CN103805723A - Rapid blast furnace hot-air pipeline cross section refractory brick dropping repairing equipment and method - Google Patents
Rapid blast furnace hot-air pipeline cross section refractory brick dropping repairing equipment and method Download PDFInfo
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- CN103805723A CN103805723A CN201410041663.8A CN201410041663A CN103805723A CN 103805723 A CN103805723 A CN 103805723A CN 201410041663 A CN201410041663 A CN 201410041663A CN 103805723 A CN103805723 A CN 103805723A
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Abstract
The invention belongs to the technical field of metallurgical equipment, and in particular discloses rapid blast furnace hot-air pipeline cross section refractory brick dropping repairing equipment and method, being applicable to rapid repairing of dropping and damage of refractory bricks inside cross position pipelines of blast furnace hot-air pipelines, hybrid wind tubes, hot-air branch tubes, surrounding tubes and the like under working conditions such as thermal shock. A hybrid wind tube mold consists of a bent tube section mold, a splicing section mold and a main tube hanging mold, wherein a bent tube section is firstly prefabricated and a splicing section is secondly cast, and the bent tube section and the splicing section are integrally welded by using a splicing method, so that the construction difficulty is greatly alleviated, the repairing working period is greatly shortened to be 3-4 days, and furthermore the time for stopping the furnace is shortened and the cost is lowered; anchor rivets are arranged inside the bent tube section mold, the anchor rivets are Y-shaped, and the opening angle is 120 degrees; a plurality of anchor rivets are arranged on the inner side of the bent tube section mold, and the anchor rivets are arranged in a grid-shaped structure. Due to the anchor rivets, a casting material can be firmly fixed, and the casting material is solid and durable after being condensed and formed, so that the service life is greatly prolonged.
Description
Technical field
The invention belongs to technical field of metallurgical equipment, particularly come off quick prosthetic appliance and a method of blast-furnace hot-air pipeline transposition section refractory brick, is applicable to that the masonry under the working conditions such as thermal shock such as crossover location pipe interior refractory brick such as blast-furnace hot-air pipeline and mixing wind tube, hot blast manifold, bustle pipe comes off, damaged quick reparation.
Background technology
As everyone knows, iron-smelting blast furnace hot air duct is that the warm air of blast-furnace smelting conveying after hotblast stove heating is hot blast, for improving efficiency, recent year blast furnace generally adopts the smelting technology of high wind-warm syndrome, high air quantity, high blast, and wherein hot blast main pipe and arm intersect in the use procedure of position and channel bend position internal refractory brick obscission easily occurs.
Current domestic hot air furnace hot air system pipeline refractory materials design is laying fireproof bricks, difference is refractory brick material difference used, hot-air system pipeline exists thermal shock and refractory materials in worst hot case loading softening phenomenon, especially at the position such as branch pipe tee connection, elbow aborning.Once hot-air system goes wrong, the method processing such as it is cooling that generalized case is just taked to be in the milk, shell is mended claying by replacing a damaged part, fetch water in outside, injection process can not be tamped the crack of the high temperature dot masonry of resistance to material or damaged completely, when serious, can cause grouting material to enter pipe interior or air port place, cause serious obstruction to cause whole hot air duct to be scrapped; Shell cuts open claying patching, repairs area and expends greatly a large amount of manpowers, needs shutdown maintenance 20-30 days, after high temperature material complete removal, again builds by laying bricks or stones, and the turnaround is long and cost is high.The outside method of cooling of fetching water, fetches water and can not cover rubescent region completely, can only locally alleviate rubescent phenomenon, can not tackle the problem at its root, and cooling water loss is large simultaneously, can produce a large amount of hot steams and have certain potential safety hazard.
