CN206385189U - A kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron - Google Patents
A kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron Download PDFInfo
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- CN206385189U CN206385189U CN201621377205.2U CN201621377205U CN206385189U CN 206385189 U CN206385189 U CN 206385189U CN 201621377205 U CN201621377205 U CN 201621377205U CN 206385189 U CN206385189 U CN 206385189U
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- gas
- shaft kiln
- sponge iron
- based shaft
- storehouse
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Abstract
The utility model discloses the gas-based shaft kiln and its method that a kind of cold bound pellet prepares sponge iron.The gas-based shaft kiln generally includes feeding bin, multiple middle batch cans and reduction storehouse.Connected, connected between middle batch can and reduction storehouse by reducing storehouse feeding mouth by middle batch can feeding mouth between feeding bin and middle batch can.Meanwhile, the invention also discloses the method that sponge iron is prepared using the gas-based shaft kiln.Gas-based shaft kiln of the present utility model and its method concentrate on the drying, preheating and reduction process of cold bound pellet to be completed in gas-based shaft kiln feeding bin, middle batch can and reduction storehouse, it enormously simplify technological process, save equipment needed for acid pellet or agglomerates preparation process, reduce the pressure in vertical range and the frictional force from pelletizing around that bottom cold bound pellet is born, reduce pelletizing pulverization rate, comprehensive energy consumption is also a saving, the production efficiency of sponge iron is improved.
Description
Technical field
The utility model is related to metallurgical technology field, specifically, and the utility model is related to prepares sea by cold bound pellet
The gas-based shaft kiln of continuous iron.
Background technology
Gas-based shaft kiln prepares sponge iron and uses acid pellet or agglomerates for raw material, generally requires to pass through cold bound pellet
Crossing after drying, be calcined and cooling down to enter in gas-based shaft kiln.Green-ball drying process is carried out in drying grate, and roasting is often being returned
Carried out in rotary kiln, be cooled on central cooler and carry out.Gas-based shaft kiln prepares raw material that sponge iron used under room temperature or low temperature
Acid pellet, this is related to the drying, roasting and cooling procedure of cold bound pellet, and long flow path, equipment is complicated, causes substantial amounts of
Energy dissipation.
In recent years, there is patent report to be directly entered gas-based shaft kiln production sponge iron using cold bound pellet, can greatly contract
Short processes flow, reduces energy dissipation.However, because there is low intensity, easily crushing and influenceing gas base to erect in cold bound pellet itself
The deficiency of stove bed permeability, and the commercial practice that sponge iron is produced in gas-based shaft kiln using cold bound pellet rarely has report
Road, therefore prepare sponge iron using cold bound pellet in gas-based shaft kiln and still need more practice and exploring.
The compression strength that different temperatures band and the cold bound pellet of position can bear in gas-based shaft kiln is different.It is existing
Gas-based shaft kiln is that pelletizing bears pressure and the frictional force brought from body and surrounding pelletizing in vertical heater, stove, and shaft furnace is higher,
The pressure in vertical range and frictional force that pelletizing is born in stove are bigger.
Utility model content
The problem of sponge iron is present is prepared for above-mentioned gas-based shaft kiln, cold bound pellet is used the utility model proposes one kind
Prepare the gas-based shaft kiln and its method of sponge iron.Technique stream had both been enormously simplify using gas-based shaft kiln of the present utility model and method
Journey, while having saved comprehensive energy consumption, improves the production efficiency of sponge iron.
According to one side of the present utility model, the gas base that a kind of cold bound pellet of the utility model offer prepares sponge iron is erected
Stove, the gas-based shaft kiln includes：
Feeding bin, it is located at the topmost of gas-based shaft kiln and with cavity, and feeding bin, which includes being located at the top of it, freezes off knot
Pelletizing entrance and top gas outlet, the wherein bottom wall of feeding bin are convex taper, the bottom wall edge of feeding bin and side wall it
Between be provided with multiple middle batch can feeding mouths；
Multiple hollow middle batch cans, each middle batch can is connected by middle batch can feeding mouth with feeding bin, middle material
The bottom wall of tank is inclined-plane, and inclined-plane edge is gradually reduced towards the direction of the vertical center line of gas-based shaft kiln；
Storehouse is reduced, is connected with the side wall of each middle batch can, reduction storehouse has cavity and roof is recessed taper, also
Batch can and reduction storehouse in the middle of multiple reduction storehouses feeding mouth, reduction storehouse feeding mouth connection are provided between the roof in former storehouse and its side wall,
Reducing storehouse also includes also Primordial Qi entrance；And
Sponge iron is exported, and it is located at reduction orlop end.
