CN207738782U - A kind of shaft furnace - Google Patents
A kind of shaft furnace Download PDFInfo
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- CN207738782U CN207738782U CN201721696801.1U CN201721696801U CN207738782U CN 207738782 U CN207738782 U CN 207738782U CN 201721696801 U CN201721696801 U CN 201721696801U CN 207738782 U CN207738782 U CN 207738782U
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- shaft furnace
- storage tank
- tremie pipe
- furnace
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Abstract
The utility model provides a kind of shaft furnace, and the top of shaft furnace is equipped with top charging equipment, and the top of shaft furnace is equipped with top gas device for transferring.Top charging equipment includes hopper, storage tank and tremie pipe；Top gas device for transferring includes atomization temperature-reduction device, furnace roof gas delivery line and tedge.The top gas of the utility model is discharged from top, and shaft furnace charge level iron ore concentrate acid pellet can be improved to 0.5m or more, and charge level increases the dischargeable capacity 5% 10% that improve shaft furnace.Persistently have material in the utility model in storage tank, and through tremie pipe be conveyed into shaft furnace, it can be achieved that shaft furnace charging serialization, and can ensure in shaft furnace that charge level is stablized in sustained height, without increasing monitoring material position equipment.
Description
Technical field
The utility model belongs to technical field of metallurgical equipment, and in particular, to one kind being equipped with top charging equipment and stove
The shaft furnace of top gas device for transferring.
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, for iron steel than 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, gas-based shaft kiln directly reduced technology is as main non-blast furnace ironmaking skill
Art foreign countries obtained ripe application, have low energy consumption, sintering, coking two highly energy-consumings, the height being related to without blast furnace ironmaking
Process is polluted, short, the effects of energy saving and emission reduction clear superiority with flow is to improve steel products structure, improves steel products quality,
Realize the important production technology that cleaning is smelted.
Top charging equipment is the key equipment for being reduced directly shaft furnace, and the performance quality of work directly influences shaft furnace energy
No normal production.Shaft furnace needs installation level-sensing device to be monitored the material position in stove in carrying out serialization charging process, due to
Top gas dustiness is big, and there are errors for the level-sensing devices such as laser, radar monitoring result, and traditional ray level-sensing device has radiation
Property, personnel safety is influenced big.For large-scale shaft furnace, top gas can influence shaft furnace top coal gas flow point by the discharge of furnace roof side
Cloth causes the heat exchange of top furnace charge and also Primordial Qi, chemical reaction uneven, and product sponge iron consumption reduction tolerance per ton is high, and
And dustiness is high in top gas, increases the load of follow-up cooling dust-removing process equipment.
Utility model content
In view of the deficiencies of the prior art, the utility model provides one kind and being equipped with top charging equipment and top gas discharge
The shaft furnace of equipment.The purpose of this utility model is to avoid coal gas from going partially to optimize shaft furnace top gas fluid distrbution, reduces furnace roof
Dust content in gas, while improving the dischargeable capacity of shaft furnace.
The utility model provides a kind of shaft furnace, and the top of the shaft furnace is equipped with top charging equipment, the top of the shaft furnace
End is equipped with top gas device for transferring；
The top charging equipment includes hopper, storage tank and tremie pipe, the storage tank respectively with the hopper
It is connected with the tremie pipe；The top of the storage tank is equipped with sealing valve, and the top of the storage tank is equipped with nitrogen purging
Pipe, the lower part of the storage tank is equipped with level-sensing device；The tremie pipe has multiple, is evenly provided on the same of the furnace wall in shaft furnace
On one horizontal position；Material-loosing apparatus is installed, the bottom end of the tremie pipe is straight down on the tremie pipe；
The top gas device for transferring includes atomization temperature-reduction device, furnace roof gas delivery line and tedge；The atomization cooling
Device is mounted in the shaft furnace, and the atomization temperature-reduction device includes ring stainless steel water pipe and nozzle sprayer, the nozzle
Sprayer is mounted on the ring stainless steel water pipe；The furnace roof gas delivery line has multiple, is evenly provided on the shaft furnace
Top；The furnace roof gas delivery line is connected with the tedge；Thermocouple is installed on the tedge, the thermocouple with
The atomization temperature-reduction device is connected by temperature detection feedback element.
In some embodiments of the utility model, the tremie pipe includes connected vertical tube and inclined tube, the inclined tube with
The angle of horizontal direction is 55 ° -70 °.
In some embodiments of the utility model, the center of the bottom end of the tremie pipe and the shaft furnace, the furnace wall
Between horizontal distance it is equal, the bottom end of the tremie pipe at a distance from the shaft furnace top be 1m-1.5m.
In some embodiments of the utility model, a diameter of 150mm-250mm of the tremie pipe.
