Recarburizer txheej txheem ntau lawm thiab cov khoom siv raw

Lub recarburizer yog cov khoom siv carbonaceous.Carburizers raug ntxiv thaum lub sij hawm smelting txheej txheem ntxiv cov ntsiab lus carbon poob thaum lub sij hawm smelting steel.Peb paub tias muaj ntau hom recarburizers, xws li roj av coke recarburizers, dag graphite recarburizers, thiab lwm yam, yog li cov ntaub ntawv raw xav tau rau recarburizers kuj txawv, yog li cov ntaub ntawv raw ntawm recarburizers yog dab tsi?Cov txheej txheem ntawm recarburizers yog dab tsi?Xiaobian yuav qhia koj txog cov khoom siv raw thiab cov txheej txheem uas yuav tsum tau ua rau lub recarburizer.

Cov ntaub ntawv raw xav tau rau recarburizers
Muaj ntau ntau yam khoom siv raw rau recarburizers, xws li charcoal, coal-based carbon, coke, graphite, raw petroleum coke, thiab lwm yam, uas muaj ntau yam me me thiab ntau yam kev faib tawm.

Tam sim no, feem ntau ntawm cov recarburizers nyob rau hauv kev ua lag luam, nrog rau graphite electrodes, graphitized roj av coke, thiab lwm yam., siv raw roj av coke.Crude petroleum coke yog tau los ntawm coking ntawm residual roj thiab roj av pitch tau los ntawm distillation ntawm crude roj nyob rau hauv atmospheric siab los yog nqus.Raw petroleum coke muaj cov ntsiab lus impurity siab thiab tsis tuaj yeem siv ncaj qha los ua recarburizer.Nws yuav tsum tau calcined los yog graphitized.High-quality recarburizers feem ntau xav tau graphitization.Nyob rau hauv qhov kub thiab txias, qhov kev npaj ntawm carbon atoms nyob rau hauv lub microscopic duab ntawm graphite, yog li nws yog hu ua graphitization.Graphitization tuaj yeem txo cov ntsiab lus ntawm impurities hauv recarburizer, nce cov ntsiab lus carbon ntawm cov recarburizer, thiab txo cov ntsiab lus sulfur.Recarburizers yog siv rau casting, uas tuaj yeem ua rau kom cov khoom seem steel ntau, txo cov npua hlau los yog txuag npua hlau.

Txheej txheem Carburizer
Vim muaj ntau yam khoom siv raw rau recarburizers, cov txheej txheem kuj txawv, tab sis feem ntau muaj peb yam nram qab no:

1. Calcination
Carbonaceous raw cov ntaub ntawv yog calcined ntawm qhov kub ntawm 1200-1500 ° C thaum tsis muaj cua.Calcination ua rau muaj kev hloov pauv hauv cov qauv thiab physicochemical thaj chaw ntawm ntau yam khoom siv raw.Nws yog cov txheej txheem kev kho cua sov ntawm recarburizer.Ob qho anthracite thiab roj av coke muaj qee yam ntawm cov teeb meem tsis hloov pauv thiab xav tau calcination.Txawm li cas los xij, thaum cov roj av coke thiab pitch coke sib xyaw thiab siv ua ntej calcination, lawv yuav tsum raug xa mus rau calciner rau calcination ua ke nrog roj av coke.

2. Ci
Roasting yog txheej txheem kev kho cua sov uas cov zaub mov nyoos tau muab tso rau ntawm ib qho cua sov hauv qhov chaw tiv thaiv hauv qhov cub cua sov nyob rau hauv qhov xwm txheej ntawm kev sib cais huab cua.
Lub hom phiaj ntawm roasting yog kom tshem tawm cov volatiles.Feem ntau, txog 10 hom volatiles raug tso tawm tom qab roasting.Yog li ntawd, roasting tawm los yog feem ntau 90;Lub binder yog coked, thiab cov khoom yog roasted raws li tej yam txheej txheem, yog li ntawd lub binder yog coked, thiab ib coke network yog tsim los ntawm cov raw khoom hais, uas khov kho txuas tag nrho cov raw khoom nrog sib txawv particle loj ua ke.Ua # # cov khoom muaj qee yam khoom siv lub cev thiab tshuaj lom neeg.Nyob rau tib lub sijhawm, qhov siab dua coking tus nqi, qhov zoo dua;Nyob rau hauv cov ntaub ntawv ntawm geometry ruaj, cov khoom yuav muag muag thiab lub binder yuav migrate thaum lub sij hawm ci txheej txheem.Raws li qhov kub nce, lub coking network yog tsim, uas hardens cov khoom.Yog li ntawd, nws cov duab tsis hloov raws li qhov kub thiab txias.

3. Extrusion
Lub hom phiaj ntawm cov txheej txheem extrusion yog ua kom cov khoom siv raw dhau los ntawm cov pwm ntawm ib qho qauv hauv qab lub siab, thiab dhau los ua ib lub pob zeb nrog cov duab thiab qhov loj me tom qab tau compacted thiab plastically deformed.Cov txheej txheem extrusion molding feem ntau yog cov txheej txheem yas deformation ntawm muab tshuaj txhuam.Cov txheej txheem extrusion yuav siv qhov chaw nyob rau hauv cov khoom chamber thiab ib tug nkhaus nozzle.Cov khoom kub hauv lub chamber yog thawb los ntawm lub ntsiab plunger tom qab.Kev quab yuam tsis tu ncua tshem tawm cov pa roj los ntawm cov khoom siv raw, txuas ntxiv compaction ntawm cov khoom siv raw, thiab ib txhij txav ntawm cov khoom siv raw rau pem hauv ntej.Thaum cov khoom siv raw txav mus rau hauv lub cylindrical ib feem ntawm cov khoom siv chamber, cov khoom siv raw tuaj yeem suav tias yog qhov ruaj khov, thiab txhua qhov txheej txheem yog txav mus rau qhov sib npaug.Thaum cov khoom siv raw nkag mus rau hauv qhov extrusion nozzle thiab muaj arc-puab deformation, cov khoom siv raw ze rau ntawm phab ntsa nozzle yuav muaj kev sib txhuam ntau dua thaum nws nce mus, thiab cov khoom txheej pib khoov.Cov khoom siv raw muaj qhov sib txawv nrawm nrawm, thiab cov khoom siv raw khoom nce siab.Yog li ntawd, qhov ntom ntawm cov khoom raws li cov kev taw qhia radial tsis sib xws, yog li tsim cov kev ntxhov siab sab hauv los ntawm cov nqi sib txawv ntawm cov txheej txheem sab hauv thiab txheej txheej hauv cov txheej txheem extruded.Tom qab muab tshuaj nkag mus rau qhov ncaj deformation, nws yog extruded thiab tsim.
Cov txheej txheem extrusion yuav tsum tau ntxiv ntau dhau rau kev molding, thiab cov ntsiab lus carbon feem ntau tsis ua raws li cov kev xav tau ntawm cov khoom siv zoo recarburizers.Compressed graphite hmoov, vim nws yog ib qho khoom thaiv, tsis muaj cov qauv ntxeem tau, yog li qhov nqus nrawm thiab nqus tau zoo tsis zoo li calcined thiab calcined recarburizers.