EP1038976A1 - Method of granulating and pulverizing slag or metal melts - Google Patents
Method of granulating and pulverizing slag or metal melts Download PDFInfo
- Publication number
- EP1038976A1 EP1038976A1 EP00890083A EP00890083A EP1038976A1 EP 1038976 A1 EP1038976 A1 EP 1038976A1 EP 00890083 A EP00890083 A EP 00890083A EP 00890083 A EP00890083 A EP 00890083A EP 1038976 A1 EP1038976 A1 EP 1038976A1
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- European Patent Office
- Prior art keywords
- cooling chamber
- slag
- temperatures
- walls
- droplets
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/086—Cooling after atomisation
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- 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
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
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- 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
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- 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
- C21B2400/074—Tower structures for cooling, being confined but not sealed
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/08—Treatment of slags originating from iron or steel processes with energy recovery
Definitions
- the invention relates to a method for granulating and Crushing liquid melts, especially slags or Metal melting, in which the liquid slags with a Fluid jet are sprayed into a cooling chamber.
- a number of parameters are included in the differential equation for the particle temperature during cooling by radiation, the radiation cooling being highly dependent on the temperature difference between the particle temperature and the wall temperature of the radiation cooler.
- the temperature dependence in such a differential equation for the particle temperature indicates the respective temperatures with the fourth power, the difference from T s 4 - T w 4 being taken into account as a factor for the decrease in the particle temperature over time.
- T s denotes the particle temperature and T w the wall temperature.
- other parameters that are included in the differential equation for the particle temperature T s (t) are also characteristic variables, such as the emissivity of the slag particles and the wall surface.
- Hot slag particles largely behave as ideal emitters and therefore the known differential equations apply with very high accuracy. From the temperature dependency it now follows that an increase in the initial temperature has a great influence on the heat flux density through the surrounding walls and could thereby increase the efficiency of the radiation cooling.
- the invention now aims to address these theoretical considerations practically implement and a process of the beginning to create the type mentioned, which with conventional spraying and particle diameters of about 50 to further increase the efficiency of radiation cooling allowed.
- the method according to the invention exists to achieve this object essentially in that the sprayed melt droplets in Spray jet afterburning hot gases inside the Cooling chamber are heated and that the walls of the cooling chamber to surface temperatures below 400 ° C, preferably below Cooled 300 ° C. Molten slags are usually present with temperatures between 1300 ° and 1400 ° C. Because now this temperature when entering the cooling chamber is further increased by post-combustion, it succeeds in raising the particle temperature further to this Way the efficiency of radiation cooling due to the dependency of the fourth power to increase this temperature.
- the Firing chamber temperature or the temperature in the afterburning zone can be 200 ° to 300 ° C higher than the original one Slag temperature, which results in better heat transfer at the same time with a higher turbulence and another Droplet disintegration is achieved. So it will be with the improvement heat transfer simultaneously through further disintegration and turbulence increases the residence time so that the Radiation cooling efficiency significantly above conventional Extent can be improved. At the same time leads the increase in slag temperatures after entering the Radiation cooler to reduce slag viscosity and the surface tension, which results in the turbulence shear forces cause further droplet size reduction. Due to the high temperature differences can be special highly energetic steam are generated, including supercritical Vapor states can be achieved.
- blast furnace slags or slags from waste incineration plants can be inventively also slag from a furnace, Melting metals or melting special alloys for manufacturing of microsinter and special glass melts through the effectively disintegrate the increase in temperature according to the invention and cool quickly, with particularly favorable geometric Shapes, especially spherical contours or spheres the droplets of slag can be formed. All in all can thus be by the afterburning inside the cooling chamber further increase the efficiency of radiation cooling, the means for cooling the slag droplets designed much smaller than conventional facilities can be, so that the space required for such coolers is reduced becomes.
- the process according to the invention is advantageously carried out in such a way that hot gases with a CO and H 2 content of 20-35% by volume are burned stoichiometrically in a post-combustion zone with hot air in the interior of the cooling chamber.
