The quality of different recarburizers is different. For example, there are graphite recarburizers and coal recarburizers. Although they are all recarburizers, they are different in terms of basic characteristics, absorption coefficient, price, advantages and disadvantages. It is not very different, but if applied improperly, it will also affect their carbon-increasing effect.
1. The raw materials of the two recarburizers are different
The graphite recarburizer is made of 2830 degree graphitized artificial graphite, and the coal-based recarburizer is made of anthracite.
2. The basic characteristics of the two recarburizers are different
The graphite recarburizer has the advantages of low sulfur, low nitrogen, low phosphorus, high temperature resistance, and good electrical conductivity. High-quality coal-based recarburizers cannot achieve the desired recarburization effect.
3. The absorption coefficient is different
The absorption coefficient of the graphite recarburizer is above 90%, and the absorption coefficient of the coal-based recarburizer is basically around 70%. This is why the graphite recarburizer can be used with a lower fixed carbon content.
4. The price of recarburizers is also different
Graphite recarburizers are slightly more expensive than coal-based recarburizers, but the overall cost of use is much lower.
5. Different shapes
Graphite recarburizer is a shiny cylinder, and coal recarburizer is block particles.
6. Graphite recarburizer has lower melting point for steel, higher steelmaking temperature and serious combustion, but the absorption coefficient is not high.
Coal-based recarburizers have a high melting point. Although the absorption coefficient is low, it does not burn. It is not inferior to graphite, the price gap is very large, and the number of steel plants is generally very large. From the perspective of cost, this is unacceptable.
7. Graphite recarburizer is suitable for nodular cast iron with strict sulfur requirements, high carbon sequestration and good absorption coefficient, especially suitable for half-ton to 12-ton intermediate frequency furnaces.
8. Products produced with coal-based recarburizers are not only inferior to graphite recarburizers, but also have higher sulfur content, which reduces their output.