Patent application number | Description | Published |
20080198894 | Method For Regulating the Melting Process in an Electric-Arc Furnace - In a method for regulating the melting process in an electric-arc furnace ( | 08-21-2008 |
20080285615 | Method for Determining at Least One State Variable of an Electric Arc Furnace, and Electric Arc Furnace - In a method for determining a state variable of an electric arc furnace, especially for determining the level of the foamed slag ( | 11-20-2008 |
20080307926 | Method for Determining the Properties of the Content of an Arc Furnace - In a method for determining a dividedness and/or position of a batch material ( | 12-18-2008 |
20100071508 | Method of regulating the output of carbon monoxide in a metallurgical melting process - In a method of regulating the output of CO in steel production, oxygen is introduced into a melt to remove carbon present, the actual value of the carbon stream evolved from the melt is determined, the intended value of the evolved carbon stream derived from the amount of oxygen introduced and the carbon content of the melt is calculated, intended and actual values are compared with one another and if the actual value is below the intended value, measures for preventing boiling are undertaken. | 03-25-2010 |
20100106341 | Device for controlling an arc furnace installation - A device for controlling an arc furnace installation has an automatic controller ( | 04-29-2010 |
20100170243 | METHOD AND DEVICE FOR UTILIZING HEAT TRANSPORTED BY A DISCONTINUOUS FLOW OF EXHAUST GASES - In a method and a device for utilizing heat transported by a discontinuous flow of exhaust gases ( | 07-08-2010 |
20100315098 | METHOD FOR DETERMINING AT LEAST ONE STATE VARIABLE OF AN ELECTRIC ARC FURNACE, AND ELECTRIC ARC FURNACE - In a method for determining a state variable of an electric arc furnace, especially for determining the level of the foamed slag ( | 12-16-2010 |
20100327888 | METHOD FOR DETERMINING THE SIZE AND SHAPE MEASURE OF A SOLID MATERIAL IN AN ARC FURNACE, AN ARC FURNACE, A SIGNAL PROCESSING DEVICE AND PROGRAM CODE AND A MEMORY MEDIUM - In a method for determining the size and shape value (M) for a solid material (S), in particular scrap metal, in an arc furnace ( | 12-30-2010 |
20100332160 | METHOD FOR DETERMINING A RADIATION MEASUREMENT FOR THERMAL RADIATION, ARC FURNACE, A SIGNAL PROCESSING DEVICE PROGRAMME CODE AND STORAGE MEDIUM FOR CARRYING OUT SAID METHOD - In a method, a variable characterising an operational state of an electrode of an arc furnace can be determined. An electrode flow guided to the electrode is detected in the method and the structure-borne noise oscillations are detected. From the detected electrode flow, a flow evaluation signal associated with the frequency range of the detected electrode flow is determined. From the detected structure-borne noise oscillations, an oscillation evaluation signal that is associated with a frequency range of the detected structure-borne noise oscillations is detected and a quotient from the oscillation evaluation signal and the flow evaluation signal is formed as a radiation measurement for at least one frequency common to the detected electrode flow and the detected structure-borne noise oscillation. | 12-30-2010 |
20110007773 | METHOD FOR OPERATING AN ARC FURNACE COMPRISING AT LEAST ONE ELECTRODE, REGULATING AND/OR CONTROL DEVICE, MACHINE-READABLE PROGRAM CODE, DATA CARRIER AND ARC FURNACE FOR CARRYING OUT SAID METHOD - In a method for operating an arc furnace ( | 01-13-2011 |
20110167959 | Method and device for introducing dust into a metal melt of a pyrometallurgical installation - A method for introducing dust into a molten bath of a pyrometallurgical installation is described. According to the method, a carrier gas containing dust particles is guided through a heating zone of an electrode less plasma torch, the gas being converted to a plasma by inductive heating prior to being blown into a region of the installation which receives the molten bath. | 07-14-2011 |
20110203412 | Method and furnace for melting steel scrap - A method for smelting steel scrap in a furnace is described, a working gas being blown into the furnace via a flow channel in order to supply melting energy and being guided through at least one electrodeless plasma torch, the plasma being produced by at least one inductive heating coil that coaxially encloses the flow channel and forms a heating zone. Further a melting furnace with at least one heating device that extends through a wall of the furnace is described, for supplying melting energy. The heating device has a tubular body which encloses a flow channel. A longitudinal section of the tubular body is configured as an electrodeless plasma torch, said torch having an inductive heating coil that coaxially encloses the flow channel and forms a heating zone. | 08-25-2011 |
20110291333 | Method and device for introducing dust into a metal melt of a pyrometallurgical installation - A device for introducing dust into a molten bath of a pyrometallurgical installation is provided. An electrodeless plasma torch includes an essentially tubular housing, wherein the housing allows a passage of a carrier gas containing dust particles, and wherein the housing is coaxially surrounded by an inductive load coil which forms a heating zone. | 12-01-2011 |
20110292961 | METHOD AND DEVICE FOR CONTROLLING A CARBON MONOXIDE OUTPUT OF AN ELECTRIC ARC LIGHT OVEN - In a method and a device for controlling a carbon monoxide output of an electric arc oven, comprising an oven container, an arrangement for determining a height of a foamed slag in at least three zones of the oven container on the basis of a solid-borne sound measurement, at least one first device for controlling an oxygen infeed, and at least one second device for controlling a carbon infeed into the oven container, the height of the foamed slag is determined in each of the at least three zones and associated with a carbon monoxide content in the exhaust gas of the electric arc oven, wherein the carbon infeed and/or the oxygen infeed in at least one of the at least three zones is controlled such that the height of the foamed slag is maintained below a maximum value. | 12-01-2011 |
