EP1181491A1 - Metallurgisches gefäss mit einer abstichvorrichtung und verfahren zum kontrollierten, schlackenfreien abziehen von flüssigem metall aus diesem gefäss - Google Patents
Metallurgisches gefäss mit einer abstichvorrichtung und verfahren zum kontrollierten, schlackenfreien abziehen von flüssigem metall aus diesem gefässInfo
- Publication number
- EP1181491A1 EP1181491A1 EP00925154A EP00925154A EP1181491A1 EP 1181491 A1 EP1181491 A1 EP 1181491A1 EP 00925154 A EP00925154 A EP 00925154A EP 00925154 A EP00925154 A EP 00925154A EP 1181491 A1 EP1181491 A1 EP 1181491A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leg
- vessel
- metallurgical vessel
- vessel according
- tapping
- 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.)
- Granted
Links
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 76
- 239000002184 metal Substances 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims description 50
- 238000000605 extraction Methods 0.000 title abstract 2
- 230000008569 process Effects 0.000 claims description 35
- 239000002893 slag Substances 0.000 claims description 22
- 229910001338 liquidmetal Inorganic materials 0.000 claims description 21
- 238000009423 ventilation Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 10
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000011819 refractory material Substances 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 abstract description 5
- 239000000155 melt Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 10
- 238000001816 cooling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101100493711 Caenorhabditis elegans bath-41 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001104043 Syringa Species 0.000 description 1
- 235000004338 Syringa vulgaris Nutrition 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D39/00—Equipment for supplying molten metal in rations
- B22D39/003—Equipment for supplying molten metal in rations using electromagnetic field
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/113—Treating the molten metal by vacuum treating
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/19—Arrangements of devices for discharging
-
- 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
- F27D3/1545—Equipment for removing or retaining slag
- F27D3/159—Equipment for removing or retaining slag for retaining slag during the pouring of the metal or retaining metal during the pouring of the slag
-
- 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
- F27D2003/0034—Means for moving, conveying, transporting the charge in the furnace or in the charging facilities
- F27D2003/0054—Means to move molten metal, e.g. electromagnetic pump
- F27D2003/0056—Means to move molten metal, e.g. electromagnetic pump through a syphon in a vacuum chamber, e.g. involving aspiration or pressure on the bath
-
- 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
- F27D9/00—Cooling of furnaces or of charges therein
Definitions
- the invention relates to a metallurgical vessel with a tapping device for the controlled, slag-free removal of liquid metal according to the preamble of claim 1. It also relates to a method using such a tapping device.
- WO 86/04980 discloses a device and a method for transferring a predetermined amount of liquid metal from a receptacle containing a molten metal bath by means of a refractory-lined drain pipe, in which the principle of a liquid lifter is used.
- the drain pipe is in the form of an inverted U or V with two legs pointing downwards, the first of which has an inlet opening and the second has an outlet opening for the liquid metal which can be closed in a gas-tight manner by a closure device.
- a fire-resistant, lined pipe socket which can be connected to a vacuum device and can optionally be connected to the vacuum device via a first valve or to the free atmosphere via a second valve.
- the first leg of the drain pipe is immersed in the molten metal bath, the second valve, which acts as a ventilation valve, is closed and the first Valve for connecting the drain pipe to the vacuum device opened.
- the metal melt in the first leg is drawn up by the vacuum suction of the vacuum device and runs over an overflow edge in the connection area of the two legs into the second Leg.
- the closure device of the second leg is opened and the liquid metal is transferred into the receptacle, preferably a pan, according to the principle of the liquid lifter.
- the flow through the drain channel can be interrupted, so that a controlled, slag-free removal of the molten metal is possible.
- the inlet opening is closed by a sheet metal before immersion in the molten metal bath, which melts after immersion and exposes the inlet opening .
- granular ff-material is filled into the second leg before the furnace vessel is tapped, which otherwise has a narrowing in the lower region.
