Calcium Silicon Alloy CaSi|Deoxidizer & Desulfurizer
Calcium Silicon AlloyCaSi
Tus hwm zoo deoxidizer thiab desulfurizer rau niaj hnub steelmaking. Dual-kev ua metallurgy nrog silicon- coj deoxidation thiab calcium-tsav kev tswj kev suav nrog.
Teb ceev: Calcium Silicon Alloy yog dab tsi?
Calcium silicon alloy(tseem hu ua CaSi alloy lossis silicon calcium alloy) yog ferroalloy feem ntau ntawm calcium, silicon, thiab hlau. Nws yog dav siv nyob rau hauv steelmaking raws li ib tugComposite deoxidizer thiab desulfurizer. Standard qib xws liCa31 Si 60, Ca28 Si 60, thiabCa24 Si 60xa ob qho tib si silicon thiab calcium ib txhij rau molten steel, ua rau thawj deoxidation, sib sib zog nqus desulfurization, thiab transformation ntawm cov khoom alumina inclusions rau hauv cov kua calcium aluminates uas txhim kho castability.
Product Overview & Chemical Composition
Calcium silicon alloy yog tsim los ntawm kev txo silica thiab txiv qaub nyob rau hauv submerged -arc furnaces. Lub resulting alloy yog ib tug grey, nkig khoom nrog ib tug metallic luster, feem ntau muab nyob rau hauv daim ntawv ntawm ib tug pob rau ladle ntxiv los yog nyob rau hauv hmoov daim ntawv rau cored hlau filling thiab txhaj cov txheej txheem.
Peb pab neeg ua haujlwm muab cov calcium silicon alloy hauv peb qib thawj tsim los ua kom sib txawv steelmaking yuav tsum tau ua. Txhua qib tswj xyuas cov txheej txheem nruj kom rov ua tau raws li qhov xav tau thiab hloov pauv kev suav nrog.
| Qib | Ca (%) | Si (%) | C (max) | P (max) | S (max) | Al (max) |
|---|---|---|---|---|---|---|
| Ca31 Si 60 | Ntau dua lossis sib npaug li 31 | 55-66 | 0.8% | 0.04% | 0.06% | 2.5% |
| Ca28 Si 60 | Ntau dua lossis sib npaug li 28 | 55-65 | 0.8% | 0.04% | 0.06% | 2.5% |
| Ca24 Si 60 | Ntau dua lossis sib npaug li 24 | 55-65 | 0.8% | 0.04% | 0.06% | 2.4% |
Txuj siv: YB / T 5051-2016 (Tuam Tshoj ferroalloy kev lag luam tus qauv rau calcium silicon alloy). Lwm yam specifications muaj nyob rau hauv kev thov.
Deoxidation Mechanism: Cas CaSi Ua Haujlwm hauv Molten Steel
Kev ua tau zoo ntawm calcium silicon alloy stems los ntawm kev ua kom zoo ntawm cov khoom siv hlau ntawm nws ob lub ntsiab lus. Silicon thiab calcium ua nyob rau hauv ib ntus kom tshem tawm cov pa oxygen thiab hloov kho tsis yog -cov khoom siv hlau.
Theem 1: Silicon-Led Primary Deoxidation
Thaum twgcalcium silicon alloyyog ntxiv rau cov kua hlau, cov khoom siv silicon reacts ua ntej nrog yaj oxygen. Silicon muaj kev sib raug zoo rau cov pa oxygen thiab yooj yim tsim silica (SiO₂) raws li cov tshuaj tiv thaiv [Si] + 2[O] → (SiO₂). Cov kauj ruam tseem ceeb ntawm deoxidation no sai txo cov ntsiab lus oxygen yaj hauv cov yaj, txo qis cov pa oxygen thiab tsim kom muaj txiaj ntsig zoo rau cov xwm txheej kub ntxhov rau cov tshuaj calcium tom ntej.
Cov khoom silicon deoxidation, SiO₂, feem ntau yog kua los yog ib nrab yaj hauv slag ntawm steelmaking kub. Vim tias silicon muaj nyob rau hauv ntau ntau hauv CaSi alloy, qhov pib deoxidation ua haujlwm zoo yam tsis muaj kev sib cais ferrosilicon ntxiv.
