Method and device for controlling the level of steel in a continuous casting mold

(19)

(11)

EP 1 256 401 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	29.10.2003 Bulletin 2003/44

(43)	Date of publication A2:
	13.11.2002 Bulletin 2002/46

(21)	Application number: 02076761.2

(22)	Date of filing: 03.05.2002

(51)	International Patent Classification (IPC)⁷: B22D 11/20, B22D 11/16, B22D 11/18, G05D 9/12

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

10.05.2001 IT MI20010958

(71)	Applicant: O.R.I. Martin Acciaieria E Ferriera Di Brescia S.p.A.
	20121 Milan (IT)

(72)	Inventor:
	Lombardi, Ernesto 25128 Brescia (IT)

(74)	Representative: De Gregori, Antonella
	Ing. Barzano & Zanardo Milano S.p.A. Via Borgonuovo 10 20121 Milano 20121 Milano (IT)

(54)	Method and device for controlling the level of steel in a continuous casting mold

(57) A method for controlling the level of steel in continuous casting in an ingot mold, wherein there are provided a radioactive detector (17, 18) and a thermal detector (22) in the proximity of a level (19) of the steel fed to an ingot mold (13) by a casting duct (15) wherein in a first initial step for regulating the continuous casting method, the radioactive detector (17, 18) is actuated at a high speed of detection of changes in the level (19) of steel, and in a second step at steady condition, as soon as the start up transient has finished, the high-precision steel level (19) thermal detector (22) is actuated.

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