- hot gases with such proportions of carbon monoxide and hydrogen can be effectively combusted with preheated air in order to ensure the desired combustion chamber temperature or the desired temperature in the afterburning zone, with rapid heating also being achieved with regard to the behavior of the slag droplets as largely ideal emitters , as a result of rapid cooling by the radiation cooler.
- Effective radiation cooling can be achieved that the chamber-like walls of the radiation cooler with pressurized water be pressurized at a pressure of 10 to 220 bar and that high pressure steam at temperatures of 200 to 400 ° C and a pressure of 10 to 220 bar from the chamber-like walls is subtracted.
- 1 denotes a slag tundish, in what molten slag at temperatures between 1300 ° and 1400 ° C is kept in stock.
- the molten Slag is in the form of very fine droplets 3 in a radiation cooler 4 ejected, the ejection by pressing of fluid via a lance 5.
- the fluid can be steam, hot gas sub-stoichiometrically burned hot gas or water are used, the formation of the finest droplets by a height-adjustable, tubular weir 6, which in the Meaning of the double arrow 7 can be raised and lowered, can be varied.
- the fine droplets leave them Slag outlet opening 22 of the tundish, being a substantially tubular slag jet is formed, the wall thickness from the distance 8 between the lower edge of the tubular Weir 6 and the outlet opening 22 is determined.
- a line 11th Pressurized water introduced at a pressure of 10 to 220 bar.
- the wall temperature of the radiation cooler 4 can thereby reduce about 200 ° C, 12 high pressure steam via line at temperatures from 200 ° to 400 ° C under a pressure of 10 to 220 bar is deducted.
- Due to the high temperature difference due to the extremely fine distribution of the droplets and the shear forces and turbulent forces exerted by the burner 9 Currents there is a rapid cooling of the fine Slag particles 3, which at the outlet of the radiation cooler 4th with temperatures below 600 ° C in a downstream enter further cooler 13, which is of conventional design can be and designed as a convection steam boiler with natural circulation can be.
- the boiler tubes of this convection boiler are designated 14 here.
- the rising hot water or the Steam formed passes into a steam drum 15, steam is withdrawn via a line 16.
- the condensed water arrives via a downpipe 17 back into the boiler tubes 14.
- At 18 is another cooler, which acts as a combustion air preheater can be used, indicated, the derivation 19 of this cooler with the supply of hot air via line 10 the burners 9 can be connected.
- microgranules with particle diameters of about 50 ⁇ m discharged via a rotary valve 20, with the connection 21 exhaust gases with temperatures of about 200 ° C deducted can be.
- the microgranules are mostly amorphous or glassy in front. Due to the extremely rapid cooling, the Spraying molten metal like metallic glass is used for the production of superconductors, educated.
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zum Granulieren und Zerkleinern von flüssigen Schmelzen, insbesondere Schlacken oder Metallschmelzen, bei welchem die flüssigen Schlacken mit einem Fluidstrahl in eine Kühlkammer versprüht werden.The invention relates to a method for granulating and Crushing liquid melts, especially slags or Metal melting, in which the liquid slags with a Fluid jet are sprayed into a cooling chamber.
