Abstract:
Apparatus for mounting in or on a furnace comprises fluid circulation means defining a fluid circulation path, having first and second path portions adapted, in use, to lie towards the exterior and interior of the furnace respectively.
Abstract:
This invention relates to a method of preventing, during the melt-reduction of Cr ore or iron ore, the scatter loss of the ore and coal at the time of charging. In the present invention, the ore and coal are charged down into a furnace from a shoot extended near a furnace port or connected to a furnace body. The ore and coal are charged down into the furnace while a gas is jetted outward of the shoot form nozzles disposed in the circumferential direction inside and near the tip of the shoot so that the raw materials can be charged more effectively while reducing the scatter loss.
Abstract:
Provided is an oven that includes an oven chamber through which a product passes to be treated. An oven wall defines apertures through which the product passes to repeatedly enter and exit the oven chamber during treatment. A vestibule chamber is disposed adjacent to the oven wall and encloses a return air duct that draws in ambient air entering the vestibule chamber and the process gas entering the vestibule chamber from the oven chamber through at least one of the apertures in the oven wall. A nozzle is provided externally of the vestibule chamber and oven chamber in fluid communication with the return air duct. The nozzle receives gas drawn in by the return air duct and directs the combination generally toward at least one aperture formed in the vestibule chamber through which ambient air can enter the vestibule chamber to form an air curtain adjacent to the at least one aperture.
Abstract:
Vertical annealing furnace for the continuous bright annealing of metal strip (10) guided through the furnace, comprising a vertically disposed muffle (16) having a strip entry side and a strip exit side, as well as heating means for externally heating the muffle, the muffle (16) having the freedom to expand in the longitudinal direction. The muffle (16) is disposed such that the strip entry side is situated at the top side and the strip exit side is situated at the underside, the underside of the muffle (16) is delimited downwards in the longitudinal direction and the muffle (16) can expand upwards in the longitudinal direction. The vertical annealing furnace is particularly intended to be used in a heating section (2) of a strip treatment device further comprising a strip feed section (1), a cooling section (3) situated downstream of the heating section (2) and a strip removal section (4).
Abstract:
The proposed oven for the production of porous ceramic redoxide for biological filters comprises a foundation (1); a station (2) for introducing charges of granules; and a heavy-duty metal housing (3) with a refractory lining (4), a working channel (5) being defined by the partitions (6), crown (7) and hearth (8). In the sequence of the processing, the said working channel comprises: inner zones for preliminary (9) and high-temperature heating, cooling zones, heat conductors (15), technical systems (29, 30, 31), an automation system (32), and a station where the finished product (14) is removed. The high-temperature heating zone includes roasting and isothermal hardening areas (10 and 11 respectively), while the cooling area is divided into controlled and active cooling areas (12 and 13 respectively). The heat conductors (15) are arranged in pairs in, on or near the partitions in the preliminary heating zone (9), roasting zone (10) and isothermal hardening zone (11). Devices are provided at the entrance to the controlled cooling zone for air screens (27). A device for aerohydraulic screens (28) is provided between the exit from the controlled cooling zone (12) and the entrance to the active cooling zone (13).
Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum im Durchlauf erfolgenden Behandeln eines Stahlflachprodukts (S). Die erfindungsgemäße Vorrichtung umfasst dabei eine indirekt beheizte Glühofenkammer (1), eine Fördereinrichtung zum kontinuierlichen Fördern des Stahlflachprodukts (S) über einen von einem Eingang (5) der Glühofenkammer (1) zu einem Ausgang (6) der Glühofenkammer (1) führenden Förderweg (4) und eine Düsenanordnung (D1,D2) zum Einspeisen von in Bezug auf das Stahlflachprodukt (S) reaktivem Atmosphären-Gas in die Glühofenkammer (1). Um auf besonders wirtschaftliche, betriebsichere Weise eine gezielte, im Durchlauf erfolgende Behandlung des jeweiligen Stahlflachprodukts durchzuführen, sieht die Erfindung vor, dass eine erste Düsenanordnung (D1), aus der während der Behandlung ein Gasstrahl (G) austritt, der eine in Richtung des Eingangs (5) der Glühofenkammer (1) gerichtete, die Oberfläche des zu behandelnden Stahlflachprodukts (S) überstreichende erste Gasströmung (G1) bewirkt, und eine zweite Düsenanordnung (D2) vorgesehen sind, aus der während der Behandlung ein Gasstrahl (G) austritt, der eine in Richtung des Ausgangs (6) der Glühofenkammer (1) gerichtete, die Oberfläche des zu behandelnden Stahlflachprodukts (S) überstreichende zweite Gasströmung (G2) bewirkt.
Abstract:
Gasabschluss für die Materialeingangs- (10') und die Materialausgangsöffnungen (10*) von Reaktoren (1) zum Behandeln von Materialsträngen (17) und Materialbahnen (7). Das Abdichten der Öffnungen (10) geschieht durch Gasvorhänge. Diese werden durch Gasströme, die schräg in das Ofeninnere (15) gerichtet sind und aus Gasaustrittsöffnungen (13) oder Düsen (13) austreten, erzeugt. Nach der Erfindung sind im Anschluss an die Gasaustrittsöffnungen (13) Gasleitkörper (11), die sich neben den Materialsträngen (7) oder Materialbahnen (7) im wesentlichen parallel zu den Oberflächen dieser Materialstränge (7) und Materialbahnen (7) in Richtung des Reaktorinneren (15) erstrecken, angebracht. Die aus den Gasaustrittsöffnungen (13) austretenden Gase werden in den Gasleiträumen (14), die zwischen den Gasleitkörpern (11) und den Materialsträngen (7) oder -bahnen (7) entstanden sind, gezielt und unter leicht erhöhtem Druck in Richtung des Reaktorinnenraumes (15) geleitet und bewirken so einen wesentlich verbesserten Gasabschluss.
Abstract:
The invention relates to an aerodynamic seal in which two separate slit nozzles (13, 14; 15, 16) are assigned to each side of the metal strip (3) which is fed into the facility. Said slit nozzles are arranged successively at a distance from one another in the direction of passage of the metal band (3) and generate a gas jet which impinges the metal band (3) in a perpendicular direction. They can also be arranged so that they face away from one another and impinge the metal band (3) at an angle. The slit nozzles (14, 16) facing the protective gas atmosphere are supplied with air and the slit nozzles (13, 15) facing the continuous thermal treatment facility are supplied with protective gas. The seals are suitable for continuous thermal treatment facilities and other facilities in which two gas zones should be sealed from one another by means other than a mechanical seal.
Abstract:
A seal for a high temperature treatment vessel, particularly those common to the steel industry, has a primary purpose to prevent gases from escaping the treatment vessel. The seal is provided by a positive gas pressure curtain barrier means, a plurality of mechanical seal and a means of aspirating gases escaping past the seals for recycling into the vessel.