| Patent application number | Description | Published |
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| 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 |
| 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 |
| 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 |
| 20100028106 | ROTARY CHARGING DEVICE FOR A SHAFT FURNACE - A rotary charging device ( | 02-04-2010 |
| 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 |
| 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 |
| 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 |
| 20100200070 | COKE OVEN OFFTAKE PIPING SYSTEM - A coke oven piping system ( | 08-12-2010 |
| 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 |
| 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 |
| 20100329826 | CHARGING DEVICE FOR DISTRIBUTING BULK MATERIAL - A charging device ( | 12-30-2010 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 20120070253 | DEVICE FOR DISTRIBUTING CHARGE MATERIAL IN A SHAFT FURNANCE | 03-22-2012 |
| 20130039723 | DEVICE FOR DISTRIBUTING BULK MATERIAL WITH A DISTRIBUTION SPOUT SUPPORTED BY A CARDAN SUSPENSION - A distribution device for distributing bulk material with a distribution spout on a cardan suspension that has a first and a second gimbal member pivotable about two perpendicular suspension axes where a drive arrangement has a first and a second transmission mechanism for controlling pivotal motion of the distribution spout about the suspension axes and the drive arrangement has a further cardan joint, with a first part pivotable about a third axis and a second part pivotable about a fourth axis, and a rotary motor for driving a rotary drive shaft that is connected to the cardan joint by means of an articulated connecting arm such that the rotational position and the axial position of the drive shaft determine the pivotal position of the second part about the third and fourth axes respectively, where the transmission mechanisms transmit torque about the third and fourth axes from the cardan joint to the cardan suspension for pivoting the distribution spout about the first and second axes respectively. | 02-14-2013 |
| 20140131162 | DISTRIBUTION CHUTE FOR A CHARGING DEVICE - The invention relates to a distribution chute ( | 05-15-2014 |
| 20140166116 | CHARGING DEVICE FOR SHAFT FURNACE WITH CONTROLLER FOR CLEAN GAS FED TO ITS MAIN CASING - A charging device for a shaft furnace comprises a main casing and at least one nozzle for introducing a clean gas into the casing. According to an important aspect of the invention, a controller is configured to adapt the supply (the flow rate) or pressure of clean gas in the main casing based on charging status information. | 06-19-2014 |
| 20140246815 | BLAST FURNACE INSTALLATION - A blast furnace installation includes a blast furnace and a chute transmission gearbox; the blast furnace having a top cone with a top cone ring arranged thereon for receiving a connection flange of the chute transmission gearbox. The connection flange is directly fixed onto the top cone ring by fixing means for establishing a firm connection between the top cone ring and the connection flange. According to an aspect of the present invention, the connection flange is fixed to the top cone ring in three separated fixation regions ( | 09-04-2014 |
| 20150021837 | SYSTEM OF LEAKTIGHT CONNECTION BETWEEN A TUYERE AND A HOT BLAST INLET NOZZLE FOR A SHAFT FURNACE, AND STEEL-MAKING BLAST FURNACE COMPRISING SUCH A SYSTEM - The sealed connection system between a tuyere of a shaft furnace, such as a steelmaking blast furnace, and an air blast pipe, in which a tip of the blast pipe is pressed towards a rear end of the tuyere, being centred thereon while still retaining freedom of pivoting movement relative thereto, including an added annular blast pipe seat, placed between the tip of the blast pipe and tuyere and immobile relative to the tuyere, the blast pipe tip resting against a rear face of the seat and an immobile gasket being placed between the seat and the tuyere such that the seat rests in sealed manner against a rear face of the tuyere, and a sleeve arranged around the contact zone between the blast pipe tip and the seat, is connected in sealed manner to the seat and to the blast pipe. | 01-22-2015 |
