CN101568650A - Apparatus for manufacturing molten iron and method for manufacturing molten iron - Google Patents
Apparatus for manufacturing molten iron and method for manufacturing molten iron Download PDFInfo
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- CN101568650A CN101568650A CNA2007800482318A CN200780048231A CN101568650A CN 101568650 A CN101568650 A CN 101568650A CN A2007800482318 A CNA2007800482318 A CN A2007800482318A CN 200780048231 A CN200780048231 A CN 200780048231A CN 101568650 A CN101568650 A CN 101568650A
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/06—Making spongy iron or liquid steel, by direct processes in multi-storied furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0033—In fluidised bed furnaces or apparatus containing a dispersion of the material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/66—Heat exchange
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2300/00—Process aspects
- C21B2300/02—Particular sequence of the process steps
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
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- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
An apparatus for manufacturing molten iron according to an embodiment of the present invention includes i) at least one fluidized-bed reduction reactor that reduces and plasticizes fine iron; ii) an apparatus for manufacturing compacted iron that molds the fine iron and manufactures compacted iron; iii) a melter-gasifier into which the compacted iron is charged and oxygen is injected; iv) a reducing gas supply line that supplies reducing gas discharged from the melter-gasifier to the fluidized-bed reduction reactor; and v) a fine particle injecting device that injects viscosity reducing materials into the reducing gas such that viscosity of dust contained in the reducing gas is reduced. The melter-gasifier manufactures molten iron.
Description
Technical field
The present invention relates to a kind of device and a kind of method that is used to make molten iron that is used to make molten iron, more specifically relate to a kind of device and a kind of method that is used to use raw coal and fine iron ore manufacturing molten iron that is used to make molten iron.
Background technology
Iron And Steel Industry provides in construction industry and the core industry of required basic material in the production of automobile, boats and ships, home appliances and many other products that our use.Iron And Steel Industry also be progressive jointly with the mankind, have the industry of one of long history.In Iron And Steel Industry, play the part of in the iron work of pivotal player, making molten iron---being the pig iron of molten state---afterwards, make steel and be supplied to the human consumer subsequently by this molten iron with iron ore and coal as raw material.
At present, about in the world 60% iron output is to use the blast furnace process that grows up from 14th century to produce.According to blast furnace process, with the iron ore of experience sintering process with the coke that bituminous coal is made as the raw material blast furnace of packing into together, and supply with oxygen to be iron with iron ore reduction to it, make molten iron thus.
Consider response characteristic, the most universal blast furnace process requires raw material to have the intensity of predetermine level at least and has the granularity that can guarantee ventilation property in stove in molten iron manufactory.For above-mentioned reasons, by handling coke that specific raw coal obtains as carbon source, this carbon source is as fuel and reductive agent.Similarly, the agglomerate of experience stoking processing (agglomerating process) is mainly as source of iron.
Therefore, modern blast furnace method requires raw material preliminary treatment equipment, such as coke manufacturing equipment and sintering equipment.Also promptly, except that blast furnace, also need to be equipped with affiliated facility, also need to have the equipment that is used to prevent and minimize the pollution that produces from affiliated facility.Therefore, have a problem, promptly the great amount of investment to additional facilities and equipment can cause production cost to increase.
In order to solve these problems of blast furnace process, global iron work all is devoted to develop a kind of by directly making fuel and reductive agent and produce the smelting reduction process of molten iron by the thin ore deposit of direct use with raw coal, and thin ore deposit accounts for more than 80% of world's mineral products amount.
Be used for comprising: wherein be formed with the fluid bed reduction reactor of bubble fluidized-bed and wherein be formed with the fusing-vapourizing furnace of coal packed bed according to the device of melting and reducing manufactured molten iron.This fusing-vapourizing furnace is connected to this fluid bed reduction reactor.In this case, with fine iron ore and the additive fluid bed reduction reactor of at room temperature packing into, so that its prereduction.The reducing gas that is used for fluidisation and reduction fine iron ore in the fluid bed reduction reactor produces and is supplied to from fusing-vapourizing furnace.
