CN106399621B - Blender for mechanical agitation desulfuration - Google Patents
Blender for mechanical agitation desulfuration Download PDFInfo
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- CN106399621B CN106399621B CN201610404158.4A CN201610404158A CN106399621B CN 106399621 B CN106399621 B CN 106399621B CN 201610404158 A CN201610404158 A CN 201610404158A CN 106399621 B CN106399621 B CN 106399621B
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- Prior art keywords
- stirring blade
- blender
- stabilizer
- metal
- agitating shaft
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a kind of blenders for mechanical agitation desulfuration, it includes agitating shaft and the connecting flange that is arranged in above agitating shaft, agitating shaft lower end is disposed with stirring blade and stabilizer, the internal layer of agitating shaft, stirring blade and stabilizer is hollow metal tube core, hollow metal tube core top is connect with connecting flange, metal plug is provided on hollow metal tube core lower end inner wall, hollow metal die internal is inserted with forced air cooled tube, forced air cooled tube top is connect with connecting flange, and forced air cooled tube lower end nozzle and metal plug form air outlet.Present invention reduces stirrer bottom center molten iron rotating vortex intensity below, blender breakage process is delayed, improves the comprehensive service performance of blender, the short deficiency of large stirrer service life can be effectively relieved, reach and extend blender service life, reduce the comprehensive purposes such as blender consumes, the large-scale molten iron KR stirring desulphurization Technological Economy of improvement is sold directly to households.
Description
Technical field
The present invention relates to blenders, in particular to the stirring for being used for mechanical agitation desulfuration outside molten iron furnace before a kind of pneumatic steelmaking
Device.
Background technique
KR (Kambara Reactor) stirring desulphurization method is that nippon began one's study in 1963, nineteen sixty-five application
In a kind of industrial External Desulfurization Technique From Melten Iron, this sulfur method is with the cruciate lobe knot of an outer lining refractories
Structure blender, which immerses, carries out rotational agitation molten iron in hot-metal bottle, so that molten iron is generated vortex, the desulfurizing agent by weighing is by dispenser
It is added to molten iron surface, and is involved in molten iron by vortex, mixes, react with high temperature liquid iron, achieve the purpose that desulfurization.The desulfurization side
Method has the features such as desulfuration efficiency is high, and sorbent consumption is few, and the activity duration is short, and metal depletion is low and refractory consumption rate is low.
Blender is that the important component and desulfurizing agent in KR desulfurizer are stirred the unique dynamic of dispersion in molten iron
Power source, thus the damage process of blender and service life will directly influence be stirred characteristic, desulfurizing iron efficiency with
The improvement of desulfurization technical-economic index.With continuing to optimize for KR desulfurization agitator structure, blender technology of preparing, making material
With the continuous development of preparation process, on-line maintenance technology, blender service life extends at double, such as: document " Ouyang De just,
In Liu Shoutang, Lee's tool, the polytechnic research of KR desulfurization blender long-life and application, steel-making, 2009, No6 " report, 100 tons
Hot-metal bottle KR desulfurization blender service life by early stage it is average less than 100 furnaces/be increased to, 730 furnaces/.However, practical raw
In production, with the enlargement of molten iron KR agitating device, blender service life sharply declines, and damaged condition is also by blender leaf
Piece crackle, which is peeled off, to be developed into stirrer bottom abrasion with abrasion and peels off, especially stirring blade bottom outside, is damaged especially tight
Weight, finally terminates use because of stirring blade metal core bottom or agitating shaft metal core base ablation.It stirs and fills for molten iron KR
The problem of enlarged bring blender service life sharply declines is set, domestic and foreign scholars have carried out some beneficial research works
Make, such as: " improvement (translating selected passages) of Desulphurization of Pig Iron, Taiyuan Iron and Steel Co. translation, 1994, (1), 20-25. " reports SUMITOMO CHEMICAL gold to document
The island Shu Lu iron takes the lead in having studied the nineties in last century agitator paddle diameter and stirring leaf shape to mechanical agitation desulfuration
The influence of fluid dynamics condition proposes the expanding dynamics corrective measure with the outer convex mixing surface of leaf of agitator paddle,
Wherein, special-shaped paddle does not promote and apply due to shape remains difficult in actual use, and agitator paddle is expanding at home and abroad
Some iron and steel enterprises are applied, but because molten iron level lifting height, stirring intensity and vibration are big, affect the molten iron of hot-metal bottle