- a siphon for emptying thermal baths has become known, in which an ejector nozzle is installed in the suction tube surrounded by a heating jacket and is heated together with the suction tube. A negative pressure is generated by the ejector nozzle, with which the process for the controlled withdrawal of the liquid from the vessel is initiated.
- one leg of the drain pipe which is designed in the form of an inverted U or V, is immersed in the molten metal bath.
- the upper deflection area of the drain pipe lies above the edge of the vessel.
- the molten metal must therefore be raised to initiate the tapping process by more than the height difference between the vessel edge and the molten metal level.
- the object of the invention is to enable a safe, controlled, slag-free removal of liquid metal in a metallurgical vessel with a tapping device according to the preamble of claim 1, regardless of the vessel size.
- Various modifications of the tapping device are to be specified in which it is possible to initiate the tapping process with a low vacuum or even without a vacuum, so that a vacuum device is unnecessary.
- a method for the controlled removal of slag-free liquid metal from a metallurgical vessel is to be specified using such a device.
- the metallurgical vessel according to the invention with a tapping device is characterized by the features of claim 1.
- Advantageous embodiments of the tapping device can be found in claims 2 to 28.
- the method according to the invention is characterized by the features of claim 29.
- Advantageous embodiments of this method can be found in the remaining claims.
- the drain channel is integrated with one leg into the vessel wall and the height of the overflow edge in the connection area of the two legs of the drain channel is determined so that even with the large specific weight of a molten metal to initiate and carry out the tapping process, only a slight negative pressure of a vacuum device is required or the vacuum device for initiating the tapping process can be dispensed with.
- a rapid termination of the tapping process is possible at any time by a pressure equalization between the free atmosphere and the connecting area of the two legs, preferably via a ventilation valve or by actuating the closure device, so that it can be ensured that none of the liquid metal is drawn off Slag is drawn from the slag layer floating on the molten metal.
- Fig. 1 shows a metallurgical vessel with a tapping device in section
- FIG. 3 shows the part of a tiltable vessel containing the tapping device in the non-tilted state in a representation corresponding to FIG. 2 with a modified form of the drainage channel
- Fig. 5 shows the part of the tiltable vessel shown in Fig. 3 in the tilted state.
- the furnace vessel 1 of an arc furnace is shown in section in FIG. 1.
- the furnace vessel 1 consists of a vessel lower part 2, which forms the brick oven hearth, for receiving the melt 3, and of an upper vessel part 4, which is formed from water-cooled elements.
- a tapping device 5 on the left side of the furnace vessel and on the right side a slag opening 7 which can be closed by means of a slag door 6.
- the bottom of the lower part 2 of the vessel falls towards the tapping device 5.
- the furnace vessel can be designed to be tiltable in the direction of the tapping device 5 in a known manner.
- the tapping device according to the invention does not require the vessel to be tilted, so that constructive measures for tilting the furnace vessel and, in the case of scrap preheating shafts, for lifting the shaft before the furnace vessel is tilted are unnecessary.
- the water cooling elements on the tapping side can also be the same long as the other water cooling elements are formed, so that further savings in refractory material in the vessel wall are possible.
- the tapping device 5 which is designed according to the principle of a liquid siphon, contains a drainage channel 10 surrounded by a refractory material, which is designed in the form of an inverted V with two legs 11 and 12 connected downwards and connected at the top is.
- a refractory material which is designed in the form of an inverted V with two legs 11 and 12 connected downwards and connected at the top is.
- an overflow edge 14 for the liquid metal 3 is defined within the drain channel 10.
- the first leg 11 of the drain channel penetrates the refractory vessel wall 15 of the lower vessel part 2 as seen from the inside of the furnace, rising obliquely.
- the second leg 12 lies outside of the furnace vessel 1 and points parallel downwards to the vessel wall 15.
- the area of the tapping device 5 lying outside the refractory vessel wall 15 is connected by means of a flange 16 to the section of the drainage channel 10 penetrating the refractory vessel wall.
- the first leg 11 of the drain channel 10 has an inlet opening 17 with an upper edge 18 through which a height hO is defined.
