System And Method For Determining Temperature Of A Metal Melt In An Electric Arc Furnace
AssigneeABB Schweiz AG
InventorsXiaojing Zhang, Jan Erik Eriksson, Michael Lundh, Conny Svahn
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Abstract
A system and a method for determining/predicting a tapping time for a metal melt in an electric arc furnace (EAF), at least one electrode is provided for melting the metal melt until it reach a target tapping temperature, the EAF further includes a slag and smoke layer on the surface of the metal melt, wherein an electromagnetic stirrer is provided for stirring the metal melt.
Claims6
A method for determining/predicting a tapping time for a metal melt in an electric arc furnace (EAF), wherein at least one electrode is provided for melting the metal melt until it reach a target tapping temperature, wherein the EAF further comprises a slag and smoke layer on the surface of the metal melt, wherein an electromagnetic stirrer is provided for stirring the metal melt, the method comprising
- a) supplying a power to the electrode in order to melt a scrap to a metal melt,
- b) electromagnetic stirring the metal melt in the EAF,
- c) arranging a lance unit dedicatedly configured to including an inert gas,
- d) blowing away the slag and smoke from the surface of the metal melt by the dedicatedly arranged lance unit,
- e) non-contactingly measuring a temperature of the metal melt,
- f) receiving the measured temperature,
- g) calculating a temperature profile based on the received temperature,
- h) estimating/predicting a tapping temperature at a time point based on the calculated temperature profile, and
- i) determining a tapping time based on the estimated temperature, the target tapping temperature and the power supplied to the electrode.
Dependencies are inferred from the claim text.