1. Metallurgical coke carburetor: The large coke commonly used in cupola not only serves the purpose of smelting, but also adds carbon to the metal burden;
2. Calcined coal carbonization agent: mainly produced in Shizuishan, Ningxia and Wuhai, Inner Mongolia. The composition is generally C: 90-93%, S0.3-0.5%. Mainly used in steelmaking enterprises, some casting enterprises use gray cast iron. The disadvantages are low carbon content, slow melting, waste of electrical energy, and large residual amount;
3. Petroleum coke carburetor: mainly produced in Liaoning, Tianjin, and Shandong. Liaoning mainly produces bullet coke, which is not very good for casting. Petroleum coke from Shandong and Tianjin can be used for casting gray cast iron. The composition is generally C: 96-99%; S0.3-0.7%. Mainly used for steelmaking, gray cast iron, brake pads, cored wires, etc;
4. Natural graphite carburetor: mainly natural graphite, with carbon ranging from 65% to 99%, mainly used in steel mills, not suitable for foundries.