What points should be paid attention to when using furnace lining

Luoyang Quantong Kiln Industry's furnace linings share the various processes of the furnace's use process, which are also important to the service life of the furnace. Improper operations may reduce the service life of the furnace. Therefore, the following points should be paid attention to during use.

(1) Because the sintering layer of the new furnace is thin, the use process of the new furnace is very important. The first furnace of the new furnace should produce 50 percent of the water, that is, the charging and melting, so as to avoid the lining of the furnace being quenched and cracked by charging after all the water is discharged. and other shortcomings; the new furnace should be continuously smelted as much as possible to avoid cracks caused by intermittent smelting and hot and cold, and generally it should be continuously melted for 1 week.

(2) Try to avoid high temperature smelting during the smelting process. In the high temperature state, the lining will react with the molten iron in the crucible, as follows: SiO2 plus 2C→Si plus 2CO, the higher the temperature, the higher the C, the lower the Si, and the lower the lining. The corrosion damage will be aggravated, especially in the new furnace, so try to avoid high temperature while ensuring the water temperature during melting.

(3) Avoid overheating of the furnace lining. Because the heating rate of the intermediate frequency furnace is appropriately fast, when the smelter does not pay attention, the "bridging" phenomenon of the charge will appear and the furnace lining will have a local high temperature or even exceed the refractoriness of the furnace lining, which may melt the furnace lining and cause Corrosion.

(4) During the use process, when the furnace needs to be shut down for a long time due to faults and other reasons, the molten iron in the furnace should be emptied to avoid the furnace lining being damaged due to the cracking of the furnace lining when the molten iron condenses.

(5) Use clean charge as much as possible during use, especially when the furnace is new.

(6) When the furnace is stopped for cooling, in order to avoid the sudden cooling of the furnace lining, the furnace should be cooled in an empty furnace. At the same time, in order to prevent the furnace lining from cracking due to the excessive temperature difference between the upper and lower sides of the furnace lining during the cooling process, the furnace cover should be covered to make the furnace lining even up and down during cooling. Then ensure the life of the furnace.

(7) Since vertical cracks inevitably appear when the furnace is cold, when the cold furnace is started, the furnace should be baked at a low temperature first, and then melted, and then the cracks can be bridged first, so as to avoid the cracks entering the cracks when the molten iron melts and further expanding the cracks.

(8) During the use of the furnace, attention should be paid to the investigation of the furnace condition. Investigating the furnace condition is a kind of maintenance for the furnace. The furnace bottom is measured every 3 days, and the furnace wall should be investigated for each furnace every day, so as to ensure the safety of the furnace lining.

(9) Maintain and maintain the electric furnace equipment, such as frequently purging the coil, cleaning the sundries on the coil to avoid the breakdown of the coil, and then avoiding the dismantling of the furnace due to equipment failure, effectively improving the service life of the crucible.