Can graphite carbon balls be used as recarburizers in the steelmaking industry?

Graphite carbon balls can be used as recarburizers when used in the steelmaking industry. Carburizing uses a wide range of carbonaceous materials, including artificial graphite, petroleum coke, metallurgical coke, and natural graphite. Reasonable application of steel-making carbon balls can improve the properties of steel. Under vacuum conditions, the deoxidation capacity of carbon will be greatly improved.

graphite ball

Steel mills use recarburizers to recarburize molten steel. Commonly used recarburizers include pitch coke recarburizer, manganese-carbon alloy ball recarburizer, carbon powder cored wire recarburizer, and so on. However, the above recarburizers all have certain problems:

1. The physicochemical index of pitch coke recarburizer is that carbon is greater than or equal to 98, and the particle size is between 5 and 15mm. It is added to the ladle together when the molten steel is tapped, and the carbonization of the molten steel is realized by the high temperature dissolution of the molten steel. The main disadvantage of the recarburizer is its small specific gravity, only 0.6g/cm3, while the specific gravity of molten steel reaches 7.8g/cm3. Therefore, after the recarburizer is added to the molten steel, it floats to the surface of the molten steel and enters the slag and burns.

2. Toner cored wire recarburizer is to wrap the toner in the steel belt. Although the composition is uniform, the writing can achieve accurate carbonization, but due to the light weight of the cored wire, it needs to be greatly increased in molten steel. It takes a long time to meet the production demand.

Graphite powder recarburizer

The graphite ball increases the overall density and ensures the absorption rate of carbon into the molten steel. It mixes a certain amount of carbon materials in a certain proportion, and shapes the materials, so that the carbon materials can quickly enter the interior of the molten steel, so that the recarburizer for steelmaking is scattered and melted in the molten steel, and will not cause The temperature loss of molten steel is achieved, so that the graphite ball can save the consumption of the alloy used in the re-steeling process and reduce the cost of steel making while achieving stable and efficient carbon increase.

The demand for graphite balls in steelmaking is increasing day by day. In the process of use, graphite balls are further improving the carbon absorption rate. Carburizing is added when molten steel is stirred, and its carbon absorption rate is basically maintained between 85%-95%; when the steelmaking furnace is released, it is maintained between 70%-85%. For this reason, the structure of the carburizer needs to be adjusted Further improvements are made in order to achieve further carbon-increasing effects.

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