EP2405025A1 - Method for manufacturing alloy blanks - Google Patents

Method for manufacturing alloy blanks Download PDF

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Publication number
EP2405025A1
EP2405025A1 EP11168903A EP11168903A EP2405025A1 EP 2405025 A1 EP2405025 A1 EP 2405025A1 EP 11168903 A EP11168903 A EP 11168903A EP 11168903 A EP11168903 A EP 11168903A EP 2405025 A1 EP2405025 A1 EP 2405025A1
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EP
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Prior art keywords
molding
molding mixture
mixture
alloy
water
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EP11168903A
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German (de)
French (fr)
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EP2405025B1 (en
Inventor
Daniel Thomy
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Mfg Metall- und Ferrolegierungsgesellschaft Mbh Hafner Blondin & Tidou
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Mfg Metall- und Ferrolegierungsgesellschaft Mbh Hafner Blondin & Tidou
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/243—Binding; Briquetting ; Granulating with binders inorganic
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates

Definitions

  • the invention relates to a process for the production of alloy moldings to provide a molten metal in a smelting furnace with at least one alloying component or to increase its content in the molten metal, wherein a molding mixture using an alloying element containing or consisting of at least one alloying component, water and a binder is prepared and the molding mixture is processed to an insertable into the furnace alloy molding.
  • the invention further relates to an alloy molding and its use.
  • the production of such moldings is basically such that initially a molding mixture is formed, the proportions of alloying element, water, binder and an aggregate in the form of a supporting grain, such as sand, contains. Subsequently, this molding mixture is compacted into the alloy molding, be it in a stone molding press or in a vibrator ( WO 2005/118892 A1 ). For this to be possible, the molding mixture must have a viscoplastic or crumbly consistency.
  • the water used is such that it is just sufficient to cause binding of the binder and to achieve the required consistency.
  • the compression of the molding mixture is a complex operation and requires the presence of a suitable press.
  • the alloy moldings must be such a strength that they can be placed as bulk material in a furnace and go through the furnace largely undamaged.
  • Essential for the achievement of such strength is the grain structure of the molding mixture. Difficulties here are alloying elements which are present in dust form, for example filter dusts or cast iron dusts. Also not ideal are relatively coarse alloying elements, such as crushed scrap parts, metal chips or the like. Strength difficulties also occur when a carbon carrier is processed as the alloying element.
  • the invention is therefore an object of the invention to provide a process for the production of alloy moldings, which is inexpensive and can be used to produce alloy moldings using alloying elements in dust form or piece shape with sufficient strength.
  • This object is achieved in that at least as much water is added in the production of the molding mixture that the molding mixture is pourable, and that at least as much binder is added that the alloy molding produced from the molding mixture after seven days at the latest setting time at 20 ° C has a strength of at least 4 N / mm 2 , preferably at least 5 N / mm 2 , and that the molding mixture is poured into a casting mold and setting without application of external pressure and finally the resulting alloy molding is removed from the mold.
  • the basic idea of the invention is consequently not to compress the molding mixture, but to produce it by casting by first producing a pourable molding mixture and then allowing it to be poured into a casting mold and allowed to set, the aforementioned setting time commencing with the complete pouring of the molding mixture into the casting mold starts. It has been found that with this method, both dust-like and lumpy alloying elements can be processed into an alloy molding of sufficient strength, without requiring the use of a press for this purpose.
  • the method is inexpensive to carry out, and it is versatile, since it is suitable for alloying elements of various kinds and different grain sizes up to the piece size.
  • Suitable alloying elements are metals, including those from which the molten metal essentially consists, in particular iron, but also copper, zinc, chromium, manganese, nickel, molybdenum, titanium or vanadium.
  • the iron may also be in the form of iron alloys such as FeSi, FeMn, FeCr, FeNi, FeMo, FeTi or FeV.
  • Metal oxides and ores, such as FeO, Fe 2 O 3 , MnO are also suitable.
  • the alloying agent may also be a metallic silicon, for example in the form of SiC.
  • the inventive method but also for processing carbon carriers and / or unbound carbon as alloying element, such as graphite, coke breeze, petroleum coke, pitch coke, dust, etc. They can be used for carburizing the molten metal.
  • the alloying element may also be a mixture of at least be two of the aforementioned alloying components or alloying elements.
  • the lower limit for the addition of water is determined by the property of pourability of the molding mixture. In general, then sufficient water is present to ensure setting of the molding, especially if - as known in the art - cement is used. It is useful in order to avoid cavities in the alloy molding or lack of filling of the mold, if so much water is added that the molding mixture in the mold isszer Credd, in particular self-leveling. Under the latter is the property to understand that adjusts a flat surface without further action, such as shaking or stripping on the open side of the molding mixture poured into the mold.
  • the strength of the alloy molding with the same binder content is the lower, the higher the water content, ie it is to seek a compromise between good pourability of the molding mixture on the one hand and the final strength of the alloy molding on the other hand.
  • a superplasticizer as is customarily used in the production of concrete, for example lingninsulfonates, melamine-formaldehyde sulfonates, naphthalene-formaldehyde sulfonates, polycarboxylates or hydroxycarboxylic acids and their salts (see standard EN 934-2).
  • the proportion of the flow agent should be in the range of 0.01 to 0.5 Wt .-%, based on the weight of the molding mixture are.
  • a good processability results when the molding mixture is added so much water and optionally flow agent that the molding mixture a slump (measured according to the standard DIN EN 459-2, but without strokes) of at least 15 cm, preferably 19 cm and advantageously not more than 21 cm has.
  • a slump measured according to the standard DIN EN 459-2, but without strokes
  • the weight ratio of water to solid in the molding mixture should not exceed a value of 0.8.
  • Suitable binders are the binders generally used for building materials, in particular hydraulic binders such as cement. Since the binder for the inventively provided use of the alloy molding is an impurity, the proportion of the binder should not be much higher than necessary in order to achieve the strength provided according to the invention. It is therefore expedient if the highest possible possible cement is used, because then the binder content can be kept low. There is a connection to the quantity the water added to achieve pourability such that the higher the water content, the higher the amount of binder must be. In order to achieve a fast setting, a setting accelerator can be added to the cement, which accelerates the solidification and hardening process. The addition of binder should not exceed 40% by weight, based on the total molding mixture, but better not more than 20% by weight, but always provided that the abovementioned minimum strength is achieved.
  • a support grain is added to the molding mixture. It should have a maximum grain size of 1.5 cm. Preferably, sand should be used and the support grain should desirably be present at 5 to 40% by weight based on the total molding mixture.
  • the invention further provides that the molding mixture is vibrated in the mold and / or the free surface is smoothed.
  • a shaking is particularly recommended if the water content and optionally the content of superplasticizer are so low that there is a risk of the formation of voids or incomplete filling of the mold.
  • the surface should preferably be sprayed with water immediately after the casting process.
  • the Surface be provided with a moisture-impermeable or moisturizing Abbeckung.
  • the inventive method is suitable both for the use of an alloying element, which is present in small-sized form, preferably with a mean extent of 0.5 to 5 cm, but also for such an alloying element, which is added in dust or powder form, in particular with a grain size less than 0.1 mm.
  • both forms of alloying elements can be combined with each other, preferably in a weight ratio of 20:80 to 80:20.
  • Casting molds whose internal volume corresponds to the predetermined shape of the alloy molding can be used for the method according to the invention. Instead, however, a trough-shaped large mold can be used, whose interior is divided into individual forms, the large mold is filled with the molding mixture in a single casting. In this case, the interior of the large mold can be subdivided by webs which project upwards into the individual molds. It is then possible to fill the individual molds with the molding mixture so that the resulting alloy moldings are separated from each other. Alternatively, the large mold can also be filled so high that the free surface of the molding mixture is above the webs, so a one-piece structure in the form of a large molding similar to a (reversed) chocolate bar is created.
  • this large blank is then broken into individual pieces in a crusher, which are the alloy moldings form.
  • a break beyond the breaking of the webs between the individual moldings can be made so that the individual moldings thus formed form irregularly shaped molded pieces.
  • the invention in addition to the method according to the invention also an alloy molding, which is obtainable with the aid of the method described above, and the use of this alloy molding by adding it to a metal melting furnace during melting of metal, preferably in a cupola, converter, blast furnace or induction furnace.
  • EMC80 is meant a SiC raw material containing 80% pure SiC, the remainder being unreacted free C and SiO 2 .
  • the special agent 1 specified in Example 3 is the binder marketed by HeidelbergCement Bauscher für Geotechnik GmbH & Co. KG under the name “CEM-ROCK 489", while the special agent 2 specified in Example 4 is also from Heidelberg Cement Building Materials for Geotechnik GmbH & Co. KG is under the name “CEM-ROCK MFG” sold binder.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

