Mafuta a petroleum apamwamba kwambiri amatengedwa mung'anjo ya Acheson kuti apange graphitization ndi kutentha kozungulira 2500-3600ºC. Chogulitsacho chili ndi digiri yapamwamba ya graphitization yokhala ndi nayitrogeni yotsika kuposa 300ppm. Chogulitsachi, chokhala ndi sulpur otsika ndi phulusa, ndi yabwino recarburizer pamafakitale opangira zitsulo ndi zoyambira.