Method for continuous casting of steel

Claim 2

In a method of continuous casting of steel using a mold for casting a curved ingot comprising the step of applying different casting powders to the mold in different portions thereof for control of the heat transfer conditions along and into the mold wall, the powders selected for differing as to melting point and viscosity after melting, a lower melting powder being applied in the vicinity of the wall along the inner curved contour of the ingot.

Claim 3

In a method for continuous casting of a tubular steel ingot, using a mold with a centrally disposed mandrel, and providing a higher melting casting powder in the vicinity of the mandrel and a lower melting powder in the vicinity of the mold proper, for control of relative heat transfer respectively into the mandrel and the mold proper.

Claim 4

In a method for continuous casting of a tubular steel ingot, using a mold with a centrally disposed mandrel, and providing a higher melting casting powder in the vicinity of the mandrel and a lower melting powder in the vicinity of the mold proper, for control of relative heat transfer respectively into the mandrel and the mold proper.

Claim 5

In a method for continuous casting of steel using a mold having first and second wall portions but a uniform surface level of molten steel therein, applying a first casting powder to the mold to act in the vicinity of the first wall portion; applying a second casting powder to the mold having a higher melting point than the first powder and melting in the vicinity of the second wall portion, so that the heat transfer into the second wall is enhanced due to higher viscosity of the molten second powder as flowing along the second wall portion; and maintaining the first casting powder separated from the second casting in the surface level of the molten steel in the mold, the ingot growing underneath the surface level unimpeded by the slag separation in the surface level.

Claim 6

In a method for continuous casting of steel using a mold having first and second wall portions but a uniform surface level of molten steel therein, applying a first casting powder to the mold to act in the vicinity of the first wall portion; applying a second casting powder to the mold having a higher melting point than the first powder and melting in the vicinity of the second wall portion, so that the heat transfer into the second wall is enhanced due to higher viscosity of the molten second powder as flowing along the second wall portion; and maintaining the first casting powder separated from the second casting in the surface level of the molten steel in the mold, the ingot growing underneath the surface level unimpeded by the slag separation in the surface level.

Claim 7

The method as in claim 3, including the step of using a refractory divider dipping into the surface of the bath of the molten steel for separating two differently melting casting powders.

Claim 8

The method as in claim 4, the divider selected from ceramic material.

Claim 9

The method as in claim 1, comprising the step of using differing casting powders having different content of hiGh melting oxides.

Claim 10

The method as in claim 1, comprising the step of using particular, liquidity enhancing components in the low melting casting powder.

Claim 11

In a method as in claim 1, including the step of using a divider for maintaining the slag powders separated in the surface level of steel in the mold.

Claim 12

In a method as in claim 2, including the step of using a divider for maintaining the slag powders separated in the surface level of steel in the mold.