CN106834578A - System and method associated with a kind of gas-based shaft kiln and electric furnace - Google Patents
System and method associated with a kind of gas-based shaft kiln and electric furnace Download PDFInfo
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- CN106834578A CN106834578A CN201710012873.8A CN201710012873A CN106834578A CN 106834578 A CN106834578 A CN 106834578A CN 201710012873 A CN201710012873 A CN 201710012873A CN 106834578 A CN106834578 A CN 106834578A
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- gas
- electric furnace
- shaft kiln
- based shaft
- tank body
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Classifications
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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
-
- 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
-
- 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
-
- 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
-
- 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
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The present invention discloses a kind of gas-based shaft kiln and electric furnace combined system and method.The system includes gas-based shaft kiln, storage tank, elephant trunk and electric furnace；Gas-based shaft kiln includes material inlet, material outlet, gas vent and goes back Primordial Qi entrance；Storage tank includes tank body, material weight instrument and support frame, and tank body includes charging aperture and discharging opening, and material weight instrument is fixed on support frame, and tank body is fixed on material weight instrument；Electric furnace includes charging aperture；Gas-based shaft kiln material outlet connects tank body charging aperture, and tank body discharging opening connects the charging aperture of electric furnace by elephant trunk；The method is the method for combined use of said system.The present invention increased storage tank between gas-based shaft kiln and electric furnace, improve the structure of gas-based shaft kiln so that whole system can greatly improve the sensible heat utilization rate of sponge iron, reduce the consumption of electric energy during electric furnace melts point.
Description
Technical field
The invention belongs to smelting equipment technical field, more particularly to a kind of gas-based shaft kiln and electricity for direct reduction iron making
System and method associated with stove.
Background technology
At present, blast-furnace iron-making method is still the main method of steel production, and its major defect for existing is that have to metallurgical coke
There is strong dependency.With metallurgical coke natural resources shortage, hold at high price rather than coking coal resource storage extensively and can not be utilized,
And China is administering the promulgation of the policy such as haze and strict control dusty gas discharge, blast-furnace iron-making method encounters unprecedented
Challenge, and the superiority of the direct-reduction process headed by gas-based shaft kiln production technology is then more and more significant.
Gas-based shaft kiln production technology refers to be independent of blast furnace, and the production process of sponge iron is refined by gas-based shaft kiln equipment.
The raw material of gas-based shaft kiln production and application is pellet or iron ore.Pellet or iron ore are placed in gas-based shaft kiln furnace roof preheating section
Enter reduction section after being preheated and reduction reaction occurs, produce the sponge iron product with uniform temperature.
Gas-based shaft kiln is made up of preheating section, reduction section and cooling section, and cold sponge iron is delivered to carried out in electric furnace molten point
Production molten steel, converter steel making working procedure in substitution blast-furnace iron-making method flow long is that postorder casting process is carried out continuously and provides safeguard.
Because gas-based shaft kiln directly reduced technique contains cooling section, cooling gas are also Primordial Qi, coke-oven coal at room temperature
Gas or natural gas, on the one hand cause a large amount of of sponge iron energy and scatter and disappear, and the molten point process of postorder needs to provide more electric energy.Separately
On the one hand cooling gas to be prepared and increased gas-making process burden, also to warmed-up cooling gas safe storage and ecological environment band
Carry out new problem.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of gas-based shaft kiln and system and method associated with electric furnace, in gas base
Storage tank is increased between shaft furnace and electric furnace, the structure of gas-based shaft kiln is improved so that whole system can be sharp to greatest extent
With the sensible heat of high-temperature sponge iron, the consumption of electric energy during electric furnace melts point is reduced.
An object of the present invention is to provide a kind of gas-based shaft kiln and electric furnace combined system, including gas-based shaft kiln, storage tank,
Elephant trunk and electric furnace；
The gas-based shaft kiln includes material inlet, material outlet, gas vent and goes back Primordial Qi entrance；
The storage tank includes tank body, material weight instrument and support frame, and the tank body includes charging aperture and discharging opening, the material weight
Instrument is fixed on support frame as described above, and the tank body is fixed on the material weight instrument；
The electric furnace includes charging aperture；
The gas-based shaft kiln material outlet connects the tank body charging aperture, and the tank body discharging opening connects described by elephant trunk
The charging aperture of electric furnace, the tank body is located at the lower section of the gas-based shaft kiln, and the electric furnace is located at the lower section of the tank body.
