AT46210B - Process to increase the reducibility of Spateisenstein by means of oxidizing roasting. - Google Patents
Process to increase the reducibility of Spateisenstein by means of oxidizing roasting.Info
- Publication number
- AT46210B AT46210B AT46210DA AT46210B AT 46210 B AT46210 B AT 46210B AT 46210D A AT46210D A AT 46210DA AT 46210 B AT46210 B AT 46210B
- Authority
- AT
- Austria
- Prior art keywords
- spateisenstein
- reducibility
- increase
- oxidizing roasting
- roasting
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 8
- 230000001590 oxidative effect Effects 0.000 title claims description 3
- 239000000463 material Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000005021 gait Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 201000009032 substance abuse Diseases 0.000 description 1
Landscapes
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Erhöhung der Reduzierbarkeit von Spateisenstein durch oxydierendes Rösten.
Verschiedene Erze, besonders die Spateisensteine, haben anderen Erzsorten gegenüber den Nachteil, im Hochofen schwieriger reduziert zu werden. Dieses rührt zum Teil daher, dass die Spate Oxydule enthalten, welche durch Kohlenoxydgas weit schwerer reduzierbar sind als die Oxyde. Des weiteren sind die gerösteten Spate, die beim Rösten meist zerfallen, infolge ihrer glatten Kristallflächen so ricselig, dass die einzelnen Rostkristalle die Hochofenbeschickung äusserst schnell durchlaufen und so von den entgegenströmenden Kohlenoxydgasen fast unbeeinflusst werden und unreduzicrt vor die Windformen und in das Eisenbad gelangen, wodurch dieses teilweise wieder entkohlt und so die Darstellung garer Eisensorten erschwert und infolgedessen der Koksverbrauch erhöht wird.
Es liegt daher grosses Interesse vor, zur Verminderung dieses Übelstandes die Reduzierbarkeit genannten Materiales zu erhöhen.
Dies wird durch nachstehend beschriebene Erfindung erreicht, durch welche die genannton belstände in einfacher Weise insgesamt behoben werden.
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leichten reduzierbaren Oxyde verwandelt. Um diese Methode auch bei ärmeren Spaten lohnend zu machen, empfiehlt es sich, das Material durch Ausscheiden der Gangarten (Silikate usw.) anzureichern, was durch besondere rAufbereitungsarten geschehen kann.
Das vorliegende Verfahren kann somit als eine Übertragung des für Magneteisenstein bekannton Brikettiervcrfahrons auf Spateisenstein bezeichnet werden. Es wurde bisher an-
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> ei. Die vorliegende Erfindung, weiche auf der Feststellung beruht, dass Spateisenstein, in der oben beschriebenen Weise behandelt, durch und durch gesinterte Briketts liefert, ist von grosser Bedeutung, weil die Spateisensteine in der beschriebenen Weise behandelt, beim Verschmelzen deerartig hoch manganhaltiges Roheisen liefeern, wie es ohne Zusatz von bisher meist vom Ausland bezogenen manganhaltigen ERzen nicht hergestellt werden konnte.
Es ist bereits bekannt, durch Rösten unter Luftzutritt den Spatoiscnstein in höhere Oxydationsstufen umzuwandeln, und es ist in der französischen Patentschrift Nr. 362145 auch ein Verfahren beschrieben, nach welchem die Rieseligkeit des gerösteten Spats veimieden wird, jedoch hat das Endprodukt dieses Verfahrens nicht die Eigenschaft, leichter reduzierbar zu sein. wie das Ausgangsmaterial, sondern infolge der vollkommenen Sinterung, wie es die Bildung von Nodules"naturgemäss mit sich bringt, ist die Reduzierbarkeit des
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<Desc / Clms Page number 1>
Process to increase the reducibility of Spateisenstein by means of oxidizing roasting.
Various ores, especially the spade iron stones, have the disadvantage compared to other ore types that they are more difficult to reduce in the blast furnace. This is partly due to the fact that the spate contain oxydules, which are much more difficult to reduce by carbon dioxide than the oxides. Furthermore, the roasted spades, which usually disintegrate during roasting, are so tricky due to their smooth crystal surfaces that the individual rust crystals pass through the furnace charge extremely quickly and are thus almost unaffected by the countercurrent carbon dioxide gases and get in front of the tunnels and the iron bath without reducing them this is partially decarburized again, making it more difficult to produce cooked iron types and consequently increasing the consumption of coke.
There is therefore great interest in increasing the reducibility of the said material in order to reduce this disadvantage.
This is achieved by the invention described below, by means of which the abuses mentioned are eliminated in a simple manner.
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transformed into easily reducible oxides. In order to make this method worthwhile even with poorer spades, it is advisable to enrich the material by eliminating the gaits (silicates, etc.), which can be done through special processing methods.
The present method can thus be described as a transfer of the briquetting method known for Magneteisenstein to Spateisenstein. So far it has been
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> egg. The present invention, which is based on the finding that Spateisenstein, treated in the manner described above, delivers through and through sintered briquettes, is of great importance because the Spateisenstein treated in the manner described, when fused, supply pig iron with a high manganese content, such as it could not be produced without the addition of manganese-containing ores, which were previously mostly purchased from abroad.
It is already known to convert the Spatoiscnstein into higher oxidation levels by roasting with access to air, and a process is also described in French patent specification No. 362145 by which the trickling of the roasted spar is avoided, but the end product of this process does not have the property to be more easily reducible. like the starting material, but as a result of the complete sintering, as it naturally involves the formation of nodules, is the reducibility of the
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Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE46210X | 1908-07-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT46210B true AT46210B (en) | 1911-01-25 |
Family
ID=5625224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT46210D AT46210B (en) | 1908-07-11 | 1909-04-05 | Process to increase the reducibility of Spateisenstein by means of oxidizing roasting. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT46210B (en) |
-
1909
- 1909-04-05 AT AT46210D patent/AT46210B/en active
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