CN106834584A - A kind of method of gas-based shaft kiln and production DRI - Google Patents
A kind of method of gas-based shaft kiln and production DRI Download PDFInfo
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- CN106834584A CN106834584A CN201710177870.XA CN201710177870A CN106834584A CN 106834584 A CN106834584 A CN 106834584A CN 201710177870 A CN201710177870 A CN 201710177870A CN 106834584 A CN106834584 A CN 106834584A
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- gas
- heater
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- sealer
- blanket
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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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
A kind of method that the present invention discloses gas-based shaft kiln and production DRI.Gas-based shaft kiln includes body of heater, feeding-passage, first gas sealer, second gas sealer and CO in removal gaseous mixture2Gas treatment equipment；The discharging opening of feeding-passage connects the charging aperture of body of heater, and the mixed gas outlet of body of heater connects the combi inlet port of gas treatment equipment, the also Primordial Qi import of the also Primordial Qi outlet connection body of heater of gas treatment equipment.The present invention both ensure that top gas will not be escaped using double gas-dynamic sealings, in turn ensure that the high-quality of top gas, improve the productivity ratio and energy utilization rate of gas-based shaft kiln.
Description
Technical field
Erected the invention belongs to water-tight equipment technical field, more particularly to a kind of gas base for being used to two kinds of gases simultaneously seal
The method of stove and production DRI.
Background technology
DRI (DRI), also known as sponge iron, is that iron ore is reduced directly the iron content for obtaining under less than fusion temperature
Product.Sponge iron is a kind of substitute of steel scrap, is electric furnace refining clean steel, the indispensable impurity diluent of high-quality steel, is to turn
Stove makes steel the cooling agent of high-quality, is to develop the indispensable raw material of Ferrous Metallurgy short route., whole world DRI in 2014
Annual production up to 74,500,000 tons, record high.China by direct-reduction technique be classified as development of iron ＆ steel industry Main way it
One.
The technique for producing DRI is referred to as direct-reduction process, belongs to non-blast furnace ironmaking technique, is divided into gas base method and coal
The major class of base method two.In current world wide, 76% DRI is produced by gas-based shaft kiln method, gas base method current generation
Table technique includes MIDREX techniques, HYL techniques and PERED techniques.The main equipment of these three technique productions DRIs is equal
It is gas-based shaft kiln, wherein HYL process feeds system is sealed with discharge system using the upper and lower bivalve of buffering batch can；And
The feed system of MIDREX techniques and PERED techniques uses gas sealing system with discharge system, as prevents the coal gas in stove from letting out
Drain to outside stove, the gas sealing system using gas-dynamic sealing is provided with furnace roof charging and at furnace bottom discharging, blanket gas
Main component is nitrogen.The subject matter that gas sealing system is present is, if sealing atmospheric pressure is high, to be easily caused blanket gas and largely enter
Enter in shaft furnace, reduce top gas and also Primordial Qi quality in shaft furnace；If sealing atmospheric pressure is low, coal gas in shaft furnace is easily caused a large amount of
Effusion, endangers personal safety.
In actual production, gas-based shaft kiln feed system can be using rich in N2Conversion furnace exhaust gas carry out dynamic sealing, can lead
Cause 10-20Nm3The N of/DRI2It is enriched in shaft furnace top gas, so as to cause top gas circulation ratio too high, only about 67%,
Invalid components N otherwise also in Primordial Qi2Too high levels, and reduce shaft furnace production efficiency and wasted heat.
The content of the invention
In order to solve the above problems, a kind of method that the present invention proposes gas-based shaft kiln and production DRI, using the
One blanket gas prevents the top gas in gas-based shaft kiln from escaping, and the N in the first blanket gas is prevented using the second blanket gas2It is mixed into gas base
In shaft furnace, and then allow that top gas is significantly improved as the ratio that recycles of reducing medium.