Gas-based shaft kiln includes preheating section and reduction section, and material inlet is located at the top of gas-based shaft kiln, and gas vent is located at pre-
Hot arc, also Primordial Qi entrance are located at reduction section, and material outlet is located at the bottom of gas-based shaft kiln.Gas-based shaft kiln eliminate cooling section and its
Cooling procedure associated satellite equipment.
The high-temperature sponge iron that gas-based shaft kiln is produced is stored in being continuously expelled to storage tank.Storage tank is played in the entire system
The effect formed a connecting link.When electric furnace needs charging, the sponge iron that will be stored in storage tank delivers to electric furnace.The capacity of its tank body must
Gas-based shaft kiln and electric furnace combined system quantity-produced requirement must be met.Tank body minimum volume volume determines by formula V=Q × t,
In formula, Q is gas-based shaft kiln unit interval sponge iron yield, and t is period of storage；T=t1+t2-t3+t4+tother, in formula, t1It is electricity
Stove charge time, t2Between timesharing being melted for electric furnace, t3It is molten point of process overlapping time, t of electric furnace charging and electric furnace4For electric furnace electrode more
Change the time, totherIt it is other servicing times of electric furnace, electric furnace charging and electric furnace melt and be divided to process to be two self-contained process but presence
Regular hour intersects, therefore the molten point process of electric furnace is relatively continuously rather than absolute continuation.
Further, system of the invention also includes washer, preheater and reburner,
The washer includes gas access, the first gas exit；
The preheater includes gaseous mixture entrance and gas vent；
The reburner includes gas access and also Primordial Qi outlet；
The gas-based shaft kiln gas vent connects the washer gas access, the connection of the gas exit of the washer first
The preheater gaseous mixture entrance, the preheater gas vent connects the reburner gas access, the reburner reduction
The gas outlet connection gas-based shaft kiln also Primordial Qi entrance.
Further, system of the invention also include gas compressor, the gas compressor include gas access and
Gas vent；The washer includes the second gas exit, and the reburner includes fuel gas inlet, the coal gas of the washer second
The outlet connection gas compressor gas access, the gas compressor gas vent connects the reburner fuel gas inlet.
Further, system of the invention also includes feed bin, and the feed bin includes discharging opening, the feed bin discharge hole connection
The gas-based shaft kiln material inlet.
Preferably, the gas-based shaft kiln material outlet connects the tank body charging aperture, the elephant trunk by the first bellows
By the second bellows connection electric furnace charging aperture, the two ends of first bellows and the second bellows are provided with flange, its
Other equipment is connected by flange.
To be flexible coupling between solid and material weight instrument, i.e., can be relatively moved between tank body and material weight instrument, be easy to expect weight instrument to tank
Body is weighed.Gas-based shaft kiln and tank body are connected by the first bellows, it can be ensured that when tank body in the vertical direction is subjected to displacement
The safety of system.Molten point of electric furnace is finished, and discharges molten steel and electroslag, and body of heater fascinates during this, electric furnace Maintenance and Repair
Distortion and rotation that Cheng Zhonghui occurs.Second bellows connects elephant trunk and electric furnace, it is ensured that the rotation of electric furnace will not be caused to system
Influence.
Further, the flange of first bellows and the second bellows is provided with nitrogen protection device.In flange
Junction setting nitrogen protection device can prevent air from leaking into causes the sponge iron of heat to be oxidized.
Used as preferred embodiments of the present invention, the elephant trunk outer layer is steel plate, and centre is insulation material, and internal layer is cast iron, institute
The inner surface for stating cast iron is coated with heat-resisting, exotic material, such as Al2O3Ceramic material, 3~7mm of its thickness.
Further, system of the invention also includes auxiliary material pipeline, and the auxiliary material pipeline is connected with the elephant trunk.It is preferred that
, auxiliary material pipeline is located at the exit of elephant trunk, and the charging aperture with electric furnace forms threeway.
It is a further object of the present invention to provide a kind of method associated with said system, comprise the following steps：
A, by raw material gas-based shaft kiln with also Primordial Qi reduced, generate sponge iron and top gas；
B, the tank body that the sponge iron is sent into storage tank, the weight of the sponge iron of storage is determined by material weight instrument in tank body；
C, when electric furnace product discharge after, the sponge iron in the tank body is sent into electric furnace by elephant trunk.