Summary of the invention
The object of the present invention is to provide a kind of keep in repair convenient, maintenance duration blast-furnace hot-air pipeline transposition section refractory brick short, long service life come off quick prosthetic appliance and method.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of blast-furnace hot-air pipeline transposition section refractory brick quick prosthetic appliance that comes off, comprise mixing wind tube road mould, described mixing wind tube road mould is divided into bend loss mould, splice sections mould and supervisor and hangs mould, bend loss both mold ends is connected with mixer selector valve and splice sections by splicing flange respectively, bend loss mould is provided with venting hole, and splice sections mould is provided with grout hole.
In described bend loss mould, be provided with holdfast, holdfast is Y-shaped, and opening angle is 120 °.
Described bend loss mould inner side is provided with multiple holdfasts, and holdfast is matrix pattern structure and arranges.
The multiple venting holes of symmetrical laying on described bend loss mould.
The multiple grout holes that are provided with of symmetrical laying on described splice sections mould.
It is arch that described supervisor hangs mould.
The described blast-furnace hot-air pipeline transposition section refractory brick fast repairing method that comes off, is characterized in that comprising the steps:
A, monitoring temperature
Use infrared thermometer to measure the temperature of hot air duct bend loss, measure case temperature vertex and carry out mark as alarm set point, when the take off data of alarm set point exceedes 300 ℃ continuously, can judge premixer's refractory brick scaling loss, need to arrange blowing out to overhaul;
B, blowing out dismounting
After blowing out, by the mixing wind tube road overall pulling down of hot blast main pipe top;
Material is built in C, preparation
Build material and comprise luminite cement and bauxites aggregate, the granularity of bauxites aggregate is 1～3mm, and luminite cement and bauxites aggregate are prepared and stir by weight 1:3;
D, fabricated pipe bend section
Make bend loss mould according to the original design size in mixing wind tube road, bend loss mould inner side is provided with multiple holdfasts, and holdfast is matrix pattern structure arranges, the multiple venting holes of symmetrical laying on bend loss mould; First block venting hole and build bend loss with stopper, after building condensation of material, remove stopper and bend loss mould, breather valve is installed on venting hole;
E, build splice sections
Hang mould according to original design size installation splice sections mould and the supervisor in mixing wind tube road, supervisor hangs mould and plays and reinforce supporting role and guarantee that splice sections builds smoothly, build and frontly block grout hole with stopper, while building, vibrate with vibrating head, after building outer material side condensation, remove stopper, splice sections mould and supervisor and hang mould;
F, bend loss and splice sections docking
By integral by splicing flange welding to bend loss and splice sections, carry out pressure grouting by grout hole, injection material adopts phosphate mud, grouting pressure≤0.1Mpa, grout hole carries out respectively one by one, and each grout hole grouting time is 1 minute;
G, drying forming
In blast furnace, send cold wind, bend loss and splice sections, after air-dry latter 30 minutes, pass into hot-air seasoning, and 5 ℃ of wind-warm syndrome risings per hour, open the breather valve on venting hole, valve-off when excessive without steam in drying course.
Before building in described step e, block grout hole at splice sections mould and mould material contact site brush kerosene and with stopper.
Beneficial effect of the present invention is:
1, mixing wind tube road mould, described mixing wind tube road mould is divided into bend loss mould, splice sections mould and supervisor and hangs mould, first fabricated pipe bend section is built splice sections again, by splicing flange, the two is integrally welded, significantly reduce difficulty of construction, the reparation duration significantly foreshortens to 3-4 days, and then has shortened blowing out and reduced cost.
2, in described bend loss mould, be provided with holdfast, holdfast is Y-shaped, and opening angle is 120 °.Described bend loss mould inner side is provided with multiple holdfasts, and holdfast is matrix pattern structure and arranges.Holdfast can more firmly be fixed pouring material, firm and durable more after pouring material condensation moulding, and significantly promote work-ing life.
3, the multiple grout holes that are provided with of symmetrical laying on splice sections mould, carry out pressure grouting, have improved the filling degree of compactness of pouring material, improve heat insulation usefulness, meanwhile, the multiple venting holes of symmetrical laying on bend loss mould, when drying forming, discharge excess steam, be convenient to fast shaping and go into operation.
