摘要:
The invention relates to a method and device for cooling the housing of a melting unit melting chamber. In the method, a liquid metal heat carrier is used to cool the upper portion of an airtight cavity, formed by a double-walled metal shell of the melting chamber housing, by means of inputting the liquid metal heat carrier into the cavity which encompasses a free space, a slag bath and the upper portion of a lined metal bath, while the lower portion of the airtight cavity, formed by the double-walled metal shell of the housing and separated from the upper portion thereof and encompassing the lower portion of the lined metal bath, is cooled only by means of a gaseous heat carrier which is inputted through pipe fittings situated on the lateral surface of an external wall of a heat-exchanger, heated gaseous heat carrier is removed from the heat-exchanger by means of pipe fittings situated on the lateral surface of the external wall of the heat-exchanger, and the temperature of the liquid metal heat carrier is maintained within certain limits by means of adjusting the flow rate of the cold gaseous heat carrier which passes through the heat-exchanger in accordance with readings of a device which sets the temperature of the liquid metal heat carrier. A device is disclosed for carrying out the method. Higher output and lower costs are achieved.
摘要:
The heat treatment method of the present invention includes: a first step of mist cooling a treatment object retained at a prescribed temperature by supplying mist-like coolant, to a target temperature near to and higher than a first transformation point at which a structure of the treatment object begins to be transformed into a prescribed structure; a second step, following the first step, of retaining the treatment object for a prescribed time in a state where supply of mist-like coolant is stopped; and a third step, following the second step, of cooling the treatment object to a temperature lower than or equal to the first transformation point. According to the present invention, it is possible to provide a heat treatment method capable of suppressing irregularity and deformation in the structure of the treatment object.
摘要:
The invention relates to a plant for thermal processing processes having a first processing section for heating a workpiece or a medium to be processed to a first process temperature, to a temperature matching section in which the workpiece or medium takes on a equalization temperature, and to a second processing section for bringing the workpiece or medium to a second process temperature, wherein the temperature matching section is clad at least predominantly with a material reflecting the heat radiation of the workpiece or medium, such that the workpiece or medium is substantially brought to or maintained at the equalization temperature by reflection of the heat radiation thereof.
摘要:
Runner (1) for guiding a flow of liquid metal and/or slag, comprising a refractory permanent lining (3,7) and, inside the latter, a refractory wear lining (10), in which runner the permanent lining is arranged inside an elongate trough-like steel casing (2), in which parallel runner ducts (4,5) through which a gaseous cooling medium is passed run through this permanent lining divided along the circumference and in the vicinity of the bottom and the walls of the steel casing, and in which the wear lining and the permanent lining are separated from one another by a deformable layer which is made from the group of materials comprising dry refractory ramming mixture (8) and refractory felt.
摘要:
[PROBLEMS] A method of sealing a glass panel assembly capable of properly removing impure gases or the like by a temperature control and a pressure control combined therewith in a sealing stage, and reducing the amounts of impure gases or the like remaining in the glass panel assembly after sealing; and a sealing furnace. [MEANS FOR SOLVING PROBLEMS] When sealing a glass panel assembly having a seal frit interposed between a pair of stacked glass substrates by fusing the seal frit, the interior atmosphere is forcibly fluidized to heat the glass panel assembly to a preliminary heating temperature T1 near the fusing start temperature of the seal frit by this interior atmosphere, then it is depressurized (P1) with the preliminary heating temperature kept unchanged, then the interior atmosphere is forcibly fluidized to heat the glass panel assembly from the preliminary heating temperature to a sealing temperature T2 by the interior atmosphere, and then the interior atmosphere is forcibly fluidized to cool the glass panel assembly by this interior atmosphere.
摘要:
The invention relates to a heat exchanger for cooling elongated metal products, such as threads or strips. The apparatus comprises a longitudinal passageway (2) with an upstream end and with a downstream end, a backflow line (8) connecting said upstream end and said downstream end, whereby forming a closed loop pipeline (2,8), a product inlet (3) and a product outlet (4) into said closed loop pipeline (2,8), and means (7) for introducing a cold medium into said closed loop pipeline (2,8). In a preferred embodiment, the cold medium is cryogenic gas, and the means for introducing it into the closed loop pipeline is an expansion nozzle, such as a laval nozzle.
摘要:
Purpose To provide a glass panel assembly sealing method and sealing process furnace used therewith wherein coordinated control of temperature and pressure enables the removal of impure gas and the like from the glass panel assembly and reduces the amount of residual impure gas and the liked remaining in the glass panel assembly after the sealing process is complete. Means A seal frit is applied between two mutually overlaid glass substrates comprising a glass panel assembly. The internal temperature of the glass panel assembly is raised, through a forcefully circulated environment, to a preliminary temperature T1 which is near the initial melting temperature of the seal frit. The pressure (P1) of the internal environment is then reduced while the preliminary temperature is maintained. The temperature is then increased from the preliminary temperature up to the sealing temperature T2 by the forcefully circulated environment, after which the glass panel assembly is cooled by the forceful circulated environment.
摘要:
A method capable of suppressing damages to furnace wall refractories in a melting furnace and making the working life of them longer and a technique capable of obtaining a molten iron with homogenized composition while keeping a high productivity upon arc heating a pre-reducing iron in a melting furnace to obtain a molten iron, the method comprising supplying a pre-reducing iron to a stationary non-tilting type melting furnace and melting the iron by an arc heating mainly composed of radiation heating, the melting being performed while keeping a refractory wearing index RF represented by the following equation at 400 MWV/m 2 or less. RF = P × E/L 2 [wherein RF represents the refractory wearing index (MWV/m 2 ); P represents an arc power for one phase (MW); E represents an arc voltage (V); and L represents the shortest distance between the electrode side surface of a tip within an arc heating furnace and a furnace wall inner surface (m).]
摘要:
Um eine Vorrichtung zum Einschmelzen von Metall mit einem Elektrolichtbogenofen (1), der ein Ofengefäß mit einem Deckel (5) umfasst, sowie mit Verfahrmitteln (39) für das Ofengefäß, dahingehend weiterzuentwickeln, dass ein energiesparendes Arbeiten mit kurzen Nebenzeiten durch Wartungs- bzw. Reparaturarbeiten bei hoher Wirtschaftlichkeit erreicht werden kann, soll das Ofengefäß in Modulbauweise einen, mit einer Feuerfest-Auskleidung (2) versehenen, Unterofen (3) als ein erstes Modul sowie einen davon trennbaren Oberofen (4) als ein zweites Modul umfassen und das Modul Unterofen (4) aus einer Einschmelz-Arbeitsstellung (I), in der er mit dem Oberofen (4) und dem Deckel (5) zu einem Gesamtmodulaufbau verbunden ist, horizontal in eine Stellung (II) zur Reparatur, insbesondere des Feuerfest-Materials, die nicht mehr dem Bereich des Oberofens (4) zugeordnet ist, mittels der Verfahrmittel (39) verfahrbar sein.