EP0913486B1 - Verfahren zum Granulieren und Zerkleinern von schmelzflüssigem Material sowie Vorrichtung zur Durchführung dieses Verfahrens - Google Patents
Verfahren zum Granulieren und Zerkleinern von schmelzflüssigem Material sowie Vorrichtung zur Durchführung dieses Verfahrens Download PDFInfo
- Publication number
- EP0913486B1 EP0913486B1 EP98890321A EP98890321A EP0913486B1 EP 0913486 B1 EP0913486 B1 EP 0913486B1 EP 98890321 A EP98890321 A EP 98890321A EP 98890321 A EP98890321 A EP 98890321A EP 0913486 B1 EP0913486 B1 EP 0913486B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- vapour
- jet mill
- water
- duct
- 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 abstract description 21
- 239000012768 molten material Substances 0.000 title claims abstract description 5
- 239000008187 granular material Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000155 melt Substances 0.000 claims abstract description 8
- 239000002893 slag Substances 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 5
- 239000003380 propellant Substances 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000009991 scouring Methods 0.000 claims 1
- 238000005469 granulation Methods 0.000 abstract description 6
- 230000003179 granulation Effects 0.000 abstract description 6
- 238000010298 pulverizing process Methods 0.000 abstract 1
- 238000000227 grinding Methods 0.000 description 17
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 10
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- -1 however Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/032—Separating slag from liquid, e.g. from water, after quenching
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/068—Receptacle features where the slag is treated with a sealed or controlled environment
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/076—Fluidised bed for cooling
Definitions
- the invention relates to a method for granulating and Crushing of molten material, e.g. Blast furnace slag, at which the melt is introduced into water and the solidified granulate is discharged and onto a device to carry out this procedure.
- molten material e.g. Blast furnace slag
- a process for granulating and crushing molten liquid Material is described for example in AT-B-400 140.
- melt was in a Mixing chamber introduced under pressure, being in the mixing chamber Pressurized water, steam or water / steam mixtures have been injected. Due to the rapid expansion, this became known Procedure a pressure built up, which via a diffuser to Expulsion of the solidified particles leads to the kinetic Particle energy was used for comminution.
- Purpose was arranged after the diffuser baffle plates or the exit jet of the diffuser against the exit jet another diffuser directed.
- the granulation of blast furnace slags generally produces significant amounts of hydrogen sulfide, which subsequently necessitates a correspondingly complex cleaning of the steam.
- sulfur can have quite desirable effects.
- the process according to the invention therefore aims not only to find sufficiency with relatively small-sized units and to achieve high fineness levels with the greatest possible energetic use of the sensible heat and the steam produced during granulation, but also to prevent degassing of hydrogen sulfide and H 2 S predominantly set in the granulate.
- the method according to the invention exists to achieve this object essentially in that the water is in a pressure-resistant Reaction space is submitted that the reaction space under one Vapor pressure of more than 2.5 bar, in particular more than 5 bar, is set that the solidified granules are drained and in a jet mill is transferred and that the jet mill with Steam is operated. Because the water in a pressure-resistant Reaction space is submitted, a vapor pressure of more than 2.5 bar are maintained, which leads to that there is no hydrogen sulfide degassing. hydrogen sulfide can therefore in amounts of about 80 wt.% in the glassy solidifying granules are bound.
- the jet mill according to the invention with the steam formed when the melt solidifies is operated.
- This vapor which still contains residual hydrogen sulfide, is Grinding chamber further cleaned at the same time because of additional hydrogen sulfide can be bound in the grinding room, the majority of the steam can be circulated.
- the method according to the invention is therefore advantageously carried out in such a way that that the steam formed in the reaction chamber in countercurrent is overheated to the liquid slag jet and into a fluidized bed counter jet mill is injected and relaxed.
- the injection can separate from the introduction of the granules in this case the fluidized bed jet mill take place, which makes it a special there is little wear on the nozzles.
- the regrind which is present as pre-chilled hot granules, via a pressure-relaxation dosing system was added to the grinding fluid bed become.
