Abstract:
A rotating vacuum kiln (1) and method for heat treating solid particulate material under vacuum conditions uses a rotating refractory metal cylindrical vessel (2) with a cool inlet zone (3), hot intermediate zone (6), and cool exit zone (7), with a first series of inner radiation shields (25) provided at the hot intermediate zone adjacent the cool inlet zone (5) and a second series of inner radiation shields (29) provided at the hot intermediate zone (6) adjacent the cool exit zone (7) to protect those two zones from the high temperatures in the hot intermediate zone. Heat for the hot intermediate zone of the cylindrical vessel is provided indirectly by electrical resistance heaters (35) that surround the vessel and outer radiation shields (37, 38) are provided about the heaters to direct heat to the cylindrical vessel.
Abstract:
Provided are an apparatus for manufacturing molten steel and a method for manufacturing molten steel using same. The apparatus for manufacturing molten steel includes a rotary kiln configured to reduce iron ore to form reduced iron, and an electric furnace receiving the reduced iron manufactured in the rotary kiln in order to manufacture the molten steel. The rotary kiln includes a body part into which the iron ore is moved and a in which the iron ore is reduced. A loading hole through which raw material and fuel are loaded, and a gas discharge hole for discharging gas, are defined in one side of the body part; and a discharge hole for discharging the reduced iron, and a combustion part in which pulverized coal injection and combustion are performed, are disposed in the other side of the body part. Also, the body part has a plurality of air inflow holes through which air is introduced.
Abstract:
The modular plant, comprised of at least one basic module, is suitable for converting carbonaceous matrices (6) into fuel or other useful products with no adverse environmental impact. The modular plant includes a rotary reactor (9) equipped with a rotating drive mechanism (22) and a fixed stationary body (1). The inclination of the reactor (9) with rotating central longitudinal axis can be varied from 0° to 45° with respect to a horizontal plane. The reactor is comprised of a central body, substantially a cylinder closed at the first one end, the entry end, with a stationary fixed head (8) and at the other, the exit end, with a head fixed to the rotary reactor (9). The inlet end (8) contains two conduits, one (7) for the introduction of the carbonaceous matrix (6) into the rotary reactor and the other inlet (5) for the introducing of thermally conductive carriers (4). The rotary reactor (9) is devoid of internal components which provide rotation motion relative to the cylindrical body. The fixed housing body (1) enclosing the rotary reactor (9) seals the reactor and maintains the integrity of the reactor atmosphere with respect to the external ambient atmosphere. The housing has openings for the passage of the first and second inlets, as well as an exit for the converted carbonaceous matrix (17, 19) and the thermally conductive carrier (4).
Abstract:
The invention concerns a method for preparing a blend consisting of power station ashes and/or slugs, and/or coal wastes in a quantity of 60-95% by weight, as well as an agglomeration promoting binder, including sewage after-fermentation sludge in a quantity of 5-40% in the dry state, said blend being so prepared that its total moisture contents is below 21%, and while maintaining features of a pourable material it can be homogenized in mixers provided with high speed rotary homogenizing means. After agglomerating said blend is fired in a rotary furnace. A firing method is characterized by that the rotary furnace operates with charge and gas phase moving in the co-current arrangement, what enables almost autothermal process with firing in the same time harmful volatile substances released from a binder. Said autothermal process is also promoted by the double-diameter structure of the furnace (a wider part 1A and a narrow par 1B ), by its substantial slope, precise insulated heads 2 and 7 , as well as gas ducts 3 and 14 , and by dividing thee air stream, one part of which is directly supplied through the layer of the material being fired and sintered.
Abstract:
Procédé de fabrication de clinker de ciment mis en œuvre dans une installation de production continue (1), présentant au moins une zone de combustion (2, 2') d'un combustible pour la cuisson d'une matière crue minérale, dans lequel on transforme la matière crue en clinker par cuisson, obtenant du clinker chaud (3), puis on refroidit le clinker chaud (3) en deux étapes successives, une première étape de refroidissement étant mise en œuvre dans un premier refroidisseur (4), et une deuxième étape de refroidissement étant mise en œuvre dans un deuxième refroidisseur (5), Selon l'invention, on réalise la première étape de refroidissement, de manière continue, par soufflage d'un gaz oxygéné (6) sur le clinker chaud, obtenant du clinker partiellement refroidi, et on achemine la totalité du gaz oxygéné réchauffé (7), engendré par le premier refroidisseur (4), vers ladite au moins une zone de combustion (2,2') de ladite installation pour être utilisé comme gaz de combustion en ajustant la quantité de gaz oxygéné soufflé au premier refroidisseur de telle façon à couvrir sans excès les besoins en gaz de combustion de ladite installation, - on stocke le clinker partiellement (31) refroidi dans une enceinte de stockage du deuxième refroidisseur (5) ou encore une enceinte de stockage associée à ce deuxième refroidisseur, et on commande par intermittence la deuxième étape de refroidissement sur le clinker partiellement refroidi.
Abstract:
The present invention relates to a method for calcining electrode materials using a rotary kiln including: a heat treatment unit having a cylindrical kiln body; a feeding unit for feeding materials to be treated into the Kiln body; and a discharge unit for discharging the materials to be treated from the kiln body. The method for calcining electrode materials comprises: feeding particles of electrode material into the upper portion of the kiln body; calcining the particles of electrode material while moving the latter from the upper portion to the lower portion of the kiln body by means of positive-pressure gases flowing through the inside of the kiln body; and discharging the calcined particles of electrode material through the lower portion of the kiln body.