Scope of operation: primary coating curing furnace, fine coating curing furnace, waste gas incinerator.
Process Description: the steel strip comes out of the roller coating machine and enters the curing furnace after passing through a section of leveling area. The wet coating of the steel strip forms a certain thickness of dry film after dehydration and drying in the hot blast furnace.
Site management standard: before shift: remove the floating dirt in the curing furnace, start the circulating fan and exhaust fan for air cleaning, clean the combustible gas concentration alarm device, and approve the set value of the lower limit of explosion concentration. Confirm that the system interlock of combustible gas concentration alarm and curing furnace heating device is effective, and raise the temperature in sections according to the heating curve of primary and fine coating curing process. Wash the incinerator and raise the temperature to the set value. After shift: after the heater stops working, the circulating fan and exhaust fan still work for a period of time to cool the furnace and remove the waste gas in the furnace and clean the surrounding area.
Curing furnace: the temperature control curve in the furnace is directly related to the process conditions such as steel strip thickness, coating type, coating thickness and unit speed. Although the preset value can be made according to experience, the accurate value should be corrected according to the dry film performance test. Therefore, in the production process, the coating should be cured regularly and cooled to room temperature, and then the on-line MEK and pencil hardness test should be conducted, Adjust furnace temperature curve at any time.
Incinerator: during the production process, check the burning situation at any time, that is, judge the burning effect by furnace temperature and pressure, and use the valve in front of the chimney to adjust. In addition, the pressure balance point between the curing furnace and the incinerator should be well controlled through the opening and closing of the air pipe ram for waste gas transmission.