The high quality carburant is just the carburant through the graphitization, under the high temperature, the arrangement of carbon atoms appear to the state of graphite, so call it graphitization. The graphitization can cut down the content of the impurity in carburant, improve the content of carbon in carburant and cut down the content of sulfur.
In the process of smelting, because of improper ingredients or loading and excessive decarburization, sometimes will cause the content of carbon in steel could not reach the expected requirements, at this time need to add the carburant to the molten steel, the common used carburant are petroleum coke, carbon-increasing pig iron, electrode powder, charcoal powder and coke powder. When add the carburant into foundry, it can significantly increase the amount of steel scrap, and decrease the amount of pig iron or even use no pig iron.
The function:
For the foundry, cast iron, cast steel, castings all will have the request for the content of carbon, so the carburant is the one to increase the content of carbon in molten steel, and for example, In the process of smelting, the general used furnace charge are pig iron, steel scrap and back furnace charge, for the pig iron, the content of carbon is high, but the purchase price is much higher than the steel scrap, so need to throw into much more steel scrap, and to cut down the quantity of pig iron, and at this time, you can add the carburant to meet the carbon content required. Adding the carburant can cut down the cost for the castings.