CN102954693A - Building method of bottom groove circulating pipe of vacuum circulating degassing furnace - Google Patents
Building method of bottom groove circulating pipe of vacuum circulating degassing furnace Download PDFInfo
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- CN102954693A CN102954693A CN2011102407979A CN201110240797A CN102954693A CN 102954693 A CN102954693 A CN 102954693A CN 2011102407979 A CN2011102407979 A CN 2011102407979A CN 201110240797 A CN201110240797 A CN 201110240797A CN 102954693 A CN102954693 A CN 102954693A
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- circulation pipe
- circulating pipe
- base channel
- brick
- castable
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000007872 degassing Methods 0.000 title 1
- 239000011449 brick Substances 0.000 claims abstract description 71
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000009849 vacuum degassing Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 208000034189 Sclerosis Diseases 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention provides a building method of a bottom groove circulating pipe of a vacuum circulating degasser, which is characterized in that a manufactured supporting plate is clamped on the lower surface of a flange of a bottom groove by a fixing clamp, dry building is adopted, a lower layer of circulating pipe bricks are built firstly, then an upper layer of circulating pipe bricks are built, the brick joint is smaller than 1mm, the gap between the two layers of bricks is controlled to be less than 0.5mm, a 30-50mm remained joint is left between the circulating pipe bricks and the inner wall of the circulating pipe, the remained joint is filled with a refractory castable, the pouring is fully vibrated and tamped, demoulding can be carried out after natural curing for more than 12 hours, the demoulding is carried out after natural curing for 12 hours, and dry baking. The invention can realize the independent building and replacement of the circulating pipe, eliminate the defect of dismantling and rebuilding the bottom groove caused by serious corrosion of the circulating pipe, greatly improve the service life of the bottom groove, prolong the service cycle of the bottom groove by nearly one time, effectively relieve the preparation pressure of the vacuum chamber, reduce the production cost and improve the RH productivity.
Description
Technical field
The invention belongs to steelmaking equipment renovation technique field, relate in particular to the building method of a kind of vacuum degassing furnace (being called for short RH) base channel circulation pipe brick.
Background technology
Along with the rapid raising of the continuous increase of output of steel, particularly silicon steel output, make the silicon steel proportion increasing, the ratio of automobile slab also rises appreciably.Under this steel grade structure, molten steel to the RH base channel particularly the washing away of circulation pipe, corrode and be on the rise, the erosion rate of circulation pipe brick has been brought up to the 0.8mm/ tank by every tank 0.5mm/ tank, obviously reduced the service life of circulation pipe brick, directly affected the service life of base channel, shorten the life cycle of base channel, and brought series of problems for the turnover of vacuum chamber, seriously limited the performance of RH production capacity.
The reason that causes circulation pipe brick erosion degree directly to affect the base channel life cycle is: the circulation pipe brick can't be changed separately and build by laying bricks or stones, namely go up, lower floor's circulation pipe brick is all assembled in advance to paste according to preliminary dimension and is integrated, before the base channel liner is not yet built by laying bricks or stones, with crane lower floor's circulation pipe brick of gluing is put on the steel plate that is preset in below the base channel flange from the base channel top first, again upper strata circulation pipe brick is hung onto on lower floor's circulation pipe brick, after the operations such as pipe cast to be recycled are finished, carry out just now the inside lining building construction of base channel, in case and the inside lining building of base channel is finished, the circulation pipe brick that is integrated is pasted in advance assembling just again can't send the circulation pipe brick by hanging in the base channel downwards, therefore the circulation pipe brick also just can't be changed separately and be built by laying bricks or stones, can only change and build by laying bricks or stones with base channel, thereby after being etched the degree that can't continue to use when the circulation pipe brick, even the situation of base channel is good again, also must change with circulation pipe, and together former liner etc. is disposed, again by first circulation pipe brick, the order of building by laying bricks or stones of rear inner lining re-starts the construction of circulation pipe and base channel, so after reducing the service life of circulation pipe brick, to directly affect the service life of base channel, shortened the life cycle of base channel.
Summary of the invention
Purpose of the present invention aims to provide a kind of separately integral body and builds the replacing circulation pipe by laying bricks or stones, realize the coupling use of circulation pipe and other positions, thereby prolong the life cycle of circulation pipe and base channel, reduce cost, improve the building method of the vacuum degassing furnace base channel circulation pipe of RH production capacity.
