Rau cov khoom sib txawv ntawm cov pa roj carbon thiab graphite electrode, raws li lawv cov kev siv sib txawv, muaj cov kev siv tshwj xeeb thiab cov ntsuas zoo.Thaum xav txog yam khoom siv raw yuav tsum siv rau qee yam khoom, peb yuav tsum xub kawm seb yuav ua li cas thiaj ua tau raws li cov cai tshwj xeeb thiab cov ntsuas zoo.
(1) Kev xaiv cov khoom siv raw rau kev ua cov graphite electrode siv hauv cov txheej txheem electrometallurgical xws li EAF steelmaking.
Lub conductive graphite electrode siv nyob rau hauv cov txheej txheem electrometallurgical xws li EAF steelmaking yuav tsum muaj cov conductivity zoo, zoo mechanical zog, zoo tiv thaiv quenching thiab cua sov ntawm qhov kub thiab txias, corrosion kuj thiab tsis muaj impurity cov ntsiab lus.
① High quality graphite electrodes yog tsim los ntawm roj av coke, pitch coke thiab lwm yam tsawg tshauv raw khoom.Txawm li cas los xij, kev tsim cov graphite electrode xav tau cov cuab yeej siv ntau dua, cov txheej txheem ntev ntws thiab cov cuab yeej nyuaj, thiab lub zog noj ntawm 1 t graphite electrode yog 6000 ~ 7000 kW · H.
② High quality anthracite los yog metallurgical coke yog siv los ua raw khoom los tsim carbon electrode.Kev tsim cov pa roj carbon electrode tsis xav tau cov khoom siv graphitization, thiab lwm cov txheej txheem ntau lawm yog tib yam li kev tsim cov graphite electrode.Lub conductivity ntawm carbon electrode yog heev phem dua li ntawm graphite electrode.Lub resistivity ntawm carbon electrode feem ntau yog 2-3 zaug siab dua li ntawm graphite electrode.Cov ntsiab lus tshauv sib txawv nrog qhov zoo ntawm cov khoom siv raw, uas yog kwv yees li 10%.Tab sis tom qab ntxuav tshwj xeeb, cov hmoov tshauv ntawm anthracite tuaj yeem txo qis dua 5%.Cov hmoov tshauv ntawm cov khoom tuaj yeem raug txo kom txog li 1.0% yog tias cov khoom ntxiv graphitized.Cov pa roj carbon electrode tuaj yeem siv rau smelting ntau EAF steel thiab ferroalloy
③ Siv ntuj graphite ua raw khoom, ntuj graphite electrode tau tsim.Ntuj graphite tsuas yog siv tau tom qab ua tib zoo xaiv thiab nws cov hmoov tshauv txo.Lub resistivity ntawm ntuj graphite electrode yog hais txog ob zaug ntawm graphitized electrode.Tab sis lub zog txhua yam yog qhov tsawg, yooj yim tawg thaum siv.Nyob rau hauv cheeb tsam uas muaj ntau yam graphite ntau lawm, ntuj graphite electrode tuaj yeem tsim los muab EAF me me rau smelt ntau EAF steel.Thaum siv cov graphite ntuj los tsim cov khoom siv hluav taws xob, cov khoom siv thiab cov cuab yeej siv tau yooj yim los daws thiab tus tswv.
④ Graphite electrode yog siv los tsim cov electrode regenerated (los yog graphitized tawg electrode) los ntawm crushing thiab sib tsoo ntawm cov khib nyiab los yog cov khoom pov tseg.Cov hmoov tshauv ntawm cov khoom yog tsis siab (kwv yees li 1%), thiab nws cov conductivity yog phem tshaj li graphitized electrode.Nws cov resistivity yog li ntawm 1.5 npaug ntawm cov graphitized electrode, tab sis nws daim ntawv thov cov nyhuv yog zoo dua li ntawm lub ntuj graphite electrode.Txawm hais tias nws yog ib qho yooj yim los ua tus tswv ntawm cov cuab yeej technology thiab cov khoom siv los tsim cov khoom siv electrode, cov khoom siv raw ntawm graphitization raug txwv, yog li txoj kev no tsis yog txoj kev loj hlob.
Post lub sij hawm: Jun-11-2021