CONTINUOUS CASTING METHOD FOR PREVENTING CLOG BETWEEN UPPER NOZZLE AND SUBMERGED ENTRY NOZZLE AND ECCENTRIC SLOT NOZZLE THEREOF

摘要

PURPOSE: A continuous casting method and its eccentric slot nozzle are provided to prevent a clog of refractories by accumulating non-metal refractories and to minimize blow hole defects by minimizing argon gas. CONSTITUTION: In controlling an amount of melted steel from a tundish to a mold through a slide gate, an eccentric slot nozzle is additionally installed in an outlet of the tundish. Non-metal refractories are flown through the center of the melted steel stream by maximizing a whirlpool rotating stream. Thereby, a clog by the non-metal refractories between an upper nozzle and a submerged entry nozzle is prevented. A mixing of fine bubbles is minimized by minimizing argon gas. Thereby, blow hole defects are minimized. A mixing of a tundish slag is prevented by suppressing a generation of a vortex. The yield rate is improved by minimizing a remaining amount of the tundish.