CN209537536U - A kind of gas-based reduction rotary kiln - Google Patents
A kind of gas-based reduction rotary kiln Download PDFInfo
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- CN209537536U CN209537536U CN201822234530.9U CN201822234530U CN209537536U CN 209537536 U CN209537536 U CN 209537536U CN 201822234530 U CN201822234530 U CN 201822234530U CN 209537536 U CN209537536 U CN 209537536U
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- rotary kiln
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- shovel flitch
- liner
- based reduction
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Abstract
The utility model discloses a kind of gas-based reduction rotary kilns, belong to non-blast furnace ironmaking technology technical field, solve the problems, such as Iron Ore Powder in the prior art can not be come into full contact with reducing atmosphere, the reduction efficiency of Iron Ore Powder it is low.The gas-based reduction rotary kiln of the utility model includes the successively liner of fitting, insulating brick, shell and multiple shovel flitches set on liner inner wall from the inside to the outside；The fixing end of shovel flitch is fixedly connected with liner, and the free end of shovel flitch is equipped with the bending part towards rotary kiln rotation direction；Relative to the radial direction of liner, the free end of shovel flitch is to rotary kiln rotation direction deflection.The gas-based reduction rotary kiln of the utility model can be used for the reduction of Iron Ore Powder.
Description
Technical field
The utility model relates to a kind of non-blast furnace ironmaking technology more particularly to a kind of gas-based reduction rotary kilns.
Background technique
Currently, the gas-based reduction technology of industrialized production mainly has gas-based shaft kiln reduction and the reduction of fluidized bed fine ore.
The typical process of gas-based shaft kiln reduction has Midrex and HLY method, all has been carried out heavy industrialization application.Gas-based shaft kiln reduction
Technique is using oxide pellet as Iron Ore Powder, it is therefore desirable to is granulated and be roasted to Iron Ore Powder.In order to improve pelletizing reduction
Degree of metalization, it is desirable that also have higher H in Primordial Qi2Content, so mainly using natural gas as gas source.Since China's natural gas supplies
Deficiency is answered, therefore gas-based shaft kiln reducing process develops slowly in China.The typical process of fluidized bed fine ore reduction is FINEX, should
Technique is the fused reduction iron-smelting technology of Pohang Iron and Steel Corporation and Voestalpine joint development, and the Iron Ore Powder used is fine ore and powder
Coal eliminates the Iron Ore Powders pretreatment process such as coking, sintering and pelletizing of traditional blast furnace ironmaking.The characteristics of FINEX is using more
Grade fluidized bed replaces shaft furnace to carry out prereduction to iron ore, and the stock gas after prereduction removes CO2After recycled, can be with
Reduce primary fuel consumption.The prereduction reactor of FINEX is made of multistage fluidized bed, and fluidized bed is easy to appear adhesion problem,
Operating rate is caused to reduce, only South Korea's Posco is applying the technique at present.
Rotary kiln is a kind of reactor of maturation, is widely used in the industries such as metallurgy, chemical industry, cement, building materials.But it is existing
Some rotary kilns, Iron Ore Powder are unable to fully raise in rotary kiln, and then can not come into full contact with reducing atmosphere, to reduce
The reduction efficiency of Iron Ore Powder.
Summary of the invention
In view of above-mentioned analysis, the utility model is intended to provide a kind of gas-based reduction rotary kiln, solves the prior art
In Iron Ore Powder can not be come into full contact with reducing atmosphere, the problem that the reduction efficiency of Iron Ore Powder is low.
The purpose of this utility model is mainly achieved through the following technical solutions:
The utility model provides a kind of gas-based reduction rotary kiln, including from the inside to the outside successively the liner of fitting, heat preservation
Brick, shell and multiple shovel flitches set on liner inner wall；The fixing end of shovel flitch is fixedly connected with liner, shovel flitch it is hanging
End is equipped with the bending part towards rotary kiln rotation direction；Relative to the radial direction of liner, the free end of shovel flitch is rotated to rotary kiln
Direction deflection.