The process of producing molded alloy to provide a molten metal in a melting furnace with an alloying element or to raise the molded alloy content in the molten metal, comprises producing a molding mixture using the alloy component containing or existing alloying element, water and a binding agent, and converting the molding mixture to a molding alloy introducible in the melting furnace, where water and binder are added during the production of the molding mixture so that the molding mixture is pourable and the molding alloy has a curing time of 7 days at 20[deg] C. The process of producing molded alloy to provide a molten metal in a melting furnace with an alloying element or to raise the molded alloy content in the molten metal, comprises producing a molding mixture using the alloy component containing or existing alloying element, water and a binding agent, and converting the molding mixture to a molding alloy introducible in the melting furnace, where water and binder are added during the production of the molding mixture so that the molding mixture is pourable and the molding alloy has a curing time of 7 days at 20[deg] C and a strength of 5 N/mm 2>, pouring the molding mixture into a cast, bonding the molding mixture with the cast without applying external pressure, and demolding the resulting alloy molding. The molding mixture is added with: much water so that the molding mixture is self-leveled and the mixture has a slump of less than 21 cm; and the solvent and/or an accelerator. The weight ratio of water to solid is = 0.8 and/or the binder is a hydraulic binder such as cement. The binder is added in the molding mixture in 20 wt.% based on the entire molding mixture. A supporting grain with a grain size of 1.5 cm is added in the molding mixture. The support is sand grain that are present in 5-40 wt.%. The free surface of the molding mixture is: smoothed and sprayed with water immediately after the casting process; and provided with a moisture impermeable covering. The alloying element: for the production of the molding mixture into small-sized form is used with a mean extension of 0.5-5 cm; and is added in the mixture in dust or powder form with the grain size of less than 0.1 mm. The weight ratio of the alloying element in dust and powder form is 20:80 and 80:20. The molding mixture is cast into large form, whose inner space is divided into individual molds by high-webs, which are filled with the molding mixture in the casting so that the produced molded alloy is broken into individual lumps after hardening the molded alloys.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung von Legierungsformlingen, um eine Metallschmelze in einem Schmelzofen mit wenigstens einem Legierungsbestandteil zu versehen oder dessen Anteil in der Metallschmelze zu vergrößern, wobei eine Formlingsmischung unter Verwendung eines den wenigsten einen Legierungsbestandteil enthaltenden oder daraus bestehenden Legierungselements, von Wasser und eines Bindemittels hergestellt und die Formlingsmischung zu einem in den Schmelzofen einbringbaren Legierungsformling verarbeitet wird. Die Erfindung bezieht sich des Weiteren auf einen Legierungsformling sowie auf dessen Verwendung.The invention relates to a process for the production of alloy moldings to provide a molten metal in a smelting furnace with at least one alloying component or to increase its content in the molten metal, wherein a molding mixture using an alloying element containing or consisting of at least one alloying component, water and a binder is prepared and the molding mixture is processed to an insertable into the furnace alloy molding. The invention further relates to an alloy molding and its use.

Im Stand der Technik ist es bekannt, die Zusammensetzung einer Metallschmelze in einem Schmelzofen durch Zugabe von Legierungsformlingen gezielt zu beeinflussen, die ein Legierungselement enthalten, in dem ein oder mehrere Legierungsbestandteile vorhanden sind, sei es elementar oder in Form einer chemischen Verbindung. Ein Beispiel hierfür ist die Aufsilizierung von Eisenschmelzen in Kupolöfen mit Hilfe von Legierungsformlingen, die als Legierungselement einen Siliziumträger wie SiC oder FeSi enthalten (vgl. DE 1 583 262 B , DE 26 38 117 B , DE 196 02 486 C1 , DE 199 17 008 A1 ). Ein weiteres Beispiel ist die Zugabe von Eisenmaterialien als Legierungselement mittels diese enthaltenden Legierungsformlingen (vgl. DE 44 16 699 A1 , DE 297 03 389 U1 , DE 1 143 837 B , DE 197 12 042 C1 , WO 2005/118892 A1 , DE 10 2005 062 036 A1 ) in Eisenschmelzen, wobei die Zugabe in erster Linie aus Recyclinggründen geschieht. Dies kann auch kombiniert werden mit der Zugabe von Silizium (vgl. EP 1 624 079 A1 ). Solche Legierungsformlinge können auch in Vertikalkammerreduktinsöfen verwendet werden (vgl. DD 139 601 C ) oder zur Kühlmittelbeschickung in Stahlkonvertern ( DE 25 01 636 A ).In the prior art it is known to deliberately influence the composition of a molten metal in a smelting furnace by adding alloy moldings containing an alloying element in which one or more alloying constituents are present, be it elemental or in the form of a chemical compound. An example of this is the Aufsilizierung of molten iron in cupola with the help of alloy moldings containing a silicon substrate such as SiC or FeSi as alloying element (see. DE 1 583 262 B . DE 26 38 117 B . DE 196 02 486 C1 . DE 199 17 008 A1 ). Another example is the addition of iron materials as alloying elements by means of alloy moldings containing them (see. DE 44 16 699 A1 . DE 297 03 389 U1 . DE 1 143 837 B . DE 197 12 042 C1 . WO 2005/118892 A1 . DE 10 2005 062 036 A1 ) in molten iron, with the addition occurring primarily for recycling reasons. This can also be combined with the addition of silicon (cf. EP 1 624 079 A1 ). Such alloy moldings can also be used in vertical chamber reductin furnaces (cf. DD 139 601 C ) or to the coolant charge in steel converters ( DE 25 01 636 A ).

