Mfundo zazikuluzikulu za graphite petroleum coke ndi izi: chinyezi pansi pa 0.5%, sulfure pansi pa 0.05%, phosphorous pakati pa 0.04-0.01, nayitrogeni wa hydrogen pansi pa 100% ppm. mkulu mpweya zili tinthu kukula ndi zolimbitsa, porosity adzakhala ndi lalikulu, mayamwidwe liwiro mofulumira, ndi mankhwala zikuchokera ndi koyera, mlingo mayamwidwe adzakhala mkulu. Tinthu kukula 0-5mm, 1-5mm, 0-10mm, etc., akhoza kukonzedwa malinga ndi zofunika kasitomala
