Method and Device for Controlling Vibrations of a Metallurgical Vessel

A device for controlling vibrations of a metallurgical vessel occurring during the injection of gas into the metallurgical vessel filled with liquid molten metal and provided with a number of individual nozzles for the injection of gas, the individual nozzles being respectively connected to a gas feed line of their own, comprising:

• at least one sensor for measured values correlating with the vibrations of the metallurgical vessel occurring,
• a processing unit for processing the measured values measured by the sensor, and
• in at least two gas feed lines there is at least one device for changing the gas flow through the gas feed line,
• and each device for changing the gas flow is connected to the processing unit.

A system for controlling vibrations of a metallurgical vessel occurring during the injection of gas into the metallurgical vessel filled with liquid molten metal, comprising:

• a metallurgical vessel,
• a plurality of individual nozzles for injecting a certain total amount of gas per unit of time into the liquid molten metal,
• wherein the system is configured to measure values correlating with the vibrations of the metallurgical vessel occurring during the injection, and
• a control unit which, while keeping the total amount of gas injected per unit of time largely constant, is operable to change the amount of gas injected from individual nozzles per unit of time in dependence on the measured values that are measured and correlate with the vibrations of the metallurgical vessel occurring.