CN106676260A - Device and method for sintering iron ore and internally separating carbon dioxide - Google Patents
Device and method for sintering iron ore and internally separating carbon dioxide Download PDFInfo
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- CN106676260A CN106676260A CN201710131257.4A CN201710131257A CN106676260A CN 106676260 A CN106676260 A CN 106676260A CN 201710131257 A CN201710131257 A CN 201710131257A CN 106676260 A CN106676260 A CN 106676260A
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- iron ore
- reduction
- reaction chamber
- ore
- oxidation reaction
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- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/16—Sintering; Agglomerating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
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- Manufacturing & Machinery (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a device and method for sintering iron ore and internally separating carbon dioxide. Original iron ore powder and blast furnace gas enter an original iron ore reduction reaction chamber for reaction, and reduced ore powder, H2O and CO2 are obtained; reduced ore powder enter a reduction ore oxidation reaction chamber for reaction; air is injected into the reduction ore oxidation reaction chamber; the reduced ore powder and air are oxidized at the high temperature; a large amount of heat dissipated through the oxidation reaction is transferred to the original iron ore reduction reaction chamber through a heat exchanger to provide heat for reduction reaction; CO2 is separated from reduced ore through a separator and captured; and sintered ore produced from the oxidation reaction chamber is discharged through a deslagging outlet.
Description
Technical field
The present invention relates to sintered iron ore and separate CO2Method and apparatus, it is more particularly to a kind of using double-fluidized-bed
Between heat exchange sintered iron ore and to separate CO2The method and apparatus of heat supply.
Background technology
Climate warming in addition to natural cause, also by the industrial revolution over more than 250 years, using a large amount of emission greenhouses of Fossil fuel
The impact of gas.What in December, 2009 passed through《Copenhagen agreement》, adhere to that developed country carries out and force to reduce discharging and developing china
Family takes and independently slow down action for principle.Due to the rapid growth of developing country's greenhouse gas emissions, greenhouse gases are participated in
Reduce discharging or the pressure of the row's of limit promise grows with each passing day.Steel and iron industry by carbon metallurgy based on, the CO of production process2Discharge accounts for global total
The 5%~6% of amount.With the increase of output of steel, reduce CO2 emission has become that China's steel industry is urgently to be resolved hurrily to ask
Topic.Currently, the theme of development of iron ＆ steel industry be efficiently, low-carbon (LC) and green, for successfully manage greenhouse effect and realize society can
Sustainable development, in whole Steel Production Flow Chart, reduces the CO of blast furnace ironmaking process2Discharge becomes the focus of people's research.
In ironmaking processes, CO is efficiently separated and trapped2Not expending excess resource again becomes the key of restriction development of iron ＆ steel industry.Meanwhile,
Side-product, i.e. blast furnace gas can be also produced during blast furnace ironmaking, the 88.7% of iron and steel enterprise's discharge combustible exhaust gas is accounted for, this portion
Gas is divided to be expelled directly out being greatly to waste without any utilization, therefore, it is iron and steel enterprise's section to the effectively utilizes of blast furnace gas
The key that can be lowered consumption.
The content of the invention
Technical problem：It is an object of the invention to provide a kind of sintered iron ore and the inherent device for separating carbon dioxide and side
Method.The present invention is oxidized to former reduction of iron ore fines reaction heat supply using reduction breeze, produces block sintering deposit and efficiently separates CO2,
Have the advantages that to reduce greenhouse gas emission.
Technical scheme：The device of a kind of sintered iron ore of the present invention and inherent separation carbon dioxide is by former iron ore reduction
Reaction fluid bed is constituted with reduced ore oxidation reaction fluid bed；Wherein：
Former iron ore reduction reaction fluid bed includes that former iron ore reduction reative cell, reduction reaction chamber changeover portion, reduction bed are lifted
Pipe, carbon dioxide cyclone separator, tremie pipe, overflow launder, First Heat Exchanger and dispenser；
Reduced ore oxidation reaction fluid bed includes that reduced ore oxidation reaction chamber, oxidation reaction chamber changeover portion, oxidation bed are lifted
Pipe, the second heat exchanger and spiral slag-drip opening；
Reduced ore oxidation reaction chamber in reduced ore oxidation reaction fluid bed is by overflow launder and former iron ore reduction reaction stream
The tremie pipe changed in bed is connected.
