AT64557B - Process for increasing the yield of chromium from chromium iron in the aluminothermic production of carbon-free chromium alloys. - Google Patents

Process for increasing the yield of chromium from chromium iron in the aluminothermic production of carbon-free chromium alloys.

Info

Publication number
AT64557B
AT64557B AT64557DA AT64557B AT 64557 B AT64557 B AT 64557B AT 64557D A AT64557D A AT 64557DA AT 64557 B AT64557 B AT 64557B
Authority
AT
Austria
Prior art keywords
chromium
yield
carbon
increasing
free
Prior art date
Application number
Other languages
German (de)
Original Assignee
Goldschmidt Ag Th
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Goldschmidt Ag Th filed Critical Goldschmidt Ag Th
Application granted granted Critical
Publication of AT64557B publication Critical patent/AT64557B/en

Links

Landscapes

  • Manufacture And Refinement Of Metals (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



    Verfahren zur Erhöhung der Ausbeute an Chrom aus Chromeisenstein bei der aluminothermischen Herstellung von kohlenstoffreien Chromlegierungen.   



   Im Stammpatente   Nr.   61683 ist ein Verfahren beschrieben zur Erhöhung der Ausbeute an Chrom bei der aluminothermischen Herstellung von kohlenstoffreiem Ferrochrom ans Chromeisenstein. Dieses beruht auf der Erkenntnis, dass bei der   aluminothermischen   Behandlung von Chromeisenstein zur Erzeugung von Ferrochrom ein grösserer Teil des im Chromeisenstein enthaltenen Chroms in die Legierung übergeht, wenn man eine gewisse variable   Mené chromoxid   der aluminothermischen Mischung zusetzt, als ohne einen derartigen Zusatz. Es gelingt so, die Ausbeute an Chrom aus dem Chromeisenstein bis um etwa 15 bis   200/0   zu erhöhen. 



   Es hat sich nun gezeigt, dass die eigenartige Eigenschaft des Chromoxydes, bei der aluminothermischen Behandlung von Chromeisenstein einen gewissen Prozentsatz Chrom mit zur Reaktion   heranzuziehen,   der sich sonst der Reaktion entzieht, auch anderen Metalloxyden   zukommt.   In erster Linie seien genannt die Oxyde on Kobalt, Nickel. Molybdän, Wolfram, Vanadium. Setzt   man also   z.   H.   einem aus Chromeisenstein und   Aluminium   bestehenden aluminothermischen Gemisch etwas   Kohaltoxyd hinzu und   entzündet die Mischung. so zeigt sich, dass in der entstehenden Legierung, die natürlicherweise auch Kobalt enthält, ein höherer Prozentsatz an Chrom enthalten ist, als ohne diesen Zusatz von   kobaltoxid.   



  In ähnlicher Weise wirken die obengonannten anderen Metalloxyde. 



   Die eben auseinandergesetzte, eigenartige Belebung der Reaktionsfahigkeit des Chroms hat besondere Bedeutung für die Herstellung von binären oder ternären Legierungen, deren eine   Komponente Chrom ibt.   Da auf diesem Wege die Ausbeute an Chrom ziemlich er-   heblich   gesteigert werden kann, so stellen sIch diese für die Stahlindustrie so ausserordentlich wichtigen Legierungen natürlich wesentlich billiger, als wenn man die einzelnen 
 EMI1.1 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



    Process for increasing the yield of chromium from chromium iron in the aluminothermic production of carbon-free chromium alloys.



   In parent patent no. 61683 a process is described for increasing the yield of chromium in the aluminothermic production of carbon-free ferrochromium on chrome iron stone. This is based on the knowledge that in the aluminothermic treatment of chrome iron stone to produce ferrochrome a larger part of the chromium contained in the chrome iron stone passes into the alloy if a certain variable mené chromium oxide is added to the aluminothermic mixture than without such an addition. It is thus possible to increase the yield of chromium from the chrome iron stone by about 15 to 200/0.



