| PAUL WURTH S.A. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120111245 | DEVICE FOR REGULATING THE TEMPERATURE OF A GAS IN A HOT GAS MAIN - The present invention proposes a device ( | 05-10-2012 |
| 20120091378 | Sealing valve arrangement for a shaft furnace charging installation - The invention relates to an upper or lower sealing valve arrangement for a shaft furnace charging installation. The arrangement comprises a shutter-actuating device ( | 04-19-2012 |
| 20120070253 | DEVICE FOR DISTRIBUTING CHARGE MATERIAL IN A SHAFT FURNANCE | 03-22-2012 |
| 20120068392 | DEVICE FOR DISTRIBUTING CHARGE MATERIAL INTO A SHAFT FURNACE - A device for distributing charge material into a shaft furnace includes a main housing, a distribution chute, a suspension rotor and an adjustment rotor, which are rotatable about a substantially vertical axis, the chute is suspended to the suspension rotor to rotate therewith for circumferential distribution of charge material and adjustable in orientation through the adjustment rotor for radial distribution of charge material, a differential gear interconnects the suspension rotor and the adjustment rotor and is configured to transmit to the adjustment rotor the same speed of rotation that is imparted to the suspension rotor by a main rotation drive unless an adjustment drive imparts differential rotation to the adjustment rotor, the device further including:
| 03-22-2012 |
| 20120064471 | METHOD FOR OPERATING A REGENERATIVE HEATER - The present invention proposes a method for operating a regenerative heater ( | 03-15-2012 |
| 20120056361 | COOLING PLATE FOR A METALLURGICAL FURNACE - A cooling plate ( | 03-08-2012 |
| 20120055382 | ARRANGEMENT FOR BURNING BLAST FURNACE OFF-GAS FROM A BLEEDER VALVE AND CORRESPONDING BLEEDER VALVE - The invention proposes an arrangement for burning blast furnace off-gas from a bleeder valve. It comprises a bleeder valve ( | 03-08-2012 |
| 20120045298 | SHAFT FURNACE CHARGING INSTALLATION HAVING A DRIVE MECHANISM FOR A DISTRIBUTION CHUTE - The invention concerns a drive mechanism for a distribution chute ( | 02-23-2012 |
| 20120043705 | METHOD FOR FEEDING A BURDEN TO A BLAST FURNACE - The present invention proposes a method for feeding a burden to a blast furnace ( | 02-23-2012 |
| 20120039700 | METHOD FOR FEEDING A BURDEN TO A BLAST FURNACE - The present invention proposes a method for feeding a burden to a blast furnace ( | 02-16-2012 |
| 20120031236 | METHOD AND INSTALLATION FOR PRODUCING DIRECT REDUCED IRON - “A method for producing direct reduced iron in a vertical reactor having an upper reducing zone and a lower cooling zone, the method including:
| 02-09-2012 |
| 20120009534 | METHOD FOR FEEDING HOT GAS TO A SHAFT FURNACE - The present invention proposes a method for feeding hot gas to a shaft furnace ( | 01-12-2012 |
| 20120007291 | TUYERE STOCK ARRANGEMENT FOR A BLAST FURNACE AND METHOD FOR FEEDING HOT BLAST INTO A BLAST FURNACE - Tuyere stock arrangement ( | 01-12-2012 |
| 20110311926 | METHOD AND SYSTEM FOR ADJUSTING THE FLOW RATE OF CHARGE MATERIAL IN A CHARGING PROCESS OF A SHAFT FURNACE - In a charging process of a shaft furnace, in particular of a blast furnace, batches of charge material are typically discharged in cyclical sequence into the furnace from a top hopper using a flow control valve. A method and system is proposed for adjusting the flow rate of charge material in such a process. Pre-determined valve characteristics for certain types of material are provided, each indicating the relation between flow rate and valve setting for one type of material. According to the invention, a specific valve characteristic is stored for each batch of charge material, each specific valve characteristic being bijectively associated to one batch and indicating the relation between flow rate and valve setting of the flow control valve specifically for the associated batch. In relation to discharging a given batch of the sequence the invention proposes: using the stored specific valve characteristic associated to the given batch for determining a requested valve setting corresponding to a flow rate setpoint and using the requested valve setting to operate the flow control valve; determining an actual average flow rate for the discharge of the given batch; correcting the stored specific valve characteristic associated to the given batch in case of a stipulated deviation between the flow rate setpoint and the actual average flow rate. | 12-22-2011 |