The process step of the top gas produced for gas-based shaft kiln is as follows：
D, the top gas is carried out into wash cooling after obtain coal gas；
E, it is that 70%~80% gas and natural gas mix acquisition mixed gas by percent by volume in the coal gas, will
Mixed gas are sent into the preheater and are preheated, and residual gas are sent into the gas compressor and pressurizeed；
F, the mixed gas after preheating are sent into the reburner, carry out catalytic cracking reaction, generation also Primordial Qi；Will pressurization
The fuel inlet that coal gas afterwards sends into the reburner is burnt；
G, by it is described reduction pneumatic transmission enter gas-based shaft kiln.
As preferred embodiments of the present invention, step was included before the step A：Raw material is sent into the feed bin, then
Feed bin is sealed, is extracted out in the feed bin and the raw material in the feed bin is sent into the gas-based shaft kiln after air；In the B
In, the sponge iron is sent into the tank body by first bellows；In the step C, the sponge in the tank body
Tie Tong crosses elephant trunk and mixes with auxiliary material, and material is by the second bellows feeding electric furnace after mixing.
Gas-based shaft kiln and system and method associated with electric furnace that the present invention is provided, improve gas-based shaft kiln structure, eliminate
Cooling section and its associated satellite equipment, reduce run duration of the material in gas-based shaft kiln；The sponge iron that gas-based shaft kiln is produced
During being delivered to electric furnace, heat waste is few, will not be oxidized, and has saved the power consumption that electric furnace melts point process；Storage tank is set,
For storing the sponge iron that gas-based shaft kiln is continuously discharged, for the continuous production of system provides guarantee, production efficiency is improve.
Brief description of the drawings
Fig. 1 is embodiment of the present invention gas-based shaft kiln and electric furnace combined system schematic diagram；
Fig. 2 is embodiment of the present invention gas-based shaft kiln and electric furnace method for combined use flow chart.
In figure：
1- feed bins；
2- gas-based shaft kilns, 201- preheating sections, 202- reduction sections；
3- storage tanks, 301- tank bodies, 302- material weight instrument, 303- support frames；
4- elephant trunks；5- auxiliary material pipelines；6- electric furnaces, 601- electric furnace tiling arrangements；
The bellowss of 701- first, the bellowss of 702- second；8- washers, 9- gas compressors；
10- preheaters；11- reburners.
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.
As shown in Figure 1, on the one hand, the embodiment of the present invention provides a kind of gas-based shaft kiln and electric furnace combined system, including feed bin
1st, gas-based shaft kiln 2, storage tank 3, elephant trunk 4, auxiliary material pipeline 5, electric furnace 6, the first bellows 701, the second bellows 702, washer
8th, gas compressor 9, preheater 10 and reburner 11.
Feed bin 1 is provided with discharging opening, and the discharging opening of feed bin is connected with the material inlet of gas-based shaft kiln.The embodiment of the present invention
Raw material is agglomerates or iron ore.After raw material enters feed bin 1, feed bin 1 is sealed, extract the air in feed bin 1 out, then will
Raw material sends into gas-based shaft kiln.Can so ensure that whole system does not have oxygen to enter, it is ensured that subsequent material will not be oxidized.
Gas-based shaft kiln 2 includes preheating section 201 and reduction section 202.Preheating section 201 is provided with material inlet and gas vent, also
Former section 202 is provided with also Primordial Qi entrance and material outlet.After raw material enters gas-based shaft kiln 2, by from bottom to top in the preheating section 201
Gas enters reduction section 202 after being preheated to uniform temperature, and the hot reducing gas being passed through in reduction section 202 and bottom reduces generation
The sponge iron product of heat.Compared with other gas-based shaft kilns, the gas-based shaft kiln of the embodiment of the present invention eliminates cooling section and its cooling
Process associated satellite equipment.
Storage tank 3 is located at the lower section of gas-based shaft kiln 2.Storage tank 3 includes tank body 301, material weight instrument 302 and support frame 303.Tank
Body 301 is provided with charging aperture and discharging opening.The material outlet of gas-based shaft kiln connects the charging of tank body by the first bellows 701
Mouthful.The outer wall of tank body 301 is formed by cast iron welding, and inwall is cast by fire resisting, temperature-resistant material.The lower section of tank body 301 is equipped with three
Material weight instrument 302, three material weight instrument 302 are equiangularly arranged in same level, and tank body 301 is to be flexible coupling with 302, is easy to expect weight instrument
302 weigh.Material weight instrument 302 is fixed on support frame 303.The data of the collection of material weight instrument 302 pass through PLC constantly incoming data storehouses,
Storage doses in tank body can be obtained the moment, electric furnace charging process stream speed is also can control.
