DE440099C - Process for the production of pig iron from dusty ores in a blast furnace - Google Patents
Process for the production of pig iron from dusty ores in a blast furnaceInfo
- Publication number
- DE440099C DE440099C DEK91843D DEK0091843D DE440099C DE 440099 C DE440099 C DE 440099C DE K91843 D DEK91843 D DE K91843D DE K0091843 D DEK0091843 D DE K0091843D DE 440099 C DE440099 C DE 440099C
- Authority
- DE
- Germany
- Prior art keywords
- furnace
- blast furnace
- production
- pig iron
- coke
- 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
Links
- 238000000034 method Methods 0.000 title claims description 10
- 229910000805 Pig iron Inorganic materials 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000571 coke Substances 0.000 claims description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 5
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011287 low-temperature tar Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Description
Verfahren zur Erzeugung von Roheisen aus staubförmigen Erzen im Hochofen. In einem senkrechten Schacht aus feuerfesten Steinen werden von oben staubförmige Erze, staubförmiger Kalkstein und staubförmiger Koks, herrührend von der Tieftemperaturteergewin.nung, aufgegeben. Es ist bekannt, für die Gewinnung von Eisen von staubförmigem Erz und Brennstoff auszugehen. Bei diesem Verfahren werden die zu reduzierenden Erze und das Reduktionsmittel an einer Stelle oben in den Ofen gebracht, die Luft wird tangential in den Ofen eingeblasen, durchläuft den Ofen von oben nach unten in enger werdenden Spiralzügen und verläßt ihn unten durch eine mittlere Abzugsöffnung. Dadurch soll erreicht werden, daß der Luft- und Gasstrom das pulverförmige Erz im Wirbel mit sich herumreißt und so längere Zeit findet, inniger mit dem Erz in Berührung zu kommen, als es beim freien Fall im Ofen möglich wäre. Dieses Verfahren hat aber den NK achteil, daß der Ofen unten, wo er am heißesten gehen soll, kalt geht, so daß das Verfahren überhaupt nur anwendbar ist, wenn der Ofen unten besonders geheizt wird. Die hierzu notwendige Wärme wird dadurch erzeugt, daß durch neue Luftzufuhr in der Mitte des Ofens eine Verbrennung des Brennstoffes stattfindet.Process for the production of pig iron from powdered ores in a blast furnace. In a vertical shaft made of refractory bricks, dust-shaped Ores, powdered limestone and powdery coke resulting from low temperature tar extraction, given up. It is known for the extraction of powdered ore and iron Running out of fuel. In this process, the ores to be reduced and the reducing agent is brought into the furnace at one point, the air becomes tangential blown into the furnace, passes through the furnace from top to bottom in narrowing Spirals and leaves it at the bottom through a central vent. This is supposed to can be achieved that the air and gas flow with the powdery ore in the vortex turns around and thus finds himself in more intimate contact with the ore for a longer period of time come than would be possible with free fall in the oven. But this procedure has the NK disadvantage that the stove goes cold downstairs, where it is supposed to go hottest, so that the process is only applicable at all if the oven is specially heated below will. The heat required for this is generated by a new supply of air the fuel is burned in the middle of the furnace.
Demgegenüber unterscheidet sich das Verfahren nach der Erfindung dadurch, daß es die bewährten Prinzipien des Hochofens beibehält. Es wird also das Erz mit der Hauptmenge des Kokses oben in den Ofen gebracht, der Wind dagegen unten eingeführt. Durch die Wahl des staubförmigen Erzes kann der Gang des Hochofens beherrscht werden, was bei verschiedener Körnung und dichter Lagerung des Erzes erschwert wird. Außerdem findet die Reduktion des Eisenerzes nur durch Kohlenoxyd, also indirekt statt, ein Vorgang, durch den große Mengen an Koks erspart werden. Ferner müssen der Wind oder das Kohlenoxyd- sich nicht gewaltsam durch die Möllersäule von über 2o m Höhe hindurcharbeiten. Die Schonung der Ofenwände, die Verringerung der Druckbeanspruchung des Ofens und damit eine Verbilligung der Herstellung sind weitere Vorteile. Der Ofen wird so hoch gemacht, daß das aufsteigende Kohlenoxyd Zeit hat, das staubförmige Erz während seines Fallens zu reduzieren,. so daß es unten nur noch zwecks leichter Befreiung von Schlacke geschmolzen wird. Außerdem kann das Gas, falls es oben im Ofen stark kohlenoxy dhaltig ist, unten wieder eingeblasen werden, damit der Koksverbrauch des Ofens noch weiter heruntergedrückt wird. Unten wird mit der Gebläseluft Kohlenstaub eingeblasen, aber nur soviel als nötig ist, tun die Schmelztemperatur in diesem unteren Teil des Hochofens zu erreichen. Der Ofen geht in den höheren Schichten ziemlich kalt und vermeidet dadurch Abkühlungs- und Ausstrahlungsvefluste möglichst.In contrast, the method according to the invention differs in that that it retains the tried and tested principles of the blast furnace. So it will be the ore with The bulk of the coke was brought into the furnace at the top, while the wind was brought in at the bottom. The passage of the blast furnace can be controlled by the choice of the powdery ore, which is made more difficult with different grain sizes and dense storage of the ore. aside from that the reduction of the iron ore takes place only through carbon oxide, that is, indirectly Process by which large amounts of coke are saved. Furthermore, the wind or Do not force the carbon dioxide to work your way through the Möll column from a height of over 20 m. The protection of the furnace walls, the reduction of the pressure load on the furnace and thus a cheaper production are further advantages. The stove will be like this made high so that the rising carbon monoxide has time, the powdery ore during to reduce its fall. so that it is below only for the purpose of easy liberation is melted by slag. Also, the gas can be strong if it is up in the oven carbon oxy dhaltig is to be blown in again below, so that the coke consumption of the oven is pushed down even further. At the bottom, the blown air is used to generate coal dust blown in, but only as much as is necessary, do the melting temperature in this to reach the lower part of the blast furnace. The furnace goes in the higher layers quite cold and thereby avoids cooling and radiation loss as much as possible.