Im Übrigen ist es seit langem bekannt, bestimmte Materialien zu brikettieren, beispielsweise zur Schlackenbildung in Schmelzöfen (vgl. DE 43 08 294 A ) und zur Deponierung (vgl. DE 42 07 265 A1 ).Incidentally, it has long been known to briquet certain materials, for example, for slag formation in melting furnaces (see. DE 43 08 294 A ) and for landfilling (cf. DE 42 07 265 A1 ).

Die Herstellung solcher Formlinge geschieht grundsätzlich derart, dass zunächst eine Formlingsmischung gebildet wird, die Anteile aus Legierungselement, Wasser, Bindemittel und einem Zuschlagstoff in Form eines Stützkorns, wie z.B. Sand, enthält. Anschließend wird diese Formlingsmischung zu dem Legierungsformling verdichtet, sei es in einer Steinformpresse oder sei es in einem Rüttler ( WO 2005/118892 A1 ). Damit dies möglich ist, muss die Formlingsmischung eine zähplastische oder krümelige Konsistenz haben. Das dabei verwendete Wasser ist so bemessen, dass es gerade ausreichend ist, ein Abbinden des Bindemittels zu bewirken und die erforderliche Konsistenz zu erreichen.The production of such moldings is basically such that initially a molding mixture is formed, the proportions of alloying element, water, binder and an aggregate in the form of a supporting grain, such as sand, contains. Subsequently, this molding mixture is compacted into the alloy molding, be it in a stone molding press or in a vibrator ( WO 2005/118892 A1 ). For this to be possible, the molding mixture must have a viscoplastic or crumbly consistency. The water used is such that it is just sufficient to cause binding of the binder and to achieve the required consistency.

Das Verpressen der Formlingsmischung ist ein aufwendiger Arbeitsvorgang und setzt das Vorhandensein einer geeigneten Presse voraus. Mit Hilfe der Presse und dem Abbindeprozess müssen die Legierungsformlinge eine solche Festigkeit erhalten, dass sie als Schüttgut in einen Schmelzofen aufgegeben werden können und den Schmelzofen weitgehend unbeschädigt durchlaufen. Wesentlich für die Erlangung einer solchen Festigkeit ist der Kornaufbau der Formlingsmischung. Schwierigkeiten machen hier Legierungselemente, die in Staubform vorliegen, beispielsweise Filterstäube oder Gießhallenstäube. Ebenfalls nicht ideal sind relativ grobe Legierungselemente, beispielsweise zerkleinerte Schrottteile, Metallspäne oder dergleichen. Festigkeitsschwierigkeiten treten ebenfalls auf, wenn als Legierungselement ein Kohlenstoffträger verarbeitet wird.The compression of the molding mixture is a complex operation and requires the presence of a suitable press. With the help of the press and the setting process The alloy moldings must be such a strength that they can be placed as bulk material in a furnace and go through the furnace largely undamaged. Essential for the achievement of such strength is the grain structure of the molding mixture. Difficulties here are alloying elements which are present in dust form, for example filter dusts or cast iron dusts. Also not ideal are relatively coarse alloying elements, such as crushed scrap parts, metal chips or the like. Strength difficulties also occur when a carbon carrier is processed as the alloying element.

Der Erfindung liegt folglich die Aufgabe zugrunde, ein Verfahren zur Herstellung von Legierungsformlingen bereitzustellen, das kostengünstig ist und mit dem sich Legierungsformlinge unter Verwendung von Legierungselementen auch in Staubform oder Stückform mit ausreichender Festigkeit herstellen lassen.The invention is therefore an object of the invention to provide a process for the production of alloy moldings, which is inexpensive and can be used to produce alloy moldings using alloying elements in dust form or piece shape with sufficient strength.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass bei der Herstellung der Formlingsmischung mindestens so viel Wasser zugesetzt wird, dass die Formlingsmischung gießfähig ist, und dass mindestens so viel Bindemittel zugegeben wird, dass der aus der Formlingsmischung hergestellte Legierungsformling nach spätestens sieben Tagen Abbindezeit bei 20°C eine Festigkeit von wenigstens 4 N/mm2, vorzugsweise wenigstens 5 N/mm2, hat, und dass die Formlingsmischung in eine Gießform eingegossen wird und darin ein Abbinden ohne Anwendung äußerer Druckeinwirkung erfolgt und schließlich der so entstandene Legierungsformling entformt wird. Grundgedanke der Erfindung ist es folglich, die Formlingsmischung nicht zu verpressen, sondern mittels Gießen herzustellen, indem zunächst eine gießfähige Formlingsmischung erstellt wird und diese dann in eine Gießform gegossen und abbinden gelassen wird, wobei die vorerwähnte Abbindezeit mit dem vollständigen Eingießen der Formlingsmischung in die Gießform beginnt. Es hat sich herausgestellt, dass mit diesem Verfahren sowohl staubförmige als auch grobstückige Legierungselemente zu einem Legierungsformling ausreichender Festigkeit verarbeitet werden können, ohne dass es hierfür des Einsatzes einer Presse bedarf. Das Verfahren ist kostengünstig durchführbar, und es ist vielseitig einsetzbar, da es sich für Legierungselemente verschiedenster Art und unterschiedlichster Korngrößen bis hin zur Stückigkeit eignet.This object is achieved in that at least as much water is added in the production of the molding mixture that the molding mixture is pourable, and that at least as much binder is added that the alloy molding produced from the molding mixture after seven days at the latest setting time at 20 ° C has a strength of at least 4 N / mm 2 , preferably at least 5 N / mm 2 , and that the molding mixture is poured into a casting mold and setting without application of external pressure and finally the resulting alloy molding is removed from the mold. The basic idea of the invention is consequently not to compress the molding mixture, but to produce it by casting by first producing a pourable molding mixture and then allowing it to be poured into a casting mold and allowed to set, the aforementioned setting time commencing with the complete pouring of the molding mixture into the casting mold starts. It has been found that with this method, both dust-like and lumpy alloying elements can be processed into an alloy molding of sufficient strength, without requiring the use of a press for this purpose. The method is inexpensive to carry out, and it is versatile, since it is suitable for alloying elements of various kinds and different grain sizes up to the piece size.