Aus theoretischen Überlegungen ist es bekannt, daß die Kühlgeschwindigkeit von Teilchen vom Durchmesser der Teilchen abhängig ist. Die Strahlungskühlung nimmt mit abnehmender Teilchengröße stark zu und ist aus diesem Grunde bereits bekannt geworden, Schlacken möglichst fein zu versprühen, wobei auf diese Weise Teilchendurchmesser zwischen 10 und 300 µm im Falle von flüssigen Schlacken mit Ausgangstemperaturen von etwa 1350° C ohne weiteres erzielbar waren. Es ist weiters aus theoretischen Überlegungen bekannt, daß die Strahlungskühlung in hohem Maße von der Verweilzeit der Teilchen im Strahlungskühler und damit von der Teilchengeschwindigkeit abhängig ist. Eine höhere Teilchengeschwindigkeit führt zu einer geringeren Strahlungskühlung, da die Verweilzeit im Kühler rasch abnimmt. Kleine Partikel werden nun durch die Treibgasströmung in einem derartigen Strahlungskühler schneller beschleunigt, was zu kleineren Verweilzeiten führt. Hohe Wärmeflußdichten setzen aber nun sowohl kleine Teilchen als auch kleine Teilchengeschwindigkeiten voraus, wobei die entsprechenden theoretischen Überlegungen sich aus den für die Abkühlung von Teilchen geltenden Differentialgleichungen ergeben.It is known from theoretical considerations that the cooling rate depends on particles on the diameter of the particles is. Radiation cooling increases with decreasing particle size strong and has already become known for this reason Spray slag as finely as possible, doing this Particle diameter between 10 and 300 µm in the case of liquid Slag with starting temperatures of around 1350 ° C without more were achievable. It is also out of theoretical considerations known that the radiation cooling to a large extent by the residence time of the particles in the radiation cooler and thus of is dependent on the particle speed. A higher particle speed leads to less radiation cooling because the dwell time in the cooler decreases rapidly. Small particles become now through the propellant gas flow in such a radiation cooler accelerated faster, resulting in shorter dwell times leads. However, high heat flux densities now set both small particles as well as small particle velocities ahead, the corresponding theoretical considerations derive from the for the Cooling of particles yield applicable differential equations.
In die Differentialgleichung für die Teilchentemperatur bei einer Abkühlung durch Strahlung gehen eine Reihe von Parametern ein, wobei die Strahlungskühlung in hohem Maße von der Temperaturdifferenz zwischen der Teilchentemperatur und der Wandtemperatur des Strahlungskühlers abhängt. Die Temperaturabhängigkeit in einer derartigen Differentialgleichung für die Teilchentemperatur weist die jeweiligen Temperaturen mit der vierten Potenz aus, wobei für die Abnahme der Teilchentemperatur über die Zeit die Differenz aus Ts 4 - Tw 4 als Faktor eingeht. Ts bezeichnet hiebei die Teilchentemperatur und Tw die Wandtemperatur. Weitere in die Differentialgleichung für die Teilchentemperatur Ts(t) eingehende Parameter sind neben der Partikelmasse und der Wärmekapazität, welche zur Temperaturabnahme umgekehrt proportional sind, auch charakteristische Größen, wie die Emissivität der Schlackenteilchen und die Wandoberfläche. Heiße Schlackenteilchen verhalten sich weitestgehend als ideale Strahler und es gelten daher die bekannten Differentialgleichungen mit sehr hoher Genauigkeit. Aus der Temperaturabhängigkeit ergibt sich nun, daß eine Erhöhung der Ausgangstemperatur in hohem Ausmaß die Wärmeflußdichte durch die umgebenden Wände beeinflußt und dadurch die Effizienz der Strahlungskühlung steigern könnte.A number of parameters are included in the differential equation for the particle temperature during cooling by radiation, the radiation cooling being highly dependent on the temperature difference between the particle temperature and the wall temperature of the radiation cooler. The temperature dependence in such a differential equation for the particle temperature indicates the respective temperatures with the fourth power, the difference from T s 4 - T w 4 being taken into account as a factor for the decrease in the particle temperature over time. T s denotes the particle temperature and T w the wall temperature. In addition to the particle mass and the heat capacity, which are inversely proportional to the temperature decrease, other parameters that are included in the differential equation for the particle temperature T s (t) are also characteristic variables, such as the emissivity of the slag particles and the wall surface. Hot slag particles largely behave as ideal emitters and therefore the known differential equations apply with very high accuracy. From the temperature dependency it now follows that an increase in the initial temperature has a great influence on the heat flux density through the surrounding walls and could thereby increase the efficiency of the radiation cooling.
Die Erfindung zielt nun darauf ab, diese theoretischen Überlegungen praktisch umzusetzen und ein Verfahren der eingangs genannten Art zu schaffen, welches bei konventionellem Versprühen und auf diese Weise erzielten Teilchendurchmessern von etwa 50 um die Effizienz der Strahlungskühlung weiter zu erhöhen gestattet.The invention now aims to address these theoretical considerations practically implement and a process of the beginning to create the type mentioned, which with conventional spraying and particle diameters of about 50 to further increase the efficiency of radiation cooling allowed.
