DE334807C - Melting device for metals, especially precious metals - Google Patents
Melting device for metals, especially precious metalsInfo
- Publication number
- DE334807C DE334807C DE1920334807D DE334807DD DE334807C DE 334807 C DE334807 C DE 334807C DE 1920334807 D DE1920334807 D DE 1920334807D DE 334807D D DE334807D D DE 334807DD DE 334807 C DE334807 C DE 334807C
- Authority
- DE
- Germany
- Prior art keywords
- metals
- melting
- melting device
- precious metals
- especially precious
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
- B22C1/10—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for influencing the hardening tendency of the mould material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Description
Schmelzvorrichtung für Metalle, besonders Edelmetalle. Bisher wurde das Schmelzen der Edelmetalle entweder in Tiegeln, die in entsprechende Öfen eingesetzt werden, besonders wenn es sich um größere Mengen handelt, vorgenommen oder bei kleineren Mengen in aus Holzkohle geschnittenen Schmelzkohlen, d. h. in ein Stück Holzkohle, wurde eine der zu schmelzenden Menge entsprechende Vertiefung geschnitten und hierin das Metall mittels einer Gebläsegasflamme zum Schmelzen gebracht; die Flamme kommt also mit dem Schmelzgut in unmittelbare Berührung. Bei dieser Art des Schmelzens treten nun mehrere Unzuträglichkeiten auf. Erstens lassen sich nur eine geringe Anzahl von Schmelzungen in ein und derselben Kohle vornehmen, da ja die Kohle zum Teil verbrennt; - zweitens ist diese Verbrennung nur so lange eine vollkommene, als die Gasflamme die Kohle bestreicht, während des Gießens und beim Auskühlen der Kohle tritt aber eine stellenweise Verbrennung und damit eine Bildung von Kohlenoxydgas ein, die mit Rücksicht auf die im Arbeitsraum befindlichen Arbeiter vermieden werden muß. -* Drittens bleibt ein Teil des Schmelzgutes in den Poren der Kohle haften oder es treten Verluste an Schmelzgut durch Reißen oder gänzliches Zerspringen der Schmelzkohle ein. Durch die neue Schmelzvorrichtung werden diese Nachteile vermieden, während die Vorteile, die die Schmelzung in der offenen Flamme dadurch bietet, daß der Wärmeaufwand ein geringerer ist, gewahrt bleiben.Melting device for metals, especially precious metals. So far has been the melting of the precious metals either in crucibles that are used in appropriate furnaces are made, especially when it comes to larger quantities, or smaller ones Quantities in charcoal cut from charcoal, d. H. into a piece of charcoal, a recess corresponding to the amount to be melted was cut and placed in it melting the metal by means of a blown gas flame; the flame comes that is, in direct contact with the melting material. With this kind of melting there are now several inconveniences. First, can only be a small one Make number of smeltings in one and the same coal, since the coal is for Part burns; - secondly, this combustion is only perfect as long as when the gas flame brushes the coal, during the pouring and when the However, coal is burnt in places and thus carbon oxide gas is formed which are avoided with consideration for the workers in the work area got to. - * Thirdly, some of the molten material remains stuck in the pores of the coal or there are losses of melt material due to tearing or complete shattering of the Molten charcoal. The new melting device avoids these disadvantages, while the advantages that the melting in the open flame offers in that the heat consumption is lower, are preserved.
Die neue Vorrichtung besteht aus einer Schmelzschale B (Fig. z und 2) aus schwer schmelzbarem Stoff, z. B. Siloxyd,_ Quarzglas, Zirkonglas, Bergkristall o. dgl., welches eine glatte Oberfläche hat und selbst bei plötzlicher Erwärmung oder Abkühlung nicht reißt oder zerspringt. Die Schmelzschale B ,ist in einem mit einer die Wärme schlecht leitenden MasseD (Fig. i), z. B. Asbest, Schlacke, 2#2agnesiaoxyd, Papenit, Schamotte, Graphit o. dgl., ausgefüllten eisernen Kasten A (Fig. i und 2) derartig eingebettet, daß die Schale nicht mit dem Metall des Kastens in Berührung kommt. Durch diese Einbettung wird erreicht, daß die sonst eintretende Abkühlung der Schale und die damit zusammenhängende ungleichmäßige Flüssigkeit des Schmelzgutes, die gerade bei Edelmetallen wegen ihrer nachfolgenden starken Durcharbeitung in kaltem Zustande (Walzen, Treiben, Bördeln) vermieden werden muß, verhindert wird. Gleichzeitig bietet diese Auskleidung einen Schutz gegen das durch das Gewicht des Metalles begünstigte Durchreißen der sich im glühenden Zustand befindlichen Schale. Zur leichteren Handhabung der Schmelzvorrichtung beim Entleeren sind an dem Kasten zwei Achsen C und Cl (Fig. 2) angebracht, so daß die Vorrichtung in ein entsprechendes Gestell gehängt werden kann. Auch kann die eine oder beide Achsen mit Handgriffen ausgerüstet werden.The new device consists of a melting shell B (Fig. Z and 2) made of difficult-to-melt material, e.g. B. Siloxide, quartz glass, zirconium glass, rock crystal or the like, which has a smooth surface and even with sudden heating or cooling does not crack or shatter. The enamel shell B is in one with a poorly heat conducting mass D (Fig. i), e.g. B. Asbestos, slag, 2 # 2agnesiaoxide, Papenite, chamotte, graphite or the like, filled iron box A (Figs 2) embedded in such a way that the shell does not contact the metal of the box comes. This embedding ensures that the cooling that would otherwise occur the shell and the associated uneven liquid of the melting material, which especially with precious metals because of their subsequent strong work-through in cold conditions (rolling, driving, flanging) must be avoided, is prevented. At the same time, this lining offers protection against the weight of the Metal favored tearing through of the glowing shell. For easier handling of the melting device when emptying it are attached to the box two axes C and Cl (Fig. 2) attached so that the device in a corresponding Frame can be hung. One or both axes can also be easily operated be equipped.
Die neue Schmelzvorrichtung verhindert demnach durch ihren zweckentsprechenden Aufbau und unter Verwendung geeigneter blassen den Verlust an Schmelzgut und die Bildung gesundheitsschädlicher Gase im Arbeitsraum; sie bietet aberauchinsoferneineErsparnis, daeineSchmelzschale mehrere hundert Schmelzungen aushält.The new melting device therefore prevents by its appropriate Construction and use of suitable pale the loss of melt and the Formation of harmful gases in the work area; but it also offers savings because a melting pot can withstand several hundred melts.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE334807T | 1920-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE334807C true DE334807C (en) | 1921-03-19 |
Family
ID=6218631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1920334807D Expired DE334807C (en) | 1920-04-09 | 1920-04-09 | Melting device for metals, especially precious metals |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE334807C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1758159B1 (en) * | 1967-04-13 | 1972-02-03 | Air Reduction | Process for the production of a surface-heated crucible for holding molten metal |
-
1920
- 1920-04-09 DE DE1920334807D patent/DE334807C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1758159B1 (en) * | 1967-04-13 | 1972-02-03 | Air Reduction | Process for the production of a surface-heated crucible for holding molten metal |
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