Classifications

• • C—CHEMISTRY; METALLURGY
  • C21—METALLURGY OF IRON
  • C21B—MANUFACTURE OF IRON OR STEEL
  • C21B7/00—Blast furnaces
  • C21B7/14—Discharging devices, e.g. for slag
• • 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
  • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
  • F27B1/00—Shaft or like vertical or substantially vertical furnaces
  • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
  • F27B1/21—Arrangements of devices for discharging
• • 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
  • F27D3/1509—Tapping equipment
  • F27D3/1536—Devices for plugging tap holes, e.g. plugs stoppers

Definitions

• the application relates to a pneumatic slag stopper for pneumatically closing a taphole channel of a metallurgical vessel with respect to the discharge of slag by means of at least one of at least one
• Gas outlet opening in the taphole channel introduced gas stream, and a method for pneumatic
• liquid slags which have a lower density than the liquid ones, are formed in addition to liquid metal products
• pneumatic slag stopper and a method for pneumatically closing a taphole channel
• pneumatic slag stopper for pneumatic closing of a
• the gas outlet opening is attached to a pivot arm, which is pivotable about a pivot axis by means of a pivot drive, and the pivot arm has a gas supply channel opening into the at least one gas outlet opening, which is characterized
• Taphole - - or the tap hole at the end - of a metallurgical vessel with respect to the discharge of slag - the tap hole at the end of the tap hole is thus open when the gas stream, the discharge of slag or a slag entraining stream of
• the gas flows from at least one gas outlet opening against the
• the taphole channel is suitable for stopping slag or a slag of entraining stream of molten metal due to the gas flowing out of the gas outlet opening.
• a gas supply device comprising the gas supply channel and the at least one gas outlet opening is suitable, through a taphole channel - or a
• the taphole channel Through the taphole channel, the molten metal is discharged from the metallurgical vessel.
• the taphole channel terminates at the outside of the metallurgical vessel with the taphole.
• the taphole is in the so-called Abstichlochbrille, a perpendicular to the longitudinal axis of the taphole channel plate.
• the metallurgical vessel is for example a
• Steel mill converter for example for a BOF or an LD process.
• the gas outlet opening is attached to a pivot arm, since it is only then to be positioned in front of the tap hole, if slag leakage threatens. Until then, she should be in a different position. When the time comes, she should be able to be positioned quickly in front of the tap hole. This is achieved by using a swivel arm
• the gas outlet opening is attached to a pivot arm, which is pivotable about a pivot axis by means of a pivot drive,
• Has gas outlet opening gas supply channel characterized in that
• the longitudinal axis of the at least one gas outlet opening is substantially parallel to the pivot axis
• the swivel arm is by means of the pivot drive to the
• Swivel axis pivotable in a sealing position.
• He is pivotable with a pivoting movement in a largely perpendicular to the pivot axis plane in the sealing position.
• the pivot arm has a in the at least one
• Gas outlet opening gas supply channel opening Through this gas supply channel is the pneumatic closing necessary gas supplied to the gas outlet.
• the guide in the swivel arm makes it compact and easy to build.
• the longitudinal axis of the gas outlet opening is largely parallel to the pivot axis. Being largely parallel includes both parallel and deviation from
• Deviation of +/- 5 ° refers to an angle between the longitudinal axis of the gas outlet opening and the pivot axis in a plane containing both axes as it descends
• the distance of the gas outlet opening of the pivot axis is adjustable. This can be realized, for example, in that a component of a certain length serving as a swivel arm and connected to the swivel drive moves into different positions with respect to the axis of rotation
• Slag stopper can be adjusted with housing on the metallurgical vessel, which is much more complex.
• Slag stopper thus offers comparatively reduced assembly times and costs.
• the swivel arm is pivotable from a home position to a maximum swivel angle.
• the maximum swing angle is adjustable. That can
• an adjustable stop element to limit the
• Cinder stopper makes less effort.
• the swivel arm preferably comprises at least one arm module and at least one gas outlet module,
• Such a modular construction of the swivel arm is easier to produce and causes less effort during maintenance, as for example, possibly only the
• a plurality of gas outlet openings are present. This may have advantages in terms of the flow behavior of the gas stream after leaving the slag stopper.
• gas outlet openings may have comparatively smaller cross-sections with the same overall cross-sectional area as a single, larger gas outlet opening.
• Gas outlet openings be very short. This can lead to the gas flow at the outlet - for example, due to strong one-sided pressure loss in a change in the Flow direction when passing from the gas supply channel into the gas outlet opening - with respect to a longitudinal axis of the