Als Legierungselement kommen Metalle, auch solche, aus denen die Metallschmelze im Wesentlichen besteht, insbesondere Eisen, aber auch Kupfer, Zink, Chrom, Mangan, Nickel, Molybden, Titan oder Vanadium in Frage. Das Eisen kann auch in Form von Eisenlegierungen wie FeSi, FeMn, FeCr, FeNi, FeMo, FeTi oder FeV vorliegen. Metalloxide und -erze, wie FeO, Fe2O3, MnO eignen sich gleichfalls. Das Legierungsmittel kann aber auch ein metallisches Silizium sein, beispielsweise in Form von SiC, sein. Darüber hinaus eignet sich das erfindungsgemäße Verfahren aber auch zur Verarbeitung von Kohlenstoffträgern und/oder ungebundenem Kohlenstoff als Legierungselement, beispielsweise Graphit, Koksgrus, Petrolkoks, Pechkoks, Dichtstaub etc. Sie können zum Aufkohlen der Metallschmelze verwendet werden. Schließlich kann das Legierungselement auch eine Mischung von zumindest zwei der vorgenannten Legierungsbestandteile bzw. Legierungselemente sein.Suitable alloying elements are metals, including those from which the molten metal essentially consists, in particular iron, but also copper, zinc, chromium, manganese, nickel, molybdenum, titanium or vanadium. The iron may also be in the form of iron alloys such as FeSi, FeMn, FeCr, FeNi, FeMo, FeTi or FeV. Metal oxides and ores, such as FeO, Fe 2 O 3 , MnO are also suitable. However, the alloying agent may also be a metallic silicon, for example in the form of SiC. In addition, the inventive method but also for processing carbon carriers and / or unbound carbon as alloying element, such as graphite, coke breeze, petroleum coke, pitch coke, dust, etc. They can be used for carburizing the molten metal. Finally, the alloying element may also be a mixture of at least be two of the aforementioned alloying components or alloying elements.

Bei dem erfindungsgemäßen Verfahren wird die Untergrenze für den Wasserzusatz durch die Eigenschaft der Gießfähigkeit der Formlingsmischung bestimmt. Im Allgemeinen liegt dann ausreichend Wasser vor, um ein Abbinden des Formlings zu gewährleisten, insbesondere wenn hierfür - wie im Stand der Technik bekannt - Zement verwendet wird. Dabei ist es zwecks Vermeidung von Lunkern in dem Legierungsformling oder mangelnder Ausfüllung der Gießform zweckmäßig, wenn so viel Wasser zugesetzt wird, dass die Formlingsmischung in der Gießform selbstzerlaufend, insbesondere selbstnivellierend ist. Unter letzterem ist die Eigenschaft zu verstehen, dass sich an der offenen Seite der in die Gießform eingegossenen Formlingsmischung eine ebene Oberfläche ohne weitere Maßnahmen, beispielsweise Rütteln oder Abstreifen, einstellt.In the method according to the invention, the lower limit for the addition of water is determined by the property of pourability of the molding mixture. In general, then sufficient water is present to ensure setting of the molding, especially if - as known in the art - cement is used. It is useful in order to avoid cavities in the alloy molding or lack of filling of the mold, if so much water is added that the molding mixture in the mold is selbstzerlaufend, in particular self-leveling. Under the latter is the property to understand that adjusts a flat surface without further action, such as shaking or stripping on the open side of the molding mixture poured into the mold.

Zu beachten ist jedoch der Umstand, dass die Festigkeit des Legierungsformlings bei gleichem Bindemittelanteil um so geringer wird, je höher der Wasseranteil ist, d.h. es ist ein Kompromiss zwischen guter Gießfähigkeit der Formlingsmischung einerseits und der Endfestigkeit des Legierungsformlings andererseits zu suchen. Hierfür hilfreich ist die Zugabe eines Fließmittels, wie es gewöhnlich bei der Herstellung von Beton zur Anwendung kommt, beispielsweise Lingninsulfonate, Melamin-Formaldehyd-Sulfonate, Naphtalin-Formaldehyd-Sulfonate, Polycarboxylate oder Hydroxycarbonsäuren und deren Salze (vgl. Norm EN 934-2). Der Anteil des Fließmittels sollte im Bereich von 0,01 bis 0,5 Gew.-%, bezogen auf das Gewicht der Formlingsmischung, liegen. Durch Verwendung des Fließmittels wird der Wasseranspruch zwecks Herstellung der Gießfähigkeit deutlich herabgesetzt mit der Folge, dass der Legierungsformling eine höhere Festigkeit erhält oder zum Erreichen der erfindungsgemäßen Mindestfestigkeit ein geringerer Bindemittelanteil notwendig ist.It should be noted, however, that the strength of the alloy molding with the same binder content is the lower, the higher the water content, ie it is to seek a compromise between good pourability of the molding mixture on the one hand and the final strength of the alloy molding on the other hand. Helpful for this is the addition of a superplasticizer, as is customarily used in the production of concrete, for example lingninsulfonates, melamine-formaldehyde sulfonates, naphthalene-formaldehyde sulfonates, polycarboxylates or hydroxycarboxylic acids and their salts (see standard EN 934-2). , The proportion of the flow agent should be in the range of 0.01 to 0.5 Wt .-%, based on the weight of the molding mixture are. By using the flow agent, the water requirement for the production of the pourability is significantly reduced with the result that the alloy molding receives a higher strength or to achieve the minimum strength according to the invention, a lower binder content is necessary.

Eine gute Verarbeitbarkeit ergibt sich, wenn der Formlingsmischung so viel Wasser und gegebenenfalls Fließmittel zugesetzt wird, dass die Formlingsmischung ein Ausbreitmaß (gemessen entsprechend der Norm DIN EN 459-2, jedoch ohne Hubstöße) von wenigstens 15 cm, vorzugsweise 19 cm und zweckmäßigerweise nicht mehr als 21 cm hat. Bei Werten von 15 bis 18 cm Ausbreitmaß empfiehlt sich zwecks Vermeidung von Hohlräumen zwischen Gießform und Formlingsmischung sowie von Lunkern im Legierungsformling ein Rütteln der Formlingsmischung in der Gießform. Zweckmäßigerweise sollte das Gewichtsverhältnis Wasser zu Feststoff in der Formlingsmischung einen Wert von 0,8 nicht überschreiten.A good processability results when the molding mixture is added so much water and optionally flow agent that the molding mixture a slump (measured according to the standard DIN EN 459-2, but without strokes) of at least 15 cm, preferably 19 cm and advantageously not more than 21 cm has. For values of 15 to 18 cm slump size, it is recommended to shake the mixture of foundries in the casting mold in order to avoid voids between the casting mold and the molding mixture and voids in the alloy molding. Conveniently, the weight ratio of water to solid in the molding mixture should not exceed a value of 0.8.