In a kind of possible design, the junction of shovel flitch and bending part is arc.
In a kind of possible design, the junction of shovel flitch and liner is arc.
In a kind of possible design, arc is the arc of evagination.
In a kind of possible design, shovel flitch is linear or arc along the cross-sectional shape of liner radial direction；Bending part
Cross-sectional shape along liner radial direction is linear or arc.
In a kind of possible design, the angle between shovel flitch and the radial direction of liner is 10 °~45 °.
In a kind of possible design, the distance between fixing end of two neighboring shovel flitch is 0.5~0.8m.
In a kind of possible design, the length of shovel flitch is the 1/8~1/4 of rotary kiln diameter.
In a kind of possible design, the width of shovel flitch is 0.2~0.6m.
In a kind of possible design, bending part length is the 10%~30% of shovel flitch length.
Compared with prior art, the utility model has the beneficial effect that:
A) shovel flitch is equipped in gas-based reduction rotary kiln provided by the utility model, the free end of shovel flitch is equipped with direction
The bending part of rotary kiln rotation direction, bending part can guarantee Iron Ore Powder being increased to certain altitude, so that it is guaranteed that Iron Ore Powder
Recovery time；Meanwhile in rotary kiln rotary course, Iron Ore Powder is raised and is restored repeatedly, thus reach higher reduction rate and
Degree of metalization.
B) in gas-based reduction rotary kiln provided by the utility model, relative to the radial direction of liner, the free end of shovel flitch
To rotary kiln rotation direction deflection, to guarantee that the Iron Ore Powder fallen can be mentioned again by shovel flitch.
Other feature and advantage of the utility model will illustrate in the following description, also, partial from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages can pass through
Structure specifically indicated in the written description, claims, and drawings is achieved and obtained.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not considered as limitations of the present invention, entire
In attached drawing, identical reference symbol indicates identical component.
Fig. 1 is the structural schematic diagram for the gas-based reduction rotary kiln that the utility model embodiment one provides；
Shovel flitch and the structure of bending part are shown in the gas-based reduction rotary kiln that Fig. 2 provides for the utility model embodiment one
It is intended to；
The main view of shovel flitch and bending part in the gas-based reduction rotary kiln that Fig. 3 provides for the utility model embodiment one
Figure.
Appended drawing reference:
1- shell；2- insulating brick；3- liner；4- shovel flitch；5- bending part；D- shovel flitch length；D- bending part length；L-
Shovel flitch width；The angle of α-shovel flitch and liner radial direction.
Specific embodiment
Specifically describe the preferred embodiment of the utility model with reference to the accompanying drawing, wherein attached drawing constitutes the utility model
A part, and be used to illustrate the principles of the present invention together with the embodiments of the present invention.
Embodiment one
A kind of gas-based reduction rotary kiln is present embodiments provided, referring to Fig. 1 to Fig. 3, including successively fitting from the inside to the outside
Liner 3 (for example, heat-resisting steel lining 3), insulating brick 2, shell 1 (for example, steel shell) and multiple shovel material set on 3 inner wall of liner
Plate 4.Wherein, the fixing end of shovel flitch 4 is fixedly connected with liner 3, and the free end of shovel flitch 4 is equipped with towards rotary kiln rotation direction
Bending part 5；Relative to the radial direction of liner 3, the free end of shovel flitch 4 is to rotary kiln rotation direction deflection.
When implementation, Iron Ore Powder is added from rotary kiln, in rotary kiln rotary course, is fixed on the shovel flitch 4 of kiln inner wall
Iron Ore Powder is scooped up, Iron Ore Powder is fallen after being increased to certain altitude, and the Iron Ore Powder fallen and reducing atmosphere are sufficiently basic, is gone back
The reduction of Primordial Qi atmosphere.Since rotary kiln has certain tilt angle, Iron Ore Powder is during scooping up repeatedly, falling, gradually from kiln
Tail moves to kiln hood, to realize the drastic reduction of fine ore.
