Hauv kev lag luam hlau thiab hlau metallurgy, deoxidation yog txheej txheem tseem ceeb uas txiav txim siab kev huv, kev ua tau zoo, thiab tus nqi ntawm cov khoom hlau kawg. Ferrosilicon, uas yog ib qho tseem ceeb tshaj plaws deoxidizers, yog xaiv tsis yog vim nws cov tshuaj muaj pes tsawg leeg, tab sis kuj, thiab tseem ceeb tshaj, vim nws lub cev morphology -tshwj xeeb tshaj yog nws loj.
Cov ntsiab lus ntawm steel deoxidation yog hloov cov pa oxygen mus rau hauv cov oxide ruaj khov los ntawm kev ntxiv cov ntsiab lus nrog cov pa oxygen muaj zog (xws li silicon thiab aluminium), uas tom qab ntawd ntab mus rau saum npoo kom tshem tawm.Ferrosilicon (FeSi)tau dhau los ua lub ntsiab deoxidizer vim nws cov kev ua haujlwm siab thiab kev lag luam.
Txawm li cas los xij, cov tshuaj tiv thaiv deoxidation tsis yog ib qho yooj yim stoichiometry tab sis cov txheej txheem physicochemical tswj los ntawm huab hwm coj hloov. Cov tshuaj tiv thaiv tus nqi yog tsuas yog txwv los ntawm:
Tus nqi ntawm silicon dissolution thiab diffusion rau hauv cov hlau molten.
Tus nqi ntawm qhov tsim SiO₂ suav nrog tshem tawm ntawm cov tshuaj tiv thaiv cuam tshuam thiab ntab mus rau saum npoo.
Ntawm cov xwm txheej no, qhov loj me (loj) ntawm ferrosilicon yog ib qho ntawm cov kev txiav txim siab uas cuam tshuam rau thawj tus nqi - txwv cov kauj ruam.
Loj npaum li cas txhais tau li cas -Los ntawm Macroscopic Bulk mus rau Microscopic Powder
Lub cev tshwj xeeb ntawm FeSi alloy feem ntau yog cais raws li nws qhov loj tshaj plaws:
Lumps:10-100 hli. Daim ntawv tsoos, haum rau batch ntxiv rau silos nyob rau hauv loj converters los yog hluav taws xob furnaces.
Granules:1-10 hli. Lub ntsiab ntawm niaj hnub refining, haum rau ladle (LF) ntxiv los yog tsis siv neeg noj tshuab.
Fine Grains / Hmoov:0.1-3mm, los yog cais raws li mesh loj (piv txwv li, 50-200 mesh). Siv rau hauv cov txheej txheem tshwj xeeb, xws li kev txhaj tshuaj, xaim pub mis, lossis kev kho hauv-kho.
Kev tshuaj xyuas ntawm Multidimensional Influence Mechanism ntawm Loj ntawm Deoxidation Efficiency
3.1 Reaction Kinetics: Lub luag haujlwm txiav txim siab ntawm thaj chaw tshwj xeeb
Qhov loj me ncaj qha cuam tshuam rau thaj chaw tshwj xeeb (ntoog thaj tsam ib chav tsev loj) ntawm ferrosilicon. Qhov me me, qhov ntau geometrically qhov tshwj xeeb ntawm thaj chaw nce.
Loj ferrosilicon:
Tom qab ntxiv rau cov hlau molten, cov tshuaj tiv thaiv tsuas yog tshwm sim ntawm qhov chaw, tsim ib qho "unmelted ferrosilicon core." Txoj kev tawg thiab diffusion ntawm silicon nyob rau hauv ntev, ua rau qeeb thiab tsis tiav cov tshuaj tiv thaiv, yooj yim ua rau cov hlau tsis sib xws.
Particle ferrosilicon:
Qhov tseem ceeb ua rau muaj kev cuam tshuam cov tshuaj tiv thaiv, tso cai rau silicon kom yaj sai thiab sib npaug hauv feeb, ua tiav "explosive" deoxidation thiab shortening refining lub sij hawm.
Xaus:
Nyob rau hauv tib qhov sib ntxiv thiab nplawm tej yam kev mob, qhov deoxidation cov tshuaj tiv thaiv ntawm me me -particle ferrosilicon tuaj yeem ua 2-3 zaug sai dua li ntawm cov ferrosilicon loj.
