1.Usage:used to improve the carbon content in steel-melting and ductile iron foundry 2.Characteristica:high carbon, low sulfur, with stable effect for improving the carbon content, high absorptivity of carbon. 3.Apply:used in electric furnace steel smelting and cast-iron for improving the carbon content Grain size:normal size:0.3-3mm 1-4mm, 1-3mm, 3-5mm, 3-8mm, 5-10mm or per as customer is special requirement.