Compared with prior art, shovel flitch 4 is equipped in gas-based reduction rotary kiln provided in this embodiment, shovel flitch 4
Free end is equipped with the bending part 5 towards rotary kiln rotation direction, and bending part 5 can guarantee Iron Ore Powder being increased to certain altitude,
So that it is guaranteed that the recovery time of Iron Ore Powder；Meanwhile in rotary kiln rotary course, Iron Ore Powder is raised and is restored repeatedly, to reach
To higher reduction rate and degree of metalization.
Meanwhile in above-mentioned gas-based reduction rotary kiln, relative to the radial direction of liner 3, the free end of shovel flitch 4 is to rotary kiln
Rotation direction deflection, to guarantee that the Iron Ore Powder fallen can be mentioned again by shovel flitch 4.
In order to reduce the junction that Iron Ore Powder is deposited on shovel flitch 4 Yu bending part 5, the junction of shovel flitch 4 and bending part 5
Can be arc, the junction of shovel flitch 4 and bending part 5 can not only be avoided to form turning by arc, reduce shovel flitch 4 with
The stress of 5 junction of bending part is concentrated, additionally it is possible to reduce the junction that Iron Ore Powder is deposited on shovel flitch 4 Yu bending part 5.
Similarly, in order to reduce the junction that Iron Ore Powder is deposited on shovel flitch 4 Yu liner 3, the company of shovel flitch 4 and liner 3
Connect place or arc.
In order to promote Iron Ore Powder raising between shovel flitch 4, above-mentioned arc can be the arc of evagination, in rotary kiln
In rotation process, when Iron Ore Powder is fallen on the arc of evagination, the arc of evagination can make Iron Ore Powder also can in junction
It adequately raises, further increases recovery time and the reduction rate of Iron Ore Powder.
For the shape of shovel flitch 4, specifically, shovel flitch 4 can be linear along the cross-sectional shape of liner radial direction
Or arc, likewise, bending part 5 may be linear or arc along the cross-sectional shape of liner radial direction.
In order to improve the reduction rate of Iron Ore Powder, above-mentioned shovel flitch 4 folder radial with liner 3 on the basis of guaranteeing treating capacity
Angle α can control at 10 °~45 °, for example, 23 °.This is because angle is smaller, the height that Iron Ore Powder raises is lower, is unfavorable for
The reduction of Iron Ore Powder, but treating capacity can be improved；Angle is bigger, and the height that Iron Ore Powder scoops up is higher, is conducive to Iron Ore Powder
Reduction, but treating capacity reduces, and therefore, the angle between shovel flitch 4 and the radial direction of liner 3 can control at 10 °~45 °, energy
Enough reduction rates that Iron Ore Powder is improved on the basis of guaranteeing treating capacity.
In order to improve the reduction rate of Iron Ore Powder on the basis of guaranteeing treating capacity, the fixing end of two neighboring shovel flitch 4 it
Between distance be 0.5~0.8m, illustratively, the rotary kiln for being 2~3m for diameter, the quantity of shovel flitch 4 can control
18~30, rotary kiln diameter is bigger, and the arrangement of shovel flitch 4 is more, and rotary kiln is smaller, and the arrangement of shovel flitch 4 is fewer.This is because
The distance between the fixing end of two neighboring shovel flitch 4 is too small, although can be improved, shovel doses is excessive, and Iron Ore Powder is moved from kiln tail
Rate to kiln hood is too small, will affect treating capacity；The distance between the fixing end of two neighboring shovel flitch 4 is excessive, and shovel is caused to be expected
It measures very few, is unfavorable for the reduction of Iron Ore Powder, influences the reduction rate of Iron Ore Powder.
In order to avoid the Iron Ore Powder of poor fluidity is trapped between two neighboring shovel flitch 4, shovel flitch length D is rotary kiln
The 1/8~1/4 of diameter, it should be noted that for the Iron Ore Powder of good fluidity, shovel flitch length D can have more in this way
Conducive to raising for Iron Ore Powder, for the Iron Ore Powder of poor fluidity, shovel flitch length D is a little bit smaller, in this way can be to avoid poor fluidity
Iron Ore Powder be trapped between two neighboring shovel flitch 4, by the limited proportion of shovel flitch length D and rotary kiln diameter in above-mentioned model
In enclosing, the reduction of Iron Ore Powder can not only be promoted, additionally it is possible to the Iron Ore Powder of poor fluidity be avoided to be trapped in two neighboring shovel flitch 4
Between.