Als Bindemittel kommen die im Allgemeinen für Baustoffe verwendeten Bindemittel in Frage, insbesondere hydraulische Bindemittel wie Zement. Da das Bindemittel für den erfindungsgemäß vorgesehenen Einsatz des Legierungsformlings einen Fremdstoff darstellt, sollte der Anteil des Bindemittels nicht sehr viel höher sein als erforderlich, um die erfindungsgemäß vorgesehene Festigkeit zu erreichen. Es ist deshalb zweckmäßig, wenn möglichst hochwertiger Zement verwendet wird, denn dann kann der Bindemittelanteil gering gehalten werden. Dabei besteht ein Zusammenhang zu der Menge des zwecks Erreichen der Gießfähigkeit zugesetzten Wassers dergestalt, dass die Menge des Bindemittels um so höher sein muss, je höher der Wassergehalt ist. Um ein schnelles Abbinden zu erreichen, kann dem Zement auch ein Abbindebeschleuniger zugesetzt werden, der den Erstarrungs- und Erhärtungsprozess beschleunigt. Der Zusatz von Bindemittel sollte 40 Gew.-%, bezogen auf die gesamte Formlingsmischung, nicht überschreiten, besser jedoch nicht höher als 20 Gew.-% liegen, immer jedoch vorausgesetzt, dass die oben genannte Mindestfestigkeit erreicht wird.Suitable binders are the binders generally used for building materials, in particular hydraulic binders such as cement. Since the binder for the inventively provided use of the alloy molding is an impurity, the proportion of the binder should not be much higher than necessary in order to achieve the strength provided according to the invention. It is therefore expedient if the highest possible possible cement is used, because then the binder content can be kept low. There is a connection to the quantity the water added to achieve pourability such that the higher the water content, the higher the amount of binder must be. In order to achieve a fast setting, a setting accelerator can be added to the cement, which accelerates the solidification and hardening process. The addition of binder should not exceed 40% by weight, based on the total molding mixture, but better not more than 20% by weight, but always provided that the abovementioned minimum strength is achieved.

Nach der Erfindung ist ferner vorgesehen, dass der Formlingsmischung ein Stützkorn zugegeben wird. Es sollte eine Körnung von maximal 1,5 cm haben. Vorzugsweise sollte Sand verwendet werden, und das Stützkorn sollte zweckmäßigerweise mit einem Gewichtsanteil von 5 bis 40%, bezogen auf die gesamte Formlingsmischung, vorhanden sein.According to the invention, it is further provided that a support grain is added to the molding mixture. It should have a maximum grain size of 1.5 cm. Preferably, sand should be used and the support grain should desirably be present at 5 to 40% by weight based on the total molding mixture.

Die Erfindung sieht des Weiteren vor, dass die Formlingsmischung in der Gießform gerüttelt und/oder deren freie Oberfläche glatt gestrichen wird. Eine Rüttelung empfiehlt sich insbesondere dann, wenn der Wassergehalt und gegebenenfalls der Gehalt an Fließmittel so gering sind, dass die Gefahr der Bildung von Lunkern oder nicht vollständiger Ausfüllung der Gießform besteht.The invention further provides that the molding mixture is vibrated in the mold and / or the free surface is smoothed. A shaking is particularly recommended if the water content and optionally the content of superplasticizer are so low that there is a risk of the formation of voids or incomplete filling of the mold.

Damit es im Bereich der freien Oberfläche der in der Gießform befindlichen Formlingsmischung nicht zu einem ungenügenden Abbinden oder zur Rissbildung kommt, sollte die Oberfläche vorzugsweise unmittelbar nach dem Gießvorgang mit Wasser besprüht werden. Alternativ oder in Kombination dazu kann die Oberfläche mit einer feuchtigkeitsundurchlässigen oder feuchtigkeitsspendenden Abbeckung versehen werden.In order to prevent insufficient setting or crack formation in the region of the free surface of the casting mixture in the casting mold, the surface should preferably be sprayed with water immediately after the casting process. Alternatively or in combination, the Surface be provided with a moisture-impermeable or moisturizing Abbeckung.

Das erfindungsgemäße Verfahren eignet sich sowohl für die Verwendung eines Legierungselementes, das in kleinstückiger Form, vorzugsweise mit einer mittleren Erstreckung von 0,5 bis 5 cm, vorliegt, aber auch für ein solches Legierungselement, das in Staub- oder Pulverform zugegeben wird, insbesondere mit einer Korngröße unter 0,1 mm. Dabei können beide Formen von Legierungselementen miteinander kombiniert werden, vorzugsweise in einem Gewichtsverhältnis von 20:80 bis 80:20.The inventive method is suitable both for the use of an alloying element, which is present in small-sized form, preferably with a mean extent of 0.5 to 5 cm, but also for such an alloying element, which is added in dust or powder form, in particular with a grain size less than 0.1 mm. In this case, both forms of alloying elements can be combined with each other, preferably in a weight ratio of 20:80 to 80:20.

Für das erfindungsgemäße Verfahren können Gießformen verwendet werden, deren Innenvolumen der vorbestimmten Formgebung des Legierungsformlings entspricht. Statt dessen kann jedoch auch eine wannenförmige Großform eingesetzt werden, deren Innenraum in Einzelformen unterteilt ist, wobei die Großform mit der Formlingsmischung in einem einzige Gießvorgang gefüllt wird. Dabei kann der Innenraum der Großform durch von deren Boden hochstehende Stege in die Einzelformen unterteilt sein. Es besteht dann die Möglichkeit, die Einzelformen mit der Formlingsmischung so zu füllen, dass die so entstehenden Legierungsformlinge voneinander getrennt sind. Alternativ kann die Großform aber auch so hoch gefüllt werden, dass die freie Oberfläche der Formlingsmischung oberhalb der Stege liegt, also ein einstückiges Gebilde in Form eines Großformlings ähnlich einer (umgedrehten) Schokoladentafel entsteht. Nach dem Entformen wird dieser Großformling dann in einem Brecher in einzelne Stücke gebrochen, die die Legierungsformlinge bilden. Dabei kann auch ein Brechen über das Brechen der Stege zwischen den Einzelformlingen hinaus vorgenommen werden, so dass die so gebildeten Einzelformlinge unregelmäßig geformte Formlingsstücke bilden.Casting molds whose internal volume corresponds to the predetermined shape of the alloy molding can be used for the method according to the invention. Instead, however, a trough-shaped large mold can be used, whose interior is divided into individual forms, the large mold is filled with the molding mixture in a single casting. In this case, the interior of the large mold can be subdivided by webs which project upwards into the individual molds. It is then possible to fill the individual molds with the molding mixture so that the resulting alloy moldings are separated from each other. Alternatively, the large mold can also be filled so high that the free surface of the molding mixture is above the webs, so a one-piece structure in the form of a large molding similar to a (reversed) chocolate bar is created. After demoulding, this large blank is then broken into individual pieces in a crusher, which are the alloy moldings form. In this case, a break beyond the breaking of the webs between the individual moldings can be made so that the individual moldings thus formed form irregularly shaped molded pieces.

