Petroleum coke yog cov khoom siv roj av dub lossis xim av tsaus uas muaj cov xim ci ntsa iab thiab muaj qhov ntxeem tau.

Cov khoom siv roj av coke yog cov hydrocarbons, muaj 90-97% carbon, 1.5-8% hydrogen, nitrogen, chlorine, sulfur thiab cov hlau hnyav. Petroleum coke yog cov khoom lag luam ntawm pyrolysis ntawm cov roj feedstock hauv cov chav coking qeeb ntawm qhov kub siab los tsim cov khoom siv roj sib dua. Cov zis ntawm roj av coke yog li 25-30% ntawm cov roj nyoos. Nws cov nqi calorific qis yog li 1.5-2 npaug ntawm cov thee, cov ntsiab lus tshauv tsis ntau tshaj 0.5%, cov khoom volatile yog li 11%, thiab qhov zoo yog ze rau anthracite. Raws li cov qauv thiab tsos ntawm roj av coke, cov khoom roj av coke tuaj yeem muab faib ua 4 hom: koob coke, daim txhuam cev coke, projectile coke thiab hmoov coke:

(1) Koob coke, nrog rau cov qauv zoo li koob thiab cov qauv fiber, feem ntau yog siv ua cov electrodes graphite muaj zog thiab ultra-high-power hauv kev ua hlau. Vim tias koob coke muaj cov kev cai zoo nruj hauv cov ntsiab lus sulfur, cov ntsiab lus tshauv, cov khoom tsis ruaj khov thiab qhov ceev tiag tiag, muaj cov kev cai tshwj xeeb rau cov thev naus laus zis tsim koob coke thiab cov ntaub ntawv raw.

(2) Cov roj coke uas muaj cov tshuaj lom neeg siab thiab cov ntsiab lus tsis muaj kuab paug tsawg, feem ntau yog siv rau hauv kev lag luam smelting txhuas thiab kev lag luam carbon.

(3) Cov roj coke projectile lossis cov roj coke kheej kheej: Nws yog kheej kheej thiab muaj 0.6-30 hli txoj kab uas hla. Feem ntau nws yog tsim los ntawm cov roj seem uas muaj sulfur ntau thiab cov roj asphaltene ntau thiab tsuas yog siv tau ua roj siv hauv kev lag luam xws li kev tsim hluav taws xob thiab cov cement.

(4) Hmoov coke: Nws yog tsim los ntawm cov txheej txheem coking fluidized, nrog cov khoom me me (0.1-0.4 hli hauv txoj kab uas hla), cov ntsiab lus volatile siab thiab cov coefficient nthuav dav thermal siab, yog li nws tsis tuaj yeem siv ncaj qha rau hauv kev npaj electrode thiab kev lag luam carbon.

Raws li cov ntsiab lus sulfur sib txawv, nws tuaj yeem muab faib ua cov coke uas muaj sulfur ntau (cov ntsiab lus sulfur siab dua 3%) thiab cov coke uas muaj sulfur tsawg (cov ntsiab lus sulfur qis dua 3%). Cov coke uas muaj sulfur tsawg tuaj yeem siv ua cov anode paste thiab cov anodes uas tau ci ua ntej rau cov nroj tsuag txhuas thiab ua cov electrodes graphite rau cov nroj tsuag hlau. Ntawm lawv, cov coke uas muaj sulfur tsawg zoo (cov ntsiab lus sulfur tsawg dua 0.5%) tuaj yeem siv los tsim cov electrodes graphite thiab cov khoom ua kom cov pa roj carbon zoo. Cov coke uas muaj sulfur tsawg ntawm qhov zoo dav dav (tsawg dua 1.5% sulfur) feem ntau siv los tsim cov anodes uas tau ci ua ntej. Cov roj av coke uas tsis zoo feem ntau yog siv rau kev smelting silicon kev lag luam thiab tsim cov anode paste. Cov coke uas muaj sulfur ntau feem ntau yog siv ua roj hauv cov nroj tsuag cement thiab cov nroj tsuag fais fab.

Calcined Petroleum Coke:

Yog hais tias siv cov graphite electrodes rau steelmaking los yog cov anode pastes (melting electrodes) rau aluminium thiab magnesium, yuav tsum tau calcined cov petroleum coke (ntsuab coke) kom haum rau qhov yuav tsum tau ua, cov coke ntsuab yuav tsum tau calcined. Qhov kub calcination feem ntau yog li ntawm 1300 ° C, lub hom phiaj yog kom tshem tawm cov khoom volatile ntawm petroleum coke ntau li ntau tau. Ua li no, cov hydrogen ntawm cov roj av coke rov ua dua tshiab tuaj yeem txo qis, thiab qib graphitization ntawm cov roj av coke tuaj yeem txhim kho, yog li txhim kho lub zog kub thiab tiv taus cua sov ntawm graphite electrode, thiab txhim kho cov hluav taws xob conductivity ntawm graphite electrode. Calcined coke feem ntau yog siv rau hauv kev tsim cov graphite electrodes, cov khoom carbon paste, pob zeb diamond xuab zeb, kev lag luam phosphorus qib zaub mov, kev lag luam metallurgical thiab calcium carbide, ntawm cov graphite electrodes yog cov siv dav tshaj plaws. Cov coke ntsuab tuaj yeem siv ncaj qha rau calcium carbide ua cov khoom tseem ceeb ntawm calcium carbide yam tsis muaj calcination, thiab los tsim silicon carbide thiab boron carbide ua cov khoom siv abrasive. Nws kuj tseem siv tau ncaj qha ua coke rau lub cub tawg hauv kev lag luam metallurgical lossis cov cib carbon rau phab ntsa ntawm lub cub tawg, thiab kuj siv tau ua coke ntom rau cov txheej txheem casting.