Fluidized bed method and plant for the heat treatment of solids containing titanium

The present invention relates to a method and a plant for the heat treatment of solids containing titanium and possibly further metal oxides, in which fine-grained solids are heated to a temperature of 700 to 950° C. in a fluidized bed reactor ( 1 ). To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a gas supply tube ( 3 ) into a mixing chamber ( 7 ) of the reactor ( 1 ), the gas supply tube ( 3 ) being at least partly surrounded by a stationary annular fluidized bed ( 10 ) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed ( 10 ) are adjusted such that the particle Froude numbers in the gas supply tube ( 3 ) are between 1 and 100, in the annular fluidized bed ( 10 ) between 0.02 and 2 and in the mixing chamber ( 7 ) between 0.3 and 30.

FLUIDIZED BED METHOD FOR THE HEAT TREATMENT OF SOLIDS CONTAINING TITANIUM

A plant for the heat treatment of solids containing titanium includes a fluidized bed reactor. The reactor includes at least one gas supply tube being at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being located above the upper orifice region of the gas supply tube. The gas flowing through the gas supply tube entrains solids from the stationary annular fluidized bed into the mixing chamber when passing through the upper orifice region of the gas supply system. The plant further includes a solids separator downstream of the reactor. The solids separator includes a solids conduit leading to the annular fluidized bed of the reactor.

Method and apparatus for heat treatment in a fluidized bed

The present invention relates to a method for the heat treatment of fine-grained solids, in particular gypsum, in which the solids are heated to a temperature of 50 to 1000° C. in a fluidized bed reactor (1), and to a corresponding plant. To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a preferably central gas supply tube (3) into a mixing chamber (21) of the reactor (1), the gas supply tube (3) being at least partly surrounded by a stationary annular fluidized bed (2) which is fluidized by supplying fluidizing gas, and to adjust the gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed (2) such that the particle Froude numbers in the gas supply tube (3) are between 1 and 100, in the annular fluidized bed (2) between 0.02 and 2 and in the mixing chamber (21) between 0.3 and 30.

Plant for the heat treatment of solids containing titanium

A plant for the heat treatment of solids containing titanium includes a fluidized bed reactor. The reactor includes at least one gas supply tube being at least partly surrounded by an annular chamber in which a stationary annular fluidized bed is located, and a mixing chamber being located above the upper orifice region of the gas supply tube. The gas flowing through the gas supply tube entrains solids from the stationary annular fluidized bed into the mixing chamber when passing through the upper orifice region of the gas supply system. The plant further includes a solids separator downstream of the reactor. The solids separator includes a solids conduit leading to the annular fluidized bed of the reactor.

Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed reactor

The present invention relates to a method and a plant for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of 700 to 1150° C. in a fluidized bed reactor ( 8 ). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below through at least one gas supply tube ( 9 ) into a mixing chamber region ( 15 ) of the reactor ( 8 ), the gas supply tube ( 9 ) being at least partly surrounded by a stationary annular fluidized bed ( 12 ) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed ( 12 ) are adjusted such that the Particle-Froude-Numbers in the gas supply tube ( 9 ) are between 1 and 100, in the annular fluidized bed ( 12 ) between 0.02 and 2, and in the mixing chamber ( 15 ) between 0.3 and 30.

Method and plant for the heat treatment of solids containing iron oxide

A plant for the heat treatment of solids containing iron oxide. The plant includes a reactor including a fluidized bed reactor. The reactor includes a gas supply system disposed in the reactor, a stationary annular fluidized bed which at least partly surrounds the gas supply system, and a mixing chamber. The gas supply system is configured so that gas flowing through the gas supply system entrains solids from the stationary annular fluidized bed into the mixing chamber.

Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed reactor

The present invention relates to a method and a plant for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of 700 to 1150° C. in a fluidized bed reactor ( 8 ). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below through at least one gas supply tube ( 9 ) into a mixing chamber region ( 15 ) of the reactor ( 8 ), the gas supply tube ( 9 ) being at least partly surrounded by a stationary annular fluidized bed ( 12 ) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed ( 12 ) are adjusted such that the Particle-Froude-Numbers in the gas supply tube ( 9 ) are between 1 and 100, in the annular fluidized bed ( 12 ) between 0.02 and 2, and in the mixing chamber ( 15 ) between 0.3 and 30.

Process and plant for reducing solids containing iron oxide

This invention relates to a process for reducing solids containing iron oxide, such as iron ore, in which fine-grained solids are heated and at least partly calcined in a pre-heating stage (2, 9). In a first fluidized-bed reactor (14) downstream of the preheating stage (2, 9), the solids are prereduced and reduced further in a second fluidized-bed reactor (16). Downstream of the second reactor (16) a briquetting stage (20) is provided, in which the solids are briquetted at a temperature above 500° C. To increase the energy efficiency of the process and improve the flowability of the solids in the briquetting stage (20), magnesite is added to the preheating stage (2, 9) together with the solids containing iron oxide, which magnesite is at least partly calcined in the preheating stage (2, 9) to obtain magnesium oxide. Furthermore, the invention relates to a corresponding plant.

Fluidized bed method and plant for the heat treatment of solids containing titanium

The present invention relates to a method and a plant for the heat treatment of solids containing titanium and possibly further metal oxides, in which fine-grained solids are heated to a temperature of 700 to 950° C. in a fluidized bed reactor ( 1 ). To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a gas supply tube ( 3 ) into a mixing chamber ( 7 ) of the reactor ( 1 ), the gas supply tube ( 3 ) being at least partly surrounded by a stationary annular fluidized bed ( 10 ) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed ( 10 ) are adjusted such that the particle Froude numbers in the gas supply tube ( 3 ) are between 1 and 100, in the annular fluidized bed ( 10 ) between 0.02 and 2 and in the mixing chamber ( 7 ) between 0.3 and 30.

METHOD AND PLANT FOR THE HEAT TREATMENT OF SOLIDS CONTAINING IRON OXIDE

A plant for the heat treatment of solids containing iron oxide. The plant includes a reactor including a fluidized bed reactor. The reactor includes a gas supply system disposed in the reactor, a stationary annular fluidized bed which at least partly surrounds the gas supply system, and a mixing chamber. The gas supply system is configured so that gas flowing through the gas supply system entrains solids from the stationary annular fluidized bed into the mixing chamber.

Method and apparatus for heat treatment in a fluidized bed

The present invention relates to a method for the heat treatment of fine-grained solids, in particular gypsum, in which the solids are heated to a temperature of 50 to 1000° C. in a fluidized bed reactor ( 1 ), and to a corresponding plant. To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a preferably central gas supply tube ( 3 ) into a mixing chamber ( 21 ) of the reactor ( 1 ), the gas supply tube ( 3 ) being at least partly surrounded by a stationary annular fluidized bed ( 2 ) which is fluidized by supplying fluidizing gas, and to adjust the gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed ( 2 ) such that the particle Froude numbers in the gas supply tube ( 3 ) are between 1 and 100, in the annular fluidized bed ( 2 ) between 0.02 and 2 and in the mixing chamber ( 21 ) between 0.3 and 30.

