I-petroleum coke iwumkhiqizo kaphethiloli oqinile omnyama noma ompunga oqinile one-metallic luster futhi unezimbobo.

Izingxenye ze-petroleum coke zingama-hydrocarbon, aqukethe i-carbon engu-90-97%, i-hydrogen engu-1.5-8%, i-nitrogen, i-chlorine, i-sulfur kanye nama-compounds ensimbi esindayo. I-petroleum coke ingumkhiqizo ophuma ku-pyrolysis kawoyela we-feedstock kuma-coking units aphuzile emazingeni okushisa aphezulu ukuze kukhiqizwe imikhiqizo kawoyela okhanyayo. Umkhiqizo we-petroleum coke cishe u-25-30% wamafutha aluhlaza. Inani lawo eliphansi lama-calorie cishe liphindwe izikhathi ezingu-1.5-2 kunelamala, okuqukethwe komlotha akudluli ku-0.5%, i-volatile matter cishe i-11%, futhi ikhwalithi iseduze ne-anthracite. Ngokwesakhiwo kanye nokubukeka kwe-petroleum coke, imikhiqizo ye-petroleum coke ingahlukaniswa ngezinhlobo ezine: i-needle coke, i-sponge coke, i-projectile coke kanye ne-powder coke:

(1) I-Needle coke, enesakhiwo esicacile esifana nenaliti kanye nokuthungwa kwefayibha, isetshenziswa kakhulu njengama-electrode e-graphite anamandla aphezulu kanye namandla aphezulu kakhulu ekwenzeni insimbi. Njengoba i-needle coke inezidingo eziqinile zekhwalithi maqondana nokuqukethwe kwe-sulfur, okuqukethwe komlotha, izinto eziguquguqukayo kanye nobuningi beqiniso, kunezidingo ezikhethekile zobuchwepheshe bokukhiqiza i-needle coke kanye nezinto zokusetshenziswa.

(2) I-Sponge coke, ene-reactivity ephezulu yamakhemikhali kanye nokuqukethwe okuphansi kokungcola, isetshenziswa kakhulu embonini yokuncibilikisa i-aluminium kanye nemboni yekhabhoni.

(3) I-coke eqhumayo noma i-coke eyindilinga: Inesimo esiyindilinga futhi ububanzi bayo bungu-0.6-30mm. Ngokuvamile ikhiqizwa ngowoyela osele one-sulfur ephezulu kanye ne-asphaltene ephezulu futhi ingasetshenziswa kuphela njengamafutha ezimboni njengokukhiqiza ugesi kanye nesamente.

(4) I-Powder coke: Ikhiqizwa ngenqubo yokupheka ephekiwe ngoketshezi, enezinhlayiya ezincane (ububanzi obungu-0.1-0.4mm), okuqukethwe okuphezulu kokuguquguquka kanye ne-thermal expansion coefficient ephezulu, ngakho-ke ayikwazi ukusetshenziswa ngqo ekulungiseleleni i-electrode kanye nemboni yekhabhoni.

Ngokwezinga elihlukile lesibabule, lingahlukaniswa libe yi-coke ene-sulfur ephezulu (okuqukethwe kwe-sulfur okungaphezu kuka-3%) kanye ne-coke ene-sulfur ephansi (okuqukethwe kwe-sulfur okungaphansi kuka-3%). I-coke ene-sulfur ephansi ingasetshenziswa njenge-anode paste kanye nama-anode abhakiwe kusengaphambili ezitshalo ze-aluminium kanye nama-electrode e-graphite ezitshalo zensimbi. Phakathi kwazo, i-coke ene-sulfur ephansi esezingeni eliphezulu (okuqukethwe kwe-sulfur okungaphansi kuka-0.5%) ingasetshenziswa ukukhiqiza ama-electrode e-graphite kanye nezithuthukisi ze-carbon. I-coke ene-sulfur ephansi ekhwalithi ejwayelekile (ngaphansi kuka-1.5% we-sulfur) ivame ukusetshenziselwa ukukhiqiza ama-anode abhakiwe kusengaphambili. I-coke ene-petroleum esezingeni eliphansi isetshenziswa kakhulu ekuncibilikiseni i-silicon yezimboni kanye nokukhiqiza i-anode paste. I-coke ene-sulfur ephezulu isetshenziswa njengophethiloli ezitshalweni zesimende nasezitshalweni zikagesi.

I-Calcined Petroleum Coke:

Uma kwenzeka ama-electrode e-graphite okwenza insimbi noma ama-anode paste (ama-electrode ancibilikisayo) ukuze kukhiqizwe i-aluminium kanye ne-magnesium, ukuze kulungiswe i-petroleum coke (i-green coke) ukuze kuhlangatshezwane nezidingo, i-green coke kumele ifakwe i-calcium. Izinga lokushisa le-calcination ngokuvamile licishe libe ngu-1300 ° C, inhloso ukususa izingxenye eziguquguqukayo ze-petroleum coke ngangokunokwenzeka. Ngale ndlela, okuqukethwe yi-hydrogen ye-petroleum coke ephinde yasetshenziswa kungancishiswa, futhi izinga le-graphitization ye-petroleum coke lingathuthukiswa, ngaleyo ndlela kuthuthukiswe amandla okushisa aphezulu kanye nokumelana nokushisa kwe-graphite electrode, futhi kuthuthukiswe ugesi we-graphite electrode. I-calcined coke isetshenziswa kakhulu ekukhiqizweni kwama-electrode e-graphite, imikhiqizo ye-carbon paste, isihlabathi sedayimane, imboni ye-phosphorus yokudla, imboni ye-metallurgical kanye ne-calcium carbide, phakathi kwazo ama-electrode e-graphite asetshenziswa kakhulu. I-green coke ingasetshenziswa ngqo kwi-calcium carbide njengento eyinhloko ye-calcium carbide ngaphandle kwe-calcination, kanye nokukhiqiza i-silicon carbide kanye ne-boron carbide njengezinto ezihuquzelayo. Ingasetshenziswa ngqo njenge-coke yesithando somlilo embonini yensimbi noma isitini se-carbon sodonga lwesithando somlilo, futhi ingasetshenziswa njenge-coke ende yenqubo yokukhipha.