Calcium silicon hauv ntsuab steelmaking? 

Koj hnov ntsuab steelmaking thiab tam sim ntawd xav tias hydrogen, hluav taws xob arc rauv, seem rov siv dua. Txoj cai? Qhov ntawd yog cov duab loj. Tab sis nyob rau hauv lub ladle, nyob rau hauv tweaking ntawm lub kawg yaj chemistry, muaj ib tug nyob ntsiag to, feem ntau to taub yuam kev workhorse: calcium silicon. Nws tsis yog glamorous. Nws yog deoxidizer, desulfurizer. Tab sis nws lub luag haujlwm hauv kev hloov pauv ntsuab yog ntau ntxiv txog kev ua kom muaj txiaj ntsig thiab ua tau zoo hauv cov txheej txheem tshiab, tsawg dua cov pa roj carbon ntau dua li kev ua haujlwm ntawm nws tus kheej. Lub misconception yog kho nws tsuas yog lwm yam alloy ntxiv. Hauv kev muaj tiag, nws qhov kev ua tau zoo txiav txim siab seb koj cov hlau huv li cas, koj lub caster khiav zoo npaum li cas, thiab thaum kawg, ntau npaum li cas koj tau txais los ntawm koj cov nqi kim, cov pa roj carbon tsawg lossis cov nqi seem. Tau txais nws tsis ncaj ncees lawm, thiab koj qhov kev xav ntsuab ntsuab tau txhaws nrog cov kab thaiv nozzle thiab tsis muaj kev suav nrog.

Core Mechanism: Ntau dua li Deoxidation xwb

Txhua tus paub CaSi yog rau deoxidation. Koj muab pov rau hauv, nws grabs oxygen thiab sulfur, daim ntawv floatable slag. Phau ntawv. Tab sis qhov nuance-qhov koj tsuas yog kawm thaum koj tab tom saib ntawm daim ntawv qhia txog kev suav nrog-yog hais txog hom kev suav nrog nws tsim. Kev kho calcium ntshiab tuaj yeem ua kom yuam kev; nws yog volatile, nws yield yog inconsistent. Calcium silicon, nrog cov silicon ua tus cab kuj thiab ua kom cov tshuaj tiv thaiv, muab kev tso tawm ntau dua rau koj. Lub hom phiaj tsis yog tsuas yog tshem tawm O thiab S, nws yog kom morph ib qho ntxiv alumina (Al2O3) stringers rau hauv cov kua calcium aluminates. Cov globular inclusions yog mos, lawv tsis abrade koj submerged nkag nozzle, lawv tsis ua rau tawg nyob rau hauv high-lub zog nyias strip. Qhov ntawd yog qhov twg qhov txuas ntsuab pib: smooth casting txhais tau tias tsawg dua breakouts, tsawg seem, tsawg zog nkim re-melting off-cuts.

Kuv nco qab qhov kev sim ntawm lub zeb txav mus rau qhov sib piv ntau dua hauv lawv cov EAF - ib qho kev txav ntsuab. Ntau cov seem txhais tau tias ntau cov khoom tramp, ntau qhov sib txawv residuals. Lawv cov kev xyaum uas twb muaj lawm nrog ib qho yooj yim deoxidizer ua rau txaus ntshai clogging ntawm tundish. Peb hloov mus rau ib qib tshwj xeeb ntawm CaSi nrog qhov sib zog Ca / Si piv thiab tswj cov khoom me me (xav tias 10-30mm, tsis yog hmoov). Cov nyhuv tam sim ntawd tsis yog cov hlau huv huv los ntawm spec, nws yog tus thawj coj ceeb toom tias lawv tau khiav qhov sib lawv li peb lub cua sov ntev dua yam tsis muaj qhov hloov pauv. Qhov ntawd yog tangible. Qhov ntawd yog tsawg downtime, tsawg refractory pov tseg, ntau tons ib lub hwj chim-on teev. Tus nqi hlau alloy tau siab dua, tab sis kev txuag nyiaj ua haujlwm tau ua rau nws tawm hauv dej.