Zur Lösung dieser Aufgabe besteht das erfindungsgemäße Verfahren im wesentlichen darin, daß die versprühten Schmelzentröpfchen im Sprühstrahl durch Nachverbrennung von Heißgasen im Inneren der Kühlkammer aufgeheizt werden und daß die Wände der Kühlkammer auf Oberflächentemperaturen von unter 400° C, vorzugsweise unter 300° C gekühlt werden. Schmelzflüssige Schlacken liegen üblicherweise mit Temperaturen zwischen 1300° und 1400° C vor. Dadurch, daß nun diese Temperatur beim Eintritt in die Kühlkammer durch eine Nachverbrennung weiter gesteigert wird, gelingt es die Teilchentemperatur weiter anzuheben, um auf diese Weise die Effizienz der Strahlungskühlung aufgrund der Abhängigkeit von der vierten Potenz dieser Temperatur zu erhöhen. Die Brennkammertemperatur bzw. die Temperatur in der Nachverbrennungszone kann 200° bis 300° C höher liegen, als die ursprüngliche Schlackentemperatur, wodurch ein besserer Wärmeübergang gleichzeitig mit einer höheren Turbulenz und einer weiteren Tröpfchendesintegration erzielt wird. Es wird somit mit der Verbesserung des Wärmeüberganges gleichzeitig durch weitere Desintegration und Turbulenz die Verweilzeit erhöht, sodaß die Effizienz der Strahlungskühlung wesentlich über das konventionelle Ausmaß hinaus verbessert werden kann. Gleichzeitig führt die Erhöhung der Schlackentemperaturen nach dem Eintritt in den Strahlungskühler zu einer Verringerung der Schlackenviskosität und der Oberflächenspannung, was dazu führt, daß die Turbulenzscherkräfte eine weitere Tröpfchenzerkleinerung bewirken. Bedingt durch die hohen Temperaturendifferenzen kann besonders hoch energetischer Dampf erzeugt werden, wobei auch überkritische Dampfzustände erzielbar sind. Neben Hochofenschlacken oder Schlacken aus Müllverbrennungsanlagen lassen sich erfindungsgemäß auch Schlacken aus einer Schmelzkammerfeuerung, Metallschmelzen oder Schmelzen von Speziallegierungen zur Herstellung von Mikrosinter und Spezialglasschmelzen durch die erfindungsgemäße Erhöhung der Temperatur wirkungsvoll desintegrieren und rasch abkühlen, wobei besonders günstige geometrische Formen, insbesondere sphärische Konturen oder Kügelchen der Schlackentröpfchen ausgebildet werden können. Insgesamt läßt sich somit durch die Nachverbrennung im Inneren der Kühlkammer die Effizienz der Strahlungskühlung weiter steigern, wobei die Einrichtungen zum Abkühlen der Schlackentröpfchen wesentlich kleiner als konventionelle Einrichtungen ausgebildet werden können, sodaß der Platzbedarf für derartige Kühler verringert wird.The method according to the invention exists to achieve this object essentially in that the sprayed melt droplets in Spray jet afterburning hot gases inside the Cooling chamber are heated and that the walls of the cooling chamber to surface temperatures below 400 ° C, preferably below Cooled 300 ° C. Molten slags are usually present with temperatures between 1300 ° and 1400 ° C. Because now this temperature when entering the cooling chamber is further increased by post-combustion, it succeeds in raising the particle temperature further to this Way the efficiency of radiation cooling due to the dependency of the fourth power to increase this temperature. The Firing chamber temperature or the temperature in the afterburning zone can be 200 ° to 300 ° C higher than the original one Slag temperature, which results in better heat transfer at the same time with a higher turbulence and another Droplet disintegration is achieved. So it will be with the improvement heat transfer simultaneously through further disintegration and turbulence increases the residence time so that the Radiation cooling efficiency significantly above conventional Extent can be improved. At the same time leads the increase in slag temperatures after entering the Radiation cooler to reduce slag viscosity and the surface tension, which results in the turbulence shear forces cause further droplet size reduction. Due to the high temperature differences can be special highly energetic steam are generated, including supercritical Vapor states can be achieved. In addition to blast furnace slags or slags from waste incineration plants can be inventively also slag from a furnace, Melting metals or melting special alloys for manufacturing of microsinter and special glass melts through the effectively disintegrate the increase in temperature according to the invention and cool quickly, with particularly favorable geometric Shapes, especially spherical contours or spheres the droplets of slag can be formed. All in all can thus be by the afterburning inside the cooling chamber further increase the efficiency of radiation cooling, the means for cooling the slag droplets designed much smaller than conventional facilities can be, so that the space required for such coolers is reduced becomes.
