CN1244911A - Device for discharging or mixing lump materials - Google Patents
Device for discharging or mixing lump materials Download PDFInfo
- Publication number
- CN1244911A CN1244911A CN97181350A CN97181350A CN1244911A CN 1244911 A CN1244911 A CN 1244911A CN 97181350 A CN97181350 A CN 97181350A CN 97181350 A CN97181350 A CN 97181350A CN 1244911 A CN1244911 A CN 1244911A
- Authority
- CN
- China
- Prior art keywords
- conveying worm
- conveying
- axle
- shaft furnace
- helicoid
- 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.)
- Pending
Links
- 238000007599 discharging Methods 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 230000009467 reduction Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 5
- 239000000376 reactant Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 239000013590 bulk material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/46—Devices for emptying otherwise than from the top using screw conveyors
-
- 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 specially adapted for furnaces of these types
- F27B1/21—Arrangements of devices for discharging
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
-
- 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 specially adapted for furnaces of these types
- F27B1/20—Arrangements of devices for charging
-
- 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
- F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Furnace Charging Or Discharging (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Screw Conveyors (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Manufacture Of Iron (AREA)
- Glanulating (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
A device for discharging or mixing lump materials from a shaft furnace with a hollow body for discharging the reaction materials open at the bottom and/or at least to one side, has screws arranged in a star-shape in the hollow body. These screws have shafts of different lengths in a plane and/or one screw is a continuous screw. In one of the possible combinations of floating shafts (2) of three different lengths, the shafts are arranged in the shaft furnace (1) so as to form an eight-pointed star, the opposite floating shafts (2) having the same length. The 'dead' or non-stirred area at the centre of the shaft furnace is extremely reduced in this combination.
Description
The iron ore that the present invention relates to lump material, particularly partial reduction or reduction fully is at a shaft furnace with from a shaft furnace preferably discharging or the agitating device of a direct reduction shaft furnace, this shaft furnace has one downwards and/or to the discharging hollow body of the uncovered reaction mass of at least one side, wherein, conveying worm is star arrangement in this hollow body.
EP-B 166 679 has described the conveying worm that solid particle moves and discharging is used in the shaft furnace.This conveying worm relates to conveying worm radial arrangement, unsettled supporting with equal length and a cylindrical cross-section.Tapered member between conveying worm makes the dead angle be reduced to minimum level.But the shortcoming of this structure is: although because this tapered member has reduced dead angle area, dischargeable capacity remains unchanged.
EP-B 85 290 has described a kind of conveying worm of short taper profile, and this conveying worm is bearing in one and plays the cone-shaped component of windrow circular cone effect when being arranged in the center, and is bearing on the circumference.As the patent EP-B 166 679 that quotes, these conveying worms identical angle that staggers is radially arranged with diagonal is corresponding.
CH-A 376 134 has described the method for reduction of iron ore Cheng Tie, and wherein, bulk material is carried by the conveying worm that radially is provided with up and down.These conveying worms have identical pitch and spiral height, and are contained on the cylindrical shaft of two supports.
GB-A 15 02 090 has described the conveying worm that is arranged in parallel that the iron ore discharging is used.Its spiral-shaped taper shape that is reduces.Axle interconnects and Synchronous Transmission by V belt.
When iron ore reduces with active gases, for economic reasons, have only certain superstoichiometric gas flow to contact, but this had both caused uniform distribution of gas with ore, caused the even descending motion of solid layer in the shaft furnace again.
For example using the lux (COREX of section
) in the shaft furnace of technology, the motion of solid and discharging are all undertaken by the conveying worm in the star arrangement of shaft lower end.In order to reach descending as far as possible uniformly of bulk material, the zone that is positioned at furnace bottom should have maximum effective discharging area, and must guarantee the continuous motion or the stirring of conversion zone.Whole invalid area constitutes the zone of not moving with very steep interior stockpile angle.This zone that is called " dead angle " has very big shortcoming: make reaction compartment volume partly become invalid.Thereby because time of staying of the length of ore or the ore that reduced and cause caking and agglomerate in the zone in this section, this has a negative impact to material fluidity, thereby reduces material cycling and productivity ratio.
