CN107974525A - A kind of reduction shaft furnace - Google Patents
A kind of reduction shaft furnace Download PDFInfo
- Publication number
- CN107974525A CN107974525A CN201711292331.7A CN201711292331A CN107974525A CN 107974525 A CN107974525 A CN 107974525A CN 201711292331 A CN201711292331 A CN 201711292331A CN 107974525 A CN107974525 A CN 107974525A
- Authority
- CN
- China
- Prior art keywords
- reduction
- cooling
- shaft furnace
- cooling tank
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
Abstract
The present invention provides a kind of reduction shaft furnace, including reduction section, also Primordial Qi inlet duct, feeder sleeve, cooling gas inlet duct, cooling gas discharger and cooling tank；Also Primordial Qi inlet duct includes also Primordial Qi bustle pipe and reduction gas jets, and also Primordial Qi bustle pipe is connected with reduction gas jets, and reduction gas jets are evenly provided in the same horizontal position of reduction section；Feeder sleeve is connected with reduction section and cooling tank respectively, feeder sleeve insertion cooling tank；Cooling tank is the cylindrical container of inner lining refractory, equipped with conical lower portion and blanking pipe；Cooling gas inlet duct includes air inlet bustle pipe and nozzle of air supply, and air inlet bustle pipe is connected with nozzle of air supply, and nozzle of air supply is evenly provided in the same horizontal position of conical lower portion；Cooling down gas discharger includes exhaust bustle pipe and outlet, and exhaust bustle pipe is connected with outlet, and outlet is evenly provided in the same horizontal position on cooling tank top.The present invention can guarantee that furnace charge cooling is smoothed out, and prevent that pelletizing blocks outlet in cooling tank.
Description
Technical field
The invention belongs to technical field of metallurgical equipment, and in particular, to a kind of reduction shaft furnace.
Background technology
China is steel big producer, and China mainland crude steel yield is 8.04 hundred million tons within 2015, accounts for global total output
49.5%.But steel industry unreasonable structure, iron steel than it is high, electric steel ratio is small, the special rolling shapes in part need to also be into
Mouthful, process for making is based on the long flow of blast furnace ironmaking-pneumatic steelmaking, and energy consumption is big, production cost is high, economic benefit
Difference, is increasingly not suitable with the development of industry, and by eliminating successively, current direct reduced iron technology obtains in smelting industry
Faster development has been arrived, has obtained more universal application, smelting furnace used in direct reduced iron technology is tunnel oven, turns at present
Bottom stove etc..The defects of tunnel oven, rotary hearth furnace are due in structure, in use there is also some problems, i.e.,：Wall scroll production line
Yield is small, productivity is low, seriously polluted low etc. with direct-reduction Iron grade.
Gas-based shaft kiln directly reduced technique mainly has Midrex and HYL, and also Primordial Qi is produced using gas renormalizing method, into
And reducing iron ore.Two kinds of technique shaft furnaces belong to convection type moving bed, are made of reduction section and cooling section two large divisions.Ore
Load in shaft furnace and be first preheated during decline, subsequent iron ore carries out reduction reaction, enters cooling section after forming sponge iron.
Sponge iron is cooled to close to after environment temperature into cooling section in cooling air-flow, is discharged out of the furnace by bottom discharging device.By
Reduction section and cooling section and proper identification of boundaries be not present in existing process, cooling gas air extractor with and Primordial Qi
Nozzle standoff distance is small, causes cooling gas not extracted out in time on cooling section top and enter reduction section, not only reduces reduction
The oxidizability of the content of effective gas and increase also Primordial Qi in gas, eventually influences degree of metalization and the reduction of ton iron of sponge iron
Gas consumption.In the prior art, cooling section is the region that construction is most complicated in stove, and cooling gas collecting hood, cooling gas are set in stove
The labyrinths such as distributor, easily occur blockage problem, and equipment is difficult to carry out maintenance in stove, reduce working day in equipment year.
The content of the invention
The purpose of the present invention is to solve in gas-based shaft kiln directly reduced ironmaking technology, reduction section is with cooling down in shaft furnace
Section is interconnected, and causes cool down gas on a small quantity and enters reduction section, reduces and effective gas component and add gas consumption in Primordial Qi
The problem of, while solve the problems, such as that cooling gas air extractor is easily stifled.
