EP1728572B1 - Ladle plugging method and applicator device - Google Patents
Ladle plugging method and applicator device Download PDFInfo
- Publication number
- EP1728572B1 EP1728572B1 EP06010944A EP06010944A EP1728572B1 EP 1728572 B1 EP1728572 B1 EP 1728572B1 EP 06010944 A EP06010944 A EP 06010944A EP 06010944 A EP06010944 A EP 06010944A EP 1728572 B1 EP1728572 B1 EP 1728572B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- shell
- ladle
- valve
- casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
- F27D3/1509—Tapping equipment
- F27D3/1536—Devices for plugging tap holes, e.g. plugs stoppers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/44—Consumable closure means, i.e. closure means being used only once
- B22D41/46—Refractory plugging masses
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/12—Opening or sealing the tap holes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4653—Tapholes; Opening or plugging thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
Definitions
- This invention relates to a method for preparing a ladle for a cycle of filling and casting of molten metal and in particular steel and allowing avoiding obstruction of the casting channel of the ladle during the process.
- This invention also relates to a device for implementing said method.
- the mixture is poured by the worker into the casting channel on the bottom of the ladle from the upper inlet opening of the molten steel and does not always go to appropriately occupy the channel so that the obstruction phenomenon is not always opposed in a satisfactory manner and with a certain frequency the solid plug preventing flow of the molten steel can still form.
- the operation is also long and awkward and calls for intervention of specialized workers.
- the general purpose of this invention is to remedy the above-mentioned shortcomings by making available a method for preparing a ladle for a filling and casting cycle allowing limiting to a minimum the possibility of obstruction of the casting channel of the ladle during processing and avoiding creation of situations dangerous for the workers of the mill.
- Another purpose is to make available a simple and economical device for implementation of said method.
- a device for application of a refractory substance with fluid behavior in the casting channel of a ladle closed by a plugging valve comprising means of feeding the substance to a pistol provided with a distributor designed to be inserted into the passage of the valve to reach with its injection end the outlet of the channel with there being provided at said injection end means of connection for engagement with an inlet opening of a starting cartridge comprising a flexible shell designed to receive the substance coming from the distributor inside the channel.
- a cartridge designed to be inserted in the casting channel of a ladle through the plugging valve of the channel before filling of the ladle with molten metal and comprising a deformable shell having maximum volume nearly equal to or greater than the volume of the channel with the shell being provided with an opening through which once inserted in the channel it is designed to be filled with a refractory substance with fluid behavior until its walls do not adhere to the channel wall.
- FIG 1 shows a ladle 11 provided with side walls 12a and 12b, an upper opening 62 for receiving the molten steel from the furnace (not shown) and a bottom wall 61.
- the ladle 11, shown empty before the casting cycle, is supported with the side wall 12a on a support 60 so that the bottom wall 61 is vertical.
- the casting channel 27 is made opposite a wall part denominated 'seat-holding block'.
- a plugging (or casting) valve 14 made like a valve in accordance with techniques known in the steel-mill field.
- the ladle 11 also comprises a pin 40 shown diagrammatically in broken lines and designed to engage with appropriate hooking means used for its movement in the mill and its rotation.
- FIG 1 also shows a worker 13 holding in his hand a pistol 17 at the outlet end of which is fastened a cartridge 16 in the form of a sack with flexible wall and designed to be filled with a mixture of refractory substances with uncompressible fluid behavior once inserted in the casting channel.
- the refractory substances as set forth below, have the function of preventing deposit of metal on the walls of the casting channel 27 of the ladle, preventing the molten from occupying its space during filling of the ladle.
- the substances could comprise a refractory powder (for example, of graphite), in prior art use for filling the casting channel.
- the pistol 17 is connected through a tube or hose 24 to the pneumatic device 18 which has the function of injecting through the pistol inside the cartridge 16 the starting mixture coming from a special single-dose container 19 using the pneumatic energy supplied by a source of compressed air at the inlet 25.
- FIG 2 shows an enlargement of the pistol 17, the cartridge 16, the valve 14 of the ladle (shown diagrammatically) and the casting channel 27.