In described former iron ore reduction reaction fluid bed, reduce the lower end of bed riser by reduction reaction chamber changeover portion with
Former iron ore reduction reative cell is connected, and the upper end for reducing bed riser is connected with the upper end of carbon dioxide cyclone separator, titanium dioxide
The lower end of carbon cyclone separator is connected by tremie pipe with overflow launder, lower end side and the dispenser phase of former iron ore reduction reative cell
Even, First Heat Exchanger is arranged in around former iron ore reduction reative cell；Blast furnace gas is provided with former iron ore reduction reative cell bottom
Mouthful, carbon dioxide cyclone separator top is provided with carbon dioxide air vent；Isopipe root is provided with loosening air port.
In described reduced ore oxidation reaction fluid bed, the lower end of oxidation bed riser by oxidation reaction chamber changeover portion with
Reduced ore oxidation reaction chamber is connected, and the lower end side of reduced ore oxidation reaction chamber is connected with spiral slag-drip opening, the second heat exchanger arrangement
Around reduced ore oxidation reaction chamber；Air scoop is provided with reduced ore oxidation reaction chamber bottom, oxidation bed riser top sets
There is oxygen debt air exhaust port.
What the interface b between First Heat Exchanger and the second heat exchanger to interface c and interface d to interface a was connected by heat pipe, heat
The sequence of flow of conduction oil is a-b-c-d-a in pipe.
It is passed through the loosening elegance air of isopipe root.
A kind of sintered iron ore of the present invention and inherent separation CO2Method be：Former Iron Ore Powder is sent into by dispenser
In former iron ore reduction reative cell, in the lower end of former iron ore reduction reative cell blast furnace gas is passed through, former Iron Ore Powder by blast furnace gas also
Originally it was the reduction breeze of lower valency, gaseous product is H2O and CO2；It is in fast fluidization due to reducing bed riser, reduces breeze
With H2O and CO2Reduction reaction chamber is left, and reduction bed riser is entered through reduction reaction chamber changeover portion；Through carbon dioxide
Cyclone separator, H2O and CO2Discharge and be captured, condense and isolate and be obtained after water therein pure CO2；Reduced ore
Powder is from carbon dioxide cyclone separator lower end Jing tremie pipes, overflow launder to reduced ore oxidation reaction chamber bottom；Former reduction of iron ore fines
Heat needed for reaction is provided by vigorous oxidation reaction of the breeze in oxidation reaction chamber is reduced.In reduced ore oxidation reaction chamber lower end
Air, reduction breeze and oxygen vigorous oxidation are passed through, heat is discharged, are sintered, generate block sintering deposit, and Jing slag-drip openings are arranged
Go out；The oxidized bed riser of oxygen debt air after burning is discharged；The amount of heat that oxidation bed reative cell is produced is by the second heat exchange
Device, First Heat Exchanger are delivered to reduction reaction chamber, are the reduction reaction heat supply of former Iron Ore Powder, the final sintering for realizing former Iron Ore Powder
And CO2Separation.
Beneficial effect：Compared with prior art, the invention has the advantages that：
(1) method of the present invention and its device can separate CO from former iron mine2And trap.In former iron ore reduction reaction stream
In changing bed, the cross-sectional area of former iron ore reduction reative cell is more than the cross-sectional area for reducing bed riser, the contracting of bed body cross-sectional area
It is little to make to be in fast fluidized regime in reduction bed riser.It is advantageous that, former Iron Ore Powder occurs transformationreation with blast furnace gas
(Fe2O3)m(Fe3O4)n+CH4 Fex(FeO)y+CO2+H2O, the reaction is reversible, but the mixture of product is due to pneumatic transporting
Send and constantly move upwards, so, reacting condition balance is moved, and former Iron Ore Powder is constantly reduced to reduce breeze, while having
CO2Separate out；The flow velocity of gas is high in due to reducing bed riser, and entrainment effect is notable, and major part reduction breeze can not directly fall
Enter reduction reaction chamber, but in reduction bed riser with H2O and CO2Fluidisation is lifted, and Jing carbon dioxide cyclone separator falls into also
In raw ore oxidation reaction chamber.Bubbling fluidization state is in reduced ore oxidation reaction chamber, the solid material time of staying is long, has fully
Chemical time.
Former Iron Ore Powder is reduced through blast furnace gas, generates reduction breeze, H2O and CO2；Reduction breeze is in oxidizing chamber
Vigorous oxidation, generates block sintering deposit, discharges from slag-drip opening.Compared with traditional iron-smelting process, present invention achieves to CO2's
Trapping, can effectively mitigate greenhouse effect.