Reduction shaft furnace provided by the invention, including reduction section, also Primordial Qi inlet duct, feeder sleeve, cooling gas inlet duct,
Cool down gas discharger and cooling tank；
The also Primordial Qi inlet duct includes also Primordial Qi bustle pipe and reduction gas jets, the also Primordial Qi bustle pipe and the reduction
Gas jets are connected, and the reduction gas jets are evenly provided in the same horizontal position of the reduction section；
The feeder sleeve is connected with the reduction section and the cooling tank respectively, and the feeder sleeve is inserted into the cooling tank；
The cooling tank is the cylindrical container of inner lining refractory, equipped with conical lower portion and blanking pipe；
The cooling gas inlet duct includes air inlet bustle pipe and nozzle of air supply, the air inlet bustle pipe and the nozzle of air supply phase
Even, the nozzle of air supply is evenly provided in the same horizontal position of the conical lower portion；
The cooling gas discharger includes exhaust bustle pipe and outlet, and the exhaust bustle pipe is connected with the outlet,
The outlet is evenly provided in the same horizontal position on the cooling tank top.
In some embodiments of the invention, the reduction shaft furnace further includes washer and compressor, the washer point
It is not connected with the exhaust bustle pipe of the cooling gas discharger and the compressor, the compressor also cools down gas air inlet with described
The air inlet bustle pipe of device is connected.
In some embodiments of the invention, the top of the feeder sleeve is provided with discharge device.
In some embodiments of the invention, the reduction shaft furnace further includes spiral discharging machine, the spiral discharging machine with
The blanking pipe of the cooling tank is connected.
In some embodiments of the invention, a diameter of 0.8m-1.5m of the feeder sleeve, length 1m-3m.
In some embodiments of the invention, the depth that the feeder sleeve is inserted into the cooling tank is 0.2m-0.5m.
In some embodiments of the invention, umbellate form backgauge is equipped between the tank skin of the feeder sleeve and the cooling tank
Plate, the umbellate form striker plate are equipped with circular hole.
In some embodiments of the invention, the umbellate form striker plate is made of high temperature stainless steel material.
In some embodiments of the invention, a diameter of 1mm-2mm of the circular hole, quantity are 100-2000.
In some embodiments of the invention, the nozzle of air supply of the cooling gas inlet duct and the cooling gas discharge dress
The outlet put has 10-30 respectively.
The present invention is divided into two devices by setting cooling tank in shaft furnace lower part, by reduction shaft furnace section and cooling section, middle
Connected by feeder sleeve, due to furnace charge stock column resistance, prevent cooling gas from entering reduction section and influencing reduction reaction.
For the present invention according to material physical characteristic, cooling tank top forms one without material space, prevents gas outlet to be blocked, protects
Furnace charge cooling has been demonstrate,proved to be smoothed out.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of reduction shaft furnace in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and examples, the embodiment of the present invention is described in more details, so as to energy
The advantages of enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and reality
Example is applied to be for illustrative purposes only, rather than limitation of the present invention.
Fig. 1 show currently preferred reduction shaft furnace, including reduction section 1, also Primordial Qi inlet duct 2, feeder sleeve 3, cold
But gas inlet duct 4, cooling gas discharger 5, cooling tank 6, washer 7, compressor 8 and spiral discharging machine 9.
Also Primordial Qi inlet duct 2 includes also Primordial Qi bustle pipe and reduction gas jets, and also Primordial Qi bustle pipe is connected with reduction gas jets,
Reduction gas jets are evenly provided in the same horizontal position of reduction section 1.
Feeder sleeve 3 is connected with reduction section 1 and cooling tank 6 respectively, feeder sleeve insertion cooling tank 6.The top installation of feeder sleeve 3
There is discharge device 31, the effect of discharge device 31 is in order to promote hot sponge iron smoothly to enter cooling tank 6, in the present invention
In other embodiment, discharge device 31 can be also not provided with.
In the preferred embodiment of the invention, a diameter of 0.8m-1.5m, the length 1m-3m of feeder sleeve, in the diameter and
Under the length, hot sponge iron can smoothly enter cooling tank 6 in, and material column can prevent cooling gas enter reduction section 1 and
Also Primordial Qi enters cooling tank 6.Further, it is 0.05MPa- by the pressure for making 1 lower part of reduction shaft furnace section and cooling tank 6
0.08MPa, ensures reduction shaft furnace section 1 and cooling tank 6 without pressure difference, can effectively prevent cooling gas enter top reduction shaft furnace section 1 and
Also Primordial Qi enters cooling tank 6.Since furnace charge can only be distributed in below 3 end of feeder sleeve, and certain slope angle is formed, cool down the row of gas
No material space can be formed between outlet and furnace charge, effectively prevents furnace charge from entering cooling gas outlet and blocking.
