CN201347440Y - Inner shielding cover for vacuum oxygen decarbonization ladle furnace - Google Patents
Inner shielding cover for vacuum oxygen decarbonization ladle furnace Download PDFInfo
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- CN201347440Y CN201347440Y CNU2009200668582U CN200920066858U CN201347440Y CN 201347440 Y CN201347440 Y CN 201347440Y CN U2009200668582 U CNU2009200668582 U CN U2009200668582U CN 200920066858 U CN200920066858 U CN 200920066858U CN 201347440 Y CN201347440 Y CN 201347440Y
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- inner shield
- shielding cover
- ladle furnace
- vacuum
- inner shielding
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Abstract
The utility model discloses an inner shielding cover for a vacuum oxygen decarbonization ladle furnace; a temperature measuring and sampling hole, an oxygen lance hole, a feeding hole and an observation hole are formed at the upper part of the casing of the inner shielding cover; the inner shielding cover further comprises a plurality of air guiding holes and a plurality of air guiding hole plugs, wherein the air guiding holes are formed at the lower part of the casing in the circumferential direction; and the air guiding hole plugs are connected with the air guiding holes in a sealing manner. Through the application of the taper air guiding holes and hole plugs arranged on the inner shielding cover of a VOD (vacuum oxygen decarbonization ladle furnace), the utility model can effectively improve the problem of unsmooth smoke guiding operation in the VOD furnace, and can feasibly and reasonably arrange airflow channels, so as to improve the use efficiency of the inner shielding cover. Meanwhile, the utility model avoids the defects of easy explosion and scaling of the refractory material caused by the uneven heat exposure of the refractory material and the steel casing in the traditional one-sided refractory material VOD inner cover, intensifies the integral structure and improves the service life of the inner shielding cover. The utility model solves the problems that the service life and the like of the inner shielding cover are affected due to the flue gas accumulation in the furnace, incapable operation and control and abnormal loss of the refractory material, ensures the security and the reliability of the operation. In addition, the utility model has the advantages of simple structure, higher reliability and convenient routine maintenance.
Description
Technical field
The utility model relates to metallurgical external refining equipment, relates in particular to the inner shield lid that the decarburization of a kind of vacuum oxygen is used.
Background technology
VOD (decarburization of vacuum oxygen) stove is a kind of important furnace outer refining process equipment of iron and steel enterprise, main effect aborning is after hanging in vacuum tank by ladle, adopt vapor jet pump to carry out vacuum outgas, adopt ladle bottom blowing to go into argon gas simultaneously and stir molten steel, can remove obnoxious flavoures such as hydrogen in the molten steel, nitrogen, and further reduce oxygen, sulphur equal size in the steel, finally obtain than the molten steel of high cleanliness and the material of superior performance.VOD also can function as follows simultaneously: 1) even molten steel temperature, 2) remove inclusion, 3 in the molten steel) the control inclusion morphology.Because of having above-mentioned well-refined effect, Baosteel has built up many VOD equipment at present.
VOD inner shield lid is as the key component in the VOD main equipment, and closure is on the bag mouth of ladle when VOD handles.As shown in Figure 1, A ladle pedestal wherein, C vacuum tank, G VOD inner shield lid, K air flow line, 1 thermometric thief hole, 2 oxygen rifle holes, 3 charge cavitys, 4 vision slits.Have function holes such as vision slit 4, oxygen rifle hole 2, charge cavity 3 on the screening cover G, the function of air scavenge in the ladle has been undertaken simultaneously as the not only supply equipment use of equipment operation passage in the above-mentioned functions hole when vacuum-treat.
The problem that exists is at present, and after utilizing the above-mentioned functions hole, the flue gas that produces in the ladle during VOD vacuum is just discharged and only relied on above-mentioned hole position, and it is not smooth to lead the cigarette effect.(as adding Al etc.) moment can produce bigger exhaust gas volumn when particularly C-O reaction is fierce in the VOD stove, during furnace charge, cause vision slit 4 to observe, be unfavorable for technology controlling and process and operational safety.Make for the external bracing iron-clad adds inner mould material through the common structure of investigation VOD inner shield lid G simultaneously.Because of being subjected to high bake for a long time, anti-material is different with the expanded by heating of outside iron-clad, easily causes cracking, the peeling phenomenon of the anti-material of liner, causes the inner shield lid life-span to be reduced, and is unfavorable for that equipment normally uses.Inner shield lid structure formation is all shielding cage packet mode as being representative with certain 150 tons of VOD of electric furnace subsidiary factory of company, and its characteristics are that outer box hat adds the internal layer casting lining of anti-the material and makes, and all have defective mentioned above.
