结晶器密封绳在炼钢开浇前使用。

Crystallizer sealing rope is used before casting process.

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长水口密封碗高温性能好，在开浇后高温下不粉化、不粘附；

Elongated nozzle sealing bowl has better resistance to high temperature. There is no pulverization and no adhesion after casting.

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但连铸开浇阶段由于浇铸状态的不稳定，会严重恶化头坯洁净度。

But, head slab cleanliness is seriously deteriorated by the unsteady casting condition at casting start stage.

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