The minimum volume volume of tank body 301 is determined by formula V=Q × t, and in formula, Q is produced for gas-based shaft kiln unit interval sponge iron
Amount, t is period of storage；T=t1+t2-t3+t4+tother, in formula, t1It is electric furnace charge time, t2Between timesharing being melted for electric furnace, t3For
Electric furnace feeds and molten point of process overlapping time, t of electric furnace4It is electric furnace electrode replacing construction, totherDuring for other Maintenance and Repair of electric furnace
Between.
Installation expects that the meaning of weight instrument 302 is：First, may need to add because hot sponge iron carries out molten point into electric furnace
Enter additive or other auxiliary materials, therefore the addition or blanking speed of the additive or other auxiliary materials need to be in known warm
Sponge iron blanking speed on the premise of carry out, material weight instrument then becomes monitoring and adjusts the capital equipment of the index.Second,
Storage tank is the important step for being connected gas-based shaft kiln and electric furnace, and its storing amount can produce certain to gas-based shaft kiln and electric furnace production
Guidance and adjustment effect, be precondition that gas-based shaft kiln-electric furnace production process is carried out continuously.
Elephant trunk 4 is used to connect storage tank 3 and electric furnace 6, and the sponge iron in tank body is delivered into electric furnace 6.When last batch enters
After molten point of furnace charge terminates in electric furnace, during to being fed again in electric furnace, the sponge iron of heat is discharged into elephant trunk below by storage tank 3
4, fallen into electric furnace 6 by the sponge iron self gravitation of heat.Elephant trunk 4 is made up of three-decker, and its outer layer is that wall thickness is 10mm steel
Plate weld is formed, and intermediate layer is filled by heat-resistant insulation material, and heat-resistant insulation material is heat-preservation cotton, such as mineral wool, rock wool, thickness
About 100mm, innermost layer is cast iron materials, and thickness is 10mm, and inner surface by SHS technologies be coated with thickness about 5mm it is thick it is wear-resisting,
Exotic material, such as Al2O3Ceramic material.Depending on the diameter of elephant trunk 4 should send flow according to the heat of sponge iron.Elephant trunk 4 is inclined
Set, it is 15~30 ° with the angle of horizontal plane, during specific angle send flow and actual production process by the maximum heat of sponge iron
Storage tank 3 is determined with the distance of electric furnace 4 and position.
Compared with traditional elephant trunk, without nitrogen cooling system, elephant trunk intermediate layer is solid material to elephant trunk of the invention 4, both
It is able to ensure that heat send sponge iron temperature losses of the process low, can also promotes sponge iron to convey steadily in the long term.The device has wear-resisting, resistance to height
Temperature, easily changeable advantage.
Elephant trunk 4 connects the charging aperture of electric furnace 6 by the second bellows 702, and system will not be made with the rotation for ensureing electric furnace
Into influence.
Auxiliary material pipeline 5 is provided with the lower section of elephant trunk 4, auxiliary material pipeline 5 converges with the outlet of elephant trunk 4, forms the form of threeway.
Auxiliary material pipeline 5 is provided with switching device, can control charging rate.
Electric furnace 6 is located at the lower section of storage tank 4.Electric furnace 6 is used for molten point of material, and it includes electric furnace tiling arrangement 601.Electric furnace
Material receiving pipe is welded with 6 bell, material feeding inside pipe wall is coated with heat-resistant, wear-resistant layer, and tube wall outside is carried out cold by bell cooling water system
But, prevent material receiving pipe temperature too high, extend its working life.
Washer 8 includes gas access, the first gas exit and the second gas exit.The gas vent of gas-based shaft kiln 2 connects
Connect the gas access of washer 8.Washer 8 obtains coal gas after being used for the top gas wash cooling for producing gas-based shaft kiln.
Preheater 10 includes gaseous mixture entrance and gas vent, and the coal gas of the first gas exit discharge accounts for coal gas amount volume
70%~80%, after the coal gas of the first gas exit discharge mixes with natural gas, mixed gas are obtained, mixed gas are by preheater
Gaseous mixture entrance enters preheater 10.