An object of the present invention is to provide a kind of gas-based shaft kiln, including body of heater, feeding-passage, first gas sealer,
CO in second gas sealer and removal gaseous mixture2Gas treatment equipment；
The body of heater includes charging aperture, mixed gas outlet and also Primordial Qi import；
The gas treatment equipment includes combi inlet port and also Primordial Qi outlet；
By the charging aperture of the feeding-passage to discharging opening, first gas sealer and second gas sealing are set gradually
Device, the first gas sealer is connected with the feeding-passage, and the second gas sealer is connected with the feeding-passage,
The second gas sealer to the discharging opening of feeding-passage distance be 4~6m, the first gas sealer to the second gas
The distance of body sealer is 0.5~3.0m；
The discharging opening of the feeding-passage connects the charging aperture of the body of heater, and the mixed gas outlet connection of the body of heater is described
The combi inlet port of gas treatment equipment, the also Primordial Qi of the also Primordial Qi outlet connection body of heater of the gas treatment equipment is entered
Mouthful.
In the present invention, the pressure of first gas sealer is slightly above the pressure of second gas sealer, second gas sealing
The pressure of device is higher than the pressure in body of heater.The main component of the first blanket gas is N2, the main component of the second blanket gas is CO2.Profit
The second blanket gas is used, the first blanket gas can be prevented to enter body of heater, the blanket gas of small part second is mixed after entering body of heater with top gas
Mixed gas are combined into, body of heater is discharged, after mixed gas are processed through gas treatment equipment, also Primordial Qi can be obtained, also Primordial Qi is passed through
In body of heater, for the production of DRI.
Used as the preferred scheme of this law, the gas treatment equipment is decarbonizer, and the decarbonizer includes combi inlet port
With also Primordial Qi outlet, the combi inlet port of the mixed gas outlet connection decarbonizer of the body of heater, the reduction of the decarbonizer
The also Primordial Qi import of the gas outlet connection body of heater.Decarbonizer can remove the CO in mixed gas2, obtain also Primordial Qi.
Another scheme is that the gas treatment equipment is reforming stove, and the reforming stove enters including gaseous mixture
Mouth and also Primordial Qi outlet, the mixed gas outlet of the body of heater connect the combi inlet port of the reforming stove, the reformation turn
Change the also Primordial Qi import of the also Primordial Qi outlet connection body of heater of stove.Reforming stove can be by CO2It is converted into CO and H2, CO and H2
It is the constituent of also Primordial Qi.
Further, the gas-based shaft kiln is also exported including reduced iron, and the reduced iron outlet is positioned at the bottom of the body of heater
Portion.
Further, the gas-based shaft kiln also includes hopper, and the hopper connects the charging aperture of the feeding-passage.
It is a further object of the present invention to provide a kind of method that DRI is produced using above-mentioned gas-based shaft kiln, including with
Lower step：
A, the first blanket gas is passed through in the first gas sealer, N in first blanket gas2Percent by volume
>=85%；
B, the second blanket gas is passed through in the second gas sealer, CO in second blanket gas2Volume basis
Than >=80%；
C, make the pressure of first blanket gas higher than the 20~100Pa of pressure of second blanket gas, described second is close
The pressure of gas is sealed higher than the 400~600Pa of gas pressure in the body of heater；
D, by raw material by the feeding-passage send into gas-based shaft kiln, generate DRI and top gas, the top gas
Mixed gas are mixed into the second blanket gas for entering body of heater；
E, the mixed gas are sent into the gas treatment equipment, remove CO therein2, obtain also Primordial Qi；
F, by it is described reduction pneumatic transmission enter the body of heater.
Used as preferred embodiments of the present invention, first blanket gas is combustion product gases or pure nitrogen gas.
Used as preferred embodiments of the present invention, second blanket gas is CO2Periodic off-gases or pure CO2。
Specifically, in the step E, using decarbonizer, the CO in removing mixed gas2。
Another scheme, in the step E, using reforming stove, by the CO in mixed gas2It is converted into CO and H2。
Gas-based shaft kiln and the method for production DRI that the present invention is provided, gas-based shaft kiln is prevented using the first blanket gas
Interior top gas effusion, the N in the first blanket gas is prevented using the second blanket gas2It is mixed into gas-based shaft kiln, can significantly reduces
Blanket gas is mixed into the N in top gas2Content；Using the CO in gas treatment equipment removal mixed gas2, so that shaft furnace
The quality of top gas and also Primordial Qi is greatly improved, and then causes that top gas can as the ratio that recycles of reducing medium
To significantly improve, more than 80% is reached, improve the production efficiency and capacity usage ratio of gas-based shaft kiln.