1000 ℃ or higher high-temperature service are used in top at fusing-vapourizing furnace.Pack in fusing-vapourizing furnace burning of coal, heat differentiation (thermal differentiation) and compress and produced a large amount of dust, and in the heat of direct-reduced iron (direct reduced iron) is broken up, produced a large amount of dust.In this case, though the dust major part that is produced all is absorbed in the coal packed bed, but during the upwelling of the reducing gas that rises from fusing-vapourizing furnace bottom when flowing through, the dust that is produced also can partly enter the fluid bed reduction reactor by the reducing gas supply line.
Yet, owing to have viscosity from the dust that fusing-vapourizing furnace produced, so if dust enters the fluid bed reduction reactor, it will be bonded on the distribution plate or centrifugal scrubber of fluid bed reduction reactor so.Therefore, enter the fluid bed reduction reactor if having strongly adherent dust in a large number, the nozzle of the distribution plate of fluid bed reduction reactor will get clogged so, and the load of the centrifugal scrubber in the fluid bed reduction reactor will increase, and centrifugal scrubber will get clogged.Further, if dust is bonded in the fluid bed reduction reactor on the fluidizing fine iron ore, it can cause unstable running so, such as forming stagnant layer.
Summary of the invention
Technical problem
A kind of device that is used to make molten iron is provided, guaranteeing the operation stability of fluid bed reduction reactor by the viscosity that reduces dust, and in whole process, has improved the productivity and the operation ratio of device.In addition, providing a kind of uses the above-mentioned device that is used to make molten iron to make the method for molten iron.
Technical scheme
The device that is used to make molten iron according to embodiment of the present invention a kind of comprises: at least one fluid bed reduction reactor, and its reduction also plastifies thin iron; Be used to make the device of compacted iron, it makes thin iron moulding and makes compacted iron; Fusing-vapourizing furnace, compacted iron are loaded in this fusing-vapourizing furnace and oxygen is injected in this fusing-vapourizing furnace; The reducing gas supply line, its reducing gas that will discharge from fusing-vapourizing furnace supplies to the fluid bed reduction reactor; And the particulate injection device, it reduces material with viscosity and injects reducing gas, reduces so that be included in the viscosity of the dust in the reducing gas.This fusing-vapourizing furnace is made molten iron.
The device that is used to make molten iron can also comprise: the reducing gas line of flow, and it is connected to the top of fusing-vapourizing furnace; And centrifugal scrubber, reducing gas is fed into this centrifugal scrubber from the reducing gas line of flow that is connected to this centrifugal scrubber.This centrifugal scrubber can be collected the dust in the reducing gas.In addition, the device that is used to make molten iron can also comprise the dust bin, and this dust bin is connected to the bottom of centrifugal scrubber, and stores the dust that is collected in the centrifugal scrubber and with this dust fusing-vapourizing furnace of packing into once more.
The particulate injection device can be connected to the reducing gas line of flow by the gas transmission line, and this gas transmission line reduces material by gas with viscosity and is sent to the reducing gas supply line.This gas transmission line can be connected to the reducing gas line of flow than the nearer position of luxuriant core type fly-ash separator from fusing-vapourizing furnace.
It can be dry coke quenching (CDQ) dust that viscosity reduces material.In addition, to reduce material can be MgO powder, CaO powder or SiO to viscosity
2Powder.
Simultaneously, a kind of method that is used for making molten iron according to the present invention comprises: i) in the reduction of fluid bed reduction reactor with plastify thin iron; Ii) will reduce and compress with the thin iron of plastifying; The thin iron that iii) will the compress fusing-vapourizing furnace of packing into; Iv) the reducing gas that will produce from fusing-vapourizing furnace supplies to the fluid bed reduction reactor; And v) supply to reducing gas by viscosity is reduced material, reduce the viscosity of dust in the reducing gas.
This method that is used to make molten iron can also comprise, uses centrifugal scrubber to collect dust in the reducing gas that produces from the fluid bed reduction reactor.In addition, this method that is used to make molten iron can also comprise, stores collected dust, and with the collected dust fusing-vapourizing furnace of packing into once more.Viscosity can be reduced material is injected between fusing-vapourizing furnace and the centrifugal scrubber.In this case, viscosity can be reduced material is injected at from fusing-vapourizing furnace than the nearer position of luxuriant core type fly-ash separator.
