CN102954693B - 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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- CN102954693B CN102954693B CN201110240797.9A CN201110240797A CN102954693B CN 102954693 B CN102954693 B CN 102954693B CN 201110240797 A CN201110240797 A CN 201110240797A CN 102954693 B CN102954693 B CN 102954693B
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- circulating pipe
- base channel
- brick
- bottom groove
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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
- 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
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 229910000976 Electrical steel Inorganic materials 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
- 230000007423 decrease 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 silicon steel proportion increasing, the ratio of automobile slab also rises appreciably.Under this steel grade structure, molten steel to 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 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 to 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 base channel life cycle is: circulation pipe brick cannot be changed separately and build by laying bricks or stones, go up, lower floor's circulation pipe brick is all assembled in advance to paste according to preliminary dimension and is integrated, before base channel liner is not yet built by laying bricks or stones, first with crane, the lower floor's circulation pipe brick gluing is put into the steel plate being preset in below base channel flange from base channel top, 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 complete, carry out just now the inside lining building construction of base channel, and once the inside lining building of base channel completes, the circulation pipe brick being integrated is pasted in assembling in advance just again cannot send circulation pipe brick by hanging in base channel downwards, therefore circulation pipe brick also just cannot be changed separately and build by laying bricks or stones, can only change together with base channel and build by laying bricks or stones, thereby when circulation pipe brick is etched after the degree that cannot continue to use, even if the situation of base channel is good again, also must change together 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, the service life of base channel will directly be affected, shortened the life cycle of base channel.
Summary of the invention
Object of the present invention aims to provide a kind of integral body separately and builds replacing circulation pipe by laying bricks or stones, realize circulation pipe and mate use with other positions, thereby the life cycle that extends circulation pipe and base channel, reduces costs expense, 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 building method for vacuum degassing furnace base channel circulation pipe, its concrete operation method and step are:
(1), utensil preparation:
A, with 10mm steel plate processing Yi Ge center annular supporting plate with holes, supporting plate external diameter is identical with 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 use 15mm steel plate processing, 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 base channel flange lower surface by 4 fixed cards, and use gad wedging;
(3), masonry technology requires:
A, first build lower floor's circulation pipe brick by laying bricks or stones, circulation pipe brick is placed directly in to splint upper surface, adopt laid dry, brickwork joint is less than 1mm, and between circulation pipe brick and circulation pipe inwall, leaves the seam that stays of 30-50mm;
B, lower floor's circulation pipe brick complete after, to staying, in seam, fill castable refractory;
After c, health 4h, then build upper strata circulation pipe brick by laying bricks or stones, adopt equally laid dry, brickwork joint is less than 1mm, between circulation pipe brick and circulation pipe inwall, leave the seam that stays of 30-50mm, and upper and lower two-layer brickwork joint alignment is not staggered, the clearance control between two-layer circulation pipe brick is below 0.5mm;
D, upper strata circulation pipe brick complete after, with castable refractory, will stay seam to fill full;
E, with castable refractory by the bottom working lining levelling of circulation pipe brick upper surface and base channel.
(4), placingJi Shu requires:
A, castable water employing water temperature are the clean tap water of 4-15 ℃;
B, according to castable consumption, add and throw required siccative, be first dry mixed 1min, then add water wet mixing 2 min, in castable siccative, amount of water is controlled at 4.5-5% by weight;
After c, winter construction, take Insulation, keep environment temperature more than 5 ℃, and demould time is no less than 36h;
D, the castable adding after water stirs are finished using in 1 h, and cast must not be interrupted construction midway;
When e, vibration, vibrating head is answered straight cutting, inserts soon, is pulled out slowly, 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, after construction, natural curing 12h is above and confirm after sclerosis completely can the demoulding, proper extension natural curing time when environment temperature is on the low side;
B, be dried baking after building complete 48 h by laying bricks or stones.
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 are especially matched the service life of base channel, reach the standard of simultaneously scrapping, thereby eliminate because circulation pipe corrodes the base channel seriously causing and together remove the drawback of again building by laying bricks or stones, increase substantially the life-span of base channel, extend the life cycle of base channel, make the life-span of base channel improve nearly one times, 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.
Accompanying drawing explanation
Fig. 1 is supporting plate shape schematic diagram.
Fig. 2 is fixed card shape schematic diagram.
In figure: supporting plate 1, fixed card 2.
The specific embodiment
The concrete implementation and operation method of building method and the step of RH base channel circulation pipe of the present invention are:
1, utensil preparation:
A, use 10mm steel plate processing Yi Ge center annular supporting plate 1 with holes, according to base channel flange outer diameter size, supporting plate 1 external diameter mates with base channel flange outer diameter, 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, in the inboard of supporting plate 1, reserves liner tile, circulating pipe and stays the position of seam.