Gegenstand der Erfindung ist neben dem erfindungsgemäßen Verfahren auch ein Legierungsformling, der mit Hilfe des vorbeschriebenen Verfahrens erhältlich ist, sowie die Verwendung dieses Legierungsformlings durch Zugabe in einen Metallschmelzofen beim Schmelzen von Metall, vorzugsweise in einen Kupolofen, Konverter, Hochofen oder Induktionsofen.The invention in addition to the method according to the invention also an alloy molding, which is obtainable with the aid of the method described above, and the use of this alloy molding by adding it to a metal melting furnace during melting of metal, preferably in a cupola, converter, blast furnace or induction furnace.

Nach dem erfindungsgemäßen Verfahren wurden beispielhaft folgende Legierungsformlinge hergestellt.The following alloy examples were prepared by the process according to the invention by way of example.

Beispiel 1example 1

SiC-Staub mit einer Körnung < 0,2 mmSiC dust with a grain size <0.2 mm 35,97 %35.97% ESiC80 mit einer Körnung von 0,1 - 10,0 mmESiC80 with a grain size of 0.1 - 10.0 mm -- Stützkorn mit einer Körnung von 0,5 - 1,0 cmSupport grain with a grain size of 0.5 - 1.0 cm 21,58 %21.58% Zement der Qualität CEM I 52,5 N (DIN EN 197-1)Cement grade CEM I 52.5 N (DIN EN 197-1) 14,39 %14.39% Fließmittel auf NaphtalinbasisNaphthalene-based superplasticizer -- Wasserwater 28,06 %28.06% Ausbreitmaßslump 16,4 cm16.4 cm Druckfestigkeit nach 7 Tagen bei 20°C'Compressive strength after 7 days at 20 ° C ' 5,4 N/mm2 5.4 N / mm 2

Beispiel 2Example 2

SiC-Staub mit einer Körnung < 0,2 mmSiC dust with a grain size <0.2 mm 32,85 %32.85% ESiC80 mit einer Körnung von 0,1 - 10,0 mmESiC80 with a grain size of 0.1 - 10.0 mm 25,55 %25.55% Stützkorn mit einer Körnung von 0,5 - 1,0 cmSupport grain with a grain size of 0.5 - 1.0 cm -- Zement der Qualität CEM I 52,5 N (DIN EN 197-1)Cement grade CEM I 52.5 N (DIN EN 197-1) 14,53 %14.53% Fließmittel auf NaphtalinbasisNaphthalene-based superplasticizer 0, 07 %0, 07% Wasserwater 27,01 %27.01% Ausbreitmaßslump 20,0 cm20.0 cm Druckfestigkeit nach 4 Tagen bei 20°C'Compressive strength after 4 days at 20 ° C ' 5,0 N/mm2 5.0 N / mm 2 Druckfestigkeit nach 7 Tagen bei 20°C'Compressive strength after 7 days at 20 ° C ' 6,4 N/mm2 6.4 N / mm 2

Beispiel 3Example 3

SiC-Staub mit einer Körnung < 0,2 mmSiC dust with a grain size <0.2 mm 32,61 %32.61% ESiC80 mit einer Körnung von 0,1 - 10,0 mmESiC80 with a grain size of 0.1 - 10.0 mm 25,36 %25.36% Stützkorn mit einer Körnung von 0,5 - 1,0 cmSupport grain with a grain size of 0.5 - 1.0 cm -- Sonderbindemittel 1Special binders 1 14,42 %14.42% Fließmittel auf NaphtalinbasisNaphthalene-based superplasticizer 0,07 %0.07% Wasserwater 27,54 %27.54% Ausbreitmaßslump 20,3 cm20.3 cm Druckfestigkeit nach 2 Tagen bei 20°C'Compressive strength after 2 days at 20 ° C ' 5,5 N/mm2 5.5 N / mm 2 Druckfestigkeit nach 7 Tagen bei 20°C'Compressive strength after 7 days at 20 ° C ' 7,5 N/mm2 7.5 N / mm 2

Beispiel 4Example 4

Unter "ESiC80" ist ein SiC-Rohstoff zu verstehen, der 80% reines SiC enthält, wobei der Rest nicht-reagiertes freies C und SiO2 ist. Bei dem im Beispiel 3 angegebenen Sondermittel 1 handelt es sich um das von der HeidelbergCement Baustoffe für Geotechnik GmbH & Co. KG unter dem Namen "CEM-ROCK 489" vertriebene Bindemittel, während das in Beispiel 4 angegebene Sondermittel 2 das ebenfalls von der Heidelberg Zement Baustoffe für Geotechnik GmbH & Co. KG unter der Bezeichnung "CEM-ROCK MFG" vertriebene Bindemittel ist.By "ESiC80" is meant a SiC raw material containing 80% pure SiC, the remainder being unreacted free C and SiO 2 . The special agent 1 specified in Example 3 is the binder marketed by HeidelbergCement Baustoffe für Geotechnik GmbH & Co. KG under the name "CEM-ROCK 489", while the special agent 2 specified in Example 4 is also from Heidelberg Cement Building Materials for Geotechnik GmbH & Co. KG is under the name "CEM-ROCK MFG" sold binder.

Claims (15)