According to prior art, this arrangement with conveying worm equal length unsettled supporting makes the center of stove almost keep not moving.Because using under the dusty gas situation, because the nozzle of arranging on circumference makes air-flow concentrate on that the shaft middle part is mobile to cause uneven distribution of gas.
The present invention is intended to avoid not moving of these zones also a zone that reduces to move to be reduced to minimum level, and wherein the dischargeable capacity of Yun Dong furnace charge should reach maximum.So-called dischargeable capacity is meant that zone of the gas/solid reaction of carrying out requirement in the shaft furnace continuously.
The invention is characterized in that conveying worm has the axle of different length, wherein, preferably the axle of radial symmetric is designed to identical length, and/or the conveying worm conveying worm that is designed to connect.
The layout of the conveying worm by different length also can make the regional movement near the center of discharge zone.By this layout, particularly can make the top of shaft promptly carry out reaching the continuous completely stirring and the decline of material to a great extent in the scope of reative cell of course of reaction.
Can in the reaction zone of direct reduction shaft furnace, realize on the one hand stirring uniformly first with the present invention, realize the continuous discharge of solid on the other hand.It is the condition of the optimal fluid dynamics of solid and gas that the present invention makes the layout of conveying worm and the suitable reactant of design.
Can make " dead angle " district reduce to minimum degree by the conveying worm that for example use to connect and short conveying worm combination, particularly because the accumulation of not moving of the solid that under the situation of the quite near distance of effective helix angle conveyer, almost do not existed.By for example layout of four long and conveying worms four weak points, the effective coverage can be expanded to the edge district of circumference.By layout each adjacent length and short conveying worm, the discharging of product is undertaken by each material blanking tube.The geometry that also can adapt to the gasifier of welding by the layout of this measure material blanking tube better.When short and long conveying worm makes up, both can adapt to the characteristic of motion like this, can adapt to the discharging characteristic of solid again by the design of conveying worm like this, promptly both can influence discharging efficient, can influence agitation characteristics again.Especially can influence the discharging characteristic of solid charge.
By a feature of the present invention, conveying worm is arranged in two or more planes, thereby the furnace charge of bottom in the stove is moved better.
By another feature of the present invention, corresponding major axis is designed to self-centering and/or buckles into the formula structure.In the time of in conveying worm is packed ready-made stockpile into, must guarantee that two-semiaxle is aimed at and to the center.
By a feature of the present invention, the helicoid of conveying worm begins at the free end of axle, thereby the best that had both guaranteed nucleus stirs, and has guaranteed the constant discharging of product again.
By another feature of the present invention, the axle of conveying worm is designed to constantly reduce to the center.Can make conversion zone reach maximum by this measure by the effective cross section of the scope of conveying worm motion.
By another feature of the present invention, the helicoid of conveying worm has a constant pitch.Under the situation of this structure, on the entire cross section of conveying worm, reach uniform conveying characteristic.
By another feature of the present invention, the helicoid of conveying worm has the different pitch by the technology decision.The nonlinear pitch of the helicoid by conveying worm can be considered the flowability of the response characteristic and the reactant of welding gasifier.Because the moulding of the Mathematical Modelingization of conveying characteristic curve and can consider the reactant in the stove and the response characteristic of reacting gas.
By another characteristic of the present invention, the transmission of axle is undertaken by the motor that connects.When carrying out the transmission of axle with motor, provide the flexibly adaptation of conveying worm, and conveying worm can be realized motion with the transmission of itself when installation and removal to process.
By a feature of the present invention, minor axis has identical revolution with major axis, if require the minimum investment of equipment, then motor is not preferably regulated operation.Thereby can reach the approaching identical revolution of axle, regulate cost but saved.
By another feature of the present invention, regulate the revolution of single axle according to the conveying characteristic curve of process.Adjusting operation by axle can consider the welding gasifier conversion zone power and by the needs of process decision.