Mit Vorteil wird das erfindungsgemäße Verfahren so durchgeführt, daß im Inneren der Kühlkammer Heißgase mit einem CO und H2 Anteil von 20 - 35 Vol% stöchiometrisch in einer Nachverbrennungszone mit Heißluft verbrannt werden. Heißgase mit derartigen Anteilen an Kohlenmonoxid und Wasserstoff können auf diese Weise mit vorgewärmter Luft wirkungsvoll nachverbrannt werden, um die gewünschte Brennkammertemperatur bzw. gewünschte Temperatur in der Nachverbrennungszone sicherzustellen, wobei mit Rücksicht auf das Verhalten der Schlackentröpfchen als weitestgehend ideale Strahler eine rasche Erwärmung ebenso erzielt wird, wie in der Folge eine rasche Abkühlung durch den Strahlungskühler. The process according to the invention is advantageously carried out in such a way that hot gases with a CO and H 2 content of 20-35% by volume are burned stoichiometrically in a post-combustion zone with hot air in the interior of the cooling chamber. In this way, hot gases with such proportions of carbon monoxide and hydrogen can be effectively combusted with preheated air in order to ensure the desired combustion chamber temperature or the desired temperature in the afterburning zone, with rapid heating also being achieved with regard to the behavior of the slag droplets as largely ideal emitters , as a result of rapid cooling by the radiation cooler.
Mit Vorteil wird hiebei so vorgegangen, daß die Tröpfchen in einer Nachverbrennungszone des Strahlungskühler auf Temperaturen zwischen 1500° C und 1750° C aufgeheizt werden, wobei diese Temperaturen naturgemäß für Spezialgasschmelzen und Sonderanwendungen auch noch höher gewählt werden können, um die Effizienz zu steigern. Temperaturen zwischen 1500° und 1750° C und die durch die Nachverbrennung bedingten Turbulenz sind jedoch für Hochofenschlacken, Müllverbrennungsschlacken oder Schmelzen aus der Schmelzkammerfeuerung mit Vorteil einsetzbar und führen unmittelbar zu sphärischen, glasig erstarrenden Partikelchen mit besonders kleinen Durchmessern.It is advantageous to proceed in such a way that the droplets in a post-combustion zone of the radiation cooler to temperatures be heated between 1500 ° C and 1750 ° C, these Temperatures naturally for special gas melts and special applications even higher can be chosen to increase efficiency to increase. Temperatures between 1500 ° and 1750 ° C and the turbulence caused by afterburning are however for Blast furnace slag, waste incineration slag or smelting the melting chamber firing can be used and lead with advantage with spherical, glassy solidifying particles especially small diameters.
Eine wirkungsvolle Strahlungskühlung läßt sich dadurch erzielen, daß die kammerartigen Wände des Strahlungskühlers mit Druckwasser unter einem Druck von 10 bis 220 bar beaufschlagt werden und daß Hochdruckdampf bei Temperaturen von 200 bis 400° C und einem Druck von 10 bis 220 bar aus den kammerartigen Wänden abgezogen wird.Effective radiation cooling can be achieved that the chamber-like walls of the radiation cooler with pressurized water be pressurized at a pressure of 10 to 220 bar and that high pressure steam at temperatures of 200 to 400 ° C and a pressure of 10 to 220 bar from the chamber-like walls is subtracted.
Die Erfindung wird nachfolgend anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispieles einer für die Durchführung des erfindungsgemäßen Verfahrens geeigneten Einrichtung näher erläutert.The invention is described below with reference to a drawing schematically illustrated embodiment of one for the Implementation of the method suitable device explained in more detail.