Verfahren zur Herstellung von Legierungsformlingen, um eine Metallschmelze in einem Schmelzofen mit wenigstens einem Legierungsbestandteil zu versehen oder dessen Anteil in der Metallschmelze zu vergrößern, wobei eine Formlingsmischung unter Verwendung des den wenigstens einen Legierungsbestandteil enthaltenden oder daraus bestehenden Legierungselements, von Wasser und eines Bindemittels hergestellt und die Formlingsmischung zu einem in den Schmelzofen einbringbaren Legierungsformling verarbeitet wird, dadurch gekennzeichnet, dass bei der Herstellung der Formlingsmischung mindestens so viel Wasser zugesetzt wird, dass die Formlingsmischung gießfähig ist, und dass mindestens so viel Bindemittel zugesetzt wird, dass der aus der Formlingsmischung hergestellte Legierungsformling nach spätestens sieben Tagen Abbindezeit bei 20°C eine Festigkeit von wenigstens 4 N/mm2, vorzugsweise wenigstens 5 N/mm2, hat, und dass die Formlingsmischung in eine Gießform eingegossen wird und darin ein Abbinden ohne Anwendung äußerer Druckeinwirkung erfolgt und schließlich der so entstandene Legierungsformling entformt wird.A process for producing alloy ingots to provide a molten metal in a smelting furnace with at least one alloying ingredient or to increase its content in the molten metal, wherein a masterbatch mixture is prepared by using the alloying element containing or consisting of the at least one alloying element, water and a binder, and the molding mixture is processed into an alloying article which can be introduced into the furnace, characterized in that at least so much water is added during the production of the molding mixture that the molding mixture is pourable, and at least so much binder is added that the alloy molding produced from the molding mixture after a maximum of seven days setting time at 20 ° C has a strength of at least 4 N / mm 2 , preferably at least 5 N / mm 2 , and that the molding mixture is poured into a casting mold and therein a setting takes place without application of external pressure and finally the resulting alloy molding is removed from the mold. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als wenigstens ein Legierungselement ein Metall, insbesondere Eisen, auch als Eisenlegierung wie FeSi, FeMn, FeCr, FeNi, FeMo, FeTi, FeV, und/oder insbesondere Kupfer, Zink, Chrom, Mangan, Nickel, Molybden, Titan, Vanadium, oder als Metalloxide und -erze, wie FeO, Fe2O3, MnO, und/oder ein metallisches Silizium, vor allem in Form von SiC, und/oder ein Kohlenstoffträger und/oder ungebundener Kohlenstoff, zum Beispiel Graphit, Koksgruß, Petrolkoks, Pechkoks, Dichtstaub zum Aufkohlen der Metallschmelze oder eine Mischung von zumindest zwei der vorgenannten Legierungsbestandteile verwendet wird.A method according to claim 1, characterized in that at least one alloying element is a metal, in particular iron, also as iron alloy such as FeSi, FeMn, FeCr, FeNi, FeMo, FeTi, FeV, and / or in particular copper, zinc, chromium, manganese, nickel , Molybdenum, titanium, vanadium, or as metal oxides and ores, such as FeO, Fe 2 O 3 , MnO, and / or a metallic silicon, in particular in the form of SiC, and / or a carbon carrier and / or unbound carbon, for example, graphite, coke breeze, petroleum coke, pitch coke, dense dust for carburizing the molten metal, or a mixture of at least two of the foregoing alloying ingredients. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Formlingsmischung so viel Wasser zugesetzt wird, dass die Formlingsmischung selbstzerlaufend, insbesondere selbstnivellierend ist und/oder der Formlingsmischung so viel Wasser und ggf. Fließmittel zugesetzt wird, dass sie ein Ausbreitmaß von wenigstens 15 cm, vorzugsweise 19 cm und zweckmäßigerweise nicht mehr als 21 cm hat.A method according to claim 1 or 2, characterized in that the molding mixture is added so much water that the molding mixture selbstzerlaufend, in particular self-leveling and / or the molding mixture is added so much water and possibly plasticizer, that they have a slump of at least 15 cm , preferably 19 cm and expediently not more than 21 cm. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Formlingsmischung ein Fließmittel und/oder ein Beschleuniger zugegeben wird.Method according to one of claims 1 to 3, characterized in that the molding mixture, a flow agent and / or an accelerator is added. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Gewichtsverhältnis Wasser zu Feststoff einen Wert von 0,8 nicht überschreitet und/oder das Bindemittel ein hydraulisches Bindemittel, insbesondere Zement, enthält oder daraus entsteht.Method according to one of claims 1 to 4, characterized in that the weight ratio of water to solid does not exceed a value of 0.8 and / or the binder contains or forms a hydraulic binder, in particular cement. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Zusatz an Bindemittel 40 Gew.-%, vorzugsweise 20 Gew.-%, bezogen auf die gesamte Formlingsmischung, nicht überschreitet, und/oder dass der Formlingsmischung ein Stützkorn zugegeben wird, zweckmäßigerweise mit einer Körnung von maximal 1,5 cm, wobei das Stützkorn vorzugsweise Sand ist und insbesondere mit einem Gewichtsanteil von 5 bis 40%, bezogen auf das Gewicht der gesamten Formlingsmischung, vorliegt.Method according to one of claims 1 to 5, characterized in that the addition of binder 40 wt .-%, preferably 20 wt .-%, based on the total molding mixture, does not exceed, and / or that the support mixture is added to the molding mixture, Appropriately, with a grain size of a maximum of 1.5 cm, the Backbone is preferably sand and in particular with a weight fraction of 5 to 40%, based on the weight of the entire molding mixture, is present. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Formlingsmischung in der Gießform gerüttelt und/oder deren freie Oberfläche glatt gestrichen wird.Method according to one of claims 1 to 6, characterized in that the molding mixture shaken in the mold and / or the free surface is smoothed. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Oberfläche der Formlingsmischung in der Gießform vorzugsweise unmittelbar nach dem Gießvorgang mit Wasser besprüht wird.Method according to one of claims 1 to 7, characterized in that the surface of the molding mixture in the casting mold is preferably sprayed with water immediately after the casting process. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Oberfläche der Formlingsmischung in der Gießform, gegebenenfalls nach einem Besprühen mit Wasser, mit einer feuchtigkeitsundurchlässigen oder feuchtigkeitsspendenden Abdeckung versehen wird.Method according to one of claims 1 to 8, characterized in that the surface of the molding mixture is provided in the mold, optionally after spraying with water, with a moisture-impermeable or moisturizing cover. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Legierungselement für die Herstellung der Formlingsmischung in kleinstückiger Form, vorzugsweise mit einer mittleren Erstreckung zwischen 0,5 bis 5 cm, verwendet wird.Method according to one of claims 1 to 9, characterized in that the alloying element for the production of the molding mixture in small-piece form, preferably with a mean extent between 0.5 to 5 cm, is used. Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Legierungselement in Staub- oder Pulverform zugegeben wird, insbesondere mit einer Korngröße unter 0,1 mm.Method according to one of claims 1 to 10, characterized in that the alloying element is added in dust or powder form, in particular with a particle size of less than 0.1 mm. Verfahren nach Anspruch 10 und 11, dadurch gekennzeichnet, dass das wenigstens eine Legierungselement sowohl in kleinstückiger als auch in Staub- oder Pulverform verwendet wird, und dass das Gewichtsverhältnis ihrer Anteile zwischen 20:80 und 80:20 liegt.A method according to claim 10 and 11, characterized in that the at least one alloying element is used both in small pieces as well as in dust or powder form, and that the weight ratio of their proportions between 20:80 and 80:20. Verfahren nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass die Formlingsmischung in eine Großform gegossen wird, deren Innenraum in Einzelformen unterteilt ist, die mit der Formlingsmischung in einem Gießvorgang gefüllt werden, insbesondere wobei die Großform durch hochstehende Stege in die Einzelformen unterteilt ist und die Formlingsmischung höher eingefüllt wird als die Stege, und dass der so hergestellte Großformling nach dem Aushärten in einzelne stückige Legierungsformlinge gebrochen wird.Method according to one of claims 1 to 12, characterized in that the molding mixture is poured into a large mold whose interior is divided into individual forms, which are filled with the molding mixture in a casting process, in particular wherein the large mold is divided by upstanding webs in the individual forms and the molding mixture is filled higher than the webs, and that the thus prepared large molding is broken after curing into individual particulate alloy moldings. Legierungsformling mit einem Legierungselement, dadurch gekennzeichnet, dass es durch das Verfahren nach einem der Ansprüche 1 bis 13 erhältlich ist.Alloy molding with an alloying element, characterized in that it is obtainable by the method according to one of claims 1 to 13. Verwendung des Legierungsformlings nach Anspruch 14 durch Zugabe in einen Metallschmelzofen beim Schmelzen von Metall, vorzugsweise in einen Kupolofen, Konverter, Hochofen oder Induktionsofen.Use of the alloy molding according to claim 14, by adding it to a metal melting furnace when melting metal, preferably into a cupola furnace, converter, blast furnace or induction furnace.
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DD139601A5 (en) 1977-09-20 1980-01-09 Kinglor Metor Spa METHOD AND APPARATUS FOR PRODUCING BRIKETS FOR VERTICAL CHAMBER SUBSTITUTES AND BRICKS RECEIVED BY THIS METHOD
DE3940327C1 (en) * 1989-12-06 1991-06-20 Ruhrkohle Ag, 4300 Essen, De Cement-bonded coke mouldings - prepd. by mixing fine coke with mineral mortar and moulding moist mixt. in shaping machine
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DE4308294A1 (en) 1993-03-16 1994-09-22 Linde Ag Briquette for use as a slag-forming material in melting furnaces and manufacturing processes therefor
DE4416699A1 (en) 1993-06-04 1994-12-08 Linde Ag Process for the utilization of metallic residual material, in particular turnings material, in melting furnaces
DE19602486C1 (en) 1996-01-24 1997-06-12 Elkem Materials Briquette containing silicon-containing residues as an additive for metallurgical purposes and process for its production
DE29703389U1 (en) 1996-03-05 1997-06-26 Gasteier & Bilke Verfahrenstec Briquette from filter dust from iron foundries, which can be used as an additive in melting furnaces
DE19712042C1 (en) 1997-03-13 1998-06-10 Hansdieter Suetterlin Blast furnace charge agglomerate
DE19917008A1 (en) 1999-04-08 2000-10-19 Kempten Elektroschmelz Gmbh Alloying additive moulding, for cast iron production in cupola, induction or arc furnaces, comprises silicon carbide granules and a binder containing molasses and optionally calcium hydroxide
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EP1624079A1 (en) 2004-08-02 2006-02-08 Heinz Hafner Process for winning iron from waste material containing iron oxides and briquette for carrying out this process
DE102005062036A1 (en) 2005-12-22 2007-06-28 Thyssenkrupp Steel Ag Agglomerate stone used in blast furnaces for recovering pig iron comprises cement binder, organic fibers, carbon support, residue materials, solidifying accelerator and a balance of iron ore in the form of fine and/or very fine particles