By another feature of the present invention, but axle is arranged to axially-movable.Like this when checking or under failure condition, can make things convenient for packing into and dismantling of axle.Under the irregular situation of conversion zone, can produce decisive influence to flowability by the insertion depth that changes axle.
By a kind of structure of the present invention, the blade that constitutes helicoid has the model of a matching process conveying characteristic curve.Can consider the formation of the caking characteristics and the conversion zone of solid material by this model of blade.
By last feature of the present invention, the spirochetal helicoid of conveying worm has a shape by the conveying characteristic curve decision of process.Can make by this coupling between the geometrical condition of the reactive of charging and reduction shaft and reach optimization.
Describe the present invention in detail below in conjunction with some embodiment.Wherein:
Fig. 1 represents the conveying worm of eight different lengths in the shaft furnace;
Fig. 2 represents the conveying worm of six different lengths in the shaft furnace;
Fig. 3 represents the combination of the conveying worm of two different lengths;
Fig. 4 represents two layouts that connect axle in the shaft furnace;
Fig. 5 represents two plane of arrangement figure that connect axle in the shaft furnace;
Fig. 6 represents a combination that connects axle and six unsettled conveying worms;
Fig. 7 represents a combination that connects axle and four unsettled conveying worms;
Fig. 8 represents the automatic centering heart of a through conveying worm and buckles into structure;
Fig. 9 represents the cross section of this connection;
Figure 10 represents the pattern of the automatic centering heart of a through conveying worm;
Figure 11 represents the cross section of this connection.
Fig. 1 represents an examples of combinations of the unsettled conveying worm 2 of three kinds of different lengths, and these conveying worms are anistree star and are arranged in the shaft furnace 1.Make the motionless area decreases at the center of " dead angle " district that is shaft furnace arrive minimum level by this combination.
Fig. 2 represents an examples of combinations of the unsettled conveying worm 2 of two kinds of different lengths, and these conveying worms are hexagram and are arranged in the shaft furnace 1.When this combination, stir to such an extent that do not resemble Fig. 1 well near the marginal zone of stove, perhaps the material that will unload not exclusively resembles even drawing off Fig. 1.
Fig. 3 represents to be the examples of combinations of two kinds of different lengths of the unsettled conveying worm 2 of anistree star arrangement.In this combination, better than the motion of marginal zone embodiment illustrated in fig. 2 near the marginal zone of shaft furnace 1.
Fig. 4 is illustrated in the space of two through conveying worm 3 combinations in the shaft furnace 1 and arranges.
The plane that Fig. 5 presentation graphs 4 is arranged, wherein in first plane of through conveying worm 3, the unsettled conveying worm 2 that the length of four weak points is identical has guaranteed the optimal movement of the material in this plane.
Fig. 6 is illustrated in combination that connects 3 and six unsettled conveying worms 2 of axle in the shaft furnace 1.
Fig. 7 is illustrated in six unsettled conveying worms 3 and the perforation axle in the plane.
Fig. 8 represents the cooperation of the two-semiaxle of a perforation conveying worm 3, and for alignment and engagement, this matching design becomes tooth-shape structure.The advantage of one semiaxis is just also to mesh with a semiaxis alignment that will pierce on opposite when it creeps into the material of the shaft furnace that does not have emptying.
Fig. 9 represents the section that the automatic alignment of this profile of tooth junction of a through conveying worm two-semiaxle is cut open.
Figure 10 represents the cross section that through conveying worm 3 two-semiaxles want the longtitudinal view of the junction of alignment to cut.
Figure 11 represents the section that the alignment cooperation place of the two-semiaxle of a through conveying worm 3 is cut open.The accurate cooperation and the characteristic curve of the conveying worm of two-semiaxle under the situation of the adjusting revolution of the drive motor of two-semiaxle, have been guaranteed.