| 20110311346 | METHOD AND SYSTEM FOR ADJUSTING THE FLOW RATE OF CHARGE MATERIAL IN A CHARGING PROCESS OF A SHAFT FURNACE - In a charging process of a shaft furnace, in particular of a blast furnace, batches of charge material are typically discharged in cyclical sequence into the furnace from a top hopper using a flow control valve. A method and system is proposed for adjusting the flow rate of charge material in such a process. According to the invention, a respective set of plural valve settings is stored for each batch, each valve setting of a set being associated to a different stage in the discharge of the batch. The method and system are configured to discharge a given batch so that, at each stage in the discharge of the given batch, the flow control valve operates at a constant valve opening according to the valve setting associated to that stage and so that an actual average flow rate at which charge material is discharged is determined for that stage. Further according to the invention, the method and system are configured to correct the plural valve settings offline and in function of the actual average flow rate determined for the associated stage. | 12-22-2011 |
| 20110282494 | COMPUTER SYSTEM AND METHOD FOR CONTROLLING CHARGING OF A BLAST FURNACE BY MEANS OF A USER INTERFACE - The invention relates to computer-implemented charging of a blast furnace equipped with an automated to charging installation and stockhouse for batchwise charging. It proposes: obtaining a nominal charge dataset reflecting a nominal blast furnace charge and comprising plural charge material records, each charge material record comprising a material type and an associated nominal charge quantity; generating a graphical user interface comprising batch data fields for entering and displaying plural batch datasets for pre-configuring batches, each batch dataset comprising at least one batching record, each batching record comprising a material type and an associated batching proportion. According to the invention, the batching proportion associated to a material type in a batching record is used for predefining a ratio between the material quantity that is to be contained in a batch and the nominal charge quantity. Further according to the invention, the method comprises computing, for the respective material type of each batching record, based on the batching proportion and the nominal charge quantity associated to the respective material type, an associated batching quantity which the stockhouse is to provide in a batch as pre-configured by the batch dataset. | 11-17-2011 |
| 20110274519 | LOWER SEALING VALVE UNIT FOR A BLAST FURNACE TOP CHARGING SYSTEM - A lower sealing valve unit for a charging system of a shaft furnace includes a housing having a pair of inlets and at least one outlet; a valve seat associated with each inlet; and a flap associated with each valve seat and adapted for, in a closed position, engaging the valve seat to sealingly close the inlet, each flap being supported by a pivotable shaft allowing displacement between the closed position and an open position off the associated valve seat, where a common structure, mounted to one side of the housing, includes a pair of drive mechanisms, each connected to one of the pivotable shafts for independent actuation thereof, the shafts passing coaxially though the housing side and being supported by the common structure. | 11-10-2011 |
| 20110272868 | BUSTLE PIPE ARRANGEMENT - The present invention proposes a bustle pipe arrangement ( | 11-10-2011 |
| 20110271884 | SHAFT FURNACE CHARGING INSTALLATION - A blast furnace charging system for feeding charge material into the hearth of a blast furnace includes at least two hoppers for temporarily storing charge material, each hopper having a discharge assembly for feeding the charge material from the respective hopper into the hearth of a blast furnace, the discharge assembly including an inclined discharge channel having, at its lower end, a material gate providing charge material flow control at the lower end of the discharge channel; and a protection ring arranged in the vicinity of the material gate for leading charge material from the discharge channel to a seal seat of the discharge assembly, where the discharge assembly further includes a heated panel arranged on the protection ring, the heated panel being formed by a panel-like copper body having fluid channels arranged therein so as to form a channel leading from a fluid inlet to a fluid outlet. | 11-10-2011 |
| 20110271587 | METHOD OF PRODUCING PULVERIZED COAL - A method for producing pulverized coal including the steps of providing a drying gas heated to a predefined temperature in a hot gas generator; feeding the heated drying gas into a pulverizer; introducing raw coal into the pulverizer, the pulverizer grinding the raw coal into pulverized coal; collecting a mixture of drying gas and pulverized coal from the pulverizer and feeding the mixture to a filter, the filter separating the dried pulverized coal from the drying gas; collecting the dried pulverized coal for further use and feeding the drying gas from the filter to an exhaust line; and collecting the drying gas exiting the filter and feeding part of the collected drying gas to a recirculation line for feeding recirculation drying gas to the hot gas generator. According to an important aspect of the present invention, the step of providing the drying gas includes feeding a variable flow rate of hot stove waste gas to the hot gas generator through a hot stove waste gas line so as to maximize the amount of hot stove waste gas used as drying gas. A pressure of the drying gas at a pulverizer gas inlet is controlled by regulating a flow rate of the hot stove waste gas through the hot stove waste gas line. | 11-10-2011 |
