What is graphitized petroleum coke recarburizer?

Recarburizers, to put it plainly, the key ingredient is carbon, and the effect is to increase recarburization, but the quality of different recarburizers is also different, such as: high-purity graphite-based, calcined petroleum coke-based, and calcined coal , Pure natural high-purity graphite, waste electrical grade crushed, and particulate remodeling. The main component is carbon. It is doubtful that the higher the carbon content, the lower the basic residue (basic residue refers specifically to ash, volatile matter, etc.) The other is the sulfur and nitrogen components in the ingredients. The effect of sulfur is clearer. The amount of sulfur in pig iron can strengthen the process performance of castings. In recent years, the nitrogen composition has also been widely used by everyone. Research shows that the nitrogen content is too high, resulting in N2 holes, the nitrogen content is too low, the strength of the castings cannot be improved, and the ferrite is too much. Generally speaking, the nitrogen content of the steelmaking furnace is controlled in the middle of 80ppm.

There are many kinds of raw materials for recarburizers, and the production process is also different. There are wooden carbon, raw coal carbon, coke, high-purity graphite, etc., and there are many under various categories. Small type. Recarburizers generally refer to recarburizers that have undergone graphitization. Under high temperature standards, the order of oxygen atoms is the external economic shape of high-purity graphite, so it is called graphitization.

Graphitization can reduce the content of residues in the recarburizer, the carbon content of the recarburizer, and reduce the sulfur content. The recarburizer is applied during forging, which can greatly reduce the amount of used steel and reduce the amount of cast iron or eliminate the need for cast iron.

The feeding method of heating furnace smelting should promote the recarburizing agent together with the recycled waste materials such as waste steel, and the dosage can be selected and added to the surface of the steelmaking furnace. However, it is necessary to prevent large quantities of materials from being added to the steelmaking furnace to avoid excessive air oxidation and the actual effect of carburization is not significant and the carbon content of the castings is insufficient. The amount of recarburizer added depends on the formulation and carbon content of other raw materials.

Different types of pig iron are selected according to different models and specifications of recarburizers. The characteristics of the recarburizer itself selects pure carbon content graphitized chemicals to reduce excessive residues in the cast iron. The selection of suitable recarburizers can reduce the cost of casting products.

The recarburizer is suitable for smelting applications in induction heating furnaces, but the actual applications are also different according to the processing technology regulations. In the smelting of intermediate frequency electric furnace, the recarburizer can be added to the lower part of the heating furnace according to the preparation or carbon equivalent regulations, and the utilization rate can reach 95%; if the carbon amount is not enough to adjust the carbon time-sharing chart, first clean the slag in the furnace, and then Add recarburizer, according to the temperature increase of the molten iron, electromagnetic induction mixing or manual service mixing to melt and absorb the carbon, the utilization rate can be around 90%. If the temperature increase recarburization process is selected, only a part of the recycled waste is melted, and the molten iron When the liquid temperature is low, the recarburizer is added to the molten iron at one time, and the solid recycle waste is used to press it into the molten iron to prevent it from exposing the surface of the molten iron. In this way, the carbon increase of molten iron reaches 1.0%.

Petroleum coke recarburizer can be used for forging steel castings. The composition is generally C: 96-99%; S0.3-0.7%. The key is for ironmaking, steel castings, brake discs, and cored wires. Calcined petroleum coke recarburizer, graphitized recarburizer, recarburizer manufacturer Henan Liugong High Purity Graphite Group Co., Ltd. will give you a detailed introduction: the calcined petroleum coke recarburizer is used after the calcining of raw petroleum coke. The main purpose of calcining is to remove residues, while the calcined petroleum coke recarburizer is graphitized and turned into a graphitized recarburizer to remove sulfur, water, and volatiles.