It can be dry coke quenching (CDQ) dust that viscosity reduces material.Dry coke quenching (CDQ) dust can be injected reducing gas, so that the carbon content of this dust is not more than 60%.
In addition, to reduce material can be MgO powder, CaO powder or SiO to viscosity
2Powder.Can inject that viscosity reduces material so that its at the 2wt% of dust in the scope of 10wt%.
Beneficial effect
Because the viscosity of the dust that produces from fusing-vapourizing furnace is suppressed, so the centrifugal scrubber of the nozzle of distribution plate and fluid bed reduction reactor can not get clogged.In addition, suppressed to form stagnant layer above the distribution plate of fluid bed reduction reactor, this stagnant layer is formed by sticky dust.
Description of drawings
Fig. 1 is the explanatory view of device that is used to make molten iron according to one embodiment of the invention.
Fig. 2 is the illustrative inner cross-sectional view strength that has amplified the local I I of Fig. 1.
Embodiment
Explained in detail exemplary of the present invention with reference to the accompanying drawings hereinafter.Only for the present invention is described, the present invention is not limited thereto for embodiment of the present invention.
Fig. 1 schematically shows the device 1000 that is used to make compacted iron according to one embodiment of the invention.Being used to shown in Fig. 1 made the structure of device 1000 of molten iron only for the present invention is described, the present invention is not limited thereto.Therefore, the device 1000 that is used to make molten iron can constitute and may further include other equipment with other structures.
As shown in Figure 1, the device 1000 that is used to make molten iron comprises: as the fluid bed reduction reactor 10 of reduction reactor, the device 20 that is used to store thin iron, the device 30 that is used to make compacted iron, fusing-vapourizing furnace 40, reducing gas supply line 50 and particulate supply arrangement 70.In addition, the device 1000 that is used to make molten iron also comprises: the dust bin 90 that is connected the device 30 that is used to make compacted iron and the high temperature pressure balancing equipment 60 between the fusing-vapourizing furnace 40, is connected to the centrifugal scrubber 80 of fusing-vapourizing furnace 40 and is connected to these centrifugal scrubber 80 bottoms by reducing gas line of flow 82.The device 1000 that is used to make molten iron can also comprise necessary other equipment of molten iron of making.
In a plurality of fluid bed reduction reactors 10 that are connected with each other, be formed with fluidized-bed, to reduce fine iron ore etc.The reducing gas of discharging in the coal packed bed from fusing-vapourizing furnace 40 supplies to each fluid bed reduction reactor 10 by reducing gas supply line 50.
Reducing gas is flowing in the fluid bed reduction reactor 10, and the reduction fine iron ore.In this case, can use additive by additive is mixed with fine iron ore.As shown in Figure 1, fluid bed reduction reactor 10 comprises preheating reduction reactor 10a, the first reduction reactor 10b, the second reduction reactor 10c and final reduction reactor 10d.
Temperature at the reducing gas that burner 12a, 12b and the 12c of the gas temperature that is used for raising will produce from fusing-vapourizing furnace 40 raises, and---to be fed into the heat of recovering damage before fluid bed reduction reactor 10b, 10c except preheating reduction reactor 10a and the 10d at this reducing gas---afterwards, this reducing gas is fed into fluid bed reduction reactor 10.The reducing gas of having flowed through each fluid bed reduction reactor and having discharged from preheating reduction reactor 10a top is subsequently flowed through and is used for collecting by water the wet scrubber 92 of dust, then is discharged from.
As shown in Figure 1, the device 20 that is used to store thin iron is connected to final reduction reactor 10d, store as-reduced thin iron thus, and---it is as-reduced material---is fed to the device 30 that is used to make compacted iron that is installed in device 20 belows with as-reduced thin iron.The device 30 that is used to make compacted iron compresses as-reduced material, to guarantee to melt-ventilation property of vapourizing furnace 40 and prevent that dust from scattering.The device 30 that is used to make compacted iron comprises a pair of cylinder 301 and compacted iron storage bin 303.In case of necessity, the device 30 that is used to make compacted iron can also comprise other equipment.