- the fineness of grinding can be increased in that, as one corresponds to preferred implementation of the method according to the invention, the vapor withdrawn from the reaction space before the Jet mill via reheating with additional fuels to be led.
- the method according to the invention can also be carried out in this way be that the granules formed in the reaction chamber over a Pressure lock is applied and drained and into the Fluid bed jet mill is injected with steam as the propellant, the slag granules in the manner of a solid-matter injector can be injected accelerated into the fluidized bed.
- the grinding efficiency can be significantly higher than that immediate introduction into the fluidized bed can be increased.
- the wear in the for Acceleration and the introduction of the granules provided Nozzles.
- the inventive device for performing the inventive The procedure is such that in a swivel pan is arranged for the absorption of the melt that on the pressure-resistant Container a pressurized water line is connected that a granulate sludge is arranged at the bottom of the container, which is connected to a jet mill via a line and that to the flameproof closable container a line for the steam formed is connected, which with nozzles of Jet mill is connected.
- a pressurized water line is connected that a granulate sludge is arranged at the bottom of the container, which is connected to a jet mill via a line and that to the flameproof closable container a line for the steam formed is connected, which with nozzles of Jet mill is connected.
- the training is advantageously made so that between Slag pan and the water-containing part of the reaction space a shaft with a slag jet diameter exceeding Cross section is arranged.
- the injection of such may still contain hydrogen sulfide Steam into the fluidized bed counter jet mill contained in the closed system leads to the fact that more quantities Hydrogen sulfide can be set in the grinding room.
- the Pressure in the grinding chamber can be subatmospheric and Reach values of up to 0.1 bar, which makes it particularly efficient is achieved.
- FIG. 1 shows a first embodiment in which the Granulate in the fluidized bed of the fluid bed counter jet mill is introduced, which is operated with steam and
- Fig. 2nd is a schematic representation of a solid fuel injector for the Immediate introduction of the drained granulate with the Steam as motive steam in the fluid bed.
- Fig. 1 is a pressure-resistant container, which can be closed pressure-tight by a cover 2.
- the container 1 is a pan 3 for receiving liquid melt arranged to pivot about an axis 4.
- the slag pan 3 can slag in free fall via a slag shaft 20 in the lower area of the pressure-resistant Container are poured in which pressurized water over a line 5 was introduced.
- the slag is in a water bath 6 pelletized and can via a pelletizer 7 and Line 8 into a downstream fluidized bed counter jet mill 9 be transferred.
- the can by introducing the The resulting saturated steam is dried in the water and, if necessary, partially overheated, this steam as dry steam via line 10 in the head region of the pressure-resistant container 1 can be deducted.
- the dry steam can subsequently over a superheater 11, which is operated with additional fuel, be heated further and into the ring line 12 to the nozzles 13 the fluidized bed counter jet mill 9 are directed.
- the steam relaxes in the mill, with an intense in the fluidized bed Grinding effect on that applied to the fluidized bed via line 8 Granules are exercised.
- the fines can be over Sifter 14 and a line 15 are deployed.
- At the bottom of the Fluidized bed jet mill can coolant via a line 17 be fed.
- Hydrogen sulfide discharged with the fine material can be in easily separated from the steam and by combustion to be separated from the vapor stream to sulfur.
- This propellant steam can go directly to the head of the pressure-resistant container 1 can be removed via line 10.
- the motive steam can also via the heater 11 and / or a dry steam compressor, not shown, are guided, before it is placed in the solid fuel injector.
- the granules is from the injector in the grinding chamber 16 of the fluidized bed jet mill 9 introduced, which makes a particularly high Efficiency is achieved.