Gas compressor 9 includes gas access and gas vent, the second gas exit connection gas compressor of washer 8
9 gas accesses, pressurize to remaining coal gas.
Reburner 11 includes fuel gas inlet, gas access and also Primordial Qi outlet.Mixed gas after preheating pass through reburner
Gas access enter reburner 11, after nickel matter catalytic reaction tube group carries out catalytic cracking reaction generate 850~950 DEG C also
Primordial Qi.The also Primordial Qi of generation is passed through gas-based shaft kiln by the also Primordial Qi entrance of gas-based shaft kiln.Coal gas after pressurization is passed through reburner 11
Burnt.
Bellows is scalable, when the equipment that it is connected is moved, the flexible safety that can ensure system of bellows.The present invention
First bellows 701 and the equal heat-resistant, wear-resistant of the second bellows 702 in embodiment, its two ends is equipped with flange, in flange connections
Setting nitrogen protection device can prevent air from leaking into causes the sponge iron of heat to be oxidized.
On the other hand, method associated with a kind of said system of embodiment of the present invention offer, comprises the following steps：
1st, raw material is sent into feed bin, then feed bin is sealed, extracted out in feed bin and send the raw material in feed bin after air
Enter gas-based shaft kiln.
2nd, raw material is carried out into reduction reaction, generation high-temperature sponge iron (being more than 600 DEG C) and top gas in gas-based shaft kiln.
The 3rd, sponge iron is sent into the weight of the sponge iron of storage in the tank body of storage tank, tank body by the first bellows by expecting
Weight instrument is determined.
4th, after the last consignment of product of electric furnace is discharged, the sponge iron in tank body is mixed by elephant trunk and auxiliary material, after mixing
Material by the second bellows send into electric furnace.
5th, coal gas is obtained after the top gas being carried out into wash cooling.
6th, preheater is sent into after the gas that percent by volume in the coal gas is 70%~80% is mixed with natural gas to enter
Row preheating, another part coal gas feeding gas compressor is pressurizeed.
7th, the mixed gas after preheating are sent into reburner, carries out catalytic cracking reaction, 850~900 DEG C of generation also Primordial Qi；
The fuel inlet of the coal gas feeding reburner after pressurization is burnt.
8th, the reduction pneumatic transmission is entered into gas-based shaft kiln.
Because molten point of electric furnace and charging process are present, the regular hour is poor, i.e., it is not in absolute sense that electric furnace melts point process
Continuous process, need to set up a storage tank storing gas-based shaft kiln and continuously produce generation in gas-based shaft kiln and electric furnace intermediate link
The sponge iron of heat.Three material weights that the weight of the hot sponge iron of storage is arranged by the angle such as same level face below in storage tank
Instrument is determined and is transferred into database by PLC, and its data can constantly be monitored.
Electric furnace stops charging after loading certain doses, into molten point of process.Electric furnace charging process can be deposited with molten point process
In certain overlapping time, i.e., molten point, but charging process and molten point of process time are proceeded by after electric furnace loads certain doses
Be completely superposed, i.e., side charging, Bian Rongfen, go out molten steel and electroslag is then unreasonable.
After molten point finishes, slowly fascinate electric furnace, and discharge molten steel and electric furnace electroslag playback, it is necessary to more close to rear electric furnace is finished
Suspend when changing electrode or Maintenance and Repair to electric furnace charge, then start to add to electric furnace without changing electrode or Maintenance and Repair operation
Material, into molten point of process of this batch electric furnace.
It is worth noting that, the method and system include but is not limited to hydrogen shaft furnace-electric furnace Joint Production treatment iron essence
Ore deposit, vanadium titano-magnetite, lateritic nickel ore, high-phosphorus hematite, other mineral each fall within protection of the invention using the method and system
Scope.
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 and electric furnace combined system, it is characterised in that including gas-based shaft kiln, storage tank, elephant trunk and electric furnace；
The gas-based shaft kiln includes material inlet, material outlet, gas vent and goes back Primordial Qi entrance；
The storage tank includes tank body, material weight instrument and support frame, and the tank body includes charging aperture and discharging opening, and the material weight instrument is consolidated
It is scheduled on support frame as described above, the tank body is fixed on the material weight instrument；
The electric furnace includes charging aperture；
The gas-based shaft kiln material outlet connects the tank body charging aperture, and the tank body discharging opening connects the electric furnace by elephant trunk
Charging aperture, the tank body be located at the gas-based shaft kiln lower section, the electric furnace be located at the tank body lower section.