- the second leg 12 of the drain channel 10 has a closable by a closure device 19 outlet opening 20 for the liquid metal 3, which is lower than the upper edge 18 of the inlet opening 17 of the drain channel 10 at a height denoted by hA.
- the closure device 19 is only shown schematically by a closure plate 21, which can be repeatedly moved by means of a drive from a closed position adjacent to the edge of the outlet opening 20 into a release position releasing the outlet opening 20 and from the release position into the closed position. If the tapping process is initiated via a residual amount retained in the second leg 12 from the previous tapping process or an overflow amount of the metal melt 3 previously flowed over the overflow edge 14 of the drainage channel, then there are no special requirements with regard to the tightness of the closure by the closure device.
- the second leg 12 of the drainage channel 10 is extended at the bottom by a protective tube 22 which, when the furnace vessel 1 is tapped, surrounds the metal jet into a pan and thus shields it from the free atmosphere.
- the flow cross section of the drainage channel is designed to be relatively large and shortly before the outlet opening 20 a section 23 with a reduced flow cross section which limits the flow is provided. Since this section is particularly stressed due to the higher flow rate, it is designed as an independent, replaceable section (not shown).
- the flow cross-section of the drainage channel is rectangular or oval with a greater width than height, at least in the area of the inlet opening 17 of the first leg 11.
- the refractory material surrounding the drain channel or a metal melt located in the drain channel is by means of a Heater heated.
- inductive heating is provided by means of a first induction coil 24 surrounding the first leg 11 of the drain channel 10 and a second induction coil 25 surrounding the second leg 12 of the drain channel 10.
- the induction coils can be supplied with alternating current separately, so that a metal melt located in the first leg 11 or in the second leg 12 can be heated as required.
- Insulating layers 26 are provided between the turns of the induction coils 24 and 25 and the legs 11 and 12 of the fireproof-lined drain channel 10 in order to reduce the heat flow from the drain channel to the cooled turns of the induction coils 24 and 25.
- the force-cooled windings of the induction coils 24 and 25 can also be used to cool a molten metal retained in the drainage channel.
- the insulating layers 26 are dispensed with.
- connection area 13 of the two legs 11 and 12 of the drainage channel 10 pipe connections 27 and 28 are provided in the embodiment aligned with the leg in question and lined with ff material.
- the first pipe socket 27 aligned with the first leg 11 can be closed gas-tight by means of a flange 29.
- the second pipe socket 28 aligned with the second leg 12 can be connected to at least one external device via a second flange 30.
- the second flange 30 is provided with a connecting pipe 31, to which a vacuum device 39 symbolically shown in FIG. 2 can be connected via a first valve 32.
- a second valve which is referred to as a ventilation valve 33, since a connection to the free atmosphere can be made when this valve is opened.
- refractory plugs 34 and 35 are attached to the inside of the flanges 29 and 30.
- the interior of the legs 11 and 12 aligned with the pipe socket in question is accessible for inspection and maintenance purposes.
- At least one of the pipe sockets can also be used, either in place of the induction heating or in addition to this, a burner as a heating device for the drain channel or one located in the drain channel. to connect molten metal.
- Fig. 2 which shows the part of the vessel containing the tapping device in an enlarged view, some modifications and additional devices are shown which favor the operation of the tapping device in some variants.
- a porous flushing plug 36 which can be connected to a compressed gas source via a compressed gas line and which opens into the discharge channel 10 from below in order to introduce a gas, preferably an inert gas such as argon.
- a gas preferably an inert gas such as argon.
- solidification of the melt in this leg can be prevented by providing a second porous sink 37, which can be connected to a compressed gas source via a compressed gas line, in the vicinity of the discharge channel inlet opening 17 opens at the top of the drainage channel, and with which a circulation of the liquid metal in the first leg 11 can be achieved.
- a second porous sink 37 which can be connected to a compressed gas source via a compressed gas line, in the vicinity of the discharge channel inlet opening 17 opens at the top of the drainage channel, and with which a circulation of the liquid metal in the first leg 11 can be achieved.
