Semi GPC (SGPC) yog los ntawm cov txheej rwb thaiv tsev ntawm lub cub tawg acheson. Qhov kub ntawm graphitization yog nyob rau hauv qhov ntau ntawm 1700-2500ºC. Nws yog ib qho khoom lag luam graphitization kub nruab nrab. Nws yog recarburizer pheej yig nrog cov pa roj carbon ruaj khov siab, cov ntsiab lus sulfur qis dua, qhov nrawm nrawm thiab qhov nrawm nqus siab.