In der Zeichnung ist mit 1 ein Schlackentundish bezeichnet, in
welchem schmelzflüssige Schlacken bei Temperaturen zwischen
1300° und 1400° C vorrätig gehalten ist. Die schmelzflüssige
Schlacke wird in Form von feinsten Tröpfchen 3 in einen Strahlungskühler
4 ausgestossen, wobei der Ausstoß durch Einpressen
von Fluid über eine Lanze 5 erfolgt. Als Fluid kann Dampf, Heißgas
unterstöchiometrisch verbranntes Heißgas oder auch Wasser
zum Einsatz gelangen, wobei die Ausbildung feinster Tröpfchen
durch ein höhenverstellbares, rohrförmiges Wehr 6, welches im
Sinne des Doppelpfeiles 7 angehoben und abgesenkt werden kann,
variiert werden kann. Die feinen Tröpfchen verlassen die
Schlackenaustrittsöffnung 22 des Tundish, wobei ein im wesentlichen
rohrförmiger Schlackenstrahl gebildet wird, dessen Wandstärke
vom Abstand 8 zwischen der Unterkante des rohrförmigen
Wehres 6 und der Austrittsöffnung 22 bestimmt ist.In the drawing, 1 denotes a slag tundish, in
what molten slag at temperatures between
1300 ° and 1400 ° C is kept in stock. The molten
Slag is in the form of very
Unmittelbar nach dem Eintritt der Schlackentröpfchen 3 in den
Strahlungskühler 4 sind nun Brenner 9 angeordnet, welche über
eine Leitung 10 mit Brenngasen und Heißluft versorgt werden. Die
Verbrennung wird stöchiometrisch geführt und die Temperatur der
Schlackentröpfchen um etwa 300° C über die Temperatur der
Schlacke 2 im Schlackentundish 1 angehoben.Immediately after the
In die Wände des Strahlungskühlers 4 wird über eine Leitung 11
Druckwasser unter einem Druck von 10 bis 220 bar eingebracht.
Die Wandtemperatur des Strahlungskühlers 4 läßt sich dadurch auf
etwa 200° C herabsetzen, wobei über die Leitung 12 Hochdruckdampf
bei Temperaturen von 200° bis 400° C unter einem Druck von
10 bis 220 bar abgezogen wird. Aufgrund der hohen Temperaturdifferenz,
der überaus feinen Verteilung der Tröpfchen und aufgrund
der durch die Brenner 9 ausgeübten Scherkräfte und turbulenten
Strömungen erfolgt eine rasche Abkühlung der feinen
Schlackenteilchen 3, welche am Ausgang des Strahlungskühlers 4
mit Temperaturen von unter 600° C in einen nachgeschalteten
weiteren Kühler 13 eintreten, welcher konventionell ausgebildet
sein kann und als Konvektionsdampfkessel mit Naturumlauf ausgebildet
sein kann. Die Siederohre dieses Konvektionskessels sind
hiebei mit 14 bezeichnet. Das aufsteigende Heißwasser bzw. der
gebildete Dampf gelangt in eine Dampftrommel 15, wobei Dampf
über eine Leitung 16 abgezogen wird. Das kondensierte Wasser gelangt
über ein Fallrohr 17 wiederum zurück in die Siederohre 14.In the walls of the
Mit 18 ist ein weiterer Kühler, welcher als Verbrennungsluftvorwärmer
eingesetzt werden kann, angedeutet, wobei die Ableitung
19 dieses Kühlers mit der Heißluftzufuhr über die Leitung 10 zu
den Brennern 9 verbunden werden kann.At 18 is another cooler, which acts as a combustion air preheater
can be used, indicated, the
Das Mikrogranulat mit Teilchendurchmessern von etwa 50 um wird
über eine Zellradschleuse 20 ausgetragen, wobei über den Anschluß
21 Abgase mit Temperaturen von etwa 200° C abgezogen
werden können. Das Mikrogranulat liegt überwiegend amorph bzw.