Process and plant for the heat treatment of titanium-containing solids

Verfahren zur Wärmebehandlung von titanhaltigen Feststoffen, bei dem feinkörnige Feststoffe in einem Reaktor (1) mit Wirbelbett bei einer Temperatur von 700 bis etwa 950°C behandelt werden, dadurch gekennzeichnet, dass ein erstes Gas oder Gasgemisch von unten durch wenigstens ein vorzugsweise zentrales Gaszufuhrrohr (3) in eine Wirbelmischkammer (7) des Reaktors (1) eingeführt wird, wobei das Gaszufuhrrohr (3) wenigstens teilweise von einer durch Zufuhr von Fluidisierungsgas fluidisierten, stationären Ringwirbelschicht (10) umgeben wird, und dass die Gasgeschwindigkeiten des ersten Gases oder Gasgemisches sowie des Fluidisierungsgases für die Ringwirbelschicht (10) derart eingestellt werden, dass die Partikel-Froude-Zahlen in dem Gaszufuhrrohr (3) zwischen 1 und 100, in der Ringwirbelschicht (10) zwischen 0,02 und 2 sowie in der Wirbelmischkammer (7) zwischen 0,3 und 30 betragen. method for heat treatment of titanium-containing solids, in which fine-grained solids in a reactor (1) treated with fluidized bed at a temperature of 700 to about 950 ° C be characterized in that a first gas or gas mixture from below through at least one preferably central gas supply pipe (3) is introduced into a mixing chamber (7) of the reactor (1), wherein the gas supply pipe (3) at least partially by a Supply of fluidizing gas fluidized, stationary annular fluidized bed (10) is surrounded, and that the gas velocities of the first Gas or gas mixture and the fluidizing gas for the annular fluidized bed (10) be set so that the particle Froude numbers in the gas supply pipe (3) between 1 and 100, in the annular fluidized bed (10) between 0.02 and 2 and in the mixing chamber (7) between 0.3 and 30.

Process and plant for the heat treatment of fine-grained solids

Die vorliegende Erfindung betrifft ein Verfahren zur Wärmebehandlung von feinkörnigen Feststoffen, insbesondere Gips, bei dem die Feststoffe in einem Reaktor (1) mit Wirbelschicht auf eine Temperatur von 150 bis 1000 DEG C erhitzt werden, sowie eine entsprechende Anlage. Um die Energieausnutzung zu verbessern, wird vorgeschlagen, ein erstes Gas oder Gasgemisch von unten durch ein vorzugsweise zentrales Gaszufuhrrohr (3) in eine Wirbelmischkammer (21) des Reaktors (1) einzuführen, wobei das Gaszufuhrrohr (3) wenigstens teilweise von einer durch Zufuhr von Fluidisierungsgas fluidisierten, stationären Ringwirbelschicht (2) umgeben wird, und die Gasgeschwindigkeiten des ersten Gases oder Gasgemisches sowie des Fluidisierungsgases für die Ringwirbelschicht (2) derart einzustellen, dass die Partikel-Froude-Zahlen in dem Gaszufuhrrohr (3) zwischen 1 und 100, in der Ringwirbelschicht (2) zwischen 0,02 und 2 sowie in der Wirbelmischkammer (21) zwischen 0,3 und 30 betragen. The present invention relates to a process for the heat treatment of fine-grained solids, in particular gypsum, in which the solids are heated to a temperature of 150 to 1000 ° C. in a reactor (1) with a fluidized bed, and a corresponding installation. In order to improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a preferably central gas feed pipe (3) into a vortex mixing chamber (21) of the reactor (1), the gas feed pipe (3) being at least partially supplied by Fluidizing gas is surrounded by a fluidized, stationary annular fluidized bed (2), and the gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed (2) are set such that the particle Froude numbers in the gas supply pipe (3) are between 1 and 100, in the annular fluidized bed (2) between 0.02 and 2 and in the vortex mixing chamber (21) between 0.3 and 30.