As shown in Figure 1, bin 60 is made between the device 30 and fusing-vapourizing furnace 40 of compacted iron being used to.Bin 60 reduces compacted iron once more by the reducing gas of supplying with from fusing-vapourizing furnace 40.Therefore, because the compacted iron that is reduced once more is fed into fusing-vapourizing furnace 40, so can reduce greatly to melt-reduction in the vapourizing furnace 40 loads.
By supplying with lump coal (lumped coal) or briquet (coalbriquette), in fusing-vapourizing furnace 40, formed the coal packed bed to fusing-vapourizing furnace 40.Be loaded into the lump coal of fusing-vapourizing furnace 40 or briquet by being gasified with the combustion reactions of oxygen in the pyrolytic reaction in this coal packed bed top and this coal packed bed bottom.Since gasification reaction and from fusing-vapourizing furnace 40 generation reducing gas supply to fluid bed reduction reactor 10 by the reducing gas supply line 50 that is connected to final reduction reactor 10d rear end.This reducing gas is as reductive agent and fluidizing agent.
Centrifugal scrubber 80 is connected to fusing-vapourizing furnace 40 by reducing gas line of flow 82, collects the dust in the reducing gas of discharging from fusing-vapourizing furnace 40 thus.In this case, centrifugal scrubber 80 is connected to reducing gas supply line 50, will supply to fluid bed reduction reactor 10 with the reducing gas of dust separation by reducing gas supply line 50 thus.This reducing gas partly is stored in the bin 60.
Be collected in the dust in the centrifugal scrubber 80 because gravity temporarily is stored in the dust bin 90 that is arranged in centrifugal scrubber 80 belows.This dust is installed in the dust splashing device (not shown) injection of dust bin 90 belows, and then by the fusing-vapourizing furnace 40 of packing into once more.In this case, because the dust of packing into once more is by oxygen combustion and fusing with its injection, so this dust can not spread to the outside of fusing-vapourizing furnace 40 once more.
Particulate injection device 70 is connected to reducing gas line of flow 82 by gas transmission line 72.Particulate injection device 70 reduces material by using gas pressure transmission viscosity and passes gas transmission line 72.The viscosity that transmits by gas reduces the direct top that material is injected into fusing-vapourizing furnace 40.This injected viscosity reduces material and enter centrifugal scrubber 80 after the air-flow along reducing gas line of flow 82 moves.This viscosity reduces material with the mix dust that enters with reducing gas.Though only show single injection position among Fig. 1, because many reducing gas line of flow 82 can be installed, so the number of gas transmission line 72 can equate with the number of reducing gas line of flow 82.
In order to reduce the viscosity of the dust of generation from fusing-vapourizing furnace 40, improve the carbon content in the reducing gas, perhaps can add viscosity and reduce material, for example MgO powder, CaO powder or SiO
2Powder.
At first, in order to improve carbon content, injection dry coke quenching (CDQ) dust.Because the carbon content in the CDQ dust is 85% or more, so if per hour inject 2 tons or more CDQ dust, carbon content is about 40% or more in the so available dust.
If the CDQ dust is used to improve carbon content, along with carbon content raises, the viscosity of dust dies down so.Yet, too high if carbon content becomes, deleterious ratio (difference ratio) will appear between oxygen in the fusing-vapourizing furnace 40 and carbon so.In addition, when the CDQ dust enters fluid bed reduction reactor 10, the forming ability variation of this as-reduced material in the compaction process of as-reduced material.Therefore, the injection volume of control CDQ dust is so that the carbon content in the dust is no more than 60%.
