Petroleum coke yog cov khoom khov uas yooj yim hlawv tau los ntawm cov roj av seem thiab roj av asphalt los ntawm coking. Xim yog dub thiab porous, lub ntsiab lus tseem ceeb yog carbon, thiab cov tshauv cov ntsiab lus yog qis heev, feem ntau qis dua 0.5%. Petroleum coke yog ib hom carbon graphite yooj yim, petroleum coke muaj ntau yam kev siv hauv kev lag luam tshuaj lom neeg, metallurgy thiab lwm yam lag luam, thiab yog cov khoom siv tseem ceeb rau kev tsim cov khoom graphite dag thiab cov khoom electrolytic aluminium carbon.
Raws li qhov kub ntawm kev kho cua sov, roj av coke tuaj yeem muab faib ua ob hom: cov roj av coke nyoos thiab cov roj av calcined. Cov roj av coke yav dhau los tau los ntawm kev qeeb coking muaj ntau cov ntsiab lus volatile thiab muaj lub zog kho tshuab qis. Cov roj av coke calcined tau los ntawm calcination. Feem ntau cov chaw ua roj hauv Suav teb tsuas yog tsim cov roj av coke nyoos, thiab feem ntau cov haujlwm calcination tau ua tiav hauv cov nroj tsuag carbon.
Petroleum coke muaj peev xwm muab faib ua cov coke sulfur siab (muaj ntau dua 1.5% sulfur), coke sulfur nruab nrab (muaj 0.5% -1.5% sulfur), thiab coke sulfur qis (muaj tsawg dua 0.5% sulfur) peb hom, graphite electrodes thiab lwm yam khoom siv graphite cuav feem ntau siv cov coke sulfur qis.
Koob coke yog ib hom coke zoo nrog cov qauv fibrous pom tseeb, tshwj xeeb tshaj yog cov coefficient nthuav dav thermal qis thiab yooj yim graphitization. Thaum lub coke thaiv tawg, nws tuaj yeem faib ua cov khoom me me raws li cov qauv (qhov piv ntawm qhov sib piv feem ntau yog siab dua 1.75), thiab cov qauv fibrous anisotropic tuaj yeem pom nyob rau hauv lub tshuab microscope polarized, yog li nws hu ua koob coke.
Qhov anisotropy ntawm lub cev thiab lub tshuab ntawm cov koob coke yog qhov pom tseeb heev, thiab nws muaj hluav taws xob zoo thiab thermal conductivity sib luag rau lub axis ntev ntawm cov khoom me me, thiab cov coefficient thermal expansion qis. Thaum lub sijhawm extrusion molding, lub axis ntev ntawm feem ntau cov khoom me me yog teeb tsa raws li kev taw qhia extrusion. Yog li ntawd, koob coke yog cov khoom siv tseem ceeb rau kev tsim cov electrodes graphite siab lossis ultra-high-power, uas muaj qhov tsis kam qis, coefficient me me ntawm thermal expansion thiab zoo thermal shock tsis kam.
Cov coke koob yog muab faib ua cov roj coke koob uas tsim los ntawm cov roj av seem thiab cov coke koob thee uas tsim los ntawm cov thee asphalt uas tau ua kom huv.
Cov thee tar pitch yog ib qho ntawm cov khoom tseem ceeb ntawm kev ua cov thee tar tob. Nws yog kev sib xyaw ntawm ntau yam hydrocarbons, dub siab viscosity semi-khoom lossis khoom khov ntawm chav tsev kub, tsis muaj qhov chaw yaj ruaj khov, mos tom qab cua sov, thiab tom qab ntawd yaj, nrog qhov ceev ntawm 1.25-1.35g / cm3. Raws li nws qhov taw tes mos muag, muab faib ua peb hom asphalt kub qis, nruab nrab thiab kub siab. Cov txiaj ntsig ntawm asphalt kub nruab nrab yog 54-56% ntawm thee tar. Cov khoom sib xyaw ntawm cov thee pitch yog qhov nyuaj heev, uas cuam tshuam nrog cov khoom ntawm thee tar thiab cov ntsiab lus ntawm heteroatoms, thiab kuj cuam tshuam los ntawm cov txheej txheem coking thiab cov xwm txheej ua tiav ntawm thee tar. Muaj ntau cov ntsuas los piav qhia cov khoom ntawm thee pitch, xws li asphalt softening point, toluene insoluble (TI), quinoline insoluble (QI), coking value thiab rheological properties ntawm thee pitch.
Cov thee thee yog siv los ua cov binder thiab impregnating agent hauv kev lag luam carbon, thiab nws cov khoom muaj feem cuam tshuam loj heev rau cov txheej txheem tsim khoom thiab cov khoom zoo ntawm cov khoom carbon. Cov binder asphalt feem ntau siv cov asphalt kub nruab nrab lossis hloov kho kub nruab nrab nrog qhov taw tes mos nruab nrab, tus nqi coking siab thiab beta resin siab, thiab cov neeg sawv cev impregnation yuav tsum siv cov asphalt kub nruab nrab nrog qhov taw tes mos qis, QI qis thiab rheology zoo.
Lub sijhawm tshaj tawm: Lub Ob Hlis-07-2025