Hauvgraphite electroderau steel ua los yog anode muab tshuaj txhuam rau txhuas thiab magnesium ua (melting electrode), thiaj li yuav ua rau roj av coke (coke) ua tau raws li qhov yuav tsum tau, cov coke yog calcined.Calcination kub, roj av coke volatiles yog suav hais tias yog yam.

(1) Tshem tawm cov dej noo thiab cov ntsiab lus tsis hloov pauv ntawm cov khoom siv raw

Cov ntsiab lus tsis hloov pauv ntawm cov khoom siv raw tuaj yeem raug tshem tawm los ntawm calcination, yog li ua kom cov ntsiab lus ruaj khov ntawm cov khoom siv raw.Cov dej hauv cov khoom siv raw yog tshem tawm los ntawm calcination, uas yog qhov tsim nyog rau kev sib tsoo, kev tshuaj ntsuam thiab kev sib tsoo, txhim kho kev ua haujlwm zoo ntawm cov khoom siv roj carbon monoxide, thiab txhim kho cov khoom zoo.

(2) Txhim kho qhov ceev thiab lub zog ntawm cov khoom siv raw

Tom qab tau calcined, cov khoom carbon shrinks nyob rau hauv ntim, nce nyob rau hauv ceev thiab lub zog vim tshem tawm cov volatiles, thiab tau zoo thermal stability, yog li txo qhov thib ob shrinkage ntawm cov khoom thaum lub sij hawm calcination.

(3) Txhim kho cov conductivity ntawm raw khoom

Tom qab calcination, volatiles raug tshem tawm, thiab cov qauv molecular kuj hloov, txo cov hluav taws xob resistivity thiab txhim kho cov hluav taws xob conductivity ntawm raw cov ntaub ntawv.Feem ntau hais lus, qhov siab dua qib ntawm calcination, qhov zoo dua ntawm cov khoom siv calcined.

(4) Txhim kho oxidation tsis kam ntawm cov khoom siv raw

Tom qab calcination, raws li qhov kub thiab txias ntawm cov ntaub ntawv raw cov ntaub ntawv nce, impurities xws li hydrogen, oxygen thiab sulfur yuav raug tso tawm ua ntu zus los ntawm cov txheej txheem pyrolysis thiab polymerization, thiab cov tshuaj ua haujlwm yuav txo qis thiab lub cev thiab tshuaj lom neeg yuav ruaj khov, yog li txhim kho oxidation. tsis kam ntawm raw khoom.

Calcined char yog tsuas yog siv nyob rau hauv zus tau tej covgraphite electrode, carbon paste khoom, carborundum, zaub mov qib phosphorus kev lag luam, metallurgical kev lag luam thiab calcium carbide, ntawm cov graphite electrode yog siv dav tshaj plaws.Thiab coke tsis muaj forging hlawv kuj tuaj yeem siv ncaj qha rau calcium carbide ua cov khoom tseem ceeb, kev tsim cov silicon carbide thiab boron carbide ua cov ntaub ntawv sib tsoo, tab sis kuj rau cov txheej txheem casting nrog tuab coke thiab lwm yam.