DE1122564B - Process for iron extraction from suspended, dusty or fine-grained iron ores by means of fuels in a fine degree of distribution above the melting point of the non-gaseous reaction products - Google Patents
Process for iron extraction from suspended, dusty or fine-grained iron ores by means of fuels in a fine degree of distribution above the melting point of the non-gaseous reaction productsInfo
- Publication number
- DE1122564B DE1122564B DEW11930A DEW0011930A DE1122564B DE 1122564 B DE1122564 B DE 1122564B DE W11930 A DEW11930 A DE W11930A DE W0011930 A DEW0011930 A DE W0011930A DE 1122564 B DE1122564 B DE 1122564B
- Authority
- DE
- Germany
- Prior art keywords
- fine
- reaction bed
- coal
- reaction
- dusty
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/10—Roasting processes in fluidised form
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
- C21B13/0013—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state introduction of iron oxide into a bath of molten iron containing a carbon reductant
- C21B13/002—Reduction of iron ores by passing through a heated column of carbon
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
Verfahren zur Eisengewinnung aus in der Schwebe befindlichen, staubförmigen bzw. feinkörnigen Eisenerzen mittels Brennstoffen in feinem Verteilungsgrad oberhalb des Schmelzpunktes der nicht gasförmigen Reaktionsprodukte Das Hauptpatent 1086 256 schützt ein Verfahren zur Eisengewinnung aus staubförmigen bzw. feinkörnigen Eisenerzen mittels Brennstoffen in feinem Verteilungsgrad oberhalb des Schmelzpunktes der nicht gasförmigen Reaktionsprodukte, wobei die Erze zunächst in einer Reduktionskammer vorreduziert und die nicht gasförmigen Reaktionskomponenten in der Schwebe gehalten und im unmittelbaren Anschluß die so vorreduzierten, in der Schwebe befindlichen Erze in einer Schmelzkammer nachreduziert, die Reduktionsprodukte geschmolzen und durch Schwer- oder Zentrifugalkraft abgeschieden werden.Process for iron extraction from suspended, dusty or fine-grained iron ores by means of fuels in a fine degree of distribution above the melting point of the non-gaseous reaction products The main patent 1086 256 protects a process for iron extraction from dusty or fine-grained Iron ores by means of fuels in a fine degree of distribution above the melting point of the non-gaseous reaction products, the ores initially in a reduction chamber pre-reduced and the non-gaseous reaction components kept in suspension and in the immediate connection those pre-reduced in this way, which are in suspension Ores are re-reduced in a melting chamber, the reduction products are melted and separated by gravity or centrifugal force.
Nach dem Hauptpatent ist ferner vorgeschlagen, die flüssigen Reaktions- und Schmelzprodukte der Schmelzkammer durch ein über die Schmelztemperatur derselben, vorzugsweise durch Einblasen eines Teiles des Verbrennungsmediums, erhitztes Koksbett zu leiten.According to the main patent, it is also proposed that the liquid reaction and melting products of the melting chamber by a device above the melting temperature of the same, preferably by blowing in part of the combustion medium, heated coke bed to direct.
Auch ist im Hauptpatent bereits offenbart worden, dem Koksbett außer Koks oder koksbildender Kohle Stoffe beizugeben, die der Reinigung oder Anreicherung der metallischen und/oder Schlackenphase dienen (Ca O, Si 02, A12 0s oder Cr. 03).It has also already been disclosed in the main patent, except for the coke bed Add coke or coke-forming coal substances that are used for purification or enrichment serve the metallic and / or slag phase (Ca O, Si 02, A12 0s or Cr. 03).
