EP0651058B1 - Procédé d'introduction d'un deuxième flux de matériaux pulvérulents dans une conduite de transport pneumatique véhiculant un premier débit réglable de matériaux pulvérulents - Google Patents
Procédé d'introduction d'un deuxième flux de matériaux pulvérulents dans une conduite de transport pneumatique véhiculant un premier débit réglable de matériaux pulvérulents Download PDFInfo
- Publication number
- EP0651058B1 EP0651058B1 EP94114430A EP94114430A EP0651058B1 EP 0651058 B1 EP0651058 B1 EP 0651058B1 EP 94114430 A EP94114430 A EP 94114430A EP 94114430 A EP94114430 A EP 94114430A EP 0651058 B1 EP0651058 B1 EP 0651058B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- stream
- pressure
- injection
- pulverulent materials
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 14
- 239000012254 powdered material Substances 0.000 title 2
- 239000000463 material Substances 0.000 claims description 34
- 238000002347 injection Methods 0.000 claims description 30
- 239000007924 injection Substances 0.000 claims description 30
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 27
- 239000003245 coal Substances 0.000 description 23
- 239000007787 solid Substances 0.000 description 22
- 239000000428 dust Substances 0.000 description 15
- 230000001105 regulatory effect Effects 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 230000006837 decompression Effects 0.000 description 7
- 238000002955 isolation Methods 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000005243 fluidization Methods 0.000 description 6
- 238000010926 purge Methods 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/60—Mixing solids with solids
- B01F23/69—Mixing systems, i.e. flow charts or diagrams; Arrangements, e.g. comprising controlling means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
- B01F33/404—Mixers using gas or liquid agitation, e.g. with air supply tubes for mixing material moving continuously therethrough, e.g. using impinging jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2113—Pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/2201—Control or regulation characterised by the type of control technique used
- B01F35/2203—Controlling the mixing process by feed-forward, i.e. a parameter of the components to be mixed is measured and the feed values are calculated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2211—Amount of delivered fluid during a period
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
- Y10S75/961—Treating flue dust to obtain metal other than by consolidation
Definitions
- the present invention relates to a method for introduce a second flow of powdery materials into a transport line carrying a first flow adjustable of powdery materials.
- the present invention concerns the introduction of dust extracted from blast furnace in a powdery coal flow.
- dry separators such as for example dust bags, cyclones, bag filters and electrostatic precipitators. These solid residues are collected in hoppers installed directly below the dry separators.
- Another potential solution is to inject the dust, near the blast furnace, in the pipe main pneumatic conveyor transporting coal powdery. This solution avoids unnecessary transport of dust and minimizes wear and tear on the pipes to abrasion by dust.
- coal injection is a parameter important in the operation of a blast furnace. It is therefore essential to be able to control exactly the flow of carbon injected at all times and avoid not disrupt the coal injection regime by the introduction of a second product flow in the debit powdery coal.
- the object of the present invention is to provide a process which makes it possible to introduce, in a controlled manner, a second flow of powdery materials in a pipe carrying a first regulated flow of materials pulverulent without disturbing this first flow.
- the present invention offers a method for introducing powdery materials in a pneumatic conveying line carrying a first adjustable flow rate of powdery materials, this process comprising the features of claim 1.
- the method according to the present invention presents the advantage that we can inject a second flow of powdery materials in a pneumatic system without disturb the regulation of the first flow.
- the first flow depends among other things on the conditions such as the pressure in the line at the point of dump. If you set the flow - either directly or indirectly - no longer at the point of discharge but in one point upstream of the injection point of the second flow, we sets the first flow as if a fictitious discharge point was at the regulatory point located upstream of the second injection site. Just take into account, in the parameters used to adjust the flow at this point, from the influence of the pipe end lying between the point and the actual discharge point.
- the first flow is adjusted by measuring and adjusting the first flow of powdery materials at a value predetermined upstream of the second injection point flux.
- the first flow is set by measuring the pressure and adjusting it to inside the pipe to a predetermined value in upstream of the injection point of the second flow.
- the second material flow powder is injected at the injection site in the middle of the first flow of powdery materials. This allows protect the walls of the pipes against abrasion due to particles injected.
- the second flow of materials powder is injected vertically in the direction of the flow of the first stream. This maintains the particles injected in the middle of the first material flow powdery and minimize abrasion.
- the second flow of pulverulent materials is maintained at a constant value.
- the advantage of controlling the second flow is that the disturbances caused in the system by this injection are less important and the regulation of the first flow becomes, therefore, less difficult.
