Petroleum coke yog ib yam khoom flammable uas tau los ntawm roj av residue thiab roj av asphalt los ntawm coking. 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 ib yam yooj yim graphitized carbon, roj av coke muaj ntau yam kev siv nyob rau hauv chemical kev lag luam, metallurgy thiab lwm yam lag luam, thiab yog lub ntsiab raw khoom rau zus tau tej cov khoom graphite khoom thiab electrolytic txhuas carbon cov khoom.
Raws li kev kho cua sov kub, roj av coke tuaj yeem muab faib ua ob hom: coke nyoos thiab calcined coke. Cov qub roj av coke tau los ntawm kev ncua coking muaj ntau cov ntsiab lus tsis hloov pauv thiab muaj lub zog tsis muaj zog. Lub calcined coke yog tau los ntawm calcination. Feem ntau cov refineries nyob rau hauv Tuam Tshoj tsuas yog raw coke, thiab feem ntau calcination yog ua nyob rau hauv cov nroj tsuag carbon.
Petroleum coke tuaj yeem muab faib ua cov coke siab sulfur (muaj ntau dua 1.5% sulfur), nruab nrab sulfur coke (muaj 0.5% -1.5% sulfur), thiab qis sulfur coke (muaj tsawg dua 0.5% sulfur) peb hom, graphite electrodes thiab lwm yam khoom siv graphite feem ntau siv tsawg cov sulfur coke.
Koob coke yog ib hom zoo coke nrog pom tseeb fibrous kev ntxhib los mos, tshwj xeeb tshaj yog tsis tshua muaj thermal expansion coefficient thiab yooj yim graphitization. Thaum cov coke blocks tawg, nws tuaj yeem muab faib ua cov kab sib luag raws li qhov kev ntxhib los mos (qhov piv txwv feem ntau yog siab dua 1.75), thiab cov qauv anisotropic fibrous tuaj yeem pom nyob rau hauv lub teeb pom kev zoo polarized, yog li nws hu ua koob coke.
Lub cev thiab txhua yam anisotropy ntawm rab koob coke yog qhov pom tseeb heev, thiab nws muaj cov hluav taws xob zoo thiab thermal conductivity piv rau qhov ntev ntawm cov khoom, thiab thermal expansion coefficient tsawg. Thaum lub sij hawm extrusion molding, ntev axis ntawm feem ntau hais yog teem raws li cov extrusion kev taw qhia. Yog li ntawd, koob coke yog cov khoom siv tseem ceeb rau kev tsim hluav taws xob siab lossis ultra-high-power graphite electrodes, uas muaj qhov tsis muaj zog, me me coefficient ntawm thermal expansion thiab zoo thermal shock resistance.
Koob coke tau muab faib ua roj koob coke uas tsim los ntawm cov roj av residue thiab thee koob coke ua los ntawm refined thee asphalt.
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 muaj ib tug taag melting point, softened tom qab tshav kub, thiab ces melted, 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 yam. Cov txiaj ntsig ntawm qhov nruab nrab kub asphalt yog 54-56% ntawm cov tar. Cov txheej txheem ntawm cov thee pitch yog qhov nyuaj heev, uas cuam tshuam nrog cov cuab yeej ntawm thee tar thiab cov ntsiab lus ntawm heteroatoms, thiab tseem cuam tshuam los ntawm cov txheej txheem coking thiab cov txheej txheem ntawm cov thee tar. Muaj ntau qhov kev ntsuas los ua tus yam ntxwv ntawm cov khoom siv hluav taws xob, xws li asphalt softening point, toluene insoluble (TI), quinoline insoluble (QI), coking nqi thiab rheological zog ntawm thee suab.
Coal pitch yog siv los ua binder thiab impregnating tus neeg sawv cev hauv kev lag luam carbon, thiab nws cov khoom muaj txiaj ntsig zoo rau cov txheej txheem tsim khoom thiab cov khoom zoo ntawm cov khoom siv carbon. Binder asphalt feem ntau siv nruab nrab kub lossis nruab nrab kub hloov asphalt nrog qhov nruab nrab softening point, siab coking nqi thiab siab beta resin, thiab tus neeg sawv cev impregnation yuav tsum siv nruab nrab kub asphalt nrog qis softening point, qis QI thiab zoo rheology.
Post lub sij hawm: Feb-07-2025