Efficient loading amount exacerbates the erosive wear of mixing arm, and crisis is kept the safety in production due to mixing plant vibration is big.Application number
A kind of desulfurization agitator head for hot metal is disclosed for 200810048900.8 Chinese invention patent, is for a kind of stirring blade corner
The Novel mixer of arc-shaped transitional surface is designed by stirring blade corner arc transition face structure, strengthens the iron-resistant of stirring blade
Water erosive wear ability；Application No. is a kind of 200910060770.4 Chinese invention patent " stirrer for desulphurization of molten iron, upper
On the basis of stating patent, a kind of three-blade stirrer is disclosed, and has advanced optimized stirring blade structure, extending neighboring stirring
Angle and space between blade reach dry slag between reducing blade, reduce dry slag cleaning mechanical damage, extend blender service life
Purpose.Above-mentioned patented technology achieves the certain effect for extending large stirrer service life, but main pass in actual production
The resisting breakage ability for infusing the stirring blade itself of blender fails to pay close attention to large stirrer bottom plane center molten iron rotating vortex
Influence, especially stirrer bottom planar central molten iron rotating vortex with blender swing quickly wave caused by blender bottom
Portion's central plane abrasion and its with stirring molten iron stirring rotation circumferential flow be superimposed to stirring blade bottom plane abrasion
Aggravation problem has contained the further extension of large stirrer service life.It can be seen that since blender breakage is still shown as
The breakage at stirring blade position, only stirring blade damaged part is changed, and stirrer bottom abrasion is embodied in mostly stirs
The damage aggravation of blade bottom is mixed, or occurs stirrer bottom once in a while prior to stirring blade, thus domestic and foreign scholars are extensive at present
It is concerned with the influence of stirring blade structure and its arrangement to blender service life, to occurring stirring after equipment enlarging
Mix device bottom damage problem fail to give enough attention, do not carry out relevant research work yet, not seen in related patents with
The document announcement of technical literature.For this purpose, on how to contain large stirrer bottom damage problem, it is necessary to carry out grinding for system
Study carefully.
Summary of the invention
That the object of the present invention is to provide a kind of structures is simple, easy to make, stirrer bottom resisting breakage ability is strong, uses
The blender of mechanical agitation desulfuration is used for before the pneumatic steelmaking of service life length outside molten iron furnace, which solve molten iron KR mechanical stirring devices
The problem of existing blender service life sharply declines after enlargement.
For above-mentioned purpose, a kind of blender for mechanical agitation desulfuration provided by the invention, it includes agitating shaft and sets
It sets in the connecting flange above agitating shaft, the agitating shaft lower end is disposed with stirring blade and stabilizer, the stirring
The internal layer of axis, stirring blade and stabilizer is hollow metal tube core, and hollow metal tube core top is connect with connecting flange,
Metal plug is provided on the hollow metal tube core lower end inner wall, the hollow metal die internal is inserted with forced air cooled tube, institute
It states forced air cooled tube top to connect with connecting flange, forced air cooled tube lower end nozzle and metal plug formation air outlet, the forced air cooled tube,
Metal plug and hollow metal tube core form cooling cavity, are provided with paddle on the metal die outer wall at the stirring blade
Piece metal core, the hollow metal tube core, stirring blade metal core and metal plug exterior face horizontal homogeneous are welded with V-arrangement anchoring
Part, the agitating shaft, stirring blade and stabilizer outermost layer one-piece casting have refractory material working lining.
Further, the flow straightener is rotation body structure, and the flow straightener diameter axially downwardly gradually subtracts along flow straightener
Small or constant, flow straightener bottom is plane or spherical crown surface structure.
Still further, the refractory material working lining radical length and stirring blade metal core at the stirring blade are radial
Length is axially downwardly gradually reduced along agitating shaft；Refractory material working lining lateral surface at the stirring blade is inclined-plane or arc
Face, the refractory material working lining lateral surface at the stirring blade intersect with the refractory material of stirring blade lining horizontal bottom or with
The intersection of flow straightener side；
Still further, the stirring blade metal core lateral surface is corresponding inclined-plane or arcwall face, the stirring blade
Metal core lateral surface intersects with stirring blade metal core horizontal bottom or intersects with the hollow metal tube core side at flow straightener.
Still further, the stirring blade quantity is 2~4.
Above-mentioned stirring blade meets untouchable area, and with routine KR blender stirring blade to meet untouchable area identical.
It is other identical as conventional KR desulfurization blender.
