EP2641981B1 - Verfahren zur herstellung von geschmolzenem eisen - Google Patents
Verfahren zur herstellung von geschmolzenem eisen Download PDFInfo
- Publication number
- EP2641981B1 EP2641981B1 EP11842354.0A EP11842354A EP2641981B1 EP 2641981 B1 EP2641981 B1 EP 2641981B1 EP 11842354 A EP11842354 A EP 11842354A EP 2641981 B1 EP2641981 B1 EP 2641981B1
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- EP
- European Patent Office
- Prior art keywords
- iron
- compacted iron
- temperature
- compacted
- smelting 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.)
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 562
- 229910052742 iron Inorganic materials 0.000 title claims description 275
- 238000004519 manufacturing process Methods 0.000 title claims description 59
- 238000000034 method Methods 0.000 title claims description 8
- 238000003723 Smelting Methods 0.000 claims description 60
- 239000003245 coal Substances 0.000 claims description 17
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 48
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 239000001569 carbon dioxide Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
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
- C21B13/0006—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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
- C21B13/143—Injection of partially reduced ore into a molten bath
Definitions
- the present invention relates to a method for manufacturing molten iron and, more particularly, to a method for manufacturing molten iron which is capable of performing molten iron work stably and efficiently by using a high-temperature compacted iron storage tank.
- an apparatus for manufacturing molten iron which includes a multi-stage fluidized furnace and a multi-stage smelting furnace and directly uses fine or lump coal and fine iron-containing ores, if reducing gas is not sufficiently supplied from the smelting furnace to the multi-stage fluidized furnace, the formation of a fluidized bed is impossible, thereby making iron work impossible.
- the above condition is generated when a sufficient amount of reducing gas for the multi-stage fluidized furnace is not supplied from the smelting furnace, that is, when a work is started or stopped, and is also generated when the amount of reducing gas generated is reduced due to a reduction of the smelting furnace attributable to smelting furnace work and equipment obstacles.
- an interruption in the high-temperature reduced iron supplied to the smelting furnace is also generated when equipment for the multi-stage fluidized furnace or a high-temperature compacting apparatus fails. If the supply of the high-temperature compacted iron to the smelting furnace is stopped, the amount of heat necessary to melt the reduced iron in the smelting furnace remains.
- the smelting furnace is overheated, and smelting furnace work must be stopped.
- an additional iron source must be directly supplied to the smelting furnace.
- the additional iron source must be lump reduced iron because it has to be directly supplied to the smelting furnace. Accordingly, lump reduced iron is externally supplied in a conventional apparatus for manufacturing molten iron that directly uses fine or lump coal and ores containing fine iron ores.
- the externally supplied lump reduced iron is more expensive than high-temperature reduced iron manufactured through a fluidized furnace, and it also increases a work cost for the apparatus for manufacturing molten iron. Furthermore, since the externally supplied lump reduced iron must be used in a room temperature state, amount of heat for a temperature rise in the externally supplied lump reduced iron is greater than that in the high-temperature reduced iron, thereby increasing the amount of coal necessary within the smelting furnace. As a result, a molten iron yield versus a design capacity is increased, and thus the productivity of the conventional apparatus for manufacturing molten iron that directly uses fine or lump coal and fine iron-containing ores is deteriorated.
- CN 1842605 A and US2006/162499 A1 each disclose an apparatus for manufacturing molten iron comprising a fluidized bed furnace for converting fine iron ores into reduced fine iron by reducing fine iron ores; a compacted iron manufacturing device for manufacturing high-temperature compacted iron by compressing the reduced fine iron; a crushing device for crushing the high-temperature compacted iron; a first conveyance device for conveying the crushed, high-temperature compacted iron; a smelting furnace for melting the compacted iron by combusting fine or lump coal; a compacted iron storage tank for storing some crushed, high-temperature compacted iron; a second conveyance device for conveying the high-temperature compacted iron to the compacted iron storage tank; a 2-direction chute disposed under the crushing device; and a discharge device provided under the compacted iron storage tank and configured to convey the compacted iron away from the compacted iron storage tank.
