Olu hlobo lwe-electrode yegraphite yenziwa ikakhulu ngepetroleum coke.Kuvunyelwe ukuthwala ukuxinana kwangoku ngaphantsi kwe-12~14A/㎡.Ngokubanzi isetyenziswa kwiziko eliqhelekileyo lombane le-arc ukwenza intsimbi, ukwenza isilicon, ukwenza iphosphorus emthubi njl.njl.