For this reason, solution of the present invention is:
A kind of building method of vacuum degassing furnace base channel circulation pipe, its concrete operation method and step are:
(1), utensil preparation:
A, with annular supporting plate that the center is with holes of 10mm steel plate processing, the supporting plate external diameter is identical with the base channel flange outer diameter, and the difference of external diameter and internal diameter is slightly larger than liner tile and adds circulating pipe thickness sum;
B, 4 " U " shape fixed cards of usefulness 15mm steel plate processing, the fixed card A/F is slightly larger than flange and adds supporting plate thickness sum;
(2), build preparation by laying bricks or stones:
Base channel flange and circulation pipe inner wall cleaning is clean; Supporting plate is snapped on the base channel flange lower surface with 4 fixed cards, and use the gad wedging;
(3), masonry technology requires:
A, build lower floor's circulation pipe brick by laying bricks or stones first, the circulation pipe brick is placed directly in splint upper surface, adopt laid dry, brickwork joint is less than 1mm, and leaves the seam that stays of 30-50mm between circulation pipe brick and circulation pipe inwall;
B, lower floor's circulation pipe brick complete after, fill castable refractory in the seam to staying;
Behind c, the health 4h, build again upper strata circulation pipe brick by laying bricks or stones, adopt equally laid dry, brickwork joint is less than 1mm, leave the seam that stays of 30-50mm between circulation pipe brick and circulation pipe inwall, and two-layer brickwork joint alignment is not staggered up and down, the clearance control between the two-layer circulation pipe brick is below 0.5mm;
D, upper strata circulation pipe brick complete after, it is full to stay seam to fill with castable refractory;
E, with the bottom working lining levelling of castable refractory with circulation pipe brick upper surface and base channel.
(4), placingJi Shu requires:
A, castable water employing water temperature are 4-15 ℃ clean tap water;
B, add according to the castable consumption and to throw required siccative, be dry mixed first 1min, add water wet mixing 2 min again, amount of water is controlled at 4.5-5% in the castable siccative by weight;
After c, the winter construction, take Insulation, keep environment temperature more than 5 ℃, and demould time is no less than 36h;
D, the castable that adds after water stirs are finished using in 1 h, and cast must not be interrupted construction midway;
Vibrating head is answered straight cutting, inserts soon, is pulled out slowly when e, vibration, insertion depth 〉=100mm, and twice vibrating head plunger spacing is between 180-400 mm, and each vibrating time is returned slurry with material surface and is as the criterion;
(5), demoulding health promotion technology requires:
A, under 25 ℃ of environment temperatures, natural curing 12h is above and confirm after the fully sclerosis can the demoulding, proper extension natural curing time when environment temperature is on the low side after the construction;
B, build by laying bricks or stones and carry out the drying baking behind complete 48 h.
Good effect of the present invention is:
Adopt the building method of the present invention's RH base channel circulation pipe, can realize building by laying bricks or stones separately and integral replacing of base channel rising circulation pipe or decline circulation pipe, circulation pipe and other positions especially are complementary the service life of base channel, reach the standard of scrapping simultaneously, thereby eliminate because circulation pipe corrodes the base channel that seriously causes and together remove the drawback of again building by laying bricks or stones, increase substantially the life-span of base channel, prolong the life cycle of base channel, make nearly one times of the Service life of base channel, relatively reduce the situation of base channel abnormal off-line, effectively alleviate the pressure of reorganizing and outfit of vacuum chamber, reduce spare unit consumption and maintenance load, greatly save production cost, improve the production capacity of RH.
Description of drawings
Fig. 1 is supporting plate shape schematic diagram.
Fig. 2 is fixed card shape schematic diagram.
Among the figure: supporting plate 1, fixed card 2.
The specific embodiment
Building method implementation method of operating and the step of RH base channel circulation pipe of the present invention are:
1, utensil preparation:
A, annular supporting plate 1 that the center is with holes of usefulness 10mm steel plate processing, according to base channel flange outer diameter size, supporting plate 1 external diameter and base channel flange outer diameter coupling, be 1240mm,, the internal diameter of supporting plate 1 is 560 mm, the interior hole dimension of supporting plate 1 is less than base channel flange internal diameter size, making the external diameter of supporting plate 1 and the difference of internal diameter is 680 mm, is slightly larger than liner tile and adds circulating pipe thickness sum, namely reserves liner tile, circulating pipe in the inboard of supporting plate 1 and stays the position of seam.
B, with 4 " U " shape fixed cards 2 of 15mm steel plate processing, fixed card 2 A/Fs are * * mm, be slightly larger than flange and add supporting plate thickness sum.
2, build preparation by laying bricks or stones:
Base channel flange and circulation pipe inner wall cleaning is clean; 4 fixed cards 2 of supporting plate 1 usefulness are snapped on the base channel flange lower surface, and use the gad wedging.
3, build by laying bricks or stones:
A, build lower floor's circulation pipe brick by laying bricks or stones first: adopt magnesite-chrome brick to build by laying bricks or stones, will be placed directly in without the magnesite-chrome brick of any defective supporting plate 1 inboard upper surface, between circulation pipe brick and circulation pipe inwall, leave the seam that stays of 40mm, follow the endless tube inwall and be built into a circle.Adopt the laid dry mode, adjacent two magnesite-chrome brick brickwork joints are 0.8mm.
