Yuav ua li cas xaiv high-zoo steelmaking recarburizer
Nyob rau hauv cov txheej txheem smelting, vim tsis yog batching los yog them thiab ntau decarburization, tej zaum cov carbon cov ntsiab lus nyob rau hauv cov hlau los yog hlau tsis tau raws li qhov xav tau.Lub sijhawm no, carbon yuav tsum tau ntxiv rau cov hlau lossis hlau molten.Cov ntaub ntawv tseem ceeb feem ntau siv rau carbonization yog anthracite hmoov, carbonized npua hlau, electrode hmoov, roj av coke hmoov, suab coke, charcoal hmoov thiab coke hmoov.Cov kev cai rau recarburizers yog tias qhov siab dua cov ntsiab lus ntawm cov pa roj carbon monoxide, qhov zoo dua, thiab qis dua cov ntsiab lus ntawm cov khoom tsis zoo xws li cov tshauv, cov teeb meem tsis zoo thiab cov leej faj, qhov zoo dua, yog li tsis txhob ua qias tuaj.
Lub smelting ntawm castings siv high-zoo recarburizers tom qab high-temperature calcination ntawm roj av coke nrog ob peb impurities, uas yog qhov tseem ceeb tshaj txuas nyob rau hauv cov txheej txheem recarburization.Qhov zoo ntawm cov recarburizer txiav txim siab qhov zoo ntawm cov hlau molten, thiab kuj txiav txim siab seb puas muaj cov nyhuv graphitization zoo.Nyob rau hauv luv luv, txo molten hlau shrinkage thiab recarburizers ua lub luag haujlwm tseem ceeb.
Thaum tag nrho cov seem hlau yog smelted nyob rau hauv lub cub hluav taws xob, lub graphitized recarburizer yog nyiam.Tom qab qhov kub-kub graphitization kev kho mob, cov pa roj carbon atoms tuaj yeem hloov pauv los ntawm cov txheej txheem tsis sib haum xeeb mus rau qhov kev npaj flake, thiab cov flake graphite tuaj yeem ua graphite zoo li.Qhov zoo tshaj plaws ntawm cov tub ntxhais, txhawm rau pab txhawb kev txhawb nqa ntawm graphitization.Yog li ntawd, peb yuav tsum xaiv ib tug recarburizer uas tau undergone high-temperature graphitization.Vim tias qhov kub siab graphitization kev kho mob, cov ntsiab lus sulfur yog txo los ntawm kev khiav tawm ntawm SO2 roj.Yog li ntawd, cov khoom siv hluav taws xob zoo siab muaj cov ntsiab lus tsis tshua muaj leej faj, w(s) feem ntau tsawg dua 0.05%, thiab zoo dua w(s) yog tsawg dua 0.03%.Nyob rau tib lub sijhawm, qhov no kuj yog qhov qhia tsis ncaj los txiav txim seb nws puas tau txais kev kho mob graphitization kub thiab seb qhov graphitization puas zoo.Yog hais tias qhov kev xaiv recarburizer tsis tau txais kev kho mob siab graphitization, lub peev xwm nucleation ntawm graphite yuav raug txo kom tsawg, thiab lub peev xwm graphitization yuav tsis muaj zog.Txawm hais tias tib cov pa roj carbon ntau tuaj yeem ua tiav, cov txiaj ntsig sib txawv kiag li.
Lub npe hu ua recarburizer yog txhawm rau ua kom cov pa roj carbon ntau hauv cov hlau molten tom qab ntxiv, yog li cov ntsiab lus ruaj khov ntawm cov recarburizer yuav tsum tsis txhob qis dhau, txwv tsis pub kom ua tiav cov ntsiab lus carbon, nws yog ib qho tsim nyog yuav tsum tau ntxiv cov pa roj carbon ntau. cov ntsiab lus.Ntau cov qauv ntawm recarburizer yuav tsis muaj qhov xav tau nce cov nyiaj ntawm lwm cov khoom tsis zoo hauv lub recarburizer, yog li cov hlau molten tsis tuaj yeem tau txais txiaj ntsig zoo dua.
Tsawg leej faj, nitrogen thiab hydrogen ntsiab yog tus yuam sij rau kev tiv thaiv nitrogen pores nyob rau hauv castings, yog li qhov qis nitrogen cov ntsiab lus ntawm recarburizer, qhov zoo dua.Lwm qhov ntsuas ntawm lub recarburizer, xws li noo noo, tshauv, thiab volatile teeb meem, qhov qis dua cov pa roj carbon monoxide, qhov siab dua cov pa roj carbon monoxide, yog li qhov siab dua cov pa roj carbon monoxide, cov ntsiab lus ntawm cov khoom tsis zoo no yuav tsum tsis txhob muaj. siab.
Raws li cov kev sib txawv smelting, hom rauv thiab qhov ntau thiab tsawg ntawm smelting furnaces, nws tseem ceeb heev uas yuav tau xaiv qhov tsim nyog particle loj ntawm lub recarburizer, uas yuav ua tau zoo txhim kho tus nqi nqus thiab nqus tus nqi ntawm cov hlau molten rau lub recarburizer, thiab tsis txhob hnov qab. teeb meem ntawm ntau dhau me me particle loj.Ua los ntawm oxidative burnout ntawm recarburizers.
Nws qhov loj me yog qhov zoo dua: 100kg rauv tsawg dua 10mm, 500kg rauv tsawg dua 15mm, 1.5 tuj rauv tsawg dua 20mm, 20 tuj rauv tsawg dua 30mm.Nyob rau hauv converter smelting, thaum high carbon steel yog siv, ib tug recarburizer nrog ob peb impurities yog siv.Cov kev cai rau recarburizers rau sab saum toj-blown converter steelmaking yog siab ruaj carbon, tsis tshua muaj tshauv, volatile thiab sulfur, phosphorus, nitrogen thiab lwm yam impurities, qhuav, huv si, thiab me me particle loj.Nws ruaj ruaj carbon C ≥ 96%, volatile teeb meem ≤ 1.0%, S ≤ 0.5%, noo noo ≤ 0.5%, particle loj 1-5mm.Yog tias qhov loj me me dhau lawm, nws yooj yim rau hlawv, thiab yog tias nws ntxhib dhau lawm, nws ntab rau saum npoo ntawm molten steel thiab tsis yooj yim absorbed los ntawm molten steel.Rau induction furnaces, particle loj yog 0.2-6 hli, ntawm cov hlau thiab lwm yam dub kub hais yog 1.4-9.5 hli, siab carbon steel yuav tsum tsis muaj nitrogen, thiab particle loj yog 0.5-5 hli, thiab lwm yam. Cov kev xav tau tshwj xeeb yog nyob ntawm hom tshwj xeeb rauv rau smelt lub workpiece Cov hom thiab lwm yam ntsiab lus ntawm cov kev txiav txim tshwj xeeb thiab xaiv.
