CN102206722B - Quick repair method for fallen hot air pipeline refractory - Google Patents
Quick repair method for fallen hot air pipeline refractory Download PDFInfo
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- CN102206722B CN102206722B CN201110120966A CN201110120966A CN102206722B CN 102206722 B CN102206722 B CN 102206722B CN 201110120966 A CN201110120966 A CN 201110120966A CN 201110120966 A CN201110120966 A CN 201110120966A CN 102206722 B CN102206722 B CN 102206722B
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Abstract
The invention relates to a quick repair method for a fallen hot air pipeline refractory. The method comprises the following steps of: using a mold and selecting a casting material, namely selecting a high-aluminum quick-drying casting material as the casting material, and matching the mold with a reinforced structure; manually tamping the casting material, and fully drying a cast body by using the temperature of a pipeline and an original masonry in the casting process; standing for 2 hours until the outer surface of the cast body is dried, laying refractory fibers on the outer surface of the cast body, welding a shell on the outer ring of the cast body, keeping a gap of 30-50mm between the casting material and a steel shell of the mold, and opening mudjacking holes on the shell for mudjacking; and supplying air to a blast furnace. Under the condition of ensuring the original material strength, the operating procedures are simplified. The construction time is equivalent to pipeline packing time, and the quality can reach or exceed the same level of a re-built refractory.
Description
Technical field
The invention belongs to the maintaining blast furnace field, particularly relate to the fast repairing method that the anti-material of a kind of hot air duct comes off.
Background technology
Air supply duct is being born the task of carrying high temperature air to blast furnace in blast furnace system; The operation operating mode is more abominable; Owing to some reasons in design, anti-unit construction and actual production are used, hot air duct is prone to the accident that the shell cracking leaks out and the anti-material of pipeline comes off, and it is bigger to the influence of blast furnace production to handle the hot air duct accident in process of production; Gently then cause the urgent damping down of blast furnace; Cause the not normal or even cool accident of stove of conditions of blast furnace, can tend to follow the generation security incident when serious, the personnel that cause injure or structure deteriorate.
The quick reparation that how the anti-material of hot air duct is come off is a difficult problem always, and the method for usually conduct is that quick online packing is handled at damaged position, can resume production at short notice like this, reduces production loss; But online packing can only be dealt with problems at short notice, corrodes in the aggravation of high temperature, the distinguished and admirable impact of the high speed refractory materials around can causing, thereby can cause the come off further expansion in zone of anti-material, often need repeat packing, strengthens the difficulty of post-processed.To fundamentally handle then and need build by laying bricks or stones again, but need the long damping down of blast furnace like this, lose huge the anti-material of damaged part.
We attempt adopting the method that the damaged position of anti-material cast-in-site is handled, but prerequisite is to handle the problem of two aspects well:
1, how to guarantee that pour mass does not ftracture: mould material must add could form flowability after water stirs; Guarantee inner stopping property; Mould material contacts with the anti-material of pyritous during cast-in-site; A large amount of water vapors pressure that produces of from pour mass, overflowing can cause pour mass that cracking and a large amount of internal air gap take place, and causes the stopping property and the intensity variation of pour mass; This is a primary difficult problem that solves.
2, the making of mould and installation question: the crux of cast-in-site success or not is the making and the installation question of mould; The hot properties of pipe interior makes makes and is mounted for a difficult problem; The wooden die that common anti-unit construction uses is infeasible, and adopts steel die can't guarantee the fixing and installation dimension precision of mould.Have only Mold Making be in place mould material could guarantee sealing and be shaped, with the combining closely of the former masonry of anti-the material.
3, how to coordinate the intensity and the low heat conductivity of pour mass, and with the bonding properties of the former masonry of anti-the material: the intensity of pour mass and the bonding properties of the former masonry of anti-the material at first will guarantee, therefore the selection of mould material are had higher requirement.
Summary of the invention
Technical problem to be solved by this invention provides the fast repairing method that the anti-material of a kind of hot air duct comes off, and how to guarantee that pour mass does not ftracture, guarantees the fixing and installation dimension precision of mould simultaneously.
