Xov xwm

Ib tug loj tus naj npawb ntawm industrial gases xws li oxygen, nitrogen thiab argon yog siv nyob rau hauv lub smelting txheej txheem ntawm hlau thiab hlau qhauj.Oxygen feem ntau yog siv rau hauv qhov cub tawg, melting txo smelting rauv, converter, hluav taws xob rauv smelting;Nitrogen feem ntau yog siv rau hauv qhov cub sealing, tiv thaiv roj, steelmaking thiab refining, slag splashing nyob rau hauv converter los tiv thaiv lub cub tawg, kev ruaj ntseg roj, tshav kub hloov nruab nrab thiab system purging, thiab lwm yam Argon roj yog tsuas yog siv nyob rau hauv steelmaking thiab refining.Txhawm rau ua kom tau raws li qhov yuav tsum tau ua thiab ua kom muaj kev nyab xeeb thiab ruaj khov ntawm kev tsim khoom, cov hlau loj loj tau nruab nrog cov chaw nres tsheb tshwj xeeb thiab cov pa oxygen, nitrogen thiab argon fais fab yeeb nkab network system.

Cov tuam txhab loj-cov txheej txheem steel tam sim no tau nruab nrog cov txheej txheem sib xws: coke qhov cub, sintering, blast furnace steelmaking, converter hluav taws xob rauv steelmaking, dov txheej txheem, thiab lwm yam. Vim yog qhov tseem ceeb ntawm kev tiv thaiv ib puag ncig thiab yooj yim ntawm cov txheej txheem ntws, cov hlau thoob ntiaj teb. thiab kev lag luam steel tau tsim cov txheej txheem luv luv ua ntej hlau nyob rau niaj hnub no - melting txo cov hlau ua, uas ncaj qha txo cov hlau ore raw cov ntaub ntawv mus rau hauv molten hlau nyob rau hauv ib tug smelting rauv.

Muaj qhov sib txawv loj hauv cov khoom siv roj uas yuav tsum tau ua los ntawm ob txoj kev sib txawv smelting.Cov pa oxygen xav tau los ntawm cov pa smelting blast furnace suav rau 28% ntawm tag nrho cov pa oxygen xav tau ntawm cov nroj tsuag steel, thiab cov pa oxygen xav tau los ntawm steelmaking account rau 40% ntawm tag nrho cov pa xav tau ntawm cov nroj tsuag steel.Txawm li cas los xij, cov txheej txheem smelt-txo (COREX) yuav tsum muaj 78% ntawm tag nrho cov pa oxygen xav tau rau kev tsim hlau thiab 13% ntawm tag nrho cov pa oxygen xav tau rau kev ua hlau.

Ob txheej txheem saum toj no, tshwj xeeb tshaj yog cov txheej txheem melting txo cov hlau ua, tau nrov hauv Suav teb.

Steel mill gas yuav tsum:

Lub luag haujlwm tseem ceeb ntawm cov pa oxygen hauv qhov cub tawg smelting yog los xyuas kom meej qhov kub thiab txias hauv qhov cub, tsis yog ncaj qha koom rau hauv cov tshuaj tiv thaiv smelting.Oxygen yog sib xyaw rau hauv qhov cub tawg thiab sib xyaw ua pa oxygen nplua nuj rau hauv qhov cub tawg.Cov pa oxygen enrichment efficiency ntawm lub moj tej tawg cua tau npaj nyob rau hauv cov txheej txheem dhau los yog feem ntau qis dua 3%.Nrog rau kev txhim kho ntawm cov txheej txheem blasting rauv, thiaj li yuav txuag tau coke, tom qab siv cov txheej txheem kev txhaj tshuaj loj, thiab ua kom tau raws li qhov yuav tsum tau ua ntawm cov khoom siv hluav taws xob tawg los txhawb cov khoom tsim tawm, cov pa oxygen enrichment tus nqi ntawm cov blast cua yog nce mus rau 5. ∽6%, thiab kev noj ib leeg ntawm cov pa yog mus txog 60Nm3 / T hlau.