   It has now been shown that the peculiar property of chromium oxide of including a certain percentage of chromium for the reaction in the aluminothermic treatment of chromium iron stone, which otherwise eludes the reaction, also belongs to other metal oxides. First and foremost, the oxides on cobalt and nickel should be mentioned. Molybdenum, tungsten, vanadium. So if you set z. H. Add a little carbon oxide to an aluminothermic mixture consisting of chrome iron stone and aluminum and ignite the mixture. This shows that the resulting alloy, which naturally also contains cobalt, contains a higher percentage of chromium than without this addition of cobalt oxide.



  The other metal oxides mentioned above act in a similar manner.



   The peculiar stimulation of the reactivity of chromium, which has just been discussed, is of particular importance for the production of binary or ternary alloys, one of which is chromium. Since the yield of chromium can be increased quite considerably in this way, these alloys, which are so extraordinarily important for the steel industry, are of course much cheaper than if one were to buy the individual ones
 EMI1.1
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Erhöhung der Ausbeute an Chrom aus Chromeisenstein bei der aluminothermischen Herstellung von kohlenstoffreien Chromlegierungen nach Stammpatent Nr. 61683, EMI1.2 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process to increase the yield of chromium from chromium iron stone in the aluminothermic production of carbon-free chromium alloys according to parent patent No. 61683, EMI1.2 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT64557D 1912-07-05 1913-04-30 Process for increasing the yield of chromium from chromium iron in the aluminothermic production of carbon-free chromium alloys. AT64557B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE61683X 1912-07-05
DE64557X 1913-02-18

Publications (1)

Publication Number Publication Date
AT64557B true AT64557B (en) 1914-04-25

Family

ID=25749364

Family Applications (1)

Application Number Title Priority Date Filing Date
AT64557D AT64557B (en) 1912-07-05 1913-04-30 Process for increasing the yield of chromium from chromium iron in the aluminothermic production of carbon-free chromium alloys.

Country Status (1)

Country Link
AT (1) AT64557B (en)

Similar Documents

Publication Publication Date Title
DE3137694A1 (en) STAINLESS STEEL FERRITIC STEEL
AT152291B (en) Chromium-manganese steels with 0¨01 1¨5% carbon, 5 25% chromium, 10 35% manganese.
AT64557B (en) Process for increasing the yield of chromium from chromium iron in the aluminothermic production of carbon-free chromium alloys.
DE1533478A1 (en) Steel alloy
AT140041B (en) Heat-resistant austenitic steel alloys.
DE643444C (en) Austenitic chromium-nickel steel alloy safe against intergranular corrosion
DE285423C (en)
CH630414A5 (en) FERRITIC STEEL AND USE OF THE SAME FOR WELDED CONSTRUCTIONS.
DE2851274A1 (en) CHROME-CONTAINING METAL POWDER
DE1558656B2 (en) RUST- AND CORROSION-RESISTANT CAST STEEL
AT157396B (en) Non-magnetic bandage wires.
AT155141B (en) Austenitic filler metal for welding non-austenitic steels and gray cast iron.
DE1558656C3 (en) Rust and corrosion resistant cast steel
DE701565C (en) At higher temperatures, objects made of chrome-nickel steel are safe against intergranular corrosion
AT148135B (en) Manufacture of dovings for briquette presses from austenitic steel alloys.
AT148124B (en) Manufacture of forged or cast objects, which in the polished state must be absolutely rustproof, alkali-resistant and scale-resistant as well as highly wear-resistant, made of iron alloys containing carbon, chromium, molybdenum and possibly nickel.
DE3736965C2 (en)
AT105032B (en) Process for the production of stainless chromium steel and other iron alloys.
US1726489A (en) Alloy, etc.
AT140210B (en) Precipitation hardening alloys.
AT219079B (en) Process for the production of objects from austenitic chromium-nickel steel alloys
US1122907A (en) Process of manufacturing ferrochromium.
DE130686C (en)
AT217720B (en) Process for the production of metal alloys
DE426835C (en) Chilled cast alloy that is resistant to acids and alkalis