graphitized petroleum coke low sulphur

Graphitized petroleum coke low sulphur material introduction

Graphitized petroleum coke low sulphur is used in casting, which can greatly increase the amount of scrap, reduce the amount of pig iron or eliminate the need for pig iron. At present, most graphitized petroleum coke low sulphur are suitable for electric furnace smelting, and a small part of graphitized petroleum coke low sulphur with a particularly fast absorption rate is used in cupolas. The charging method of electric furnace smelting should be to put graphitized petroleum coke low sulphur into the molten steel along with the scrap steel and other charge materials. Small doses can be added to the surface of the molten iron. However, it is necessary to avoid large batches of materials in the molten iron to prevent excessive oxidation and the occurrence of insignificant recarburization effects and insufficient carbon content of the castings. The amount of graphitized petroleum coke low sulphur added is determined according to the ratio of other raw materials and the carbon content. For different types of cast iron, choose different types of graphitized petroleum coke low sulphur according to your needs. The characteristics of graphitized petroleum coke low sulphur is to choose pure carbon-containing graphitized materials to reduce excessive impurities in pig iron. Choosing appropriate graphitized petroleum coke low sulphur can reduce the production cost of castings.

In the smelting process, due to improper ingredients or charging and excessive decarburization and other reasons, sometimes the carbon content in steel or iron does not meet the expected requirements. At this time, it is necessary to add carbon to the steel or molten iron. The main substances usually used to increase carbon are anthracite powder, carbonized pig iron, electrode powder, petroleum coke powder, pitch coke, charcoal powder and coke powder. The requirement for graphitized petroleum coke low sulphur is that the higher the fixed carbon content, the better, and the lower the content of harmful impurities such as ash, volatile matter and sulfur, the better, so as to avoid polluting steel. The smelting of castings uses high-quality graphitized petroleum coke low sulphur after high-temperature sintering of petroleum coke containing very little magazine, which is an important part of the recarburization process. The quality of graphitized petroleum coke low sulphur determines the quality of molten iron, and also determines whether a good graphitization effect can be obtained. In short, reducing the shrinkage of molten iron graphitized petroleum coke low sulphur plays a pivotal role.

When smelting all steel scrap in an electric furnace, it is preferred to use graphitized petroleum coke low sulphur that has undergone graphitization treatment, and graphitized petroleum coke low sulphur that has undergone high-temperature graphitization treatment. Only the carbon atoms can change from the original disorderly arrangement to the flake arrangement, flake graphite It can become a good core of graphite nucleation to facilitate graphitization. Therefore, we should choose graphitized petroleum coke low sulphur that has undergone high-temperature graphitization. Because of the high temperature graphitization process, the sulfur content is reduced by the escape of generated SO2 gas. Therefore, high-quality graphitized petroleum coke low sulphur contains very low sulfur content, w(s) is generally less than 0.05%, and better w(s) is even less than 0.03%. At the same time, this is also an indirect indicator for judging whether it has been subjected to high-temperature graphitization treatment and whether the graphitization is good. If the selected graphitized petroleum coke low sulphur is not subjected to high temperature graphitization treatment, the nucleation ability of graphite will be greatly reduced, and the graphitization ability will be weakened. Even if the same carbon content can be achieved, the result is completely different.