The technical solution adopted for the present invention to solve the technical problems is: a kind of hot air duct fast repairing method that anti-material comes off is provided, comprises,
1) elder generation comes off to anti-material, and breakage has appearred in the zone and loosening anti-material is cleared up;
2) select for use high alumina to do mould material soon, and in the dried soon mould material of high alumina, add anti-explosion filaments;
3) select for use the steel plate of 20mm to make mould, mould adopts split type and stiffening web fixed mode;
4) the more anti-material of segmental arc size of Mold Making come off the zone big by 1/3, mould laterally disintegrates;
5) beginning installation mold, single only installation is one by one fixed with stiffening web and conduit enclosure behind every mould installation in position during installation, and next mould is installed again, on mold outer surface, welds the steel anchoring piece after the mould installation;
6) scene begins to pour into a mould the dried soon mould material of high alumina, and the stirring amount of water is 2.5-3.0%;
7) manual work is carried out tamping to mould material, in casting process, utilizes the temperature of pipeline and former masonry that pour mass is carried out sufficient drying simultaneously;
8) leave standstill 2 hours external surface dryings to be cast behind the casting complete, apply refractory fibre at the pour mass outside surface, loops welded shell outside pour mass keeps the space of 30-50mm, and on shell, opens the mud jacking hole and carry out mud jacking between mould material and mould steel shell;
9) mud jacking finishes the blast furnace air-supply.
Described grouting material adopts light heat-insulating mud, and the wedding agent of mud is selected non-water system wedding agent for use.
Beneficial effect
Engineering time of the present invention is suitable with the pipeline packing, and quality can meet or exceed and build the peer-level of anti-the material again by laying bricks or stones.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
The fast repairing method that the anti-material of a kind of hot air duct comes off comprises,
1) elder generation comes off to anti-material, and breakage has appearred in the zone and loosening anti-material is cleared up;
2) select for use high alumina to do mould material soon, and in the dried soon mould material of high alumina, add anti-explosion filaments;
3) select for use the steel plate of 20mm to make mould, mould adopts split type and stiffening web fixed mode;
4) the more anti-material of segmental arc size of Mold Making come off the zone big by 1/3, mould laterally disintegrates;
5) beginning installation mold, single only installation is one by one fixed with stiffening web and conduit enclosure behind every mould installation in position during installation, and next mould is installed again, on mold outer surface, welds the steel anchoring piece after the mould installation;
6) scene begins to pour into a mould the dried soon mould material of high alumina, and the stirring amount of water is 2.5-3.0%;
7) manual work is carried out tamping to mould material, in casting process, utilizes the temperature of pipeline and former masonry that pour mass is carried out sufficient drying simultaneously;
8) leave standstill 2 hours external surface dryings to be cast behind the casting complete, apply refractory fibre at the pour mass outside surface, loops welded shell outside pour mass keeps the space of 30-50mm, and on shell, opens the mud jacking hole and carry out mud jacking between mould material and mould steel shell;
9) mud jacking finishes the blast furnace air-supply.
Described grouting material adopts light heat-insulating mud, and the wedding agent of mud is selected non-water system wedding agent for use.
Claims (2)
1. the fast repairing method that the anti-material of hot air duct comes off is characterized in that, comprise the following steps,
1) elder generation comes off to anti-material, and breakage has appearred in the zone and loosening anti-material is cleared up;
2) select for use high alumina to do mould material soon, and in the dried soon mould material of high alumina, add anti-explosion filaments;
3) select for use the steel plate of 20mm to make mould, mould adopts split type and stiffening web fixed mode;
4) the more anti-material of segmental arc size of Mold Making come off the zone big by 1/3, mould laterally disintegrates;
5) beginning installation mold, single only installation is one by one fixed with stiffening web and conduit enclosure behind every mould installation in position during installation, and next mould is installed again, on mold outer surface, welds the steel anchoring piece after the mould installation;
6) scene begins to pour into a mould the dried soon mould material of high alumina, and the stirring amount of water is 2.5-3.0%;
7) manual work is carried out tamping to mould material, in casting process, utilizes the temperature of pipeline and former masonry that pour mass is carried out sufficient drying simultaneously;
8) leave standstill 2 hours external surface dryings to be cast behind the casting complete, apply refractory fibre at the pour mass outside surface, loops welded shell outside pour mass keeps the space of 30-50mm, and on shell, opens the mud jacking hole and carry out mud jacking between mould material and mould steel shell;
9) mud jacking finishes the blast furnace air-supply.
