CN108203750A - Desulfurization agitating paddle - Google Patents
Desulfurization agitating paddle Download PDFInfo
- Publication number
- CN108203750A CN108203750A CN201611181609.9A CN201611181609A CN108203750A CN 108203750 A CN108203750 A CN 108203750A CN 201611181609 A CN201611181609 A CN 201611181609A CN 108203750 A CN108203750 A CN 108203750A
- Authority
- CN
- China
- Prior art keywords
- agitating paddle
- metallic
- inorganic non
- insulating fabric
- metallic framework
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
- B01F27/053—Stirrers characterised by their elements, materials or mechanical properties characterised by their materials
-
- 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ceramic Products (AREA)
Abstract
The present invention relates to desulfurizing iron field more particularly to a kind of desulfurization agitating paddles.A kind of desulfurization agitating paddle, including metallic framework and cast bed of material, the surface of the metallic framework is arranged at intervals with several anchoring pieces, one layer of inorganic non-metallic layers of insulating fabric is additionally provided between the metallic framework and cast bed of material, the thickness of the fibrofelt is 5~15mm.The inorganic non-metallic layers of insulating fabric that the present invention is set can be by waterglass secure bond in steel structure surface, castable will not wash out inorganic non-metallic layers of insulating fabric when entering mould cast, and can utilize the surface of the fibrous out-of-flatness of inorganic non-metallic layers of insulating fabric and castable good combination；Metallic framework in agitating paddle after molding is because the heat-blocking action of inorganic non-metallic layers of insulating fabric substantially reduces expansion, heat shrinkable of inorganic non-metallic layers of insulating fabric itself can simultaneously absorb the swell value of a part of metallic framework, so as to reduce the possibility of castable cracking, the service life of agitating paddle is improved.
Description
Technical field
The present invention relates to desulfurizing iron field more particularly to a kind of desulfurization agitating paddles.
Background technology
KR stirring desulphurization methods are that nippon Guang field iron began one's study in 1963, and it is raw that nineteen sixty-five is applied to industry
A kind of External Desulfurization Technique From Melten Iron of production.This sulfur method is immersed in hot-metal bottle with the agitating paddle of an outer lining refractories
Rotational agitation molten iron is carried out, molten iron is made to generate vortex, the desulfurizing agent by weighing is added to molten iron surface, and revolved by dispenser
Scrollwork enters in molten iron, mixes, reacts with high temperature liquid iron, achievees the purpose that desulfurization.KR sulfur methods have desulfuration efficiency height, desulfurization
The features such as agent consumption is few, and the activity duration is short, and metal depletion is low and refractory consumption rate is low.Many steel mills use more and more
KR sulfur removal technologies.
Agitating paddle is the important component in KR desulfurizers, is made of rotary shaft and cross-blade.So agitating paddle
Claim blender or stirring-head.Agitating paddle core is cast for metal material, and working lining is the integrated poured molding of castable refractory.One
As agitating paddle be 4 leaf paddles, steel construction is also 4 leaves, steel structure surface setting anchoring piece.
After KR stirring desulphurizations technique is born, incipient popularization and application are slower, and main cause is that the service life of agitating paddle is relatively low,
System has pressed down the development of the sulfur removal technology.By long-term application and research, there is large increase in the service life of agitating paddle.In order to which KR takes off
The direct motion of sulphur stirring technique and reduction desulphurization cost, the service life of constantly improve agitating paddle is eternal subject.
Agitating paddle is used for clearance-type, it is desirable that castable has good thermal shock resistance, generally uses based on mullite
The fine and close castable of raw material.Agitating paddle is the complex of castable and steel construction, and under high temperature, the expansion ratio castable of steel construction is big
Much.In order to reduce the expansion of steel construction, Japan and Chinese the relevant technologies file are disclosed in one layer of drip of steel structure surface brushing
It is green, it is therefore an objective to the expansion of steel construction is absorbed by the interval formed after asphalt carbonization.This method actually attempted to, not bright
Effective fruit.
It is used for a long time and finds, the damage form of agitating paddle, mainly three aspects：
1）Agitating paddle cracks, and crackle expands, localized delamination
2）Erosive wear and erosion by high temperature liquid iron, blade become smaller
3）Steel construction expands, and makes agitating paddle longitudinal stretching, Bamboo-shaped recess occurs, usually forms transversal crack in mid blade,
The weak link easily infiltrated into as molten iron.
More situation is the blade local weak that agitating paddle is caused due to cracking and flaking off, it is impossible to be continued by repairing
Using and it is offline in advance, life expectancy is not achieved.Cracking is included gap and is expanded using caused thermal shock cracking and internal steel construction
Caused by cracking.