Hom kev ua tsis tiav ntawm no yog xav tias txhua CaSi yog tib yam. Ib tus neeg muag khoom zoo li Sab hauv Mongolia Xinxin Silicon Kev Lag Luam Co., Ltd. (koj tuaj yeem tshawb xyuas lawv cov khoom lag luam ntawm https://www.xinxinsilicon.com) yuav teev cov specs zoo li Ca28-Si60 lossis Ca30-Si58. Qhov ob peb feem pua ​​​​qhov sib txawv ntawm cov ntsiab lus calcium, cov kab hauv qab ntawm txhuas, barium, lossis txawm tias lub ntiaj teb tsis tshua muaj lawv tuaj yeem sib xyaw - nws tseem ceeb heev. Kev siv cov qib qis-calcium rau txoj haujlwm sib sib zog nqus desulfurization yog qhov nkim nyiaj thiab sijhawm. Koj mus ntxiv ntxiv, uas ua rau kom cov silicon tuaj tos, muaj feem cuam tshuam koj qhov kawg chemistry. Nws yog ib qho kev sib npaug uas tau kawm los ntawm kev ua yuam kev.

Cov kev sib tw hauv kev siv

Yog li koj tau xaiv qib zoo. Tam sim no, ua li cas koj tau txais nws mus rau hauv lub yaj? Hlau txhaj yog tus qauv kub rau kev tawm los thiab rov tsim dua tshiab. Koj muaj peev xwm precisely ntsuas nws mus rau hauv lub ladle ntawm txoj cai qhov tob. Tab sis hlau feeders yog peev, thiab cov cored hlau nws tus kheej yog tus nqi ntxiv. Qee lub khw me, tshwj xeeb tshaj yog nyob rau hauv cov lag luam tawm tshiab, tseem siv cov hnab ntim ntxiv - pov lub hnab ntim rau hauv lub ladle thaum tapping. Qhov teeb meem? Koj tau txais qhov zoo kawg nkaus, khib nyiab tawm ntawm calcium vapor, dispersion tsis sib haum, thiab cov txiaj ntsig uas tuaj yeem ua viav vias ntawm 15% mus rau 40%. Kuv tau pom cua sov qhov twg feem ntau ntawm cov calcium uas tsuas yog hlawv tawm mus rau hauv cov pa hluav taws xob rho tawm. Tsis ntsuab, tsis yig.

Lub sijhawm yog lwm qhov kev xav ntawm lub siab. Ntxiv ntxov dhau, thaum cov kev ua pa oxygen tseem siab, thiab cov calcium tau noj nyob rau hauv qhov hnyav slag-hlau cov tshuaj tiv thaiv. Ntxiv lig dhau lawm, thaum kub poob qis, thiab cov kev suav tsis muaj sijhawm los ntab tawm. Qhov chaw qab zib yog feem ntau thaum lub sij hawm maj mam argon do, tom qab thawj zaug deoxidation tau khob cov pa oxygen tab sis ua ntej cov hlau mus rau lub caster. Koj tab tom ntxuav lub yaj. Tau txais qhov tsis ncaj ncees lawm txhais tau tias cov kua dej suav nrog koj ua haujlwm los tsim tsis cais; lawv nkag mus rau hauv lub solidifying strand, ua defects.

Tom qab ntawd muaj qhov sib xws ntawm cov khoom siv raw. Ib pawg ntawm CaSi nrog cov dej noo siab lossis qhov loj me tuaj yeem ua rau muaj kev puas tsuaj. Cov dej noo ua rau hydrogen khaws, porosity. Off-spec loj (ntau npaum li cas nplua) ua rau kom tawg sai sai thiab tsis tswj cov tshuaj tiv thaiv. Peb ib zaug tau xa khoom xa tuaj qhov twg lub hnab ntim khoom tsis zoo, thiab cov hlau tsis tshua muaj oxidized thaum caij tsheb thauj mus los. Cov qoob loo tau poob qis, thiab qhov kev hloov pauv ntawm leej faj nyob rau hauv lub tshav kub tom ntej yog npau suav phem. Nws underscores yog vim li cas koom tes nrog ib tug tsim khoom nrog ib tug ruaj system tseem ceeb. Xinxin Silicon tau hais txog kev tswj hwm zoo tshaj plaws thiab kev ruaj ntseg zoo thiab ua tiav cov khoom siv ntsuas ntsuas tsis yog kev lag luam xwb - nws yog qhov tiv thaiv cov mob taub hau no. Lawv cov khoom kab rau calcium silicon, cored hlau, thiab nodulizers qhia tias lawv nkag siab txog daim ntawv thov hauv qab, tsis yog qhov smelting.

