Mold flux and continuous casting method using the same

Abstract

A mold flux including 20 to 50 wt% of CaO, 20 to 50 wt% of SiO2, 20 wt% or less of Al2O3, 20 wt% or less of Na2O, 10 wt% or less of Li2O, 20 wt% or less of B2O3, and 10 wt% or less of MgO, and a continuous casting method using the mold flux. The quality of products can be improved, since the occurrence of surface cracks of cast pieces is suppressed. Further, since the occurrence of break-out is prevented, it is possible to improve the process stability.

Description

Technical field [0001] The present invention relates to a mold flux and a continuous casting method using the mold flux, and more specifically, to a continuous casting method using molten mold flux. Background technique [0002] In a general steelmaking method, the pretreatment process of molten iron, the converter refining process, the secondary refining process, and the continuous casting process are sequentially performed. [0003] Such as figure 1 As shown, in order to manufacture castings (i.e. general terms for slabs, billets, blooms, shaped billets, etc.) through a continuous casting process, molten steel is supplied from a ladle, and then the molten steel passes through the tundish for storing molten steel 1, an immersion nozzle 2 and crystallizer 3. Then, the molten steel is cooled in the mold 3 by the cooling effect of the mold 3, and a solidified shell 5 is formed. The solidified shell 5 formed by cooling molten steel is guided by a guide roller provided below the mol...

AI Technical Summary

Problems solved by technology

However, more mold flux is mixed into the molten steel, and the average amount of heat transferred decreases

As a result, lead to breakout

Images