Agitating paddle uses the cracking occurred to the middle and later periods, it should which the expansion with steel construction has much relations.Because by height
Warm molten iron washes away erosion, and the thickness of castable is thinning, and the temperature of external molten iron easily transfers heat to internal steel construction, causes steel
Structure temperature is higher, and expansion is larger.Therefore, the expansion that prevention high temperature liquid iron transfers heat to steel construction and reduction steel construction is to need to solve
Certainly the problem of.
Invention content
The technical problems to be solved by the invention are to provide a kind of desulfurization agitating paddle, and the agitating paddle is in metallic framework and pours
One layer of inorganic non-metallic layers of insulating fabric is provided between material feeding, metallic framework is heat-insulated because of inorganic non-metallic layers of insulating fabric
Effect substantially reduces expansion, heat shrinkable of inorganic non-metallic layers of insulating fabric itself can simultaneously absorb the swollen of a part of metallic framework
Swollen value so as to reduce the possibility of castable cracking, improves the service life of agitating paddle.
The invention is realized in this way：A kind of desulfurization agitating paddle, including metallic framework and cast bed of material, the metal bone
The surface of frame is arranged at intervals with several anchoring pieces, and one layer of inorganic non-metallic is additionally provided between the metallic framework and cast bed of material
Layers of insulating fabric sets the position of inorganic non-metallic layers of insulating fabric, including the following central shaft in metallic framework surface and slag liquid face
Steel structure surface.The thickness of the fibrofelt is 5~15mm.
The spacing of the two neighboring anchoring piece is 100~120mm.
The inorganic non-metallic layers of insulating fabric is alumina silicate fiber felt.
Metallic framework includes central shaft steel construction and blade steel construction.
The cast bed of material is mullite pouring material.
Inventive desulfurization agitating paddle is provided with one layer of inorganic non-metallic heat insulation fiber between metallic framework and castable
Layer, inorganic non-metallic layers of insulating fabric can be by waterglass secure bonds in steel structure surface, and castable will not when entering mould cast
Inorganic non-metallic layers of insulating fabric is washed out, and can utilize inorganic non-metallic layers of insulating fabric fibrous out-of-flatness surface with
Castable good combination；Metallic framework in agitating paddle after molding is because the heat-blocking action of inorganic non-metallic layers of insulating fabric is big
Expansion is reduced greatly, heat shrinkable of inorganic non-metallic layers of insulating fabric itself can simultaneously absorb the swell value of a part of metallic framework,
So as to reduce the possibility of castable cracking, the service life of agitating paddle is improved.
Description of the drawings
Fig. 1 is the structure diagram of inventive desulfurization agitating paddle；
In figure：1 central shaft steel construction, 2 blade steel constructions, 3 inorganic non-metallic layers of insulating fabrics, 4 cast bed of material, 5 anchoring pieces, 6
Slag liquid face.
Specific embodiment
With reference to specific embodiment, the present invention is further explained.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after the content of the invention stated has been read, people in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
Such as Fig. 1, a kind of desulfurization agitating paddle, including metallic framework and cast bed of material 4, the surface of the metallic framework is arranged at intervals
There are several anchoring pieces 5, in the present embodiment, preferably, the anchoring piece 5 equidistantly arranges；The metallic framework and cast
One layer of inorganic non-metallic layers of insulating fabric 3 is additionally provided between the bed of material 4, the thickness of the fibrofelt 3 is 5~15mm；In this hair
In bright, preferably, metallic framework includes central shaft steel construction 1 and blade steel construction 2, the cast bed of material 4 is mullite cast
Material feeding.
The agitating paddle manufacture craft of the present invention is as follows：
1）In metallic framework surface soldered anchoring piece 5, in the present embodiment, preferably, between the two neighboring anchoring piece 5
Away from for 100~120mm, this increased anchoring piece spacing not only reduces the expansion of anchoring piece in itself, also helps setting nothing
3 layers of the nonmetallic layers of insulating fabric of machine；
2）With compressed air purging metallic framework, impurity and dust are removed；
3）Using heat insulation fiber felt setting inorganic non-metallic layers of insulating fabric 3, according to the spacing of anchoring piece 5, heat insulation fiber is cut
Felt, the width of heat insulation fiber felt is slightly narrower than anchoring piece, in order to fixation；
4）The uniform brushing liquid soluble glass bonding agent in metallic framework outer surface between anchoring piece 5；
5）In the present embodiment, using alumina silicate fiber felt as inorganic non-metallic layers of insulating fabric 3,5~15mm after cutting
Thick alumina silicate fiber felt is pasted onto on waterglass bonding agent；
6）Conserve more than 20h, it is ensured that the curing of waterglass bonding agent makes alumina silicate fiber felt firmly be bonded in metallic framework surface；
7）Branch mold, moulding by casting castable use fine and close castable of the mullite for main material.After castable maintenance baking i.e.