The beneficial effects of the present invention are:
The present invention is asked for what existing blender service life after the enlargement of molten iron KR mechanical stirring device sharply declined
Topic, the Wear cause for having carried out blender after equipment enlarging are analyzed.According to the analysis, due to mixing plant machining accuracy
Fluctuation, control process signal interference and blender breakage etc. be difficult to avoid that, cause mixing plant vibration, stirring work to be explained
Unstable, dynamically balanced deviation of blender rotation etc. is stated, to make to occur swinging in blender rotary course, vibrate, especially
Large-scale molten iron KR stirring desulphurization system, since hot-metal bottle size and burden rating are big, corresponding agitator size, power of agitator
Also big, stirring blade linear velocity greatly improves under the identical rotational speed condition of blender, the molten iron pressure that stirring blade is born with
Molten iron erosive wear increases, and the molten iron rotating vortex enhancing below of stirrer bottom center exacerbates stirring blade and blender
Uneven breakage between the molten iron erosive wear and stirring blade of bottom, the rotation dynamic balancing for promoting blender deviate, revolve
Switch is moved and mechanical oscillation, is further degrading the operating condition of blender, meanwhile, the molten iron rotation below of stirrer bottom center
Turning vortex follows the swing of blender quickly to wave with vibrating, and rotating vortex center is caused to drift about in stirrer bottom, promotes
The rotating vortex erosive wear of stirrer bottom center molten iron, especially stirring blade bottom outside region are born molten iron and are stirred
The superposition of rotation peripheral flow and stirrer bottom drift rotating vortex is mixed, molten iron erosive wear is especially serious, thus large-scale
Change mixing arm damage and be concentrated mainly on the bottom section of stirring blade, and it is damaged tight to occur serious stirrer bottom often
Weight, eventually leads to blender service life and sharply declines with the enlargement of molten iron stirring desulphurization equipment.
The present invention is based on caused blender service lifes after above-mentioned molten iron KR stirring desulphurization equipment enlarging sharply to decline
The reason of analyze, by the setting of flow straightener, contain that the following molten iron rotating vortex in stirrer bottom center follows blender to swing
Drift, reduce stirrer bottom center molten iron rotating vortex intensity below, contain stirrer bottom center molten iron below
Erosive wear of the rotating vortex to stirrer bottom；By the rotation body structure and rotary body diameter of flow straightener along flow straightener axis
To being gradually reduced downwards or constant, flow straightener bottom is that plane or spherical crown surface structure design, rotate the molten iron of stirrer bottom
Vortex abrasion is changed into the erosive wear of flow straightener, avoids stirrer bottom abrasion to the unfavorable shadow of blender service life
It rings.Axially downwardly gradually sloped inwardly by stirring blade lateral surface along agitating shaft and stirring blade lateral surface and stirring blade
Horizontal bottom intersection or the structure intersected with flow straightener rotation body side surface design, and reduce stirring blade base diameter, reduce
The linear velocity of stirring blade bottom slows down molten iron erosive wear process.The blender of air outlet is offered by bottom
The measure for the cooling cavity bottom that forced air cooled tube insertion is made of flow straightener metal core, agitating shaft metal core and metal plug, is realized
It is whole to the progress of flow straightener metal core, agitating shaft metal core and metal plug air-cooled, improve current stabilization under blender operating condition
The intensity and rigidity of device metal core, agitating shaft metal core and metal plug, reduce flow straightener metal core, agitating shaft metal core and
The refractory material that metal plug surface combines serves as a contrast average operating temperature, enhances the resistant to high temperatures of each position refractory material lining of blender
Damaged integration capability.Meeting untouchable area and routine KR blender stirring blade by stirring blade, to meet untouchable area identical, guarantees
With the stirring intensity for improving blender, that stablizes and improve blender is stirred characteristic and desulfurizing iron efficiency.
It can be seen that mechanical agitation desulfuration Novel mixer of the invention reduces stirring by abovementioned technology
Device bottom centre molten iron rotating vortex intensity below has delayed blender breakage process, has improved the comprehensive usability of blender
Can, the short deficiency of large stirrer service life can be effectively relieved, reach extension blender service life, reduction blender disappears
Consumption improves the comprehensive purposes such as large-scale molten iron KR stirring desulphurization Technological Economy direct selling.