Claims (13)
1. the iron ore of lump material, particularly partial reduction or reduction fully is from a shaft furnace, discharging or the agitating device from a direct reduction shaft furnace preferably, this shaft furnace has one and/or the discharging hollow body of using to the uncovered reaction mass of a side at least downwards, conveying worm is star arrangement in this hollow body, it is characterized in that, these conveying worms have the axle of different length in a plane, wherein preferably corresponding axle is designed to identical length, and/or a conveying worm is designed to through conveying worm.
2. by the device of claim 1, it is characterized in that these conveying worms are arranged in two and a plurality of planes.
3. by each device in the claim 1 to 2, it is characterized in that corresponding major axis is designed to automatic alignment and/or buckles into the structure of formula.
4. by each device in the claim 1 to 3, it is characterized in that the helicoid of conveying worm starts from the free end of axle.
5. by each device in the claim 1 or 4, it is characterized in that the axle of conveying worm is designed to constantly reduce to the center.
6. by each device in the claim 1 to 5, it is characterized in that the helicoid of conveying worm has constant pitch.
7. by each device in the claim 1 to 6, it is characterized in that the helicoid of conveying worm has the different pitch by the technology decision.
8. by each device in the claim 1 to 7, it is characterized in that the transmission of axle is undertaken by the motor that connects.
9. by each device in the claim 1 to 8, it is characterized in that minor axis has identical revolution with major axis.
10. by each device in the claim 1 to 9, it is characterized in that, regulate the revolution of single axle according to the conveying characteristic curve of process.
11., it is characterized in that axle is arranged to carry out axially-movable by each device in the claim 1 to 10.
12., it is characterized in that the spirochetal helicoid of conveying worm has a shape by the conveying characteristic curve decision of process by each device in the claim 1 to 11.
13., it is characterized in that the blade that constitutes helicoid has the shape that a characteristic with convey materials adapts by each device in the claim 1 to 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0197796A AT406299B (en) | 1996-11-12 | 1996-11-12 | DEVICE FOR DISCHARGING OR MIXING PIECE OF GOODS |
| ATA1977/96 | 1996-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1244911A true CN1244911A (en) | 2000-02-16 |
Family
ID=3525161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97181350A Pending CN1244911A (en) | 1996-11-12 | 1997-11-07 | Device for discharging or mixing lump materials |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0946849A1 (en) |
| JP (1) | JP2001503477A (en) |
| KR (1) | KR20000053194A (en) |
| CN (1) | CN1244911A (en) |
| AT (1) | AT406299B (en) |
| AU (1) | AU715697B2 (en) |
| BR (1) | BR9713015A (en) |
| CA (1) | CA2271435A1 (en) |
| DE (1) | DE19750773C2 (en) |
| ID (1) | ID21347A (en) |
| SK (1) | SK58499A3 (en) |
| TR (1) | TR199901020T2 (en) |
| TW (1) | TW428029B (en) |
| WO (1) | WO1998021537A1 (en) |
| ZA (1) | ZA9710200B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910387A (en) * | 2012-11-12 | 2013-02-06 | 北京东方东楼电力科技有限公司 | Raw coal bunker loosening and dredging device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT405332B (en) * | 1997-07-14 | 1999-07-26 | Voest Alpine Ind Anlagen | SHAFT OVEN |
| AT505490B1 (en) | 2007-06-28 | 2009-12-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR PRODUCING IRON SPONGE |