| 20110268632 | HYDROMETALLURGICAL METHOD FOR THE REUSE OF SECONDARY ZINC OXIDES RICH IN FLUORIDE AND CHLORIDE - The present invention relates to a method for removing halides, in particular chlorides and fluorides, from starting secondary zinc oxides, for example Waelz or Primus oxides, comprising the steps (1) for washing the secondary zinc oxides with sodium carbonate and separating the solid residue from the basic liquid, (2) leaching at least one portion of the solid residue of step 1 by means of H | 11-03-2011 |
| 20110253017 | BUSTLE PIPE ARRANGEMENT - The present invention proposes a bustle pipe arrangement ( | 10-20-2011 |
| 20110232547 | INJECTION SYSTEM FOR SOLID PARTICLES - An injection system for solid particles comprises a conveying hopper ( | 09-29-2011 |
| 20110210484 | COOLING PLATE FOR A METALLURGICAL FURNACE AND ITS METHOD OF MANUFACTURING - A cooling plate for a metallurgical furnace includes a body with a front face, an opposite rear face ( | 09-01-2011 |
| 20110209576 | METHOD FOR OPERATING A BLAST FURNACE AND BLAST FURNACE INSTALLATION - A method for operating a blast furnace and a corresponding blast furnace, the method including recovering top gas from the blast furnace, submitting at least a portion of the top gas to a recycling process, and feeding the recycled top gas back into the blast furnace, where the recycling process includes feeding the recovered top gas to a reformer unit, feeding volatile carbon containing material to the reformer unit, proceeding to flash gasification of the volatile carbon containing material in the reformer unit, at a temperature between 1100 and 1300° C., and thereby producing devolatised carbonaceous material and synthesis, and allowing the devolatised carbonaceous material and synthesis gas to react with the recovered top gas. | 09-01-2011 |
| 20110203234 | DUST-CATCHER FOR BLAST FURNACE GAS - A conventional dust-catcher for blast furnace gas comprises a pressure vessel, with a gas inlet and outlet dome ( | 08-25-2011 |
| 20110192080 | METHOD FOR PRODUCING PULVERIZED COAL - Method for producing pulverized coal, the method comprising the steps of heating a drying gas, preferably an inert gas, in a hot gas generator ( | 08-11-2011 |
| 20110192079 | METHOD FOR PRODUCING PULVERIZED COAL - Method for producing pulverized coal, the method comprising the steps of heating a drying gas, preferably an inert gas, in a hot gas generator ( | 08-11-2011 |
| 20110182700 | LOWER SEALING VALVE ASSEMBLY FOR A SHAFT FURNACE CHARGING INSTALLATION AND VALVE ACTUATION MECHANISM THEREFORE - A lower sealing valve assembly for a shaft furnace charging installation including a lower sealing valve housing with a lower outlet through which charge material can freely drop onto a distribution device, the housing has at least one upper inlet for communicating with an outlet of a hopper arranged above the housing, where each inlet has an associated valve seat that is arranged inside the lower sealing valve housing and turned towards the interior of the housing, a shutter is further operatively connected to an actuation mechanism for moving the shutter into and out of sealing contact with the valve seat, the valve actuation mechanism includes a turn-slide cylindric joint having a typically vertical joint axis for swiveling the shutter in a plane perpendicular to the joint axis inside the lower sealing valve housing and for translating the shutter up and down along the joint axis such that the cylindric joint includes a shaft that is axially fixed and rotatably in a hollow sleeve, which in turn is axially slideable in an outer shell that is fixed to the housing and, further according to the invention, the mechanism includes a first hydraulic cylinder, which is connected on one side to the shell and on the other side to the hollow sleeve to impart axial translation to the sleeve and therewith to the shaft along the joint axis; and: a second hydraulic cylinder, which is hinged on one side to the sleeve and on the other side to the shaft, to impart rotation to the shaft and about the joint axis. | 07-28-2011 |
| 20110180978 | METHOD FOR FEEDING PULVERISED COAL INTO A BLAST FURNACE - The present invention proposes a method for feeding pulverised coal into a blast furnace, wherein the method comprises the following steps: providing a tuyere stock ( | 07-28-2011 |