Theem 2: Calcium-Driven Deep Deoxidation & Desulfurization
Calcium muaj ib qho kev sib raug zoo rau oxygen dua li silicon. Thaum cov silicon tau txo qis cov pa oxygen ntau, calcium koom nrog hauv kev sib sib zog nqus deoxidation, ntxiv cov pa oxygen mus rau qis heev. Cov tshuaj tiv thaiv [Ca] + [O] → (CaO) pib nrog lub zog tsis zoo Gibbs dawb, ua calcium uas yog ib qho ntawm cov deoxidizers muaj zog tshaj plaws muaj nyob rau hauv daim ntawv ferroalloy.
Tshaj li deoxidation, calcium kuj reacts nrog yaj sulfur los tsim calcium sulfide (CaS), uas partitions rau hauv slag theem. Ua ke nrog cov txheej txheem slag tsim nyog, cov txheej txheem no tuaj yeem ua tiav cov ntsiab lus sulfur hauv qab 0.001% hauv cov khoom hlau kawg. Lub dual deoxidation-desulfurization muaj peev xwm txawvCaSi alloylos ntawm ib qho -element deoxidizers.
Inclusion Modification: Qhov Zoo Tshaj Plaws
Tej zaum qhov tseem ceeb tshaj plaws metallurgical muaj nuj nqi ntawm calcium hauv steelmaking yog suav nrog kev hloov kho. Hauv aluminium-tua steels, yaj aluminium reacts nrog oxygen los tsim cov khoom alumina (Al₂O₃) suav nrog cov ntsiab lus melting ntau tshaj 2050℃. Cov pawg tawv no sib sau ua ke nyob rau hauv tundish nozzle thaum lub sij hawm nruam casting, ua rau blockages thiab defects nto.
Thaum calcium los ntawm CaSi alloy reacts nrog cov alumina pawg, nws hloov mus rau hauv cov kua calcium aluminate tebchaw xws li 12CaO·7Al₂O₃ (mayenite), nrog cov ntsiab lus melting hauv qab 1400 degree. Cov kua dej suav nrog no yog kheej kheej, deform yooj yim thaum kub dov, thiab tsis txhob txhaws nozzles. Qhov tshwm sim yog cov hlau huv huv thiab txhim khu kev qha txuas ntxiv.
CaSi vs. Lwm yam Deoxidizers: Ib qho kev sib piv
Xaiv qhov zoo deoxidizer nyob ntawm qib steel, txheej txheem txoj kev, thiab lub hom phiaj zoo. Cov lus hauv qab no piv cov calcium silicon alloy tiv thaiv ferrosilicon (FeSi) thiab ntshiab txhuas.
| Khoom | CaSi alloy | Ferrosilicon (FeSi75) | Ntshiab Aluminium |
|---|---|---|---|
| Thawj Deoxidation Strength | Muaj zog | Muaj zog | Muaj zog heev |
| Deep Desulfurization | Yog lawm | Tsis muaj | Tsis muaj |
| Inclusion Modification (Al₂O₃) | Yog lawm | Tsis muaj | Tsim Al₂O₃ |
| Nozzle Clogging Tiv Thaiv | Tiv thaiv | Nruab nrab | Ua Tau |
| Tus nqi ib tuj hlau | Nruab nrab | Tsawg | Nruab nrab |
| Daim ntawv thov complex | Nruab nrab | Yooj yim | Nruab nrab |
| Zoo tshaj rau | Cov hlau huv, IF / ULC | Qib dav dav | Al-tua qib |
Rau steel mills ua tau siab -cov khoom zoo tiaj tus, cov raj xa dej, lossis cov qib tsheb, qhov suav nrog- cov txiaj ntsig hloov kho ntawmcalcium silicon alloyfeem ntau tshaj tus nqi nce ntxiv piv rau ferrosilicon ib leeg.
Daim ntawv thov los ntawm Steel Qib
Cov qib steel sib txawv tso qhov kev xav tau sib txawv ntawm deoxidation thiab kev tswj hwm kev suav nrog. Peb pab pawg kws tshaj lij pom zoo CaSi qib thiab kev coj ua ntxiv raws li daim ntawv thov phiaj xwm.
