... % maximum size :0-1mm,1-5mm,5-10mm graphitized petroleum coke in China, Our Plant “Liaoyang Shoushan Carbon Factory Usd to ... 17 years. now we have shifed to produce Graphitized petroleum coke”GPC” as recarburizer for the steel making Our current production ... has a dark gray to black, flat appearance. Manufactured from calcined petroleum c es, and graphitized at temperatures above 2700 deg ...