Simultaneously, when using viscosity except that the CDQ dust to reduce material, suppress the appearance in 2% o'clock that amount that viscosity reduces material is no less than the total amount of the dust that is produced that acts on of viscosity.Yet, if viscosity reduces the 10wt% that the amount of material surpasses the total amount of the dust that is produced, the slag that produces in fusing-vapourizing furnace 40 may increase so, and basicity may change, and the forming ability of as-reduced material in its compaction process may variation.Therefore, the viscosity injection volume that reduces material at the 2wt% of the total amount of the dust that is produced in the scope of 10wt%.
Fig. 2 is the illustrative inner cross-sectional view strength that has amplified the local I I of Fig. 1.The viscosity that Fig. 2 schematically shows dust is reduced the state that material reduces by viscosity.As shown in Figure 2, viscosity reduces material 100 and enters reducing gas line of flow 82 by gas transmission line 72.Therefore, because viscosity reduces the viscosity of material 100, dust 200 is bonded at viscosity and reduces on the material 100.
Because the dust 200 that enters fluid bed reduction reactor 10 (as shown in Figure 1, hereinafter same) is in and is bonded at viscosity and reduces state on the material 100, so this dust can not be bonded on the nozzle or centrifugal scrubber of distribution plate, but former state is passed through therefrom.As mentioned above, injection viscosity reduces material 100, and the possibility that is bonded on the fluid bed reduction reactor 10 of dust 200 has just reduced thus.Also promptly, alleviated the problem of viscosity of dust 200.
In this case, when sticky dust 200 and viscosity reduce material 100 and mix unevenly in reducing gas, owing to isolated by the part of injection material, so can not alleviate the problem of viscosity of total dust 200.Therefore, viscosity is reduced material 100 be expelled to one, can in reducing gas line of flow 82, mix with sticky dust 200 fully so that viscosity reduces material 100 as far as possible away from the position of centrifugal scrubber 80.Also promptly, viscosity is reduced the position that material 100 is expelled to approaching as far as possible fusing-vapourizing furnace 40.
Though specifically illustrate and illustrated the present invention with reference to exemplary of the present invention, but it will be understood by those skilled in the art that, under the situation of the spirit and scope of the present invention that do not deviate from incidental claim and limited, can carry out multiple change on form or the details to these embodiments.
Claims (16)
1. device that is used to make molten iron, this device comprises:
At least one fluid bed reduction reactor, its reduction also plastifies thin iron;
Be used to make the device of compacted iron, it makes thin iron moulding and makes compacted iron;
Fusing-vapourizing furnace, compacted iron are loaded in this fusing-vapourizing furnace and oxygen is injected in this fusing-vapourizing furnace, and this fusing-vapourizing furnace is made molten iron;
The reducing gas supply line, it will supply to the fluid bed reduction reactor from the reducing gas that fusing-vapourizing furnace is discharged; And
The particulate injection device, it reduces material with viscosity and injects reducing gas, reduces so that be included in the viscosity of the dust in the reducing gas.
2. the device of claim 1 also comprises:
The reducing gas line of flow, it is connected to the top of fusing-vapourizing furnace;
Centrifugal scrubber, reducing gas is fed into this centrifugal scrubber from the reducing gas line of flow that is connected to this centrifugal scrubber, and this centrifugal scrubber is collected the dust in the reducing gas.
3. the device of claim 2 also comprises the dust bin, and this dust bin is connected to the bottom of described centrifugal scrubber, and stores the dust be collected in the centrifugal scrubber and with this dust fusing-vapourizing furnace of packing into once more.
4. the device of claim 2, wherein said particulate injection device is connected to the reducing gas line of flow by the gas transmission line, and this gas transmission line reduces material by gas with viscosity and is sent to the reducing gas supply line.
5. the device of claim 4, wherein said gas transmission line is being connected to the reducing gas line of flow from fusing-vapourizing furnace than the nearer position of luxuriant core type fly-ash separator.
6. the device of claim 1, it is dry coke quenching (CDQ) dust that wherein said viscosity reduces material.
7. the device of claim 1, it is MgO powder, CaO powder or SiO that wherein said viscosity reduces material
2Powder.
