Cov khoom siv raw rau kev tsim cov graphite electrodes muaj xws li roj av coke, koob coke thiab thee tar pitch:

Petroleum coke yog ib yam khoom uas combustible tau los ntawm coking roj av residue thiab petroleum pitch.Cov xim yog xim dub thiab ntxeem tau, lub ntsiab tseem ceeb yog carbon, thiab cov ntsiab lus tshauv tsawg heev, feem ntau qis dua 0.5%.Petroleum coke yog hom graphitized yooj yim.Petroleum coke yog siv dav hauv kev lag luam chemical, metallurgy thiab lwm yam lag luam.Nws yog cov khoom siv tseem ceeb rau kev tsim cov khoom siv graphite thiab cov khoom siv carbon rau electrolytic aluminium.

Raws li kev kho cua sov kub, roj av coke tuaj yeem muab faib ua coke ntsuab thiab calcined coke.Cov qub yog roj av coke tau los ntawm kev ncua coking, uas muaj cov teeb meem loj heev thiab muaj zog txhua yam.Calcined coke yog tau los ntawm calcining ntsuab coke.Feem ntau cov refineries hauv Suav teb tsuas yog tsim cov coke ntsuab, thiab feem ntau ntawm cov kev ua haujlwm calcination yog ua nyob rau hauv cov nroj tsuag carbon.

Petroleum coke tuaj yeem muab faib ua cov coke siab sulfur (ntau dua 1.5% cov ntsiab lus sulfur), nruab nrab sulfur coke (0.5% -1.5% sulfur cov ntsiab lus) thiab qis sulfur coke (tsawg dua 0.5% cov ntsiab lus sulfur).Graphite electrodes thiab lwm yam khoom siv graphite feem ntau yog tsim los siv cov coke uas tsis muaj sulfur.

Koob coke yog ib hom coke nrog pom tseeb fibrous zoo nkauj, tsis tshua muaj thermal expansion coefficient thiab yooj yim graphitization.Thaum cov coke block tawg lawm, nws tuaj yeem muab faib ua cov kab ntev thiab nyias nyias (ntev mus rau qhov dav piv feem ntau siab dua 1.75) raws li kev ntxhib los mos.Cov qauv anisotropic fibrous tuaj yeem pom nyob rau hauv polarizing microscope, yog li nws hu ua koob coke.

Lub anisotropy ntawm lub cev thiab txhua yam khoom ntawm koob coke yog pom tseeb heev.Cov kev taw qhia thaum uas tig mus rau qhov ntev axis ntawm cov khoom muaj hluav taws xob zoo thiab thermal conductivity, thiab coefficient ntawm thermal expansion yog tsawg.Thaum lub sij hawm extrusion molding, ntev axes ntawm feem ntau hais yog teem nyob rau hauv cov kev taw qhia ntawm extrusion.Yog li, koob coke yog cov khoom siv tseem ceeb rau kev tsim hluav taws xob siab lossis ultra-high-power graphite electrodes.Cov graphite electrodes ua tau tsis tshua muaj zog, me me thermal expansion coefficient, thiab zoo thermal shock kuj.

Koob coke tau muab faib ua roj-raws li koob coke ua los ntawm roj av residue thiab thee-based koob coke ua los ntawm refined thee tar pitch.

Coal tar pitch yog ib qho ntawm cov khoom tseem ceeb ntawm thee tar sib sib zog nqus ua.Nws yog ib qho kev sib xyaw ntawm ntau hom hydrocarbons, dub siab viscosity semi-khoom los yog khoom nyob rau hauv chav tsev kub, tsis tas melting point, softening tom qab tshav kub, thiab ces melting, nrog ib tug ceev ntawm 1.25-1.35g / cm3.Raws li nws cov softening point yog muab faib ua tsawg kub, nruab nrab thiab siab kub asphalt peb.Cov txiaj ntsig ntawm nruab nrab kub asphalt yog 54-56% ntawm cov thee tar.Cov txheej txheem ntawm cov thee bitumen yog qhov nyuaj heev, uas muaj feem xyuam rau cov khoom ntawm thee tar thiab cov ntsiab lus ntawm heteroatoms, thiab tseem cuam tshuam los ntawm coking technology system thiab cov txheej txheem ntawm cov thee tar.Muaj ntau qhov ntsuas los qhia txog cov khoom ntawm thee asphalt, xws li asphalt softening point, toluene insoluble matter (TI), quinoline insoluble matter (QI), coking value and rheological property of the coal asphalt.