• Gas outlet is deflected, and therefore coaxial
• Gas duct or as gas channels in a nozzle head element which in the swivel arm or in the
• Gas outlet module can be used. This makes it possible, if appropriate, to use different geometries of the gas outlet openings in a simple manner or to react to changed boundary conditions of the problem to be solved, or to carry out wear-related replacement.
• the position of the nozzle head element is adjustable by means of adjusting elements. For example, with regard to the angle of the longitudinal axes of the gas outlet openings with respect to the pivot axis.
• Adjustment can be, for example, screws. Due to the adjustability can - as above
• Sealing a taphole channel of a metallurgical vessel with respect to the discharge of slag is also known as sealing position.
• the pivot axis passes through a pivot shaft.
• the slag stopper is provided with a gas source line for supplying the gas supply channel with gas.
• the gas source conduit is valveless connected to the gas supply channel at least via a connecting channel arranged eccentrically in the pivot shaft only in the sealing position.
• connection channels may be present outside the pivot shaft to introduce the gas from the connecting channel in the pivot shaft in the gas supply channel.
• a valveless design reduces susceptibility to failure and maintenance.
• the end opening of the gas source line and the gas source line side opening of the arranged in the pivot shaft connecting channel overlap only in
• Swivel shaft closes the gas source line.
• a plurality of gas outlets in the vicinity of the at least one gas outlet opening in the pivot arm, preferably in the gas outlet module, a plurality of gas outlets
• the gas outlets are arranged away from the region in which the gas outlet opening or the gas outlet openings are arranged. Under the environment is the area of the swivel arm or the
• gas outlets emit gas, which is supplied, for example, through the gas supply channel when the gas outlets open into the gas supply channel.
• Part-turn actuator gearless This reduces manufacturing costs, susceptibility to failure and maintenance under the extreme environmental conditions that a slag stopper attached to a metallurgical vessel has to endure.
• the pivot drive comprises at least one crankshaft and at least one pneumatic cylinder for driving the crankshaft. This reduces the susceptibility to failure and maintenance under the extreme environmental conditions that a slag stopper attached to a metallurgical vessel has to endure.
• Pneumatic cylinder is thereby increased.
• a further subject of the present application is a metallurgical vessel having a taphole channel and a slag stopper according to the invention attached to the metallurgical vessel, wherein the longitudinal axis of the taphole channel is substantially parallel to the pivot axis.
• the slag stopper may be attached directly or indirectly to the metallurgical vessel. Preferably, it is releasably secured.
• the attachment to the metallurgical vessel can
• consoles used for AT408965B slagstoppers can also be used for the slag stopper according to the invention. This allows easy conversion of
• Supply lines can be used unchanged by appropriate construction of the slag stopper.
• the slag stopper according to the invention may, of course, analogously to the teaching of AT408965B have a frame which carries the parts of the slag stopper, which in turn the parts of the slag stopper supporting frame is releasably secured to the metallurgical vessel.
• Another object of the present application is a method for pneumatically closing a
• Abstichlochkanals a metallurgical vessel with respect to the discharge of slag by means of a gas stream provided from at least one gas outlet opening, wherein the at least one mounted on a pivot arm
• Gas outlet opening is positioned in a sealing position before the tap hole of the taphole channel, characterized
• Pivoting movement is pivoted in the sealing position in front of the taphole, wherein the pivoting movement takes place in a plane substantially perpendicular to the longitudinal axis of the taphole channel.
• the pivot arm is pivoted in front of the tap hole, that the distance between the
• the pivoting movement takes place in a plane in which the longitudinal axis of the taphole channel is located.
• Gas outlet opening approaches the taphole in the direction of the longitudinal axis of the taphole seen practically from the front.
• the invention pivots so that the pivoting movement in a longitudinal axis of the
• Tapping hole channel largely perpendicular plane takes place.
• the gas outlet opening approaches the taphole or the longitudinal axis of the taphole channel
• the gas outlet is in front of the tap hole in Abstichlochbrille - ie outside the metallurgical
• Vessel - positioned for example at a distance of 30 - 100 mm.
• the gas outlet opening is oriented in the direction of taphole.
• Closing a taphole channel is a central, with respect to the edges of the taphole symmetrical introduction of such gas flow important.