Vim tias cov pa oxygen sib xyaw ntawm lub qhov cub tawg yog cov pa uas muaj pa oxygen, qhov purity ntawm oxygen tuaj yeem qis.

Cov pa oxygen hauv cov txheej txheem melting txo steelmaking yuav tsum tau koom nrog hauv cov tshuaj tiv thaiv smelting, thiab kev siv cov pa oxygen ncaj qha rau cov hlau ntau lawm.Kev siv cov pa oxygen hauv lub qhov cub txo qis yog 528Nm3 / t hlau, uas yog 10 npaug ntawm cov pa oxygen noj hauv cov txheej txheem blast furnace.Qhov tsawg kawg nkaus cov pa oxygen uas yuav tsum tau muaj los tswj kev tsim khoom hauv lub qhov cub txo qis yog 42% ntawm cov khoom lag luam ib txwm muaj.

Cov pa purity yuav tsum tau los ntawm lub melting txo qhov cub yog ntau tshaj 95%, cov pa oxygen siab yog 0.8∽ 1.0MPa, lub siab fluctuation ntau yam yog tswj ntawm 0.8MPa ± 5%, thiab cov pa oxygen yuav tsum tau xyuas kom muaj ib tug tej yam nqi ntawm nruam. muab khoom rau ib lub sijhawm.Piv txwv li, rau Corex-3000 rauv, nws yog ib qho tsim nyog yuav tau xav txog cov kua oxygen cia ntawm 550T.

Cov txheej txheem steelmaking txawv ntawm qhov cub tawg thiab melting txo qhov cub smelting txoj kev.Oxygen siv hauv converter steelmaking yog sib quas ntus, thiab cov pa yog loaded thaum tshuab pa oxygen, thiab cov pa oxygen koom nrog cov tshuaj tiv thaiv smelting.Muaj kev sib raug zoo ncaj qha ntawm tus nqi ntawm cov pa oxygen xav tau thiab cov khoom siv hlau ua.

Txhawm rau txhim kho lub neej kev pab cuam ntawm lub converter, nitrogen slag splashing tshuab yog feem ntau saws nyob rau hauv steel mills tam sim no.Nitrogen yog nyob rau hauv kev siv tsis tu ncua, thiab lub load yog loj thaum siv, thiab qhov yuav tsum tau nitrogen siab yog siab tshaj 1.4MPa.

Argon yog xav tau rau steelmaking thiab refining.Nrog rau kev txhim kho steel ntau yam, cov kev xav tau rau kev ua kom zoo dua qub, thiab cov nyiaj siv argon yog maj mam nce.

Kev siv nitrogen ntawm lub tshuab txias dov yuav tsum ncav cuag 50∽67Nm3 / t ib chav tsev.Nrog rau qhov sib ntxiv ntawm qhov txias dov zeb nyob rau hauv steel dov cheeb tsam, cov nitrogen noj ntawm steel zeb nce sai heev.

Hluav taws xob rauv hlau ua feem ntau yog siv arc cua sov, thiab qhov kub thiab txias hauv thaj tsam arc yog siab li 4000 ℃.Smelting txheej txheem feem ntau muab faib ua lub sij hawm melting, lub sij hawm oxidation thiab txo lub sij hawm, nyob rau hauv lub cub tawg yuav tsis tsuas ua rau oxidation cua, tab sis kuj yuav ua rau kom txo tau huab cua, yog li qhov efficiency ntawm dephosphorization, desulfurization yog heev.Lub tshuab hluav taws xob nruab nrab yog ib hom kev siv hluav taws xob ntau zaus 50 hz hloov tam sim no rau hauv nruab nrab zaus (ntau tshaj 300 hz - 1000 hz) fais fab mov, peb-theem alternating tam sim no (ac) fais fab zaus, tom qab rectification rau hauv ncaj qha tam sim no, ces nteg. adjustable intermediate zaus hluav taws xob tam sim no, ncaj qha tam sim no los ntawm capacitance thiab induction kauj nyob rau hauv los ntawm lub intermediate zaus alternating tam sim no, tsim high density magnetic teb kab nyob rau hauv induction kauj, induction kauj, thiab txiav nyob rau hauv cheng fang ntawm hlau cov ntaub ntawv, tsim ntau eddy. tam sim no nyob rau hauv cov ntaub ntawv hlau.Kev siv oxygen ib leeg mus txog 42∽45 Nm3 / t.