Accompanying drawing explanation
Fig. 1 is existing installation structural representation;
Fig. 2 is blast-furnace hot-air pipeline transposition section refractory brick dropping situations schematic diagram;
Fig. 3 is bend loss pouring structure schematic diagram of the present invention;
Fig. 4 is that bend loss of the present invention is built shaping schematic view;
Fig. 5 is the holdfast schematic diagram of arranging inside bend loss mould of the present invention;
Fig. 6 is anchor structure schematic diagram of the present invention;
Fig. 7 is splice sections inwall mould of the present invention and reinforces hanging mould structure schematic diagram;
Fig. 8 is structural representation of the present invention.
Embodiment
A kind of blast-furnace hot-air pipeline transposition section refractory brick quick prosthetic appliance that comes off, comprise mixing wind tube road mould 1, described mixing wind tube road mould 1 is divided into bend loss mould 2, splice sections mould 3 and supervisor and hangs mould 9, supervisor hangs mould 9 for arch, can play better support effect, bend loss mould 2 two ends are connected with mixer selector valve 8 and splice sections by splicing flange 4 respectively, and bend loss mould 2 is provided with venting hole 5, and splice sections mould 3 is provided with grout hole 6.In bend loss mould 2, be provided with holdfast 7, holdfast 7 is Y-shaped, and opening angle is 120 °.Described bend loss mould 2 inner sides are provided with multiple holdfasts 7, and holdfast 7 is matrix pattern structure and arranges.The multiple venting holes 5 of symmetrical laying on described bend loss mould 2.The multiple grout holes 6 that are provided with of symmetrical laying on described splice sections mould 3.
The concrete use installation steps of prosthetic appliance are as follows:
A, monitoring temperature
Use infrared thermometer to measure the temperature of hot air duct bend loss, measure case temperature vertex and carry out mark as alarm set point, when the take off data of alarm set point exceedes 300 ℃ continuously, can judge premixer's refractory brick scaling loss, need to arrange blowing out to overhaul;
B, blowing out dismounting
After blowing out, by the mixing wind tube road overall pulling down of hot blast main pipe top;
Material is built in C, preparation
Build material and comprise luminite cement and bauxites aggregate, the granularity of bauxites aggregate is 1～3mm, and luminite cement and bauxites aggregate are prepared and stir by weight 1:3;
D, fabricated pipe bend section
Make bend loss mould according to the original design size in mixing wind tube road, bend loss mould inner side is provided with multiple holdfasts, and holdfast is matrix pattern structure arranges, the multiple venting holes of symmetrical laying on bend loss mould; First block venting hole and build bend loss with stopper, after building condensation of material, remove stopper and bend loss mould, breather valve is installed on venting hole;
E, build splice sections
Hang mould according to original design size installation splice sections mould and the supervisor in mixing wind tube road, supervisor hangs mould and plays and reinforce supporting role and guarantee that splice sections builds smoothly, build and frontly block grout hole with stopper, splice sections mould and mould material contact site brush kerosene, while building, vibrate with vibrating head, after building outer material side condensation, remove stopper, splice sections mould and supervisor and hang mould;
F, bend loss and splice sections docking
By integral by splicing flange welding to bend loss and splice sections, carry out pressure grouting by grout hole, injection material adopts phosphate mud, grouting pressure≤0.1Mpa, grout hole carries out respectively one by one, and each grout hole grouting time is 1 minute;
G, drying forming
In blast furnace, send cold wind, bend loss and splice sections, after air-dry latter 30 minutes, pass into hot-air seasoning, and 5 ℃ of wind-warm syndrome risings per hour, open the breather valve on venting hole, valve-off when excessive without steam in drying course.
Embodiment: illustrate as an example of No. 2 blast furnaces of wine steel iron work example.