glasig vor. Aufgrund der überaus raschen Abkühlung wird beim
Versprühen von Metallschmelzen metallisches Glas, wie es beispielsweise
für die Herstellung von Supraleitern verwendet wird,
gebildet.The microgranules with particle diameters of about 50 µm
discharged via a
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT55099 | 1999-03-24 | ||
| AT0055099A AT407224B (en) | 1999-03-24 | 1999-03-24 | METHOD FOR GRANULATING AND CRUSHING LIQUID MELT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1038976A1 true EP1038976A1 (en) | 2000-09-27 |
| EP1038976B1 EP1038976B1 (en) | 2001-11-21 |
Family
ID=3493592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00890083A Expired - Lifetime EP1038976B1 (en) | 1999-03-24 | 2000-03-17 | Method of granulating and pulverizing slag or metal melts |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1038976B1 (en) |
| AT (1) | AT407224B (en) |
| DE (1) | DE50000083D1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT408956B (en) * | 2000-05-11 | 2002-04-25 | Tribovent Verfahrensentwicklg | DEVICE FOR GENERATING A HOT GAS FLOW |
| EP1229136A1 (en) * | 2001-01-25 | 2002-08-07 | Tribovent Verfahrensentwicklung GmbH | Process and device for granulating liquid slags |
| EP1234890A1 (en) * | 2001-02-27 | 2002-08-28 | Tribovent Verfahrensentwicklung GmbH | Device for atomising melts |
| EP1234889A1 (en) * | 2001-02-27 | 2002-08-28 | Tribovent Verfahrensentwicklung GmbH | Apparatus for granulating of liquid slag |
| EP1256633A2 (en) * | 2001-05-10 | 2002-11-13 | Tribovent Verfahrensentwicklung GmbH | Process and apparatus for granulating molten materials such as e.g. liquid slags |
| WO2002090282A1 (en) * | 2001-05-10 | 2002-11-14 | Tribovent Verfahrensentwicklung Gmbh | Device for granulating, pulverizing and comminuting liquid slag |
| EP1306450A1 (en) * | 2001-10-23 | 2003-05-02 | Tribovent Verfahrensentwicklung GmbH | Method and apparatus for granulating and pulverizing liquid melts |
| DE10205897A1 (en) * | 2002-02-13 | 2003-08-21 | Mepura Metallpulver | Process for the production of particulate material |
| EP1400602A2 (en) * | 2002-09-10 | 2004-03-24 | Tribovent Verfahrensentwicklung GmbH | Method and apparatus for the granulation of liquid melts |
| WO2004046401A1 (en) * | 2002-11-20 | 2004-06-03 | Patco Engineering Gmbh | Method for obtaining copper by spraying a melt containing a copper raw material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2533633A (en) * | 1946-04-01 | 1950-12-12 | Charles W Schott | Granulated slag and method for producing it |
| JPS54161596A (en) * | 1978-06-12 | 1979-12-21 | Sumitomo Metal Ind Ltd | Heat recovering method for molten slag |
| GB1584238A (en) * | 1977-10-13 | 1981-02-11 | Nakayama Steel Works Ltd | Method and apparatus for manufacturing crushed sand from melted slag from a ferrous blast furnace |
| DE3126709A1 (en) * | 1981-07-07 | 1983-01-27 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Process and apparatus for the recovery of industrial waste heat from the heat content of metallurgical slag |
| SU1052342A1 (en) * | 1982-07-05 | 1983-11-07 | Предприятие П/Я Г-4361 | Installation for producing metal pellets |
| WO1995015402A1 (en) * | 1993-12-03 | 1995-06-08 | 'holderbank' Financiere Glarus Ag | Process and device for granulating and crushing molten materials and grinding stocks |
| US5609919A (en) * | 1994-04-21 | 1997-03-11 | Altamat Inc. | Method for producing droplets |
| DE19632698A1 (en) * | 1996-08-14 | 1998-02-19 | Forschungsgemeinschaft Eisenhu | Fine grained slag sand production |
-
1999
- 1999-03-24 AT AT0055099A patent/AT407224B/en not_active IP Right Cessation