- the pistol 27 which receives the starting mixture from the hose 24 comprises a portion 23 on which are provided mixture injection operating means, a grip 20 and a distributor 21 shaped with an elongated form so as to be insertable into the passage 63 in the valve 14.
- the distributor 21 conveys the starting mixture into the shell 16a of the cartridge 16 which is fastened to the sleeve 29 of the cartridge by means of a clamp 30 opposite an inlet opening thereof for the powders.
- the sleeve 29 is fastened to the front end of the distributor 21 by means of appropriate hooking means (shown diagrammatically in FIG 2b ) before insertion of the cartridge in the ladle.
- a striker 22 designed to go and rest against the valve 14 when the cartridge has reached the right position in the casting channel.
- the shell 16a of the cartridge 16 is made of a deformable material such as to allow the shell to swell when the mixture of refractory substances is injected into it.
- the shell material is heat-resistant to withstand the relatively high temperatures of the casting channel 27 before beginning filling of the ladle. This allows operating even without complete cooling of the ladle, with benefit in the thermal balance of the casting operations and saving of waiting time for cooling.
- the shell could be made of a fiber-glass cloth resistant up to a temperature of even 600°C to 700°C. The higher the temperature to which the shell will resist, the shorter will be the time of waiting between the end of a casting and the next filling. By conventional methods, it was necessary to wait a long time before the ladle was sufficiently cold to allow the worker to apply the mixture in the casting channel from the inside of the ladle.
- the shell could even be made with plastic materials having high melting temperature and possibly even air-permeable.
- the valve 14 shown open in FIG 2 is fastened to the outer face of the bottom wall 61 of the ladle and comprises a fixed pierced plate 26 on the side towards the ladle and a movable pierced plate 25 handled by means of the cylinder 31.
- the valve 14 also comprises an elongated nozzle downstream from the movable plate and forming the passage 63 aligned with the casting channel 27 in the bottom wall 61.
- FIG 2b shows the pistol 17 before the cartridge 16 is fastened to its end 80.
- coupling means shown diagrammatically suited for engaging on the sleeve and on the clamp of the cartridge 16 to hold the shell 16a in the correct position during injection of the starting mixture and avoid the injection stream's pushing the cartridge towards the inside of the ladle.
- the sleeve 29 could advantageously form an escape path for the transport air, for example with a porous air-permeable portion but such as to withhold the refractory powder.
- FIG 3 shows the pistol 17 with the distributor 21 inserted in the passage inside the valve 14 and the cartridge 16 still empty inside the casting channel 27.
- the pistol is pushed by the worker until the striker 22 goes to rest on the lower end of the valve 14 and the cartridge 16 is arranged entirely beyond the movable plate 25 of the valve.
- the length of the distributor 21 is indeed sized according to the longitudinal extension of the valve 14 to terminate with its end at the height of the fixed plate 26 of the valve.
- the cartridge 16 is sized according to the dimensions of the channel 27 to occupy it along its entire length.
- the shell of the cartridge has its maximum volume not less than the volume of the casting channel 27 to have a correct and complete filling of the channel with the starting mixture and avoid molten metal penetrating into the channel before the beginning of the casting and being deposited there by solidification.
- FIG 4 shows the mixture injection step.
- the shell 16a receives the powder and swells to go and occupy all the volume of the casting channel and possibly also the bordering zones inside the ladle.
- the walls of the shell go to adhere to the walls of casting channel 27.
- the coupling means at the end of the distributor 21 appropriately hold back the cartridge 16 in the correct position in the channel in this step.
- the injection takes place with the ladle still rotated with the casting channel arranged horizontally.
- the pistol 17 is extracted from the valve 14 by tearing the sleeve 29 from the shell 16a of the cartridge which remains well jammed in the channel.
- the means of coupling to the end 80 of the manifold can comprise a hook which acts on the clamp 30 when the pistol is drawn from the valve, propitiating separation of the sleeve 29 from the shell 16a.
