CN101603111A - A kind of stirrer for desulphurization of molten iron - Google Patents
A kind of stirrer for desulphurization of molten iron Download PDFInfo
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- CN101603111A CN101603111A CNA2009100607704A CN200910060770A CN101603111A CN 101603111 A CN101603111 A CN 101603111A CN A2009100607704 A CNA2009100607704 A CN A2009100607704A CN 200910060770 A CN200910060770 A CN 200910060770A CN 101603111 A CN101603111 A CN 101603111A
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- desulphurization
- agitating vane
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Abstract
The present invention relates to the agitator of the outer stirring desulphurization of the preceding molten iron stove of converter steelmaking.It solves the deficiencies such as discharge that the dry slag between paddle that exists at present is more, paddle back iron basifacial vorticity is unfavorable for being involved in desulfurization slag greatly.Measure: a kind of stirrer for desulphurization of molten iron, by metal-cored 2, V-arrangement riveting component 3, the refractory materials lining 4 of forming turning axle 1 and metal chip 6, V-arrangement riveting component 7, double V shape riveting piece 8, the refractory materials of forming agitating vane 5 serve as a contrast 9 and forced air cooled tube 10 form, its agitating vane 5 on turning axle 1 is three, and uniform distribution; Agitating vane 5: meet molten iron face 11 from bottom to top the front rake α on inclined-plane be 4.1 °～30 °, the back iron water surface 12 from bottom to top front rake β on inclined-plane is 0.1 °～30 °, the outer side 13 from bottom to top camber angle γ on inclined-plane is 4.1 °～15 °.Excellent, the long service life, simple in structure of dry slag dynamic conditions few, stirring desulphurization between the paddle of the present invention.
Description
Technical field
The present invention relates to the agitator of the outer stirring desulphurization of the preceding molten iron stove of converter steelmaking, specifically a kind of pretreated agitator of iron ladle KR stirring desulphurization that is used for.
Background technology
KR (Kambara Reactor) stirring desulphurization method is that Japanese Nippon Steel began one's study in 1963, nineteen sixty-five is applied to industrial a kind of external desulfurization of hot metal technology, this sulfur method is to immerse in the iron ladle with the stirring-head of an outer lining refractories to be rotated the stirring molten iron, make molten iron produce vortex, sweetening agent through weighing joins the molten iron surface by material feeder, and be involved in the molten iron by vortex, mix, react with high temperature liquid iron, reach the purpose of desulfurization.Characteristics such as this sulfur method has the desulfuration efficiency height, and sorbent consumption is few, and the activity duration is short, and the low and refractory consumption rate of metal consume is low.
Agitator is the vitals in the KR desulfurizer, is made up of turning axle and paddle, and four paddles are evenly arranged along the circumferential across of turning axle.Turning axle and paddle are made of metal inner core and refractory materials working lining.The paddle of conventional whisk is met the untouchable scarp that is, leans forward 2～4 ° from bottom to top; The back iron face is a vertical surface; The side also is the scarp, also is 2～4 ° of flares from bottom to top.Because the high temperature service intermittent state of agitator and to the violent stirring of molten iron, the agitator molten iron washes away acutely, and cold and hot state is alternately frequent, causes agitator to be lacked work-ing life; In the stirring desulphurization process and stand-by process of cooling of agitator,, cause paddle refractory materials working lining thermal shock be full of cracks serious because the paddle heat exchange area per unit volume is big; Since the difference of working lining refractory materials and metal-cored material hot expansibility and paddle be metal-cored do not carry out air-cooled, cause metal-cored inconsistent with the working lining amount of expanding with heat and contract with cold, cause and form heat expansion internal stress and shrinkage gap between bonding surface, cause the breakage of refractory materials working lining internal stress, constantly expand along decreasing the slit in the bonding surface by the molten iron that crackle infiltrates, finally cause working lining to peel off and lose with metal-cored burning; During stirring, rotational line speed improves along with the increase of stirring diameter, because the overhanging structure of paddle, aggravated the erosive wear of molten iron to paddle, especially the arris of paddle protrudes the position, it is particularly serious to wear and tear, and along with the continuous use of agitator, the paddle arris constantly weares and teares and forms the arc transition face, speed of rotation in agitator under the mixing torque improves constantly, further aggravate the rate of wear of paddle, thereby influenced stirring desulphurization effect and actual production operation control under the different operational phases of agitator, caused desulfuration efficiency decline and sorbent consumption to