DE1023891B - Process for nitrogen refining of melts from aluminum and its alloys - Google Patents

Process for nitrogen refining of melts from aluminum and its alloys

Info

Publication number
DE1023891B
DE1023891B DENDAT1023891D DE1023891DA DE1023891B DE 1023891 B DE1023891 B DE 1023891B DE NDAT1023891 D DENDAT1023891 D DE NDAT1023891D DE 1023891D A DE1023891D A DE 1023891DA DE 1023891 B DE1023891 B DE 1023891B
Authority
DE
Germany
Prior art keywords
aluminum
nitrogen
alloys
melts
hydrazoic acid
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.)
Pending
Application number
DENDAT1023891D
Other languages
German (de)
Original Assignee
Elsa Tauscher, geb. Hahn, Frankfurt/M
Publication date
Publication of DE1023891B publication Critical patent/DE1023891B/en
Pending legal-status Critical Current

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
    • C22B21/00—Obtaining aluminium
    • C22B21/06—Obtaining aluminium refining
    • C22B21/064—Obtaining aluminium refining using inert or reactive gases

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

PA T Ii N TA N S P R Ö CII E:PA T Ii N TA N S P R Ö CII E:

1. Verfahren zur Stickstoffraffination von Schmelzen aus Aluminium und seinen Legierungen, dadurch1. Process for nitrogen refining of melts from aluminum and its alloys, thereby

von Schmelzen aus Aluminiumof aluminum melts

und seinen Legierungenand its alloys

Anmelder:Applicant:

Elsa Täuscher, geb. Hahn,
Frankfurt/M., Schwarzburgstr. 5Elsa Täuscher, née Hahn,
Frankfurt / M., Schwarzburgstr. 5

gekennzeichnet, daß der Schmelze Salze der Stickstoffwasserstoffsäure zugesetzt werden, die bei der in der Schmelze vorliegenden Temperatur in Mischung mit Alkalihalogeniden unter kontinuierlicher Abgabe von Stickstoff zerfallen.in that the molten salts are the Stickstoffwasserstoffsäu re added, the lkalihaloge in the present in the melt temperature in a mixture with A halides disintegrate under continuous dispensing of nitrogen.

2. Verfahren nach Anspruch 1, gekennzeichnet durch das Einbringen eines Gemisches aus etwa 3 bis 5% Natriumazid und einer Mischung aus KCl und NaCl im Verhältnis 1 : 1 oder einer Mischung aus KCl, NaCl. NaF im Verhältnis von etwa 4,5 :4,5: 1 als Rest in die Schmelze des Aluminiums oder seiner Legierungen.2. The method according to claim 1, characterized by the introduction of a mixture of about 3 to 5% sodium azide and a mixture of KCl and NaCl in a ratio of 1: 1 or a mixture of KCl, NaCl. NaF in the ratio of about 4.5: 4.5: 1 as the remainder in the melt of the aluminum or its alloys.

Claims (1)

DEUTSCHESGERMAN Zur Schmelzraffination von Aluminium und seinen Legierungen ist es bekannt, Chlorgas und anschließend gasförmigen Stickstoff in die Metallschmelze einzublasen. Dieses Verfahren bedingt jedoch einen erheblichen apparativen Aufwand. Man ist daher schon dazu übergegangen, das Chlorgas durch die Verwendung von halogenierten Kohlenwasserstoffen, etwa Hexachloräthan, zu ersetzen. Es ist jedoch bisher nicht gelungen, für den gasförmigen Stickstoff ein ihn mit der gleichen Vollkommenheit in der Wirkung ersetzendes Schmelzpräparat zu finden.For refining aluminum and its alloys, it is known to use chlorine gas and then subsequently to blow gaseous nitrogen into the molten metal. However, this method requires a considerable amount equipment expenditure. One has therefore already gone over to the chlorine gas through the use of halogenated To replace hydrocarbons, such as hexachloroethane. However, so far it has not been successful for the gaseous nitrogen an enamel preparation which replaces it with the same perfection in its effect to find. Es hat sich nun gezeigt, daß Salze der Stickstoffwasserstoffsäure in Gegenwart eines Salzgemisches aus Alkalihalogeniden bei den in Aluminiumschmelzen üblicherweise herrschenden Temperaturen kontinuierlieh Stickstoff abspalten und nicht spontan zerfallen. Durch diese Eigenschaft eignen sich somit diese Salze der Stickstoffwasserstoffsäure in Mischung mit Alkalihalogeniden vorzüglich als Mittel zur Stickstoffraffination von Schmelzen aus Aluminium und seinen Legierungen. Dieses Salzgemisch läßt sich dabei in vorbestimmter Bemessung mittels einer Tauchglocke leicht in die Schmelze einbringen.It has now been shown that salts of hydrazoic acid in the presence of a salt mixture from Alkali halides at the temperatures usually prevailing in aluminum melts continuously Splitting off nitrogen and not spontaneously decomposing. This property makes these salts suitable hydrazoic acid mixed with alkali halides is an excellent agent for nitrogen refining of melts made of aluminum and its alloys. This salt mixture can be in predetermined Slightly introduce the dimensioning into the melt using an immersion bell. Als Beispiele der verwendbaren Salze der Stickstoffwasserstoffsäure und eines Alkalihalogenids werden genannt:As examples of the usable salts of hydrazoic acid and an alkali halide are named: Mischungmixture 44% NaCl
44% KCl
9% NaF oder44% NaCl
44% KCl
9% NaF or 3% NaN3 3% NaN 3 48% NaCl
48% KCl
4% NaN3 48% NaCl
48% KCl
4% NaN 3
DENDAT1023891D Process for nitrogen refining of melts from aluminum and its alloys Pending DE1023891B (en)