Qhib hearth steelmaking txheej txheem nrog raw cov ntaub ntawv: (1) hlau thiab steel cov ntaub ntawv xws li npua hlau los yog molten hlau, seem;② oxidants xws li hlau ore, muaj cov pa ntshiab ntshiab, dag nplua nuj ore;③ slagging tus neeg sawv cev xws li txiv qaub (los yog limestone), fluorite, ettringite, thiab lwm yam.;④ deoxidizer thiab alloy additives.

Oxygen nyhuv los muab oxidizing cua, qhib hearth smelting sab hauv tsev combustion gas (lub cub tawg) muaj O2, CO2, H2O, thiab lwm yam., nyob rau hauv kub kub, muaj zog oxidizing roj rau lub pas dej ua ke molten oxygen mov mus txog 0.2 ~ 0.4% ntawm qhov hnyav ntawm cov hlau ib teev, oxidation ntawm lub pas dej molten, kom cov slag ib txwm muaj oxidation siab.

Tswv yim: oxygen mov los ntawm lub cub tawg roj ib leeg, qhov ceev yog qeeb, ntxiv hlau ore los yog oxygen tshuab tuaj yeem ceev cov txheej txheem tshuaj tiv thaiv.

Cov yam ntxwv ntawm cov pa oxygen siv hauv steel mills: oxygen tso tawm thiab hloov siab kawg nrog oxygen.

Yuav ua li cas kom tau raws li cov pa oxygen thov ntawm steel mills?Feem ntau, cov hauv qab no raug coj los ua kom tau raws li qhov yuav tsum tau ua:

* Txais kev thauj khoom sib txawv, qib siab ntawm automation ntawm kev tswj hwm qib siab, kom txo tau cov pa tawm, tuaj yeem ua tau ntau yam kev sib xyaw ua ke

* Ntau pawg ntawm lub ncov-regulating kheej kheej tso tsheb hlau luam yog siv nyob rau hauv ib txwm txoj kev los mus nce lub buffering lub zog, kom tag nrho cov pa oxygen siv nyob rau hauv ib tug tej lub sij hawm ntawm lub sij hawm yog ruaj khov, uas yuav txo tau tus nqi ntawm cov pa tawm thiab txo qhov luaj li cas. ntawm tus ntaus ntawv

* Ntawm qhov taw tes qis ntawm kev siv oxygen, cov pa ntau dhau yog muab rho tawm los ntawm cov kua oxygen extraction;Thaum siv lub ncov oxygen, tus nqi ntawm cov pa oxygen yog compensated los ntawm vaporization.Thaum lub peev xwm tso tawm sab nraud ntawm cov pa oxygen tsis txwv los ntawm lub peev xwm txias, cov txheej txheem liquefaction sab nraud yog siv los ua kom cov pa tawm tawm thiab cov txheej txheem vaporization tau txais los ua kom vaporize cov kua oxygen.

* Txais ntau lub tshuab steel txuas nrog rau daim phiaj rau cov khoom siv roj, uas ua rau tag nrho cov pa oxygen scale ruaj khov raws li lub sijhawm sib txawv ntawm kev siv roj.

Kev sib txuam txheej txheem ntawm cua cais chav tsev

Nyob rau hauv txoj kev loj hlob ntawm oxygen chaw nres tsheb txoj kev npaj yuav tsum tau unit peev xwm, khoom purity, conveying siab, boost txheej txheem, system kev ruaj ntseg, zuag qhia tag nrho layout, suab nrov tswj los ua daim ntawv pov thawj tshwj xeeb.