In some embodiments of the utility model, a diameter of 0.5m-1.5m of the furnace roof gas delivery line.
In some embodiments of the utility model, a diameter of 1m-1.3m of the tedge.
In some embodiments of the utility model, the nitrogen sparge tube is the storing at a distance from the sealing valve
The 1/6-1/2 of tank height.
In some embodiments of the utility model, the level-sensing device is the storing at a distance from the storage tank bottom end
The 1/8-3/8 of tank height.
In some embodiments of the utility model, the atomization temperature-reduction device is at a distance from the shaft furnace top
0.3m-0.7m。
In some embodiments of the utility model, the nozzle sprayer has 20-40.
The top gas of the utility model is discharged from top, and shaft furnace charge level can be improved to 0.5m or more, and charge level increases
Improve the dischargeable capacity 5%-10% of shaft furnace.Persistently there is material in the utility model in storage tank, and is conveyed into through tremie pipe perpendicular
Stove, it can be achieved that shaft furnace charging serialization, and can ensure in shaft furnace that charge level is stablized in sustained height, without increasing monitoring material position
Equipment.
The utility model top gas is discharged by the symmetrical tedge of furnace roof so that shaft furnace top gas fluid distrbution is equal
It is even, be conducive to abundant heat exchange and chemical reaction of the top furnace charge with also Primordial Qi, product sponge iron degree of metalization is stablized in 92%-
Between 93%, spongy iron reducing gas consumption per ton reduces about 5%.
Further, since the utility model can be by top gas dustiness by about 6g/Nm3It is down to about 4g/Nm3, temperature by
400 DEG C are down to 200 DEG C or so so that subsequent wash tower water consumption reduces about 30%, and water scrubber design scale also accordingly reduces, and subtracts
Equipment investment and operating cost are lacked.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly will be from following description
In become apparent, or recognized by the practice of the utility model.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of shaft furnace furnace roof in the utility model embodiment.
Specific implementation mode
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when the embodiment of the utility model and its various aspects.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than limitations of the present invention.
As shown in Figure 1, shaft furnace top provided by the utility model is equipped with top charging equipment, top is equipped with top gas
Device for transferring.
Wherein, top charging equipment includes hopper 1, storage tank 2 and tremie pipe 3, storage tank 2 respectively with hopper 1 and
Tremie pipe 3 is connected.The top of storage tank 2 is equipped with sealing valve 21, and the top of storage tank 2 is equipped with nitrogen sparge tube 22, storing
The lower part of tank 2 is equipped with level-sensing device 23.Tremie pipe 3 has multiple, is evenly provided in the same horizontal position of furnace wall in shaft furnace 7.
Material-loosing apparatus 31 is installed, the bottom end of tremie pipe 3 is straight down on tremie pipe 3.
Sealing valve 21 is for preventing shaft furnace stock gas excessive.In the utility model preferred embodiment, nitrogen purging
Pipe 22 is the 1/6-1/2 of storage tank height at a distance from sealing valve 21, more preferably 1/3.When furnace charge deficiency in storage tank 2,
Nitrogen purging is first carried out, after the coal gas in storage tank 2 is purged totally, then sealing valve 21 is opened and carries out loading operation, by material feeding
Furnace charge in bucket 1 is quickly adding into storage tank 2.In the utility model preferred embodiment, level-sensing device 23 and 2 bottom of storage tank
The distance at end be 2 height of storage tank 1/8-3/8, more preferably 1/4.When furnace charge is less than the position of level-sensing device 23, level-sensing device
23 alarms ensure there is material always in storage tank 2 to feed.
So that burden distribution is uniform in shaft furnace, does not occur big angle of rest (repose), preferably multiple storage tanks 2 and tremie pipe 3 are arranged
It is circumferentially symmetrical.Tremie pipe 3 includes the vertical tube and inclined tube being connected, to ensure that charging movement is smooth, inclined tube and horizontal direction
Angle be preferably 55 ° -70 °.Further, the horizontal distance between the bottom end of tremie pipe 3 and the center of shaft furnace, furnace wall 7 is excellent
The bottom end of phase selection etc., tremie pipe 3 is preferably 1m-1.5m at a distance from shaft furnace top.The diameter of tremie pipe 3 is preferably 150mm-
250mm, more preferably 200mm.When 3 blanking of tremie pipe is unsmooth, material-loosing apparatus 31 can be started, furnace charge is disclosed to stove.
In the utility model preferred embodiment, tremie pipe 3 is four or more, it is ensured that furnace charge is in shaft furnace furnace body
Interior (furnace charge area 8) is distributed evenly.In the utility model preferred embodiment, multiple tremie pipes 3 can share a storage
Batch can 2 can reduce the quantity of storage tank 2, reduce equipment occupation space.
