Method for operating an oxygen blowing lance in a metallurgical vessel and measuring system for determining measuring signals used for the same

摘要

The method comprises: continuously detecting and measuring an inlet pressure (P 0 t) and/or an inlet temperature (T 0 t) of gas (8) at a supersonic nozzle, an oscillation amplitude and/or a vibrational frequency of a gas blowing lance (2), an ignition timing in an oxygen-blowing process and/or a local point of ignition in the oxygen-blowing process by detectors or sensors arranged in a region of a lance head (4) during the operation of the lance; and controlling the operation of the lance based on a measurement signal provided to an evaluation and/or process control unit. The method comprises: continuously detecting and measuring an inlet pressure (P 0 t) and/or an inlet temperature (T 0 t) of gas (8) at a supersonic nozzle, an oscillation amplitude and/or a vibrational frequency of a gas blowing lance (2), an ignition timing in an oxygen-blowing process and/or a local point of ignition in the oxygen-blowing process by detectors or sensors arranged in a region of a lance head (4) during the operation of the lance; and controlling the operation of the lance based on a measurement signal provided to an evaluation and/or process control unit. One of the sensors in the region of the lance head: is a pressure sensor that detects and measures the inlet pressure of the gas at the input of the supersonic nozzle; is a temperature sensor that detects and measures the inlet temperature of the gas at the input of the supersonic nozzle; is a vibration sensor that detects and measures the oscillation amplitude and/or the vibrational frequency of the gas blowing lance; and is a light sensor such as charge coupled device or complementary metal oxide sensor that detects and measures the ignition timing in the oxygen-blowing process and/or the local point of ignition in the oxygen-blowing process. A supply pressure of the gas is detected and measured in a gas supply station. The supersonic nozzle has multiples holes each of which is provided with one detector or sensor. The measurement signal from the detectors or sensors are transmitted to the evaluation and/or process control unit through a cable or wirelessly using a radio module arranged in the lance. An electrical energy is provided to the detectors or sensors by an energy harvesting module. An independent claim is included for a system for measuring a measurement signal during operation of a gas blowing lance in a metallurgical vessel.