According to one embodiment of the present utility model, wherein top gas outlet is positioned at the top of feeding bin side wall；Also Primordial Qi
Entrance is located at the bottom of the side wall in reduction storehouse.
According to one embodiment of the present utility model, the quantity of middle batch can is not less than 2.
According to one embodiment of the present utility model, the corner angle of the taper that the bottom wall of feeding bin is formed for 120 °~
170°。
According to one embodiment of the present utility model, the inclined-plane of bottom wall formation and the angle of horizontal plane of middle batch can are 5 °
~30 °, preferably 15 °~25 °.
According to one embodiment of the present utility model, the corner angle ratio of the taper of reduction silo roof wall formation is freely fallen into also
The maximum angle of taper of the pelletizing stockpile formed in the middle part of former storehouse is small 0 °~and 10 °.
According to another aspect of the present utility model, the utility model also provides a kind of use gas-based shaft kiln and prepares sponge iron
Method, this method comprises the following steps：
1) prepare cold bound pellet and cold bound pellet is added to the feeding bin of gas-based shaft kiln by cold bound pellet entrance
It is interior；
2) in feeding bin using first gas from bottom to top to step 1) in the cold bound pellet that adds be dried；
3) by step 2) in dried cold bound pellet be transported to by middle batch can feeding mouth in middle batch can, utilize
Second gas from bottom to top is preheated in middle batch can to cold bound pellet, the cold bound pellet after being preheated and
One gas；
4) by step 3) in preheat after cold bound pellet by reduction storehouse feeding mouth be transported to reduction storehouse in, freeze off balling
Group contacts with the also Primordial Qi being passed through through also Primordial Qi entrance and concurrently gives birth to reduction reaction, generation sponge iron and second gas；
5) step 4 is made) sponge iron outlet discharge of the middle sponge iron generated through reduction orlop end.
According to one embodiment of the present utility model, step 1) in prepared cold bound pellet biodiversity content not
More than 10%, and the mode of cold bound pellet is prepared including disk pelletizing, to one kind in roll-in ball or compacting balling-up mode
Or it is several.
According to one embodiment of the present utility model, step 3) in second gas temperature be 400 DEG C~700 DEG C.
According to one embodiment of the present utility model, step 4) in also Primordial Qi temperature be 850 DEG C~950 DEG C.
According to one embodiment of the present utility model, top gas temperature is 200 DEG C~400 DEG C.
According to one embodiment of the present utility model, also Primordial Qi includes H2+ CO and H2+ CO percent by volume is not small
In 80%.
According to one embodiment of the present utility model, sponge iron temperature is 400 DEG C~700 DEG C after reduction.
Cold bound pellet of the present utility model prepare the gas-based shaft kiln and its method of sponge iron by the drying of cold bound pellet,
Preheating and reduction process are concentrated on to be completed in gas-based shaft kiln feeding bin, middle batch can and reduction storehouse, enormously simplify technological process,
Save equipment needed for acid pellet or agglomerates preparation process.And feeding bin, middle batch can and reduction three, storehouse device
It is independent toward each other, the pressure in vertical range that reduces that bottom cold bound pellet born and from pelletizing around
Frictional force, reduces pelletizing pulverization rate, also a saving comprehensive energy consumption, improves the production efficiency of sponge iron.
Brief description of the drawings
Fig. 1 is the schematic diagram for the gas-based shaft kiln that cold bound pellet of the present utility model prepares sponge iron；And
Fig. 2 is the flow signal for the method that use gas-based shaft kiln of the present utility model is prepared sponge iron by cold bound pellet
Figure.
Embodiment
It should be appreciated that shown embodiment of the present utility model is merely illustrative in the exemplary embodiment.Although
Only a small number of embodiments are described in detail in the utility model, but those skilled in the art are readily appreciated that and taken off in not essence
In the case of teaching from the utility model theme, a variety of modifications are feasible.Correspondingly, all such modifications should all be wrapped
Include in the range of the utility model.In the case where not departing from purport of the present utility model, following exemplary can be implemented
Design, operating condition and parameter of example etc. make others and replace, change, change and delete.
