Patent ID: 11890671
Assignee: JFE STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  G | IPC B  G

Claim 0:
1. A control method for a continuous casting machine, comprising:
estimating, by an on-line real-time system, a flow state of molten steel in a mold by using:
an operation condition of a continuous casting machine, and
temperature data on the molten steel in the mold;

calculating, by the on-line real-time system, at least one molten steel flow index based on the estimated flow state of the molten steel, the at least one molten steel flow index being a factor of mixing of an impurity into a casting inside the mold; and
controlling the operation condition of the continuous casting machine such that the at least one calculated molten steel flow index is within an appropriate range,
wherein the at least one molten steel flow index includes a maximum value of molten steel surface flow velocities in the mold, an area of a region where a solidification interface flow velocity is equal to or less than a predetermined value, and a maximum value of a molten steel surface turbulence energy, and
the maximum value of the molten steel surface turbulence energy is calculated according to formulas (I) and (II) below:

k=(½)·Ui2  (I)

U=Uave+Ui  (II)

where k is turbulence energy, U is an instantaneous value of a flow velocity of a fluid in a spatial position, Uave is a time average value of the flow velocity of the fluid in the spatial position, and Ui is a deviation from a time average value of the flow velocity of the fluid in the spatial position.