Calcined coke ndi mtundu wa carburizer ndi petroleum coke wamitundu yosiyanasiyana.
Mafotokozedwe akuluakulu a zinthu za graphite ndi ￠150-￠1578 ndi mitundu ina. Ndi yofunikira kwambiri pamakampani achitsulo ndi zitsulo, makampani opanga ma silicon polysilicon, makampani opanga ma emery, makampani opanga zinthu zamlengalenga ndi zinthu zina.
1: Koka ya petroleum
Petroleum coke ndi mafuta olimba akuda kapena akuda okhala ndi imvi yowala komanso opepuka. Ndi zinthu zopyapyala, zozungulira, kapena zonga singano zopangidwa ndi makhiristo a graphite osawoneka bwino.
Mafuta a coke amapangidwa ndi ma hydrocarbon, 90-97% ya kaboni, 1.5-8% ya hydrogen, nayitrogeni, chlorine, sulfure, ndi mankhwala a heavy metal.
Petroleum coke ndi chinthu chochokera ku pyrolysis ya mafuta osaphika mu chipangizo chochedwa coking kuti apange mafuta opepuka pa kutentha kwakukulu.
Mafuta a petroleum coke ndi pafupifupi 25-30% ya mafuta osaphika.
Mphamvu yake yotsika ya ma calories ndi pafupifupi nthawi 1.5-2 kuposa malasha, phulusa silipitirira 0.5%, kutentha kwa mpweya ndi pafupifupi 11%, ndipo khalidwe lake ndi lofanana ndi la anthracite.
2: Muyezo wabwino wa petroleum coke. Petroleum coke yochedwa imatanthauza coke yopangidwa ndi delayed coking unit, yomwe imadziwikanso kuti wamba, palibe muyezo wofanana ndi ##.
Pakadali pano, makampani opanga zinthu m'nyumba amapanga zinthu zambiri motsatira muyezo wa SH0527-92 womwe unapangidwa ndi kampani yakale ya China Petrochemical Corporation.
Muyezowu umagawidwa makamaka malinga ndi kuchuluka kwa sulfure mu petroleum coke.
Koke nambala 1 ndi yoyenera kupanga ma electrode amagetsi a graphite wamba mumakampani opanga zitsulo, komanso imagwiritsidwa ntchito ngati kaboni poyenga aluminiyamu.
Coke nambala 2 imagwiritsidwa ntchito popanga ma electrode paste ndi graphite electrode mu electrolytic cell (ng'anjo) mumakampani opanga aluminiyamu.
Coke nambala 3 imagwiritsidwa ntchito popanga silicon carbide (zinthu zopukutira) ndi calcium carbide (calcium carbide), komanso zinthu zina za carbon, komanso popanga ma anode blocks a aluminiyamu smelter komanso popanga njerwa za carbon kapena pansi pa ng'anjo mu blast furnace.
3: NTCHITO yaikulu ya petroleum coke
NTCHITO yayikulu ya petroleum coke ndi anode yophikidwa kale ndi anode phala ya electrolytic aluminiyamu, kupanga carbon ya carbonizing agent, graphite electrode, smelting industrial silicon ndi mafuta, ndi zina zotero.
Malinga ndi kapangidwe ndi mawonekedwe a petroleum coke, zinthu zopangidwa ndi petroleum coke zitha kugawidwa m'magulu awiri: needle coke, sponge coke, projectile coke ndi powder coke:
(1) Coke yooneka ngati singano, yokhala ndi kapangidwe kofanana ndi singano komanso kapangidwe ka ulusi, imagwiritsidwa ntchito makamaka ngati ma electrode a graphite amphamvu kwambiri komanso ma electrode a graphite amphamvu kwambiri popanga zitsulo.
Popeza kuti needle coke ili ndi zofunikira kwambiri pa kuchuluka kwa sulfure, kuchuluka kwa phulusa, kuchuluka kwa volatilities ndi kuchuluka kwenikweni kwa zinthu, pali zofunikira zapadera pa ukadaulo wopanga ndi zopangira za needle coke.
(2) Siponji coke, yokhala ndi mankhwala ambiri komanso zinthu zochepa zodetsa, imagwiritsidwa ntchito kwambiri m'makampani osungunula aluminiyamu komanso makampani opanga mpweya wa kaboni.
(3) Chokokera kapena chozungulira: ndi chozungulira ndipo m'mimba mwake ndi 0.6-30mm. Nthawi zambiri chimapangidwa kuchokera ku zotsalira za sulfure ndi asphaltene zambiri ndipo chingagwiritsidwe ntchito popanga magetsi, simenti ndi mafuta ena amafakitale okha.
(4) Powder coke: imapangidwa pogwiritsa ntchito njira yophikira madzi yokhala ndi tinthu tating'onoting'ono (m'mimba mwake: 0.1-0.4mm), kuchuluka kwa volatilization komanso kutentha kwakukulu, kotero singagwiritsidwe ntchito mwachindunji pokonzekera ma electrode ndi makampani opanga kaboni.
4: Koka ya petroleum yokhala ndi calcium
Pamene electrode ya graphite yopangira zitsulo kapena anode phala (electrode yosungunulira) ya aluminiyamu ndi magnesium, kuti petroleum coke (coke) ikwaniritse zofunikira, coke iyenera kukonzedwa.
Kutentha kwa calcining nthawi zambiri kumakhala pafupifupi 1300℃, cholinga chake ndikuchotsa kusinthasintha kwa naphthol coke momwe zingathere.
Mwanjira imeneyi, kuchuluka kwa haidrojeni mu mafuta opangidwanso a coke kungachepe, kuchuluka kwa graphitization ya mafuta opangidwa ndi coke kungawongoleredwe, mphamvu yotentha kwambiri komanso kukana kutentha kwa graphite electrode kungawongoleredwe, ndipo mphamvu yamagetsi ya graphite electrode ingawongoleredwe.
Calcining imagwiritsidwa ntchito makamaka popanga ma electrode a graphite, zinthu zopangidwa ndi phala la kaboni, mchenga wa diamondi, makampani opanga phosphorous, makampani opanga zitsulo ndi calcium carbide, zomwe ma electrode a graphite amagwiritsidwa ntchito kwambiri.
Coke yopanda forging ingagwiritsidwe ntchito mwachindunji ngati calcium carbide, silicon carbide ndi boron carbide ngati zipangizo zopunthira.
Itha kugwiritsidwanso ntchito mwachindunji ngati coke pa ng'anjo yophulika ya mafakitale kapena njerwa yophulika yophimba njerwa ya kaboni, komanso ingagwiritsidwe ntchito poponya coke yaying'ono, ndi zina zotero.
Nthawi yotumizira: Novembala-20-2020