- hot metal is conducted from the vessel 2 into the colder area of the first leg, and thus counteracts freezing in this area.
- a porous sink in the bottom of the lower part 2 of the vessel for example at a location similar to the bottom tapping 9 near the drain channel inlet opening 17, in order to counteract cooling by circulation in this area.
- the bath level h4 in the connection area 13 of the drainage channel 10 is raised so far that it enters the supply line to the vacuum device or into one of the 2 connected with the reference numeral 40 is provided for detecting and controlling the height of the bath level h4 in the connecting area 13 of the two legs 11 and 12 of the drain channel 10.
- This device 40 contains one, the height of the bath level h4 level detector 1 whose output signal via a control circuit z. B. regulates the vacuum of the vacuum device 39.
- the negative pressure acting in the connecting area 13 of the two legs 11 and 12 can also be controlled using a vacuum device 39 which supplies a constant negative pressure in that the control signals supplied by the level sensor are fed to a control valve 38, through which false air is controlled in the suction area of the vacuum device 39 Maintenance of the level h4 set as Sollwe ⁇ is supplied.
- the control device for maintaining a predetermined height of the bath level h4 is unnecessary if the length of the pipe socket 27 and 28 is dimensioned so large that the endangered elements are always above the maximum suction head of the molten metal.
- the tapping device 5 is designed and operated so that the second leg is completely emptied at each tapping, then, as is known from the introduction WO 86/04980, after tapping and reclosing the outlet opening 20 of the drainage channel 10 by means of the closure plate 21 granular ff material filled into the second leg from above.
- the second pipe socket 28, which is aligned with the second leg 12 of the drain channel 10 is used to connect a container with granular ff material as an external device via a suitable feed line and metering device.
- the connecting pipe 31 for connecting a vacuum device and the possibility of connecting to the free atmosphere via the ventilation valve 33 can then be assigned to the first flange 29, which is aligned with the first leg 11 of the drainage channel 10.
- the height information h1 to h7 and hA entered in FIG. 1 play a role here.
- the definitions for this height information already given in the description are summarized and supplemented again below.
- the height specifications relate to the tilted as well as to the non-tilted state (cf. FIGS. 3 and 5).
- the height h2 of the overflow edge 14 is approximately at the same level as the maximum permissible bath level h3 of the molten metal 3. Since the slag layer 41 is loaded on the molten metal 3 in the vessel 1, the height h4 is the level of the bath the molten metal 3 in the drainage channel is slightly larger than h3. This means that shortly before reaching the maximum bath level h3 in the vessel 1 melt overflows from the first leg 11 into the second leg 12 and fills this leg of the drain channel 10. This state shortly before tapping is shown in Fig. 1. The free volume in the connection area 13 is kept small due to a small difference between the heights h6 and h4.
- the tapping process must therefore be ended when the bath level of the molten metal 3 has reached the height h7.
- the tapping process can be ended either by closing the outlet opening 20 of the drainage channel 10 by means of a suitable closure device 19, by opening the ventilation valve 33, i. H.
- the second leg 12 remains at least partially filled with a residual amount of molten metal. In the other cases, the second leg 12 is emptied completely.
- an amount of melt present in the second leg 12 is sufficient for the initiation and execution of the tapping process, if that occurs when this occurs
- the tapping process can be carried out at the height relationships shown in FIG. 1, as described, without the use of a vacuum device solely by means of the remaining amount or in the second leg 12 Overflow amount of melt take place, which may have to be brought into a liquid state by the heating device 24, 25.
- the height h2 of the overflow edge 14 is arranged lower than the height h3 of the maximum molten pool level, then an overflow of the molten metal 3 into the second leg 12 is also ensured if the molten metal bath level in the Vessel 1 is below the maximum height h3, namely until the bath level of the molten metal has approximately reached the height h2.
- a reliable initiation of the tapping process by pulling the melt out of the first leg is always guaranteed.
