Method for evaluating electrode consumption rate
AssigneeDeere & Company
InventorsMaurice P. Roach, Stanley L. Strudthoff
Life of this patent
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Abstract
A method for determining the expected consumption rate of graphite electrodes is disclosed. An electrical signal is applied to a number of electrodes to generate eddy currents therein which are sensed to provide eddy current values. The consumption rate of the electrodes in use in an electric arc metallurgical furnace are measured. A standard eddy current value (with respect to the measured consumption rates) is determined, for example, by plotting the eddy current values and measured consumption rates. Thereafter, eddy current values obtained from other electrodes are compared with the standard eddy current value to determine the expected consumption rate.
Claims10
A method of determining the approximate consumption rate of a plurality of graphite electrodes which comprises:
- applying an electrical signal to a number of the plurality of graphite electrodes to generate eddy currents in said electrodes;
- sensing the generated eddy current to obtain eddy current values;
- using said number of electrodes in an electric arc furnace and measuring the consumption rate of each of the said number of electrodes during said use;
- determining a standard correlation between eddy current values and the said measured consumption rates;
- and
- comparing the eddy currents values obtained from the remaining plurality of graphite electrodes with the standard eddy current correlation value to determine the approximate consumption rate thereof.
A method of testing a graphie electrode for expected consumption rate in an electric arc furnace which comprises:
- applying an electrical signal to a portion of the said graphite electrode to generate eddy currents therein;
- sensing the generated eddy currents to obtain an eddy current value;
- comparing the obtained eddy current value with a standard representing the correlation between eddy current values and consumption rate to determine the expected consumption rate thereof.
Dependencies are inferred from the claim text.