2. the fast repairing method that the anti-material of a kind of hot air duct according to claim 1 comes off is characterized in that: grouting material adopts light heat-insulating mud, and the wedding agent of mud is selected non-water system wedding agent for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110120966A CN102206722B (en) | 2011-05-11 | 2011-05-11 | Quick repair method for fallen hot air pipeline refractory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110120966A CN102206722B (en) | 2011-05-11 | 2011-05-11 | Quick repair method for fallen hot air pipeline refractory |
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| Publication Number | Publication Date |
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| CN102206722A CN102206722A (en) | 2011-10-05 |
| CN102206722B true CN102206722B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110120966A Expired - Fee Related CN102206722B (en) | 2011-05-11 | 2011-05-11 | Quick repair method for fallen hot air pipeline refractory |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102424872A (en) * | 2011-12-01 | 2012-04-25 | 天津钢铁集团有限公司 | Method for patching damaged blast furnace hot air pipeline inner liner in hot state |
| CN103276130B (en) * | 2013-05-29 | 2015-10-28 | 新兴铸管股份有限公司 | Maintenance method for air leakage from pipeline of hot-air system of blast furnace |
| CN103898263B (en) * | 2014-01-28 | 2016-05-04 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Hot air duct premixer refractory brick come off quick prosthetic appliance and method |
| CN104154755A (en) * | 2014-08-08 | 2014-11-19 | 山西太钢不锈钢股份有限公司 | Thermal insulation construction method in hot gas pipelines |
| CN105003788A (en) * | 2015-06-12 | 2015-10-28 | 江苏永钢集团有限公司 | Repair method for burnt-red and air-leakage part of pipeline |
| CN105018664B (en) * | 2015-08-13 | 2017-06-16 | 广东韶钢松山股份有限公司 | A kind of blast funnace hot blast stove pipeline technique for rapidly repairing |
| CN108570524B (en) * | 2017-03-08 | 2020-04-24 | 广东韶钢松山股份有限公司 | Detection and diagnosis process for refractory material of blast furnace hot blast stove pipeline lining |
| CN109576425A (en) * | 2017-09-29 | 2019-04-05 | 上海宝钢工业技术服务有限公司 | The rubescent processing method of blast furnace gooseneck position shell high temperature |
| CN110643773A (en) * | 2018-09-15 | 2020-01-03 | 广东韶钢松山股份有限公司 | Blast furnace hot blast branch pipe port refractory repair method |
| CN111349735B (en) * | 2018-12-21 | 2023-07-04 | 新疆八一钢铁股份有限公司 | Treatment method for air leakage and redness of air mixing three-way pipeline of blast furnace hot blast stove |
| CN109735675B (en) * | 2019-01-28 | 2020-09-11 | 五冶集团上海有限公司 | Method for quickly overhauling refractory lining of blast furnace hot air main pipe |
| CN115044733A (en) * | 2022-07-13 | 2022-09-13 | 重庆钢铁股份有限公司 | Method for repairing converter cap notch |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1208474C (en) * | 2002-09-28 | 2005-06-29 | 宝山钢铁股份有限公司 | Thermal state method for restoring branch pipe orifice of blast furnace bustle pipe |
| CN201158674Y (en) * | 2007-11-13 | 2008-12-03 | 上海宝钢设备检修有限公司 | Renovation spray coating device for inner wall of blast furnace hot wind short tube |
| CN101899545B (en) * | 2009-05-27 | 2012-08-15 | 五冶集团上海有限公司 | On-line changing method of hot blast main duct of blast furnace |
| CN101760576B (en) * | 2010-02-26 | 2011-08-17 | 河北省首钢迁安钢铁有限责任公司 | Repatching method for top liner of blast furnace hot-wind pipeline |
| CN102032788B (en) * | 2010-12-13 | 2012-09-05 | 山西太钢不锈钢股份有限公司 | Furnace top repairing method for heating furnace |
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