- the present invention has been made in an effort to provide a method for manufacturing molten iron having an advantage of increasing the stability and efficiency of a molten iron manufacturing process by manufacturing excess high-temperature compacted iron when normal work is performed, storing the excess high-temperature compacted iron in a compacted iron storage tank, and charging the stored compacted iron into a multi-stage smelting furnace when an abnormal work is performed in an apparatus for manufacturing molten iron using a multi-stage fluidized furnace and the multi-stage smelting furnace.
- an apparatus for manufacturing molten iron including a multi-stage fluidized furnace for converting fine iron ores into reduced fine iron by reducing fine iron ores, at least one compacted iron manufacturing device for manufacturing high-temperature compacted iron by compressing the reduced fine iron, at least one crushing device for crushing the high-temperature compacted iron at a specific granularity, a first conveyance device for conveying the crushed high-temperature compacted iron, at least one compacted iron storage tank for storing some of the crushed high-temperature compacted iron, a second conveyance device for conveying the crushed high-temperature compacted iron to the compacted iron storage tank, a third conveyance device, and a smelting furnace for melting the conveyed high-temperature compacted iron by combusting fine or lump coal and supplying reducing gas generated within the smelting furnace to the multi-stage fluidized furnace, wherein 2-direction chutes are disposed under the at least one crushing device, first outlets of the 2-direction
- a nitrogen supply pipe is disposed at the bottom of the compacted iron storage tank.
- gas discharge pipes are disposed at the top of the compacted iron storage tank.
- the gas discharge pipes are equipped with respective pressure control valves and configured to maintain pressure within the compacted iron storage tank higher than atmospheric pressure.
- the apparatus for manufacturing molten iron further includes a carbon dioxide removal device for ramifying some exhaust gas discharged from the multi-stage fluidized furnace, removing carbon dioxide from the ramified exhaust gas, adding the exhaust gas to the reducing gas supplied from the smelting furnace, and supplying the added reducing gas to the multi-stage fluidized furnace.
- the apparatus for manufacturing molten iron further includes a gas circulation cooling device for controlling temperature of reducing gas supplied to the multi-stage fluidized furnace by ramifying some reducing gas generated from the smelting furnace, cooling the ramified reducing gas, and circulating the reducing gas supplied from the smelting furnace again.
- An exemplary embodiment of the present invention provides a method of manufacturing molten iron, including reducing fine iron ores into reduced fine iron by using the multi-stage fluidized furnace, manufacturing high-temperature compacted iron by compressing the reduced fine iron using the compacted iron manufacturing device, crushing the high-temperature compacted iron by using a crushing device, conveying the crushed compacted iron to a charging device, conveying some of the crushed compacted iron to a compacted iron storage tank, distributing the crushed compacted iron to the charging device or the compacted iron storage tank by using 2-direction chutes, and charging the compacted iron from the charging device into a smelting furnace and melting the charged compacted iron by combusting fine or lump coal wherein if the high-temperature compacted iron necessary for the smelting furnace is able to be manufactured through the multi-stage fluidized furnace, the compacted iron manufacturing device, and the crushing device, excess high-temperature compacted iron exceeding an amount of the high-temperature compacted iron necessary for the
- the time that the high-temperature compacted iron stays in the compacted iron storage tank is 6 hours to 12 hours.
- the manufacturing of molten iron in the smelting furnace can be efficiently performed even when an initial work is performed or the operation of the multi-stage fluidized furnace is stopped due to the occurrence of an equipment obstacle. Accordingly, the productivity of a molten iron manufacturing device that directly uses fine or lump coal and ores containing fine iron can be improved.
- FIG. 1 is a diagram schematically showing the construction of an apparatus for manufacturing molten iron using a compacted iron storage tank capable of storing excess high-temperature compacted iron.