The gas-based shaft kiln of sponge iron is prepared referring to Fig. 1 cold bound pellets for describing the utility model embodiment.The gas
Base shaft furnace generally includes feeding bin 100, multiple hollow middle batch cans 200 and reduction storehouse 300.
Feeding bin 100 is located at the topmost of gas-based shaft kiln and with cavity, and feeding bin 100 includes being located at freezing off at the top of it
Balling group's entrance 110 and top gas outlet 130, the wherein bottom wall of feeding bin 100 are convex taper, the bottom of feeding bin 100
Multiple middle batch can feeding mouths 120 are provided between wall edge and its side wall.The drift angle for the taper that the bottom wall of feeding bin 100 is formed
Angle is 120 °~170 °, thereby assists in the extrorse middle batch can of the cold bound pellet fallen on the bottom wall of feeding bin 100 and enters
Material mouth 120 is moved.
Multiple hollow in the vertical directions of middle batch can 200 are totally located at the middle part of gas-based shaft kiln.Batch can in the middle of each
Logical 200 excessively in the middle of batch can feeding mouths 120 connected with feeding bin 100, the bottom wall of middle batch can 200 is inclined-plane, and the inclined-plane is along direction
The direction of the vertical center line of gas-based shaft kiln is gradually reduced, and the angle of the inclined-plane and horizontal plane is 5 °~30 °, preferably 15 °~
25 °, thereby assist in the cold bound pellet for falling on the middle bottom wall of batch can 200 and moved towards storehouse feeding mouth (being detailed below) is reduced
It is dynamic.
The roof for reducing storehouse 300 is connected with the side wall that each middle batch can is located inside gas-based shaft kiln, and reduction storehouse 300 has
Cavity and roof are recessed taper, and the corner angle of the taper is than freely falling into the pelletizing that the middle part of reduction storehouse 300 is formed
The maximum angle of taper of stockpile is small 0 °~10 °, thus the gas preferably in guiding reduction storehouse 300 enter middle batch can 200.
Multiple reduction storehouses feeding mouth 310 is provided between the roof and its side wall that reduce storehouse 300, during each reduction storehouse feeding mouth 310 is connected
Between batch can 200 and reduction storehouse 300, reduction storehouse 300 also includes the also Primordial Qi entrance 320 and positioned at reduction positioned at its lower sidewall
The sponge iron outlet 330 of the bottom of storehouse 300.
According to specific embodiment of the utility model, the quantity of middle batch can 200 is not less than 2.
When preparing sponge iron using gas-based shaft kiln of the present utility model, cold bound pellet is entered by cold bound pellet first
Mouth 110 is added in feeding bin 100.Because the feeding bin 100 of gas-based shaft kiln is connected with multiple middle batch cans 200 below,
Therefore, the higher gas of temperature can be travelled up in feeding bin 100 in middle batch can 200.Gas from bottom to top and addition
Contacted to the cold bound pellet in feeding bin 100 and it is dried.Because the bottom wall of feeding bin 100 is convex cone
Shape, therefore, the cold bound pellet fallen on bottom wall can be moved to feeding bin bottom wall edge, and then by middle batch can feeding mouth
120 enter middle batch can 200.In middle batch can 200, the gas for coming autoreduction storehouse 300 connects with the cold bound pellet fallen
Touch and it is preheated.Inclined plane shape bottom wall of the cold bound pellet along middle batch can 200 after preheating is snapped down to reduction storehouse pan feeding
Mouth 310, and enter reduction storehouse 300 through reducing storehouse feeding mouth 310.In reduction storehouse 300, cold bound pellet and height after preheating
Reduction reaction is concurrently given birth in the also Primordial Qi contact of temperature, obtains sponge iron, and sponge iron is finally exported through reducing the sponge iron of the bottom of storehouse 300
330 discharges.
Fig. 2 shows that the flow for the method that sponge iron is prepared by cold bound pellet using gas-based shaft kiln of the present utility model is shown
It is intended to.Illustrate to use the method for the present utility model for preparing sponge iron with reference to Fig. 1 and reference picture 2.
In the step s 100, prepare cold bound pellet and cold bound pellet is added to gas by cold bound pellet entrance 110
In the feeding bin 100 of base shaft furnace, the moisture of prepared cold bound pellet is not more than 10%, and can be made using disk
Ball, prepared by cold bound pellet to the one or more in roll-in ball or compacting balling-up mode.