Chinese patent notification number: CN2290607 is a kind of small size vacuum refining furnace, it is characterized in that forming by a band pit dolly that is provided with the steel teeming ladle of the communicating pipe of linking up upper and lower vacuum chamber, liftable vacuum bell, can moves in orbit, vacuum bell and the sealing of steel teeming ladle upper flanges constitute goes up vacuum chamber, pit under the steel teeming ladle on end flanges and the movable trolleys constitutes vacuum chamber down, because of its no inner shield lid design, so get in touch with the compound VOD inner shield lid non-structure of the detachable gas port of band of the present invention.
Chinese patent notification number: CN85103477 is a kind of equipment for vacuum refining of molten steel, and its principal claim is the equipment for vacuum refining of molten steel.Its device can carry out heating under vacuum outgas, vacuum-oxygen decarbonizing or the vacuum to molten steel.Device comprises: lay ladle and have the fixedly vacuum tank that the argon gas device is stirred in automatic connection for one; A jib that rotates around bearing is suspending the vacuum cover that spray gun is installed in midair; A jib that rotates around bearing is equipped with heating system, and the water-cooled contact tube and the vacuum-sealing head that are suspending in midair by compound electrode carry out dynamically and the vacuum cover of static sealing; Thermometric and sampling unit under all being equipped with on each vacuum cover by the vacuum of Pneumatic elevation.This patent does not design the inner shield lid yet, so get in touch with nothing of the present invention.
Chinese patent notification number: CN2720319 is a kind of superconducting tubular oven.Comprise housing, lining, combustion barrel, chimney, burner hearth, import and export pipe, back up pad, peace seat, explosive door, it is characterized in that it also comprises tubulation shielding well heater, in tubulation shielding well heater, heating unit is a tubulation, the structure of tubulation is the punching tubular construction, and interior pipe passes sleeve pipe, forms airtight annular space between interior pipe and the sleeve pipe, sleeve pipe on the tubulation is the vacuum superconductive heat pipe that superconductive medium is housed, and interior pipe is the weldless steel tube of heated medium.The conduit of this patent design is used for the heating of medium, is different from the air guide effect of the gas port of the described inner shield lid of the design, also is very different by structural applications simultaneously, so conflict with nothing of the present invention.
Summary of the invention
The purpose of this utility model provides a kind of vacuum oxygen decarburization ladle furnace use inner shield lid, effectively solves the not smooth problem of cigarette of leading in the VOD stove.Avoid in the anti-material formula of the traditional single face VOD inner cap anti-material and the box hat inhomogeneous disadvantage that causes anti-material explosion, peels off of being heated, make one-piece construction strengthen the work-ing life of having improved equipment.Solution is gathered because of inner flue gas of the stove, and can't operate control and the unusual loss of anti-material influences problems such as service life of equipment, has guaranteed security, the reliability of operation.Simple in structure, reliability is higher, and routine maintenance is convenient.
Technical conceive of the present utility model is as follows:
1) the VOD inner shield lid form of Cai Yonging is different from traditional " semicircle " type for " ladder type ", increased the processing space, reduce the bonding phenomenon of splashing of cold slag, be beneficial to the work-ing life of improving screening cover, be beneficial to the layout of the described detachable gas port of the design simultaneously.
2) adopt the anti-equipment structure of combined type, make skeleton by steel plate in the middle of promptly, be welded with the anchoring piece of fixing anti-material mould material in the steel plate frame both sides, open some heat conduction apertures on the steel plate, diathermanous when being convenient to anti-material baking.Anti-material is heated evenly in the use, and is incrust, more increased the work-ing life of screening cover.
3) all carry out the cast (be different from traditional single face cast) of mould material in the steel plate frame both sides, the stability and the refractoriness of guaranteeing to pour into a mould the anti-material in back simultaneously by corresponding baking system are strengthened one-piece construction.Solve anti-material because of being subjected to long-time temperatures involved, damaged serious problem, guaranteed security, the reliability of operation.
