摘要:
Disclosed is a method for granulating slag, especially from a blast furnace and/or a smelting reduction system. According to said method, a mixture of granulate and water obtained during the granulation process is delivered to a granulating container (4) and then to a dehydration system in which the granular slag is dehydrated while the vapors and gases that are created during the granulation process and contain H2S are at least partly condensed in a condensing chamber which is fluidically connected to the granulating container (4) by spraying water thereinto. Residual gases containing H2S are withdrawn from the condensing chamber below the point where water is sprayed in, and H2S is burned.
摘要:
Charging material needs to be distributed evenly in a furnace 30 or reactor to ensure its best operation. To this end a charging material distribution inside the enclosure of the furnace 30 is used which has a movable spout 4 through which the charging material is fed into the enclosure 30. The distribution device according the present invention is small in size and light in weight and has a moveable spout 4 which is suspended on a gimbal 2 on a fixed chute 3 inside the enclosure 30.
摘要:
The invention relates to an internally cooled billet guiding roller, preferably for a continuous casting installation, comprising a central rotary shaft (1) and at least one roller tube (4) which is supported on said shaft in a rotationally fixed manner. The aim of the invention is to ensure that the billet guiding roller is better able to bear mechanical and thermal stresses, is suitable for wide billets, and can be maintained in a cost-efficient manner. To this end, coolant channels (22, 22a, 22b, 22c) pass through the roller tube, said coolant channels being arranged in the roller tube, at a constant distance from the outer surface thereof. Preferably, at least one water diffuser ring (5) is arranged between the roller tube and the central shaft.
摘要:
The aim of the invention is a separation rate of foreign particles which is as high as possible in a tun dish with a minimised production of inclusions. Said aim is achieved, whereby the lined interior of the tun dish (1), depending on an operating bath level (h), fills the condition that a dimensionless relationship ( kappa ) between the lined surface (Aref) and the filling volume (V), defined by said lined surface and the free surface (ATop), dependent on the bath level derived from the relationship in formula (I), lies between 3.83 and 4.39.
摘要:
The invention relates to a method for improving the conditions at the commencement of a casting process in a twin-roll casting device, which does not use a dummy bar, said method comprising the following steps: an operating casting thickness is set and the casting rolls are rotated at a casting-roll peripheral speed, which corresponds to a reduced commencing casting speed in relation to the casting speed for stationary operation; molten metal is fed into one of the rotating casting rolls and into the molten metal chamber that is configured from lateral plates lying against the rolls and a cast metal bar with an essentially constant, predetermined cross-sectional size is formed, whilst the casting speed is simultaneously increased to a strip forming casting speed; the casting speed is subsequently increased to a strip separating speed, which is significantly higher than the speed sufficient to cause solidification and the metal strip that has been cast up to this point is separated; the stationary operation casting speed is set; the following cast metal strip is deviated onto a strip transport unit and the stationary casting operation commences. The invention also relates to a twin-roll casting device for carrying out said method.
摘要:
The invention relates to a method for production of a metal strip from a strip (6), cast directly from molten metal (4), whereby a trimming of the strip edges (9, 9') of the strip (6) is carried out, characterised in that the strip edges (9, 9') are cooled before the trimming in such way as to render said edges more brittle than the rest of the strip (6). The invention further relates to a unit for processing a thin metal strip (6), arising from the casting of thin strips directly from molten metal, characterised in comprising a unit for the controlled, exclusive or preferential cooling of the strip edges (9, 9') of the strip (6).
摘要:
Bei einem Verfahren zur Ermittlung von mechanischen Eigenschaften, insbesondere Hochtemperatureigenschaften von Werkstoffen, vorzugsweise von Metallen, insbesondere von eisenhältigen Metallen, mit Gußstruktur, wie sie z.B. beim Stranggießen auftritt, wird ein Probenträger (4) in eine Schmelze (2) des Werkstoffes getaucht und die am Probenträger (4) erstarrte Schicht aus Schmelze (2) auf Eigenschaften untersucht. Um den Werkstoff in einen Zustand nach einem Vergießen untersuchen zu können, ist das Verfahren dadurch gekennzeichnet, dass der Probenträger (4) nach Anhaften einer Schicht von Schmelze (2) aus der Schmelze (2) entnommen und die am Probenträger (4) haftende durcherstarrte Schicht von Schmelze (2) hinsichtlich ihrer Eigenschaften im am Probenträger (4) haftenden Zustand untersucht wird, vorzugsweise nach Abkühlung auf eine vorbestimmte Temperatur (Fig. 1).
摘要:
Gegenstand der Erfindung ist ein Verfahren zur Herstellung eines gegossenen Metallstranges hoher Reinheit aus einer Metallschmelze, wobei die Metallschmelze von einem Schmelzenbehälter (5) geregelt einem Verteilergefäß (8) zugeführt und von diesem Verteilergefäß geregelt in eine Stranggießkokille (4) abgeführt wird und wobei die Metallschmelze zumindest im Verteilergefäß während des stationären Gießbetriebes mit einem Abdeckmittel bedeckt ist. Um bei diesem Verfahren bereits unmittelbar mit Beginn der wenigstens annähernd stationären Gießphase einen qualitativ hochwertigen Metallstrang (13) gießen zu können, bei dem die Startphase möglichst kurz gehalten werden kann, wird vorgeschlagen, dass die sich in einer Erstfüllphase im Verteilergefäß ausbildende freie Badoberfläche der Metallschmelze nach Erreichen einer vorbestimmten wenigstens annähernd stationären Angussbadspiegelhöhe zumindest teilweise mit einem Abdeckmittel bedeckt wird.
摘要:
Die Erfindung betrifft ein kippbares metallurgisches Gefäß, mit einem das metallurgische Gefäß im Abstand zumindest teilweise umgebenden Tragring, wobei am metallurgischen Gefäß befestigte Konsolen (5a, 5b, 5c) am Tragring (2) aufliegen und das metallurgische Gefäß am Tragring mit Spannvorrichtungen (6, 6a, 6b, 6c) in seiner Lage festgelegt ist. Um bei der Herstellung einer gesicherten Verbindung oder beim Öffnen dieser gesicherten Verbindung zwischen dem metallurgischen Gefäß und dem Tragring ohne manuellen Eingriff eines Monteurs auszukommen wird vorgeschlagen, dass das metallurgischen Gefäß am Tragring mit durch Hydraulikelemente (17) betätigbare Spannvorrichtungen lösbar fixiert ist und die hydraulisch betätigbaren Spannvorrichtungen ein selbsthemmendes Klemmelement (14) umfassen.
摘要:
The invention relates to methods and a device for decarbonising a steel melt (3) during the production of stainless steel in a metallurgical vessel (2), especially in a converter, whereby the steel melt (3) is treated with oxygen and optionally an inert gas, especially argon and/or nitrogen. During the decarbonisation of said steel melt (3) such that it has a carbon content of below 0.3 wt. %, oxygen and optionally inert gas, especially argon and/or nitrogen, are brought into contact therewith (3) by means of an opening beneath the surface of the steel melt (3) and a blowing device arranged above the surface of the steel melt (3).