Green Synergy thiab Material Efficiency

Muaj tseeb ntsuab steelmaking yog hais txog ib ncig lub siab. Cas CaSi haum? Ua ntej, los ntawm kev siv cov khoom siv hluav taws xob ntau dua. Cov khib nyiab yog qhov kawg ntsuab hlau qhov chaw, tab sis nws qias neeg. Kev kho calcium zoo yog cov tshuaj ntxuav tes uas ua rau cov khoom seem siv tau rau cov khoom qib siab. Thib ob, hauv cov txheej txheem xws li hydrogen-raws li kev txo qis (DRI / HBI melting), cov hlau yog ntshiab heev tab sis tsawg hauv silicon. Cov silicon hauv CaSi tuaj yeem dhau los ua cov khoom siv sib xyaw ua ke ntawm no, tsis yog tus nqa khoom xwb, pab ntaus lub hom phiaj silicon specs yam tsis muaj FeSi ntxiv. Nws yog ob-noog-ib-pob zeb scenario.

Kuj tseem muaj lub ntsej muag. Kev xyaum zoo CaSi txo qhov xav tau ntawm cov kua qaub ntau ntxiv rau desulfurization. Tsawg slag ntim txhais tau hais tias tsawg zog kom sov nws, tsawg flux noj, tsawg slag tuav downstream. Nws yog ib qho me me hauv tag nrho cov nroj tsuag loj, tab sis cov levers me me ntxiv. Kuv nco qab txog qhov project aiming kom txo cov slag tiam ib tuj hlau. Optimizing cov calcium silicon Ntxiv cov ntsiab lus thiab tus nqi, ua ke nrog kev xyaum siv hluavtaws, txiav ladle slag los ntawm ze li ntawm 8%. Qhov ntawd tsis tshua muaj pov tseg rau kev pov tseg los yog txheej txheem.

Daim ntawv thov nodulizing rau ductile hlau castings, uas Xinxin teev, yog ib tug parallel ntug tab sis nrog tib lub ntsiab cai. Siv CaSi-raws li nodulizers (nrog magnesium) nyob rau hauv ib tug foundry yog lwm hom ntawm cov ntaub ntawv efficiency-transforming yooj yim hlau rau hauv ib tug high-kev ua tau zoo, feem ntau sib zog-huv khoom, uas yog ib tug sustainability yeej nyob rau hauv automotive los yog infrastructure. Cov kws tshaj lij hauv kev tsim cov khoom zoo sib xws, siab-purity alloys rau daim ntawv thov xav tau no txhais ncaj qha rau kev ntseeg siab xav tau hauv steelmaking.

Saib tom ntej: Tsis yog Nyiaj Bullet, Tab sis qhov tseem ceeb Enabler

Puas yuav calcium silicon nyob rau hauv xovxwm tshaj tawm rau tom ntej no xoom-carbon steel cog? Tsis zoo li. Tab sis nws puas yuav nyob rau hauv cov nroj tsuag cov txheej txheem kev khiav hauj lwm? kiag li. Raws li steelmaking txoj kev sib txawv - ntau EAF, ntau DRI, ntau hybrid txheej txheem - qhov kev thov kom meej, txhim khu kev qha, thiab ua tau zoo theem nrab metallurgy yuav tsuas loj hlob. Calcium silicon zaum hauv nruab nrab ntawm qhov ntawd.

Cov kev txhim kho yav tom ntej kuv tab tom saib yog nyob rau hauv cov xov hlau coated lossis cov hlau sib xyaw ua ke uas ntxiv txhim kho cov txiaj ntsig thiab txo cov pa taws. Tej zaum alloys tailored rau cov khoom seem sib tov. Cov chemistry yooj yim yuav tsis hloov, tab sis kev xa khoom thiab kev sib xws yuav tau ntse dua. Cov neeg tsim khoom lag luam uas nqis peev hauv qhov sib xws, xws li cov kev sib xyaw ua ke thiab kev sim kab, yuav yog cov mills cia siab rau.

Yog li, txhawm rau qhwv qhov kev sib tw no: yog tias koj tab tom npaj tawm lub tswv yim ntsuab steelmaking, tsis txhob saib ntawm lub zog thiab lub reactor. Saib ntawm lub cuab yeej uas ua rau cov khoom kawg siv tau. Calcium silicon yog ib tug hnav, trusty wrench nyob rau hauv lub thawv ntawd. Nws tsis zoo siab kom txog thaum koj xav tau, thiab tom qab ntawd nws qhov zoo txiav txim siab yog tias koj cov txheej txheem ntsuab zoo nkauj ua tau muag muag, cov hlau zoo. Nws yog lub unsung enabler, thiab nws lub luag hauj lwm tsuas yog tau txais tseem ceeb tshaj li qhov kev lag luam cleans li nws ua.