- valve 14 is closed as shown in the figure.
- the ladle is now raised and rotated vertically using the pin 40 and is positioned beneath a furnace and is ready to begin the filling cycle and the subsequent casting of the molten metal.
- FIG 6 shows the step in which the molten steel 42 is poured from the furnace 41 to the inside of the ladle 11 with the valve 14 closed.
- the mixture in the cartridge 16 remains well positioned in the channel 27 and prevents the metal from reaching that zone of the ladle for all the time necessary for its filling, without however spreading into other zones of the ladle.
- the mixture carries out its main function i.e. avoiding deposit of metal on the walls of the channel.
- the material making up the shell could be partly destroyed by the effect of the high temperature reached in this step.
- the ladle After the ladle has been filled, it is taken to the casting station, which can comprise for example, an ingot mold in accordance with known techniques in the steel mill field.
- the valve 14 is then opened and initially all the mixture, under the pressure of the molten metal in the ladle, comes out of the channel, after which casting of the molten steel begins.
- the mixture of refractory substances is distributed over all the width of the channel to cause adherence of the starting cartridge walls to those of the channel and adapting perfectly to the flared form typical of casting channels.
- the adduction of the powders in the cartridge could be secured with any known technique even as an alternative to air flow transportation as illustrated previously.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Charging Or Discharging (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Silicon Compounds (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
- This invention relates to a method for preparing a ladle for a cycle of filling and casting of molten metal and in particular steel and allowing avoiding obstruction of the casting channel of the ladle during the process. This invention also relates to a device for implementing said method.
- The problem related to the accidental stopping of the casting channel of the ladle used for feeding melted steel to the ingot mould and closable with a controlled valve generally of the valve type has been known in the steel mill field for a long time.
- Indeed, when the ladle is filled, part of the molten metal poured into it can solidify and be deposited on the walls of the casting channel. This phenomenon, if not appropriately opposed, can lead to complete obstruction of the channel and prevent casting and thus require interruption of the process.
- Accidental obstruction of the channel is quite unacceptable from the economic and technical viewpoints since it requires that the workers of the steel mill intervene manually (for example, with oxyhydrogen flame) to free the channel and immediately bring about flow of the molten metal.
- This intervention, in addition to slowing performance of the casting, endangers the physical safety of the workers who find themselves dangerously near to the flow of molten steel at the time of restarting of the casting so that it is extremely important to reduce to a the possible minimum the frequency of the occurrence.
- To solve the problem, it has been proposed to pour a mixture of refractory powders into the ladle before beginning filling it with molten steel. These powders would occupy the casting channel of the ladle closed by the valve to avoid the molten metal seeping into the channel before beginning casting and solidifying there because of the relatively low temperature of the channel (
NZ 280 990 A - The mixture, however, is poured by the worker into the casting channel on the bottom of the ladle from the upper inlet opening of the molten steel and does not always go to appropriately occupy the channel so that the obstruction phenomenon is not always opposed in a satisfactory manner and with a certain frequency the solid plug preventing flow of the molten steel can still form. The operation is also long and awkward and calls for intervention of specialized workers.
- It has also been proposed to insert a cylindrical tube into the casting channel from the outside of the ladle through the open channel valve. Before being inserted in the ladle the tube can be filled with granular refractory material and in use obstruct formation of the metal plug in the casting channel during filling of the ladle.
- But this tube adapts poorly to the typically flared form of the casting channel and cannot adhere to the walls of the channel. It is noted however that the cross section of the channel can vary from casting to casting due to its natural wear while making use of the prior art tubes inadequate still more disadvantageous.
- The general purpose of this invention is to remedy the above-mentioned shortcomings by making available a method for preparing a ladle for a filling and casting cycle allowing limiting to a minimum the possibility of obstruction of the casting channel of the ladle during processing and avoiding creation of situations dangerous for the workers of the mill.
- Another purpose is to make available a simple and economical device for implementation of said method.
