I-graphite petroleum coke isetshenziswa kakhulu ezinqubweni zokuphonsa ezikhethekile njenge-recarburiser, ikakhulukazi ekwenzeni imikhiqizo yekhwalithi ephezulu ye-ductile ne-grey cast iron enokuqukethwe kwesibabule okulawulwa ngokunembile, kanye nakwezinye izinhlelo zokusebenza.