- the overflow edge 14 is set lower, when the material in the vessel 1 melts, the overflow into the second leg 12 takes place some time before the maximum bath level h3 is reached, and it must be done here preferably by inductive heating and / or introducing a gas via the sink 37 or 36 a cooling and solidification of the melt can be counteracted.
- the lowest limit for the height h2 of the overflow edge 14 is the height hO of the upper edge 18 of the drain channel inlet opening 17.
- the height h7 is preferably not fallen below, ie the following should apply: h2> h7. In the case of a tiltable furnace vessel, these height specifications relate to the tilted state.
- a vacuum device is required to initiate the tapping process, which can be connected to the connecting channel 31 via the valve 32 in the example shown.
- the vacuum device must be dimensioned according to the liquid metal column to be lifted. Lower suction pressures could also be achieved by ejector nozzles based on the principle of DE-C 605 701 mentioned in the introduction. A slight lifting of the bath level in the first leg can also be achieved by introducing gas through the porous sink 36 or 37 due to the pulling effect.
- a tapping process with the tapping device 5 shown in FIG. 1 is described below.
- the outlet opening 20 of the drainage channel 10 is closed and granular ff material is poured into the lower section of the second leg 12.
- the melting furnace 1 has been charged with feed material and the next batch is melted down.
- the induction coil 24 is supplied with current and / or gas is introduced through the sink 37 or 36.
- the melt flows from the first leg 11 via the overflow edge 14 into the second leg 12 and fills it, here too by supplying the induction coil 25 with current, ie. H. inductive heating of the melt, cooling is prevented.
- the ventilation valve 33 is opened in order to prevent pressure build-up in the connection area 13 of the two legs 11 and 12.
- the ventilation valve 33 is closed again and by opening the Locking device initiated the tapping process. With the overflow amount flowing out in the second leg 12, melt is drawn from the first leg 11 and the furnace vessel until the height h7 is reached.
- the ventilation valve 33 By opening the ventilation valve 33, the removal process is interrupted by supplying the wrong air in order to prevent the slag from being drawn in. A quantity of liquid metal corresponding to the bath level remains in the vessel as a sump.
- the jet can be interrupted by means of the closure device 19, so that a residual amount of liquid metal is retained in the second leg 12.
- a bath level h4 which has dropped in the first leg 11 of the drainage channel below the level of the overflow edge 14 can be used to initiate a new tapping process by means of the vacuum device, possibly including the level control by means of the level sensor of the device 40 and / or by introducing gas through the porous sink 36 raise the overflow edge 14.
- Parts which correspond to those of the vessel according to FIG. 1 or 2 are designated with reference numerals enlarged by the number 100 - has a tapping device 105 which is modified compared to the metallurgical vessel of FIG. 1.
- the first leg 111 of the drainage channel 110 penetrating the refractory vessel wall 115 of the vessel lower part 102 has a horizontal first section li la and a vertical second section 111b, which is connected to the second leg 112 via an enlarged connecting region 113.
- the overflow edge 114 of the drainage channel 110 is set lower and, instead of a gas-tight seal above the enlarged connection area 113, a cover 143 is provided with a burner 144 penetrating the cover, with which the enlarged connection area or a metal melt present in it can be heated.
- the closure of the connection region 113 caused by the cover 143 can be made gas-tight. However, this is not a necessary condition, since lowering the overflow edge 114 also results in a slag-free tapping can be initiated and carried out if the connection region 113 is not sealed airtight by the cover 143.
- the flow velocity of the metal at the discharge channel inlet opening 117 which is limited by the section 123 with a reduced flow cross section, can be kept low, and on the other hand the upper edge 118 of the discharge channel inlet opening 117 can be displaced further downward than in the case of a round cross section of the discharge channel inlet opening 117 .
- the ratio between the cross section of the discharge channel inlet opening 117 and the cross section of the flow-restricting section 123 is approximately 4: 1.
- the horizontal configuration of the first section lilac in the embodiment according to FIGS. 3 to 5 has the advantage that the right-angled configuration of the upper edge 118 achieves a higher stability, so that Even after several hundred taps, the upper edge 118 of the drain channel inlet opening 117 is only insignificantly displaced upwards by the wear.