Brief description of the drawings
Fig. 1 is the gas-based shaft kiln schematic diagram of the embodiment of the present invention.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the invention is described in more details, so as to energy
Enough more fully understand the advantage of the solution of the present invention and its various aspects.However, specific embodiments described below and implementation
Example is only descriptive purpose, rather than limitation of the present invention.
In the embodiment of the present invention, unit Nm3Under/DRI refers to the standard state of the gas of DRI per ton consumption
Volume.
As shown in figure 1, the embodiment of the present invention provides a kind of gas-based shaft kiln, it includes body of heater 1, hopper 2, feeding-passage 3, the
One air seal device 4, second gas sealer 5 and gas treatment equipment 6.The raw material of gas-based shaft kiln is the acid pellet rich in iron
Or lump ore.
The inside of body of heater 1 is cavity, is the production containers of DRI, body of heater 1 include charging aperture, mixed gas outlet and
Also Primordial Qi import.
Hopper 2 is the device of the gas-based shaft kiln storage of raw materials.Hopper 2 connects the charging aperture of feeding-passage 3, can control raw material
Inlet.Feeding-passage 3 is the pipeline that elongated raw material is entered body of heater 1 by hopper 2, the discharging opening connection body of heater 1 of feeding-passage 3
Charging aperture.
By the charging aperture of feeding-passage 3 to discharging opening, first gas sealer 4 and second gas sealer 5 are set gradually,
First gas sealer 4 and second gas sealer 5 are installed on feeding-passage 3.First gas sealer 4 and feeding-passage
3 connections, second gas sealer 5 is connected with feeding-passage 3, the distance of the discharging opening of second gas sealer 5 to feeding-passage 3
It is 4~6m, the distance of the 4 to the second sealer of first gas sealer 5 is 0.5~3.0m.Second gas sealer 5 is logical to charging
The distance of the discharging opening in road 3 and the distance of the 4 to the second sealer of first gas sealer 5, the actual state according to equipment are true
It is fixed.
First gas sealer 4 and second gas sealer 5 coordinate, and top gas is escaped in preventing gas-based shaft kiln, while anti-
Only the first blanket gas enters in body of heater 1.
Gas treatment equipment 6 is used to remove the CO in mixed gas2, improve the quality of also Primordial Qi.Gas treatment equipment 6 is wrapped
Include combi inlet port and also Primordial Qi outlet.The mixed gas outlet of body of heater 1 connects the combi inlet port of gas treatment equipment 6, gas
The also Primordial Qi import of the also Primordial Qi outlet connection body of heater 1 of processing unit 6.
In the embodiment of the present invention, gas treatment equipment 6 can be decarbonizer, and decarbonizer can be removed in mixed gas
CO2, obtain also Primordial Qi.Decarbonizer includes combi inlet port and also Primordial Qi outlet, the mixed gas outlet connection decarbonizer of body of heater
Combi inlet port, the also Primordial Qi import of the also Primordial Qi outlet connection body of heater of decarbonizer.
In the embodiment of the present invention, another preferred scheme is that gas treatment equipment 6 is reforming stove.In mixed gas
CO2With CH in reforming stove4Reforming CO and H for needed for reduction of iron ore2.Reforming stove includes gaseous mixture
Import and also Primordial Qi outlet, the mixed gas outlet of body of heater connect the combi inlet port of reforming stove, the reduction of reforming stove
The also Primordial Qi import of gas outlet connection body of heater.
Further, gas-based shaft kiln is also exported including reduced iron, and reduced iron outlet is positioned at the bottom of body of heater.
The another object of the embodiment of the present invention is to provide a kind of method that DRI is produced using above-mentioned gas-based shaft kiln,
Comprise the following steps：
1st, the first blanket gas, N in the first blanket gas are passed through in first gas sealer2Percent by volume >=85%.
2nd, the second blanket gas, CO in the second blanket gas are passed through in second gas sealer2Percent by volume >=80%.