| 20110164950 | SHAFT FURNACE CHARGING DEVICE AND CORRESPONDING DISTRIBUTION CHUTE - A charging device for a shaft furnace, in particular for a blast furnace and a cooperating distribution chute are proposed, where the distribution chute has an elongated chute body providing a sliding channel for bulk material and two chute-mounting members attached laterally to either side of the chute body for mounting the distribution chute to the charging device, the charging device including a mechanism for rotating the distribution chute, the mechanism having a rotatable support rotor with two suspension flanges cooperating with the chute-mounting members of the distribution chute for mounting the distribution chute, where each chute-mounting member of the chute includes a hook-shaped portion that forms a suspension hook for mounting the distribution chute to the suspension flanges, each suspension flange in turn has a support configured for engagement with the hook-shaped portion of the chute along a hook engagement direction, and furthermore, each chute-mounting member includes an abutment portion that cooperates with a counter-abutment on the corresponding suspension flange to provide abutment in a direction transversal to the hook engagement direction (C) so as to preclude pivoting of the chute about the supports of the suspension flanges. | 07-07-2011 |
| 20110135425 | CHARGING INSTALLATION FOR A SHAFT FURNACE AND LOWER SEALING VALVE ASSEMBLY THEREFORE - The invention concerns a charging installation for a shaft furnace, in particular for a blast furnace, and especially the lower sealing valve assembly thereof, the installation including at least two hoppers acting as lock hoppers for intermediate storage of charge material to be charged into the furnace, the lower sealing valve includes a lower sealing valve housing arranged below the hoppers, the lower sealing valve housing has at least two inlets respectively communicating with one of the hoppers and an outlet for passing charge material into the furnace, each inlet has a respective associated valve seat providing gas-tight sealing of the hoppers downstream, the lower sealing valve assembly further includes a sealing valve mechanism for sealing the inlets, more specifically for closing the seats in technically gas-tight manner, where the sealing valve mechanism includes a one-sided shutter having a single sealing face that cooperates with both of the at least two valve seats, by virtue of the sealing valve mechanism being configured to bring the sealing face of the one-sided shutter into sealing contact in turn with each of the at least two valve seats for sealing the associated inlet. | 06-09-2011 |
| 20110109024 | APPARATUS FOR INSERTION AND EXTRACTION OF FUEL INJECTION LANCES INTO AND OUT OF THE TUYERE STOCK OF A FURNACE BLAST - An apparatus for insertion and extraction of a fuel injection lance into and out of a tuyere stock ( | 05-12-2011 |
| 20110104513 | COOLING PLATE FOR A METALLURGICAL FURNACE - A cooling plate ( | 05-05-2011 |
| 20110079068 | METHOD FOR MANUFACTURING A COOLING PLATE FOR A METALLURGICAL FURNACE - A method for manufacturing a cooling plate ( | 04-07-2011 |
| 20110074071 | COOLING PLATE ARRANGEMENT AND METHOD FOR INSTALLING COOLING PLATES IN A METALLURGICAL FURNANCE - The present invention proposes a gap-filler insert ( | 03-31-2011 |
| 20110002758 | CHARGING DEVICE FOR A SHAFT FURNACE - A charging device for a shaft furnace, which includes at least one charging hopper having a discharge orifice arranged in a position off-centre with respect to the central axis of the shaft furnace, and a material distribution device arranged below this hopper. The material distribution device includes a feed channel coaxial with the central axis of the furnace and a rotatable, pivotable chute, which is arranged below the feed channel for distributing a charge in the shaft furnace. The charging device also includes a connecting box in the shape of a funnel, arranged between the material distribution device and the charging hopper. The connecting box possesses a lower central outlet communicating with the charging hopper and at least one upper inlet which is arranged off-centre with respect to the central axis of the furnace and communicates with the discharge orifice of the hopper. According to the invention, the charging device includes at least one spreader situated upstream of the distribution device, on the trajectory of the material discharged from the discharge orifice. The spreader enables a flow of material to be dispersed to both sides of the feed channel. | 01-06-2011 |
| 20100329826 | CHARGING DEVICE FOR DISTRIBUTING BULK MATERIAL - A charging device ( | 12-30-2010 |
| 20100322744 | CHARGE DISTRIBUTION APPARATUS - The present invention proposes a charge distribution apparatus for a furnace comprising a charge distribution chute and a drive mechanism ( | 12-23-2010 |