(2) present invention's is interconnected fluidized bed, and the amount of heat of release is delivered to the second heat exchanger by oxidation reaction chamber, heat exchange
WATER AS FLOW MEDIUM flows into First Heat Exchanger from the second heat exchanger, transfers heat to reduction room, is the reduction reaction heat supply for reducing room, makes
Obtain former Iron Ore Powder carries out reduction reaction on the basis of without extra power consumption.
(3) the current CO for reducing blast furnace ironmaking process2The technology of discharge, is focused primarily upon and is sprayed using new furnace charge, blast furnace
The aspect such as recycle of hydrogenous material and top gas is blown, major defect is complex manufacturing, with high costs.This
It is bright using interconnected fluidized bed heat exchange so that former iron mine separates that production in carbon dioxide process is easy, and non-secondary pollution is asked
Topic, package unit system operation cost is cheap.
Description of the drawings
Fig. 1 is sintered iron ore of the present invention and inherent separation CO2Installation drawing.
Wherein have：Former iron ore reduction reaction fluid bed 1, First Heat Exchanger 1-1 and dispenser 1-2, former iron ore reduction are anti-
Answer room 1-3, reduction reaction chamber changeover portion 1-4, overflow launder 1-5, reduction bed riser 1-6, tremie pipe 1-7, carbon dioxide whirlwind
Separator 1-8.
Reduced ore oxidation reaction fluid bed 2, spiral slag-drip opening 2-1, the second heat exchanger 2-2, reduced ore oxidation reaction chamber 2-
3rd, oxidation reaction chamber changeover portion 2-4, oxidation bed riser 2-5.
Specific embodiment
The sintered iron ore of the present invention and inherent separation CO2Method device, by former iron ore reduction reaction fluid bed 1 with
Reduced ore oxidation reaction fluid bed 2 is constituted.Former iron ore reduction reacts fluid bed 1 by former iron ore reduction reative cell 1-3, reduction reaction
Room changeover portion 1-4, reduction bed riser 1-6, carbon dioxide cyclone separator 1-8, tremie pipe 1-7, overflow launder 1-5, first are changed
Hot device 1-1 and dispenser 1-2 is constituted.The lower end of reduction bed riser 1-6 is by reduction reaction chamber changeover portion 1-4 and former iron mine
Reduction reaction chamber 1-3 is connected, and the upper end for reducing bed riser 1-6 is connected with the upper end of carbon dioxide cyclone separator 1-8, dioxy
The lower end for changing carbon cyclone separator 1-8 is connected by tremie pipe 1-7 with overflow launder 1-5, the lower end of former iron ore reduction reative cell 1-3
Side is connected with dispenser 1-2, and First Heat Exchanger 1-1 is arranged in around former iron ore reduction reative cell 1-3.Reduced ore oxidation reaction
Fluid bed 2 is by reduced ore oxidation reaction chamber 2-3, oxidation reaction chamber changeover portion 2-4, oxidation bed riser 2-5, the second heat exchanger 2-
2 and spiral slag-drip opening 2-1 compositions.The lower end of oxidation bed riser 2-5 is by oxidation reaction chamber changeover portion 2-4 and reduced ore oxygen
Change reative cell 2-3 to be connected, reduced ore oxidation reaction chamber 2-3 is connected by overflow launder 1-5 with tremie pipe 1-7, reduced ore oxidation is anti-
The lower end side for answering room 2-3 is connected with spiral slag-drip opening 2-1, and the second heat exchanger 2-2 is arranged in the week of reduced ore oxidation reaction chamber 2-3
Enclose；Cooling water is a-b-c-d-a in the sequence of flow of First Heat Exchanger 1-1, the second heat exchanger 2-2；In the reaction of former iron ore reduction
The former iron ore reduction reative cell 1-3 bottoms of fluid bed 1 are provided with blast furnace coal QI KOU A, and carbon dioxide cyclone separator 1-8 tops are provided with
Carbon dioxide air vent B；Air scoop D is provided with the reduced ore oxidation reaction chamber 2-3 bottoms of reduced ore oxidation reaction fluid bed 2,
Oxidation bed riser 2-5 tops are provided with oxygen debt air exhaust port E；The bottom C of overflow launder 1-5 is provided with loosening air port；Such as accompanying drawing 1.
