Rau ntau hom carbon thiab graphite electrode khoom, raws li lawv siv sib txawv, muaj cov kev cai siv tshwj xeeb thiab cov cim qhia zoo. Thaum xav txog hom khoom siv raw twg yuav tsum siv rau ib yam khoom, peb yuav tsum xub kawm paub yuav ua li cas kom ua tau raws li cov kev cai tshwj xeeb thiab cov cim qhia zoo no.
(1) Kev xaiv cov khoom siv raw rau kev coj ua graphite electrode siv rau hauv cov txheej txheem electrometallurgical xws li EAF steelmaking.
Cov hluav taws xob graphite conductive siv rau hauv cov txheej txheem electrometallurgical xws li EAF steelmaking yuav tsum muaj kev coj ua zoo, lub zog kho tshuab kom zoo, tiv taus quenching thiab cua sov ntawm qhov kub siab, tiv taus corrosion thiab cov ntsiab lus tsis huv tsawg.
① Cov electrodes graphite zoo yog tsim los ntawm roj av coke, suab coke thiab lwm yam khoom siv raw uas tsis muaj tshauv ntau. Txawm li cas los xij, kev tsim cov electrode graphite xav tau ntau yam khoom siv, cov txheej txheem ntev thiab cov thev naus laus zis nyuaj, thiab kev siv hluav taws xob ntawm 1 t graphite electrode yog 6000 ~ 7000 kW · H.
② Cov tshuaj anthracite lossis cov coke metallurgical zoo siv ua cov khoom siv raw los tsim cov electrode carbon. Kev tsim cov electrode carbon tsis xav tau cov khoom siv graphitization, thiab lwm cov txheej txheem tsim khoom zoo ib yam li kev tsim cov electrode graphite. Cov conductivity ntawm cov electrode carbon phem dua li ntawm graphite electrode. Lub resistivity ntawm cov electrode carbon 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 li 10%. Tab sis tom qab kev ntxuav tshwj xeeb, cov ntsiab lus tshauv ntawm anthracite tuaj yeem txo qis dua 5%. Cov ntsiab lus tshauv ntawm cov khoom tuaj yeem txo qis txog li 1.0% yog tias cov khoom raug graphitized ntxiv. Cov electrode carbon tuaj yeem siv rau kev smelting cov hlau EAF thiab ferroalloy.
③ Siv cov graphite ntuj ua cov khoom siv raw, cov electrode graphite ntuj tau tsim tawm. Cov graphite ntuj tsuas yog siv tau tom qab xaiv zoo thiab nws cov tshauv txo qis. Qhov resistivity ntawm cov electrode graphite ntuj yog li ob npaug ntawm cov electrode graphitized. Tab sis lub zog kho tshuab qis heev, yooj yim tawg thaum siv. Hauv thaj chaw uas muaj ntau cov graphite ntuj tsim, cov electrode graphite ntuj tuaj yeem tsim los muab cov EAF me me los smelt cov hlau EAF. Thaum siv cov graphite ntuj los tsim cov electrode conductive, cov khoom siv thiab cov thev naus laus zis yooj yim daws thiab tswj.
④ Graphite electrode siv los tsim cov electrode rov ua dua tshiab (lossis graphitized tawg electrode) los ntawm kev sib tsoo thiab sib tsoo cov khib nyiab txiav lossis cov khoom pov tseg. Cov tshauv ntsiab lus ntawm cov khoom tsis siab (kwv yees li 1%), thiab nws cov conductivity phem dua li ntawm graphitized electrode. Nws resistivity yog li 1.5 npaug ntawm graphitized electrode, tab sis nws cov nyhuv daim ntawv thov zoo dua li ntawm graphite electrode ntuj. Txawm hais tias nws yooj yim los tswj cov thev naus laus zis thiab cov khoom siv los tsim cov electrode rov ua dua tshiab, cov khoom siv raw ntawm graphitization yog txwv, yog li txoj kev no tsis yog kev coj ua.
Lub sijhawm tshaj tawm: Lub Rau Hli-11-2021