3.2 Element Recovery thiab Hlawv -tawm Tswj
Tus nqi rov qab (tus nqi rov qab) yog qhov ntsuas tseem ceeb rau kev ntsuas cov txiaj ntsig kev lag luam. Silicon hlawv- tawm feem ntau tshwm sim los ntawm ob txoj hauv kev: 1) oxidation rau hauv slag; 2) volatilization nyob rau hauv daim ntawv ntawm chav.
Loj ferrosilicon:
Dissolves maj mam, ntab ntawm lub slag-steel interface rau lub sijhawm ntev, thiab qhov feem ntawm silicon poob los ntawm oxidation los ntawm slag yog nce ntau (hlawv-tawm tus nqi tuaj yeem ncav cuag 8%-12%), uas ua rau rov qab tsis ruaj khov.
Granular ferrosilicon:
Nws sai sai nkag mus rau hauv cov hlau molten thiab yaj, zoo tsis txhob sib cuag oxidation nrog cov slag. Nws cov kev faib tawm tsis sib xws kuj tseem txo qis kev poob ntawm kev sib tsoo los ntawm qhov chaw kub kub. Tag nrho cov txiaj ntsig feem ntau tuaj yeem nce los ntawm 5-8 feem pua cov ntsiab lus (piv txwv li, los ntawm 85% mus rau 90% +).
Hmoov zoo:
Yog hais tias ncaj qha sprinkled, nws yog yooj yim tshem tawm los ntawm pa taws los yog ntab nyob rau hauv lub slag, ua rau ib tug tseem ceeb burning -tawm. Txawm li cas los xij, yog tias pub rau hauv qhov tob ntawm cov hlau molten los ntawm kev pub hlau los yog kev txhaj tshuaj, nws tuaj yeem ua tiav qhov kev tiv thaiv zoo tshaj plaws thiab tawm los (txog 92% lossis ntau dua).
3.3 Inclusion Morphology thiab hlau huv huv
Lub morphology thiab tshem tawm efficiency ntawm cov khoom deoxidation SiO₂ cuam tshuam los ntawm kev siv ntawm cov tshuaj tiv thaiv.
Loj ferrosilicon:
Cov tshuaj tiv thaiv qeeb tau yooj yim tsim cov SiO₂ loj nrog cov pawg uas nyuaj rau ntab, uas ua rau muaj kev puas tsuaj rau cov hlau purification.
Particle / zoo ferrosilicon:
Cov tshuaj tiv thaiv sai thiab tsis sib xws ua rau muaj ntau dua tab sis me dua, sib cais ntau dua SiO₂ suav nrog. Cov kev sib xyaw me me no feem ntau yuav sib tsoo, sib sau ua ke, thiab ntab hauv qab ntawm cov hlau molten, thaum kawg txo cov pa oxygen tag nrho (TO) hauv cov hlau molten los ntawm 15-30%, txhim kho lub neej qaug zog thiab cuam tshuam rau cov hlau.
3.4 Txheej txheem Adaptability thiab Automation
Loj ferrosilicon:
Relies ntawm phau ntawv los yog nyiaj siv ua haujlwm crane pub, ua rau tsis zoo metering raug (kev ua yuam kev mus txog ± 5%), loj batch muaj pes tsawg leeg hloov pauv, thiab tsis ua raws li qhov yuav tsum tau ua ntawm cov khoom siv niaj hnub no.
Particle ferrosilicon:
Ua tau zoo rau qhov tsis siv neeg qhov hnyav thiab vibratory pub mis, ua tiav kilogram- qib lossis txawm gram- qib raug (yuam tsawg dua lossis sib npaug li ± 1%), muab cov kev sib xyaw ua ke tswj kev ruaj ntseg rau smelting siab - qib steel kawg.
Hlau feeding technology:
Uaferrosilicon hmoovrau hauv cored hlau yog tam sim no qhov siab tshaj precision micro{0}} kho tshuab, uas tuaj yeem tswj cov muaj pes tsawg leeg hauv qhov nqaim heev.
