Graphitized petroleum coke recarburizer is the key to carbon increase in synthetic cast iron, but it is affected by many factors during its use. The editor summarizes the influencing factors of graphitized petroleum coke recarburizer as follows:

1. Particle size of graphitized petroleum coke recarburizer

The particle size of the graphitized petroleum coke recarburizer is different, and its dissolution, diffusion, and oxidation burning rate are also different. In general, graphitized petroleum coke with large particles has a slow dissolution rate and a small burning rate. On the contrary, small particles dissolve quickly and have a large burning loss. Therefore, when choosing the particle size of graphitized petroleum coke, it should be determined according to the size and capacity of the smelting furnace.

2, the temperature of molten iron

The process of graphitized petroleum coke recarburization in the molten iron is the process of its dissolution, diffusion, and absorption in molten iron, and the process of graphitized petroleum coke recarburization is unsteady diffusion.

That is to say, in addition to the carbon concentration, time, temperature, distance, etc. will affect the recarburization effect of the graphitized petroleum coke recarburizer. When the temperature is low, the graphitized petroleum coke recarburizer that is not infiltrated by the molten iron cannot be dissolved or diffused. When the temperature reaches to allow the molten iron to form, the graphitized petroleum coke recarburizer may be immersed in the molten iron to form a recarburizer. Sufficient conditions for carbon. At this time, after the temperature continues to rise, the carbon and oxygen in the furnace will undergo an oxidation reaction. At this time, if the graphitized petroleum coke recarburizer burns, it is not conducive to carbon increase. Pay special attention to temperature control during operation.

3, the position of the graphitized petroleum coke recarburizer in the charge

Graphitized petroleum coke recarburizer is lighter than cast iron. Graphitized petroleum coke with a smaller volume has the same magnetic permeability as cast iron. Therefore, in the initial stage of melting cast iron, graphitized petroleum coke recarburizer is very easy to be affected by electric furnace magnetic field. The influence of “escapes” from the furnace, which affects the environment, and the effect of carbon emission increases. So try to put the graphitized petroleum coke recarburizer in the lower middle part of the furnace.

In summary, I have summarized the influencing factors of the graphitized petroleum coke recarburizer in use, mainly including the particle size of the graphitized petroleum coke recarburizer, the temperature of the molten iron, and the position of the graphitized petroleum coke recarburizer in the charge.

Ralated products: Graphitized petroleum coke