The difference between graphite carburizing agents and coal based carburizing agents

Common carburants include graphite carburants, Petroleum coke carburants and coal based carburants. Many people believe that they are the same. Shunchi manufacturer of carburants for many years, Baiyun Carbon will briefly describe the difference between graphite carburants and coal based carburants:

1. The characteristics of graphite carburetors and coal based carburetors are different: graphite carburetors have characteristics such as low sulfur, low nitrogen, low phosphorus, high temperature resistance, and good conductivity. Coal based carburetors do not have these characteristics, which is why coal based carburetors cannot achieve the expected carburetion effect at that time.

2. The raw materials are different: the graphite carburetor is processed from artificial graphite that has been graphitized at 2830 ℃, and the coal based carburetor is calcined from Anthracite.

3. Different appearance: graphite carburetor is a shiny cylinder, while coal is a block like granular material.

4. The difference in absorption rate of carburizing agents: The absorption rate of graphite carburizing agents is above 90%, while the absorption rate of coal is generally around 70%. This is also why graphite carburizing agents with lower fixed carbon content can also meet the usage requirements.

5. The cost of carburetors is also different: graphite carburetors have slightly higher costs compared to coal based carburetors, but the overall usage cost is much lower.

6. Products made with coal based carburetors not only have lower strength than graphite carburetors, but also have a higher sulfur content, making it difficult to produce good products.

7. Graphite carburetor is suitable for ductile iron with strict sulfur requirements, with high fixed carbon content and good absorption rate. Very suitable for intermediate frequency furnaces ranging from half a ton to 12 tons.

8. On the surface of steel refining, the melting point of graphite carburizing agent is lower, and the temperature of steelmaking is higher. This causes severe burning damage to the graphite carburizing agent, but the absorption rate is not high. The melting point of coal based carburetor is high, although the absorption rate is low, it does not burn out, and the product is not inferior to graphite. The cost difference is also very large, and the amount used in steel mills is generally large. Considering the cost, it cannot be accepted.

From the above points, it can be seen that there are significant differences between different carburetors, but they all have their own advantages. Regardless of which one is chosen, it is a product with good carburetion effect.