rise; Simultaneously, the raising of the uneven wear of paddle and agitator speed of rotation has influenced the transient equilibrium and the statical equilibrium of agitator, has aggravated the damage of Mixing Machine transmission apparatus, brings harm for the safe and stable operation of equipment.In addition, in the actual stirring desulphurization process, because the viscous flow effect at leaf angle position, cause a large amount of desulfurization slag and molten iron mixture to stop at this region clustering, and under hot conditions, cause dry slag, and, cause the scarfing cinder difficulty big because this regional space is narrow and small by erosion, infiltration to the refractory materials working lining, and then the effective active area and the stirring intensity of paddle, the dynamic conditions of the molten iron stirring desulphurization of deterioration have been reduced.Thereby the breakage of agitator mainly concentrates on the paddle position, finally because of the serious damage of paddle structural integrity, the decline significantly of stirring intensity and the use that dynamically balanced unstability stops agitator.For this reason, consider from the damaged process angle of slowing down agitator refractory materials working lining, it is the stirring-head of arc transition face that Chinese patent " novel KR desulfur agitator " ZL200620095492.8 discloses the metal-cored corner angle of a kind of paddle limit, reduces because the breakage that the stress concentration of internal stress that working lining refractory materials and metal-cored material hot expansibility difference cause and paddle edge regions causes.It is metal-cored with air-cooled agitator that Chinese patent " desulfurization agitator head for hot metal " ZL200720084352.5 discloses a kind of paddle, reduced the metal-cored integrated temperature of paddle when using, alleviate the metal-cored thermal expansion with the refractory materials working lining of paddle, improved the comprehensive resisting breakage ability of paddle.In addition, meet untouchable stirring at the conventional whisk small angle inclination and entrainment the low deficiency of intensity, consider from the angle of strengthening the agitator stirring intensity, Chinese patent " a kind of desulfurization agitator head for hot metal " ZL200720084348.9 discloses a kind of paddle and has met and untouchablely be the melten iron desulfur agitator on flare inclined-plane from bottom to top for preceding concave arc surface, back iron face are last recessed protruding multistage arc, side, by the polymorphic structure paddle, reach and improve stirring-head the stirring of sweetening agent is entrainmented intensity, improved the purpose of desulfurization dynamic conditions.But above-mentioned patent and the conventional agitator that uses are four leaf cruciform decoration forms, angle is 90 ° between the paddle, for the dry slag between the paddle is provided convenience, simultaneously, be subjected to the disturbing influence of next paddle stream field, cause paddle back iron basifacial vorticity big, be unfavorable for being involved in the discharge of desulfurization slag, worsened the dynamic conditions of stirring desulphurization.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned patent and routine techniques, provide a kind of between paddle excellent, the long service life of dry slag dynamic conditions few, stirring desulphurization, stirrer for desulphurization of molten iron simple in structure, easy to make.
Realize the technical measures of above-mentioned purpose:
A kind of stirrer for desulphurization of molten iron, serve as a contrast and forced air cooled tube is formed by metal-cored, the V-arrangement riveting component of forming turning axle, refractory materials lining and metal chip, V-arrangement riveting component, double V shape riveting piece, the refractory materials of forming agitating vane, it is: the agitating vane that is installed on the turning axle is three, and around the turning axle uniform distribution; Agitating vane: meet the molten iron face from bottom to top the front rake α on inclined-plane be 4.1 °～30 °, the back iron water surface from bottom to top front rake β on inclined-plane is 0.1 °～30 °, the outer side from bottom to top camber angle γ on inclined-plane is 4.1 °～15 °.
It is: the molten iron face of meeting of the agitating vane from bottom to top front rake α on inclined-plane is 5 °～15 °, and the back iron water surface from bottom to top front rake β on inclined-plane is 5 °～15 °.
The design of three paddles of the present invention, simplified the structure of agitator, made things convenient for the making of agitator, enlarged the space between the paddle, reduced influencing each other between the blade, improved the stirring intensity of blade, slow down the dry slag speed at leaf angle position, be convenient to the cleaning of dry slag, and strengthened the intensity of entrainmenting that stirs, reduced the vorticity of back iron face, be convenient to the discharge of sweetening agent, improved the use properties of desulfurizing iron dynamic conditions and agitator, it is low that equal stirring intensity stirs speed of rotation down, slow down the damaged process of agitator, reached the prolongation agitator purpose in work-ing life.
