Hauv xyoo 1980s, vim qhov khoom tsis txaus ntawmcarbon cov khoomthiab cov txiaj ntsig siab ntawm cov khoom lag luam carbon, cov lag luam carbon feem ntau tau txais txiaj ntsig zoo hauv kev lag luam, thiab cov lag luam carbon tau nce sai thoob plaws hauv lub tebchaws.Txawm li cas los xij, vim tias tsis muaj cov pa roj carbon zoo tshaj plaws, tag nrho cov pa roj carbon kev lag luam nplai me me, nws yog qhov nyuaj los tsim lub zog sib tw.Tsis tas li ntawd, muaj ntau lub peev xwm ntawm cov khoom qis kawg, cov khoom siv tsis txaus thiab kev xav tau ntawm cov khoom siv high-end, thiab cov qauv kev lag luam carbon tsis tsim nyog.Txoj kev loj hlob zeem muag ntawm cov nroj tsuag carbon yog ze ze rau cov txheej txheem ntawm high-tech carbon tsis siv neeg batching.

Cov khoom siv raw ntawm cov khoom siv carbon thiab cov khoom siv carbon yog cov khoom siv carbon.Lawv cov qauv tshuaj, cov yam ntxwv morphological thiab lub cev thiab cov khoom siv tshuaj lom neeg sib txawv heev vim muaj qhov sib txawv thiab cov txheej txheem ntau lawm.Raws li lub cev lub cev tuaj yeem muab faib ua cov khoom siv raw (tag nrho) thiab cov khoom siv kua (adhesives thiab impregnators).

Ntawm lawv, cov khoom siv raw ntawm cov khoom siv roj carbon monoxide tuaj yeem muab faib ua: ntau cov khoom siv ntoo tshauv thiab cov hmoov tshauv tsawg dua raws li cov ntsiab lus ntawm inorganic impurities.Cov ntsiab lus ntawm cov hmoov tshauv tsawg yog feem ntau tsawg dua 1%, xws li roj av coke, asphalt coke, thiab lwm yam. Cov hmoov tshauv ntawm cov ntaub ntawv raw polyash feem ntau yog li 10%, xws limetallurgical coke, anthracite thiab lwm yam.Tsis tas li ntawd, cov khoom xa rov qab hauv kev tsim khoom, xws li graphite crushing, kuj tuaj yeem siv los ua cov khoom siv raw.Vim yog lub luag haujlwm sib txawv thiab siv ntau yam khoom siv raw, lawv cov kev xav tau zoo kuj txawv.