I-petroleum coke yimveliso yepetroleum eqinileyo emnyama okanye engwevu emnyama ene-metallic luster kwaye inemingxuma.

Izinto ze-petroleum coke zii-hydrocarbon, eziqulethe i-90-97% yekhabhoni, i-1.5-8% yehydrogen, i-nitrogen, i-chlorine, i-sulfur kunye nee-heavy metal compounds. I-petroleum coke yimveliso ephuma kwi-pyrolysis yeoyile yokutya kwiiyunithi ze-coking ezicothayo kumaqondo obushushu aphezulu ukuvelisa iimveliso zeoyile ezikhaphukhaphu. Imveliso ye-petroleum coke imalunga ne-25-30% yeoyile eluhlaza. Ixabiso layo eliphantsi leekhalori limalunga ne-1.5-2 leelahle, umxholo womlotha awudluli kwi-0.5%, i-volatile matter imalunga ne-11%, kwaye umgangatho usondele kwi-anthracite. Ngokwesakhiwo kunye nokubonakala kwe-petroleum coke, iimveliso ze-petroleum coke zinokwahlulwa zibe ziintlobo ezi-4: i-needle coke, i-sponge coke, i-projectile coke kunye ne-powder coke:

(1) I-Needle coke, enesakhiwo esibonakalayo esifana nenaliti kunye nobume befayibha, isetyenziswa kakhulu njengee-electrode ze-graphite ezinamandla aphezulu kunye namandla aphezulu kakhulu ekwenzeni intsimbi. Ekubeni i-needle coke ineemfuno ezingqongqo zomgangatho ngokwesiqulatho sesalfure, umxholo wothuthu, i-volatile matter kunye noxinano lokwenyani, kukho iimfuneko ezikhethekileyo zobuchwepheshe bokuvelisa i-needle coke kunye nezinto eziluhlaza.

(2) I-sponge coke, ene-reactivity ephezulu yeekhemikhali kunye nomxholo ophantsi wokungcola, isetyenziswa kakhulu kwishishini lokunyibilikisa i-aluminium kunye neshishini le-carbon.

(3) I-projectile coke okanye i-spherical coke: Imile okwesangqa kwaye ububanzi bayo buyi-0.6-30mm. Ngokuqhelekileyo iveliswa ngeoyile eseleyo ye-sulfur ephezulu kunye ne-asphaltene ephezulu kwaye ingasetyenziswa kuphela njengamafutha emizi-mveliso afana nokuvelisa umbane kunye nesamente.

(4) I-Powder coke: Yenziwa ngenkqubo yokucola enyibilikisiweyo, enamasuntswana amancinci (ububanzi obuyi-0.1-0.4mm), umxholo ophezulu wokuguquguquka kunye ne-thermal expansion coefficient ephezulu, ngoko ke ayinakusetyenziswa ngokuthe ngqo ekulungiseleleni i-electrode kunye neshishini lekhabhoni.

Ngokweenxalenye ezahlukeneyo zesalfure, inokwahlulwa ibe yi-coke ene-sulfur ephezulu (umxholo we-sulfur ungaphezulu kwe-3%) kunye ne-coke ene-sulfur ephantsi (umxholo we-sulfur ungaphantsi kwe-3%). I-coke ene-sulfur ephantsi ingasetyenziswa njenge-anode paste kunye ne-anode ezibhakiweyo kwangaphambili kwizityalo ze-aluminium kunye ne-graphite electrodes kwizityalo zentsimbi. Phakathi kwazo, i-coke ene-sulfur ephantsi (umxholo we-sulfur ungaphantsi kwe-0.5%) ingasetyenziselwa ukuvelisa ii-electrode ze-graphite kunye neziphuculi zekhabhoni. I-coke ene-sulfur ephantsi yomgangatho jikelele (ngaphantsi kwe-1.5% yesulfur) idla ngokusetyenziswa ukuvelisa ii-anode ezibhakiweyo kwangaphambili. I-coke yepetroleum ephantsi isetyenziselwa kakhulu ukunyibilikisa i-silicon yemizi-mveliso kunye nokuvelisa i-anode paste. I-coke ene-sulfur ephezulu isetyenziswa njengepetroli kwizityalo zesamente nakwizityalo zamandla.

I-Calcined Petroleum Coke:

Kwimeko yee-electrode ze-graphite zokwenza intsimbi okanye ii-anode pastes (ii-electrode ezinyibilikayo) zemveliso ye-aluminium kunye ne-magnesium, ukuze kulungiswe i-petroleum coke (i-green coke) ngokweemfuno, i-green coke kufuneka ifakwe i-calcined. Ubushushu be-calcination buhlala bumalunga ne-1300 ° C, injongo kukususa izinto eziguquguqukayo ze-petroleum coke kangangoko kunokwenzeka. Ngale ndlela, umxholo we-hydrogen we-petroleum coke esetyenzisiweyo unokunciphisa, kwaye i-graphitization degree ye-petroleum coke inokuphuculwa, ngaloo ndlela kuphuculwe amandla obushushu aphezulu kunye nokumelana nobushushu be-graphite electrode, kwaye kuphuculwe umbane we-graphite electrode. I-calcined coke isetyenziswa kakhulu ekuveliseni ii-electrode ze-graphite, iimveliso ze-carbon paste, isanti yedayimani, imboni ye-phosphorus yokutya, imboni ye-metallurgical kunye ne-calcium carbide, phakathi kwazo ii-electrode ze-graphite zezona zisetyenziswa kakhulu. I-green coke ingasetyenziselwa ngokuthe ngqo kwi-calcium carbide njengezinto eziphambili ze-calcium carbide ngaphandle kwe-calcination, kunye nokuvelisa i-silicon carbide kunye ne-boron carbide njengezinto ezirhabaxa. Ingasetyenziswa ngqo njenge-coke kwi-blast furnace kwishishini le-metallurgical okanye njenge-carbon brick kwi-blast furnace eludongeni, kwaye ingasetyenziswa njenge-dense coke kwinkqubo yokuphosa.