Detailed description of the invention
Fig. 1 is the B- of the blender for mechanical agitation desulfuration for the flow straightener structure that bottom of the invention is planar structure
B sectional view；
Fig. 2 is the B- for the blender for mechanical agitation desulfuration that refractory material working lining lateral surface of the invention is inclined-plane
B sectional view；
Fig. 3 is the B-B sectional view for the blender for mechanical agitation desulfuration that bottom of the invention is spherical crown surface structure；
Fig. 4 is the A-A sectional view of the mechanical agitation desulfuration Novel mixer of four stirring blades；
Fig. 5 is the A-A sectional view of the mechanical agitation desulfuration Novel mixer of three pieces stirring blade；
Fig. 6 is the A-A sectional view of the mechanical agitation desulfuration Novel mixer of two panels stirring blade；
In figure, agitating shaft 1, connecting flange 2, stirring blade 3, stirring blade metal core 3.1, meet untouchable 3.2, stabilizer 4,
Metal plug 4.1, air outlet 4.2, hollow metal tube core 5, forced air cooled tube 6, cooling cavity 7, V-arrangement anchoring piece 8, refractory material work
Lining 9.
Specific embodiment
In order to better explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
The contents of the present invention are not limited solely to following embodiment.
Embodiment 1
As shown in Fig. 1,4~6: a kind of blender for mechanical agitation desulfuration, it includes that agitating shaft 1 and setting are being stirred
The connecting flange 2 of 1 top of axis is mixed, 1 lower end of agitating shaft is disposed with 2~4 stirring blades 3 and stabilizer 4, and flow straightener 4 is
Rotation body structure, 4 diameter of flow straightener is axially downwardly constant along flow straightener, and 4 bottom of flow straightener is planar structure.
The internal layer of agitating shaft 1, stirring blade 3 and stabilizer 4 is hollow metal tube core 5,5 top of hollow metal tube core with
Connecting flange 2 connects, and is welded with metal plug 4.1 on 5 lower end inner wall of hollow metal tube core, is inserted into inside hollow metal tube core 5
There is forced air cooled tube 6,6 top of forced air cooled tube is connect with connecting flange 2, and 6 lower end nozzle of forced air cooled tube and metal plug 4.1 form air outlet
4.2, forced air cooled tube 6, metal plug 4.1 and hollow metal tube core 5 form cooling cavity 7, to flow straightener metal core 3.1, agitating shaft
Metal core 1.1 and metal plug 3.3 carry out air-cooled；
It is provided with stirring blade metal core 3.1 on 5 outer wall of metal die at stirring blade 3, hollow metal tube core 5 stirs
It mixes blade metal core 3.1 and 4.1 exterior face horizontal homogeneous of metal plug is welded with V-arrangement anchoring piece 8, agitating shaft 1, stirring blade 3
There is refractory material working lining 9 with 4 outermost layer one-piece casting of stabilizer.
The metal core radical length of 9 radical length of refractory material working lining and stirring blade 3 at stirring blade 3 is along stirring
Axis is axially downwardly gradually reduced；9 lateral surface of refractory material working lining at stirring blade 3 is arcwall face, resistance at stirring blade 3
Fiery 9 lateral surface of material working lining intersects with the refractory material of stirring blade 39 horizontal bottoms of lining or intersects with 4 side of flow straightener；
3.1 lateral surface of stirring blade metal core is corresponding arcwall face, 3.1 lateral surface of stirring blade metal core and and current stabilization
Hollow metal tube core side intersection at device.
Stirring blade meet untouchable 3.2 area and routine KR desulfurization blender stirring blade to meet untouchable area identical.Its
It is identical as routine KR desulfurization blender.
Embodiment 2
As shown in Fig. 2,4~6: the structure of the present embodiment and 1 blender of embodiment is essentially identical, the difference is that:
4 diameter of flow straightener is axially downwardly gradually reduced along flow straightener, and flow straightener bottom is plane；Fire resisting at stirring blade
9 lateral surface of material working lining is inclined-plane.3.1 lateral surface of stirring blade metal core is corresponding inclined-plane.
Embodiment 3
As illustrated in figures 3-6: the structure of the present embodiment and 1 blender of embodiment is essentially identical, the difference is that:
4 diameter of flow straightener is axially downwardly gradually reduced along flow straightener, and 4 bottom of flow straightener is spherical crown surface structure.
The refractory material of stirring blade 3 serves as a contrast 9 lateral surfaces and intersects with the refractory material of stirring blade 39 horizontal bottoms of lining, stirs
3.1 lateral surface of blade metal core intersects with 3.1 horizontal bottom of stirring blade metal core.
Other unspecified parts are the prior art.Although above-described embodiment is made that the present invention and retouches in detail
State, but it is only a part of the embodiment of the present invention, rather than whole embodiments, people can also according to the present embodiment without
Other embodiments are obtained under the premise of creativeness, these embodiments belong to the scope of the present invention.