In step s 200, what is added during first gas from bottom to top is utilized in feeding bin 100 to step S100 is cold
Agglomerated pellet is dried, and dried top gas is discharged through top gas outlet 130, and top gas temperature is about 200 DEG C~400
℃。
In step S300, dried cold bound pellet in step S200 is transported to through middle batch can feeding mouth 120
In middle batch can 200, cold bound pellet is preheated in middle batch can 200 using second gas from bottom to top, obtained
Cold bound pellet and first gas after preheating, the temperature of the second gas in middle batch can 200 is about 400 DEG C~700 DEG C.
In step S400, the cold bound pellet after being preheated in step S300 is transported to also through reducing storehouse feeding mouth 310
In former storehouse 300, with the also Primordial Qi being passed through through also Primordial Qi entrance 320 reduction reaction, generation sponge iron and the occur for cold bound pellet
Two gases.Wherein, H also in Primordial Qi2It is not less than 80% with the percentage of CO cumulative volume, its temperature is about 850 DEG C~950 DEG C.
Sponge iron temperature is 400 DEG C~700 DEG C after reduction.
In step S500, the sponge iron obtained in step S400 is set to export 330 rows through reducing the sponge iron of the bottom of storehouse 300
Go out.
Illustrate that cold bound pellet of the present utility model prepares its side of sponge iron in conjunction with specific embodiments further below
Method.
Embodiment one
The cold bound pellet of moisture 10% is added in gas-based shaft kiln feeding bin 100 by cold bound pellet entrance 110.
The cold bound pellet of addition is dried using first gas from bottom to top in feeding bin 100, dried top gas
Discharged through top gas outlet 130, top gas temperature is about 200 DEG C.Dried cold bound pellet is through middle batch can feeding mouth 120
It is transported in middle batch can 200, cold bound pellet is carried out in advance in middle batch can 200 using second gas from bottom to top
Heat, the temperature of the second gas is about 400 DEG C, cold bound pellet and first gas after being preheated.By freezing off after preheating
Balling group is transported in reduction storehouse 300 through reducing storehouse feeding mouth 310, and cold bound pellet goes back Primordial Qi entrance 320 is passed through 850 with warp
DEG C also Primordial Qi occur reduction reaction, generation sponge iron and second gas.Wherein, also H is included in Primordial Qi2With CO and H2And CO
Cumulative volume percentage be 80%, after reduction sponge iron temperature be 400 DEG C.Finally make obtained sponge iron through reducing storehouse 300
Discharge the sponge iron outlet 330 of bottom.
The degree of metalization for the sponge iron that above-mentioned technical proposal of the present utility model obtains is used for 81.7%, and traditional handicraft
The degree of metalization of obtained sponge iron is 82.4%.
Embodiment two
The cold bound pellet of moisture 9% is added in gas-based shaft kiln feeding bin 100 by cold bound pellet entrance 110.
The cold bound pellet of addition is dried using first gas from bottom to top in feeding bin 100, dried top gas
Discharged through top gas outlet 130, top gas temperature is about 300 DEG C.Dried cold bound pellet is through middle batch can feeding mouth 120
It is transported in middle batch can 200, cold bound pellet is carried out in advance in middle batch can 200 using second gas from bottom to top
Heat, the temperature of the second gas is about 600 DEG C, cold bound pellet and first gas after being preheated.By freezing off after preheating
Balling group is transported in reduction storehouse 300 through reducing storehouse feeding mouth 310, and cold bound pellet goes back Primordial Qi entrance 320 is passed through 900 with warp
DEG C also Primordial Qi occur reduction reaction, generation sponge iron and second gas.Wherein, H also in Primordial Qi2With the percentage of CO cumulative volume
Than for 85%, sponge iron temperature is 600 DEG C after reduction.Obtained sponge iron is finally set to go out through reducing the sponge iron of the bottom of storehouse 300
Mouth 330 is discharged.
The degree of metalization for the sponge iron that above-mentioned technical proposal of the present utility model obtains is used for 83.2%, and traditional handicraft
The degree of metalization of obtained sponge iron is 84.1%.
Embodiment three
The cold bound pellet of moisture 8% is added in gas-based shaft kiln feeding bin 100 by cold bound pellet entrance 110.