Es wurde nun festgestellt, daß die Reaktionen in dem Reaktionsbett dann besonders schnell und wirkungsvoll ablaufen, wenn erfindungsgemäß außer den Produkten der Schmelzkammer die Kohle und die übrigen dem im wesentlichen hocherhitzten Koks enthaltenden Reaktionsbett zuzuführenden Bestandteile, wie Kalk u. dgl., vor ihrer Einführung in das Reaktionsbett in einem besonderen Schacht außerhalb des Reaktionsbettes durch Erhitzen bereits einer Trocknung, Schwelung, Kalzinierung und Vorerhitzung unterworfen und so vorbereitet werden.It has now been found that the reactions take place in the reaction bed then run particularly quickly and effectively if, according to the invention, in addition to the Products of the melting chamber the coal and the rest of the essentially highly heated Components such as lime and the like to be fed to the reaction bed containing coke their introduction into the reaction bed in a special shaft outside the Reaction bed by heating already a drying, smoldering, calcination and preheating and so prepared.
Die Vorbereitung der Beschickung von Verhüttungsbestandteilen außerhalb des eigentlichen Reaktionsraumes ist an sich bekannt. So ist z. B. in der deutschen Patentschrift 841060 ein Verfahren beschrieben, bei welchem für einen Verhüttungsschachtofen die Kohle in einem Schwelaufsatz, wie bei Schwelgeneratoren, vorbereitet wird.The preparation of the charging of smelting components outside the actual reaction space is known per se. So is z. B. in the German patent 841 060 describes a method in which the coal is prepared in a smoldering attachment, as in smoldering generators, for a smelting shaft furnace.
Von den bekannten Vorschlägen unterscheidet sich das erfindungsgemäße Verfahren dadurch, daß es sich im Gegensatz zum Schachtofenverfahren, bei dem das Gegenstromprinzip vorherrscht, um Reaktionsräume für die Verhüttung handelt, die wie die Schmelzkammer und das Koksbett sich bei einer gleichmäßigen Temperatur befinden.The one according to the invention differs from the known proposals Process in that, in contrast to the shaft furnace process, in which the Countercurrent principle prevails, to reaction spaces for the smelting like the melting chamber and the coke bed are at a uniform temperature.
Ferner besteht ein weiterer Unterschied darin, daß die vorbereiteten Produkte erst in die zweite Stufe des Verhüttungsprozesses eingebracht werden, wobei die Schmelzkammer als die erste Stufe und das Koksbett als die zweite Stufe zu betrachten sind.Another difference is that the prepared Products are only introduced into the second stage of the smelting process, whereby consider the melting chamber as the first stage and the coke bed as the second stage are.
Erfindungsgemäß wird ferner vorgeschlagen, daß die Trocknung, Schwelung, Kalzinierung und Vorerhitzung der in das Reaktionsbett einzuführenden Reaktionsbestandteile durch im an sich bekannten Gegenstrom geführte Heizgase erfolgt, welche dem Reaktionsbett oder einer anderen Stelle der Gesamtapparatur entnommen werden.According to the invention it is also proposed that the drying, smoldering, Calcination and preheating of the reaction components to be introduced into the reaction bed is carried out by the known countercurrent heating gases, which the reaction bed or from another point in the overall apparatus.
Hierdurch wird das Reaktionsbett von einem Wärmeaufwand für die Kohle und die anderen Reaktionsbestandteile wesentlich entlastet, damit die in das Reaktionsbett durch die flüssige Schlacke eingebrachte und durch die Verbrennung mittels eingeblasenem Sauerstoff erzeugte Wärme möglichst vollständig für die endothermen metallurgischen Reaktionen und für die unvermeidbaren Verluste ausgenutzt werden kann.As a result, the reaction bed is relieved of the need for heat for the coal and the other reaction components are significantly relieved, so that those in the reaction bed brought in by the liquid slag and by the incineration by means of blown Oxygen generated heat as completely as possible for the endothermic metallurgical Reactions and for the inevitable losses can be exploited.
Eine Weiterausgestaltung der Erfindung besteht darin, die Vorerhitzung in dem Schacht durch eine Teilverbrennung der Kohle unter Einblasen eines sauerstoffhaltigen Mediums am unteren Ende des Schachtes durchzuführen.A further development of the invention consists in the preheating in the shaft by partially burning the coal while blowing in an oxygen-containing one Medium at the lower end of the shaft.