- IF / ULC hlau
Interstitial -Free & Ultra- Cov Carbon Tsawg
Cov qib no xav tau cov pa oxygen tsawg heev thiab tswj kev suav nrog morphology.Ca31 Si 60feem ntau yog ntxiv tom qab txhuas deoxidation los hloov kho alumina inclusions rau hauv cov kua calcium aluminates, kom ntseeg tau qhov tsis xws luag -dawb txias-rolled ntawv rau automotive exposed panels.
- Pipeline Hlau
API Kab Yeeb & Sour -Service Qib
Pipeline steels xav tau cov sulfur tsawg heev rau hydrogen-induced cracking resistance.CaSi alloymuab kev sib xyaw desulfurization thiab suav nrog spheroidization. Kev xyaum ntxiv 0.5-2.0 kg ib tonne nyob ntawm qhov pib ntawm leej faj thiab slag tej yam kev mob.
- Bearing Steel
Bearing & Iav Steels
Tsis yog-cov khoom siv hlau yog lub hauv paus pib ntawm kev qaug zog tsis ua haujlwm hauv cov kabmob. Calcium kho transforms teeb meem alumina stringers rau benign spherical calcium aluminates, ho txhim kho lub neej qaug zog thiab tiv tauj durability.
- Stainless hlau
Austenitic & Duplex Stainless Qib
Hauv kev tsim cov hlau tsis muaj steel, calcium silicon ua haujlwm ua deoxidizer thiab suav nrog kev hloov pauv thaum AOD lossis ladle refining. Qhov qis- carbon specification ntawm cov qauv CaSi qib (C Tsawg dua lossis sib npaug li 0.8%) txo qis cov pa roj carbon monoxide thaum kho.
- Lub Nkoj Siab
Boiler & Siab Vessel Steels
Cov qib no yuav tsum tau tswj cov sulfur thiab cov ntsiab lus suav nrog rau weldability thiab toughness. Calcium silicon kev kho mob nyob rau hauv lub ladle furnace ua tiav qhov yuav tsum tau huv huv theem thaum tswj cov txheej txheem stability.
- Rail Hlau
Hnyav-Haul & High-Speed Rail
Rail steels tau txais txiaj ntsig los ntawm kev txo qis oxide thiab sulfide inclusions los tiv thaiv kev qaug zog tawg hauv qab lub log tsheb thauj khoom. Calcium kev kho mob txhim kho suav nrog deformability thiab txo qhov chaw tawg hauv qhov chaw pib.
Standard Size, Ntim & Logistics
Calcium silicon alloy yog nkag rau hauv cov ntaub ntawv haum rau hluav taws xob rauv thiab ladle furnace ntxiv. Raws li qhov loj me kom ntseeg tau tias qhov kev sib tsoo thiab rov qab los.
Loj Loj
Txheem pob loj muaj xws li 10-50 hli thiab 50-100 hli. Fine fractions (0–3 mm, 1–3 mm, 3–10 mm) yog muaj rau cov ntawv thov hmoov thiab cored hlau filling.
Ntim Ntim
Kev ntim khoom tseem ceeb siv 1000 kg bulk hnab nrog rau sab hauv dej thaiv. Cov nruas me me ntawm 20-25 kg yog muaj rau kev sim ntau thiab siv cov khoom siv tshwj xeeb.
Kev tiv thaiv dej noo
Calcium silicon yog hygroscopic. Tag nrho cov kev xa tawm xa tawm siv cov hnab ntim hauv lub hnab ntim, ncab- qhwv pallets, thiab cov khoom siv desiccant los tiv thaiv oxidation thaum caij tsheb thauj mus los.
Cov ntaub ntawv zoo
Txhua batch yog nrog los ntawm ib daim ntawv pov thawj zeb xeem uas qhia cov tshuaj muaj pes tsawg leeg los ntawm spectrometry, loj tis, thiab ya raws cov ntsiab lus ntawm kev thov.
Cov lus nug nquag
Dab tsi yog calcium silicon alloy siv rau hauv steelmaking?