Tus Qauv Kev Lag Luam rau Kev Xaiv Granularity - Kev Ntsuam Xyuas Tus Nqi Zoo
| Cov khoom raug nqi | Loj ferrosilicon blocks (10-50mm) | Particle ferrosilicon (1-10mm) | Ferrosilicon hmoov rau hlau pub |
|---|---|---|---|
| Raw Material Purchase Price | Benchmark | Feem ntau 5-10% siab dua | Feem ntau 20-30% siab dua |
| Silicon Yield | Kev ntsuas ntsuas (piv txwv li, 85%) | Nce 5-8% | Nce 8-12% |
| Tus nqi Silicon zoo | Siab | qis | Yuav tsum tau xam raws li tus nqi pub mis |
| Refining Time/Energy Consumption | Siab (Slower teb) | Txo los ntawm 10-15% | Precise tswj, tsawg zog siv tag nrho |
| Kev ruaj ntseg zoo / seem seem | Kev pheej hmoo siab dua | Tsawg heev | Qhov zoo |
| Labor thiab Automation Nqi | Siab | Tsawg | Medium (cov cuab yeej siv peev) |
Xaus:Rau feem ntau niaj hnub steel mills uas siv ladle refining (LF), txawm hais tias chav tsev nqi ntawm ferrosilicon Particle yog me ntsis siab dua, tag nrho cov nqi txuag tau los ntawm kev nce yield, txo zog noj, thiab kev txhim kho zoo tuaj yeem them tus nqi sib txawv li ntawm 3-6 lub hlis, ua rau muaj txiaj ntsig zoo rau kev lag luam mus sij hawm ntev.
Cov lus pom zoo xaiv thiab cov kev coj ua zoo tshaj plaws
Hluav taws xob Arc rauv / Converter Steelmaking txheej txheem:Nruab nrab -sized (10-30mm) blocky ferrosilicon tuaj yeem siv rau kev ua ntej ua ntej deoxidation.
Ladle Refining Rauv (LF):1-10mm granular ferrosilicon tau pom zoo, ntxiv los ntawm kev pub mis tsis siv neeg. Qhov no yog tus qauv kub rau kev ua tau zoo, ruaj khov, thiab kev lag luam deoxidation.
Precise Control ntawm Ultra- Tsawg Carbon Steel thiab Cov Hlau Tshwj Xeeb:Ferrosilicon cored hlau (sau nrog cov hmoov zoo) yog siv los ua kom tiav millimeter -theem fine-tuning ntawm qhov kawg muaj pes tsawg leeg.
Kub Hlau Pretreatment hauv Foundry Kev Lag Luam:0.2-1mm zoo-grained ferrosilicon yog siv rau hauv-flow inoculation, ua kom tiav instantaneous thiab npaum deoxidation thiab inoculation.
Ferrosilicon loj yog deb tshaj qhov yooj yim lub cev tsis; Nws yog cov txheej txheem tseem ceeb sib txawv uas txuas cov tshuaj tiv thaiv metallurgical kinetics, ntau lawm efficiency, thiab kawg steel zoo. Kev hloov pauv los ntawm cov blocks loj mus rau granules sawv cev rau qhov pom ntawm qhov pom ntawm kev lag luam hlau hloov los ntawm kev siv dav mus rau kev tsim khoom hnyav, thiab los ntawm kev paub dhau los - tsav mus rau cov ntaub ntawv - cov txheej txheem tsav. Kev xaiv qhov loj me me yog qhov tseem ceeb xaiv txoj kev tsim khoom muaj txiaj ntsig, kev lag luam, thiab txhim khu kev qha.
Rau cov tuam txhab cog lus los txhim kho kev sib tw thiab tsim cov khoom zoo siab -cov hlau zoo, koom tes nrog ferrosilicon tus neeg muag khoom muaj peev xwm muab ntau yam kev qhia tshwj xeeb, siab purity, thiab ruaj khov me me faib, thiab sib koom ua cov txheej txheem sim rau qhov loj me, yog qhov kev nqis peev zoo heev.
Txog Peb
[AON Metals] boasts tshaj 20 xyoo ntawm kev txawj ntse hauv ferroalloys. Peb muab ntau yam ntawm cov khoom ferrosilicon, los ntawm blocky mus rau nplua - cov ntawv sau, thiab muab cov neeg siv khoom nrog kev txhawb nqa rau kev xaiv loj thiab kev ua kom zoo raws li cov kab ntau lawm, qib steel, thiab cov nqi phiaj. Peb nkag siab tias cov khoom lag luam zoo tshaj yuav tsum tau ua ke nrog kev paub txog kev ua haujlwm los tsim tus nqi siab tshaj plaws rau peb cov neeg siv khoom.