Loj steel mills nrog oxygen, piv txwv li, txhua xyoo tso zis ntawm 10 lab tons ntawm steel blast furnace txheej txheem nrog oxygen kom tiav 150000 Nm3 / h, txhua xyoo tso zis ntawm 3 lab tons ntawm steel smelting txo qhov cub txheej txheem nrog oxygen kom tiav 240000 Nm3 / h, ua tiav cov txheej txheem loj heev ntawm huab cua sib cais tam sim no yog qib 6 ∽ 100000, thaum xaiv cov cuab yeej loj yuav tsum yog los ntawm tag nrho cov peev txheej hauv cov cuab yeej siv thiab kev ua haujlwm siv hluav taws xob, kev saib xyuas cov khoom seem, npog thaj tsam ntawm kev txiav txim siab.

Oxygen suav rau steelmaking hauv steel zeb

Piv txwv li, ib lub cub tawg muaj lub voj voog ntawm 70min thiab lub sijhawm siv roj ntawm 50min.Thaum cov roj noj yog 8000Nm3 / h, (nruam) cov roj tsim tawm ntawm chav sib cais cua yuav tsum yog 8000 × (50/60) ÷ (70/60) = 5715Nm3 / h.Tom qab ntawd 5800Nm3 / h tuaj yeem xaiv los ua huab cua sib cais.

Lub tonnage dav dav ntawm cov hlau nrog oxygen yog 42-45Nm3 / h (ib tuj), qhov xav tau rau ob qho tib si accounting, thiab qhov no yuav yeej.

Tam sim no, lub peev xwm tsim khoom ntawm Tuam Tshoj cov hlau thiab hlau lag luam tau dhia mus rau qhov ua ntej ntawm lub ntiaj teb, tab sis cov hlau tshwj xeeb, tshwj xeeb tshaj yog qee qhov tseem ceeb ntawm kev lag luam hauv teb chaws thiab tib neeg txoj kev noj qab haus huv ntawm cov hlau tseem nyob ntawm kev xa khoom, yog li cov hlau hauv tsev thiab steel kev lag luam coj los ntawm Baowu Hlau thiab Hlau Hoobkas tseem muaj txoj hauv kev mus ntev, rau qhov kev ua tiav ntawm kev ua haujlwm siab thiab kev ua haujlwm zoo heev yog qhov ceev tshwj xeeb.

Nyob rau hauv xyoo tas los no, qhov kev thov rau huab cua sib cais cov khoom hauv kev lag luam steel tau dhau los ua ntau thiab ntau haiv neeg.Ntau tus neeg siv tsis yog tsuas yog cov pa oxygen xwb, tab sis kuj tseem muaj cov roj purity nitrogen thiab argon roj, lossis lwm yam tsis tshua muaj roj.Tam sim no, Wuhan Hlau thiab Hlau Co., Ltd., Shougang thiab lwm yam steel mills loj muaj ob peb pawg ntawm tag nrho cov khoom cua cais tawm hauv kev ua haujlwm.Cov by-product noble gas ntawm huab cua sib cais pab kiag li lawm tsis tau tsuas yog ua tau raws li qhov kev thov ntawm lub teb chaws ntau lawm, tab sis kuj coj zoo economic kev pab cuam.

Nrog rau kev loj hlob ntawm steel mills, es tsis txhob txhawb huab cua sib cais chav tsev yog mus rau loj-scale thiab huab cua sib cais kev lag luam tom qab ntau xyoo ntawm txoj kev loj hlob, domestic huab cua sib cais tuam txhab uas muag kuj zoo mus cuag nrog lub ntiaj teb no cov thawj kev lag luam, domestic lwm tus neeg, sawv cev. los ntawm hangyang co thiab lwm yam huab cua sib cais cog tau tsim 8-120000 qib ntawm cov khoom sib cais huab cua loj, cov cuab yeej siv hluav taws xob tsawg hauv tsev kuj tau ua tiav kev tshawb fawb thiab kev txhim kho, hluav taws xob cua Tuam Tshoj pib lig, tab sis kuj tseem yog nyob rau hauv kev tshawb fawb thiab kev loj hlob, ntseeg hais tias nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis, kev lag luam roj sib cais hauv Suav teb yuav mus txawv tebchaws, mus rau lub ntiaj teb.