The various processes used in the furnace of the intermediate frequency furnace are also very important to the service life of the furnace. Improper operation may reduce the service life of the furnace. Therefore, the following points should be noted during use.

1. In the process of use, when it is necessary to stop the furnace for a long time due to malfunctions, etc., the molten iron in the furnace should be emptied to avoid the lining of the lining when the molten iron condenses, and the lining is damaged; The molten iron has been condensed. When it is not possible to judge whether the lining is intact, the furnace should be dismantled for safety. 
2. When cooling the furnace, in order to avoid quenching of the lining, the blast furnace should be cooled. At the same time, in order to avoid cracks in the lining during the cooling process, the furnace cover should be covered to make the lining uniform even when cooling. Guarantee the service life of the furnace. 
3. Vertical cracks are inevitable due to furnace cooling. Therefore, when the furnace is started, the furnace should be cooled at a low temperature and then melted, so that the crack can be firstly closed to prevent the crack from further spreading when the molten iron melts. 
4, the furnace should pay attention to observe the furnace condition during the use of the furnace, observe the furnace condition is a kind of protection of the furnace, every 3 days to measure the bottom of the furnace, every furnace should observe the furnace wall every day, thus ensuring the safety of the furnace lining.

5. Maintain and maintain the medium frequency furnace equipment. If the coil is cleaned frequently, the debris on the coil is cleaned to prevent the coil from breaking down, thus avoiding the furnace dismantling caused by equipment failure, which effectively improves the service life of the concrete.

6. Since the sintered layer of the new furnace is thin, the use process of the new furnace is very important. The new furnace effluent of a furnace should an 50% i.e. feed melt, so that the lining can be avoided after the addition of all the water quench defects such as cracks occur; new continuous melting furnace as much as possible, to avoid interruption caused by hot and cold smelting The crack should generally be continuously melted for 1 week; when using the new furnace, avoid the strong impact on the bottom and the furnace wall when cutting, and avoid the lining peeling and cracking which occur under strong impact. Therefore, in order to obtain the age of the furnace, the furnace technology in the early stage of the furnace should be completed.

7. Try to avoid high temperature melting during the smelting process. In the high temperature state, the lining will react with the molten iron, as follows: SiO2+2C → Si+2CO ,

The higher the temperature, the higher the C and the lower the Si , the erosion of the lining will be intensified, especially in the new furnace. Therefore, the high temperature is avoided at the temperature of the outlet water during the melting, and the outlet temperature is 1490 °C ~ 1540 °C, but In the smelting process, it is generally controlled at 1490 °C ~ 1520 °C; it is worth mentioning that after the water is discharged, the electricity is kept at a lower temperature, and when the water is ready to be discharged, it is raised according to the temperature of the previous water.

Temperature, which can reduce the erosion of high temperature molten iron on the furnace lining, prolong the service life of the lining and reduce power consumption, which is a good method to improve the furnace age and reduce power consumption. 
8. Avoid overheating the lining. Because the heating rate of the intermediate frequency furnace is quite fast, when the smelter pays no attention, the furnace material will have a "bridge" phenomenon, and the lining will have a local high temperature or even exceed the refractoriness of the lining, which may cause the lining to melt and be damaged; or when the furnace is in front of the furnace When the work is not paying attention, when the melting temperature is too high, the lining may be melted and eroded; this will greatly reduce the service life of the lining. Therefore, it is necessary to pay attention to it during the melting process. For example, the melting work should be diligent and the furnace work. Keep the temperature of the molten iron at any time according to the color of the molten iron to ensure the safety of the lining.