4) also have some tapering gas ports that penetrate at this VOD inner shield lid side circle, and cooperate with detachable tapering stopple.Because of its position in the screening cover side, be more conducive to air guide than the functional hole that is arranged in the top, reduced the inner flue gas of the stove amount when big vision slit can't observe, be unfavorable for the hidden danger of technology controlling and process and operational safety.
5) gas port combination is formed by being arranged in the tapered hole that inner shield covers and the detachable stopple of anti-material of band tapering, therefore have and to carry out the characteristics that gas channel is arranged by on-the-spot actual requirement, be convenient to utilize to greatest extent the suction force of vacuum pump group, satisfy the demand of advancing pump fast.This tapering of anti-material stopple also is convenient to on-the-spot actual replacing simultaneously, to improving the described VOD inner shield lid of the design bulk life time bigger benefit is arranged.
6) this VOD inner shield lid form can be leveraged in LFV (submerged arc heating ladle vacuum oven), VD (vacuum degassing furnace), SSVOD (strong mixing vacuum-oxygen decarbonizing stove), the VODK multiple equipment for vacuum refining such as (vacuum-oxygen decarbonizing converters) simultaneously, and higher practicality and promotional value are arranged.
7) this VOD inner shield lid steel inner frame can reuse, and the recycling property of resource and the improvement of environment are had than high yield, more can reduce processing cost.
The purpose of this utility model is achieved in that
A kind of vacuum oxygen decarburization ladle furnace use inner shield lid, its housing top has the thermometric thief hole, oxygen rifle hole, charge cavity and vision slit also comprise: some gas ports, along circumferentially being located at lower housing portion; Some air guide stopples are tightly connected with gas port.
Described gas port and gas port are equipped with tapering beyond the Great Wall, and the opening of gas port is outer little interior big.
The material of described air guide stopple is a corundum pouring material, is provided with a stiffening web in it.
The section on described housing top is trapezoidal.
Described housing comprises a skeleton, and the outer side top-pour is marked with anti-material in the skeleton.
Described anti-material is a corundum pouring material, and skeleton is for strengthening steel plate.
Outer side is provided with some anchoring pieces of anti-the material in the described skeleton.
Also be provided with some louvres on the described skeleton.
The utility model makes it compared with prior art owing to adopted above technical scheme, has the following advantages and positively effect:
1) has detachable tapering gas port structure, gas port is formed by being arranged in hole body and the tapering stopple that the VOD inner shield covers, stopple is detachable so that favorably situated air-flow running route, the big exhaust gas volumn that produces when elimination is handled because of VOD, cause that to lead the cigarette effect not smooth, vision slit can't be observed, and is unfavorable for the problem of technology controlling and process and operational safety.
2) the air guide stopple that has a certain taper can prevent its accidental when handling.
3) improve anti-material work-ing life, can eliminate the anti-material of the anti-material formula of traditional single face bell and the box hat inhomogeneous disadvantage that causes anti-material explosion, peels off of being heated, make the one-piece construction reinforcement.Solve anti-material because of being subjected to long-time temperatures involved, damaged serious problem, guaranteed security, the reliability of operation, more increased the work-ing life of screening cover.
4) cooperate rational anti-material cast baking process, increased the work-ing life of equipment.
Description of drawings
Fig. 1 is the VOD inner shield lid and the air-flow synoptic diagram of prior art.
Fig. 2 is a VOD inner shield lid scheme of installation of the present utility model.
Fig. 3 is VOD inner shield lid of the present utility model and air-flow synoptic diagram.
Fig. 4 is a VOD inner shield lid sectional view of the present utility model.
Fig. 5 is a VOD inner shield lid gas port sectional view of the present utility model.
Fig. 6 is an air guide stopple stereographic map of the present utility model.
Fig. 7 is a steel structure framework sectional view of the present utility model.
Fig. 8 is a VOD inner shield lid shell structure sectional view of the present utility model.
Fig. 9 is a baking graphic representation of the present utility model.
Among the figure, A ladle seat base, B bracing frame, C vacuum tank, the D sealed cistern, the E vacuum container cover, F is anchored part, G VOD inner shield lid, the H sealing cover, I peep hole, J bleed-out dish, K air flow line, 1 thermometric thief hole, 2 oxygen rifle holes, 3 charge cavitys, 4 vision slits, 5 gas ports, 6 air guide stopples, 7 stiffening webs, 8 skeletons, 9 louvres, 10 anchoring pieces of anti-material the, 11 corundum pouring materials.
