Imathiriyeli ekrwada yokuvelisa i-electrode yegraphite yipetroleum coke, inaliti yecoke kunye nepitch yamalahle.

I-petroleum coke yimveliso eqinileyo enokutsha efunyenwe kwi-petroleum residu kunye ne-petroleum asphalt ngokupheka. Umbala umnyama kunye ne-porous, into ephambili yikhabhoni, kwaye umxholo womlotha uphantsi kakhulu, ngokuqhelekileyo ungaphantsi kwe-0.5%. I-petroleum coke luhlobo lwekhabhoni ye-graphitized elula, i-petroleum coke inoluhlu olubanzi lokusetyenziswa kwishishini lemichiza, i-metallurgy kunye namanye amashishini, kwaye iyona nto iphambili yokuvelisa iimveliso zegraphite kunye neemveliso ze-electrolytic aluminium carbon.

Ngokweqondo lokushisa lobushushu, i-petroleum coke inokwahlulwa ibe ziindidi ezimbini: icoke eluhlaza kunye necoke calcined. I-coke yangaphambili ye-petroleum efunyenwe kwi-coking yokulibaziseka iqulethe izinto ezininzi eziguquguqukayo kwaye inamandla aphantsi omatshini. I-coke ye-calcined ifunyenwe ngokubala. Uninzi lweendawo zokucoca e-China zivelisa kuphela i-coke eluhlaza, kwaye imisebenzi emininzi yokubala iqhutyelwa kwizityalo zekhabhoni.

I-petroleum coke inokohlulwa ibe yicoke ephezulu yesulfure (equlethe ngaphezulu kwe-1.5% isulfure), icoke yesulphur ephakathi (equlathe 0.5% -1.5% isulfure), kunye necoke yesulfure ephantsi (equlathe ngaphantsi kwe-0.5% isulfure) iintlobo ezintathu, i-electrode yegraphite kunye nezinye iimveliso ze-graphite ezenziweyo zisebenzisa i-coke yesulfure jikelele.

Inaliti ye-coke luhlobo lwe-coke ekumgangatho ophezulu ene-fibrous texture ecacileyo, ngakumbi i-coefficient ephantsi yokwandisa i-thermal kunye ne-graphitization elula. Xa ibloko ye-coke iphuka, inokwahlulwa ibe ngamasuntswana omcu obhityileyo ngokwendlela yokuthungwa (i-aspect ratio ngokuqhelekileyo ingaphezulu kwe-1.75), kwaye i-anisotropic fibrous structure inokubonwa phantsi kwe-polarized light microscope, ngoko ibizwa ngokuba yi-needle coke.

I-anisotropy yomzimba kunye neyomatshini ye-coke yenaliti ibonakala kakhulu, kwaye inombane kunye ne-thermal conductivity ehambelana ne-axis ende yamasuntswana, kwaye i-coefficient yokwandisa i-thermal iphantsi. Ngexesha lokubunjwa kwe-extrusion, i-axis ende yeengqungquthela ezininzi zicwangciswe ngokuhambelana nolwalathiso lwe-extrusion. Ke ngoko, inaliti ye-coke yeyona nto iphambili yemathiriyeli ekrwada yokuvelisa amandla aphezulu okanye i-electrode ye-graphite ephezulu, enokumelana okuphantsi, i-coefficient encinci yokwandiswa kwe-thermal kunye nokuchasana nokothuka kwe-thermal.

Inaliti ye-coke yohlulwe kwi-oyile yenaliti ye-coke eveliswe kwintsalela ye-petroleum kunye ne-coke yenaliti yamalahle eveliswe kwi-asphalt yamalahle asulungekileyo.

Itha yamalahle yenye yeemveliso eziphambili zokusetyenzwa nzulu kwetela. Ingumxube weentlobo ngeentlobo ze-hydrocarbons, i-viscosity emnyama ephezulu i-semi-solid okanye iqinile kwiqondo lokushisa, ngaphandle kwendawo edibeneyo yokunyibilika, ithambile emva kobushushu, kwaye iyancibilika, kunye nobuninzi be-1.25-1.35g / cm3. Ngokwendawo yayo yokuthambisa yahlulwe kubushushu obuphantsi, obuphakathi kunye nobushushu obuphezulu be-asphalt iintlobo ezintathu. Isivuno se-asphalt yobushushu obuphakathi yi-54-56% yetela yamalahle. Ukubunjwa kwe-coal pitch kuyinkimbinkimbi kakhulu, ehambelana nepropati ye-tar yamalahle kunye nomxholo we-heteroatoms, kwaye iphinda ichaphazeleke kwinkqubo yokupheka kunye neemeko zokucubungula i-tar yamalahle. Kukho izalathisi ezininzi zokubonisa iipropati ze-pitch yamalahle, njenge-asphalt softening point, i-toluene engaxutywanga (TI), i-quinoline engenakunyibilika (QI), ixabiso le-coking kunye neempawu ze-rheological ze-pitch yamalahle.

I-pitch yamalahle isetyenziswa njenge-binder kunye ne-ejenti yokukhulelwa kwishishini lekhabhoni, kwaye iimpawu zayo zinempembelelo enkulu kwinkqubo yokuvelisa kunye nomgangatho wemveliso yeemveliso zekhabhoni. I-asphalt ye-binder ngokubanzi isebenzisa ubushushu obuphakathi okanye i-asphalt elungisiweyo ephakathi nendawo enendawo yokuthambisa ephakathi, ixabiso le-coking ephezulu kunye ne-resin ephezulu ye-beta, kunye ne-ejenti yokufakela kufuneka isebenzise i-asphalt yobushushu obuphakathi nendawo yokuthambisa ephantsi, i-QI ephantsi kunye ne-rheology elungileyo.