Process and plant for the heat treatment of iron oxide-containing solids

Verfahren zur Wärmebehandlung von eisenoxidhaltigen Feststoffen, bei dem feinkörnige Feststoffe in einem Reaktor (8) mit Wirbelbett auf eine Temperatur von 700 bis 1.150°C erhitzt werden, dadurch gekennzeichnet, dass ein erstes Gas oder Gasgemisch von unten durch wenigstens ein Gaszufuhrrohr (9) in einen Wirbelmischkammerbereich (15) des Reaktors (8) eingeführt wird, wobei das Gaszufuhrrohr (9) wenigstens teilweise von einer durch Zufuhr von Fluidisierungsgas fluidisierten, stationären Ringwirbelschicht (12) umgeben wird, und dass die Gasgeschwindigkeiten des ersten Gases oder Gasgemisches sowie des Fluidisierungsgases für die Ringwirbelschicht (12) derart eingestellt werden, dass die Partikel-Froude-Zahlen in dem Gaszufuhrrohr (9) zwischen 1 und 100, in der Ringwirbelschicht (12) zwischen 0,02 und 2 sowie in der Wirbelmischkammer (15) zwischen 0,3 und 30 betragen. Process for the heat treatment of iron oxide-containing solids, in which fine-grained solids are heated in a reactor (8) with fluidized bed to a temperature of 700 to 1150 ° C, characterized in that a first gas or gas mixture from below through at least one gas supply pipe (9) in a vortex mixing chamber portion (15) of the reactor (8) is introduced, wherein the gas supply pipe (9) is at least partially surrounded by a fluidized by supplying fluidizing gas, stationary annular fluidized bed (12), and that the gas velocities of the first gas or gas mixture and the fluidizing gas for the annular fluidized bed (12) are adjusted so that the particle Froude numbers in the gas supply pipe (9) between 1 and 100, in the annular fluidized bed (12) between 0.02 and 2 and in the mixing chamber (15) between 0.3 and 30.

fluidized bed method and installation for the heat treatment of titanium-containing solids.

Process and plant for the heat treatment of solids containing titanium

This invention relates to a process and a plant for the heat treatment of solids contain­ing titanium. For this purpose, the fine-grained solids are heated to a temperature of 700 to 1000 °C in a reactor (4) with circulating fluidized bed and are partly discharged from the reactor (4) together with waste gases into a downstream separator (9). In the same, the solids are separated from the waste gases and are recirculated to the reactor (4) at least partly and/or phase by phase. Downstream of the reactor (4) and/or the separator (9) an injection cooler (13) is provided, in which the solids are cooled to below 250 °C by injecting a coolant. Downstream of the injection cooler (13) a fluidized-bed cooler (16) can be provided for the further cooling of the solids.

Fluidized bed method and plant for the heat treatment of solids containing titanium

The present invention relates to a method and a plant for the heat treatment of solids containing titanium and possibly further metal oxides, in which fine-grained solids are heated to a temperature of 700 to 950 ~C in a fluidized bed reactor (1). To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a gas supply tube (3) into a mixing chamber (7) of the reactor (1), the gas supply tube (3) being at least partly surrounded by a stationary annular fluidized bed (10) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed (10) are adjusted such that the particle Froude numbers in the gas supply tube (3) are between 1 and 100, in the annular fluidized bed (10) between 0.02 and 2 and in the mixing chamber (7) between 0.3 and 30.

Process and plant for reducing solids containing iron oxide

This invention relates to a process for reducing solids containing iron oxide, such as iron ore, in which fine-grained solids are heated and at least partly calcined in a pre heating stage (2, 9). In a first fluidized-bed reactor (14) downstream of the preheating stage (2, 9), the solids are prereduced and reduced further in a second fluidized-bed reactor (16). Downstream of the second reactor (16) a briquetting stage (20) is pro vided, in which the solids are briquetted at a temperature above 500~C To increase the energy efficiency of the process and improve the flowability of the solids in the briquetting stage (20), magnesite is added to the preheating stage (2, 9) together with the solids containing iron oxide, which magnesite is at least partly calcined in the preheating stage (2, 9) to obtain magnesium oxide. Furthermore, the invention relates to a corresponding plant.

