... be widely applied to steel and iron, refractory material, electrode paste and other products.Sell Natural Graphite BriquetteCarbon content: 75 ... iron and steel field, casting etc.Sell Natural Graphite PowderFixed carbon content: 60%, 65%, 70%, 75%, 80%, 85%, ... widely applied to battery carbon rod, steel and iron, casting material, refractory material, fuel, paint, electrode paste and pencil, battery, ...