Koob coke yog cov nyiaj-grey porous khoom nrog pom tseeb fiber ntau kev coj ua, thiab muaj cov yam ntxwv ntawm cov crystallinity siab, siab zog, siab graphitization, thermal expansion, tsis tshua muaj ablation, thiab lwm yam. cov khoom zoo raw khoom rau kev tsim cov graphite electrodes, roj teeb anode cov ntaub ntawv thiab high-end carbon cov khoom.

Raws li cov khoom siv raw khoom sib txawv siv, koob coke tuaj yeem muab faib ua ob hom: roj-raws li thiab thee-raws li: koob coke ua los ntawm roj av refining khoom yog hu ua roj-raws li koob coke, thiab thee tar pitch thiab nws feem ntawm koob coke. ua los ntawm cov roj yog hu ua coal-based koob coke.Kev tsim cov koob coke nrog cov khoom siv roj av muaj txiaj ntsig zoo rau kev tiv thaiv ib puag ncig, thiab kev siv tsis yooj yim thiab cov nqi tsim khoom tsawg, yog li nws tau them nyiaj ntau dua los ntawm tib neeg.

Roj-raws li koob coke tuaj yeem muab faib ua ob hom: nyoos coke thiab siav coke (calcined coke).Ntawm lawv, coke nyoos yog siv los tsim ntau yam roj teeb tsis zoo electrode cov ntaub ntawv, thiab cov coke siav yog siv los tsim cov hluav taws xob graphite electrodes.Nyob rau hauv xyoo tas los no, nrog rau qhov kev tiv thaiv ib puag ncig hnyav zuj zus, kev loj hlob sai ntawm lub zog tshiab tsheb tau ua rau muaj kev thov siab rau cov khoom siv roj teeb anode;Nyob rau tib lub sijhawm, cov hloov pauv tsis tu ncua ntawm cov tuam txhab steel tau hloov los ntawm cov hluav taws xob rauv taws.Raws li ob qhov teebmeem, kev lag luam xav tau koob coke tau nce ntau.Tam sim no, cov roj-raws li koob coke ntau lawm nyob rau hauv lub ntiaj teb no yog dominated los ntawm American tuam txhab uas muag, thiab tsuas yog ob peb lub tuam txhab xws li Jinzhou Petrochemical, Jingyang Petrochemical thiab Yida Cov Khoom Tshiab tau ua tiav cov khoom ruaj khov hauv kuv lub teb chaws.High-end koob coke cov khoom lag luam tsuas yog tso siab rau kev xa khoom.Tsis tsuas yog siv nyiaj ntau heev, tab sis nws kuj tau yooj yim muaj.Nws yog ib qho tseem ceeb ntawm cov tswv yim tseem ceeb kom ceev cov kev tshawb fawb ntawm cov txheej txheem ntau lawm ntawm koob coke thiab paub lub jacking nrog ntau lawm sai li sai tau.

Cov khoom siv raw yog qhov tseem ceeb cuam tshuam rau qhov zoo ntawm rab koob coke.Cov khoom siv raw tsim nyog tuaj yeem txo qhov nyuaj ntawm kev tsim mesophase suab thiab tshem tawm cov yam tsis ruaj khov tom ntej.Cov khoom siv raw rau kev tsim cov koob coke yuav tsum muaj cov yam ntxwv hauv qab no:

①Cov ntsiab lus ntawm aromatics yog siab, tshwj xeeb tshaj yog cov ntsiab lus ntawm 3 thiab 4-ntiv nplhaib luv sab saw aromatics nyob rau hauv linear kev npaj yog nyiam dua 40% mus rau 50%.Nyob rau hauv txoj kev no, thaum lub sij hawm carbonization, aromatics molecules condense nrog ib leeg los tsim loj planar aromatics molecules, thiab los ntawm loj.π Cov huab cua sib txuas ua ke yog superimposed rau ib leeg los ua ib qho ua tiav graphite zoo li cov lattice

②Asphaltenes thiab colloids uas muaj nyob rau hauv cov qauv molecular ntawm fused-ring loj aromatic hydrocarbons muaj cov ntsiab lus tsawg.Cov tshuaj no muaj zog molecular polarity thiab siab reactivity., Nws yog feem ntau yuav tsum tau hais tias cov heptane insoluble teeb meem yog tsawg dua 2%.

③Cov ntsiab lus sulfur tsis ntau tshaj 0.6%, thiab cov ntsiab lus nitrogen tsis ntau tshaj 1%.Sulfur thiab nitrogen yog ib qho yooj yim rau kev khiav tawm vim qhov kub thiab txias thaum lub sij hawm tsim cov electrodes thiab ua rau cov roj o, uas yuav ua rau tawg ntawm cov electrodes.

④Cov ntsiab lus tshauv tsawg dua 0.05%, thiab tsis muaj cov khoom tsis zoo xws li cov hmoov catalyst, uas yuav ua rau cov tshuaj tiv thaiv mus sai heev thaum lub sij hawm carbonization, ua rau muaj kev nyuaj ntawm kev tsim mesophase spheres, thiab cuam tshuam rau cov khoom ntawm coke.

⑤Cov ntsiab lus ntawm cov hlau hnyav xws li vanadium thiab npib tsib xee tsawg dua 100ppm, vim tias cov khoom sib xyaw ua ke ntawm cov hlau no muaj cov nyhuv catalytic, uas yuav ua rau cov nucleation ntawm mesophase spheres, thiab nws nyuaj rau cov spheres kom loj hlob txaus.Nyob rau tib lub sijhawm, muaj cov hlau impurities nyob rau hauv cov khoom yuav kuj ua rau voids, teeb meem xws li tawg ua rau ib tug txo nyob rau hauv cov khoom muaj zog.

⑥Quinoline insoluble teeb meem (QI) yog xoom, QI yuav txuas nrog ib ncig ntawm lub mesophase, cuam tshuam txoj kev loj hlob thiab fusion ntawm spherical crystals, thiab rab koob coke qauv nrog cov qauv zoo fiber ntau tsis tuaj yeem tau tom qab coking.

⑦Qhov ceev yog ntau dua 1.0g / cm3 los xyuas kom meej txaus yield ntawm coke.

Qhov tseeb, cov roj feedstock uas ua tau raws li cov kev cai saum toj no yog qhov tsawg.Los ntawm qhov kev xav ntawm cov khoom, catalytic cracking roj slurry nrog cov ntsiab lus muaj ntxhiab, furfural extracted roj, thiab ethylene tar yog zoo tagnrho raw khoom rau koob coke ntau lawm.Catalytic cracking roj slurry yog ib qho ntawm cov khoom lag luam ntawm cov catalytic unit, thiab nws feem ntau yog xa mus raws li cov roj uas pheej yig.Vim muaj ntau cov ntsiab lus ntawm aromatic nyob rau hauv nws, nws yog ib tug zoo raw khoom rau zus tau tej cov koob coke nyob rau hauv cov nqe lus ntawm muaj pes tsawg leeg.Qhov tseeb, thoob ntiaj teb Feem coob ntawm koob coke khoom yog npaj los ntawm catalytic cracking roj slurry.