| 20100242676 | RECOVERY OF RESIDUES CONTAINING COPPER AND OTHER VALUABLE METALS - A process for recovering non-ferrous metals, in particular copper, nickel and cobalt, from metallurgical residues containing these non-ferrous metals at an oxidation state of greater than or equal to zero, in an alternating current type plasma arc electric furnace comprising a plurality of electrodes, containing a liquid copper heel covered by a fluid slag comprising at least one fusion-reduction phase, comprising charging of metallurgical residues comprising the non-ferrous metals onto the heel contained in the plasma arc electric furnace, fusion of the metallurgical residues in the fluid slag or at the slag-metal bath interface, reduction of at least the non-ferrous metals to oxidation state zero, and intense stirring of the copper heel by injection of inert gas, preferably nitrogen and/or argon, so as to avoid crust formation and to accelerate the reduction reaction and to cause the copper-miscible non-ferrous metals to pass into the copper heel. | 09-30-2010 |
| 20100201051 | BLEEDER VALVE FOR PRESSURIZED FURNACE - A shaft furnace bleeder valve for controlling a gas outflow from the interior of a pressurized furnace to the ambient atmosphere through an exhaust conduit is proposed. The bleeder valve comprises a valve seat associated with the exhaust conduit, a movable closure member having a central closure surface and a peripheral sealing surface cooperating with the valve seat, the closure surface comprising a convex surface at least in proximity to the sealing surface. The valve further has an actuating mechanism, which is connected to the closure member for moving the closure member between a closed position on the valve seat and an open position distant from the valve seat. According to the invention, the closure member comprises a recurved deflection portion at the periphery of the peripheral sealing surface, the recurved deflection portion comprising a deflection surface inclined against the convex surface by an angle in the range of 30° to 70° for imparting to a gas outflow passing between the valve seat and the closure member a velocity component which is opposite to the initial opening movement of the closure member. | 08-12-2010 |
| 20100200070 | COKE OVEN OFFTAKE PIPING SYSTEM - A coke oven piping system ( | 08-12-2010 |
| 20100189637 | METHOD FOR THE VALORISATION OF ZINC-AND SULPHATE-RICH RESIDUE - The present invention describes a method for treating residues comprising zinc ferrites and non-ferrous metals selected from among the group made up of lead (Pb), silver (Ag), indium (In), germanium (Ge) and gallium (Ga) or mixtures thereof in the form of oxides and sulfates, comprising the following steps:
| 07-29-2010 |
| 20100187087 | COKE OVEN OFFTAKE PIPING SYSTEM - A coke oven offtake piping system including a pipe assembly for conveying coke oven gases from a coke oven to a collecting main, at least one spraying nozzle in pipe assembly, and a discharge section with a discharge pipe having a discharge orifice, where a gate member cooperates with the discharge orifice and is movable along the discharge orifice in order to present a closing surface to the extremity thereof, whereby the opening area of said discharge orifice can be varied for controlling the flow rate to the collecting main. | 07-29-2010 |
| 20100163769 | FLOW CONTROL VALVE FOR FLUIDIZED MATERIAL - “A flow control valve for fluidized material comprises a valve housing having a valve chamber with a valve seat and a valve plug having a flow passage, the valve plug being arranged inside the valve chamber in front of the valve seat ( | 07-01-2010 |
| 20100129759 | MULTIPLE HEARTH FURNACE - A multiple hearth furnace including a rabble arm with a tubular structure and a solid plug body. The latter is received in a socket arranged in an arm fixing node. It has an axial through boring and cooling fluid supply and return channels arranged around this through boring. A clamping bolt is rotatably fitted in the through boring. It has a bolt head, which can be brought by rotation into and out of hooking engagement with an abutment surface on the arm fixing node. A threaded end of the clamping bolt sticks out of the through boring at the rear end of the plug body. A threaded sleeve, which is screwed onto this threaded end, bears on an abutment surface at the rear end of the plug body for exerting a clamping force onto the clamping bolt. | 05-27-2010 |
| 20100126309 | METHOD FOR RECOVERING MOLYBDENIUM, NICKEL, COBALT OR THEIR MIXTURES FROM USED OR REGENERATED CATALYSTS - The invention describes a method for recovering molybdenum, nickel, cobalt or their mixtures from used or regenerated catalysts in an electric arc furnace containing a heel of liquid cast iron, surmounted with a fluid slag, comprising the following steps: a) adding used or regenerated catalysts into the heel contained in the electric arc furnace, b) adding dosed lime in order to obtain a slag with a CaO to Al | 05-27-2010 |