- FIG. 1 is a diagram schematically showing the construction of an apparatus for manufacturing molten iron using a compacted iron storage tank 600 capable of storing excess high-temperature compacted iron.
- fine iron ores are reduced to reduced fine iron by a multi-stage fluidized furnace 100, high-temperature compacted iron is fabricated by compressing the reduced fine iron, and the high-temperature compacted iron is crushed to a specific granularity.
- the crushed high-temperature compacted iron is supplied to a first conveyance device 400 by using 2-direction chutes 700 in order convey the crushed high-temperature compacted iron to a charging device, and excess compacted iron is supplied to a second conveyance device 430 that is additionally provided so that the excess compacted iron is stored in a compacted iron charging tank. Accordingly, when a work is initiated or stopped, when a work obstacle is generated, and/or and when an equipment obstacle is generated, the stored compacted iron is supplied to a smelting furnace 500, thereby preserving the ability to manufacture stable molten iron.
- the apparatus for manufacturing molten iron includes a multi-stage fluidized reduction furnace for converting fine iron ores into reduced fine iron by reducing the fine iron ores, at least one high-temperature compacting apparatus for fabricating high-temperature compacted iron by compressing the reduced fine iron, at least one crushing device 300 for crushing the high-temperature compacted iron at a specific granularity, the first conveyance device 400 for conveying the crushed high-temperature compacted iron, and the smelting furnace 500 for melting the conveyed high-temperature compacted iron by combusting fine or lump coal and supplying reducing gas generated within the smelting furnace to the multi-stage fluidized furnace.
- FIG. 1 illustrates a three-stage fluidized furnace 100, but this is only illustrative.
- the number of fluidized furnaces 100 can be three or more.
- the first stage fluidized furnace 100 preheats fine iron ores
- the second stage fluidized furnace 100 preliminarily reduces the preheated fine iron ores
- the third stage fluidized furnace 100 finally reduces the fine iron ores.
- Secondary materials such as limestone and dolomite, and an additive can also be charged into the multi-stage fluidized furnace 100 in order to prevent a phenomenon in which the fine iron ores are adhered to the inside of the multi-stage fluidized furnace 100 and prevent the reduced fine iron from being broken within the smelting furnace 500.
- lump reduced fine iron is manufactured using a compacted iron manufacturing device 200.
- the compacted iron manufacturing device 200 manufactures compacted iron by compressing the reduced fine iron ores charged therein through a pair of rolls.
- the high-temperature compacted iron manufactured by the compacted iron manufacturing device 200 is crushed to a proper granularity by the crushing device 300 disposed under the compacted iron manufacturing device 200 before the high-temperature compacted iron is charged into the smelting furnace 500.
- the crushed compacted iron is supplied to the first conveyance device 400 through the first outlets of the 2-direction chutes 700 disposed under the crushing device 300.
- the high-temperature compacted iron supplied to the first conveyance device 400 is conveyed to a charging device in order to be charged into the smelting furnace 500 and is continuously charged from the charging device to the smelting furnace 500.
- the smelting furnace 500 manufactures molten iron by melting the high-temperature compacted iron through the combustion of fine coal or compacted lump coal.
- the smelting furnace 500 melts the compacted iron by combusting fine or lump coal using oxygen. At this time, reducing gas is generated.
- the smelting furnace 500 supplies the generated reducing gas to the multi-stage fluidized furnace 100 connected to the smelting furnace 500, so that reducing gas for reducing reduced fine iron is supplied to the multi-stage fluidized furnace 100.
- the high-temperature compacted iron is supplied to the second conveyance device 430 disposed under the 2-direction chutes 700 through the second outlets of the 2-direction chutes 700.
- the high-temperature compacted iron is conveyed to and stored in the compacted iron storage tank 600 through the second conveyance device 430.
- the 2-direction chutes 700 are disposed under the at least one crushing device 300.
- the first outlets of the 2-direction chutes 700 supply the crushed high-temperature compacted iron to the first conveyance device 400, and the second outlets of the 2-direction chutes 700 supply the crushed high-temperature compacted iron to the second conveyance device 430.
