DE483998C - Process for the production of molded bodies from iron - Google Patents

Process for the production of molded bodies from iron

Info

Publication number
DE483998C
DE483998C DES60536D DES0060536D DE483998C DE 483998 C DE483998 C DE 483998C DE S60536 D DES60536 D DE S60536D DE S0060536 D DES0060536 D DE S0060536D DE 483998 C DE483998 C DE 483998C
Authority
DE
Germany
Prior art keywords
iron
production
electrolyte
molded bodies
precipitated
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
Application number
DES60536D
Other languages
German (de)
Inventor
Dr Erich Birnbraeuer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens Plania Werke AG
Original Assignee
Siemens Plania Werke AG
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 Siemens Plania Werke AG filed Critical Siemens Plania Werke AG
Priority to DES60536D priority Critical patent/DE483998C/en
Application granted granted Critical
Publication of DE483998C publication Critical patent/DE483998C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00Making metallic powder or suspensions thereof
    • B22F9/16Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Description

Verfahren zur Herstellung von Formkörpern aus Eisen Es ist bekannt, Formkörper aus Eisen dadurch herzustellen, daß das Eisen aus Lösungen oxydisch ausgefällt, der Niederschlag ausgewaschen, reduziert und dann in Formen gepreßt wird. Besonders einfach und billig gestaltet sich das Verfahren, wenn man von Eisen irgendwelcher Herkunft, z. B. von Schrott, ausgeht, den man in beliebiger Form als Anode in einen Elektrolyten bringt und auflöst. Am besten wird dabei so verfahren, daß das gelöste Eisen kontinuierlich aus dem Elektrolyten wieder ausgefällt wird. Dazu genügt es, wenn man den Elektrolvten geeignet wählt. Nimmt man z. B. ein Alkalisalz, etwa Kochsalz oder Natriumsulfat, in ungefähr halbgesättigter Lösung, dann scheidet sich beispielsweise bei einer Stromdichte von ungefähr 2 bis 5 Amp. pro qcm unmittelbar oxydisches Eisen ab. Der Niederschlag ist verschieden, je nach dem angewandten Elektrolyten und nach der Temperatur. Bei kalter Kochsalzlösung entsteht der Hauptsache nach Eisenoxydulhy Brat; bei kalter Suffatlösung entsteht der Hauptsache nach Eisenoxydhydrat. Aus heißen Lösungen fällt hauptsächlich das Oxydul bzw. das Oxyd aus. Der Niederschlag wird gut ausgewaschen, beispielsweise so lange, bis keine Chlor- oder Schwefelsäurereaktion mehr eintritt, dann getrocknet und reduziert.Process for the production of shaped bodies from iron It is known Manufacture moldings from iron by the fact that the iron is oxidically precipitated from solutions, the precipitate is washed out, reduced and then pressed into molds. Particularly The process is simple and cheap if one can think of any iron Origin, e.g. B. of scrap, which can be used as an anode in any form Brings and dissolves electrolytes. It is best to proceed in such a way that the dissolved Iron is continuously re-precipitated from the electrolyte. For this it is enough if one chooses the electrolvte appropriately. If you take z. B. an alkali salt, such as table salt or sodium sulfate, in approximately half-saturated solution, then for example separates at a current density of about 2 to 5 amps per square centimeter, directly oxidic iron away. The precipitation varies according to the electrolyte used and according to the temperature. When the saline solution is cold, the main thing is that iron oxydulhy occurs Roast; in the case of cold Suffat solution, the main result is iron oxide hydrate. the end In hot solutions it is mainly the oxide or the oxide that precipitates. The precipitation is washed out well, for example until there is no chlorine or sulfuric acid reaction more enters, then dried and reduced.