Complete the making of agitating paddle.
Agitating paddle was used to the middle and later periods, and resistance to material, which washes away, corrodes thinning, originally castable 200mm, it is assumed that erosion is thinning only
100mm, the temperature for transferring heat to steel construction are gradually increased, it is assumed that have reached 900 DEG C.The present invention increases heat insulation fiber felt, uses
The fibrofelt of 3mm, 5mm, 8mm, 10mm, 12mm and 14mm different-thickness, by the heat-insulated of fibrofelt, the temperature of steel construction drops
It is low, the temperature of steel construction is can obtain by Calculation of Heat Transfer.If the coefficient of thermal expansion of metallic framework that uses is 13 × 10-6/ DEG C, it stirs
Paddle insertion depth 1750mm is mixed, the swell increment of steel construction under high temperature is calculated, is shown in Table 1.Obviously, the present invention is by setting fibrofelt
Thermal insulation layer, the swell increment of steel construction are obviously reduced.
Table 1 is the quantitative prediction of swelling table of metallic framework in the embodiment of the present invention.
Claims (5)
1. a kind of desulfurization agitating paddle, including metallic framework and cast bed of material (4), the surface of the metallic framework is arranged at intervals with
Several anchoring pieces (5), it is characterized in that：Be additionally provided between the metallic framework and cast bed of material (4) one layer of inorganic non-metallic every
Thermal fiber layer (3), the thickness of the fibrofelt (3) is 5~15mm.
2. desulfurization agitating paddle as described in claim 1, it is characterized in that：The spacing of the two neighboring anchoring piece (5) is 100
~120mm.
3. desulfurization agitating paddle as claimed in claim 1 or 2, it is characterized in that：The inorganic non-metallic layers of insulating fabric (3) is
Alumina silicate fiber felt.
4. desulfurization agitating paddle as claimed in claim 3, it is characterized in that：The metallic framework includes central shaft steel construction (1)
With blade steel construction (2).
5. desulfurization agitating paddle as claimed in claim 3, it is characterized in that：The cast bed of material (4) is mullite pouring material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611181609.9A CN108203750A (en) | 2016-12-20 | 2016-12-20 | Desulfurization agitating paddle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611181609.9A CN108203750A (en) | 2016-12-20 | 2016-12-20 | Desulfurization agitating paddle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108203750A true CN108203750A (en) | 2018-06-26 |
Family
ID=62603135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611181609.9A Pending CN108203750A (en) | 2016-12-20 | 2016-12-20 | Desulfurization agitating paddle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108203750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114292114A (en) * | 2021-12-08 | 2022-04-08 | 鞍钢股份有限公司 | Method for preheating stirring paddle by Rhine method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403022A (en) * | 2008-08-18 | 2009-04-08 | 武汉钢铁(集团)公司 | Desulfurization agitator head for hot metal |
| CN101603111A (en) * | 2009-02-17 | 2009-12-16 | 武汉钢铁(集团)公司 | A kind of stirrer for desulphurization of molten iron |
| CN102022922A (en) * | 2010-12-07 | 2011-04-20 | 宜兴市瑞华新型炉料厂 | Manufacturing method for prolonging service life of KR stirrer |
-
2016
- 2016-12-20 CN CN201611181609.9A patent/CN108203750A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101403022A (en) * | 2008-08-18 | 2009-04-08 | 武汉钢铁(集团)公司 | Desulfurization agitator head for hot metal |
| CN101603111A (en) * | 2009-02-17 | 2009-12-16 | 武汉钢铁(集团)公司 | A kind of stirrer for desulphurization of molten iron |
| CN102022922A (en) * | 2010-12-07 | 2011-04-20 | 宜兴市瑞华新型炉料厂 | Manufacturing method for prolonging service life of KR stirrer |
Non-Patent Citations (1)
| Title |
|---|
| 陈照峰: "《无机非金属材料学》", 29 February 2016, 西北工业大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114292114A (en) * | 2021-12-08 | 2022-04-08 | 鞍钢股份有限公司 | Method for preheating stirring paddle by Rhine method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180626 |
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| WD01 | Invention patent application deemed withdrawn after publication |