3rd, make the pressure of the first blanket gas higher than the 20~100Pa of pressure of the second blanket gas, the pressure of the second blanket gas is high
In the 400~600Pa of gas pressure of body of heater.
4th, raw material is sent into gas-based shaft kiln by feeding-passage, generates DRI and top gas, top gas with enter stove
Second blanket gas of body is mixed into mixed gas.
5th, mixed gas are sent into gas treatment equipment, removes CO therein2, obtain also Primordial Qi.
6th, reduction pneumatic transmission is entered into body of heater.
Used as preferred scheme, the first blanket gas is combustion product gases or pure nitrogen gas, and the second blanket gas is CO2Periodic off-gases are pure
CO2。
In above-mentioned step 5, gas treatment equipment can be decarbonizer, and decarbonizer can remove the CO in mixed gas2。
Gas treatment equipment can also be reforming stove, and reforming stove is by the CO in mixed gas2It is converted into CO and H2。
The embodiment of the present invention can significantly reduce the nitrogen content being mixed into top gas, make it below 3Nm3/DRI.Top gas
In the CO that is mixed into2Content is less than 10Nm3/DRI.Top gas is as the recycle ratio of reducing medium up to more than 80%.
Second blanket gas is using rich in CO2Gas so that greenhouse gases are turned waste into wealth, can both reduce the row of greenhouse gases
Put, the N that blanket gas is mixed into shaft furnace is reduced again2Content.
The embodiment of the present invention uses rich N2Gas and richness CO2Double gas-dynamics sealing of gas, it is main that the former plays
Effect is that the Main Function of the latter is to prevent the N in the first blanket gas in preventing top gas in gas-based shaft kiln from escaping into air2It is mixed
Enter in stove.The effect of two kinds of blanket gas is complementary to one another, Coordinated Play effect.The two can also be realized, when one of which sealing
After gas is out of order, another blanket gas can ensure the normal table operation of shaft furnace system by adjusting tolerance.
Embodiment 1
Full Iron grade be 67% acid pellet enter material bin after, be slowly moved downwardly into stove through elongated feeding-passage
Body, gas is gradually reduced in gas-based shaft kiln and is reduced into qualified direct-reduction iron product and is discharged gas-based shaft kiln.
To prevent the top gas in gas-based shaft kiln (rich in CO and H2) escape and the N in blanket gas2Composition is largely mixed into shaft furnace
It is interior, it is disposed with two sets of sealing systems-first gas sealer and second gas sealing from top to bottom at feeding-passage
Device.First blanket gas is reforming stove combustion product gases, and tolerance is 60Nm3/ DRI, the second blanket gas is at mixed gas decarburization
The CO that reason is obtained2The periodic off-gases of content about 99%, tolerance is 15Nm3/DRI.Second sealing atmospheric pressure is high compared with seal point furnace pressure
About 450Pa, the first blanket gas pressure ratio second seals atmospheric pressure 80Pa high.
So as to realize blanket gas be mixed into gas-based shaft kiln and and then nitrogen content into top gas significantly reduce, about
1.5Nm3/ DRI, is mixed into the CO in shaft furnace2Content about 8Nm3/DRI.Two kinds of pressure of blanket gas are according to respective differential pressure regulator
It is controlled.
About 900 DEG C of also Primordial Qi that gas-based shaft kiln is used are obtained with circulation top gas by natural gas in reforming stove, are erected
The circulation ratio of stove circulation top gas is 85%.The CO being mixed into2In the follow-up carbonization treatment operation removing of top gas.
Embodiment 2
Full Iron grade be 67% acid pellet enter feed arrangement after, slowly through elongated feeding-passage move down into
Enter gas-based shaft kiln, gas is gradually reduced in gas-based shaft kiln and is reduced into qualified direct-reduction iron product and is discharged gas-based shaft kiln.
To prevent the top gas in gas-based shaft kiln (rich in CO and H2) escape and the N in blanket gas2Composition is largely mixed into shaft furnace
It is interior, it is disposed with two sets of sealing systems-first gas sealer and second gas sealing from top to bottom at feeding-passage
Device.First blanket gas is reforming stove combustion product gases, and tolerance is 65Nm3/ DRI, the second blanket gas is top gas carbonization treatment
The CO for obtaining2The periodic off-gases of content about 99%, tolerance is 13Nm3/DRI.Second sealing atmospheric pressure is high compared with seal point furnace pressure about
550Pa, the first blanket gas pressure ratio second seals atmospheric pressure 20Pa high.
