摘要:
Le revêtement incombustible de gazéificateurs de charbon pour la production de gaz réducteur se compose au moins en partie de pierres de magnésie non-calcinée contenant du carbone avec une teneur en carbone de 5 à 30 % en poids. Les composants de ces pierres de magnésie composés de magnésie frittée et/ou fondue ont de manière appropriée une teneur en Fe2O3 inférieure à 6 % en poids, de préférence à 1,5 % en poids, et une teneur en SiO2 inférieure à 3 % en poids, de préférence à 1 % en poids.
摘要:
Heiße Eisenschwammpartikel werden aus einem Direktreduktionsschactofen (2) durch Schneckenförderer (17) über Verbindungsleitungen (19) direkt in einen Einschmelzvergaser (1) gefördert und ein sich über diesen direkten Weg ausbildender Gasstrom (24) von Einschmelzvergaser (1) in den Direktreduktionsschachtofen (2) nach Kühlung auf unterhalb 950°C auf maximal 30 Vol.-% der dem Direktreduktionsschachtofen (2) insgesamt zugeführten Reduktionsgasmenge begrenzt.
摘要:
Metallurgisches Schmelzaggregat mit einer schwenkbaren Düse bzw. einem schwenkbaren Brenner aus wenigstens einem Rohr. Das Kopfteil (12) der Düse (3) ist kalottenförmig ausgebildet und die Kalotte (13) zwischen zwei Ringsitzen (14 und 15) eingespannt (Fig.).
摘要:
The invention relates to a shaft furnace (1), especially a direct reduction shaft furnace, with a fill (2) of bulk material, especially bulk material containing iron oxide and/or sponge iron, discharge devices (4) for the bulk material arranged above the floor area (3) of the shaft furnace (1), as well as inlet openings (6) for a reducing gas which are positioned above the discharge devices (4). Devices (7) for moving the material contained in the shaft furnace (1) are arranged between the area formed by the inlet openings (6) and the area formed by the discharge device (4).
摘要:
In a process for returning finely dispersed solids discharged from a reactor vessel (1) with a carrier gas through a discharge point (2) of the reactor vessel (1) to a return point (15) of the reactor vessel (1), the solids are separated in a solid separator (4), in particular a cyclone separator, then returned with a carrier gas to the reactor vessel (1) while a differential pressure is maintained between the solid separator (4) and the return point (15). When the solids enter the reactor vessel (1), they are at least partially gasified and/or burned with oxygen supplied for that purpose. To enable the solids to be returned without moving parts which would be exposed to abrasion, in a continuous and controlled manner, the separated solids are directly and continuously aspirated by the solid separator (4) by means of a propellant gas and by an injector effect, accelerated and supplied to the reactor vessel (1).
摘要:
In a process for returning finely dispersed solids discharged from a reactor vessel (1) with a carrier gas through a discharge point (2) of the reactor vessel (1) to a return point (15) of the reactor vessel (1), the solids are separated in a solid separator (4), in particular a cyclone separator, then returned with a carrier gas to the reactor vessel (1) while a differential pressure is maintained between the solid separator (4) and the return point (15). When the solids enter the reactor vessel (1), they are at least partially gasified and/or burned with oxygen supplied for that purpose. To enable the solids to be returned without moving parts which would be exposed to abrasion, in a continuous and controlled manner, the separated solids are directly and continuously aspirated by the solid separator (4) by means of a propellant gas and by an injector effect, accelerated and supplied to the reactor vessel (1).
摘要:
The invention relates to a method of returning a finely-divided solid (4) extracted at an extraction point of a reactor vessel (1) from said vessel using a gas to a feed-back point (16) of said vessel. The solid (4) is separated in a solid separator (3), subsequently collected in a collector (8) and fed back from said collector to the reactor vessel (1) using a feed gas. To improve operation of the solid separator (3) without extra loading of the reactor vessel (1), an additional gas flow (23) which is independent of the gas flow in the reactor vessel is circulated through the solid separator (3) in the direction of flow of the solid (4).