20120055649 | METHOD AND DEVICE FOR RECOVERING ENERGY FROM A HOT STRIP BUNDLE - In a device and a method for recovering energy from at least one metal hot strip bundle (B) which has a temperature of more than 200° C. and is produced in a hot rolling mill (H), the at least one hot strip bundle (B) passes through an energy recovery device ( | 03-08-2012 |
20120140786 | Method and furnace for melting steel scrap - A melting furnace for smelting scrap includes a heating device extending through a wall of the furnace in order to supply melting energy, wherein the heating device including a tubular body, which encloses a flow channel. Further, the furnace includes a heating zone formed by a longitudinal section of the tubular body configured as an electrodeless plasma torch including an inductive heating coil which encloses the flow channel coaxially. An injection pipe is disposed in a central manner in the flow channel extending up or into to the heating zone, wherein the injection pipe is enclosed by a gas guiding pipe coaxially and at a radial distance. An annular channel is arranged between the injection pipe and the wall of the flow channel for supplying a cooling gas. | 06-07-2012 |
20120183010 | METHOD FOR CONTROLLING A MELT PROCESS IN AN ARC FURNACE AND SIGNAL PROCESSING COMPONENT, PROGRAM CODE AND DATA MEDIUM FOR PERFORMING SAID METHOD - A method for controlling a melt process in an arc furnace and signal processing component, program code, and data medium for performing said method are provided. According to the method, sound signals or vibrations from the interior of the furnace container are captured by solid-borne sound sensors, from which characteristic values can be derived for the distribution of melting material, melt, and slag in the furnace fill. A characteristic value SM for thermal radiation impinging on the furnace wall of the container, a characteristic value M for the lumpiness of the melting material in the volume of furnace fill, and a characteristic value MM for the change to the portion of solid melting material contacting the furnace wall are generated in priority sequence. The energy distribution at the electrodes is changed by a control system analyzing the characteristic values in priority sequence, such that thermal load peaks are dampened or even completely prevented. To this end, the strand impedances stored as target values are modified. If the control is not sufficient, the thermal power of the arc is reduced as a subordinate means. A rapidly and reliably effective operating regime for the processes in the arc furnace can thereby be implemented. | 07-19-2012 |
20120320942 | METHOD FOR OPERATING AN ARC FURNACE, CONTROL AND/OR REGULATING DEVICE FOR AN ARC FURNACE, AND ARC FURNACE - An arc furnace, a control and/or regulating device for an arc furnace, and a method for operating an arc furnace are provided, wherein an arc for melting metal is generated by at least one electrode, wherein an arc associated with the electrode(s) has a first radiation power based on preselected operating parameters, wherein the arc furnace is operated according to a predefined operating program based on an expected process sequence, wherein monitoring is performed to detect whether an undesirable deviation exists between the actual process sequence and the expected process sequence. Because a modified second radiation power is specified if a deviation is present, and a modified second set of operating parameters, e.g., impedance value(s), is determined based on the modified second radiation power, a method is provided that permits a minimal melting time while minimizing consumption of operating resources, e.g., with respect to arc furnace cooling. | 12-20-2012 |
20130000445 | METHOD OF SETTING A SLAG CONSISTENCY AND APPARATUS FOR CARRYING OUT THE METHOD - In a method and an apparatus for setting a slag consistency in an electric arc furnace, structure-borne sound measurements are carried out on the electric arc furnace during the melting | 01-03-2013 |
20140013665 | METHOD FOR TREATING CARBON DIOXIDE-CONTAINING WASTE GAS - A hydrocarbon-containing gas is guided to waste gas containing carbon dioxide and the carbon dioxide is at least partially converted into carbon monoxide and hydrogen when reacted with the hydrocarbon. The waste gas is used with the carbon monoxide hydrogen mixture for an additional combustion process. | 01-16-2014 |
20140023577 | METHOD FOR TREATING A CARBON DIOXIDE-CONTAINING WASTE GAS FROM AN ELECTROFUSION PROCESS - A method for treating a carbon dioxide-containing waste gas from an eletrofusion process, in which a hydrocarbon-containing gas is fed to a waste gas and the carbon dioxide in the waste gas is converted at least partially into carbon monoxide and hydrogen in a reaction and the carbon monoxide-hydrogen mixture is stored for an additional combustion process. | 01-23-2014 |
20140112365 | METHOD FOR OPERATING ALTERNATING-CURRENT ELECTRIC ARC FURNACE, DEVICE FOR PERFORMING METHOD, AND ALTERNATING-CURRENT ELECTRIC ARC FURNACE HAVING SUCH DEVICE - 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. | 04-24-2014 |
20140290898 | ROLL CASTING METHOD WITH CRYOGENIC COOLING OF CASTING ROLLS - Molten metal poured into a mold region, delimited by a first casting roll that rotates about a first rotational axis, produces a metal strand upon solidification which is conveyed out of the mold region. A liquid coolant is applied to the surface of the first casting roll by a first cooling device via first coolant lines and first coolant applying devices. The coolant is inert with respect to the molten metal and has a standard boiling point below 20° C., e.g., −20° C., at normal air pressure, and an operating temperature at or below an operating boiling point at an operating pressure at which the coolant is supplied. A control device automatically controls the first cooling device by ascertaining a control state of the first cooling device using a target property for an actual property of the first casting roll or the metal strand detected by at least one sensor. | 10-02-2014 |
20140301423 | METHOD FOR OPERATING ARC FURNACE - A material is melted in an arc furnace by a plasma arc produced by at least one electrode. The plasma arc is regulated by one or more additional substances which influence the plasma composition introduced into the plasma, increasing the efficiency and output of the arc furnace. | 10-09-2014 |