Petroleum coke yog cov khoom siv roj av dub lossis tsaus grey tawv tawv nrog cov xim hlau nplaum thiab yog ntxeem tau.

Petroleum coke Cheebtsam yog hydrocarbons, muaj 90-97% carbon, 1.5-8% hydrogen, nitrogen, chlorine, sulfur thiab hnyav hlau compounds.Petroleum coke yog cov khoom lag luam los ntawm pyrolysis ntawm cov roj feedstock nyob rau hauv qeeb coking units ntawm kub kub los tsim cov khoom roj teeb.Cov zis ntawm roj av coke yog li 25-30% ntawm cov roj nyoos.Nws tus nqi qis calorific yog li ntawm 1.5-2 npaug ntawm cov thee, cov hmoov tshauv tsis ntau tshaj 0.5%, qhov teeb meem tsis hloov pauv yog li 11%, thiab qhov zoo yog ze rau anthracite.Raws li cov qauv thiab cov tsos ntawm cov roj av coke, cov khoom siv 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 pom tseeb koob zoo li qauv thiab fiber ntau kev ntxhib los mos, yog tsuas yog siv raws li high-power thiab ultra-high-power graphite electrodes nyob rau hauv steelmaking.Txij li rab koob coke muaj cov kev cai nruj nruj raws li cov ntsiab lus ntawm cov sulfur, cov ntsiab lus ntawm cov hmoov tshauv, cov teeb meem tsis hloov pauv thiab qhov muaj tseeb, muaj cov kev cai tshwj xeeb rau koob coke ntau lawm tshuab thiab cov ntaub ntawv raw.

(2) Daim txhuam cev coke, nrog cov tshuaj lom neeg muaj zog thiab cov ntsiab lus tsis zoo, feem ntau yog siv hauv kev lag luam aluminium smelting thiab carbon kev lag luam.

(3) Projectile coke lossis spherical coke: Nws yog spherical nyob rau hauv cov duab thiab 0.6-30mm inch.Nws feem ntau yog tsim los ntawm high-sulfur thiab high-asphaltene residual roj thiab tsuas yog siv los ua industrial fuels xws li lub zog tsim thiab cement.

(4) hmoov coke: Nws yog tsim los ntawm cov txheej txheem fluidized coking, nrog cov khoom zoo (0.1-0.4mm inch), cov ntsiab lus tsis muaj zog thiab siab thermal expansion coefficient, yog li nws tsis tuaj yeem siv ncaj qha rau hauv kev npaj electrode thiab carbon kev lag luam.

Raws li cov ntsiab lus ntawm cov sulfur sib txawv, nws tuaj yeem muab faib ua cov ntsiab lus sulfur coke (cov ntsiab lus sulfur saum toj no 3%) thiab qis sulfur coke (cov ntsiab lus sulfur hauv qab 3%).Low-sulfur coke tuaj yeem siv ua anode paste thiab prebaked anodes rau txhuas cov nroj tsuag thiab ua graphite electrodes rau steel nroj tsuag.Ntawm lawv, cov coke uas tsis muaj sulfur zoo (cov ntsiab lus sulfur tsawg dua 0.5%) tuaj yeem siv los tsim cov graphite electrodes thiab carbon enhancers.Tsawg-sulfur coke ntawm cov khoom siv dav dav (tsawg dua 1.5% sulfur) feem ntau yog siv los tsim cov anodes prebaked.Tsawg-zoo roj av coke yog tsuas yog siv rau smelting industrial silicon thiab ua anode paste.High-sulfur coke feem ntau yog siv los ua cov roj hauv cov nroj tsuag cement thiab fais fab nroj tsuag.

Calcined Petroleum Coke:

Nyob rau hauv cov ntaub ntawv ntawm graphite electrodes rau steelmaking los yog anode pastes (melting electrodes) rau txhuas thiab magnesium ntau lawm, nyob rau hauv thiaj li yuav hloov cov roj av coke (ntsuab coke) rau qhov yuav tsum tau, lub ntsuab coke yuav tsum tau calcined.Lub calcination kub feem ntau yog nyob ib ncig ntawm 1300 ° C, lub hom phiaj yog tshem tawm cov volatile Cheebtsam ntawm roj av coke kom ntau li ntau tau.Nyob rau hauv txoj kev no, cov ntsiab lus hydrogen ntawm cov roj av coke rov ua dua tuaj yeem raug txo, thiab cov qib graphitization ntawm cov roj av coke tuaj yeem txhim kho, yog li txhim kho qhov kub thiab txias thiab kub tsis kam 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, carbon paste khoom, pob zeb diamond xuab zeb, zaub mov-qib phosphorus kev lag luam, metallurgical kev lag luam thiab calcium carbide, cov graphite electrodes yog cov feem ntau lug siv.Cov coke ntsuab tuaj yeem siv ncaj qha rau calcium carbide ua cov khoom tseem ceeb ntawm calcium carbide yam tsis muaj calcination, thiab tsim silicon carbide thiab boron carbide ua cov ntaub ntawv abrasive.Nws tseem tuaj yeem siv ncaj qha los ua coke rau qhov cub tawg hauv kev lag luam metallurgical lossis carbon cib rau blast furnace phab ntsa hauv ob sab phlu, thiab tseem tuaj yeem siv ua coke ntom rau txheej txheem casting.