- Valves are provided in the respective outlets of the 2-direction chutes 700 so that the high-temperature compacted iron can be selectively supplied to the first conveyance device 400 or the second conveyance device 430.
- a nitrogen supply pipe 610 is disposed at the lower part of the compacted iron storage tank 600, and gas discharge pipes 630 are disposed at the top of the compacted iron storage tank 600.
- the gas discharge pipes 630 include respective pressure control valves 635 for maintaining pressure within the compacted iron storage tank 600 higher than atmospheric pressure.
- the nitrogen supply pipe 610 disposed at the lower part of the compacted iron storage tank 600 supplies nitrogen
- the gas discharge pipes 630 disposed at the top of the compacted iron storage tank 600 discharges gas.
- the pressure control valves 635 included in the gas discharge pipes 630 maintain pressure within the compacted iron storage tank 600 higher than atmospheric pressure so that the inflow of air from the outside can be minimized.
- the compacted iron storage tank 600 further includes a level system for detecting the amount of compacted iron charged therein.
- the level system continuously measures the height of a high-temperature compacted iron layer formed within the compacted iron storage tank 600. Accordingly, compacted iron exceeding the capacity of the compacted iron storage tank 600 can be prevented from being supplied to the compacted iron storage tank 600.
- the level system can detect the amount of high-temperature compacted iron stored in the compacted iron storage tank 600.
- the apparatus for manufacturing molten iron further includes a third conveyance device 450.
- Discharge apparatuses 660 are disposed at the bottom of the compacted iron storage tank 600 and configured to supply compacted iron to the third conveyance device 450.
- the third conveyance device 450 conveys the compacted iron to the first conveyance device 400.
- the apparatus for manufacturing molten iron can further include an exhaust gas reforming apparatus 800 for cooling gas discharged from the multi-stage fluidized furnace 100 via a water collector, ramifying some of the discharged gas, removing carbon dioxide from the ramified gas by compressing the ramified gas, mixing the ramified gas with high-temperature reducing gas discharged from the smelting furnace 500, and additionally supplying the mixed reducing gas to the multi-stage fluidized furnace 100.
- an exhaust gas reforming apparatus 800 for cooling gas discharged from the multi-stage fluidized furnace 100 via a water collector, ramifying some of the discharged gas, removing carbon dioxide from the ramified gas by compressing the ramified gas, mixing the ramified gas with high-temperature reducing gas discharged from the smelting furnace 500, and additionally supplying the mixed reducing gas to the multi-stage fluidized furnace 100.
- the temperature of the high-temperature reducing gas can be primarily cooled by mixing room-temperature carbon dioxide removal gas supplied from the exhaust gas reforming apparatus 800 with high-temperature reducing gas discharged from the smelting furnace 500.
- the apparatus for manufacturing molten iron can further include a gas circulation cooling device 900 for ramifying some of the high-temperature reducing gas mixed with the carbon dioxide removal gas, cooling the ramified reducing gas via the water collector, compressing the cooled reducing gas, and mixing the compressed reducing gas with the high-temperature reducing gas so that a temperature of the mixed reducing gas is additionally cooled to temperature of the reducing gas supplied to the multi-stage fluidized furnace 100.
- a gas circulation cooling device 900 for ramifying some of the high-temperature reducing gas mixed with the carbon dioxide removal gas, cooling the ramified reducing gas via the water collector, compressing the cooled reducing gas, and mixing the compressed reducing gas with the high-temperature reducing gas so that a temperature of the mixed reducing gas is additionally cooled to temperature of the reducing gas supplied to the multi-stage fluidized furnace 100.
- a method of manufacturing molten iron in accordance with an exemplary embodiment of the present invention includes the steps of reducing fine iron ores into reduced fine iron by using the multi-stage fluidized furnace 100, manufacturing high-temperature compacted iron by compressing the reduced fine iron by using the compacted iron manufacturing device 200, crushing the high-temperature compacted iron by using the crushing device 300, conveying the crushed compacted iron to the charging device, charging the compacted iron from the charging device into the smelting furnace 500, and melting the charged compacted iron by combusting fine or lump coal.