- In view of this purpose it was sought to provide in accordance with this invention a method of preparing for a filling cycle and subsequent casting of molten metal a ladle comprising a casting channel closed by a plugging valve and comprising the steps of:
- opening the valve,
- inserting from the outside a deformable shell provided with an opening through the open valve inside the casting channel with the opening turned towards the valve with said shell having a maximum volume nearly equal to or greater than that of the casting channel,
- injecting from the outside a refractory substance with fluid behavior through the opening in the shell until swelling it and causing adherence of the walls of the shell to the channel wall, and
- closing the valve.
- Again in accordance with this invention it was sought to make available a device for application of a refractory substance with fluid behavior in the casting channel of a ladle closed by a plugging valve and comprising means of feeding the substance to a pistol provided with a distributor designed to be inserted into the passage of the valve to reach with its injection end the outlet of the channel with there being provided at said injection end means of connection for engagement with an inlet opening of a starting cartridge comprising a flexible shell designed to receive the substance coming from the distributor inside the channel.
- In addition in accordance with this invention it was sought to make available a cartridge designed to be inserted in the casting channel of a ladle through the plugging valve of the channel before filling of the ladle with molten metal and comprising a deformable shell having maximum volume nearly equal to or greater than the volume of the channel with the shell being provided with an opening through which once inserted in the channel it is designed to be filled with a refractory substance with fluid behavior until its walls do not adhere to the channel wall.
- To clarify the explanation of the innovative principles of this invention and its advantages compared with the prior art there is described below with the aid of the annexed drawings a possible embodiment thereof by way of non-limiting example applying said principles. In the drawings:
-
FIG 1 shows a view of a ladle just before application of the mixture designed to avoid deposit of metal on the walls of the casting channel of the ladle, -
FIG 2 shows an enlarged view of the ladle casting channel, the mixture injection pistol and the starting cartridge to be filled with the mixture attached to the end of the pistol, -
FIG 2b shows the pistol and the cartridge before their mutual engagement, -
FIG 3 shows a view similar to that ofFIG 2 with the cartridge inserted in the casting channel, -
FIG 4 shows a view of the cartridge inside the casting channel filled with the refractory mixture, -
FIG 5 shows a view with the pistol extracted from the valve of the ladle and the filled cartridge inside the ladle, and -
FIG 6 shows a view of the ladle while it is being filled with molten steel coming out of the furnace. - With reference to the figures,
FIG 1 shows aladle 11 provided withside walls 12a and 12b, anupper opening 62 for receiving the molten steel from the furnace (not shown) and abottom wall 61. Theladle 11, shown empty before the casting cycle, is supported with the side wall 12a on asupport 60 so that thebottom wall 61 is vertical. - On the
bottom wall 61 thecasting channel 27 is made opposite a wall part denominated 'seat-holding block'. On the outer face of thebottom 61 of the ladle opposite the outlet of thecasting channel 27 there is a plugging (or casting)valve 14 made like a valve in accordance with techniques known in the steel-mill field. - The
ladle 11 also comprises apin 40 shown diagrammatically in broken lines and designed to engage with appropriate hooking means used for its movement in the mill and its rotation. -
FIG 1 also shows aworker 13 holding in his hand apistol 17 at the outlet end of which is fastened acartridge 16 in the form of a sack with flexible wall and designed to be filled with a mixture of refractory substances with uncompressible fluid behavior once inserted in the casting channel. The refractory substances, as set forth below, have the function of preventing deposit of metal on the walls of thecasting channel 27 of the ladle, preventing the molten from occupying its space during filling of the ladle. The substances could comprise a refractory powder (for example, of graphite), in prior art use for filling the casting channel. - The
pistol 17 is connected through a tube orhose 24 to thepneumatic device 18 which has the function of injecting through the pistol inside thecartridge 16 the starting mixture coming from a special single-dose container 19 using the pneumatic energy supplied by a source of compressed air at theinlet 25. -