Single conduit diameter of MIDREX reaches 2m or more, and stock gas, the shaft furnace furnace roof 2m or more occupied are drawn from side
Height cannot have furnace charge, and the utility model furnace roof space is few, and shaft furnace charge level can improve 0.5m or more, and charge level raising improves
The dischargeable capacity 5%-10% of shaft furnace.Persistently there is material in the utility model in storage tank, and shaft furnace is conveyed into through tremie pipe, it can be real
The serialization of existing shaft furnace charging, and can ensure that charge level is stablized in sustained height, without monitoring material position equipment in shaft furnace.
Top gas device for transferring includes atomization temperature-reduction device 4, furnace roof gas delivery line 5 and tedge 6.Atomization temperature-reduction device 4
In shaft furnace, atomization temperature-reduction device 4 includes ring stainless steel water pipe 41 and nozzle sprayer 42, and nozzle sprayer 42 is installed
On ring stainless steel water pipe 41.Furnace roof gas delivery line 5 has multiple, is evenly provided on the top of shaft furnace；Furnace roof gas delivery line 5
It is connected with tedge 6.Thermocouple 61 is installed, thermocouple 61 is fed back with atomization temperature-reduction device 4 by temperature detection on tedge 6
Element is connected.
In the utility model preferred embodiment, atomization temperature-reduction device 4 is 0.3m-0.7m at a distance from shaft furnace top,
More preferably 0.5m.The ring stainless steel water pipe 41 of atomization temperature-reduction device 4 connects high-pressure hydraulic pump, is persistently supplied by high-pressure hydraulic pump cold
But water.In the utility model preferred embodiment, nozzle sprayer 42 has 20-40.
Furnace roof gas delivery line 5 is arranged in the surface of shaft furnace furnace roof, and four are symmetrically and evenly distributed preferably in top circumference
Furnace roof gas delivery line 5, and positioned at the centre position at shaft furnace center and furnace wall.In the utility model preferred embodiment, stove
A diameter of 0.5m-1.5m of top gas delivery line 5, more preferably 1m.
The upper end of multiple furnace roof gas delivery lines 5 merges, and is connected with tedge 6.It is preferably real in the utility model
It applies in example, a diameter of 1m-1.3m of tedge 6.
Temperature detection feedback element automatically adjusts atomization water according to the gas temperature of variation, detects and sends out water spray letter
Number so that top gas stable temperature control.
The utility model can be by top gas dustiness by about 6g/Nm3It is down to about 4g/Nm3, temperature be down to 200 DEG C by 400 DEG C
Left and right so that subsequent wash tower water consumption reduce about 30%, water scrubber design scale also accordingly reduces, reduce equipment investment and
Operating cost.
Below with reference to specific embodiment, the utility model is illustrated.Institute's taking technique condition value in following embodiments
It is illustrative, can use numberical range as shown in aforementioned utility model content, for not specifically specified technological parameter,
It can refer to routine techniques progress.Detection method used in following embodiments is the detection method of industry routine.
Embodiment
Reducing gas for shaft furnace admission pressure is 60kPa-80kPa, furnace top pressure 10kPa-20kPa in the present embodiment, and is stored up
In batch can 2 due in tremie pipe 3 stock column resistance, pressure be normal pressure.It is iron ore oxide pellet that furnace charge is required in the present embodiment,
It is rounded, it is desirable that compression strength is more than 2500N/, particle size range 8mm-14mm, and it is broken to ensure that pelletizing generates in blanking process
Block is few, and blanking is smooth.
The top charging of the present embodiment shaft furnace is realized by following process：
First, sealing valve 21 is closed, and when furnace charge is continuously added in shaft furnace in storage tank 2, charge level is displaced downwardly to material
After below 23 test positions of meter of position, 23 signal of level-sensing device feeds back to control computer, and storage tank 2 is reminded to need to feed.Then pass through
The top gas having in storage tank 2 is purged to being discharged through furnace roof gas delivery line 5 in stove, is opened later close by nitrogen sparge tube 22
Valve 21 is sealed, charging equipment is started to work, and storage tank 2 quickly continuously is added in iron ore furnace charge in hopper 1, charging finishes
Afterwards, sealing valve 4 is finally closed.As shaft furnace discharges, shaft furnace top charge level declines, and furnace charge continues through tremie pipe 3 in storage tank 5
It is added in shaft furnace, ensures that charge level is stablized on sustained height in shaft furnace.Process as described above constantly recycles, and is carried out to storage tank 2
Synchronously and intermittently feeding ensures that the continuous charging process of shaft furnace furnace roof can be completed always with the presence of furnace charge in tremie pipe 3.
