Abstract: A device for determining the topography of the burden surface in a shaft furnace (10), the device comprising a radar device (20) that scans the burden surface (18) and has an antenna device (22) arranged in the area of a furnace cover (13), the antenna device being arranged on an axis of rotation (24) that is inclined in relation to a vertical axis (15) of the shaft furnace at an angle of inclination ? and being rotatable about the axis of rotation by means of a drive device in such a manner that a radar fan beam (28) formed by the emitted radar radiation of the antenna device is incident upon the burden surface along a profile line p and sweeps across the burden surface as the antenna device rotates.

Abstract: The invention relates to a device for determining the topography of the burden surface in a shaft furnace (10), the device comprising a radar device (20) that scans the burden surface (18) and has an antenna device (22) arranged in the area of a furnace cover (13), the antenna device being arranged on an axis of rotation (24) that is inclined in relation to a vertical axis (15) of the shaft furnace at an angle of inclination a and being rotatable about the axis of rotation by means of a drive device in such a manner that a radar fan beam (28) formed by the emitted radar radiation of the antenna device is incident upon the burden surface along a profile line p and sweeps across the burden surface as the antenna device rotates.

Abstract: The invention relates to a method for regulating the flow rate and for slowing down non-ferromagnetic, electrically conducting liquids and melt streams through magnetic fields, in particular in the tapping of metallurgical containers such as blast furnaces and melt furnaces.

Abstract: The invention relates to a method for regulating the flow rate and for slowing down melt streams through magnetic fields in the tapping of metallurgical containers such as blast furnaces and melt furnaces. The method is characterized in that the melt stream is routed in a closed routing element using at least two magnetic fields disposed in series one after the other in the flow direction of the melt, said magnetic fields having a constant polarity opposite to one another, in such a way that the magnetic field lines transversally penetrate the melt flow across the entire cross section thereof and such that opposite voltages are induced in the melt stream by the magnetic fields, there being at least three eddy current fields produced thereby in the melt stream that are disposed axially one after the other, and that due to the interactions between the magnetic fields and the eddy currents forces are generated that can be used to reduce the flow rate of the melt stream.

Abstract: The invention relates to a diaphragm device (38) and to a method for protecting an optical observation opening (39), in particular for protecting the observation opening against contaminants from a dirty atmosphere (35) in a blast furnace or the like, having a nozzle unit and a purging gas chamber (43), wherein the nozzle unit forms a diaphragm aperture (26) for the observation opening and is used to form a purging gas flow, wherein the purging gas chamber is formed between an optical surface (41) of the observation opening and the diaphragm aperture. A purging gas is applied to the purging gas chamber and purging gas can be led through the diaphragm aperture into the dirty atmosphere, wherein the nozzle unit has a flow guiding device (31, 49) which effects guidance of the flow of purging gas escaping into the dirty atmosphere.

Abstract: A device and an apparatus for measuring the length of an electrode (14) or determining the position of a consumable cross-section (17) of the electrode (14) in an electric furnace (10), in which the measuring is performed by radar in such a manner that a radar transmitter/receiver device (22) is connected by a waveguide connection device (21) to a waveguide (20), which is arranged on the electrode (14) and extends in the consumption direction (19) of the electrode (14) from an end cross-section (18) of the electrode (14) to a consumable cross-section (17) of the electrode (14), and the time difference is measured between the emission of the radar signal an the reception of an echo generated by reflection from a discontinuity point of the waveguide in the consumable cross-section (17) of the electrode (14).

Abstract: A regulating device regulates the flow rate of non-ferromagnetic, electrically conducting liquids and melt streams through magnetic fields inducing eddy currents in the melt stream. In a preferred embodiment, the regulating device controls the melt stream using at least one stationary magnetic field with a constant polarity, at least one stationary magnetic alternating field or using a multi-poled magnetic travelling field, in such a way that the magnetic field lines transversally penetrate the melt flow across the entire cross section thereof and such that a voltage is induced in the melt stream by the magnetic fields.

Abstract: The invention relates to a method and device for regulating the flow rate and for slowing down non-ferromagnetic, electrically conducting liquids and melt streams through magnetic fields, in particular in the tapping of metallurgical containers such as blast furnaces and melt furnaces.

Abstract: The invention relates to a method for regulating the flow rate and for slowing down melt streams through magnetic fields in the tapping of metallurgical containers such as blast furnaces and melt furnaces. The method is characterized in that the melt stream is routed in a closed routing element using at least two magnetic fields disposed in series one after the other in the flow direction of the melt, said magnetic fields having a constant polarity opposite to one another, in such a way that the magnetic field lines transversally penetrate the melt flow across the entire cross section thereof and such that opposite voltages are induced in the melt stream by the magnetic fields, there being at least three eddy current fields produced thereby in the melt stream that are disposed axially one after the other, and that due to the interactions between the magnetic fields and the eddy currents forces are generated that can be used to reduce the flow rate of the melt stream.

Abstract: The invention relates to a method for regulating the flow rate and for slowing down non-ferromagnetic, electrically conducting liquids and melt streams through magnetic fields, in particular in the tapping of metallurgical containers such as blast furnaces and melt furnaces.