The cold bound pellet of addition is dried using first gas from bottom to top in feeding bin 100, dried top gas
Discharged through top gas outlet 130, top gas temperature is about 400 DEG C.Dried cold bound pellet is through middle batch can feeding mouth 120
It is transported in middle batch can 200, cold bound pellet is carried out in advance in middle batch can 200 using second gas from bottom to top
Heat, the temperature of the second gas is about 700 DEG C, cold bound pellet and first gas after being preheated.By freezing off after preheating
Balling group is transported in reduction storehouse 300 through reducing storehouse feeding mouth 310, and cold bound pellet goes back Primordial Qi entrance 320 is passed through 950 with warp
DEG C also Primordial Qi occur reduction reaction, generation sponge iron and second gas.Wherein, H in Primordial Qi is once gone back2With CO cumulative volume
Percentage is 88%, and the temperature of the sponge iron after reduction is about 700 DEG C.Finally make obtained sponge iron through reducing the bottom of storehouse 300
Sponge iron outlet 330 discharge.
The degree of metalization for the sponge iron that above-mentioned technical proposal of the present utility model obtains is used for 85.9%, and traditional handicraft
The degree of metalization of obtained sponge iron is 87.3%.
Preferred embodiment of the present utility model is the foregoing is only, not for limiting practical range of the present utility model；
If not departing from spirit and scope of the present utility model, the utility model is modified or equivalent substitution, all should covered
Among the utility model scope of the claims.
Claims (6)
1. a kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron, it is characterised in that the gas-based shaft kiln includes：
Feeding bin, it is located at the topmost of gas-based shaft kiln and with cavity, and feeding bin includes being located at the cold bound pellet at the top of it
Entrance and top gas outlet, the wherein bottom wall of feeding bin is convex taper, is set between the bottom wall edge and side wall of feeding bin
There are multiple middle batch can feeding mouths；
Multiple hollow middle batch cans, each middle batch can is connected by middle batch can feeding mouth with feeding bin, middle batch can
Bottom wall is inclined-plane, and the inclined-plane edge is gradually reduced towards the direction of the vertical center line of gas-based shaft kiln；
Storehouse is reduced, is connected with the side wall of each middle batch can, reduction storehouse has cavity and roof is recessed taper, reduces storehouse
Roof and its side wall between be provided with multiple reduction storehouses feeding mouth, reduction storehouse feeding mouth connection in the middle of batch can and reduction storehouse, reduction
Storehouse also includes also Primordial Qi entrance；And
Sponge iron is exported, and it is located at reduction orlop end.
2. the gas-based shaft kiln according to claim 1 for preparing sponge iron, it is characterised in that wherein：
The top gas outlet is positioned at the top of feeding bin side wall；
The also Primordial Qi entrance is located at the bottom of the side wall in reduction storehouse.
3. the gas-based shaft kiln according to claim 1 for preparing sponge iron, it is characterised in that the quantity of the middle batch can is not
Less than 2.
4. the gas-based shaft kiln according to claim 1 for preparing sponge iron, it is characterised in that the bottom wall institute shape of the feeding bin
Into taper corner angle be 120 °~170 °.
5. the gas-based shaft kiln according to claim 1 for preparing sponge iron, it is characterised in that the bottom wall shape of the middle batch can
Into inclined-plane and the angle of horizontal plane be 5 °~30 °.
6. the gas-based shaft kiln according to claim 1 for preparing sponge iron, it is characterised in that the reduction silo roof wall formation
The maximum angle of taper of pelletizing stockpile that the corner angle of taper is formed than freely falling into the middle part of reduction storehouse is small 0 °~and 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621377205.2U CN206385189U (en) | 2016-12-15 | 2016-12-15 | A kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621377205.2U CN206385189U (en) | 2016-12-15 | 2016-12-15 | A kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron |
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| Publication Number | Publication Date |
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| CN206385189U true CN206385189U (en) | 2017-08-08 |
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ID=59488040
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621377205.2U Expired - Fee Related CN206385189U (en) | 2016-12-15 | 2016-12-15 | A kind of cold bound pellet prepares the gas-based shaft kiln of sponge iron |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676219A (en) * | 2016-12-15 | 2017-05-17 | 江苏省冶金设计院有限公司 | Gas-based shaft kiln for preparing sponge iron through cold-bonded pellets and method of gas-based shaft kiln |
-
2016
- 2016-12-15 CN CN201621377205.2U patent/CN206385189U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676219A (en) * | 2016-12-15 | 2017-05-17 | 江苏省冶金设计院有限公司 | Gas-based shaft kiln for preparing sponge iron through cold-bonded pellets and method of gas-based shaft kiln |
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