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DE1143837B (en) 1959-11-25 1963-02-21 Maximilianshuette Eisenwerk Process for the briquetting of ferrous powdery substances
DE1583262B1 (en) 1967-07-06 1969-09-18 Werner Kessl Silicon carbide-containing moldings for cupolas
DE2501636A1 (en) 1974-01-18 1975-07-24 Shell Int Research PROCESS FOR THE PRODUCTION OF BRIQUETTES
DE2638117B1 (en) 1976-08-25 1977-10-20 Lung Bernhard Dr PROCESS FOR PROCESSING FINE MATERIALS CONTAINING SIC AND / OR FESI
DD139601A5 (en) 1977-09-20 1980-01-09 Kinglor Metor Spa METHOD AND APPARATUS FOR PRODUCING BRIKETS FOR VERTICAL CHAMBER SUBSTITUTES AND BRICKS RECEIVED BY THIS METHOD
DE3940327C1 (en) * 1989-12-06 1991-06-20 Ruhrkohle Ag, 4300 Essen, De Cement-bonded coke mouldings - prepd. by mixing fine coke with mineral mortar and moulding moist mixt. in shaping machine
DE4207265A1 (en) 1992-03-07 1993-09-09 Bmd Garant Entstaubungstechnik Prepn. of foundry filter dust for environment-friendly disposal - in which dust is mixed with binding material, pressed to form solid bodies, and fused in blast furnace
DE4308294A1 (en) 1993-03-16 1994-09-22 Linde Ag Briquette for use as a slag-forming material in melting furnaces and manufacturing processes therefor
DE4416699A1 (en) 1993-06-04 1994-12-08 Linde Ag Process for the utilization of metallic residual material, in particular turnings material, in melting furnaces
DE19602486C1 (en) 1996-01-24 1997-06-12 Elkem Materials Briquette containing silicon-containing residues as an additive for metallurgical purposes and process for its production
DE29703389U1 (en) 1996-03-05 1997-06-26 Gasteier & Bilke Verfahrenstec Briquette from filter dust from iron foundries, which can be used as an additive in melting furnaces
DE19712042C1 (en) 1997-03-13 1998-06-10 Hansdieter Suetterlin Blast furnace charge agglomerate
DE19917008A1 (en) 1999-04-08 2000-10-19 Kempten Elektroschmelz Gmbh Alloying additive moulding, for cast iron production in cupola, induction or arc furnaces, comprises silicon carbide granules and a binder containing molasses and optionally calcium hydroxide
US6409964B1 (en) * 1999-11-01 2002-06-25 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of Natural Resources Cold bonded iron particulate pellets
WO2005118892A1 (en) 2004-06-03 2005-12-15 Thyssenkrupp Steel Ag Agglomerated stone for using in shaft furnaces, corex furnaces or blast furnaces, method for producing agglomerated stones, and use of fine and superfine iron ore dust
EP1624079A1 (en) 2004-08-02 2006-02-08 Heinz Hafner Process for winning iron from waste material containing iron oxides and briquette for carrying out this process
DE102005062036A1 (en) 2005-12-22 2007-06-28 Thyssenkrupp Steel Ag Agglomerate stone used in blast furnaces for recovering pig iron comprises cement binder, organic fibers, carbon support, residue materials, solidifying accelerator and a balance of iron ore in the form of fine and/or very fine particles

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US20120167715A1 (en) 2012-07-05
DE102010031101A1 (en) 2012-01-12

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