Description of drawings
Fig. 1 is a kind of structural representation of stirrer for desulphurization of molten iron
Fig. 2 is an A-A sectional structure synoptic diagram among Fig. 1
Fig. 3 is the shape synoptic diagram of single blade among Fig. 2
Embodiment
Describe in further detail below in conjunction with accompanying drawing:
The novel stirring-head of a kind of desulfurizing iron, by metal-cored 2, V-arrangement riveting component 3, the refractory materials lining 4 of forming turning axle 1 and metal chip 6, V-arrangement riveting component 7, double V shape riveting piece 8, the refractory materials of forming agitating vane 5 serve as a contrast 9 and forced air cooled tube 10 form.Agitating vane 5 constitutes by three.
In following examples, forced air cooled tube 10 all selects No. 15 weldless steel tubes to make; Select 20CrMo or 30CrMo heavy wall casting steel pipe manufacturing metal-cored 2; The height of V-arrangement riveting component 3, V-arrangement riveting component 7 and double V shape riveting piece 8 is 1/2～2/3 of a refractory materials working lining thickness, wherein, V-arrangement riveting component 3 adopts common wire rod to make, the wire rod diameter is 8mm, V-arrangement riveting component 7 adopts the external fin reinforcement fabrication, and bar diameter is 10mm, and double V shape riveting piece 8 adopts common wire rod or heating resisting metal silk to make, the wire rod diameter is 8mm, heating resisting metal filament diameter 6mm; V-arrangement riveting component 7 and double V shape riveting piece 8 are arranged arrangement pitch 100mm or 80mm at interval.Metal chip 6 adopts the Q235 Plate Steel to make, and arris is the arc transition face, and arc radius is 20mm, and one deck silicon sol binding buffer heat insulating coat buffer coating is smeared on the surface, and it is the arc transition face that refractory materials serves as a contrast 9 arris, and arc radius is 40mm.Behind metal-cored 2 processing and fabricatings of stirring-head, the employing flame-proof pouring material special carries out stir shaft refractory materials working lining 4 and paddle refractory materials working lining 9 carries out casting.
The embodiment tabulation
| Embodiment | Meet molten iron inclination alpha in front | Back iron water surface front rake β | Outer side camber angle γ |
| 1 | 4.2 | 1 | 4.1 |
| 2 | 5 | 5.5 | 5 |
| 3 | 10 | 12 | 8 |
| 4 | 15 | 15 | 10 |
| 5 | 20 | 19 | 12 |
| 6 | 23 | 23 | 15 |
| 7 | 26 | 30 | 4.5 |
| 8 | 30 | 26 | 8 |
Claims (2)
1, a kind of stirrer for desulphurization of molten iron, serve as a contrast (9) and forced air cooled tube (10) is formed by metal-cored (2) of forming turning axle (1), V-arrangement riveting component (3), refractory materials lining (4) and metal chip (6), V-arrangement riveting component (7), double V shape riveting piece (8), the refractory materials of forming agitating vane (5), it is characterized in that: the agitating vane (5) that is installed on the turning axle (1) is three, and around turning axle (1) uniform distribution; Agitating vane (5): meet molten iron face (11) from bottom to top the front rake α on inclined-plane be 4.1 °～30 °, the back iron water surface (12) the from bottom to top front rake β on inclined-plane is 0.1 °～30 °, and outer side (13) the from bottom to top camber angle γ on inclined-plane is 4.1 °～15 °.