Embodiment
As Fig. 2, shown in 3, A ladle seat base wherein, B bracing frame, C vacuum tank, D sealed cistern, the E vacuum container cover, F is anchored part, G VOD inner shield lid, H sealing cover, I peep hole, J bleed-out dish, the K air flow line, 1 thermometric thief hole, 2 oxygen rifle holes, 3 charge cavitys, 4 vision slit (see figure 1)s.The VOD inner shield lid of present embodiment has kept former thermometric thief hole 1, oxygen rifle hole 2, charge cavity 3 and vision slit 4.
As Fig. 3,4 and shown in Figure 5, the lower housing portion of present embodiment is along circumferentially having several (embodiment is 9) detachable tapering gas ports 5, and these gas port 5 openings are " outer little interior big ".
As shown in Figure 6, also comprise several (embodiment is 9) air guide stopples 6, its shape is corresponding with gas port 5, with gas port 5 (see figure 5) that is tightly connected.Air guide stopple 6 adopts corundum pouring material.Its middle part is strengthened by stiffening web 7, and the section of stiffening web 7 is inverted trapezoidal structure.During because of the VOD vacuum, the suction force direction comes off because of suction causes when handling for preventing tapering air guide stopple 6 from inside to outside, thus gas port 5 openings are designed to " outer little interior big " style, to satisfy actual service requirements.By cooperating of gas port 5 and air guide stopple 6, make present embodiment to arrange gas channel voluntarily, so that lead cigarette in the stove by the actual direction of vacuum take-off.Can utilize simultaneously the suction force of vacuum pump group to greatest extent, satisfy the demand of advancing pump fast.And be convenient to on-the-spot actual replacing, there is bigger benefit in the life-span of improving present embodiment.
As shown in Figure 4, the section on present embodiment housing top is " ladder type ", adopts full weld to connect mode and makes.It has increased the processing space, has also reduced the bonding phenomenon of splashing of cold slag, and in the work-ing life that helps improving present embodiment, the while also helps the layout of gas port 5.
As shown in Figure 7, present embodiment adopts the anti-equipment structure form of steel skeleton composite corindon matter mould material.Its skeleton 8 is the reinforcement steel plate of 8mm thickness, and outer side some anchoring pieces of anti-material the 10 of spot welding all in steel plate frame 8 are used for the fixing of anti-material and strengthen connecting.Simultaneously, on steel plate frame 8, open some louvres 9, so that anti-material when baking is diathermanous, to improve anti-material work-ing life.
As shown in Figure 8, the housing of present embodiment all carries out the cast (being different from traditional single face cast) of corundum pouring material 11, the stability and the refractoriness of guaranteeing to pour into a mould the anti-material in back simultaneously by certain baking system in steel plate frame 8 inside and outside both sides.Because skeleton 8 is compound in the conductive force of anti-material middle part and louvre 9, makes anti-material be heated evenly, and has eliminated the disadvantage that anti-material of the anti-material formula of traditional single face bell and box hat are heated inhomogeneous easy explosion, peel off, one-piece construction is strengthened.Solve anti-material because of being subjected to long-time temperatures involved, damaged serious problem, guaranteed security, the reliability of operation, more increased the work-ing life of screening cover.
The manufacturing processed of present embodiment is as follows:
Novel described VOD inner shield is covered behind single piece part casting complete for this structure, adopts natural Health preservation 24 hours, toasts 6 hours with the little fire that is lower than 400 ℃ then, so that mould material bonds and increases its refractoriness, the baking curve as shown in Figure 9.
Toast after 6 hours, the naturally cooling of anti-the material carries out the casting quality inspection after cooling, can assemble use after qualified.Other it should be noted that its steel skeleton can keep after present embodiment is changed, and can repeat cast after louvre, the anchoring piece of anti-the material are repaired.Can reduce the material manufacturing cost thus, save human and material resources, realize resource regeneration, and help environmental protection.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (8)
1. a vacuum oxygen decarburization ladle furnace use inner shield is covered, and its housing top has thermometric thief hole (1), oxygen rifle hole (2), and charge cavity (3) and vision slit (4) is characterized in that also comprising: some gas ports (5), along circumferentially being located at lower housing portion; Some air guide stopples (6) are tightly connected with gas port (5).