-
2000
- 2000-03-17 EP EP00890083A patent/EP1038976B1/en not_active Expired - Lifetime
- 2000-03-17 DE DE50000083T patent/DE50000083D1/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2533633A (en) * | 1946-04-01 | 1950-12-12 | Charles W Schott | Granulated slag and method for producing it |
| GB1584238A (en) * | 1977-10-13 | 1981-02-11 | Nakayama Steel Works Ltd | Method and apparatus for manufacturing crushed sand from melted slag from a ferrous blast furnace |
| JPS54161596A (en) * | 1978-06-12 | 1979-12-21 | Sumitomo Metal Ind Ltd | Heat recovering method for molten slag |
| DE3126709A1 (en) * | 1981-07-07 | 1983-01-27 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Process and apparatus for the recovery of industrial waste heat from the heat content of metallurgical slag |
| SU1052342A1 (en) * | 1982-07-05 | 1983-11-07 | Предприятие П/Я Г-4361 | Installation for producing metal pellets |
| WO1995015402A1 (en) * | 1993-12-03 | 1995-06-08 | 'holderbank' Financiere Glarus Ag | Process and device for granulating and crushing molten materials and grinding stocks |
| US5609919A (en) * | 1994-04-21 | 1997-03-11 | Altamat Inc. | Method for producing droplets |
| DE19632698A1 (en) * | 1996-08-14 | 1998-02-19 | Forschungsgemeinschaft Eisenhu | Fine grained slag sand production |
Non-Patent Citations (2)
| Title |
|---|
| DATABASE WPI Section Ch Week 198006, Derwent World Patents Index; Class M24, AN 1980-09981C, XP002141219 * |
| DATABASE WPI Section Ch Week 198427, Derwent World Patents Index; Class M22, AN 1984-170428, XP002141220 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT408956B (en) * | 2000-05-11 | 2002-04-25 | Tribovent Verfahrensentwicklg | DEVICE FOR GENERATING A HOT GAS FLOW |
| EP1229136A1 (en) * | 2001-01-25 | 2002-08-07 | Tribovent Verfahrensentwicklung GmbH | Process and device for granulating liquid slags |
| EP1234890A1 (en) * | 2001-02-27 | 2002-08-28 | Tribovent Verfahrensentwicklung GmbH | Device for atomising melts |
| EP1234889A1 (en) * | 2001-02-27 | 2002-08-28 | Tribovent Verfahrensentwicklung GmbH | Apparatus for granulating of liquid slag |
| EP1256633A2 (en) * | 2001-05-10 | 2002-11-13 | Tribovent Verfahrensentwicklung GmbH | Process and apparatus for granulating molten materials such as e.g. liquid slags |
| WO2002090282A1 (en) * | 2001-05-10 | 2002-11-14 | Tribovent Verfahrensentwicklung Gmbh | Device for granulating, pulverizing and comminuting liquid slag |
| EP1256633A3 (en) * | 2001-05-10 | 2003-10-22 | Tribovent Verfahrensentwicklung GmbH | Process and apparatus for granulating molten materials such as e.g. liquid slags |
| EP1306450A1 (en) * | 2001-10-23 | 2003-05-02 | Tribovent Verfahrensentwicklung GmbH | Method and apparatus for granulating and pulverizing liquid melts |
| DE10205897A1 (en) * | 2002-02-13 | 2003-08-21 | Mepura Metallpulver | Process for the production of particulate material |
| EP1400602A2 (en) * | 2002-09-10 | 2004-03-24 | Tribovent Verfahrensentwicklung GmbH | Method and apparatus for the granulation of liquid melts |
| EP1400602A3 (en) * | 2002-09-10 | 2004-07-21 | Tribovent Verfahrensentwicklung GmbH | Method and apparatus for the granulation of liquid melts |
| WO2004046401A1 (en) * | 2002-11-20 | 2004-06-03 | Patco Engineering Gmbh | Method for obtaining copper by spraying a melt containing a copper raw material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1038976B1 (en) | 2001-11-21 |
| AT407224B (en) | 2001-01-25 |
| ATA55099A (en) | 2000-06-15 |
| DE50000083D1 (en) | 2002-02-21 |
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