Sintered iron ore of the present invention and inherent separation CO2Method, former Iron Ore Powder is added into former iron mine by dispenser 1-2
Reduction reaction chamber 1-3, in former iron ore reduction reative cell bottom A blast furnace gas is passed through, and former Iron Ore Powder reacts with blast furnace gas,
Obtain reducing breeze, gaseous product is H2O and CO2, the mixture of product is through former iron ore reduction reative cell changeover portion 1-4 entrance
Reduction bed riser 1-6.Cross-sectional area of the cross-sectional area of reduction bed riser 1-6 less than former iron ore reduction reative cell 1-3, also
Material in former bed riser 1-6 is in fast fluidized regime, gas of the reduced ore pruinescence from former iron ore reduction reative cell 1-3
H2O and CO2Lifted.Containing H2The CO of O2Discharge and trap from carbon dioxide cyclone separator 1-8 upper end outlets, condense and separate
Go out after water therein and pure CO is obtained2.Reduction breeze from carbon dioxide cyclone separator 1-8 lower ends Jing tremie pipe 1-7,
Overflow launder 1-5 enters reduced ore oxidation reaction chamber 2-3.Air, reduction breeze and oxygen are passed through in reduced ore oxidation reaction chamber lower end D
Gas vigorous oxidation, the heat of release makes the control of temperature in reduced ore oxidation reaction chamber 2-3 more than 1480 DEG C, the bulk of generation
Sintering deposit Jing spiral slag-drip openings 2-1 is discharged, and the oxygen debt air after burning is through reduced ore oxidation reaction chamber changeover portion 2-4, oxidation
Bed riser 2-5 is discharged.The amount of heat that oxidation bed reative cell 2-3 is produced passes through the second heat exchanger 2-2, First Heat Exchanger 1-1
Reduction reaction chamber 1-3 is delivered to, is reduction reaction heat supply；Such as accompanying drawing 1.
Claims (6)
1. a kind of sintered iron ore and the inherent device for separating carbon dioxide, it is characterised in that the device is by former iron ore reduction
Reaction fluid bed (1) is constituted with reduced ore oxidation reaction fluid bed (2)；Wherein：
Former iron ore reduction reaction fluid bed (1) includes former iron ore reduction reative cell (1-3), reduction reaction chamber changeover portion (1-4), also
Former bed riser (1-6), carbon dioxide cyclone separator (1-8), tremie pipe (1-7), overflow launder (1-5), First Heat Exchanger (1-
And dispenser (1-2) 1)；
Reduced ore oxidation reaction fluid bed (2) includes reduced ore oxidation reaction chamber (2-3), oxidation reaction chamber changeover portion (2-4), oxygen
Change bed riser (2-5), the second heat exchanger (2-2) and spiral slag-drip opening (2-1)；
Reduced ore oxidation reaction chamber (2-3) in reduced ore oxidation reaction fluid bed (2) passes through overflow launder (1-5) with former iron mine also
Tremie pipe (1-7) in original reaction fluid bed (1) is connected.
2. sintered iron ore according to claim 1 and the inherent device for separating carbon dioxide, it is characterised in that described
Former iron ore reduction reaction fluid bed (1) in, the lower end for reducing bed riser (1-6) passes through reduction reaction chamber changeover portion (1-4)
It is connected with former iron ore reduction reative cell (1-3), reduces upper end and the carbon dioxide cyclone separator (1-8) of bed riser (1-6)
Upper end be connected, the lower end of carbon dioxide cyclone separator (1-8) is connected by tremie pipe (1-7) with overflow launder (1-5), former ferrum
The lower end side of ore deposit reduction reaction chamber (1-3) is connected with dispenser (1-2), and it is anti-that First Heat Exchanger (1-1) is arranged in former iron ore reduction
Answer around room (1-3)；Blast furnace coal QI KOU (A), carbon dioxide cyclonic separation are provided with former iron ore reduction reative cell (1-3) bottom
Device (1-8) top is provided with carbon dioxide air vent (B)；Isopipe root (C) is provided with loosening air port.
3. sintered iron ore according to claim 1 and the inherent device for separating carbon dioxide, it is characterised in that described
Reduced ore oxidation reaction fluid bed (2) in, the lower end of oxidation bed riser (2-5) passes through oxidation reaction chamber changeover portion (2-4)
It is connected with reduced ore oxidation reaction chamber (2-3), lower end side and spiral slag-drip opening (2-1) phase of reduced ore oxidation reaction chamber (2-3)
Even, the second heat exchanger (2-2) is arranged in around reduced ore oxidation reaction chamber (2-3)；At reduced ore oxidation reaction chamber (2-3) bottom
End is provided with air scoop (D), and oxidation bed riser (2-5) top is provided with oxygen debt air exhaust port (E).