8. method that is used to make molten iron, this method comprises:
Reduction and plastify thin iron in the fluid bed reduction reactor;
To reduce also, the thin iron of plastifying compresses;
With the thin iron that the has compressed fusing-vapourizing furnace of packing into;
The reducing gas that will produce from fusing-vapourizing furnace supplies to the fluid bed reduction reactor; And
Supply to reducing gas by viscosity is reduced material, reduce the viscosity of dust in the reducing gas.
9. the method for claim 8 also comprises and uses centrifugal scrubber to collect dust in the reducing gas that produces from the fluid bed reduction reactor.
10. the method for claim 9 also comprises storing collected dust, and with the collected dust fusing-vapourizing furnace of packing into once more.
11. the method for claim 9 wherein reduces material with described viscosity and is injected between fusing-vapourizing furnace and the centrifugal scrubber.
12. the method for claim 11 wherein reduces described viscosity material and is injected at from fusing-vapourizing furnace than the nearer position of luxuriant core type fly-ash separator.
13. it is dry coke quenching (CDQ) dust that the method for claim 8, wherein said viscosity reduce material.
14. the method for claim 13, wherein said dry coke quenching (CDQ) dust is injected into reducing gas, so that the carbon content of dust is not more than 60%.
15. it is MgO powder, CaO powder or SiO that the method for claim 8, wherein said viscosity reduce material
2Powder.
16. the method for claim 15, inject wherein that described viscosity reduces material so that its at the 2wt% of dust in the scope of 10wt%.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060133655 | 2006-12-26 | ||
| KR10-2006-0133655 | 2006-12-26 | ||
| KR1020060133655A KR100840231B1 (en) | 2006-12-26 | 2006-12-26 | Apparatus and method for manufacturing molten irons |
| PCT/KR2007/006775 WO2008078938A1 (en) | 2006-12-26 | 2007-12-24 | Apparatus for manufacturing molten iron and method for manufacturing molten iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101568650A true CN101568650A (en) | 2009-10-28 |
| CN101568650B CN101568650B (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800482318A Active CN101568650B (en) | 2006-12-26 | 2007-12-24 | Apparatus for manufacturing molten iron and method for manufacturing molten iron |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100840231B1 (en) |
| CN (1) | CN101568650B (en) |
| WO (1) | WO2008078938A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101064992B1 (en) * | 2008-12-30 | 2011-09-16 | 주식회사 포스코 | Apparatus for manufacturing molten irons |
| AT508930B1 (en) | 2010-03-04 | 2011-05-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR PRODUCING PRESS LENGTHS |
| AT510586B1 (en) * | 2011-05-12 | 2012-05-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR DISPERSING DUST PARTICLES FROM A DUST LINE |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2608736B2 (en) * | 1987-12-07 | 1997-05-14 | 川崎重工業株式会社 | Method of charging exhaust gas dust in smelting reduction furnace |
| KR100276346B1 (en) * | 1998-07-28 | 2000-12-15 | 이구택 | A method for reducing the fine iron ore utilizing the device of fluidized bed type |
| EP1397521A2 (en) * | 2001-06-19 | 2004-03-17 | Voest-Alpine Industrieanlagenbau GmbH & Co. | Method and device for treating particulate material |
| UA84305C2 (en) * | 2003-12-05 | 2008-10-10 | Поско | Method and device for obtaining of cast iron melt and hot-rolled steel sheet |
| CN1852995A (en) * | 2003-12-05 | 2006-10-25 | Posco公司 | An apparatus for manufacturing a molten iron directly using fine or lump coals and fine iron ores, the method thereof, the integrated steel mill using the same and the method thereof |
| KR100743189B1 (en) | 2005-12-26 | 2007-07-27 | 주식회사 포스코 | Apparatus and method for manufacturing molten irons |
-
2006
- 2006-12-26 KR KR1020060133655A patent/KR100840231B1/en not_active IP Right Cessation
-
2007
- 2007-12-24 WO PCT/KR2007/006775 patent/WO2008078938A1/en active Application Filing
- 2007-12-24 CN CN2007800482318A patent/CN101568650B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101568650B (en) | 2012-03-21 |
| KR100840231B1 (en) | 2008-06-20 |
| WO2008078938A1 (en) | 2008-07-03 |
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