- the method of manufacturing molten iron further includes the step of conveying some of the crushed compacted iron to the compacted iron storage tank 600.
- the method of manufacturing molten iron further includes the step of distributing the crushed compacted iron to the charging device or the compacted iron storage tank 600 by using the 2-direction chutes 700.
- molten iron is normally continuously manufactured, that is, if high-temperature compacted iron necessary for the smelting furnace 500 can be manufactured through the multi-stage fluidized furnace 100, the compacted iron manufacturing device, and the crushing device 300, excess high-temperature compacted iron that exceeds the amount of the high-temperature compacted iron necessary for the smelting furnace 500 is manufactured.
- the excess high-temperature compacted iron intermittently discharges the high-temperature compacted iron from the crushing device 300 to the conveyance device by way of an action of the 2-direction chutes 700, so the high-temperature compacted iron can be conveyed to and stored in the compacted iron storage tank 600.
- molten iron in the method of manufacturing molten iron, if molten iron is not normally manufactured, that is, if high-temperature compacted iron necessary for the smelting furnace 500 may not be manufactured through the multi-stage fluidized furnace 100, the compacted iron manufacturing device, and the crushing device 300, compacted iron stored in the compacted iron storage tank 600 is discharged to the third conveyance device 450 via the discharge devices 660 and the third conveyance device 450 conveys the discharged compacted iron to the first conveyance device 400. Accordingly, high-temperature compacted iron necessary for the smelting furnace 500 can be continuously supplied.
- a yield of high-temperature compacted iron manufactured through the multi-stage fluidized furnace 100, the compacted iron manufacturing device 200, and the crushing device 300 must exceed demand quantity of high-temperature compacted iron necessary for the smelting furnace 500.
- Equipment capacity excess rate yield of high-temperature compacted iron / demand quantity of high-temperature compacted iron ⁇ 100
- the equipment capacity excess rate can be 110% to 120%.
- the range of the equipment capacity excess rate is based on that a ratio of the time during which an abnormal condition occurs in the entire operation time is about 80% to 90% in an apparatus for manufacturing molten iron that directly uses fine or lump coal and fine iron-containing ores.
- the reducing gas necessary for the multi-stage fluidized furnace 100 in order to manufacture the high-temperature compacted iron can be additionally supplied through a carbon dioxide removal device.
- the time that the high-temperature compacted iron stays in the compacted iron storage tank 600 can be 6 hours to 12 hours.
- high-temperature compacted iron may be stored in the compacted iron storage tank 600 excessively long. In this case, the high-temperature compacted iron can be cooled and may erupt. As a result, in an abnormal condition, the condition of the high-temperature compacted iron supplied to the smelting furnace 500 can be deteriorated.
- high-temperature compacted iron stored at the lower part of the high-temperature compacted iron storage tank 600 may be partially discharged through the discharge devices 660, and the discharged high-temperature compacted iron may be periodically replaced with new high-temperature compacted iron manufactured and discharged through the multi-stage fluidized furnace 100, the compacted iron manufacturing device 200, and the crushing device 300.
