Product Description Using calcined anthracite coal carburizing agent and cast iron using carburizing agent steel, and other materials are also useful for adding to the carburant carburant is applied, steelmaking, iron carbon materials. High quality carburizing agent is essential to producing high quality steel auxiliary additives. Usage: For 1-5 T furnace: - while a small amount molten iron in the furnace, - or with some molten iron remained, add the carbon additive one-time, - then add the other material. which can make carbon additive fully absorbed. For greater than 5 T furnace: - mix proper carbon additive with charging material as suggested first, - and then along with the increase of charging material gradually, - that is, before the molten metal rising up to about 2/3 height of furnace, - all carbon additive shall be added. It guarantees sufficient melting & absorbing time before molten metal out, and improves the absorption of carbon.