 |
4 Haoyue Road, Taisha Industrial Park, Pingluo County, Ningxia
|
 |
+860952-6693240
+861330952463700 |
 |
uesugijuly@163.com |
 |
www.shunchima.com |
|
|
|
 |
News |
|
|
| Requirements for carburizing agents used in steelmaking |
| 2023-06-14 16:21:11 Number of visits：2438 |
| |
| |
The requirements for carburizing agents used in steelmaking. During the steelmaking process, due to improper charging or decarbonization, sometimes the carbon content in the steel cannot meet the expected requirements, so carbon needs to be added to the molten steel. The commonly used carburetors are carbon pig iron, electrode powder, Petroleum coke powder, carbon powder and coke powder. When smelting medium and high carbon steel grades in converter, petroleum coke with few impurities is used as carburetor. The requirement for carburizing agents used in top blown converter steelmaking is to have a high fixed carbon content, low ash, volatile matter, and impurities such as sulfur, phosphorus, and nitrogen, and to be dry, clean, and of moderate particle size.
There are various types of raw materials and processes for carburetors, including wooden charcoal, coal based charcoal, coke, graphite, etc., with a wide variety of small varieties. A good carbonizing agent generally refers to the graphitization treatment of a carburizing agent. Under high temperature conditions, the arrangement of carbon atoms forms the microscopic morphology of graphite, which is called graphitization. Graphitization can reduce the content of impurities in the carburizing agent, increase the carbon content of the carburizing agent, and reduce the sulfur content. The use of carburetors in steelmaking can significantly increase the amount of domestic scrap steel and reduce the use of pig iron or not.
Using graphite powder as a carburetor with a blowing amount of 40kg/t is expected to increase the carbon content of molten iron from 2% to 3%. As the carbon content of the molten iron gradually increases, the carbon utilization rate decreases. The temperature of the molten iron before carburization is 1600 ℃, and the average temperature after carburization is 1299 ℃. Spraying graphite powder for carbon enhancement generally uses nitrogen as the carrier, but under industrial conditions, compressed air is more convenient. Moreover, the combustion of oxygen in compressed air produces CO, and the heat of chemical reaction can compensate for partial temperature drop. Moreover, the reducing atmosphere of CO is conducive to improving the carbon enhancement effect.
|
| |
| |
|
