Products Description
Natural graphite can be divided into two categories: flake graphite and microcrystalline graphite.
Microcrystalline graphite has a high ash content and is generally not used as a carburizer for cast iron.
There are many varieties of flake graphite: high-carbon flake graphite needs to be extracted by chemical methods, or heated to a high temperature to decompose and volatilize the oxide, which is not much flake graphite production, high price, and generally not as a carburizer; Low carbon flake graphite in the ash content is high, should not be used as a carburizer; Medium carbon graphite is mainly used as a carburizer, but the amount is not much.
Among the above-mentioned carburizing agents, the best quality is artificial graphite.
The main raw material for the manufacture of artificial graphite is powdered high-quality calcined petroleum coke, in which asphalt is added as a binder, and a small amount of other auxiliary materials are added. After various raw materials are combined, they are pressed into shape, and then treated in a non-oxidizing atmosphere of 2500 ~ 3000 ° C to make it graphitized. After high temperature treatment, ash, sulfur, gas content are greatly reduced.
Due to the high price of artificial graphite products, the commonly used artificial graphite carburizer in the foundry is mostly recycled materials such as chips, waste electrodes and graphite blocks in the manufacture of graphite electrodes to reduce production costs.
When smelting ductile iron, in order to make the metallurgical quality of cast iron, the carburizer should be the first choice of artificial graphite.
Hot Tags: graphitized carburizer, China graphitized carburizer manufacturers, suppliers, factory, Graphitized Recarburizer, Column carburizer, Petroleum Coke Carbonization Agent, Graphitized Carburizer