A, monitoring temperature
Use infrared thermometer to measure pipeline high temperature dot, irregular continuously measured when super many 300 ℃ of high temperature dot, in take off data, elbow temperature has occurred that more than 300 ℃ high temperature while top temperature reaches 633 ℃ continuously, being judged as hot air duct elbow refractory brick according to survey record comes off, cause hot blast standpipe refractory brick in succession loose or dislocation cause pipeline to be subject to high temperature rubescent, arrange blowing out overhaul;
B, blowing out dismounting
After blowing out, by the mixing wind tube road overall pulling down of hot blast main pipe top, the pipeline of removing is surveyed, its refractory brick comes off position with in earlier stage in full accord by the situation of thermometric analysis;
Material is built in C, preparation
Build material and comprise luminite cement and bauxites aggregate, the granularity of bauxites aggregate is 1～3mm, and luminite cement and bauxites aggregate are prepared and stir by weight 1:3;
D, fabricated pipe bend section
Make bend loss mould according to the original design size in mixing wind tube road, bend loss mould inner side is provided with multiple holdfasts, and holdfast is matrix pattern structure arranges, the multiple venting holes of symmetrical laying on bend loss mould; First use stopper, block venting hole and build bend loss, after building condensation of material, remove stopper and bend loss inwall mould, breather valve is installed on venting hole; Hot weather construction bend loss adopts seasoning, and winter construction bend loss adopts hot-air seasoning;
E, build splice sections
Hang mould according to original design size installation splice sections mould and the supervisor in No. 2 blast furnace mixing wind tube roads, before building, block grout hole at splice sections mould and mould material contact site brush kerosene and with stopper, while building, vibrate with vibrating head, after building outer material side condensation, remove stopper and splice sections inwall mould;
F, bend loss and splice sections docking
By integral by splicing flange welding to bend loss and splice sections, carry out pressure grouting by grout hole, injection material adopts phosphate mud, grouting pressure≤0.1Mpa, grout hole carries out respectively one by one, and each grout hole grouting time is 1 minute;
G, drying forming
In blast furnace, send cold wind, bend loss and splice sections, after air-dry latter 30 minutes, pass into hot-air seasoning, open the breather valve on venting hole, valve-off when excessive without steam in drying course.
Mixing wind tube road skin temperature after repairing is monitored 2 days continuously, and top temperature is 126 ℃, reaches heat insulation requirement after reparation.40 hours actual repair used times, 30.95 ten thousand yuan of recondition expenses.All significantly reductions of duration and expense compared with legacy equipment, technique.
Claims (8)
1. the blast-furnace hot-air pipeline transposition section refractory brick quick prosthetic appliance that comes off, it is characterized in that comprising mixing wind tube road mould (1), described mixing wind tube road mould (1) is divided into bend loss mould (2), splice sections mould (3) and supervisor and hangs mould (9), bend loss mould (2) two ends are connected with mixer selector valve (8) and splice sections by splicing flange (4) respectively, bend loss mould (2) is provided with venting hole (5), and splice sections mould (3) is provided with grout hole (6).
2. the blast-furnace hot-air pipeline transposition section refractory brick according to claim 1 quick prosthetic appliance that comes off, is characterized in that being provided with holdfast (7) in described bend loss mould (2), and holdfast (7) is Y-shaped, and opening angle is 120 °.
3. the hot air duct according to claim 2 premixer refractory brick quick prosthetic appliance that comes off, is characterized in that described bend loss mould (2) inner side is provided with multiple holdfasts (7), and holdfast (7) is matrix pattern structure and arranges.
4. the blast-furnace hot-air pipeline transposition section refractory brick according to claim 1 quick prosthetic appliance that comes off, is characterized in that the upper symmetrical multiple venting holes (5) of laying of described bend loss mould (2).
5. the blast-furnace hot-air pipeline transposition section refractory brick according to claim 1 quick prosthetic appliance that comes off, is characterized in that the upper symmetrical multiple grout holes (6) that are provided with of laying of described splice sections mould (3).
6. the blast-furnace hot-air pipeline transposition section refractory brick according to claim 1 quick prosthetic appliance that comes off, is characterized in that described supervisor hangs mould (9) for arch.