FIG 2 shows an enlargement of thepistol 17, thecartridge 16, thevalve 14 of the ladle (shown diagrammatically) and thecasting channel 27. - The
pistol 27 which receives the starting mixture from thehose 24 comprises aportion 23 on which are provided mixture injection operating means, agrip 20 and adistributor 21 shaped with an elongated form so as to be insertable into thepassage 63 in thevalve 14. - At the time of injection the
distributor 21 conveys the starting mixture into theshell 16a of thecartridge 16 which is fastened to thesleeve 29 of the cartridge by means of aclamp 30 opposite an inlet opening thereof for the powders. - The
sleeve 29 is fastened to the front end of thedistributor 21 by means of appropriate hooking means (shown diagrammatically inFIG 2b ) before insertion of the cartridge in the ladle. - On the
distributor 21 is installed astriker 22 designed to go and rest against thevalve 14 when the cartridge has reached the right position in the casting channel. - The
shell 16a of thecartridge 16 is made of a deformable material such as to allow the shell to swell when the mixture of refractory substances is injected into it. The shell material is heat-resistant to withstand the relatively high temperatures of thecasting channel 27 before beginning filling of the ladle. This allows operating even without complete cooling of the ladle, with benefit in the thermal balance of the casting operations and saving of waiting time for cooling. - The shell could be made of a fiber-glass cloth resistant up to a temperature of even 600°C to 700°C. The higher the temperature to which the shell will resist, the shorter will be the time of waiting between the end of a casting and the next filling. By conventional methods, it was necessary to wait a long time before the ladle was sufficiently cold to allow the worker to apply the mixture in the casting channel from the inside of the ladle.
- The shell could even be made with plastic materials having high melting temperature and possibly even air-permeable.
- The
valve 14 shown open inFIG 2 is fastened to the outer face of thebottom wall 61 of the ladle and comprises a fixedpierced plate 26 on the side towards the ladle and a movablepierced plate 25 handled by means of thecylinder 31. Thevalve 14 also comprises an elongated nozzle downstream from the movable plate and forming thepassage 63 aligned with thecasting channel 27 in thebottom wall 61. -
FIG 2b shows thepistol 17 before thecartridge 16 is fastened to itsend 80. As already mentioned, on theend 80 of thedistributor 21 are coupling means (shown diagrammatically) suited for engaging on the sleeve and on the clamp of thecartridge 16 to hold theshell 16a in the correct position during injection of the starting mixture and avoid the injection stream's pushing the cartridge towards the inside of the ladle. - In case of feeding of powders with compressed-air transport it is noted that the
sleeve 29 could advantageously form an escape path for the transport air, for example with a porous air-permeable portion but such as to withhold the refractory powder. -
FIG 3 shows thepistol 17 with thedistributor 21 inserted in the passage inside thevalve 14 and thecartridge 16 still empty inside thecasting channel 27. The pistol is pushed by the worker until thestriker 22 goes to rest on the lower end of thevalve 14 and thecartridge 16 is arranged entirely beyond themovable plate 25 of the valve. The length of thedistributor 21 is indeed sized according to the longitudinal extension of thevalve 14 to terminate with its end at the height of thefixed plate 26 of the valve. Thecartridge 16 is sized according to the dimensions of thechannel 27 to occupy it along its entire length. In particular, the shell of the cartridge has its maximum volume not less than the volume of thecasting channel 27 to have a correct and complete filling of the channel with the starting mixture and avoid molten metal penetrating into the channel before the beginning of the casting and being deposited there by solidification. - In the configuration of
FIG 3 the worker is ready to inject the mixture into the cartridge by operating the pistol. -
FIG 4 shows the mixture injection step. Theshell 16a receives the powder and swells to go and occupy all the volume of the casting channel and possibly also the bordering zones inside the ladle. The walls of the shell go to adhere to the walls of castingchannel 27. The coupling means at the end of thedistributor 21 appropriately hold back thecartridge 16 in the correct position in the channel in this step. - Advantageously but not necessarily the injection takes place with the ladle still rotated with the casting channel arranged horizontally.