| 20100119986 | MULTIPLE HEARTH FURNACE - A multiple hearth furnace includes a gas cooling system for its central shaft and its rabble arms. This gas cooling system includes within the shaft an annular main distribution channel for supplying a cooling gas to the rabble arms and a central exhaust channel for evacuating the cooling gas leaving the rabble arms. The gas cooling system further includes an annular main supply channel surrounding the annular main distribution channel and being outwardly delimited by an outer shell of the shaft. A cooling gas inlet is connected to the annular main supply channel. A cooling gas passage between the annular main supply channel and the annular main distribution channel is spaced from the cooling gas inlet, so that cooling gas supplied to the cooling gas inlet has to flow through the annular main supply channel through several hearth chambers before it flows through the cooling gas passage into the annular main distribution channel. | 05-13-2010 |
| 20100028106 | ROTARY CHARGING DEVICE FOR A SHAFT FURNACE - A rotary charging device ( | 02-04-2010 |
| 20100024598 | PROCESS FOR THE TREATMENT OF CONTAMINATED METAL RESIDUES AND APPARATUS FOR IMPLEMENTING IT - Process and apparatus for the treatment of divided metal residues contaminated by one or more organic compounds, comprising: mixing, inside a chamber, of said metal residues with at least one calcium/magnesium compound capable of reacting exothermically with water; exothermic reaction of said at least one calcium/magnesium compound with the water that the metal residues contain; rise in temperature of the metal residues subject to an exothermic reaction; dehydration of said metal residues during this exothermic reaction; oxidation of the organic compounds during said mixing, by bringing the metal residues contaminated by one or more organic compounds mixed with said at least one calcium/magnesium compound into contact with a gas stream containing at least partly oxygen; and removal from the chamber of a handleable dehydrated treated product having a residual content of organic compounds of less than 1% by weight of said treated product. | 02-04-2010 |
| 20100001443 | PULVERIZED COAL INJECTION LANCE - The present invention proposes a pulverized coal injection lance ( | 01-07-2010 |
| 20090205543 | COOLING PLATE FOR AN IRON- OR STEELMAKING FURNACE - A cooling plate for an iron and steelmaking furnace includes a copper cooling plate body having at least one cooling duct for a cooling medium extending essentially parallel with the back of the cooling plate body. The cooling plate body further includes a preformed, externally accessible recess into which the cooling duct opens. A connection piece is utilized as a cooling medium connection on the back of the cooling plate body, while a formed piece fitted within the externally accessible recess forms a deflection surface for the cooling medium flowing from the connection piece into the cooling duct, or from the cooling duct into the connection piece. | 08-20-2009 |
| 20090200715 | METHOD OF MANUFACTURING A STAVE COOLER FOR A METALLURGICAL FURNACE AND A RESULTING STAVE COOLER - A method of manufacturing a stave cooler for a metallurgical furnace including supplying a metal plate having an inward side for facing the inside of the furnace and an opposite outward side; supplying at least one coolant pipe; establishing a thermo-conductive contact between the coolant pipe and the metal plate; providing the coolant pipe with a flattened face and externally fixing the flattened face to the metal plate on the outward side for establishing the thermo-conductive contact. | 08-13-2009 |
| 20090129896 | Charging Device and Distribution Chute for a Shaft Furnace - A charging device for a shaft furnace comprises a distribution chute for bulk material and a drive mechanism for the distribution chute. The distribution chute has a trough-shaped main part with an open impact section and an outlet section. The main part provides a sliding channel between the impact section and the outlet section. The drive mechanism for the distribution chute is capable of rotating the distribution chute about an essentially vertical axis and pivoting the distribution chute about an essentially horizontal axis so as to allow distribution of bulk material on a charging surface of the shaft furnace. According to the present invention, the distribution chute comprises a circumferentially closed funnel portion which tapers in the direction of flow and is arranged downstream of the impact section and with its outlet at the downstream end of said trough-shaped main part. | 05-21-2009 |