7. according to the fast repairing method that comes off of the blast-furnace hot-air pipeline transposition section refractory brick described in the arbitrary claim of claim 1 to 6, it is characterized in that comprising the steps:
A, monitoring temperature
Use infrared thermometer to measure the temperature of hot air duct bend loss, measure case temperature vertex and carry out mark as alarm set point, when the take off data of alarm set point exceedes 300 ℃ continuously, can judge premixer's refractory brick scaling loss, need to arrange blowing out to overhaul;
B, blowing out dismounting
After blowing out, by the mixing wind tube road overall pulling down of hot blast main pipe top;
Material is built in C, preparation
Build material and comprise luminite cement and bauxites aggregate, the granularity of bauxites aggregate is 1～3mm, and luminite cement and bauxites aggregate are prepared and stir by weight 1:3;
D, fabricated pipe bend section
Make bend loss mould according to the original design size in mixing wind tube road, bend loss mould inner side is provided with multiple holdfasts, and holdfast is matrix pattern structure arranges, the multiple venting holes of symmetrical laying on bend loss mould; First block venting hole and build bend loss with stopper, after building condensation of material, remove stopper and bend loss mould, breather valve is installed on venting hole;
E, build splice sections
Hang mould according to original design size installation splice sections mould and the supervisor in mixing wind tube road, supervisor hangs mould and plays and reinforce supporting role and guarantee that splice sections builds smoothly, build and frontly block grout hole with stopper, while building, vibrate with vibrating head, after building outer material side condensation, remove stopper, splice sections mould and supervisor and hang mould;
F, bend loss and splice sections docking
By integral by splicing flange welding to bend loss and splice sections, carry out pressure grouting by grout hole, injection material adopts phosphate mud, grouting pressure≤0.1Mpa, grout hole carries out respectively one by one, and each grout hole grouting time is 1 minute;
G, drying forming
In blast furnace, send cold wind, bend loss and splice sections, after air-dry latter 30 minutes, pass into hot-air seasoning, and 5 ℃ of wind-warm syndrome risings per hour, open the breather valve on venting hole, valve-off when excessive without steam in drying course.
8. the blast-furnace hot-air pipeline transposition section refractory brick according to claim 7 fast repairing method that comes off, before it is characterized in that building in described step e, blocks grout hole at splice sections mould and mould material contact site brush kerosene and with stopper.
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| CN201410041663.8A CN103805723B (en) | 2014-01-28 | 2014-01-28 | Blast-furnace hot-air pipeline transposition section refractory brick comes off quick prosthetic appliance and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339707A (en) * | 2017-07-21 | 2017-11-10 | 中国二十冶集团有限公司 | A kind of heating furnace hot-air duct lining construction method |
| CN111349735A (en) * | 2018-12-21 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Method for treating air leakage and redness of air mixing three-way pipeline of blast furnace hot blast stove |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103276130A (en) * | 2013-05-29 | 2013-09-04 | 新兴铸管股份有限公司 | Maintenance method for air leakage from pipeline of hot-air system of blast furnace |
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- 2014-01-28 CN CN201410041663.8A patent/CN103805723B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103276130A (en) * | 2013-05-29 | 2013-09-04 | 新兴铸管股份有限公司 | Maintenance method for air leakage from pipeline of hot-air system of blast furnace |
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| 丁汝才等: "首秦卡鲁金热风炉热风管道系统维护实践", 《炼铁》, vol. 31, no. 1, 28 February 2012 (2012-02-28), pages 38 - 41 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107339707A (en) * | 2017-07-21 | 2017-11-10 | 中国二十冶集团有限公司 | A kind of heating furnace hot-air duct lining construction method |
| CN111349735A (en) * | 2018-12-21 | 2020-06-30 | 新疆八一钢铁股份有限公司 | Method for treating air leakage and redness of air mixing three-way pipeline of blast furnace hot blast stove |
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