- After injection of the mixture fed in the correct quantity into the single-
dose container 19 applied to the pneumatic device 18 (nearly equal to the maximum volume of theshell 16a) thepistol 17 is extracted from thevalve 14 by tearing thesleeve 29 from theshell 16a of the cartridge which remains well jammed in the channel. - Advantageously the means of coupling to the
end 80 of the manifold can comprise a hook which acts on theclamp 30 when the pistol is drawn from the valve, propitiating separation of thesleeve 29 from theshell 16a. - The pistol being extracted, the
valve 14 is closed as shown in the figure. - The ladle is now raised and rotated vertically using the
pin 40 and is positioned beneath a furnace and is ready to begin the filling cycle and the subsequent casting of the molten metal. -
FIG 6 shows the step in which themolten steel 42 is poured from thefurnace 41 to the inside of theladle 11 with thevalve 14 closed. In this step the mixture in thecartridge 16 remains well positioned in thechannel 27 and prevents the metal from reaching that zone of the ladle for all the time necessary for its filling, without however spreading into other zones of the ladle. In this step, the mixture carries out its main function i.e. avoiding deposit of metal on the walls of the channel. The material making up the shell could be partly destroyed by the effect of the high temperature reached in this step. - After the ladle has been filled, it is taken to the casting station, which can comprise for example, an ingot mold in accordance with known techniques in the steel mill field. The
valve 14 is then opened and initially all the mixture, under the pressure of the molten metal in the ladle, comes out of the channel, after which casting of the molten steel begins. - It is now clear that the preset purposes have been achieved. Indeed, a method of preparing a ladle for a filling and casting cycle is made available avoiding obstruction of the casting channel in an economical, simple, rapid and simple manner and especially a manner not dangerous for the steel mill workers. Indeed, the mixture of starting refractory substances, thanks to the special procedure proposed in accordance with this invention is positioned selectively in the critical zone of the ladle (the casting channel) and can carry out its function in a more satisfactory manner compared with what happened in the prior art when it was poured from above into the ladle and not always went to occupy the channel satisfactorily. Accidental obstruction of the lower channel has been observed with a frequency lower than that experienced in case of filling of the channel with traditional methods.
- In addition, thanks to the innovative method in accordance with this invention, the mixture of refractory substances is distributed over all the width of the channel to cause adherence of the starting cartridge walls to those of the channel and adapting perfectly to the flared form typical of casting channels.
- Again, it was possible to reduce the waiting time between the end of a casting and the subsequent filling of the ladle to enable application of the mixture with the ladle at relative high temperature.
- In addition, a simple and convenient device to be used for implementing the above method is made available to the worker for preparing the ladle for the processing cycle easily and in a short time.
- Naturally the above description of an embodiment applying the innovative principles of this invention is given by way of non-limiting example of said principles within the scope of the exclusive right claimed here.
- In particular, the adduction of the powders in the cartridge could be secured with any known technique even as an alternative to air flow transportation as illustrated previously.
Claims (15)
- Method of preparing for a filling cycle and subsequent casting of molten metal a ladle comprising a casting channel (27) closed by a plugging valve (14) and comprising the steps of:- opening the valve,- inserting from the outside a deformable shell (16a) provided with an opening through the open valve (14) inside the casting channel (27) with the opening turned towards the valve and with said shell having a maximum volume nearly equal to or greater than that of the casting channel,- injecting from the outside a refractory substance with fluid behavior through the opening in the shell (16a) to swell it and cause adherence of the walls of the shell to the channel wall (27), and- closing the valve (14).
- Method in accordance with claim 1 characterized in that said shell (16a) is made of heat-resistant material.
- Method in accordance with claim 1 characterized in that said shell (16a) has a maximum volume slightly greater than the volume of the channel (27).
- Method in accordance with claim 1 characterized in that said substances are powders.
- Method in accordance with claim 1 characterized in that said substances are injected into the shell by means of a pneumatic device (18).
- Method in accordance with claim 1 characterized in that the ladle (11) is rotated with the casting channel (27) arranged horizontally during filling of the shell (16a).