The shaft furnace top gas temperature of the present embodiment sprays atomized water at 400 DEG C or so, by atomization temperature-reduction device 4 and is dropped
Temperature so that top gas greenhouse cooling is to 200 DEG C or so.Using this method, reduces furnace roof space temperature and be down to 200 by 400 DEG C
DEG C or so, 3 operating temperature of tremie pipe reduces, and is conducive to protect tremie pipe 3, ensure in furnace charge smooth blanking to furnace charge area 8.
Sponge iron degree of metalization made from the present embodiment is 92.4%, compared to other methods, spongy iron reducing gas per ton
Consumption reduces about 5%, by top gas dustiness by about 6g/Nm3It is down to about 4g/Nm3, temperature be down to 200 DEG C or so by 400 DEG C,
So that subsequent wash tower water consumption reduces about 30%, water scrubber design scale also accordingly reduces, and reduces equipment investment and operation
Cost.
From above-described embodiment it is found that using the utility model shaft furnace, sponge iron degree of metalization obtained is high, and production is steady
It is fixed.Persistently there is material in storage tank, and shaft furnace is conveyed into through tremie pipe, realize the serialization of shaft furnace charging, and can ensure to erect
Charge level is stablized in sustained height in stove, without increase monitoring material position equipment.
Obviously, above-described embodiment is only intended to clearly illustrate the utility model example, and not to embodiment party
The restriction of formula.For those of ordinary skill in the art, other differences can also be made on the basis of the above description
The variation or variation of form.There is no necessity and possibility to exhaust all the enbodiments.And thus amplify out aobvious and
Among the variation or variation being clear to are still in the scope of protection of the utility model.
Claims (10)
1. a kind of shaft furnace, which is characterized in that the top of the shaft furnace is equipped with top charging equipment, the top installation of the shaft furnace
There is top gas device for transferring；
The top charging equipment includes hopper, storage tank and tremie pipe, the storage tank respectively with the hopper and institute
Tremie pipe is stated to be connected；The top of the storage tank is equipped with sealing valve, and the top of the storage tank is equipped with nitrogen sparge tube, institute
The lower part for stating storage tank is equipped with level-sensing device；The tremie pipe has multiple, is evenly provided on the same water of the furnace wall in shaft furnace
Prosposition is set；Material-loosing apparatus is installed, the bottom end of the tremie pipe is straight down on the tremie pipe；
The top gas device for transferring includes atomization temperature-reduction device, furnace roof gas delivery line and tedge；The atomization temperature-reduction device
In the shaft furnace, the atomization temperature-reduction device includes ring stainless steel water pipe and nozzle sprayer, the nozzle spraying
Device is mounted on the ring stainless steel water pipe；The furnace roof gas delivery line has multiple, is evenly provided on the top of the shaft furnace
End；The furnace roof gas delivery line is connected with the tedge；Thermocouple is installed on the tedge, the thermocouple with it is described
Atomization temperature-reduction device is connected by temperature detection feedback element.
2. shaft furnace according to claim 1, which is characterized in that the tremie pipe includes connected vertical tube and inclined tube, described
Inclined tube and the angle of horizontal direction are 55 ° -70 °.
3. shaft furnace according to claim 1, which is characterized in that the bottom end of the tremie pipe and the center of the shaft furnace, institute
The horizontal distance stated between furnace wall is equal, and the bottom end of the tremie pipe is 1m-1.5m at a distance from the shaft furnace top.
4. shaft furnace according to claim 1, which is characterized in that a diameter of 150mm-250mm of the tremie pipe.
5. shaft furnace according to claim 1, which is characterized in that a diameter of 0.5m-1.5m of the furnace roof gas delivery line.
6. shaft furnace according to claim 1, which is characterized in that a diameter of 1m-1.3m of the tedge.
7. shaft furnace according to claim 1, which is characterized in that the nitrogen sparge tube is institute at a distance from the sealing valve
State the 1/6-1/2 of storage tank height.
8. shaft furnace according to claim 1, which is characterized in that the level-sensing device is institute at a distance from the storage tank bottom end
State the 1/8-3/8 of storage tank height.
9. shaft furnace according to claim 1, which is characterized in that the atomization temperature-reduction device is at a distance from the shaft furnace top
For 0.3m-0.7m.
10. shaft furnace according to claim 1, which is characterized in that the nozzle sprayer has 20-40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721696801.1U CN207738782U (en) | 2017-12-08 | 2017-12-08 | A kind of shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721696801.1U CN207738782U (en) | 2017-12-08 | 2017-12-08 | A kind of shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207738782U true CN207738782U (en) | 2018-08-17 |
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ID=63117406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721696801.1U Active CN207738782U (en) | 2017-12-08 | 2017-12-08 | A kind of shaft furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207738782U (en) |
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2017
- 2017-12-08 CN CN201721696801.1U patent/CN207738782U/en active Active
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