- Figure 1 shows two silos 10, respectively 14 injection for powdered coal. These two silos alternately supply a discharge pipe 18 and are each equipped with a weighing system 22 making it possible to check the weight of the silo at all times and thus deduct the quantity of powdered coal evacuated per unit of time.
- the discharge line 18 is equipped a direct flow measurement device 23 and a direct flow adjustment device 24 or alternatively a pressure measuring device 26 and a pressure adjustment device 28 located upstream a device 30 for injecting a second flow of powdery products.
- the control device 23 and flow adjustment device 24 respectively the pressure control 26 and adjustment 28 allow regulate, efficiently and simply, the coal flow in pressure function in the injection silos powdered coal.
- the injection device 30 is preferably located in a vertical section of line 18 to facilitate the introduction of the second product.
- the device 30 consists of an enlarged section of the line 18 into which the second product is injected by means of an injection nozzle 34 preferably located at the middle of the enlarged section of said pipe 18. From this way, the second product, more abrasive than the coal, is kept in the middle of the coal flow which protects pipes against abrasion by particles injected.
- Line 18 leads to a distribution device 38 of powdery products as described, for example in the US Patent 5,123,632.
- this device the flow of products is divided and led to the different wind carriers and is finally injected into the blast furnace.
- the powdery material supply system injected through the nozzle 34 into the pneumatic line consists of a hopper 110 installed below a solid particle separator (not shown) of a blast furnace gas purification system.
- This hopper 110 receives the solid residues separated by the blast furnace gas separator.
- these gases blast furnaces include toxic gases like CO and more or less significant amounts of water vapor.
- Solid residues mainly consist of coke, coal and iron ore dust.
- a discharge line 112 fitted upstream of a closure member 114 for solid residues and downstream a gas-tight isolation valve 116, connects the hopper 110 to a closed cup 118.
- the closed cup 118 constitutes a thermally insulated pressure vessel, in which the discharge line 112 leads to its part superior.
- the vase 118 is equipped a fluidization device allowing to inject a gas from below, through the solid residue discharged in the closed vessel 118.
- the fluidization device is, for example, consisting of a permeable peripheral surface with gases and delimiting on the lower part of the vase 118 the solid residue storage space.
- a purge and decompression line 124 is advantageously connected to a separator 128.
- a hopper below the separator filter 128 discharges at through a discharge line 130, fitted with a valve gas tight isolation (not shown) in the vessel 118.
- the purge and decompression gases filtered by the separator 128 are discharged through a pipe drain 134 fitted with an isolation valve (not shown) gas tight.
- the gas supply to the fluidization device 120 is via a line 136 connected to a supply of gas (not shown).
- the lower end of the vase 118 opens out through an isolation valve 140 in a transport pipe pneumatic 144.
- the discharge line 112 allows, by opening the valve isolation 116 then the shutter member 114, gravity discharge of said solid residue from the hopper 110 in the closed cup 118.
- the shutter member 114 is closed at first, interrupting the discharge flow before close the gas-tight isolation valve 116.
- the purge valves and the valve are opened to allow evacuation of the gaseous content of the vessel 118.
- the fluidization device 120 is supplied with a constant flow of inert gas. This gas flow is blown from below through the solid residue to create a static bed or fluidized bed of particles solid.
- Inert gas causing the gases and vapors contained in the vessel 118 and trapped in the solid residues, is discharged through line 124, and the filter 128 in the purge line 134. In the separator 128 the mixture gas is separated from entrained solid particles.
- the closed vessel 118 is connected to a buffer silo 210 by the line 144.
- Said silo 210 is also equipped at its upper part of a decompression 214.
- This decompression 214 is advantageously connected to a separator 218.
- a hopper in the lower part of the separator 218 discharges the solid particles retained by the filter through a discharge line 222, provided a gas tight shut-off valve (not shown), in silo 210.
- the decompression gases filtered by the separator 218, are discharged through a pipe discharge 226 fitted with a sealed isolation valve 230 gas.
- This valve 230 is connected to a device for regulation 234 of the pressure controlled by a device 238 pressure measuring device permanently monitoring the pressure inside silo 210.
- a source gas supply (not shown) supplies the silo 210 into a gas by means of a pipe 242.
- a second branch 254 feeds the upper part of the silo 210 in gas. This supply is regulated by a valve 258 fitted with a regulating device 262, controlled by the pressure measuring device 238.
- This equipment makes it possible to control and adjust the pressure inside silo 210 at all times. Indeed when filling silo 210, the overpressure is released via decompression 214.
- the regulating device 234 controlled by the pressure measuring device 238 does let out only the amount of gas needed to maintain the pressure inside the silo 210 at a predetermined value.
- gas is injected into the fluidizing member and if necessary via line 254 with the valve open if the pressure falls below a set value.