Calcium silicon alloy ua haujlwm ua cov khoom sib xyaw deoxidizer thiab desulfurizer hauv steelmaking. Cov khoom siv silicon ua thawj deoxidation los ntawm reacting nrog yaj oxygen, thaum calcium muab sib sib zog nqus deoxidation thiab hloov cov khoom alumina inclusions rau hauv cov kua calcium aluminates, txhim kho castability thiab txo nozzle clogging thaum nruam casting.
Calcium silicon piv rau ferrosilicon li deoxidizer li cas?
Ferrosilicon muab kev lag luam deoxidation tab sis tsis tuaj yeem hloov kho kev suav nrog lossis desulfurize zoo. Calcium silicon alloy muab ob qho tib si muaj zog deoxidation thiab suav nrog kev hloov pauv hauv ib qho ntxiv, ua rau nws zoo dua rau kev huv huv - qib steel qhov twg alumina tswj yog qhov tseem ceeb.
Dab tsi yog cov txheej txheem ntawm calcium silicon alloy?
Cov qib feem ntau yog Ca31Si60 (Ca Ntau dua lossis sib npaug li 31%, Si 55-66%), Ca28Si60 (Ca Ntau dua lossis sib npaug li 28%, Si 55-65%), thiab Ca24Si60 (Ca Ntau dua lossis sib npaug li 24%, Si 55-65%). Tag nrho cov txheej txheem tswj cov pa roj carbon tsawg dua lossis sib npaug li 0.8%, phosphorus Tsawg dua lossis sib npaug li 0.04%, sulfur Tsawg dua lossis sib npaug rau 0.06%, thiab aluminium Tsawg dua lossis sib npaug li 2.5%.
Vim li cas calcium zoo ntawm kev tshem cov sulfur los ntawm molten steel?
Calcium muaj zog affinity rau sulfur ntau dua li lwm cov ntsiab lus hauv steel. Thaum ntxiv rau yaj, calcium reacts nrog yaj sulfur los ua calcium sulfide, uas muab faib rau hauv slag. Ua ke nrog cov txheej txheem slag kom zoo, cov txheej txheem no tuaj yeem ua tiav cov qib sulfur hauv qab 0.001%.
Cov qib steel twg yog calcium silicon alloy feem ntau siv?
Calcium silicon yog dav siv nyob rau hauv aluminium-tua steels, interstitial-dawb (IF) steels, ultra- low carbon (ULC) steels, pipeline steels, siab hlab ntsha steels, bearing steels, thiab stainless steels qhov twg inclusion morphology tswj thiab tsis muaj sulfur yuav tsum tau.
Dab tsi yog qhov rov qab zoo ntawm calcium thaum ntxiv CaSi alloy rau lub ladle?
Thaum calcium silicon alloy ntxiv ncaj qha rau lub ladle li cov khoom siv, calcium rov qab feem ntau yog li ntawm 15% mus rau 25%. Qhov rov qab qis dua yog vim muaj calcium uas tsis tshua muaj ntom ntom thiab siab vapor siab ntawm steelmaking kub. Kev siv cored hlau txhaj tuaj yeem txhim kho kev rov qab mus rau 10-25% lossis siab dua nrog cov ntsuas tsis zoo.
Qhov ntau thiab tsawg thiab cov kev xaiv ntim khoom muaj rau calcium silicon alloy?
Calcium silicon alloy feem ntau yog muab rau hauv daim ntawv nrog qhov ntau thiab tsawg suav nrog 10-50 hli thiab 50-100 hli. Txheem ntim siv 1000 kg tej hnab los yog 20-25 kg steel nruas ntawm pallets. Moisture-resistant wrapping thiab seaworthy packing yog muaj rau kev xa khoom xa tuaj.
Thov ib daim ntawv rau Calcium Silicon Alloy
Peb pab neeg ua haujlwm tuaj yeem pom zoo rau qib CaSi zoo, qhov loj me, thiab kev xyaum ntxiv rau koj cov txheej txheem steelmaking. Xa koj cov lus qhia tshwj xeeb thiab ntim txhua xyoo rau peb rau kev sib tw.
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