Method for operating alternating-current electric arc furnace, device for performing method, and alternating-current electric arc furnace having such device
AssigneeSiemens Aktiengesellschaft
InventorsThomas Matschullat, Detlef Rieger
Life of this patent
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Abstract
During operation of an alternating-current electric arc furnace, which has at least one electrode for producing a melt, vibrations are measured at a wall of a furnace vessel, whereby a slag height of the melt is determined. A rapid reaction to the change in the slag height is made possible by adjusting the arc length of the at least one electrode in the case of deviations of a measured actual value of the slag height from a target value.
Claims20
1-17. (canceled)
A method for operating an alternating-current electric arc furnace having at least one electrode for producing a melt in a furnace vessel, comprising:
- measuring vibrations at a wall of the furnace vessel;
- determining a slag height of the melt based on the vibrations measured;
- and
- issuing, when a measured actual value of the slag height deviates from a target value, at least one of control signals and regulating signals to adjust an arc length of the at least one electrode.
A device for controlling operation of an alternating-current electric arc furnace having at least one electrode for producing a melt in a furnace vessel, comprising:
- at least one structure-borne sound sensor configured to acquire vibrations at a wall of the furnace vessel;
- a processing unit configured to calculate an actual value of a slag height in the furnace vessel;
- and
- a control or regulating unit configured to adjust an arc length of the at least one electrode in the case of deviation of the actual value of the slag height from a target value.
An alternating-current electric arc furnace, comprising:
- a furnace vessel having a wall;
- at least one electrode configured to produce a melt in the furnace vessel;
- and
- a control device, including
- at least one structure-borne sound sensor configured to acquire vibrations at the wall of the furnace vessel;
- a processing unit configured to calculate an actual value of a slag height in the furnace vessel;
- and
- a control or regulating unit configured to adjust an arc length of the at least one electrode in the case of deviation of the actual value of the slag height from a target value.
Dependencies are inferred from the claim text.