2. system according to claim 1, it is characterised in that further include washer, preheater and reburner,
The washer includes gas access, the first gas exit；
The preheater includes gaseous mixture entrance and gas vent；
The reburner includes gas access and also Primordial Qi outlet；
The gas-based shaft kiln gas vent connects the washer gas access, and the connection of the gas exit of the washer first is described
Preheater gaseous mixture entrance, the preheater gas vent connects the reburner gas access, and the reburner also Primordial Qi goes out
The mouth connection gas-based shaft kiln also Primordial Qi entrance.
3. system according to claim 2, it is characterised in that further include gas compressor, the gas compressor
Including gas access and gas vent；The washer includes the second gas exit, and the reburner includes fuel gas inlet, described
The gas exit of washer second connects the gas compressor gas access, and the gas compressor gas vent connection is described to be turned
Change stove fuel gas inlet.
4. system according to claim 1, it is characterised in that further include feed bin, the feed bin includes discharging opening, institute
State feed bin discharge hole and connect the gas-based shaft kiln material inlet.
5. system according to claim 1, it is characterised in that the gas-based shaft kiln material outlet is connected by the first bellows
Connect the tank body charging aperture, the elephant trunk connects the electric furnace charging aperture by the second bellows, first bellows and the
The two ends of two bellowss are provided with flange.
6. system according to claim 5, it is characterised in that the flange of first bellows and the second bellows sets
There is nitrogen protection device.
7. system according to claim 1, it is characterised in that further include auxiliary material pipeline, the auxiliary material pipeline and institute
State elephant trunk connection.
8. method associated with a kind of any described system of claim 1~7, it is characterised in that including step：
A, by raw material gas-based shaft kiln with also Primordial Qi reduced, generate sponge iron and top gas；
B, by the tank body of sponge iron feeding storage tank, the weight of the sponge iron of storage is determined by material weight instrument in tank body；
C, when electric furnace last consignment of product discharge after, the sponge iron in the tank body is sent into electric furnace by elephant trunk.
9. method according to claim 8, it is characterised in that further include step：
D, the top gas is carried out into wash cooling after obtain coal gas；
E, it is that 70%~80% gas and natural gas mix acquisition mixed gas by percent by volume in the coal gas, will be described
Mixed gas are sent into the preheater and are preheated；Residual gas are sent into the gas compressor and are pressurizeed；
F, the mixed gas after preheating are sent into the reburner, carry out catalytic cracking reaction, generation also Primordial Qi；After pressurization
The fuel inlet that coal gas sends into the reburner is burnt；
G, by it is described reduction pneumatic transmission enter gas-based shaft kiln.
10. method according to claim 8, it is characterised in that included step before the step A：Raw material is sent into
The feed bin, then seals to feed bin, extracts out in the feed bin and the raw material in the feed bin is sent into the gas after air
Base shaft furnace；In the B, the sponge iron is sent into the tank body by first bellows；In the step C, institute
The sponge iron stated in tank body is mixed by elephant trunk with auxiliary material, and material is by the second bellows feeding electric furnace after mixing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114921603A (en) * | 2022-05-31 | 2022-08-19 | 中冶京诚工程技术有限公司 | Spiral type hot state direct reduced iron conveying device and method |
| CN114921605A (en) * | 2022-05-31 | 2022-08-19 | 中冶京诚工程技术有限公司 | Horizontal vibration type hot direct reduced iron conveying device and method |
| CN115404339A (en) * | 2022-07-28 | 2022-11-29 | 北京氢冶科技有限公司 | Method for developing and utilizing oolitic high-phosphorus iron ore |
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| CN114921605A (en) * | 2022-05-31 | 2022-08-19 | 中冶京诚工程技术有限公司 | Horizontal vibration type hot direct reduced iron conveying device and method |
| CN115404339A (en) * | 2022-07-28 | 2022-11-29 | 北京氢冶科技有限公司 | Method for developing and utilizing oolitic high-phosphorus iron ore |
| CN115404339B (en) * | 2022-07-28 | 2024-04-09 | 北京氢冶科技有限公司 | Method for developing and utilizing oolitic high-phosphorus iron ore |
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