B, 4 " U " shape fixed cards 2 of use 15mm steel plate processing, fixed card 2 A/Fs are * * mm to be slightly larger than flange and to 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 use are snapped on base channel flange lower surface, and use gad wedging.
3, build by laying bricks or stones:
A, first build lower floor's circulation pipe brick by laying bricks or stones: adopt magnesite-chrome brick to build by laying bricks or stones, the magnesite-chrome brick without any defect is placed directly in to the inboard upper surface of supporting plate 1, between circulation pipe brick and circulation pipe inwall, leave the seam that stays of 40mm, along circulation pipe inwall, be built into a circle.Adopt laid dry mode, adjacent two magnesite-chrome brick brickwork joints are 0.8mm.
B, lower floor's circulation pipe brick complete after, to staying, in seam, fill castable refractory and fully vibrate and tamp; 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, and upper and lower two-layer brickwork joint alignment is staggered between magnesite-chrome brick and circulation pipe inwall, and the clearance control between two-layer magnesite-chrome brick is at 0.4mm.
D, upper strata circulation pipe brick complete after, with castable refractory, will stay seam to fill up tamping.
E, with castable refractory by the bottom working lining levelling of 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, according to castable consumption, add and throw required siccative, be first dry mixed 1min, then add water wet mixing 2 min, in castable siccative, amount of water is controlled at 5% by weight, guarantees that the castable mixing has good mobility.
If c winter construction, should take corresponding Insulation, keep environment temperature more than 5 ℃, and guarantee that demould time is greater than 36h.
D, the castable adding 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 in 200 mm left and right, and each vibrating time generally, in 30s left and right, is returned and starched as being advisable with material surface; While extracting vibrating head, answer slow and steady, 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 watering; Under 25 ℃ of environment temperatures, natural curing 12h after construction, and confirm after sclerosis completely can the demoulding, answers the proper extension natural curing time when environment temperature is on the low side.
B, just can be dried baking after building complete 48 h by laying bricks or stones.
Claims (1)
1. a building method for vacuum degassing furnace base channel circulation pipe, is characterized in that, concrete grammar and step are:
(1), utensil preparation:
A, with 10mm steel plate processing Yi Ge center annular supporting plate with holes, supporting plate external diameter is identical with 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 use 15mm steel plate processing, 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 base channel flange lower surface by 4 fixed cards, and use gad wedging;
(3), masonry technology requires:
A, first build lower floor's circulation pipe brick by laying bricks or stones, circulation pipe brick is placed directly in to splint upper surface, adopt laid dry, brickwork joint is less than 1mm, and between circulation pipe brick and circulation pipe inwall, leaves the seam that stays of 30-50mm;
B, lower floor's circulation pipe brick complete after, to staying, in seam, fill castable refractory;
After c, health 4h, then build upper strata circulation pipe brick by laying bricks or stones, adopt equally laid dry, brickwork joint is less than 1mm, between circulation pipe brick and circulation pipe inwall, leave the seam that stays of 30-50mm, and upper and lower two-layer brickwork joint alignment is not staggered, the clearance control between two-layer circulation pipe brick is below 0.5mm;
D, upper strata circulation pipe brick complete after, with castable refractory, will stay seam to fill full;
E, with castable refractory by the bottom working lining levelling of circulation pipe brick upper surface and base channel;
(4), placingJi Shu requires:
A, castable refractory water employing water temperature are the clean tap water of 4-15 ℃;
B, according to castable refractory consumption, add and throw required siccative, be first dry mixed 1min, then add water wet mixing 2min, in castable refractory siccative, amount of water is controlled at 4.5-5% by weight;
After c, winter construction, take Insulation, keep environment temperature more than 5 ℃, and demould time is no less than 36h;
D, the castable refractory adding after water stirs are finished using in 1h, and cast must not be interrupted construction midway;
When e, vibration, vibrating head is answered straight cutting, inserts soon, is pulled out slowly, insertion depth >=100mm, and twice vibrating head plunger spacing is between 180-400mm, 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, after construction, natural curing 12h is above and confirm after sclerosis completely can the demoulding, proper extension natural curing time when environment temperature is on the low side;
B, be dried baking after building complete 48h by laying bricks or stones.
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 |
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| 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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| CN102954693B true CN102954693B (en) | 2014-04-02 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| CN107254565B (en) * | 2017-07-19 | 2021-12-03 | 武汉精鼎科技股份有限公司 | Top overturning construction method of RH refining furnace |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| 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 |
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2011
- 2011-08-20 CN CN201110240797.9A patent/CN102954693B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平6-88118A 1994.03.29 |
| JP特许第3673961号B2 2005.07.20 |
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