The Specific Difference Between Graphite Recarburizer And Coal-based Recarburizer

1. The raw materials of the two recarburizers are different: the graphite recarburizer is made of graphitized petroleum coke that has been graphitized at a high temperature of 3000 degrees, and the coal-based recarburizer is made of anthracite calcined.

2. The basic characteristics of the two recarburizers are different: the graphite recarburizer has the advantages of high carbon, low ash, low volatility, low sulfur, low nitrogen, low phosphorus, high temperature resistance, and good electrical conductivity. The above-mentioned advantages are not provided by the coal-based recarburizer, which is why graphitized recarburizers are used in the production of high-end castings.

3. The absorption rate of recarburizer is different: the absorption rate of graphite recarburizer is above 90%, and the absorption rate of coal is basically about 70%. This is the reason why the graphite recarburizer has much better carburizing cost permfomance than the coal-based recarburizer on the per ton melton iron.

4. In steelmaking, generally, crude steel billets do not have high requirements on the crystal form of the tissue body, and the price of coal-based recarburizers is low. Although the carburizer using amount of molten steel per ton is very small, but the huge steel output of the steel mill results in a very high amount of recarburizers. Considering the cost, steel mills generally use coal-based recarburizers for smelting crude steel billets.

5. As for the ductile iron with strict requirements on sulfur, only graphite recarburizer can provide a high-quality carbon source that meets the requirements of metallographic level. Graphitized recarburizer has high fixed carbon content, low sulfur, low nitrogen, and good absorption rate. It is especially suitable for intermediate frequency furnaces from half a ton to 12 tons.