- the metallurgical vessel shown in FIGS. 3 to 5 is designed to be tiltable.
- Fig. 3 shows the zero or working position of the vessel and
- Fig. 5 shows the tilted position.
- the tilt angle is between three and five degrees.
- the maximum tilted state is decisive for determining the minimum height of the overflow edge 114, that is, in the tilted state shown in FIG. 5, the height h2 of the overflow edge 114 must not be below to ensure a slag-free tapping of the height h7, at which slag 141 floating on the molten metal 103 is drawn into the drainage channel 110 via the upper edge 118 of the drainage channel inlet opening 117 by means of inlet swirls.
- the height h2 of the overflow edge 114 is approximately at the level of the bath level h7 or only slightly higher, then the slag-free tapping up to the level h7 of a metal melt 103 remaining in the vessel 101 can be carried out without any suction effect as a result tight seal above the connection area 113 must be used.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Charging Or Discharging (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Details (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914982 | 1999-04-01 | ||
DE19914982 | 1999-04-01 | ||
DE19919378A DE19919378A1 (de) | 1999-04-01 | 1999-04-28 | Metallurgisches Gefäß mit einer Abstichvorrichtung und Verfahren zum kontrollierten, schlackenfreien Abziehen von flüssigem Metall aus diesem Gefäß |
DE19919378 | 1999-04-28 | ||
PCT/EP2000/002903 WO2000060297A1 (de) | 1999-04-01 | 2000-03-31 | Metallurgisches gefäss mit einer abstichvorrichtung und verfahren zum kontrollierten, schlackenfreien abziehen von flüssigem metall aus diesem gefäss |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1181491A1 true EP1181491A1 (de) | 2002-02-27 |
EP1181491B1 EP1181491B1 (de) | 2003-08-06 |
Family
ID=26052726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00925154A Expired - Lifetime EP1181491B1 (de) | 1999-04-01 | 2000-03-31 | Metallurgisches gefäss mit einer abstichvorrichtung und verfahren zum kontrollierten, schlackenfreien abziehen von flüssigem metall aus diesem gefäss |
Country Status (15)
Country | Link |
---|---|
US (1) | US6596221B1 (de) |
EP (1) | EP1181491B1 (de) |
JP (1) | JP2002541422A (de) |
CN (1) | CN1187566C (de) |
AT (1) | ATE246791T1 (de) |
AU (1) | AU763426B2 (de) |
BR (1) | BR0009479A (de) |
CA (1) | CA2367997C (de) |
CZ (1) | CZ297606B6 (de) |
EA (1) | EA003075B1 (de) |
ES (1) | ES2204571T3 (de) |
MX (1) | MXPA01009780A (de) |
PL (1) | PL193887B1 (de) |
TR (1) | TR200102772T2 (de) |
WO (1) | WO2000060297A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5537934A (en) * | 1994-10-19 | 1996-07-23 | Engelhard Corporation | Cationically stabilized slurries of calcined kaolin clay |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
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DE10060729A1 (de) * | 2000-12-07 | 2002-06-20 | Messer Griesheim Gmbh | Schmelzofen |
CA2454904A1 (en) * | 2001-07-23 | 2003-02-06 | Inductotherm Corp. | Induction melting furnace with metered discharge |
