Coke ya petroleum ndi chinthu cholimba chomwe chimayaka moto chomwe chimapezeka kuchokera ku zotsalira za petroleum ndi phula la petroleum pogwiritsa ntchito coking. Mtundu wake ndi wakuda komanso woboola, chinthu chachikulu ndi kaboni, ndipo phulusa lake ndi lochepa kwambiri, nthawi zambiri sili pansi pa 0.5%. Coke ya petroleum ndi mtundu wa kaboni wosavuta kugwiritsa ntchito, coke ya petroleum imagwiritsidwa ntchito kwambiri m'makampani opanga mankhwala, zitsulo ndi mafakitale ena, ndipo ndiye chinthu chachikulu chopangira zinthu zopangira graphite ndi zinthu zopangira electrolytic aluminiyamu carbon.
Malinga ndi kutentha kwa mankhwala, petroleum coke ingagawidwe m'mitundu iwiri: raw coke ndi calcined coke. Petroleum coke yakale yomwe imapezeka kuchokera ku dayed coking ili ndi zinthu zambiri zosinthasintha ndipo ili ndi mphamvu zochepa zamakaniko. Calcined coke imapezeka pogwiritsa ntchito calcination. Malo ambiri oyeretsera zinthu ku China amapanga coke yaiwisi yokha, ndipo ntchito zambiri za calcination zimachitika m'mafakitale a kaboni.
Mafuta a coke akhoza kugawidwa m'magulu atatu: coke ya sulfure yambiri (yomwe ili ndi sulfure yoposa 1.5%), coke ya sulfure yapakatikati (yomwe ili ndi sulfure ya 0.5%-1.5%), ndi coke ya sulfure yochepera (yomwe ili ndi sulfure yochepera 0.5%), ma electrode a graphite ndi zinthu zina zopangira graphite nthawi zambiri amagwiritsa ntchito kupanga coke ya sulfure yocheperako.
Needle coke ndi mtundu wa coke yapamwamba kwambiri yokhala ndi kapangidwe ka fibrous, makamaka kutentha kochepa komanso graphitization yosavuta. Pamene coke block yasweka, imatha kugawidwa m'magulu opyapyala malinga ndi kapangidwe kake (chiŵerengero cha mbali nthawi zambiri chimakhala choposa 1.75), ndipo kapangidwe ka anisotropic fibrous kangawonekere pansi pa maikulosikopu ya kuwala kozungulira, kotero imatchedwa needle coke.
Kuchuluka kwa mphamvu ya needle coke m'thupi ndi m'makina n'koonekeratu, ndipo kuli ndi mphamvu yabwino yamagetsi ndi kutentha yofanana ndi mzere wautali wa tinthu tating'onoting'ono, ndipo mphamvu yowonjezera kutentha imakhala yochepa. Pa nthawi yopangira extrusion, mzere wautali wa tinthu tating'onoting'ono timakonzedwa motsatira njira yotulutsira. Chifukwa chake, needle coke ndiye chinthu chofunikira kwambiri popanga ma electrode a graphite amphamvu kwambiri kapena amphamvu kwambiri, omwe ali ndi mphamvu yochepa yotsutsa, mphamvu yochepa yotulutsa kutentha komanso mphamvu yabwino yotsutsa kutentha.
Needle coke imagawidwa m'magulu awiri: mafuta a needle coke opangidwa kuchokera ku mafuta otsalira ndi malasha a needle coke opangidwa kuchokera ku phula la malasha loyengedwa bwino.
Ma phula a malasha ndi chimodzi mwa zinthu zazikulu zomwe zimagwiritsidwa ntchito popanga phula la malasha. Ndi chisakanizo cha ma hydrocarbon osiyanasiyana, ma viscosity akuda okhala ndi semi-solid kapena solid kutentha kwa chipinda, opanda malo okhazikika osungunuka, ofewa pambuyo pa kutentha, kenako amasungunuka, ndi kuchuluka kwa 1.25-1.35g/cm3. Malinga ndi malo ake ofewa, amagawidwa m'magulu atatu a phula lotentha pang'ono, lapakati komanso lotentha kwambiri. Kuchuluka kwa phula la pakati ndi 54-56% ya phula la malasha. Kapangidwe ka phula la malasha ndi kovuta kwambiri, komwe kumakhudzana ndi katundu wa phula la malasha ndi kuchuluka kwa heteroatoms, ndipo kumakhudzidwanso ndi njira yopangira coking ndi momwe phula la malasha limagwirira ntchito. Pali ma index ambiri ofotokozera katundu wa phula la malasha, monga malo ofewa a phula, toluene insoluble (TI), quinoline insoluble (QI), coking value ndi rheological properties of coal pitch.
Malasha amagwiritsidwa ntchito ngati chomangira ndi chovikira mpweya m'makampani opanga mpweya, ndipo makhalidwe ake amakhudza kwambiri njira yopangira ndi ubwino wa zinthu zopangidwa ndi mpweya. Malasha ovikira mpweya nthawi zambiri amagwiritsa ntchito phula losinthidwa kutentha kwapakati kapena kutentha kwapakati lomwe lili ndi malo ofewetsa pang'ono, mtengo wapamwamba wa coking ndi beta resin wambiri, ndipo chomangira mpweya chiyenera kugwiritsa ntchito phula lotentha kwapakati lomwe lili ndi malo ofewetsa otsika, QI yochepa komanso rheology yabwino.
Nthawi yotumizira: Feb-07-2025