| 20090092465 | MULTIPLE HOPPER CHARGING INSTALLATION FOR A SHAFT FURNACE - A multiple hopper charging installation for a shaft furnace includes a rotary distribution device for distributing bulk material in the shaft furnace by rotating a distribution member about a central axis of the shaft furnace and at least two hoppers arranged in parallel and offset from the central axis above the rotary distribution device. Each hopper has a lower funnel part ending in an outlet portion and each hopper has a material gate valve with a shutter member associated to its outlet portion. According to the invention, each funnel part is configured asymmetrically with its outlet portion being eccentric and arranged proximate to the central axis, each outlet portion is oriented vertically so as to produce a substantially vertical outflow of bulk material and each material gate valve has a one-piece shutter member and is configured with its respective shutter member opening in a direction pointing away from the central axis such that any partial valve opening area is located on the side of the associated outlet portion proximate to the central axis. | 04-09-2009 |
| 20090087284 | THREE HOPPER CHARGING INSTALLATION FOR A SHAFT FURNACE - A three hopper charging installation for a shaft furnace includes a rotary distribution device for distributing bulk material in the furnace by rotating a distribution member about the furnace central axis and a first, a second and a third hopper arranged in parallel above the rotary distribution device and offset from the central axis. A sealing valve housing is arranged between the hoppers and the distribution device. It has a top part with a first, a second and a third inlet respectively communicating with the first, the second and the third hopper. A first, a second and a third sealing valve are provided in the top part. Each sealing valve includes a flap which is pivotable between a closed sealing position and an open parking position. The sealing valve housing also has a funnel shaped bottom part with an outlet communicating with the distribution device. According to the invention, the top part of the sealing valve housing has a tripartite stellate configuration in horizontal section with a central portion, in which the inlets are arranged adjacently in triangular relationship about the central axis, and with a first, a second and a third extension portion, each sealing valve being adapted such that its flap opens outwardly with respect to the central axis by pivoting into a parking position located in the first, second or third extension portion respectively. | 04-02-2009 |
| 20090044594 | Method and Device for Calibrating a Weighing System of a Blast Furnace Top Hopper - A method for calibrating a weighing system of a blast furnace top hopper and a corresponding weighing system are disclosed. The method comprises the step of using at least one actuator for exerting a vertical net force with a certain magnitude onto the hopper, so as to simulate a certain weight of charge material in the hopper; and the step of determining the magnitude of the vertical net force. According to the invention, the method further comprises the step of determining the magnitude of a pressure exerting a lifting force onto said hopper and the step of using the determined magnitude of the vertical net force and the determined magnitude of the pressure to establish calibration data for the weighing system. | 02-19-2009 |
| 20080290567 | Rotary Charging Device for a Shaft Furnace Equipped with a Cooling System - A rotary charging device for a shaft furnace, in particular a blast furnace, is disclosed. The charging device is equipped with a cooling system. The rotary charging device includes a rotatable support for rotary distribution means as well as a stationary housing for the rotatable support. The cooling system includes a rotary cooling circuit fixed in rotation with the rotatable support as well as a stationary cooling circuit on the stationary housing. A heat transfer device is provided which includes a stationary heat transfer element configured to be cooled by a cooling fluid flowing through the stationary cooling circuit and which includes a rotary heat transfer element configured to be heated by a separate cooling fluid circulated in the rotary cooling circuit. These heat transfer elements are arranged in facing relationship and have there between a heat transfer region for achieving heat transfer by convection and/or radiation through the heat transfer region without mixing of the separate cooling fluids of the rotary and stationary cooling circuits. | 11-27-2008 |
| 20080264694 | Drill Rod - According to the present invention, a drill rod ( | 10-30-2008 |
| 20080232940 | Charging Device for a Shaft Furnace - A charging device for charging a shaft furnace, including a rotary distributor and a variable drive for rotating the rotary distributor about an essentially vertical axis of rotation, where the rotary distributor includes a plurality of guiding members which form sliding channels for charge material, and where the rotary distributor comprises a junction slide from which each guiding member issues and which is arranged such that a flow of charge material slides via one specific guiding member in function of the velocity and/or the sense of rotation of the rotary distributor. | 09-25-2008 |