DE10355549A1 (de) * | 2003-11-27 | 2005-06-23 | Intracon Gmbh | Chargiergutvorwärmer |
RU2293937C2 (ru) * | 2005-02-09 | 2007-02-20 | Техком Импорт Экспорт Гмбх | Способ опорожнения металлоплавильной емкости от основной части жидкого металла через выпускное отверстие в донной поверхности емкости и металлоплавильная емкость |
DE102005033287A1 (de) * | 2005-07-16 | 2007-01-25 | Sms Demag Ag | Schmelzofen und Verfahren zu dessen Betrieb |
DE102008008033A1 (de) * | 2007-08-04 | 2009-02-05 | Sms Demag Ag | Einrichtung zum schlackenfreien Abstich oder zur Überführung einer Schmelze |
CN101598500B (zh) * | 2009-06-30 | 2011-04-06 | 莱芜钢铁集团有限公司 | 一种连续炼钢炉无渣出钢口 |
WO2011143715A1 (en) * | 2010-05-20 | 2011-11-24 | Garry Lee Stokes | Apparatus for cleaning a metal transfer pipe |
DE102010045951A1 (de) | 2010-09-21 | 2012-03-22 | Fuchs Technology Holding Ag | Vorrichtung und Verfahren zur kontinuierlichen Stahlerzeugung und metallurgischen Bearbeitung |
CN102735066B (zh) * | 2012-06-14 | 2013-12-18 | 芜湖楚江合金铜材有限公司 | 潜流式通道机构及使用所述机构进行溶液流通控制的方法 |
CN102944118B (zh) * | 2012-11-14 | 2014-12-10 | 云南建水锰矿有限责任公司 | 矿热炉开炉眼的方法 |
CN102974669B (zh) * | 2012-11-30 | 2014-12-24 | 宁波思明汽车科技有限公司 | 管材成型用易熔合金循环利用方法 |
KR101406503B1 (ko) * | 2012-12-21 | 2014-06-13 | 주식회사 포스코 | 고정형 전기로 및 용강 제조 방법 |
EP2803927A1 (de) | 2013-05-17 | 2014-11-19 | Siemens VAI Metals Technologies GmbH | Metallurgisches Ofengefäß und Verfahren zu seinem Betrieb |
DE102013219686A1 (de) | 2013-09-30 | 2015-04-02 | Siemens Vai Metals Technologies Gmbh | Gefäßunterteil, ein damit ausgebildetes metallurgisches Gefäß sowie Elektrolichtbogenofen und Verfahren zu dessen Betrieb |
DE102013219682A1 (de) * | 2013-09-30 | 2015-04-02 | Siemens Vai Metals Technologies Gmbh | Gefäßunterteil, ein damit ausgebildetes metallurgisches Gefäß sowie Elektrolichtbogenofen und Verfahren zu dessen Betrieb |
CN104571150B (zh) * | 2014-11-19 | 2017-03-29 | 田志恒 | 熔融陶瓷纤维流量控制系统 |
KR101713614B1 (ko) * | 2015-09-25 | 2017-03-08 | 주식회사 포스코건설 | 진공을 이용한 출강 장치 및 출강 제어 방법 |
EP3724586B1 (de) * | 2017-12-15 | 2021-09-01 | Danieli & C. Officine Meccaniche S.p.A. | Schmelzofen für metallurgische anlage und betriebsverfahren dafür |
AU2019212918A1 (en) * | 2018-01-23 | 2020-09-03 | Inductotherm Corp. | Sealed tilt pour electric induction furnaces for reactive alloys and metals |
EP4311994A1 (de) | 2022-07-26 | 2024-01-31 | Primetals Technologies Austria GmbH | Metallurgisches gefäss mit einer abstichvorrichtung zum kontrollierten abstechen von flüssigem metall |
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DE113574C (de) * | ||||
DE1180092B (de) | 1959-09-08 | 1964-10-22 | Basic Products Corp | Vorrichtung zum Entleeren von Schmelzoefen |
SE316495B (de) * | 1969-03-12 | 1969-10-27 | Inva Ab | |
JPS5594430A (en) | 1979-01-11 | 1980-07-17 | Kawasaki Steel Corp | Separating and tapping device of molten metal and molten slag |
JPS598756B2 (ja) | 1979-12-27 | 1984-02-27 | 川崎製鉄株式会社 | 溶滓カツト出鋼方法 |