2, a kind of stirrer for desulphurization of molten iron as claimed in claim 1, it is characterized in that: the molten iron face of meeting (11) of agitating vane (5) the from bottom to top front rake α on inclined-plane is 5 °～15 °, and the back iron water surface (12) the from bottom to top front rake β on inclined-plane is 5 °～15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100607704A CN101603111B (en) | 2009-02-17 | 2009-02-17 | Stirrer for desulphurization of molten iron |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100607704A CN101603111B (en) | 2009-02-17 | 2009-02-17 | Stirrer for desulphurization of molten iron |
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| CN101603111A true CN101603111A (en) | 2009-12-16 |
| CN101603111B CN101603111B (en) | 2010-08-18 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857912A (en) * | 2010-05-28 | 2010-10-13 | 武汉钢铁(集团)公司 | Turbine type stirrer used for molten iron mechanical stirring desulfuration |
| CN102154533A (en) * | 2011-05-09 | 2011-08-17 | 武汉钢铁(集团)公司 | Jet stirrer for mechanical stirring and desulfurizing of molten iron |
| CN104212932A (en) * | 2014-07-30 | 2014-12-17 | 武汉钢铁(集团)公司 | Low-cost consumable molten iron desulphurization mixer and preparation method thereof |
| CN105132609A (en) * | 2015-10-10 | 2015-12-09 | 武汉钢铁(集团)公司 | Rotary blowing desulphurization spray gun applicable to molten iron jars of various dimensions or various desulfurizing agents |
| JP2015221427A (en) * | 2014-05-22 | 2015-12-10 | ポスコ | Stirrer |
| CN108203750A (en) * | 2016-12-20 | 2018-06-26 | 宝山钢铁股份有限公司 | Desulfurization agitating paddle |
| JP2018150620A (en) * | 2017-03-13 | 2018-09-27 | Ｊｆｅスチール株式会社 | Method for using monolithic refractory, method for operating molten steel treatment equipment, desulfurization method for molten steel, and pretreatment method for molten steel |
| CN109758955A (en) * | 2019-01-29 | 2019-05-17 | 武汉钢铁有限公司 | Molten iron self-excited oscillation pulse stirring desulphurization blender |
| CN111729545A (en) * | 2020-06-11 | 2020-10-02 | 武汉钢铁有限公司 | Combined stirring blade metal core for molten iron KR desulfurization stirrer |
| CN112029960A (en) * | 2020-08-31 | 2020-12-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Molten iron blowing stirring head and composite blowing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102022922B (en) * | 2010-12-07 | 2012-09-05 | 宜兴市瑞华新型炉料厂 | Manufacturing method for prolonging service life of KR stirrer |
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2009
- 2009-02-17 CN CN2009100607704A patent/CN101603111B/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857912A (en) * | 2010-05-28 | 2010-10-13 | 武汉钢铁(集团)公司 | Turbine type stirrer used for molten iron mechanical stirring desulfuration |
| CN101857912B (en) * | 2010-05-28 | 2011-08-10 | 武汉钢铁(集团)公司 | Turbine type stirrer used for molten iron mechanical stirring desulfuration |
| CN102154533A (en) * | 2011-05-09 | 2011-08-17 | 武汉钢铁(集团)公司 | Jet stirrer for mechanical stirring and desulfurizing of molten iron |
| CN102154533B (en) * | 2011-05-09 | 2012-07-25 | 武汉钢铁(集团)公司 | Jet stirrer for mechanical stirring and desulfurizing of molten iron |
| JP2015221427A (en) * | 2014-05-22 | 2015-12-10 | ポスコ | Stirrer |
| CN104212932A (en) * | 2014-07-30 | 2014-12-17 | 武汉钢铁(集团)公司 | Low-cost consumable molten iron desulphurization mixer and preparation method thereof |
| 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 |
| CN105132609A (en) * | 2015-10-10 | 2015-12-09 | 武汉钢铁(集团)公司 | Rotary blowing desulphurization spray gun applicable to molten iron jars of various dimensions or various desulfurizing agents |
| CN105132609B (en) * | 2015-10-10 | 2017-11-07 | 武汉钢铁有限公司 | Suitable for different model hot-metal bottle or the rotary blowing desulfuring spray gun of different desulfurizing agents |
| CN108203750A (en) * | 2016-12-20 | 2018-06-26 | 宝山钢铁股份有限公司 | Desulfurization agitating paddle |
| JP2018150620A (en) * | 2017-03-13 | 2018-09-27 | Ｊｆｅスチール株式会社 | Method for using monolithic refractory, method for operating molten steel treatment equipment, desulfurization method for molten steel, and pretreatment method for molten steel |
| CN109758955A (en) * | 2019-01-29 | 2019-05-17 | 武汉钢铁有限公司 | Molten iron self-excited oscillation pulse stirring desulphurization blender |
| CN111729545A (en) * | 2020-06-11 | 2020-10-02 | 武汉钢铁有限公司 | Combined stirring blade metal core for molten iron KR desulfurization stirrer |
| CN112029960A (en) * | 2020-08-31 | 2020-12-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Molten iron blowing stirring head and composite blowing method |
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| CN101603111B (en) | 2010-08-18 |
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Effective date of registration: 20170817 Address after: 430083 Qingshan District, Hubei, Wuhan factory before the door No. 2 Co-patentee after: Wuhan Hongdi Energy Saving Material Co., Ltd. Patentee after: Wuhan iron and Steel Company Limited Address before: 430083 Qingshan District, Hubei, Wuhan Co-patentee before: Wuhan Hongdi Energy Saving Material Co., Ltd. Patentee before: Wuhan Iron & Steel (Group) Corp. |
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