Der Vorgang spielt sich demnach so ab: In den Schacht wird unten die Gebläseluft gemischt mit staubförmigem Koks eingeblasen. Unterhalb dieser Stelle werden in der üblichen Weise flüssige Schlacke und flüssiges Roheisen abgezogen. Die mit Koks vermischte Luft verbrennt den Koks bei der im Schacht herrschenden Temperatur zu Kohlenoxyd. Das Kohlenoxyd steigt empor, erwärmt den herabfallenden Erz- und Koksstaub und reduziert im Verein mit dem oben aufgegebenen Koksstaub die ihm entgegenfallenden staubförmigen Eisenerze. Das reduzierte Eisen schmilzt in dein unteren Teile des Schachtofens, insbesondere wenn . der Wind vorgewärmt wird. Die aus dem oberen Teil des Schachtes entweichenden Gichtgase enthalten noch Kohlenoxyd und können daher unmittelbar wieder unten in den Schacht eingeblasen werden.The process therefore takes place as follows: The Blown air mixed with powdered coke. Below this point liquid slag and liquid pig iron are withdrawn in the usual way. The mixed with coke Air burns the coke in the shaft prevailing temperature to carbon dioxide. The carbon dioxide rises, warms it up falling ore and coke dust and reduced in conjunction with the above Coke dust, the powdery iron ores falling against it. The reduced iron melts in your lower parts of the shaft furnace, especially when. the wind preheated will. The furnace gases escaping from the upper part of the shaft still contain Carbon oxide and can therefore be blown straight back down into the shaft will.
Der Ofen ist in der Zeichnung schematisch dargestellt.The furnace is shown schematically in the drawing.
Durch die Fördervorrichtungen a wird das Erz mit dem Kalkstein und Koks in staubförmigem Zustand an den Hochofen herangebracht und durch die, Röhren b ins Innere geschüttet. Die mit staubförtnigem Koks gemischte Luft wird unten durch die öffnungen c in den Ofen eingeblasen. Unterhalb der Düsen c befindet sich das Stichloch d zum Abzug der flüssigen Schlacke und des flüssigen Roheisens e. Die Gichtgase entweichen oben durch das Abzugsrohr f.Through the conveyors a the ore is with the limestone and Coke in a powdery state brought to the furnace and through the pipes b poured inside. The air, mixed with dusty coke, flows through below the openings c are blown into the furnace. Below the nozzles c is the Tap hole d for drawing off the liquid slag and the liquid pig iron e. the Blast furnace gases escape at the top through the exhaust pipe f.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK91843D DE440099C (en) | 1924-11-15 | 1924-11-15 | Process for the production of pig iron from dusty ores in a blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK91843D DE440099C (en) | 1924-11-15 | 1924-11-15 | Process for the production of pig iron from dusty ores in a blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE440099C true DE440099C (en) | 1927-01-24 |
Family
ID=7237225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEK91843D Expired DE440099C (en) | 1924-11-15 | 1924-11-15 | Process for the production of pig iron from dusty ores in a blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE440099C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1029356B (en) * | 1956-08-15 | 1958-05-08 | Mannesmann Ag | Process for lowering the reduction temperature of metal oxides for the production of metal powders |
| DE1048030B (en) * | 1948-10-20 | 1958-12-31 | Boehler & Co Ag Geb | Process for the production of metals or metal alloys from fine-grained, metal-containing substances |
| DE1086256B (en) * | 1952-07-23 | 1960-08-04 | Werner Wenzel Dr Ing | Process and device for iron extraction from dust-like 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 |
-
1924
- 1924-11-15 DE DEK91843D patent/DE440099C/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1048030B (en) * | 1948-10-20 | 1958-12-31 | Boehler & Co Ag Geb | Process for the production of metals or metal alloys from fine-grained, metal-containing substances |
| DE1086256B (en) * | 1952-07-23 | 1960-08-04 | Werner Wenzel Dr Ing | Process and device for iron extraction from dust-like 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 |
| DE1029356B (en) * | 1956-08-15 | 1958-05-08 | Mannesmann Ag | Process for lowering the reduction temperature of metal oxides for the production of metal powders |
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