JPS60108146A (ja) * | 1983-11-18 | 1985-06-13 | Nec Corp | 非晶質材料製造装置 |
DE8504755U1 (de) * | 1985-02-20 | 1986-08-28 | Kortec AG, Zug | Feuerfestausgekleidetes Abflußrohr zum Überleiten einer vorgegebenen Menge flüssigen Metalls aus einem ein Metallschmelzbad enthaltenden Gefäß in einen Aufnahmebehälter |
DE4033304A1 (de) * | 1990-10-19 | 1992-04-23 | Glashuettentechnik Grob Gmbh | Glasschmelzofen |
US5305990A (en) * | 1993-02-10 | 1994-04-26 | Sherwood William L | Metallurgical furnace vacuum slag removal |
DE4439214A1 (de) * | 1994-11-03 | 1996-05-09 | Schmitz & Apelt Loi Industrieo | Magnesiumschmelzofen und Verfahren zum Schmelzen von Magnesium |
EP0960862B1 (de) * | 1998-05-21 | 2003-06-25 | TECHINT COMPAGNIA TECNICA INTERNAZIONALE S.p.A. | Niveauregelvorrichtung für ein flüssiges Material in einem Schmelzofen oder ähnlichem, insbesondere in Öfen zur Herstellung von Steinwolle |
-
2000
- 2000-03-31 BR BR0009479-0A patent/BR0009479A/pt not_active IP Right Cessation
- 2000-03-31 WO PCT/EP2000/002903 patent/WO2000060297A1/de active IP Right Grant
- 2000-03-31 EA EA200101018A patent/EA003075B1/ru not_active IP Right Cessation
- 2000-03-31 MX MXPA01009780A patent/MXPA01009780A/es active IP Right Grant
- 2000-03-31 ES ES00925154T patent/ES2204571T3/es not_active Expired - Lifetime
- 2000-03-31 CN CNB008057435A patent/CN1187566C/zh not_active Expired - Lifetime
- 2000-03-31 TR TR2001/02772T patent/TR200102772T2/xx unknown
- 2000-03-31 AU AU43973/00A patent/AU763426B2/en not_active Ceased
- 2000-03-31 CZ CZ20013496A patent/CZ297606B6/cs not_active IP Right Cessation
- 2000-03-31 US US09/937,734 patent/US6596221B1/en not_active Expired - Lifetime
- 2000-03-31 EP EP00925154A patent/EP1181491B1/de not_active Expired - Lifetime
- 2000-03-31 PL PL00350411A patent/PL193887B1/pl unknown
- 2000-03-31 CA CA002367997A patent/CA2367997C/en not_active Expired - Fee Related
- 2000-03-31 AT AT00925154T patent/ATE246791T1/de not_active IP Right Cessation
- 2000-03-31 JP JP2000609752A patent/JP2002541422A/ja active Pending
Non-Patent Citations (1)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5537934A (en) * | 1994-10-19 | 1996-07-23 | Engelhard Corporation | Cationically stabilized slurries of calcined kaolin clay |
Also Published As
Publication number | Publication date |
---|---|
EA200101018A1 (ru) | 2002-04-25 |
PL193887B1 (pl) | 2007-03-30 |
EP1181491B1 (de) | 2003-08-06 |
CZ20013496A3 (cs) | 2002-10-16 |
CZ297606B6 (cs) | 2007-02-07 |
CA2367997A1 (en) | 2000-10-12 |
TR200102772T2 (tr) | 2002-04-22 |
CA2367997C (en) | 2007-01-09 |
BR0009479A (pt) | 2002-02-19 |
MXPA01009780A (es) | 2002-05-14 |
AU763426B2 (en) | 2003-07-24 |
ATE246791T1 (de) | 2003-08-15 |
AU4397300A (en) | 2000-10-23 |
WO2000060297A1 (de) | 2000-10-12 |
US6596221B1 (en) | 2003-07-22 |
JP2002541422A (ja) | 2002-12-03 |
CN1187566C (zh) | 2005-02-02 |
CN1345409A (zh) | 2002-04-17 |
ES2204571T3 (es) | 2004-05-01 |
EA003075B1 (ru) | 2002-12-26 |
PL350411A1 (en) | 2002-12-02 |
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