B, lower floor's circulation pipe brick complete after, tamp to staying to fill castable refractory in the seam and fully vibrate; Health 4h.
C, build upper strata circulation pipe brick by laying bricks or stones: adopt equally laid dry, brickwork joint 0.8mm leave the seam that stays of 40mm between magnesite-chrome brick and circulation pipe inwall, and two-layer brickwork joint alignment is staggered up and down, and the clearance control between the two-layer magnesite-chrome brick is at 0.4mm.
D, upper strata circulation pipe brick complete after, will stay seam to fill up tamping with castable refractory.
E, with the bottom working lining levelling of castable refractory with circulation pipe brick upper surface and base channel.
4, placingJi Shu requires:
A, castable water adopt clean tap water, and water temperature is between 10-12 ℃.
B, add according to the castable consumption and to throw required siccative, be dry mixed first 1min, add water wet mixing 2 min again, amount of water is controlled at 5% in the castable siccative by weight, guarantees that the castable that mixes has good flowability.
If the c winter construction should be taked corresponding Insulation, keep environment temperature more than 5 ℃, and guarantee that demould time is greater than 36h.
D, the castable that adds after water stirs are finished using in 1 h, and cast must not be interrupted construction midway, and the castable piece after condensing can not add water again and stir use.
When e, vibration, vibrating head is answered straight cutting, inserts soon, is pulled out slowly, and insertion depth reaches 150mm, and twice vibrating head plunger spacing is about 200 mm, and each vibrating time generally about 30s, is returned slurry for being advisable with material surface; Answer slow and steady when extracting vibrating head, prevent from staying excellent hole hole.
5, demoulding health promotion technology requires:
A, be poured after, forbid at any object of pour mass surface coverage, forbid the watering; Under 25 ℃ of environment temperatures, natural curing 12h after the construction, and confirm after the fully sclerosis can the demoulding, answers the proper extension natural curing time when environment temperature is on the low side.
B, build by laying bricks or stones and just can carry out the drying baking behind complete 48 h.
Claims (1)
1. the building method of a vacuum degassing furnace base channel circulation pipe is characterized in that, concrete grammar and step are:
(1), utensil preparation:
A, with annular supporting plate that the center is with holes of 10mm steel plate processing, the supporting plate external diameter is identical with the base channel flange outer diameter, and the difference of external diameter and internal diameter is slightly larger than liner tile and adds circulating pipe thickness sum;
B, 4 " U " shape fixed cards of usefulness 15mm steel plate processing, the fixed card A/F is slightly larger than flange and adds supporting plate thickness sum;
(2), build preparation by laying bricks or stones:
Base channel flange and circulation pipe inner wall cleaning is clean; Supporting plate is snapped on the base channel flange lower surface with 4 fixed cards, and use the gad wedging;
(3), masonry technology requires:
A, build lower floor's circulation pipe brick by laying bricks or stones first, the circulation pipe brick is placed directly in splint upper surface, adopt laid dry, brickwork joint is less than 1mm, and leaves the seam that stays of 30-50mm between circulation pipe brick and circulation pipe inwall;
B, lower floor's circulation pipe brick complete after, fill castable refractory in the seam to staying;
Behind c, the health 4h, build again upper strata circulation pipe brick by laying bricks or stones, adopt equally laid dry, brickwork joint is less than 1mm, leave the seam that stays of 30-50mm between circulation pipe brick and circulation pipe inwall, and two-layer brickwork joint alignment is not staggered up and down, the clearance control between the two-layer circulation pipe brick is below 0.5mm;
D, upper strata circulation pipe brick complete after, it is full to stay seam to fill with castable refractory;
E, with the bottom working lining levelling of castable refractory with circulation pipe brick upper surface and base channel;
(4), placingJi Shu requires:
A, castable water employing water temperature are 4-15 ℃ clean tap water;
B, add according to the castable consumption and to throw required siccative, be dry mixed first 1min, add water wet mixing 2 min again, amount of water is controlled at 4.5-5% in the castable siccative by weight;
After c, the winter construction, take Insulation, keep environment temperature more than 5 ℃, and demould time is no less than 36h;