- Method in accordance with claim 1 characterized in that before being inserted in the channel (27) the shell (16a) is fastened at its opening to the injection end (80) of a pistol (17) designed to inject the refractory substance with the shell being pushed with the pistol to be inserted inside the casting channel and being held in the channel at the time of injection by the pistol fastening effect.
- Device for application of a refractory substance with fluid behavior in the casting channel (27) of a ladle (11) closed by a plugging valve (14) and comprising means of feeding (18) the substance to a pistol (17) provided with a distributor (21) designed to be inserted into the passage of the valve (14) to reach with its injection end (80) the outlet of the channel with there being provided at said injecting end (80) coupling means for engagement with an inlet opening of a starting cartridge (16) comprising a flexible shell (16a) designed to receive the substance coming from the distributor (21) inside the channel (27).
- Device in accordance with claim 8 characterized in that the means (18) of feeding the refractory substance are pneumatic.
- Device in accordance with claim 8 characterized in that on the pistol distributor (21) there is provided a flange (22) designed to go and rest against the plugging valve (14) when the injection end (80) of the distributor (21) s at the outlet height of the casting channel (27).
- Cartridge designed to be inserted in the casting channel (27) of a ladle through the plugging valve (14) of the channel before filling of the ladle with molten metal and comprising a deformable shell having maximum volume nearly equal to or greater than the volume of the channel with the shell (16a) being provided with an opening through which once inserted in the channel it is designed to be filled with a refractory substance with fluid behavior until its walls do not adhere to the channel wall.
- Cartridge in accordance with claim 11 characterized in that the cartridge is provided with coupling means designed to engage with the injection end a distributor of the refractory substance at the inlet opening of the shell.
- Cartridge in accordance with claim 12 characterized in that the coupling means are made up of a sleeve to which the shell (16a) is constrained by means of a clamp at its opening.
- Cartridge in accordance with claim 11 characterized in that the shell (16a) is made of heat-resistance material.
- Cartridge in accordance with claim 11 characterized in that the shell is made with fiber-glass cloth.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT001039A ITMI20051039A1 (en) | 2005-06-03 | 2005-06-03 | METHOD FOR THE PREPARATION OF A SIVIERA WITH A FILLING AND CASTING CYCLE AND DEVICE TO IMPLEMENT THIS METHOD |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1728572A1 EP1728572A1 (en) | 2006-12-06 |
EP1728572B1 true EP1728572B1 (en) | 2008-07-09 |
Family
ID=36942247
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06010944A Not-in-force EP1728572B1 (en) | 2005-06-03 | 2006-05-26 | Ladle plugging method and applicator device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1728572B1 (en) |
AT (1) | ATE400384T1 (en) |
DE (1) | DE602006001688D1 (en) |
IT (1) | ITMI20051039A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI120385B (en) * | 2007-07-06 | 2009-10-15 | Indref Oy | Sealing mechanism for metering of metal melt and method for manufacturing a sealing mechanism |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ280990A (en) * | 1995-02-16 | 1997-11-24 | Laporte Group Australia Ltd | Casting ladle device; apparatus and method for inserting sand into the nozzle and base portions of a ladle, elongate tool introduces sand filled container via nozzle orifice |
-
2005
- 2005-06-03 IT IT001039A patent/ITMI20051039A1/en unknown
-
2006
- 2006-05-26 DE DE602006001688T patent/DE602006001688D1/en active Active
- 2006-05-26 EP EP06010944A patent/EP1728572B1/en not_active Not-in-force
- 2006-05-26 AT AT06010944T patent/ATE400384T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ATE400384T1 (en) | 2008-07-15 |
EP1728572A1 (en) | 2006-12-06 |
DE602006001688D1 (en) | 2008-08-21 |
ITMI20051039A1 (en) | 2006-12-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FI75866C (en) | Device for adding substances to a liquid | |
GB2040196A (en) | Hot chamber diecasting | |
EP1728572B1 (en) | Ladle plugging method and applicator device | |
GB1581058A (en) | Steel casting | |
TWI602630B (en) | Methods and systems for producing or processing very pure alloy steel | |
WO1980001659A1 (en) | Metallurgical pouring vessels | |
JP2002535149A (en) | Casting method and apparatus | |
CN209716461U (en) | Water-coating port apparatus for baking in a kind of auxiliary | |
WO2014002252A1 (en) | Method for starting supply of molten steel | |
US6426037B1 (en) | Dosing chamber method and apparatus | |
US3944116A (en) | Process and device for aiding in opening the tundish nozzle in a continuous casting system | |
