog cov qib siab carbon-raws li cov hmoov qhuav sib koom ua ke los yog cov nplaum nplaum nplaum nplaum nplaum nrog cov sib koom ua ke<= 0.5 mm to prevent steel penetration between courses.
Preheating raws tu qauv: Qhuav ladles nrog roj burners siv tus nqi ramp tsis tu ncua (50℃ib teev mus rau 300 degree, ua raws li 100℃ib teev mus rau 1000 degree) nyob rau hauv txo cov nplaim taws kom tsis txhob ntxov ntxov graphite oxidation.
Ntim, Cia & Export Sourcing
Vim hais tias MgO-C refractories yooj yim muaj cov dawb magnesia thiab hlau additives raug rau atmospheric noo noo hydration, ntim kom zoo yog qhov tseem ceeb:
Nqus Moisture Ntim: Cov cib tau ntim rau ntawm cov khoom siv hluav taws xob kho cua sov fumigated ntoo pallets, interlaid nrog corrugated cardboard, nruj nreem qhwv nrog polyethylene shrink zaj duab xis tuab, thiab cov hnab desiccant tau muab tso rau hauv txhua lub pallet.
Lub neej cia: Unopened pallets khaws cia rau hauv qhuav, zoo-ventilated nyob rau hauv tsev warehouses khaws tag nrho cov ntaub ntawv pov thawj rau 6 mus rau 9 lub hlis.
Kev soj ntsuam tag nrho Traceability: Txhua qhov ntau lawm yog kuaj thiab kuaj kom pom tseeb porosity, bulk ntom, carbon cov ntsiab lus, thiab compressive zog. Mill daim ntawv pov thawj nrog rau txhua qhov khoom xa tuaj.
Transparent Sourcing: Nqe & Yuav Ua Li Cas
Topower Refractory khoom siv engineered magnesia carbon bricks ncaj qha rau hluav taws xob arc rauv mini-mills thiab integrated steel nroj tsuag:
Technical RFQ Checklist
Yuav kom tau txais cov ncauj lus kom ntxaws txheej txheej thiab cov lus hais hauv 4 teev, muab:
Ladle Capacity & Refining Profile: Ladle tonnage (50t, 100t, 150t, thiab lwm yam), LF refining lub sij hawm, thiab VD / VOD lub tshuab nqus tsev kho lub sijhawm.
Cib hom yuav tsum tau: Slag kab, chim, hauv qab cuam tshuam ncoo, los yog EBT taphole lub tes tsho.
Order Tonnage: Yam tsawg kawg nkaus kev txiav txim yog 10 metric tons (Full thawv load FCL yog 22 mus rau 25 metric tons ib 20GP thawv).
Ladle Lineing Drawings: Sab nraud txoj kab uas hla, phab ntsa taper, thiab kev ruaj ntseg hauv ob sab phlu rau tapered tseem ceeb xam.
Chaw nres nkoj: Rau tam sim FOB Qingdao / Tianjin lossis CIF tus nqi suav.
Kev Lag Luam Tus Nqi Siv: High-performance MgO-C refractory qib feem ntau yog li ntawm 650 mus rau 950 USD ib metric ton FOB Tuam Tshoj rau cov qauv hlau cheeb tsam daim ntaub ntawv, thiab 950 rau 1450 USD ib metric tuj rau high-purity fused magnesia slag kab qib nrog hluavtaws metallic antioxidants.
Direct Engineering Support: Hu rau peb pab neeg ua haujlwm steelmaking refractory ntawm inquiry@topower.tech los tshuaj xyuas cov duab kos duab los yog thov cov qauv kuaj kuaj.
Cov lus nug nquag
Vim li cas fused magnesia nyiam tshaj sintered magnesia hauv slag kab?
Fused magnesia nta loj periclase siv lead ua nplej (feem ntau> 600 txog 1000 microns) nrog tsawg kawg silicate grain ciam teb. Cov pob zeb loj periclase ua rau txo qis ntawm thaj tsam ntawm qhov chaw ntawm lub ntsej muag raug rau molten slag, ua rau qeeb cov tshuaj lom neeg tawg yooj yim piv rau cov nplua-grained sintered magnesia.
Dab tsi ua rau periclase hydration hauv MgO-C cib thaum khaws cia?
Magnesia (MgO) readily reacts with atmospheric water vapor to form magnesium hydroxide [Mg(OH)2]. This hydration reaction produces a large volumetric expansion (>100%), tsim micro-cracks thiab ua rau cov txheej txheem crumbling. Nqus qhwv thiab qhuav hauv tsev cia yog qhov tseem ceeb los tiv thaiv hydration.
Puas muaj peev xwm cob-bonded bricks tau nteg nrog cov pa refractory mortar?
Tsis yog. Cov dej sib xyaw ua ke yuav tsum tsis txhob siv vim tias dej ua rau cov dej tawg tam sim ntawd ntawm lub ntsej muag kub. Magnesia carbon bricks yuav tsum tau muab tso rau qhuav los yog nrog anhydrous resin-bonded carbonaceous mortars.
