Hauv kev tsim cov Khoom Siv Hluav Taws Xob (tseem hu ua Ductile Iron), kev siv cov carburizers zoo yog qhov tseem ceeb kom ua tiav cov khoom xav tau ntawm cov khoom kawg.Feem ntau siv recarburizer yoggraphite roj av coke (GPC), uas yog tsim los ntawm cov roj av coke los ntawm cov txheej txheem kub-kub.

Thaum xaiv lub recarburiser rau cov khoom siv hlau, ntau yam yuav tsum tau xav txog.Qhov tseem ceeb tshaj plaws ntawm cov ntsiab lus no yog tsau cov ntsiab lus carbon, cov ntsiab lus sulfur, cov ntsiab lus tshauv, cov ntsiab lus tsis hloov pauv, cov ntsiab lus nitrogen thiab cov ntsiab lus hydrogen.

Cov ntsiab lus ruaj khov yog qhov feem pua ​​​​ntawm cov pa roj carbon seem hauv graphite petroleum coke tom qab tag nrho cov volatiles thiab tshauv tau hlawv.Qhov siab dua cov ntsiab lus ntawm cov pa roj carbon monoxide, qhov zoo dua cov recarburiser yog nce cov ntsiab lus carbon hauv cov hlau molten.graphite petroleum coke nrog cov ntsiab lus ruaj khov ntawm yam tsawg 98% yog pom zoo rau kev tsim cov hlau ductile.

Sulfur yog ib qho impurity nyob rau hauv graphite roj av coke thiab nws lub xub ntiag tuaj yeem cuam tshuam rau qhov kawg ntawm cov khoom siv hlau.Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tau xaiv ib qho graphite roj av coke nrog cov ntsiab lus sulfur tsawg (feem ntau tsawg dua 1%).

Cov ntsiab lus tshauv yog tus nqi ntawm cov khoom tsis-combustible tam sim no nyob rau hauv graphite petroleum coke.Cov hmoov tshauv siab tsim cov slag nyob rau hauv lub cub tawg, uas ua rau kom cov nqi thiab txo efficiency.Qhov no yog vim li cas nws raug pom zoo kom siv graphite roj av coke nrog cov hmoov tshauv hauv qab 0.5%.

Cov teeb meem tsis haum xeeb suav nrog cov roj av lossis cov kua dej uas tau tso tawm thaum lub graphite roj av coke yog cua sov.Cov ntsiab lus tsis hloov pauv siab dua qhia tias graphite roj av coke tuaj yeem tso cov pa roj ntau dua, uas tuaj yeem tsim porosity hauv cov khoom kawg.Yog li, graphite petroleum coke nrog cov ntsiab lus tsis hloov pauv ntawm tsawg dua 1.5% yuav tsum tau siv.

Nitrogen cov ntsiab lus yog lwm yam impurity nyob rau hauv graphite roj av coke uas yuav tsum tau khaws cia qis dua vim nws tuaj yeem cuam tshuam rau cov khoom siv ntawm cov hlau nrum nodular.graphite petroleum coke nrog tsawg dua 1.5% nitrogen cov ntsiab lus yog zoo tagnrho rau nodular cam khwb cia hlau ntau lawm.

Thaum kawg, cov ntsiab lus hydrogen yog lwm yam uas yuav tsum tau xav txog thaum xaiv cov pa roj carbon monoxide rau nodular cam khwb cia hlau ntau lawm.Cov qib hydrogen ntau dua tuaj yeem ua rau muaj qhov brittleness thiab txo ductility.graphite petroleum coke nrog hydrogen cov ntsiab lus tsawg dua 0.5% yog nyiam.

Nyob rau hauv cov ntsiab lus, nodular cam khwb cia hlau ntau lawm yuav tsum tau ib tug high-zoo carbon raiser uas ua tau raws li cov kev cai tshwj xeeb rau taag carbon cov ntsiab lus, sulfur ntsiab lus, tshauv ntsiab lus, volatile teeb meem, nitrogen cov ntsiab lus, thiab hydrogen cov ntsiab lus.Kev siv cov graphite roj av coke uas ua tau raws li cov kev cai no yuav ua kom cov hlau zoo nodular cam khwb cia, tseem hu ua Ductil Iron lossis SG hlau.