JP2014237161A (en) | Ladle having hydraulic regeneration bomb | |
JPS63502601A (en) | Injection of substances into hot liquids | |
JP6175286B2 (en) | Ladle with pressure cylinder | |
EP0286436B1 (en) | Improvements in sealing injection apparatus for injecting substances into molten metals | |
JP2005211904A (en) | Apparatus for supplying molten metal | |
CN208879696U (en) | A kind of tundish lower nozzle apparatus for baking | |
EP1329271A1 (en) | Apparatus to facilitate opening of molten metal casting vessel | |
JPH11320043A (en) | Continuous casting equipment and continuous casting method | |
GB2091399A (en) | Tundish pouring apparatus and method of use | |
JP3952667B2 (en) | Repair method for tuyere receiving brick | |
JP6171138B2 (en) | Melt outflow method in molten metal container | |
JPS6159828B2 (en) | ||
IT202100008438A1 (en) | APPARATUS AND METHOD FOR INTRODUCING CHROMITE SAND INTO THE UNLOADER OF A LADLE | |
JPH05329623A (en) | Method for preventing nozzle clogging in molten metal vessel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
17P | Request for examination filed |
Effective date: 20070605 |
|
AKX | Designation fees paid |
Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 602006001688 Country of ref document: DE Date of ref document: 20080821 Kind code of ref document: P |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: GR Ref legal event code: EP Ref document number: 20080402687 Country of ref document: GR |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081109 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081209 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081009 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081020 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 |
|
26N | No opposition filed |
Effective date: 20090414 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20081009 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090526 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20100526 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: AEN Free format text: DAS PATENT IST AUFGRUND DES WEITERBEHANDLUNGSANTRAGS VOM 08.02.2011 REAKTIVIERT WORDEN. Ref country code: CH Ref legal event code: NV Representative=s name: BOHEST AG |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100531 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100531 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090526 |
|
PGRI | Patent reinstated in contracting state [announced from national office to epo] |
Ref country code: CH Effective date: 20110208 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20090110 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20100526 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PUE Owner name: COM. IN. S.R.L. Free format text: MASNATA, GIO BATTA#LOC. SEMENTELLA 5#16010 SAVIGNONE GE (IT) -TRANSFER TO- COM. IN. S.R.L.#VIA ANTONIO PACINOTTI, 8#52100 TERNI (IT) |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20080709 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: TP Owner name: COM. IN. S.R.L., IT Effective date: 20111011 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 602006001688 Country of ref document: DE Representative=s name: MUELLER SCHUPFNER & PARTNER PATENT- UND RECHTS, DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R082 Ref document number: 602006001688 Country of ref document: DE Representative=s name: MUELLER SCHUPFNER & PARTNER PATENT- UND RECHTS, DE Effective date: 20120210 Ref country code: DE Ref legal event code: R081 Ref document number: 602006001688 Country of ref document: DE Owner name: COM. IN. S.R.L., IT Free format text: FORMER OWNER: MASNATA, GIO BATTA, SAVIGNONE, IT Effective date: 20120210 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20130514 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20130531 Year of fee payment: 8 Ref country code: GR Payment date: 20130412 Year of fee payment: 8 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PCAR Free format text: NEW ADDRESS: HOLBEINSTRASSE 36-38, 4051 BASEL (CH) |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20141203 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140531 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140531 |
|
REG | Reference to a national code |
Ref country code: GR Ref legal event code: ML Ref document number: 20080402687 Country of ref document: GR Effective date: 20141203 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: PLFP Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20150519 Year of fee payment: 10 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20150508 Year of fee payment: 10 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602006001688 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20170131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160531 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20161201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20140531 |