- the time that the high-temperature compacted iron is stored in the compacted iron storage tank 600 is regularly maintained through a series of the replacement processes, and the storage time may be 6 hours to 12 hours.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Claims (2)
- Verfahren zum Herstellen von geschmolzenem Eisen, die folgenden Schritte umfassend:Reduzieren von feinen Eisenerzen in reduziertes feines Eisen unter Verwendung eines mehrstufigen Wirbelofens (100);Herstellen eines mit einer hohen Temperatur verdichteten Eisens durch Verdichten des reduzierten feinen Eisens unter Verwendung einer Herstellungsvorrichtung (200) für verdichtetes Eisen;Zerkleinern des mit hoher Temperatur verdichteten Eisens unter Verwendung einer Zerkleinerungsvorrichtung (300);Befördern des zerkleinerten verdichteten Eisens zu einer Beschickungsvorrichtung;Befördern eines Teils des zerkleinerten verdichteten Eisens zu einem Speicherbehälter (600) für verdichtetes Eisen;Verteilen des zerkleinerten verdichteten Eisens an die Beschickungsvorrichtung oder den Speicherbehälter (600) für verdichtetes Eisen unter Verwendung von 2-Richtungs-Rutschen (700); undBeschicken des verdichteten Eisens von der Beschickungsvorrichtung in einen Schmelzofen (500) und Schmelzen des beschickten verdichteten Eisens durch Verbrennen von feiner oder stückiger Kohle,wobei, wenn das für den Schmelzofen (500) notwendige mit hoher Temperatur verdichtete Eisen durch den mehrstufigen Wirbelofen (100), die Herstellungsvorrichtung (200) für verdichtetes Eisen und die Zerkleinerungsvorrichtung (300) hergestellt werden kann, überschüssiges mit hoher Temperatur verdichtetes Eisen, das eine Menge des für den Schmelzofen (500) notwendigen mit hoher Temperatur verdichteten Eisens übersteigt, hergestellt wird, und das überschüssige mit hoher Temperatur verdichtete Eisen intermittierend zu dem Speicherbehälter (600) für verdichtetes Eisen durch eine Aktion der 2-Richtungs-Rutschen (700) befördert und in diesem gespeichert wird,wobei, wenn das für den Schmelzofen (500) erforderliche mit hoher Temperatur verdichtete Eisen nicht durch den mehrstufigen Wirbelofen (100), die Herstellungsvorrichtung (200) für verdichtetes Eisen und die Zerkleinerungsvorrichtung (300) hergestellt werden kann, das in dem Speicherbehälter (600) für verdichtetes Eisen gespeicherte verdichtete Eisen kontinuierlich an den Schmelzofen (500) über eine Beförderungsvorrichtung (450, 400) zugeführt wird,wobei, wenn ein Verhältnis einer Ausbeute an mit hoher Temperatur verdichtetem Eisen, das durch den mehrstufigen Wirbelofen (100), die Herstellungsvorrichtung (200) für verdichtetes Eisen und die Zerkleinerungsvorrichtung (300) hergestellt wird, und der Anforderungsmenge an mit hoher Temperatur verdichtetem für den Schmelzofen (500) erforderlichen Eisen durch eine Überschussrate wie nachfolgend definiert wird,Überschussrate = (Ausbeute des mit hoher Temperatur verdichteten Eisens)/(Anforderungsmenge des mit hoher Temperatur verdichteten Eisens)×100, die Überschussrate 110 % bis 120 % beträgt.