Process and plant for the heat treatment of solids containing titanium

This invention relates to a process and a plant for the heat treatment of solids contain~ing titanium. For this purpose, the fine-grained solids are heated to a temperature of 700 to 1000 ~C in a reactor (4) with circulating fluidized bed and are partly discharged from the reactor (4) together with waste gases into a downstream separator (9). In the same, the solids are separated from the waste gases and are recirculated to the reactor (4) at least partly and/or phase by phase. Downstream of the reactor (4) and/or the separator (9) an injection cooler (13) is provided, in which the solids are cooled to below 250 ~C by injecting a coolant. Downstream of the injection cooler (13) a fluidized-bed cooler (16) can be provided for the further cooling of the solids.

Process and apparatus of fluidized reactor for heat treatment of solids containing titanium.

Foreliggende oppfinnelse angår en fremgangsmåte og et anlegg for varmebehandling av tørrstoff som inneholder titan og eventuelt ytterligere metalloksider, i hvilken finkomet tørrstoff varmes til en temperatur som ligger mellom 700ºC og 950ºC i en reaktor med fluidisert bed (1). For å forbedre energiutnyttelsen foreslås det å introdusere en første gass eller gassblanding fra undersiden gjennom et gasstilførselsrør (3) inn i et blandekammer (7) i reaktoren (1), hvilket gassforsyningsrør (3) i det minste tildels er omgitt av et stasjonært ringformet fluidisert bed (10) som fluidiseres ved å tilføre fluidiseringsgass. Gasshastighetene til den første gassen eller gassblandingen så vel som fluidiseringsgassen for det ringformede fluidiserte bedet (10) justeres slik at partikkel-Froudetallene i gasstilførselsrøret (3) er mellom 1 og 100, i det ringformede fluidiserte bedet (10) mellom 0,02 og 2 og i blandekammeret (7) mellom 0,3 og 30. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process and a plant for the heat treatment of solids containing titanium and, optionally, additional metal oxides, in which fine-grained solids are heated to a temperature between 700 ° C and 950 ° C in a fluidized bed reactor (1). To improve energy utilization, it is proposed to introduce a first gas or gas mixture from the underside through a gas supply pipe (3) into a mixing chamber (7) in the reactor (1), which gas supply pipe (3) is at least partially surrounded by a stationary annular fluidized bed (10) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture as well as the fluidization gas of the annular fluidized bed (10) are adjusted so that the particle Froud numbers in the gas supply tube (3) are between 1 and 100, in the annular fluidized bed (10) between 0.02 and 2. and in the mixing chamber (7) between 0.3 and 30.

Method and apparatus for heat treatment in a fluidised bed

The present invention relates to a method for the heat treatment of fine-grained solids, in particular gypsum, in which the solids are heated to a temperature of 50 to 1000 °C in a fluidized bed reactor (1), and to a corresponding plant. To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a preferably central gas supply tube (3) into a mixing chamber (21) of the reactor (1), the gas supply tube (3) being at least partly surrounded by a stationary annular fluidized bed (2) which is fluidized by supplying fluidizing gas, and to adjust the gas velocities of the first gas or gas mixture as well as of the fluidizing gas for the annular fluidized bed (2) such that the particle Froude numbers in the gas supply tube (3) are between 1 and 100, in the annular fluidized bed (2) between 0.02 and 2 and in the mixing chamber (21) between 0.3 and 30.

Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed reactor

Fluidized bed method and plant for the heat treatment of solids containing titanium

The present invention relates to a method and a plant for the heat treatment of solids containing titanium and possibly further metal oxides, in which fi ne- grained solids are heated to a temperature of 700 to 950 ~C in a fluidized b ed reactor (1). To improve the energy utilization, it is proposed to introduce a first gas or gas mixture from below through a gas supply tube (3) into a mixing chamber (7) of the reactor (1), the gas supply tube (3) being at leas t partly surrounded by a stationary annular fluidized bed (10) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas o r gas mixture as well as of the fluidizing gas for the annular fluidized bed (10) are adjusted such that the particle Froude numbers in the gas supply tu be (3) are between 1 and 100, in the annular fluidized bed (10) between 0.02 an d 2 and in the mixing chamber (7) between 0.3 and 30.