- the enthalpy of conversion the motive steam in the fluid bed is used for the grinding work, also for a faster pressure reduction in the grinding chamber Water can be injected into it.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Disintegrating Or Milling (AREA)
Description
Claims (8)
- Verfahren zum Granulieren und Zerkleinern von schmelzflüssigem Material, wie z.B. Hochofenschlacken, bei welchem die Schmelze in Wasser eingetragen wird und das erstarrte Granulat ausgetragen wird, dadurch gekennzeichnet, daß das Wasser in einem druckfesten Reaktionsraum vorgelegt wird, daß der Reaktionsraum unter einem Dampfdruck von mehr als 2,5 bar, insbesondere mehr als 5 bar, gesetzt wird, daß das erstarrte Granulat abgeschlämmt und in eine Strahlmühle (9) übergeführt wird und daß die Strahlmühle (9) mit Dampf betrieben wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der im Reaktionsraum gebildete Dampf im Gegenstrom zum flüssigen Schlackenstrahl überhitzt wird und in eine Fließbett-Gegenstrahlmühle (9) eingedüst und entspannt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der aus dem Reaktionsraum abgezogene Dampf vor der Strahlmühle (9) über eine Nacherhitzung mit Zusatzbrennstoffen geführt wird.
- Verfahren nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß das im Reaktionsraum gebildete Granulat über eine Druckschleuse ausgebracht und abgeschlämmt wird und in eine Fließbett-Strahlmühle (9) mit Dampf als Treibgas eingedüst wird.
- Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß in einem druckfest verschließbaren Behälter (1) eine schwenkbare Pfanne (3) für die Aufnahme der Schmelze angeordnet ist, daß an den druckfesten Behälter (1) eine Druckwasserleitung (5) angeschlossen ist, daß am Boden des Behälters ein Granulat-Abschlämmer (7) angeordnet ist, welcher über eine Leitung (8) mit einer Strahlmühle (9) verbunden ist und daß an den druckfest verschließbaren Behälter (1) eine Leitung (10) für den gebildeten Dampf angeschlossen ist, welche mit Düsen (13) der Strahlmühle (9) verbunden ist.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß in die Dampfleitung ein Überhitzer (11) und/oder Verdichter eingeschaltet ist.
- Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Dampfleitung an als Feststoff-Injektoren (18) ausgebildete Düsen für den Eintrag des abgeschlämmten Granulates in eine Fließbett-Strahlmühle (9) angeschlossen ist.
- Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß zwischen Schlackenpfanne (3) und dem Wasser enthaltenden Teil des Reaktionsraumes ein Schacht (20) mit den Schlackenstrahldurchmesser übersteigendem Querschnitt angeordnet ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT68497U | 1997-11-03 | ||
| AT684/97U | 1997-11-03 | ||
| AT68497 | 1997-11-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0913486A1 EP0913486A1 (de) | 1999-05-06 |
| EP0913486B1 true EP0913486B1 (de) | 2002-01-16 |
Family
ID=3497095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98890321A Expired - Lifetime EP0913486B1 (de) | 1997-11-03 | 1998-11-03 | Verfahren zum Granulieren und Zerkleinern von schmelzflüssigem Material sowie Vorrichtung zur Durchführung dieses Verfahrens |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0913486B1 (de) |
| AT (1) | ATE212067T1 (de) |
| DE (1) | DE59802619D1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE511261A (de) * | 1900-01-01 | |||
| DE1184689B (de) * | 1958-01-21 | 1964-12-31 | Rothstein & Co K G | Verfahren und Vorrichtung zur Granulation eines in einen Behaelter einfallenden Schlackenstromes |
| DE2444197C2 (de) * | 1974-09-16 | 1985-11-07 | Becker, Winfried, 4300 Essen | Verfahren zur Herstellung granulierter Hochofenschlacke |
| JPS5227096A (en) * | 1975-08-28 | 1977-03-01 | Ishikawajima Harima Heavy Ind Co Ltd | Apparatus for heat recovery of molten slag |
| JPH06158124A (ja) * | 1992-11-17 | 1994-06-07 | Nippon Steel Corp | 製鋼スラグの冷却処理方法 |
-
1998
- 1998-11-03 DE DE59802619T patent/DE59802619D1/de not_active Expired - Fee Related
- 1998-11-03 EP EP98890321A patent/EP0913486B1/de not_active Expired - Lifetime
- 1998-11-03 AT AT98890321T patent/ATE212067T1/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE59802619D1 (de) | 2002-02-21 |
| EP0913486A1 (de) | 1999-05-06 |
| ATE212067T1 (de) | 2002-02-15 |
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