- Verfahren nach Anspruch 1, wobei eine Zeit, in der das mit hoher Temperatur verdichtete Eisen in dem Speicherbehälter (600) für verdichtetes Eisen verbleibt, 6 Stunden bis 12 Stunden beträgt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20100115554A KR101187851B1 (ko) | 2010-11-19 | 2010-11-19 | 용철제조장치 및 이를 이용한 용철제조방법 |
PCT/KR2011/008842 WO2012067462A2 (ko) | 2010-11-19 | 2011-11-18 | 용철제조장치 및 이를 이용한 용철제조방법 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2641981A2 EP2641981A2 (de) | 2013-09-25 |
EP2641981A4 EP2641981A4 (de) | 2017-08-30 |
EP2641981B1 true EP2641981B1 (de) | 2019-06-05 |
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Application Number | Title | Priority Date | Filing Date |
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EP11842354.0A Active EP2641981B1 (de) | 2010-11-19 | 2011-11-18 | Verfahren zur herstellung von geschmolzenem eisen |
Country Status (4)
Country | Link |
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EP (1) | EP2641981B1 (de) |
KR (1) | KR101187851B1 (de) |
CN (2) | CN103221555B (de) |
WO (1) | WO2012067462A2 (de) |
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KR101451405B1 (ko) * | 2012-11-30 | 2014-10-15 | 주식회사 포스코 | 괴성광의 경화장치 및 이를 구비한 용철 제조장치 |
KR101417652B1 (ko) * | 2013-06-24 | 2014-07-08 | 주식회사 포스코 | 유동로의 가스정체층 형성 방지장치 및 방법 |
KR101550893B1 (ko) * | 2013-12-10 | 2015-09-18 | 주식회사 포스코 | 용철제조방법 및 용철제조장치 |
DE102014111906A1 (de) * | 2014-08-20 | 2016-02-25 | Maschinenfabrik Köppern Gmbh & Co. Kg | Anlage zum Heißbrikettieren |
CN107075592B (zh) * | 2014-11-06 | 2020-01-10 | 株式会社Posco | 复合铁水制备装置 |
KR101660696B1 (ko) * | 2015-09-08 | 2016-09-28 | 주식회사 포스코 | 타르 분해 장치, 용철 제조 장치 및 용철 제조 방법 |
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CN86101529A (zh) * | 1983-09-14 | 1988-02-17 | 新西兰钢铁公司 | 铁水的生产 |
JP2002241819A (ja) | 2001-02-09 | 2002-08-28 | Nkk Corp | 微粒鉱石吹込装置 |
US7776136B2 (en) * | 2002-12-21 | 2010-08-17 | Posco | Apparatus for manufacturing molten irons by hot compacting fine direct reduced irons and calcined additives and method using the same |
CN1325666C (zh) * | 2002-12-21 | 2007-07-11 | Posco公司 | 制造铁水的设备及其使用方法 |
KR101118285B1 (ko) * | 2004-10-19 | 2012-03-20 | 주식회사 포스코 | 분환원철 함유 환원체의 괴성체 제조 장치 및 이를 이용한용철제조장치 |
KR101197694B1 (ko) * | 2005-09-12 | 2012-11-05 | 주식회사 포스코 | 분환원철 함유 괴성체 제조 장치 및 이를 구비한용철제조장치 |
KR100939268B1 (ko) * | 2006-08-11 | 2010-01-29 | 주식회사 포스코 | 용철제조장치 및 이를 이용한 용철제조방법 |
KR100797824B1 (ko) * | 2006-12-18 | 2008-01-24 | 주식회사 포스코 | 분상 또는 괴상의 일반탄 및 분상의 철함유 광석을 직접사용하는 용철제조장치 |
CN101260448B (zh) * | 2008-04-24 | 2010-09-29 | 钢铁研究总院 | 一种直接使用精矿粉的熔融还原炼铁方法 |
AT508953B1 (de) * | 2009-10-16 | 2011-07-15 | Siemens Vai Metals Tech Gmbh | Verfahren und vorrichtung zur chargierung in ein einschmelzaggregat |
-
2010
- 2010-11-19 KR KR20100115554A patent/KR101187851B1/ko active IP Right Grant
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2011
- 2011-11-18 EP EP11842354.0A patent/EP2641981B1/de active Active
- 2011-11-18 CN CN201180055721.7A patent/CN103221555B/zh active Active
- 2011-11-18 WO PCT/KR2011/008842 patent/WO2012067462A2/ko active Application Filing
- 2011-11-18 CN CN201510038469.9A patent/CN104694687A/zh active Pending
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Also Published As
Publication number | Publication date |
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KR20120054262A (ko) | 2012-05-30 |
KR101187851B1 (ko) | 2012-10-04 |
CN103221555B (zh) | 2015-07-15 |
WO2012067462A2 (ko) | 2012-05-24 |
WO2012067462A3 (ko) | 2012-08-23 |
EP2641981A2 (de) | 2013-09-25 |
CN103221555A (zh) | 2013-07-24 |
CN104694687A (zh) | 2015-06-10 |
EP2641981A4 (de) | 2017-08-30 |
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