Abstract:
Une installation de carbonitruration (IC) comprend une chambre de chauffage (CC), pour chauffer au moins une pièce en acier (PA) à une première température, sous un gaz neutre et une pression choisie, une première chambre d'enrichissement (CE1) pour enrichir en azote la pièce chauffée, par nitruration en phase α sous une deuxième température inférieure ou égale à la première température, une seconde chambre d'enrichissement (CE2) pour enrichir en carbone la pièce enrichie en azote, par cémentation sous une troisième température supérieure à la deuxième température, une chambre de trempe (CT) pour tremper sous pression la pièce enrichie en azote et en carbone, un sas de transfert (ST) communiquant avec les chambres et propre à accueillir temporairement la pièce dans une atmosphère contrôlée, et des moyens de transfert (MT) pour transférer la pièce d'une chambre à une autre chambre via le sas de transfert (ST).
Abstract:
Bei einer Chargiervorrichtung (1) mit der, sperrige Teile enthaltendes Chargiergut aus einem Schacht (2) durch eine Austrittsöffnung (11) im unteren Bereich einer Schachtwand (4) mittels eines Schiebers (13) schubweise in ein Schmelzgefäß (31) gefördert werden kann, wird bei einer sich anbahnenden Blockierung durch sperrige Teile abhängig von der Vorschubkraft des Schiebers (13) ein oberes Begrenzungsteil (26) der Austrittsöffnung (11) angehoben.
Abstract:
The aim of the invention is to create a pre-heating device which has an overall simple structural shape, which is provided for pre-heating feed materials, especially scrap metal, and which is used in a metallurgical smelting aggregate. The pre-heating device comprises a housing provided with a material feed opening which is located on the upper end thereof and which can be closed by a closure element, and provided with an ejection opening which is located on the lower end thereof and which is joined to the metallurgical smelting aggregate. A material transporting device and means for conducting hot furnace gases through the pre-heating device are also provided. In order to realize the inventive pre-heating device, the invention provides that at least one base plate (6, 7) is provided which is fastened to the housing wall and whose end (16, 17) located in the interior extends only so far inside the housing as to maintain a fall shaft (14, 15) between this end and the opposing housing wall. A material transporting device is provided as a pushing device (8, 9) arranged directly above each base plate (6, 7). The pushing element of said pushing device can be displaced along each base plate in order to push the fed material (3) into the fall shaft (14, 15), said material being held in the housing shaft by the base plate (6, 7) and being heated by hot furnace gas streams.
Abstract:
An ash melting furnace capable of a high-efficiency, stable operation and accommodating load variations, which is used for mixed melting for heating and melting main ash and flying ash as burned ash simultaneously, characterized in that main ash (coarse grain ash) in an upper layer and flying ash (fine grain ash) in a lower layer are supplied in layers from one end of the furnace body and heated and melted by a burner while being moved to the other end, whereby enabling the burner, when an oxygen enriched burner is used, to properly control an oxygen amount added to air (concentration change included) and, in response to a heated and melted ash condition caused by the combustion of the oxygen enriched burner, to properly control, in addition to fuel supply amount, an ash supply amount as required by a change in the oxygen enriching concentration.
Abstract:
The present method of treating metal articles provides for dividing the working zone of the induction magnetic field into three consecutively located sections intended, respectively, for thermodiffusion, cooling and stabilizing for hardening, and linear moving of each article through the working zone so as to expose its whole surface to the uniform influence lines of force of the magnetic field. An installation for implementing the method comprises a multiloop induction heater (4) having an inductor (6) for heating the articles (12), a convection cooler (8) and a device (9) for stabilizing before hardening. Before the heating inductor (6) is mounted a pusher (15) which provides for linear movement of the articles through the treatment zone and which is synchronized with the actuating mechanism of the drive of the installation.