Publications (1)

Publication Number Publication Date
DE1023891B true DE1023891B (en) 1958-02-06

Family

ID=589077

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT1023891D Pending DE1023891B (en) Process for nitrogen refining of melts from aluminum and its alloys

Country Status (1)

Country Link
DE (1) DE1023891B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181227A1 (en) * 1984-11-08 1986-05-14 Alcan International Limited Treating aluminium with chlorine
DE4004845A1 (en) * 1990-02-16 1991-08-22 Riedelbauch & Stoffregen Gmbh Nitrogen refining aluminium (alloy) melts - by addition of alkali metal, (iso) cyanate and oxidising agent to melt
DE4438539C1 (en) * 1994-10-28 1995-11-09 Kraft Guenther Aluminium or alloy melt purificn. to remove trace metals, hydrogen and oxidic plankton

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181227A1 (en) * 1984-11-08 1986-05-14 Alcan International Limited Treating aluminium with chlorine
DE4004845A1 (en) * 1990-02-16 1991-08-22 Riedelbauch & Stoffregen Gmbh Nitrogen refining aluminium (alloy) melts - by addition of alkali metal, (iso) cyanate and oxidising agent to melt
DE4004845C2 (en) * 1990-02-16 1998-04-30 Foseco Gmbh Process for the nitrogen refining of melts from aluminum and aluminum alloys
DE4438539C1 (en) * 1994-10-28 1995-11-09 Kraft Guenther Aluminium or alloy melt purificn. to remove trace metals, hydrogen and oxidic plankton

Similar Documents

Publication Publication Date Title
DD201700A5 (en) METHOD FOR INGREDIENTING MAGNESIUM TO MELTED IRON AS BASIC METAL
DE1023891B (en) Process for nitrogen refining of melts from aluminum and its alloys
DE4310054C2 (en) Process and agent for the treatment of aluminum and aluminum alloy melts
CH370612A (en) Process for the production of electroplated copper coatings
AT131586B (en) Process for improving aluminum or aluminum alloys and aluminum-containing alloys.
DE490490C (en) Process for the production of usable titanium iron alloys in the liquid state
DE670524C (en) Production of a melt containing magnesium carbide
DE2159475A1 (en) Silicon tetrachloride prodn - by direct reaction of silicon and chlorine
DE1023232B (en) Process for the finishing of aluminum-silicon alloys
DE707609C (en) Method of making amber colored glass
AT156583B (en) Process for the production of a melt containing magnesium carbide.
DE745057C (en) Process for the production of building materials with a porous or cellular structure
AT218816B (en) Process for protecting metals and alloys against the corrosive effects of brines
DE1668861C (en) Process for the production of oxygen-containing alkahorganic aluminum complex compounds
DE890054C (en) Process for cleaning and degassing iron and metal melts by adding nitrides
DE421153C (en) Process for the production of ferro-tungsten or ferro-molybdenum
DE540947C (en) Fused salt baths for the heat treatment of magnesium and magnesium alloys
DE613511C (en) Magnesium alloy
DE951158C (en) Swellable water glass putty
DE337078C (en) Process for the production of practically aluminum-free metals and alloys from alloys containing aluminum
DE237165C (en)
DE629303C (en) Process for cleaning molten light metals
DE424297C (en) Electrolytic production of perborate
DE754996C (en) Solder for soldering silicon and silicon alloys
DE968275C (en) Process for alloying iron melts, in particular cast iron melts, with magnesium