Während die zuvor beschriebenen Durchführungsformen der Erfindung darin bestehen, die Kohle und die anderen Reaktionsbestandteile des Reaktionsbettes durch Vorerhitzung für die beabsichtigten Re-. aktionen im Reaktionsbett vorzubereiten, besteht eine weitere erfindungsgemäße Maßnahme darin, die Vor= bereitung in Richtung auf eine erhöhte Reaktionsfähigkeit durch eine weitgehende Dispergierung der Kohle bzw. der" anderen in das Reaktionsbett einzuführenden Reaktionsbestandteile in der zu behandelnden Schlacke zu ermöglichen. Zu_ diesem Zweck werden die Kohle bz.# clie"änderen` Bestandteile in staubförmigem bzw. :feinkörnigem- Zustand angewandt. Die Verteilung in - der flüssigen Schlacke erfolgt vorteilhaft durch'emett in diese einzublasenden Gasstrom. =Normalerweise wild - die'- staubförmige Kohle gemeinsam mit der-Verbrennungsluft in das Schlackenbad eingeblasen.While the embodiments of the invention described above consist of the coal and the other reaction components of the reaction bed by Preheating for the intended re. prepare actions in the reaction bed, Another measure according to the invention is the preparation in the direction of to an increased reactivity through extensive dispersion of the coal or the "other reaction components to be introduced into the reaction bed in the allow slag to be treated. For this purpose, the coal or # The "change" components in a dusty or: fine-grained state are used. The distribution in the liquid slag takes place advantageously through emett into it gas flow to be injected. = Usually wild - the'- dusty coal in common blown into the slag bath with the combustion air.
Es sind früher schon Vorschläge gemacht worden, Kohlenstaub und Erzstaub mit dem Verbrennungsmedium gemeinsam in ein Schlackenbad einzublasen. Hierbei mußte der Erzstaub in dem Reaktionsbett geschmolzen und auf entsprechend hohe Temperatur gebracht werden. Diese Maßnahme verursachte aber einen sehr hohen Wärmebedarf eines solchen Reaktionsbettes. Es ist leicht einzusehen, daß das erfindungsgemäße Verfahren gegenüber dem bekannten dadurch überlegen ist, daß es den großen Wärmebedarf für das Einschmelzen und unter Umständen die Vorreduktion des Erzstaubes außerhalb des Reaktionsbettes in einer besonderen Schmelzkammer aufbringt.Proposals have been made before, coal dust and ore dust blown together with the combustion medium into a slag bath. Here had to the ore dust is melted in the reaction bed and at a correspondingly high temperature to be brought. However, this measure caused a very high heat requirement such reaction bed. It is easy to see that the inventive method is superior to the known in that it is the large heat demand for the melting and, under certain circumstances, the pre-reduction of the ore dust outside the Reaction bed applies in a special melting chamber.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW11930A DE1122564B (en) | 1953-08-18 | 1953-08-18 | Process for iron extraction from suspended, dusty or fine-grained iron ores by means of fuels in a fine degree of distribution above the melting point of the non-gaseous reaction products |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW11930A DE1122564B (en) | 1953-08-18 | 1953-08-18 | Process for iron extraction from suspended, dusty or fine-grained iron ores by means of fuels in a fine degree of distribution above the melting point of the non-gaseous reaction products |
Publications (1)
Publication Number | Publication Date |
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DE1122564B true DE1122564B (en) | 1962-01-25 |
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DEW11930A Pending DE1122564B (en) | 1953-08-18 | 1953-08-18 | Process for iron extraction from suspended, dusty or fine-grained iron ores by means of fuels in a fine degree of distribution above the melting point of the non-gaseous reaction products |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0063924A2 (en) * | 1981-04-28 | 1982-11-03 | Kawasaki Steel Corporation | Methods for melting and refining a powdery ore containing metal oxides and apparatuses for melt-refining said ore |