| FI20080401L (en) * | 2008-06-11 | 2009-12-12 | Andritz Oy | A device for storing rolling material in a pile and unloading it from a pile |
| CN107512597B (en) * | 2017-09-19 | 2019-04-05 | 中国计量大学 | Screw multiple groups part material baiting method based on variable Rate study |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB188455A (en) * | 1921-09-16 | 1922-11-16 | Woodall Duckham & Jones 1920 L | Improvements in retort discharging devices |
| DE457226C (en) * | 1925-06-16 | 1928-03-10 | Carl Paul Debuch Dipl Ing | Discharge device for shaft ovens with rotating plates arranged below the fuel column |
| US2889219A (en) * | 1956-12-28 | 1959-06-02 | Inland Steel Co | Control method and apparatus for iron ore reduction process |
| US3704011A (en) * | 1971-08-12 | 1972-11-28 | Mintech Corp | Discharge mechanism for shaft kiln |
| IT1029175B (en) * | 1975-04-28 | 1979-03-10 | Kinglor Metor Spa | RETORT IRON SPONGE EXTRACTOR |
| EP0019389B1 (en) * | 1979-05-09 | 1984-03-21 | Foster Wheeler Power Products Limited | Vertical pyrolysing furnace, more particularly for tyre pieces |
| DE3034539C2 (en) * | 1980-09-12 | 1982-07-22 | Korf-Stahl Ag, 7570 Baden-Baden | Method and device for the direct production of liquid pig iron from lumpy iron ore |
| AT372109B (en) * | 1982-01-11 | 1983-09-12 | Voest Alpine Ag | DEVICE FOR DISCHARGING HOT GOODS, ESPECIALLY IRON SPONGE FROM A CHAMBER |
| US4502820A (en) * | 1982-08-16 | 1985-03-05 | Denka Engineering Kabushiki Kaisha | High-pressure conveyor for powdery and granular materials |
| DE3422185A1 (en) * | 1984-06-12 | 1985-12-12 | Korf Engineering GmbH, 4000 Düsseldorf | ARRANGEMENT FROM A CARBURETTOR AND DIRECT REDUCTION STOVE |
-
1996
- 1996-11-12 AT AT0197796A patent/AT406299B/en not_active IP Right Cessation
-
1997
- 1997-11-07 SK SK584-99A patent/SK58499A3/en unknown
- 1997-11-07 CA CA002271435A patent/CA2271435A1/en not_active Abandoned
- 1997-11-07 CN CN97181350A patent/CN1244911A/en active Pending
- 1997-11-07 AU AU48559/97A patent/AU715697B2/en not_active Ceased
- 1997-11-07 BR BR9713015-0A patent/BR9713015A/en not_active Application Discontinuation
- 1997-11-07 JP JP52194098A patent/JP2001503477A/en active Pending
- 1997-11-07 KR KR1019990704160A patent/KR20000053194A/en not_active Application Discontinuation
- 1997-11-07 WO PCT/AT1997/000243 patent/WO1998021537A1/en not_active Application Discontinuation
- 1997-11-07 EP EP97911047A patent/EP0946849A1/en not_active Ceased
- 1997-11-07 TR TR1999/01020T patent/TR199901020T2/en unknown
- 1997-11-07 ID IDW990311A patent/ID21347A/en unknown
- 1997-11-10 DE DE19750773A patent/DE19750773C2/en not_active Expired - Fee Related
- 1997-11-12 ZA ZA9710200A patent/ZA9710200B/en unknown
-
1998
- 1998-03-23 TW TW087104283A patent/TW428029B/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910387A (en) * | 2012-11-12 | 2013-02-06 | 北京东方东楼电力科技有限公司 | Raw coal bunker loosening and dredging device |
Also Published As
| Publication number | Publication date |
|---|---|
| TW428029B (en) | 2001-04-01 |
| AT406299B (en) | 2000-03-27 |
| ID21347A (en) | 1999-05-27 |
| DE19750773C2 (en) | 1999-03-25 |
| ATA197796A (en) | 1999-08-15 |
| AU715697B2 (en) | 2000-02-10 |
| CA2271435A1 (en) | 1998-05-22 |
| ZA9710200B (en) | 1998-06-12 |
| WO1998021537A1 (en) | 1998-05-22 |
| JP2001503477A (en) | 2001-03-13 |
| BR9713015A (en) | 2000-01-25 |
| SK58499A3 (en) | 2000-03-13 |
| KR20000053194A (en) | 2000-08-25 |
| DE19750773A1 (en) | 1998-05-14 |
| TR199901020T2 (en) | 2000-07-21 |
| AU4855997A (en) | 1998-06-03 |
| EP0946849A1 (en) | 1999-10-06 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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