• only one gas outlet opening is present, it is preferably positioned centrally in front of the taphole - longitudinal axis of the taphole channel and the longitudinal axis of the
• Gas outlet are substantially coaxial.
• Gas outlet opening is then will also be substantially coaxial with the longitudinal axis of the taphole channel.
• multiple gas exit openings are present, they are preferably positioned centrally in front of the taphole such that the gas flow is substantially coaxial with the longitudinal axis of the taphole channel.
• Parts of the system can freeze the splashes, it speaks of extenuations. Extensions also occur at the slag stopper and in the vicinity of the tap hole, for example at the
• Tapping process grow.
• Hinder gas outlet reduced. This is because, for example, in a previous
• Tapping partially trained trumpets are pushed away and knocked off in the lateral approach of the swing arm.
• the maintenance effort is thereby reduces and obstructive problems in pneumatic closing reduced.
• Another object of the present application is a signal processing device with a machine-readable program code, characterized in that it has control commands for performing a method according to the invention.
• Another object of the present application is a machine-readable program code for a
• Another object of the present application is a storage medium with a stored thereon
• Machine-readable program code according to the invention.
• FIGs 1 and 2 show conventional pneumatic
• Figures 3 and 4 show an embodiment of a pneumatic slag stopper according to the invention in
• FIG. 5 shows a section through an embodiment of a swivel arm according to the invention.
• FIG. 6 shows an embodiment of a device according to the invention in a view largely analogous to FIGS. 3 and 4
• FIG. 7 schematically shows a swivel arm with arm module and gas outlet module.
• FIG. 8 shows a gas outlet module with nozzle head element and gas outlet openings.
• FIGS 9a and 9b show schematically an embodiment of valveless gas supply of the gas supply channel.
• Figures 1 and 2 show pneumatic closing of the
• Tap hole 4 is located in the taphole glasses. 5
• the pivot arm 7 is pivotable about a pivot axis 9 by means of a pivot drive 10.
• Paper plane is perpendicular to the pivot axis 9.
• a sealing position is shown by means of
• Quarter turn actuator 10 was taken.
• the longitudinal axis 11 of the gas outlet opening 8 in the plane of the paper is coaxial with the longitudinal axis of the taphole channel 3.
• the gas outlet opening 8 is located in the taphole 4 in the taphole glasses. 5
• FIG. 3 shows a pneumatic according to the invention
• the pivot arm 13 has at its end a gas outlet opening. Not shown is a running in the pivot arm 13 gas supply channel. The indicated longitudinal axis 14 of the gas outlet opening is parallel to
• Swivel axis 15 The swivel drive is within the
• the housing 16 arranged and not shown separately.
• the housing 16 may be thermally insulated.
• FIG. 4 shows another view of that in FIG. 3
• a taphole glasses 17 is shown with taphole of a metallurgical vessel to which the slag stopper according to the invention is mounted.
• the longitudinal axis 18 of the taphole channel behind the taphole is substantially parallel to the pivot axis 15th
• Figure 5 shows schematically in a sectional view the ratio of the longitudinal axis 20 of a gas outlet opening 19 in a pivot arm 21 to the pivot axis 22.
• a gas supply channel 23 which in the
• Figure 7 shows schematically in sectional view a portion of a pivot arm 25, the arm module 26 and a Gas outlet module 27 includes, which is releasably secured to the arm module 26.
• Figure 8 shows schematically in sectional view a in the
• Gas outlet module 28 inserted nozzle head element 29 with a plurality of gas channels 30a, 30b, 30c as gas outlet openings. Further gas outlet openings in the nozzle head element 29 are indicated, but not provided with reference numerals. In the environment of the gas outlet openings are optionally available
• FIG. 9a shows schematically how in the sealing position a gas source conduit 32 is valvelessly connected to the gas supply channel 36 in the pivoting arm 37 via a connecting channel 34 arranged eccentrically to the pivot axis 33 in the pivot shaft 35.
• FIG. 9b shows diagrammatically how, in a position given by about 135 ° in comparison to FIG. 9a
• Connecting channel 34 no longer communicates with the gas source line 32.

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• 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)
• Carbon Steel Or Casting Steel Manufacturing (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=61868205

Family Applications (1)

Country Status (5)

Citations (3)

Family Cites Families (11)

• 2018
  • 2018-03-29 EP EP18164879.1A patent/EP3546599A1/de not_active Withdrawn
• 2019
  • 2019-03-27 EP EP19712236.9A patent/EP3775294A1/de active Pending
  • 2019-03-27 JP JP2020552323A patent/JP7071530B2/ja active Active
  • 2019-03-27 WO PCT/EP2019/057741 patent/WO2019185728A1/de active Application Filing
  • 2019-03-27 KR KR1020207027575A patent/KR20200138233A/ko active IP Right Grant
  • 2019-03-27 CN CN201980023897.0A patent/CN111902548A/zh active Pending

Patent Citations (3)

Non-Patent Citations (1)

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