Abstract:
A furnace system (10) includes a furnace (12) and a preheater (14) configured to preheat material before it enters the furnace. The system further includes a duct system (16) including a mixing chamber (28) disposed between the furnace and preheater. The duct system further includes an exhaust duct (26) in fluid communication with an exhaust fluid outlet (24) of the furnace and configured to vent fluid exhausted from the furnace. The exhaust duct is in fluid communication with the mixing chamber and configured to redirect a portion of the fluid exhausted from the furnace to the mixing chamber. The duct system further includes a preheater duct (32) in fluid communication with the mixing chamber and a fluid inlet of the preheater and configured to direct fluid from the mixing chamber to the preheater. The system further includes means (18) for moving particulates out of the mixing chamber.
Abstract:
본 발명은 금속재료를 진공 환경에서 융해함에 있어서 그 진공도를 일정하게 유지하면서 금속재료를 진공융해챔버 내로 안정적으로 장입할 수 있는 진공융해용 금속재료 장입장치 및 그 방법에 관한 것이다. 본 발명의 진공융해용 금속재료 장입장치는, 상측에 공기배출관을 가지는 진공융해챔버; 일단이 상기 진공융해챔버의 일측에 연결되는 제1재료투입관; 일단이 상기 제1재료투입관의 타단에 연결되고, 일측에 공기배출관을 가지는 제2재료투입관; 상기 제1 및 제2 재료투입관 사이에 개재된 진공밸브; 상기 제2재료투입관의 타단에 일체로 구비되고, 상기 제2재료투입관의 내부통로와 소통하는 재료투입공을 가지는 지지플레이트; 상기 지지플레이트에 밀착되도록 전후진 이동가능하게 설치된 이동플레이트; 및 이동플레이트에 설치되어 제1 및 제2 재료투입관 내로 전후진하도록 설치된 장입플런저;를 포함한다.
Abstract:
An apparatus and method for introducing a compressible fuel, such as rubber, plastic, wood, paper products, and similar materials, into a gasifier is disclosed. The apparatus includes one or more stages of compression. One or more preheaters (96) are provided to soften or melt the fuel material during start-up of the gasifier. In operation, heat from the gasifier softens or melts the fuel material. One or more holes (42) located adjacent the exit end of the feed tube (16) allow the softened fuel material to exit the apparatus and enter the gasifier. In one embodiment, a "neck" region in combination with the compression forces the softened fuel material to exit the apparatus and enter the gasifier. In another embodiment, a gate temporarily blocks the exit end of the feed tube forcing the softened compressed fuel through the holes. This allows for separation of non-combustibles, such as wires used in reinforced tires, from the fuel material.
Abstract:
The invention relates to a novel preheating device and a method for preheating an iron scrap mixture before delivering the scrap iron into a metallurgical furnace. The invention primarily makes use of heat which is recovered from hot waste gasses that have been emitted from the furnace outlet. The invention is also provided for simultaneously reducing contaminated substances from the scrap iron and from the waste gasses with a downward stream comprised of the hot waste gas and of the downward falling scrap iron which flow in the same direction. The invention has a chamber comprising an upper compartment having a cold scrap iron feed provided for dumping cold scrap iron into the upper compartment and a hot gas inlet which is flow-connected to the furnace outlet. The chamber also has a lower compartment with an unloading mechanism for the heated scrap iron in order to forcibly deliver the heated scrap iron into the furnace and has a waste gas outlet which is flow-connected to a vacuum outlet and provided for evacuating the used waste gas. Gates which allow gas to pass through are arranged between each chamber compartment and sequentially operate between a closed gate position and an open gate position for receiving a scrap iron charge which is delivered in a closed gate position from the cold scrap iron feed in the same direction by means of gravity. During a predetermined hold period, the scrap iron charge is stored while hot waste gas flows downward out of the hot gas inlet in the upper compartment, penetrates through the scrap iron charge and through the closed gate, and flows out of the waste gas outlet in the lower compartment. The gates mix the scrap iron when it falls and serve to control the gravitational downward movement of the scrap iron charge from the upper compartment to the lower compartment after the hold period has elapsed.