- This silo 210 thanks to this pressure regulation, can be loaded and unloaded simultaneously without variation of discharge rate.
- Silo 210 is also equipped with a 266 weighing system so that you can determine the weight of the silo 210 and deduct the flow during unloading.
- the powdery materials, fluidized inside the silo 210 are evacuated through the lower part of silo 210 equipped with a shutter 270 which is controlled by a device for determining the flow rate 274 connected to the weighing system 266.
- the material flow is fluidized in a fluidization 278 located at the exit of silo 210 before the flow is not injected into the discharge line 18 via the injection device 30. This way of proceeding allows continuous injection of a controlled flow of powdery materials in the pipe 18.
- Figure 2 schematically shows a circuit tire comprising an injection device for a second flow of powdery materials and pressures reigning in this circuit.
- Curve A shows a pressure diagram of a duct not including an injection device for a second flow of pulverulent materials.
- Curve B shows a pressure diagram of a circuit comprising a device for injecting a second flow of powdery materials without adjusting device.
- the vertical arrows indicate the variations of the pressure over time in this circuit.
- pressures and consequently flow rates vary greatly and the first flow of materials, that powdered carbon, in this case, varies very strongly in function of pressure variations induced by the injection of the second stream. Under these conditions, it becomes very difficult to control the conduct of the blast furnace because we no longer know how to effectively regulate the quantity of carbon injected over time.
- curve C represents the variations of the pressure in the set circuit as described above.
- the regulatory body 24 plays an important role in adjust the pressure and therefore the flow of coal injected.
- the regulating member 24 makes it possible to work with higher supply pressure to the same powdery coal flow and this pressure is independent of variations in pressure in the remaining of the circuit.
- By opening or closing the organ of advantage regulation more or less pressure drop is created smaller, so as to adjust the pressure before said organ to pressure variations created by the device injection of the second flow of pulverulent materials. Yes the pressure increased downstream of the regulator, this one would be opened further so as to create a loss less load. If, on the contrary, the pressure decreased downstream of the regulatory body, that would be closed a little more so as to create a more pressure drop important. It is important to emphasize that this loss artificial and adjustable load does not influence the flow of injected carbon because the pressure in the tank is not not influenced by the regulatory body.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Air Transport Of Granular Materials (AREA)
- Blast Furnaces (AREA)
Description
- la Figure 1 représente un schéma général d'une installation d'injection de charbon pulvérulent et de poussières et
- la Figure 2 représente un schéma des pressions en fonction des différents points d'un circuit comprenant un point d'injection pour un deuxième flux de matériaux pulvérulents.
Claims (6)
- Procédé d'introduction d'un deuxième flux de matériaux pulvérulents dans une conduite de transport pneumatique véhiculant un premier débit réglable de matériaux pulvérulents caractérisé en ce que l'on introduit le deuxième flux de matériaux pulvérulents à un débit contrôlé et en ce qu'on règle, de manière directe ou indirecte, le premier débit à un point de régulation situé en amont du point d'injection du deuxième flux ; la pression dans la conduite étant maintenue, grâce au point de régulation, à une pression supérieure à la pression d'injection du deuxième flux, afin de rendre le débit du premier flux insensible aux perturbations engendrées par l'introduction du deuxième flux.
- Procédé selon la revendication 1, caractérisé en ce que le premier débit est réglé en mesurant et en ajustant le premier débit de matériaux pulvérulents à une valeur prédéterminée en amont du point d'injection du deuxième flux.
- Procédé selon la revendication 1, caractérisé en ce que le premier débit est réglé en mesurant la pression et en l'ajustant à l'intérieur de la conduite de transport pneumatique à une valeur prédéterminée en amont du point d'injection du deuxième flux.
- Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le deuxième flux de matériaux pulvérulents est injecté à un point d'injection situé au milieu du premier flux d'un matériaux pulvérulents.
- Procédé selon la revendication 4, caractérisé en ce que le deuxième flux de matériaux pulvérulents est injecté verticalement dans la conduite pneumatique dans le sens de l'écoulement.
- Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le deuxième débit de matériaux pulvérulents est maintenu à une valeur constante.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU88422 | 1993-11-03 | ||
LU88422A LU88422A1 (fr) | 1993-11-03 | 1993-11-03 | Procédé d'introduction d'un deuxième débit d'un matériau pulvérulent dans une conduite de transport pneumatique véhiculant un premier débit réglable de matière pulvérulente |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0651058A1 EP0651058A1 (fr) | 1995-05-03 |
EP0651058B1 true EP0651058B1 (fr) | 2000-08-23 |
Family
ID=19731450
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94114430A Expired - Lifetime EP0651058B1 (fr) | 1993-11-03 | 1994-09-14 | Procédé d'introduction d'un deuxième flux de matériaux pulvérulents dans une conduite de transport pneumatique véhiculant un premier débit réglable de matériaux pulvérulents |
Country Status (7)
Country | Link |
---|---|
US (1) | US5516356A (fr) |
EP (1) | EP0651058B1 (fr) |
BR (1) | BR9404543A (fr) |
CA (1) | CA2118262C (fr) |
DE (1) | DE69425627T2 (fr) |
LU (1) | LU88422A1 (fr) |
RU (1) | RU2150422C1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6719956B1 (en) | 2000-09-15 | 2004-04-13 | Siddhartha Gaur | Carbonaceous material products and a process for their production |
US8906336B2 (en) * | 2000-09-15 | 2014-12-09 | Siddhartha Gaur | Blast furnace metallurgical coal substitute products and method |
AUPR817201A0 (en) * | 2001-10-09 | 2001-11-01 | Technological Resources Pty Limited | Supplying solid feed materials for a direct smelting process |
GB0409318D0 (en) * | 2004-04-27 | 2004-06-02 | Its Drilling Services Ltd | Material transportation apparatus and method |
LU92037B1 (fr) * | 2012-07-06 | 2014-01-07 | Wurth Paul Sa | Dispositif de depressuration d'un reservoir sous pression de stockage de matiere granuleuse ou pulverulente, et installation de distribution de matiere pulverulente par transport pneumatique comportant un tel dispositif |
LU92534B1 (en) * | 2014-09-03 | 2016-03-04 | Wurth Paul Sa | Enhanced pressurising of bulk material in lock hoppers |
JP6742746B2 (ja) * | 2016-02-08 | 2020-08-19 | 三菱日立パワーシステムズ株式会社 | 粉体供給ホッパの加圧システム、ガス化設備およびガス化複合発電設備ならびに粉体供給ホッパの加圧方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0211295A1 (fr) * | 1985-08-05 | 1987-02-25 | Paul Wurth S.A. | Procédé et dispositif d'injection, par voie pneumatique, de quantités dosées de matières pulvérulentes dans une enceinte se trouvant sous pression variable |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR687234A (fr) * | 1929-12-26 | 1930-08-06 | Dispositif pour doser et mélanger des liquides | |
US3337195A (en) * | 1966-03-15 | 1967-08-22 | Grace W R & Co | Foam generating apparatus |
FR2319410A1 (fr) * | 1975-07-31 | 1977-02-25 | Aquitaine Petrole | Installation optimisee pour la dispersion des gaz de rejet |
JP2827451B2 (ja) * | 1990-05-15 | 1998-11-25 | 住友金属工業株式会社 | 高炉羽口粉体吹き込み操業法 |
JPH05239511A (ja) * | 1991-02-28 | 1993-09-17 | Nippon Steel Corp | 高炉羽口への粉体吹込み方法 |
US5447550A (en) * | 1994-09-21 | 1995-09-05 | Hylsa S.A. De C.V. | Method and apparatus for the pneumatic transport of iron-bearing particles |
-
1993
- 1993-11-03 LU LU88422A patent/LU88422A1/fr unknown
-
1994
- 1994-09-14 EP EP94114430A patent/EP0651058B1/fr not_active Expired - Lifetime
- 1994-09-14 DE DE69425627T patent/DE69425627T2/de not_active Expired - Lifetime
- 1994-10-17 CA CA002118262A patent/CA2118262C/fr not_active Expired - Lifetime
- 1994-10-25 US US08/328,677 patent/US5516356A/en not_active Expired - Lifetime
- 1994-11-01 BR BR9404543A patent/BR9404543A/pt not_active IP Right Cessation
- 1994-11-03 RU RU94040172/28A patent/RU2150422C1/ru active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0211295A1 (fr) * | 1985-08-05 | 1987-02-25 | Paul Wurth S.A. | Procédé et dispositif d'injection, par voie pneumatique, de quantités dosées de matières pulvérulentes dans une enceinte se trouvant sous pression variable |
Also Published As
Publication number | Publication date |
---|---|
DE69425627D1 (de) | 2000-09-28 |
CA2118262C (fr) | 2005-11-22 |
BR9404543A (pt) | 1995-07-04 |
RU94040172A (ru) | 1996-09-20 |
EP0651058A1 (fr) | 1995-05-03 |
DE69425627T2 (de) | 2001-04-19 |
RU2150422C1 (ru) | 2000-06-10 |
CA2118262A1 (fr) | 1995-05-04 |
LU88422A1 (fr) | 1995-07-10 |
US5516356A (en) | 1996-05-14 |
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