Coal pitch yog siv los ua binder thiab impregnating tus neeg sawv cev hauv kev lag luam carbon.Nws cov khoom muaj txiaj ntsig zoo rau cov txheej txheem tsim khoom thiab cov khoom siv carbon zoo.Binder asphalt feem ntau siv cov ntsiab lus softening nruab nrab, siab coking nqi, siab beta resin nruab nrab kub los yog nruab nrab kub hloov asphalt, impregnating tus neeg saib xyuas siv qis softening point, qis QI, rheology yuav ua tau zoo nruab nrab kub asphalt.

• Kev siv graphite electrode

Graphite electrode muaj ntau yam kev siv, feem ntau yog siv rau hauv hluav taws xob rauv steelmaking, ore thermal rauv, tsis kam rauv, thiab lwm yam.

1. Graphite electrode yog siv nyob rau hauv arc steelmaking rauv

Cov neeg siv khoom tseem ceeb ntawm lub tshuab hluav taws xob steelmaking, hluav taws xob rauv steelmaking yog siv graphite electrode rau hauv lub cub tawg tam sim no, muaj zog tam sim no nyob rau hauv qis kawg ntawm cov electrode los ntawm cov pa roj arc tawm, siv cov arc generated tshav kub rau smelting, raws li qhov loj ntawm Lub tshuab hluav taws xob muaj peev xwm, nrog cov kab sib txawv ntawm graphite electrodes, txhawm rau ua kom siv cov electrodes tas li, electrodes los ntawm electrode xov sib txuas, Cov graphite electrode siv hauv steelmaking nyiaj li ntawm 70-80% ntawm tag nrho cov nyiaj ntawm graphite electrode.

2. Cov neeg siv khoom siv hluav taws xob hluav taws xob hluav taws xob

Mineral rauv yog tsuas yog siv rau zus tau tej cov ferroalloy, ntshiab silicon, daj phosphorus, matte thiab calcium carbide.Nws cov yam ntxwv yog tias qhov qis ntawm cov hluav taws xob hluav taws xob yog faus rau hauv tus nqi, yog li ntxiv rau cov cua sov tsim los ntawm cov arc nruab nrab ntawm lub phaj thiab tus nqi, qhov tam sim no los ntawm kev them nqi los ntawm kev tiv thaiv ntawm tus nqi kuj tsim kom sov, txhua tus. tuj ntawm silicon yuav tsum tau noj li 150kg / graphite electrode, txhua tuj daj phosphorus yuav tsum tau noj li 40kg graphite electrode.

3, rau cov cua sov kuj

Kev tsim cov khoom siv graphite nrog graphitization rauv, melting iav rauv thiab cov khoom siv ntawm silicon carbide rauv yog cov cua sov ua haujlwm, lub qhov cub ntsia tho cua sov ua haujlwm, kuj yog cov khoom cua sov.Feem ntau, cov conductive graphite electrode yog muab tso rau hauv lub cub tawg lub taub hau phab ntsa ntawm qhov kawg ntawm lub hearth, yog li cov conductive electrode tsis tas li noj.

Tsis tas li ntawd, ntau cov graphite electrode blanks kuj tseem siv rau kev ua ntau yam crucible, graphite nkoj, kub casting pwm thiab lub tshuab nqus tsev hluav taws xob cua sov lub cev thiab lwm yam khoom tshwj xeeb.Piv txwv li, nyob rau hauv kev lag luam quartz iav, 10t graphite electrode dawb paug yog yuav tsum tau rau txhua txhua 1t capacitor raj ntau lawm, thiab 100kg electrode dawb paug yog noj rau txhua txhua 1t quartz cib ntau lawm.

#carbon raiser #graphite electrode #carbon addictive #graphited roj av coke # koob coke #petroleum coke