D, the castable that adds after water stirs are finished using in 1 h, and cast must not be interrupted construction midway;
Vibrating head is answered straight cutting, inserts soon, is pulled out slowly when e, vibration, insertion depth 〉=100mm, and twice vibrating head plunger spacing is between 180-400 mm, and each vibrating time is returned slurry with material surface and is as the criterion;
(5), demoulding health promotion technology requires:
A, under 25 ℃ of environment temperatures, natural curing 12h is above and confirm after the fully sclerosis can the demoulding, proper extension natural curing time when environment temperature is on the low side after the construction;
B, build by laying bricks or stones and carry out the drying baking behind complete 48 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110240797.9A CN102954693B (en) | 2011-08-20 | 2011-08-20 | Building method of bottom groove circulating pipe of vacuum circulating degassing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110240797.9A CN102954693B (en) | 2011-08-20 | 2011-08-20 | Building method of bottom groove circulating pipe of vacuum circulating degassing furnace |
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| CN102954693A true CN102954693A (en) | 2013-03-06 |
| CN102954693B CN102954693B (en) | 2014-04-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107177719A (en) * | 2017-05-19 | 2017-09-19 | 中钢集团耐火材料有限公司 | A kind of quick change method of vacuum refining furnace circulating pipe refractory material |
| CN107254565A (en) * | 2017-07-19 | 2017-10-17 | 武汉精鼎科技股份有限公司 | A kind of RH refining furnaces flip-top construction method |
| CN107779556A (en) * | 2016-08-31 | 2018-03-09 | 鞍钢股份有限公司 | Method for repairing bottom groove of vacuum chamber of RH refining furnace |
| CN110142383A (en) * | 2019-05-24 | 2019-08-20 | 乳源瑶族自治县东阳光高纯新材料有限公司 | A kind of molten aluminum chute |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688118A (en) * | 1992-09-07 | 1994-03-29 | Toshiba Ceramics Co Ltd | Degassing vessel in vacuum degassing device and method for constructing brick therefor |
| JP3673961B2 (en) * | 1998-08-13 | 2005-07-20 | 黒崎播磨株式会社 | Lined structure of vacuum degassing equipment vacuum chamber |
| CN101177724A (en) * | 2007-12-06 | 2008-05-14 | 鞍钢股份有限公司 | Knotting method for vacuum chamber of integral vacuum circulating degassing furnace |
| CN201128745Y (en) * | 2007-11-22 | 2008-10-08 | 宝山钢铁股份有限公司 | Large circulation dip pipe for vacuum degassing device |
| CN101457279A (en) * | 2007-12-12 | 2009-06-17 | 鞍钢股份有限公司 | Method for prolonging service life of RH vacuum furnace bottom groove |
| CN201381342Y (en) * | 2009-03-19 | 2010-01-13 | 宜兴新威利成耐火材料有限公司 | Improve RH stove lower groove |
| CN101892355A (en) * | 2010-06-30 | 2010-11-24 | 浙江金磊高温材料股份有限公司 | RH furnace circulating pipe and building method thereof |
-
2011
- 2011-08-20 CN CN201110240797.9A patent/CN102954693B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0688118A (en) * | 1992-09-07 | 1994-03-29 | Toshiba Ceramics Co Ltd | Degassing vessel in vacuum degassing device and method for constructing brick therefor |
| JP3673961B2 (en) * | 1998-08-13 | 2005-07-20 | 黒崎播磨株式会社 | Lined structure of vacuum degassing equipment vacuum chamber |
| CN201128745Y (en) * | 2007-11-22 | 2008-10-08 | 宝山钢铁股份有限公司 | Large circulation dip pipe for vacuum degassing device |
| CN101177724A (en) * | 2007-12-06 | 2008-05-14 | 鞍钢股份有限公司 | Knotting method for vacuum chamber of integral vacuum circulating degassing furnace |
| CN101457279A (en) * | 2007-12-12 | 2009-06-17 | 鞍钢股份有限公司 | Method for prolonging service life of RH vacuum furnace bottom groove |
| CN201381342Y (en) * | 2009-03-19 | 2010-01-13 | 宜兴新威利成耐火材料有限公司 | Improve RH stove lower groove |
| CN101892355A (en) * | 2010-06-30 | 2010-11-24 | 浙江金磊高温材料股份有限公司 | RH furnace circulating pipe and building method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107779556A (en) * | 2016-08-31 | 2018-03-09 | 鞍钢股份有限公司 | Method for repairing bottom groove of vacuum chamber of RH refining furnace |
| CN107177719A (en) * | 2017-05-19 | 2017-09-19 | 中钢集团耐火材料有限公司 | A kind of quick change method of vacuum refining furnace circulating pipe refractory material |
| CN107177719B (en) * | 2017-05-19 | 2018-11-16 | 中钢集团耐火材料有限公司 | A kind of quick change method of vacuum refining furnace circulating pipe refractory material |
| CN107254565A (en) * | 2017-07-19 | 2017-10-17 | 武汉精鼎科技股份有限公司 | A kind of RH refining furnaces flip-top construction method |
| CN110142383A (en) * | 2019-05-24 | 2019-08-20 | 乳源瑶族自治县东阳光高纯新材料有限公司 | A kind of molten aluminum chute |
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| Publication number | Publication date |
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| CN102954693B (en) | 2014-04-02 |
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