EP0297167A1 (en) * | 1987-06-30 | 1989-01-04 | Kawasaki Steel Corporation | Method and apparatus for producing molten metal from powder state ore |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR585640A (en) * | 1924-09-11 | 1925-03-04 | Method and apparatus for treating ores and in particular iron ores for the manufacture of pig iron | |
DE418101C (en) * | 1923-03-21 | 1925-08-27 | Anton Schreger | Process for the utilization of gout dust, gravel or other ferrous substances |
DE419068C (en) * | 1924-02-12 | 1925-09-19 | Anton Schreger | Process for the utilization of gout dust, gravel or other ferrous substances |
DE431326C (en) * | 1923-05-09 | 1926-07-03 | Jacob G Aarts | Process and furnace for the extraction of pig iron |
CH125525A (en) * | 1925-11-28 | 1928-04-16 | Torvald Gustafsson Emil Gustaf | Process for the production of iron and iron alloys. |
US2066665A (en) * | 1934-07-18 | 1937-01-05 | Thaddeus F Baily | Process for the treatment of ores containing iron |
FR811721A (en) * | 1936-01-07 | 1937-04-21 | Method and device for the reduction of ores, and in particular of iron ore | |
US2544697A (en) * | 1946-12-31 | 1951-03-13 | Standard Oil Dev Co | Blast furnace operation |
US2581597A (en) * | 1947-10-24 | 1952-01-08 | Nissim Raoul | Process for the reduction of iron ores and the like by carbon |
DE841060C (en) * | 1943-11-14 | 1952-06-13 | Basf Ag | Device for refining ores |
DE846553C (en) * | 1949-01-01 | 1952-08-14 | Roman Dipl-Ing Rummel | Method and device for the extraction of metals, in particular pig iron |
-
1953
- 1953-08-18 DE DEW11930A patent/DE1122564B/en active Pending
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE418101C (en) * | 1923-03-21 | 1925-08-27 | Anton Schreger | Process for the utilization of gout dust, gravel or other ferrous substances |
DE431326C (en) * | 1923-05-09 | 1926-07-03 | Jacob G Aarts | Process and furnace for the extraction of pig iron |
DE419068C (en) * | 1924-02-12 | 1925-09-19 | Anton Schreger | Process for the utilization of gout dust, gravel or other ferrous substances |
FR585640A (en) * | 1924-09-11 | 1925-03-04 | Method and apparatus for treating ores and in particular iron ores for the manufacture of pig iron | |
CH125525A (en) * | 1925-11-28 | 1928-04-16 | Torvald Gustafsson Emil Gustaf | Process for the production of iron and iron alloys. |
US2066665A (en) * | 1934-07-18 | 1937-01-05 | Thaddeus F Baily | Process for the treatment of ores containing iron |
FR811721A (en) * | 1936-01-07 | 1937-04-21 | Method and device for the reduction of ores, and in particular of iron ore | |
DE841060C (en) * | 1943-11-14 | 1952-06-13 | Basf Ag | Device for refining ores |
US2544697A (en) * | 1946-12-31 | 1951-03-13 | Standard Oil Dev Co | Blast furnace operation |
US2581597A (en) * | 1947-10-24 | 1952-01-08 | Nissim Raoul | Process for the reduction of iron ores and the like by carbon |
DE846553C (en) * | 1949-01-01 | 1952-08-14 | Roman Dipl-Ing Rummel | Method and device for the extraction of metals, in particular pig iron |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0063924A2 (en) * | 1981-04-28 | 1982-11-03 | Kawasaki Steel Corporation | Methods for melting and refining a powdery ore containing metal oxides and apparatuses for melt-refining said ore |
EP0063924A3 (en) * | 1981-04-28 | 1983-02-09 | Kawasaki Steel Corporation | Methods for melting and refining a powdery ore containing metal oxides and apparatuses for melt-refining said ore |
EP0297167A1 (en) * | 1987-06-30 | 1989-01-04 | Kawasaki Steel Corporation | Method and apparatus for producing molten metal from powder state ore |
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