Claims (2)
1. a kind of blender for mechanical agitation desulfuration, it includes agitating shaft (1) and is arranged in the company above agitating shaft (1)
Acting flange (2), it is characterised in that: agitating shaft (1) lower end is disposed with stirring blade (3) and stabilizer (4), described to stir
The internal layer for mixing axis (1), stirring blade (3) and stabilizer (4) is hollow metal tube core (5), hollow metal tube core (5) top
End is connect with connecting flange (2), is provided with metal plug (4.1) on hollow metal tube core (5) lower end inner wall, described hollow
Metal die (5) is internal inserted with forced air cooled tube (6), and forced air cooled tube (6) top is connect with connecting flange (2), the forced air cooled tube
(6) lower end nozzle and metal plug (4.1) form air outlet (4.2), the forced air cooled tube (6), metal plug (4.1) and hollow gold
Belong to tube core (5) to be formed cooling cavity (7), stirring blade gold is provided on metal die (5) outer wall at the stirring blade (3)
Belong to core (3.1), the hollow metal tube core (5), stirring blade metal core (3.1) and metal plug (4.1) exterior face are horizontal
Even to be welded with V-arrangement anchoring piece (8), the agitating shaft (1), stirring blade (3) and stabilizer (4) outermost layer one-piece casting have fire resisting
Material working lining (9)；The stabilizer (4) be rotation body structure, stabilizer (4) diameter along stabilizer axially downwardly
It is gradually reduced or constant, stabilizer bottom (4) portion is plane or spherical crown surface structure；Refractory material work at the stirring blade (3)
(9) radical length and stirring blade metal core radical length is served as a contrast axially downwardly to be gradually reduced along agitating shaft；The stirring blade
Refractory material working lining (9) lateral surface at place is inclined-plane or arcwall face, the refractory material working lining at the stirring blade (3)
(9) lateral surface intersects with refractory material working lining (9) horizontal bottom of stirring blade (3) or intersects with stabilizer (4) side；
Stirring blade metal core (3.1) lateral surface is corresponding inclined-plane or arcwall face, the stirring blade metal core (3.1)
Lateral surface intersect with stirring blade metal core (3.1) horizontal bottom or with hollow metal tube core (5) side at stabilizer (4)
Intersection.
2. being used for the blender of mechanical agitation desulfuration according to claim 1, it is characterised in that: stirring blade (3) number
Amount is 2~4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610404158.4A CN106399621B (en) | 2016-06-08 | 2016-06-08 | Blender for mechanical agitation desulfuration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610404158.4A CN106399621B (en) | 2016-06-08 | 2016-06-08 | Blender for mechanical agitation desulfuration |
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| Publication Number | Publication Date |
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| CN106399621A CN106399621A (en) | 2017-02-15 |
| CN106399621B true CN106399621B (en) | 2019-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610404158.4A Active CN106399621B (en) | 2016-06-08 | 2016-06-08 | Blender for mechanical agitation desulfuration |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107435085B (en) * | 2017-07-17 | 2019-03-15 | 武汉钢铁有限公司 | The efficient mixing agitator of desulfurizing iron |
| CN108817853B (en) * | 2018-05-24 | 2019-09-10 | 常熟市南湖化工设备制造有限责任公司 | A kind of production method of blender |
| CN111729545B (en) * | 2020-06-11 | 2022-03-15 | 武汉钢铁有限公司 | Combined stirring blade metal core for molten iron KR desulfurization stirrer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005068506A (en) * | 2003-08-26 | 2005-03-17 | Sumitomo Metal Ind Ltd | Desulfurization method and equipment for molten iron |
| CN101037714B (en) * | 2007-04-26 | 2010-09-01 | 武汉钢铁(集团)公司 | Molten iron desulfurization stir head |
| JP5358987B2 (en) * | 2008-03-18 | 2013-12-04 | Ｊｆｅスチール株式会社 | Impeller of mechanical stirring desulfurization equipment |
| CN101643819B (en) * | 2008-08-08 | 2011-12-28 | 陈树村 | Rotary spray gun for use in molten iron desulfurization |
| CN101403022B (en) * | 2008-08-18 | 2010-12-15 | 武汉钢铁(集团)公司 | Desulfurization agitator head for hot metal |
| CN104212932B (en) * | 2014-07-30 | 2016-05-04 | 武汉钢铁(集团)公司 | Low cost consumption-type melten iron desulfur agitator and preparation method thereof |
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Effective date of registration: 20170627 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Applicant after: Wuhan iron and Steel Company Limited Address before: 430083 Qingshan District, Hubei, Wuhan Applicant before: WUHAN IRON AND STEEL CORPORATION |
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