In the preferred embodiment of the invention, the depth that feeder sleeve 3 is inserted into cooling tank 6 is 0.2m-0.5m, more preferably
0.3m, can effectively prevent cooling gas from entering reduction section 1 and go back Primordial Qi and enter cooling tank 6.
Cooling tank 6 is the cylindrical container of inner lining refractory, equipped with conical lower portion and blanking pipe.
In the preferred embodiment of the invention, umbellate form striker plate, umbellate form are equipped between the tank skin of feeder sleeve 3 and cooling tank 6
Striker plate is equipped with circular hole.Umbellate form striker plate is used to prevent under unexpected situation that large granular materials to block cooling gas outlet.Into one
Preferably, a diameter of 1mm-2mm of circular hole, the quantity of circular hole is 100-2000 to step, preferably can prevent large granular materials from blocking up
Plug cooling gas outlet.Umbellate form striker plate is preferably made of high temperature stainless steel material.
Cooling gas inlet duct 4 includes air inlet bustle pipe and nozzle of air supply, and air inlet bustle pipe is connected with nozzle of air supply, nozzle of air supply
It is evenly provided in the same horizontal position of conical lower portion.
Cooling down gas discharger 5 includes exhaust bustle pipe and outlet, and exhaust bustle pipe is connected with outlet, and outlet is equably
It is arranged in the same horizontal position on 6 top of cooling tank.Cooling tank 6 is equipped with blanking pipe 61.
In the preferred embodiment of the invention, the nozzle of air supply of cooling gas inlet duct 4 and the row of cooling gas discharger 5
Outlet has 10-30 respectively.
Washer 7 is connected with the exhaust bustle pipe and compressor 8 for cooling down gas discharger 5 respectively, and compressor 8 is also with cooling down gas
The air inlet bustle pipe of inlet duct 4 is connected.
Spiral discharging machine 9 is connected with the blanking pipe 61 of cooling tank 6.
It should be noted that it may not include washer 7, compressor 8 and spiral discharging machine in other embodiments of the present invention
9, configured according to the needs of actual process.
Furnace charge at the top of shaft furnace by adding, and into the reduction section 1 of shaft furnace, also Primordial Qi goes back Primordial Qi by also Primordial Qi inlet duct 2
Bustle pipe and reduction gas jets, discharge out of the furnace into shaft furnace, and through furnace roof, and air-flow from bottom to top is formed in reduction section 1.Ore
Preheating and reduction process are completed in this stock reduces air-flow.Sponge iron after the completion of reduction is under the effect of gravity downwards through feeder sleeve
3 enter cooling tank 6.
As shown in the figure, cooling tank 6 is vertical, refractory lining a container, the container have a conical lower portion and
One blanking pipe.In this embodiment, material flows under the effect of gravity, and installs spiral discharging machine 9 in 61 terminal of blanking pipe,
Can be with control material discharging speed.Cooling gas needed for cooling tank by the container conical lower portion cooling gas inlet duct 4 into
Gas bustle pipe is sprayed into tank with nozzle of air supply, cools down high temperature bulk material, then the exhaust bustle pipe via cooling gas discharger 5 and row
Outlet discharges outside the tank.All compress to send to cooling tank 6 after the washed cooling of device 7 dedusting of High-temperature cooling gas containing flue dust and circulate
Utilize.Currently preferred cooling gas is N2。
In the present invention, the reduction gas jets of Primordial Qi inlet duct 2, the nozzle of air supply of cooling gas inlet duct 4, cooling gas are gone back
The outlet of discharger 5 is preferably set by circumference, i.e., the circle around furnace wall composition is symmetrical arranged.
Sponge iron after cooling is through blanking pipe 61 to spiral discharging machine 9, under controlling spiral discharging machine 9 controllable
Expect speed, and then control the total production capacity of shaft furnace, cooling gas flow is depending on total production capacity.Tremie pipe can be adjusted
Length and diameter so that material column prevent cooling gas outflow.The sponge iron of discharge is transported through charging carriage.
Below with reference to specific embodiment, the present invention will be described.Institute's taking technique condition value is in following embodiments
Exemplary, its desirable number range, for especially not dated technological parameter, can refer to often as shown in foregoing summary
Rule technology carries out.Detection method used in following embodiments is the detection method of industry routine.
Embodiment
The present embodiment is using the reduction shaft furnace processing iron ore concentrate acid pellet shown in Fig. 1.