2. vacuum oxygen decarburization ladle furnace use inner shield lid as claimed in claim 1 is characterized in that: be equipped with tapering on described gas port (5) and the air guide stopple (6), and the opening of gas port (5) is outer little interior big.
3. vacuum oxygen decarburization ladle furnace use inner shield lid as claimed in claim 2, it is characterized in that: the material of described air guide stopple (6) is a corundum pouring material, is provided with a stiffening web (7) in it.
4. as any described vacuum oxygen decarburization ladle furnace use inner shield lid of claim 1-3, it is characterized in that: the section on described housing top is trapezoidal.
5. vacuum oxygen decarburization ladle furnace use inner shield lid as claimed in claim 4, it is characterized in that: described housing comprises a skeleton (8), the interior outer side top-pour of skeleton (8) is marked with anti-material.
6. vacuum oxygen decarburization ladle furnace use inner shield lid as claimed in claim 5, it is characterized in that: described anti-material is corundum pouring material (11), skeleton (8) is for strengthening steel plate.
7. vacuum oxygen decarburization ladle furnace use inner shield lid as claimed in claim 6, it is characterized in that: the interior outer side of described skeleton (8) is provided with some anchoring pieces of anti-material the (10).
8. vacuum oxygen decarburization ladle furnace use inner shield lid as claimed in claim 7 is characterized in that: also be provided with some louvres (9) on the described skeleton (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200668582U CN201347440Y (en) | 2009-01-14 | 2009-01-14 | Inner shielding cover for vacuum oxygen decarbonization ladle furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200668582U CN201347440Y (en) | 2009-01-14 | 2009-01-14 | Inner shielding cover for vacuum oxygen decarbonization ladle furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201347440Y true CN201347440Y (en) | 2009-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200668582U Expired - Fee Related CN201347440Y (en) | 2009-01-14 | 2009-01-14 | Inner shielding cover for vacuum oxygen decarbonization ladle furnace |
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| CN (1) | CN201347440Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864510A (en) * | 2010-06-12 | 2010-10-20 | 上海宝钢铸造有限公司 | Nodular cast iron type finery shielding cover |
| CN102643956A (en) * | 2012-03-28 | 2012-08-22 | 芜湖新兴铸管有限责任公司 | VD (Vacuum Degassing) vacuum furnace shielding cover |
| CN102719623A (en) * | 2012-05-31 | 2012-10-10 | 中信重工机械股份有限公司 | Slag stopping disk used for VD (vacuum degassing) /VOD (vacuum oxygen decarburization) furnace |
| CN102747195A (en) * | 2012-07-04 | 2012-10-24 | 莱芜钢铁集团有限公司 | Protective device for sealing ring of VD furnace vacuum tank |
| CN108411069A (en) * | 2018-04-28 | 2018-08-17 | 共享铸钢有限公司 | A kind of VOD stoves water cooling leak automatic alarm control system and control method |
-
2009
- 2009-01-14 CN CNU2009200668582U patent/CN201347440Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864510A (en) * | 2010-06-12 | 2010-10-20 | 上海宝钢铸造有限公司 | Nodular cast iron type finery shielding cover |
| CN102643956A (en) * | 2012-03-28 | 2012-08-22 | 芜湖新兴铸管有限责任公司 | VD (Vacuum Degassing) vacuum furnace shielding cover |
| CN102719623A (en) * | 2012-05-31 | 2012-10-10 | 中信重工机械股份有限公司 | Slag stopping disk used for VD (vacuum degassing) /VOD (vacuum oxygen decarburization) furnace |
| CN102747195A (en) * | 2012-07-04 | 2012-10-24 | 莱芜钢铁集团有限公司 | Protective device for sealing ring of VD furnace vacuum tank |
| CN102747195B (en) * | 2012-07-04 | 2013-12-18 | 莱芜钢铁集团有限公司 | Protective device for sealing ring of VD furnace vacuum tank |
| CN108411069A (en) * | 2018-04-28 | 2018-08-17 | 共享铸钢有限公司 | A kind of VOD stoves water cooling leak automatic alarm control system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20160114 |