AT253236B - Permanent magnetic materials - Google Patents
Permanent magnetic materialsInfo
- Publication number
- AT253236B AT253236B AT557465A AT557465A AT253236B AT 253236 B AT253236 B AT 253236B AT 557465 A AT557465 A AT 557465A AT 557465 A AT557465 A AT 557465A AT 253236 B AT253236 B AT 253236B
- Authority
- AT
- Austria
- Prior art keywords
- permanent magnetic
- magnetic materials
- hydrochloric acid
- desc
- ferrites
- Prior art date
Links
- 239000000696 magnetic material Substances 0.000 title claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 7
- 238000005554 pickling Methods 0.000 claims description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 claims description 2
- 230000005347 demagnetization Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 238000010626 work up procedure Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000005408 paramagnetism Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Compounds Of Iron (AREA)
Description
<Desc/Clms Page number 1>
Permanentmagnetische Werkstoffe
Bei der Regenerierung bzw. Aufarbeitung von salzsauren Eisenbeizen ist es bekannt, die salzsauren Beizablaugen zum Zwecke der Abröstung derselben in heisse Flammgase zu versprühen. Dabei wird die Salzsäure als HCl-Gas wiedergewonnen und anschliessend in geeigneter Weise weiterbehandelt bzw. wiederverwendet. Das in den Beizablaugen enthaltene Eisen fällt bei diesem Verfahren alsEisen- (III)-oxyd an.
Es hat sich nun gezeigt-und dies bildet den Gegenstand der Erfindung - dass das Eisenoxyd, welches man auf diese Weise erhält, nach Reinigung durch Waschen mit schwach sauren und bzw. oder neutralen wässerigen Lösungen, gegebenenfalls Trocknung, und anschliessende Glühung bei Temperaturen oberhalb des Curie-Punktes des Materials (also oberhalb 6450 C) zur Beseitigung des Paramagnetismus, zur Herstellung von permanentmagnetischen Werkstoffen (Ferriten) verwendet werden kann.
Es ist dabei ausserordentlich überraschend, dass durch das einfache Waschen des Materials in der vorstehend angegebenen Weise die Chlorionen und andere Verunreinigungen in jenem hohen Masse entfernt werden können, welches für den hochqualifizierten Verwendungszweck erforderlich ist. Überraschend ist es auch, dass bei der geschilderten Röstweise ein hochaktives, für die Ferritbildung geeignetes Oxyd entsteht.
Durch die Erfindung wird somit ein Weg zur technisch bedeutungsvollen und wirtschaftlich vorteilhaften Verwendung eines Materials gewiesen, das bei der Aufarbeitung der ständig in grossen Mengen anfallenden Beizablaugen erhalten wird.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Permanent magnetic materials
In the regeneration or processing of hydrochloric iron pickling liquors, it is known to spray the hydrochloric acid pickling liquors into hot flame gases for the purpose of roasting them. The hydrochloric acid is recovered as HCl gas and then further treated or reused in a suitable manner. The iron contained in the pickling liquors is obtained as iron (III) oxide in this process.
It has now been shown - and this forms the subject of the invention - that the iron oxide which is obtained in this way, after cleaning by washing with weakly acidic and / or neutral aqueous solutions, optionally drying, and subsequent annealing at temperatures above the Curie point of the material (i.e. above 6450 C) can be used to eliminate paramagnetism, for the production of permanent magnetic materials (ferrites).
It is extremely surprising that by simply washing the material in the manner indicated above, the chlorine ions and other impurities can be removed to the extent that is necessary for the highly qualified application. It is also surprising that the roasting method described produces a highly active oxide that is suitable for ferrite formation.
The invention thus shows a way for the technically meaningful and economically advantageous use of a material which is obtained in the processing of the pickling liquor which is constantly accumulating in large quantities.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT557465A AT253236B (en) | 1965-06-21 | 1965-06-21 | Permanent magnetic materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT557465A AT253236B (en) | 1965-06-21 | 1965-06-21 | Permanent magnetic materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT253236B true AT253236B (en) | 1967-03-28 |
Family
ID=3577292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT557465A AT253236B (en) | 1965-06-21 | 1965-06-21 | Permanent magnetic materials |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT253236B (en) |
-
1965
- 1965-06-21 AT AT557465A patent/AT253236B/en active
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