So as to realize blanket gas be mixed into gas-based shaft kiln and and then nitrogen content into top gas significantly reduce, about
1.1Nm3/ DRI, is mixed into the CO in shaft furnace2Content about 9.5Nm3/DRI.Two kinds of pressure of blanket gas are adjusted according to respective pressure difference
Device is controlled.
About 900 DEG C of also Primordial Qi that gas-based shaft kiln is used are obtained with circulation top gas by natural gas in reforming stove, are erected
The circulation ratio of stove circulation top gas is 90%.The CO being mixed into2In the follow-up carbonization treatment operation removing of top gas.
It should be noted that each embodiment above by reference to described by accompanying drawing is only used to illustrate rather than limitation originally
The scope of invention, it will be understood by those within the art that, it is right under the premise without departing from the spirit and scope of the present invention
Modification or equivalent that the present invention is carried out, all should cover within the scope of the present invention.Additionally, signified unless the context
Outward, the word for occurring in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can combine any other embodiment all or part of use.
Claims (10)
1. a kind of gas-based shaft kiln, including body of heater, it is characterised in that also including feeding-passage, first gas sealer, second gas
CO in sealer and removal gaseous mixture2Gas treatment equipment；
The body of heater includes charging aperture, mixed gas outlet and also Primordial Qi import；
The gas treatment equipment includes combi inlet port and also Primordial Qi outlet；
By the charging aperture of the feeding-passage to discharging opening, first gas sealer and second gas sealer, institute are set gradually
State first gas sealer to be connected with the feeding-passage, the second gas sealer is connected with the feeding-passage, described
The distance of second gas sealer to the discharging opening of feeding-passage is 4~6m, and the first gas sealer is close to second gas
The distance for sealing device is 0.5~3.0m；
The discharging opening of the feeding-passage connects the charging aperture of the body of heater, and the mixed gas outlet of the body of heater connects the gas
The combi inlet port of processing unit, the also Primordial Qi import of the also Primordial Qi outlet connection body of heater of the gas treatment equipment.
2. gas-based shaft kiln according to claim 1, it is characterised in that the gas treatment equipment is decarbonizer, it is described de-
Carbon device includes combi inlet port and also Primordial Qi outlet, and the gaseous mixture of the mixed gas outlet connection decarbonizer of the body of heater enters
Mouthful, the also Primordial Qi import of the also Primordial Qi outlet connection body of heater of the decarbonizer.
3. gas-based shaft kiln according to claim 1, it is characterised in that the gas treatment equipment is reforming stove, institute
Reforming stove is stated including combi inlet port and Primordial Qi outlet is gone back, the mixed gas outlet of the body of heater connects the reforming stove
Combi inlet port, the also Primordial Qi import of the also Primordial Qi outlet connection body of heater of the reforming stove.
4. gas-based shaft kiln according to claim 1, it is characterised in that further include that reduced iron is exported, the reduced iron
Outlet is positioned at the bottom of the body of heater.
5. gas-based shaft kiln according to claim 1, it is characterised in that further include hopper, the hopper connection is described
The charging aperture of feeding-passage.
6. the method that a kind of any described gas-based shaft kiln of utilization claim 1~5 produces DRI, it is characterised in that
Including step：
A, the first blanket gas is passed through in the first gas sealer, N in first blanket gas2Percent by volume >=
85%；
B, the second blanket gas is passed through in the second gas sealer, CO in second blanket gas2Percent by volume >=
80%；
C, make the pressure of first blanket gas higher than the 20~100Pa of pressure of second blanket gas, second blanket gas
Pressure higher than the 400~600Pa of gas pressure in the body of heater；
D, by raw material by the feeding-passage send into gas-based shaft kiln, generate DRI and top gas, the top gas with enter
The second blanket gas for entering body of heater is mixed into mixed gas；
E, the mixed gas are sent into the gas treatment equipment, remove CO therein2, obtain also Primordial Qi；
F, by it is described reduction pneumatic transmission enter the body of heater.
