Tundish mold powder composition and function

Source: | Author:ChangXing Refractory | Published time: 1616 days ago | 886 Views | Share:

casting mold powder composition and function

A mold powder characterized in that, a weight ratio of CaO to SiO2 in the casting powder is within a range of 0.50 to 1.20, the mold powder contains one or two or more species selected from a group consisting of oxides, carbonates, or fluorides of alkali metals, alkaline earth metals, or other metals, and 0.5 to 5 percent by weight of carbon powder, Li2O content is within a range of 1 to 7 percent by weight, F content is within a range of 0.5 to 8.0 percent by weight, crystallization temperature is within a range of 1000 to 1200 DEG C, surface tension at 1300 DEG C is 250 dyne/cm or more, and a relationship between viscosity eta (poise) at 1300 DEG C and casting speed V (m/min) satisfies a range represented by an expression 6.0 </= eta V </= 100.0. By the present invention, there is provided a casting powder which enables stable casting by reducing the likelihood of powder entrapment into the mold without giving rise to surface crack when casting with a thin-slab continuous caster.

The mainly function of casting powder is protecting molten steel from oxidizing, and our factory made casting mold powder size is according to your furnace volume and steel grade.