In order to balance the reduction of Iron Ore Powder and the movement rate of Iron Ore Powder, shovel flitch width L can control 0.2~
0.6m is conducive to Iron Ore Powder in this way and moves to kiln hood direction, guarantees treating capacity.It should be noted that shovel flitch width L can root
Determine that rotary kiln length is bigger, and shovel flitch width L is bigger, and rotary kiln length is smaller, and shovel flitch width L is got over according to rotary kiln length
It is small.
It can be the 10%~30% of shovel flitch length D, it is notable that shovel flitch 4 for bending part length d
It needs to control in a certain range with the total length of bending part 5, therefore, shovel flitch length D big bending part length d is smaller,
Shovel flitch length D small bending part length d is more greatly.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.
Claims (10)
1. a kind of gas-based reduction rotary kiln, which is characterized in that including the successively liner of fitting, insulating brick, shell from the inside to the outside
And multiple shovel flitches set on liner inner wall；
The fixing end of the shovel flitch is fixedly connected with liner, and the free end of the shovel flitch is equipped with towards rotary kiln rotation direction
Bending part；
Relative to the radial direction of liner, the free end of the shovel flitch is to rotary kiln rotation direction deflection.
2. gas-based reduction rotary kiln according to claim 1, which is characterized in that the connection of the shovel flitch and bending part
Place is arc.
3. gas-based reduction rotary kiln according to claim 2, which is characterized in that the junction of the shovel flitch and liner
For arc.
4. gas-based reduction rotary kiln according to claim 2 or 3, which is characterized in that the arc is the arc of evagination.
5. gas-based reduction rotary kiln according to claim 1, which is characterized in that cross of the shovel flitch along liner radial direction
Cross sectional shape is linear or arc；
The bending part is linear or arc along the cross-sectional shape of liner radial direction.
6. gas-based reduction rotary kiln according to claim 1, which is characterized in that the shovel flitch and the radial direction of liner
Between angle be 10 °~45 °.
7. gas-based reduction rotary kiln according to claim 1, which is characterized in that the fixing end of two neighboring shovel flitch it
Between distance be 0.5~0.8m.
8. gas-based reduction rotary kiln according to claim 1, which is characterized in that the length of the shovel flitch is rotary kiln
The 1/8~1/4 of diameter.
9. gas-based reduction rotary kiln according to claim 1, which is characterized in that the width of the shovel flitch be 0.2~
0.6m。
10. according to claim 1 to 3,5 to 9 described in any item gas-based reduction rotary kilns, which is characterized in that the bending
Minister's degree is the 10%~30% of shovel flitch length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822234530.9U CN209537536U (en) | 2018-12-28 | 2018-12-28 | A kind of gas-based reduction rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822234530.9U CN209537536U (en) | 2018-12-28 | 2018-12-28 | A kind of gas-based reduction rotary kiln |
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| CN209537536U true CN209537536U (en) | 2019-10-25 |
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| CN201822234530.9U Active CN209537536U (en) | 2018-12-28 | 2018-12-28 | A kind of gas-based reduction rotary kiln |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116769994A (en) * | 2023-08-25 | 2023-09-19 | 山西冶金工程技术有限公司 | Material loosening device of gas-based reduction shaft furnace |
-
2018
- 2018-12-28 CN CN201822234530.9U patent/CN209537536U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116769994A (en) * | 2023-08-25 | 2023-09-19 | 山西冶金工程技术有限公司 | Material loosening device of gas-based reduction shaft furnace |
| CN116769994B (en) * | 2023-08-25 | 2023-11-17 | 山西冶金工程技术有限公司 | Material loosening device of gas-based reduction shaft furnace |
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