7. method according to claim 6, it is characterised in that first blanket gas is combustion product gases or pure nitrogen gas.
8. method according to claim 6, it is characterised in that second blanket gas is CO2Periodic off-gases or pure CO2。
9. method according to claim 6, it is characterised in that in the step E, using decarbonizer, removes gaseous mixture
CO in body2。
10. method according to claim 6, it is characterised in that in the step E, using reforming stove, will mix
CO in gas2It is converted into CO and H2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177870.XA CN106834584A (en) | 2017-03-23 | 2017-03-23 | A kind of method of gas-based shaft kiln and production DRI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710177870.XA CN106834584A (en) | 2017-03-23 | 2017-03-23 | A kind of method of gas-based shaft kiln and production DRI |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106834584A true CN106834584A (en) | 2017-06-13 |
Family
ID=59130160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710177870.XA Pending CN106834584A (en) | 2017-03-23 | 2017-03-23 | A kind of method of gas-based shaft kiln and production DRI |
Country Status (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107216898A (en) * | 2017-07-18 | 2017-09-29 | 洛阳建材建筑设计研究院有限公司 | A kind of oil shale swinging gas retort anoxybiotic sealing technology |
| SE2051376A1 (en) * | 2020-11-25 | 2022-05-26 | Hybrit Dev Ab | Process for the production of carburized sponge iron |
| SE2150068A1 (en) * | 2021-01-22 | 2022-07-23 | Hybrit Dev Ab | Arrangement and process for charging iron ore to, and/or discharging sponge iron from, a direct reduction shaft |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3680849A (en) * | 1969-09-17 | 1972-08-01 | Demag Ag | Charging device for a blast furnace |
| JPS56142810A (en) * | 1980-04-07 | 1981-11-07 | Nippon Steel Corp | Device for charging raw materials into reducing shaft furnace |
| CN202898446U (en) * | 2012-11-22 | 2013-04-24 | 中冶赛迪工程技术股份有限公司 | Top charging device of shaft furnace |
| CN205368416U (en) * | 2016-01-14 | 2016-07-06 | 北京神雾环境能源科技集团股份有限公司 | Shaft furnace charging apparatus |
| CN206607259U (en) * | 2017-03-23 | 2017-11-03 | 江苏省冶金设计院有限公司 | A kind of gas-based shaft kiln |
-
2017
- 2017-03-23 CN CN201710177870.XA patent/CN106834584A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3680849A (en) * | 1969-09-17 | 1972-08-01 | Demag Ag | Charging device for a blast furnace |
| JPS56142810A (en) * | 1980-04-07 | 1981-11-07 | Nippon Steel Corp | Device for charging raw materials into reducing shaft furnace |
| CN202898446U (en) * | 2012-11-22 | 2013-04-24 | 中冶赛迪工程技术股份有限公司 | Top charging device of shaft furnace |
| CN205368416U (en) * | 2016-01-14 | 2016-07-06 | 北京神雾环境能源科技集团股份有限公司 | Shaft furnace charging apparatus |
| CN206607259U (en) * | 2017-03-23 | 2017-11-03 | 江苏省冶金设计院有限公司 | A kind of gas-based shaft kiln |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107216898A (en) * | 2017-07-18 | 2017-09-29 | 洛阳建材建筑设计研究院有限公司 | A kind of oil shale swinging gas retort anoxybiotic sealing technology |
| SE2051376A1 (en) * | 2020-11-25 | 2022-05-26 | Hybrit Dev Ab | Process for the production of carburized sponge iron |
| SE545311C2 (en) * | 2020-11-25 | 2023-06-27 | Hybrit Dev Ab | Process for the production of carburized sponge iron |
| SE2150068A1 (en) * | 2021-01-22 | 2022-07-23 | Hybrit Dev Ab | Arrangement and process for charging iron ore to, and/or discharging sponge iron from, a direct reduction shaft |
| SE546387C2 (en) * | 2021-01-22 | 2024-10-22 | Hybrit Dev Ab | Arrangement and process for charging iron ore to, and/or discharging sponge iron from, a direct reduction shaft |
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