The iron ore concentrate acid pellet that granularity is 8mm-20mm completes preheating by being added at the top of shaft furnace in stove in reduction section 1
And reduction process, wherein high temperature reduction gas spray into shaft furnace by also Primordial Qi inlet duct 2.The high-temperature sponge iron pelletizing formed after reduction
Enter cooling tank 6 through shaft furnace lower part feeder sleeve 3,3 height of feeder sleeve is 2m, a diameter of 1m, and the depth of insertion cooling tank 6 is
0.3m, and pelletizing material is charged with feeder sleeve 3, pelletizing is evenly distributed in around cooling tank 6, and forms certain material
Slope angle, charge level top then forms one and is arranged in the top of cooling tank 6 without material space, cooling gas discharger 5 in cooling tank 6,
It can prevent globular sponge iron from entering the outlet of cooling gas and blockage problem occurs, ensure that cooling gas can smoothly discharge cooling
Tank 6.
In washer 7, High-temperature cooling gas after dedusting to the room temperature that cools down, after being pressurizeed by compressor 8 by cool down gas into
Device of air 4 is sprayed into cooling tank 6, and high-temperature sponge iron pelletizing is cooled down in uphill process.What is formed contains flue dust
450 DEG C of High-temperature cooling gas through cool down gas discharger 5 discharge cooling tank 6 outside, then washed device 7 cool down de-dusting cycle profit
With.Cool to 60 DEG C of sponge iron pelletizing by blanking pipe 61 to cooling tank spiral discharging machine 9 at, it is spiral by cooling tank
Discharging machine 9 controls discharging speed, and discharge sponge iron pelletizing is transported by charging carriage.
1 lower part of reduction shaft furnace section and 6 gas pressure of cooling tank are equal, are 0.06MPa, ensure under reduction shaft furnace section 1
Portion and cooling tank 6 prevent cooling gas from entering top reduction shaft furnace section 1 and go back Primordial Qi and enter cooling tank 6 without pressure difference.The present embodiment is cold
But gas uses N2Cooling, low pressure operation, can avoid cooling gas in cooling tank from being discharged by blanking pipe, improve cooling gas circulation profit
With rate, production cost is reduced.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and not to embodiment
Limit.For those of ordinary skill in the field, other multi-forms can also be made on the basis of the above description
Change or variation.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out apparent
Change or change still in protection scope of the present invention among.
Claims (10)
1. a kind of reduction shaft furnace, it is characterised in that including reduction section, also Primordial Qi inlet duct, feeder sleeve, cooling gas air inlet dress
Put, cool down gas discharger and cooling tank；
The also Primordial Qi inlet duct includes also Primordial Qi bustle pipe and reduction gas jets, the also Primordial Qi bustle pipe and the reduction gas blowout
Mouth is connected, and the reduction gas jets are evenly provided in the same horizontal position of the reduction section；
The feeder sleeve is connected with the reduction section and the cooling tank respectively, and the feeder sleeve is inserted into the cooling tank；
The cooling tank is the cylindrical container of inner lining refractory, equipped with conical lower portion and blanking pipe；
The cooling gas inlet duct includes air inlet bustle pipe and nozzle of air supply, and the air inlet bustle pipe is connected with the nozzle of air supply,
The nozzle of air supply is evenly provided in the same horizontal position of the conical lower portion；
The cooling gas discharger includes exhaust bustle pipe and outlet, and the exhaust bustle pipe is connected with the outlet, described
Outlet is evenly provided in the same horizontal position on the cooling tank top.
2. reduction shaft furnace according to claim 1, it is characterised in that the reduction shaft furnace further includes washer and compression
Machine, the washer are connected with the exhaust bustle pipe of the cooling gas discharger and the compressor respectively, and the compressor is also
It is connected with the air inlet bustle pipe of the cooling gas inlet duct.
3. reduction shaft furnace according to claim 1, it is characterised in that the top of the feeder sleeve is provided with discharge device.
4. reduction shaft furnace according to claim 1, it is characterised in that the reduction shaft furnace further includes spiral discharging machine, institute
The blanking pipe that spiral discharging machine is stated with the cooling tank is connected.
5. reduction shaft furnace according to claim 1, it is characterised in that a diameter of 0.8m-1.5m of the feeder sleeve, length
For 1m-3m.
6. reduction shaft furnace according to claim 1, it is characterised in that the depth that the feeder sleeve is inserted into the cooling tank is
0.2m-0.5m。
7. reduction shaft furnace according to claim 1, it is characterised in that between the tank skin of the feeder sleeve and the cooling tank
Equipped with umbellate form striker plate, the umbellate form striker plate is equipped with circular hole.
