Method for preventing steel penetration between plate surfaces of submerged nozzle quick-change mechanism

Abstract

The application discloses a method for preventing steel penetration between plate surfaces of a submerged nozzle quick-change mechanism, 1) under the premise of stable refractory material quality, the nozzle baking method is changed, rapid baking is adopted during baking, the total baking time is controlled to be 1.5-2.5 h, the temperature reaches the range of 1000-1100 DEG C, and the nozzle temperature before use is ensured to be greater than or equal to 950 DEG C; 2) argon is used for sealing between plates of the submerged nozzle quick-change mechanism in a tundish, and the argon flow is controlled to be 10 L / min; 3) a heat insulation steel plate is installed at the lower part of the submerged nozzle quick-change mechanism, 4) the inspection and maintenance of the submerged nozzle quick-change mechanism are well done, all threads and machining holes of a main frame are inspected, and compressed air is used for cleaning; the main frame cooling channel is inspected by using compressed air, and if the channel is blocked, the channel is required to be thoroughly cleaned; 5) the compression force of the spring must be tested after the quick-change mechanism is taken offline each time.