Baking method of steelmaking tundish permanent layer after overhaul
A baking method and permanent layer technology, which are applied in casting melt containers, metal processing equipment, casting equipment, etc., can solve the problems of wasting energy, surface peeling, and unfavorable baking quality of the permanent layer, and achieve good crack resistance, Smooth surface effect
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Embodiment 1
[0018] The baking method after the overhaul of the permanent layer of the 300-ton converter steelmaking tundish, the steps:
[0019] 1) Exclude the free water stage in the permanent layer after overhaul of the tundish: heat the permanent layer of the tundish after overhaul from room temperature 16°C to 110°C, control the heating rate to 0.2°C / min, and the heating time to 470 minutes; and Insulated at 110°C for 48.5 hours; the free water weight percentage content is 0.31%;
[0020] 2) The stage of removing the crystal water in the permanent layer: the temperature is raised to 330°C at a heating rate of 0.45°C / min, and the heating time is 489 minutes; the holding time at 330°C is 49.5 hours; the weight percentage of crystal water 0.12%;
[0021] 3) Soaking stage for the permanent layer: raise the temperature to 635°C at a heating rate of 0.68°C / min, and the heating time is 450 minutes; the holding time at 635°C is 48 hours;
[0022] 4) The stage of baking the permanent layer: ...
Embodiment 2
[0026] The baking method after the overhaul of the permanent layer of the 250-ton converter steelmaking tundish, the steps:
[0027] 1) Eliminate free water in the permanent layer of the tundish after overhaul: heat the permanent layer of the tundish after overhaul from room temperature 23°C to 150°C, control the heating rate to 0.25°C / min, and the heating time to 508 minutes; and Insulated at 150°C for 48.5 hours; the free water weight percentage content is 0.42%;
[0028] 2) The stage of removing the crystal water in the permanent layer: the temperature is raised to 345°C at a heating rate of 0.37°C / min, and the heating time is 527 minutes; the holding time at 345°C is 49 hours; the weight percentage content of crystal water 0.16%;
[0029] 3) Soaking stage for the permanent layer: raise the temperature to 600°C at a heating rate of 0.56°C / min, and the heating time is 455 minutes; the holding time at 600°C is 49.5 hours;
[0030] 4) The stage of baking the permanent layer:...
Embodiment 3
[0034] The baking method after the overhaul of the permanent layer of the 300-ton converter steelmaking tundish, the steps:
[0035] 1) Exclude the free water stage in the permanent layer after the overhaul of the tundish: heat the permanent layer of the tundish after the overhaul from room temperature of 28°C to 195°C, the heating rate is controlled at 0.35°C / min, and the heating time is 477 minutes; and Insulated at 195°C for 48.5 hours; the free water weight percentage content is 0.2%;
[0036] 2) The stage of removing the crystal water in the permanent layer: the temperature is raised to 360°C at a heating rate of 0.39°C / min, and the heating time is 423 minutes; the holding time at 360°C is 48.2 hours; the weight percentage of crystal water 0.18%;
[0037] 3) Soaking stage for the permanent layer: the temperature is raised to 660°C at a heating rate of 0.6°C / min, and the heating time is 423 minutes; the holding time at 660°C is 48.6 hours;
[0038] 4) Bake the permanent ...
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