Am geeignetsten ist die Reduktion im Wasserstoffstrom. Es muß aber dafür gesorgt werden, daß die Temperatur nicht zu niedrig ist, weil sonst das Eisen sich an der Luft =wieder oxydiert. Arbeitet man oberhalb von 700°, am besten bei etwa 85o°, so bekommt man ein sehr brauchbares, äußerst widerstandsfähiges und sehr plastisches Eisen, das sich leicht in Formen pressen läßt. Man kann, statt mitWasserstoff zu reduzieren, auch andere Reduktionsmittel anwenden, z. B. Wasserstoff enthaltende Gase oder Gasgemische. Je nach der Wahl solcher Reduktionsmittel bekommt man aber mehr oder weniger verunreinigtes Eisen. Das mit Wasserstoff erhaltene Produkt ist von außerordentlicher Reinheit und Widerstandsfähigkeit.The most suitable is the reduction in a hydrogen stream. But it has to it must be ensured that the temperature is not too low, otherwise the iron in the air = re-oxidized. If you work above 700 °, it is best to work at about 85o °, so you get a very useful, extremely tough and very plastic iron that can be easily pressed into shapes. You can, instead of using hydrogen to reduce, also use other reducing agents, e.g. B. containing hydrogen Gases or gas mixtures. However, depending on the choice of such reducing agent, you get more or less contaminated iron. The product obtained with hydrogen is of extraordinary purity and resilience.

Das Verfahren kann daher auch verwendet werden, um weniger reines Eisen, z. B. Gußeisen oder Roheisen anderer Art oder Schrott, auf reines Eisen zu verarbeiten.The method can therefore also be used to produce less pure Iron, e.g. B. cast iron or pig iron of another type or scrap, towards pure iron to process.

Claims (3)

PATENTANSPRÜCHE: r. Verfahren zur Herstellung von Formkörpern aus Eisen, dadurch gekennzeichnet, daß Eisen als Anode in einem Elektrolyten aufgelöst und aus dem Elektrolyten ausgefällt wird, und daß die ausgefällte oxydische Eisenverbindung bei erhöhter Temperatur reduziert und alsdann durch Pressen geformt wird. PATENT CLAIMS: r. Process for the production of shaped bodies from iron, characterized in that iron as anode is dissolved in an electrolyte and precipitated from the electrolyte, and that the precipitated oxidic iron compound is reduced at elevated temperature and then shaped by pressing. 2. Verfahren nach Anspruch z, dadurch gekennzeichnet, daß eine Lösung von Alkalisalz (Kochsalz, `atriumsulfat) als Elektrolyt verwendet wird. 2. Procedure according to claim z, characterized in that a solution of alkali salt (common salt, `atrium sulfate) is used as the electrolyte. 3. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß die Reduktion mittels Wasserstoff bei Temperaturen von über 700°, vorteilhaft bei etwa 85o°, geschieht.3. The method according to claim r, characterized characterized in that the reduction by means of hydrogen at temperatures above 700 °, advantageously at around 85o °, happens.
DES60536D 1922-08-06 1922-08-06 Process for the production of molded bodies from iron Expired DE483998C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES60536D DE483998C (en) 1922-08-06 1922-08-06 Process for the production of molded bodies from iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES60536D DE483998C (en) 1922-08-06 1922-08-06 Process for the production of molded bodies from iron

Publications (1)

Publication Number Publication Date
DE483998C true DE483998C (en) 1929-10-08

Family

ID=7494175

Family Applications (1)

Application Number Title Priority Date Filing Date
DES60536D Expired DE483998C (en) 1922-08-06 1922-08-06 Process for the production of molded bodies from iron

Country Status (1)

Country Link
DE (1) DE483998C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976875C (en) * 1942-11-11 1964-07-02 Deutsche Edelstahlwerke Ag Process for the production of easily pressable and sinterable iron powder mixtures using powders from crushed iron parts or from sponge iron

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976875C (en) * 1942-11-11 1964-07-02 Deutsche Edelstahlwerke Ag Process for the production of easily pressable and sinterable iron powder mixtures using powders from crushed iron parts or from sponge iron

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