4. sintered iron ore according to claim 1 and the inherent device for separating carbon dioxide, it is characterised in that first
What the interface b between heat exchanger (1-1) and the second heat exchanger (2-2) to interface c and interface d to interface a was connected by heat pipe, heat pipe
The sequence of flow of middle conduction oil is a-b-c-d-a.
5. sintered iron ore according to claim 1 and the inherent device for separating carbon dioxide, it is characterised in that be passed through
The loosening elegance air of isopipe root (C).
6. a kind of method that sintered iron ore of device as claimed in claim 1 and inherence separate carbon dioxide, it is characterised in that：
Former Iron Ore Powder is added into former iron ore reduction reative cell (1-3), in former iron ore reduction reative cell bottom (A) blast furnace gas is passed through, it is former
Iron Ore Powder reacts with blast furnace gas, and the ferrum element of high-valence state is restored to lower valency in former Iron Ore Powder, obtains reducing breeze,
Gaseous product is H2O and CO2；The mixture of product enters reduction bed riser through former iron ore reduction reative cell changeover portion (1-4)
(1-6)；The cross-sectional area of reduction bed riser (1-6) reduces bed and carries less than the cross-sectional area of former iron ore reduction reative cell (1-3)
Material in riser (1-6) is in fast fluidized regime, gas of the reduced ore pruinescence from former iron ore reduction reative cell (1-3)
H2O and CO2Lifted；Containing H2The CO of O2Discharge and trap from carbon dioxide cyclone separator (1-8) upper end outlet, condense and divide
Separate out and be obtained after water therein pure CO2；Reduction breeze is from carbon dioxide cyclone separator (1-8) lower end Jing tremie pipes
(1-7), overflow launder (1-5) enters reduced ore oxidation reaction chamber (2-3)；Air is passed through in reduced ore oxidation reaction chamber lower end (D),
Bubbling fluidized bed state is in reduced ore oxidation reaction chamber (2-3)；The reduction breeze of lower valency and oxygen vigorous oxidation, release
Heat, sinters, and generates block sintering deposit, and sintering deposit Jing spiral slag-drip openings (2-1) is discharged；Oxygen debt air after burning is passed through
Reduced ore oxidation reaction chamber changeover portion (2-4), oxidation bed riser (2-5) are discharged；It is a large amount of that oxidation bed reative cell (2-3) is produced
Heat is by the second heat exchanger (2-2), First Heat Exchanger (1-1) is delivered to reduction reaction chamber (1-3), is that former reduction of iron ore fines is anti-
Answer heat supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131257.4A CN106676260A (en) | 2017-03-07 | 2017-03-07 | Device and method for sintering iron ore and internally separating carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710131257.4A CN106676260A (en) | 2017-03-07 | 2017-03-07 | Device and method for sintering iron ore and internally separating carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106676260A true CN106676260A (en) | 2017-05-17 |
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ID=58828551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710131257.4A Pending CN106676260A (en) | 2017-03-07 | 2017-03-07 | Device and method for sintering iron ore and internally separating carbon dioxide |
Country Status (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699187A (en) * | 2009-10-21 | 2010-04-28 | 东南大学 | Coal combustion apparatus capable of separating carbon dioxide and separation method thereof |
| CN106048214A (en) * | 2016-06-07 | 2016-10-26 | 东南大学 | Device and method for preparing sinter by synthesis gas reduction combustion and separating CO2 |
| CN106048212A (en) * | 2016-06-07 | 2016-10-26 | 东南大学 | Device and method for preparing sinter by staged reduction combustion and separating CO2 |
-
2017
- 2017-03-07 CN CN201710131257.4A patent/CN106676260A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699187A (en) * | 2009-10-21 | 2010-04-28 | 东南大学 | Coal combustion apparatus capable of separating carbon dioxide and separation method thereof |
| CN106048214A (en) * | 2016-06-07 | 2016-10-26 | 东南大学 | Device and method for preparing sinter by synthesis gas reduction combustion and separating CO2 |
| CN106048212A (en) * | 2016-06-07 | 2016-10-26 | 东南大学 | Device and method for preparing sinter by staged reduction combustion and separating CO2 |
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