half GPC carburant

In the smelting process of iron and steel products, due to factors such as smelting time, holding time, and long overheating time, the smelting loss of carbon in molten iron increases, resulting in a decrease in the carbon content in molten iron, resulting in The carbon content in molten iron does not reach the expected theoretical value of refining. Carbon-containing substances added to make up for the carbon content lost during steel smelting are called carburizers.



There are many materials that can be used as recarburizers for cast iron. Commonly used are artificial graphite, calcined petroleum coke, natural graphite, coke, anthracite and mixtures made of such materials. Carburizers play an important role in carbon replenishment in steelmaking and casting. There are many types of carburizers: petroleum coke carburizers, graphite carburizers, graphitized petroleum coke carburizers and coal These four categories of quality recarburizer. Among them, the most general effect of absorption rate is coal-based carburant. Under normal circumstances, the absorption rate is about 50%-60%. The best carburizer is: graphitized petroleum coke carburant, generally above C98.5 , S0.05 or less, N300PPM or less, absorption rate over 90%, is the best recarburizer in ductile iron. The semi-graphite recarburizer is a relatively cost-effective recarburizer. The sulfur is lower than that of petroleum coke recarburizers, but higher than that of all-graphite recarburizers. The effect is better than that of petroleum coke recarburizers. The effect of the all-graphite recarburizer is slightly worse, but the price is lower than that of the all-graphite recarburizer, and the absorption rate is also a very high product. Both ductile iron and gray cast iron can be used, so its economic benefits are relatively high. Many castings The factory has chosen this semi-graphite recarburizer.

For casting, cast iron, cast steel, castings will have requirements for carbon content, the carburizer, as the name implies, is to increase the carbon content in molten iron, and for example, the commonly used furnace materials in smelting are pig iron, scrap steel, recycled materials, pig iron The carbon content is high, but the purchase price is higher than that of scrap steel. Therefore, increasing the amount of scrap steel, reducing the amount of pig iron, and adding carbon additives can reduce the cost of castings to a certain extent.