DE194716C - - Google Patents
Info
- Publication number
- DE194716C DE194716C DENDAT194716D DE194716DA DE194716C DE 194716 C DE194716 C DE 194716C DE NDAT194716 D DENDAT194716 D DE NDAT194716D DE 194716D A DE194716D A DE 194716DA DE 194716 C DE194716 C DE 194716C
- Authority
- DE
- Germany
- Prior art keywords
- slag
- iron
- reduced
- melting
- furnace
- 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.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 34
- 229910052742 iron Inorganic materials 0.000 claims description 17
- 239000002893 slag Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 5
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000001603 reducing Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001590 oxidative Effects 0.000 claims description 3
- 239000003638 reducing agent Substances 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims 1
- 239000011449 brick Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910001296 Malleable iron Inorganic materials 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 238000010405 reoxidation reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0086—Conditioning, transformation of reduced iron ores
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Es ist bereits vorgeschlagen worden, den bei der Herstellung von schmiedbarem Eisen unmittelbar aus Erzen erhaltenen reduzierten Eisenschwamm in einem gesonderten Schmelz-5 ofen unter einer Schlackendecke zu schmelzen. Hierbei ist aber ein großer Verlust durch Oxydation des Eisens unvermeidlich, was das Verfahren unwirtschaftlich macht. Andererseits ist von Siemens vorgeschlagen worden,It has already been proposed to be used in the manufacture of malleable iron Reduced sponge iron obtained directly from ores in a separate smelter 5 furnace to melt under a slag cover. But here is a great loss Oxidation of the iron inevitable, which makes the process uneconomical. on the other hand has been proposed by Siemens,
ίο die Reduktion und Schmelzung bei dem obigen Verfahren in demselben Ofen vorzunehmen und zur Vermeidung einer Wiederoxydation des reduzierten Eisenschwamms die Reduktionskohle als Decke auf die Schmelze zu bringen. Hierbei tritt aber ein Überschäumen der Schlacke infolge der heftigen Gasentwicklung, veranlaßt durch den Reduktionsvorgang, ein und zeitigt Übelstände. Bei dem neuen Verfahren werden nun durch passende Vereinigung der beiden genannten Verfahren die Nachteile jedes einzelnen vermieden.ίο the reduction and melting in the above Procedure to be carried out in the same oven and to avoid reoxidation of the reduced sponge iron to bring the reducing carbon onto the melt as a blanket. Here, however, there is an over-foaming the slag as a result of the violent evolution of gas caused by the reduction process, and causes evils. In the new process are now through appropriate association of the two methods mentioned, the disadvantages of each are avoided.
Die Erfindung besteht demnach in der weiteren Verarbeitung von in einem besonderen Ofen reduziertem Eisenschwamm in einem Schmelzofen unter einer Schlackendecke von unschädlicher, d. h. nicht oxydierender Zusammensetzung. Die Erfinder haben festgestellt, daß, wenn das reduzierte Eisen mit Schlacke, die Eisen in Gestalt von Ferriverbindungen enthält, in Berührung kommt, der Eisenschwamm wieder oxydiert wird, trotzdem er durch die Schlacke bedeckt und dadurch vor unmittelbarer Berührung mit denThe invention therefore consists in the further processing of a special one Furnace reduced iron sponge in a melting furnace under a slag roof of harmless, d. H. non-oxidizing composition. The inventors have found that if the reduced iron with slag, the iron in the form of ferric compounds contains, comes into contact, the sponge iron is oxidized again, although it is covered by the slag and thereby before direct contact with the
oxydierenden Gasen des Schmelzofens geschützt ist. Die Zusammensetzung der Schlacke im Schmelzofen ist daher so zu regeln,, daß die Eisenverbindungen der-Schlacke sich als Ferroverbindungen darin vorfinden. Man erreicht dies bei der Herstellung von Flußeiseii dadurch, daß man der Schlacke von Zeit zu Zeit festen Kohlenstoff oder ein anderes Reduktionsmittel zusetzt, welches eine größere Verwandtschaft für Sauerstoff besitzt, als Eisen für Sauerstoff hat.oxidizing gases of the furnace is protected. The composition of the slag In the melting furnace is therefore to be regulated, that the iron compounds of the slag are as Find ferrous compounds in it. One achieves this in the production of flußeiseii by adding solid carbon or another reducing agent to the slag from time to time adds, which is more closely related to oxygen than iron has to oxygen.
Anstatt festen Kohlenstoff der Schlacke zuzusetzen, kann man auch aus Kohlenstoff hergestellte Ziegel in bekannter Weise als Ausfütterung für den Schmelzofen benutzen, so daß sie mit der Schlacke in Berührung kommen.Instead of adding solid carbon to the slag, carbon can also be used Use bricks in the known way as lining for the melting furnace, see above that they come into contact with the slag.
Bei der Herstellung von Stahl wird der vorher in einem besonderen Ofen reduzierte Eisenschw'amm und fester Kohlenstoff oder " kohlenstoffhaltiges Material etwa in gleichen Mengen miteinander vermischt und das Ganze durch Teer ο. dgl. zu Ziegel von genügender Dichte geformt, die in der Schlacke im Ofen untersinken, wodurch ein Bad von hochkarburiertem Eisen gebildet wird, welches das Schmelzen des in den Ofen eingeführten Eisenschwamms bedeutend erleichtert. Die Mengen des hochkarburierten Eisens im Ofen und des zugeführten reduzierten Eisens richten sich nach der Qualität des herzustellenden Stahles, so daß also jeder Grad von Kohlenstoffgehalt im Stahl erhalten werden kann.In the production of steel, the amount previously reduced in a special furnace is reduced Sponge iron and solid carbon or carbonaceous material are roughly the same Quantities mixed together and the whole thing through tar ο. Like. To brick of sufficient Dense shaped that sink into the slag in the furnace, creating a bath of highly carburized Iron is formed, which greatly facilitates the melting of the sponge iron introduced into the furnace. the Adjust the quantities of high-carburized iron in the furnace and the reduced iron supplied depending on the quality of the steel to be produced, so that every degree of carbon content in the steel is preserved can.
Vorzugsweise wird ein Überschuß an Kohlenstoff in den Ziegeln verwandt, und zwar zum mindesten so viel,-um das in den Ziegeln enthaltene Eisen mit Kohlenstoff zu sättigen und außerdem, um die das Metall bedeckende Schlackenschicht in den Ferrozustand überzuführen. Ist dies nicht der Fall, so muß unter Umständen noch fester Kohlenstoff dem Metallbade im Schmelzofen zugelp setzt werden.Preferably an excess of carbon is used in the bricks, and at least enough to add carbon to the iron contained in the bricks saturate and also, around the layer of slag covering the metal in the ferrous state convict. If this is not the case, solid carbon may also have to be used be placed in the metal bath in the melting furnace.
Claims (2)
Publications (1)
Publication Number | Publication Date |
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DE194716C true DE194716C (en) |
Family
ID=457831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT194716D Active DE194716C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE194716C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968242C (en) * | 1942-12-30 | 1958-01-30 | Titania As | Process for the production of steel from iron ores |
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0
- DE DENDAT194716D patent/DE194716C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE968242C (en) * | 1942-12-30 | 1958-01-30 | Titania As | Process for the production of steel from iron ores |
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