8. reduction shaft furnace according to claim 7, it is characterised in that the umbellate form striker plate uses high temperature stainless steel material
Make.
9. reduction shaft furnace according to claim 7, it is characterised in that a diameter of 1mm-2mm of the circular hole, quantity are
100-2000.
10. reduction shaft furnace according to claim 1, it is characterised in that it is described cooling gas inlet duct nozzle of air supply and
The outlet of the cooling gas discharger has 10-30 respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292331.7A CN107974525A (en) | 2017-12-08 | 2017-12-08 | A kind of reduction shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711292331.7A CN107974525A (en) | 2017-12-08 | 2017-12-08 | A kind of reduction shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107974525A true CN107974525A (en) | 2018-05-01 |
Family
ID=62009744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711292331.7A Pending CN107974525A (en) | 2017-12-08 | 2017-12-08 | A kind of reduction shaft furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107974525A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143846A (en) * | 2020-09-25 | 2020-12-29 | 西安建筑科技大学 | Gas-based reduction shaft furnace |
| CN112981030A (en) * | 2021-02-23 | 2021-06-18 | 中冶南方工程技术有限公司 | Treatment furnace |
| CN115354148A (en) * | 2022-07-22 | 2022-11-18 | 重庆赛迪热工环保工程技术有限公司 | Cooling system and method for metallized pellets of rotary hearth furnace |
| CN116516093A (en) * | 2023-05-22 | 2023-08-01 | 河钢集团有限公司 | Production device for direct reduced iron |
-
2017
- 2017-12-08 CN CN201711292331.7A patent/CN107974525A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143846A (en) * | 2020-09-25 | 2020-12-29 | 西安建筑科技大学 | Gas-based reduction shaft furnace |
| CN112981030A (en) * | 2021-02-23 | 2021-06-18 | 中冶南方工程技术有限公司 | Treatment furnace |
| CN115354148A (en) * | 2022-07-22 | 2022-11-18 | 重庆赛迪热工环保工程技术有限公司 | Cooling system and method for metallized pellets of rotary hearth furnace |
| CN115354148B (en) * | 2022-07-22 | 2023-11-28 | 重庆赛迪热工环保工程技术有限公司 | Cooling system and method for metallized pellets of rotary hearth furnace |
| CN116516093A (en) * | 2023-05-22 | 2023-08-01 | 河钢集团有限公司 | Production device for direct reduced iron |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107974525A (en) | A kind of reduction shaft furnace | |
| CN102337369B (en) | High-wind-temperature rotational flow injection disturbance melting reduction and prereduction combination device and method | |
| CN106011341B (en) | The method that blast furnace process schreyerite carries high-coal ratio | |
| CN101709341A (en) | Method for treating iron-containing waste materials in iron and steel plant | |
| CN206607253U (en) | A kind of reduction shaft furnace | |
| CN108504802A (en) | A kind of blast furnace blowing furnace retaining material and its application method | |
| CN106636504B (en) | The method for improving schreyerite blast furnace gas utilization rate | |
| CN108315514B (en) | Blast furnace blow-in charging method | |
| CN104711418A (en) | Method for using metallurgical iron-bearing dust in iron-making | |
| CN104404178A (en) | Molten slag dry granulation and waste heat recovery system | |
| CN104630407B (en) | A kind of entire body external heat flame-insulating type rotary kiln | |
| CN113174449A (en) | Smelting method for efficiently discharging zinc metal in blast furnace | |
| CN105154662A (en) | Rare earth mineral powder calcination decomposition systems and processes thereof | |
| CN202279831U (en) | High blast temperature swirl injection perturbation smelting reduction and pre-reduction integrated device | |
| CN109536663B (en) | Rotary kiln gas-based reduction-total oxygen molten pool smelting iron-making method | |
| CN207738781U (en) | A kind of reduction shaft furnace | |
| CN106319115A (en) | Method for quick repair of blast furnace hearth local damage | |
| CN107354259A (en) | A kind of coal-based direct reduction shaft furnace and the method smelted using the shaft furnace | |
| CN106381355A (en) | Ironmaking method adopting high-proportion South African ore | |
| CN106755693A (en) | Hot charging gas-based shaft kiln system and method | |
| CN207760370U (en) | The blast-furnace shaft structure of taper mutation | |
| CN207760369U (en) | Blast-furnace shaft structure with Varying-thickness liner | |
| CN206607255U (en) | Hot charging gas-based shaft kiln system | |
| CN104831070A (en) | Smelting reduction metallurgical method | |
| CN106244750B (en) | The method of blast furnace process schreyerite under high-coal ratio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |