CN203754747U - Equipment for rapidly restoring fall of refractory bricks of premixer of hot air pipeline - Google Patents

Equipment for rapidly restoring fall of refractory bricks of premixer of hot air pipeline Download PDF

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Publication number
CN203754747U
CN203754747U CN201420055169.2U CN201420055169U CN203754747U CN 203754747 U CN203754747 U CN 203754747U CN 201420055169 U CN201420055169 U CN 201420055169U CN 203754747 U CN203754747 U CN 203754747U
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CN
China
Prior art keywords
hot air
premixer
welded
horizontal
air pipeline
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Expired - Fee Related
Application number
CN201420055169.2U
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Chinese (zh)
Inventor
常学峰
高瑞明
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Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
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Gansu Jiu Steel Group Hongxing Iron and Steel Co Ltd
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Priority to CN201420055169.2U priority Critical patent/CN203754747U/en
Application granted granted Critical
Publication of CN203754747U publication Critical patent/CN203754747U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model belongs to the technical field of metallurgical equipment and in particular relates to equipment for rapidly restoring fall of refractory bricks of a premixer of a hot air pipeline, and is applicable to quick restoration of fall and damage of brick bodies when the refractory bricks inside a shaft type pipeline of the premixer of the hot air pipeline of a blast furnace are under working conditions like thermal shock. The equipment for rapidly restoring the fall of the refractory bricks of the premixer of the hot air pipeline is characterized in that arc-shaped steel plates are welded into an inner mould block by block, a vertical section welding disc and a horizontal section welding disc on the inner mould are respectively welded with a vertical section opening forming part and a horizontal section opening forming part of the hot air pipeline, the welded inner mould is welded with a shell supporting mould into a whole by virtue of the horizontal section welding disc, construction difficulty is greatly reduced, a restoration construction period is greatly shortened to 3-4 days, and further, blowing out time is shortened and cost is reduced; rivets are arranged in the shell supporting mould and are in a Y shape, and the angle of the opening is 120 degrees; multiple rivets are arranged at the inner side of the shell supporting mould, and the rivets are arranged in a shape like a Chinese character 'TIAN' (field); the rivets can fix a pouring material more firmly, the pouring material is more durable and firmer after being condensed and moulded, and service life is greatly prolonged.

Description

The hot air duct premixer refractory brick quick prosthetic appliance that comes off
Technical field
The utility model belongs to technical field of metallurgical equipment, the hot air duct premixer refractory brick quick prosthetic appliance that comes off particularly, is applicable to that blast-furnace hot-air pipeline premixer vertical shaft type pipe interior refractory brick masonry under the working conditions such as thermal shock 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, hot blast temperature reaches more than 1250 ℃, and pressure is in 0.3~0.4MPa scope.For reaching above-mentioned purpose, hotblast stove improves from each side such as burner skill, the configurations of hotblast stove structure, and the tubing system of heat air delivery is not carried out the improvement of essence and is continued to use traditional hot air duct always, when wind-warm syndrome reaches more than 1250 ℃, often there is the pipe interior cracking of building body of resistance to material, come off and cause the phenomenon that conduit enclosure is rubescent, when serious, also can cause the accident of burning.
At present hot air duct reparation adopts grouting, shell to cut open claying repairing, the outside method such as cooling of fetching water more, 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 place, air port, 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.
Utility model content
The purpose of this utility model is to provide a kind of convenient, maintenance duration hot air duct premixer refractory brick short, long service life quick prosthetic appliance that comes off that keeps in repair.
The utility model solves the technical scheme that its technical problem adopts:
The hot air duct premixer refractory brick quick prosthetic appliance that comes off, comprise internal mold and shell formwork, on internal mold, be respectively equipped with vertical section welded disc and horizontal section welded disc, internal mold is integrally welded by horizontal section welded disc and shell formwork, between internal mold and shell formwork, form and build cavity, between shell formwork upper limb and vertical section welded disc, reserve and build opening for feed.
The described opening for feed of building is provided with plugging plate, and plugging plate is provided with and is pressed into mud vision slit, mud pours into hole and mud is pressed into hole.
Described shell formwork inner side is provided with holdfast, and holdfast is Y-shaped, and opening angle is 120 °.
Described shell formwork inner side is provided with a plurality of holdfasts, and holdfast is matrix pattern structure and arranges.
On described shell formwork, offer breather hole, breather hole is equidistantly arranged.
The beneficial effects of the utility model are:
1, with curved plate block-by-block, be welded into internal mold, vertical section welded disc on internal mold and horizontal section welded disc are welded with vertical section tapping and the horizontal section tapping of hot air duct respectively, welded after internal mold integrally welded by horizontal section welded disc and shell formwork, significantly reduced difficulty of construction, the reparation duration significantly foreshortens to 3-4 days, and then has shortened blowing out and reduced cost.
2, in described shell formwork, be provided with holdfast, holdfast is Y-shaped, and opening angle is 120 °.Described shell formwork inner side is provided with a plurality of holdfasts, and holdfast is matrix pattern structure and arranges.Holdfast can be more fixing pouring material, firm and durable more after pouring material condensation moulding, significantly promote work-ing life.
3, by mud, be pressed into hole and carry out pressure grouting, improved the filling degree of compactness of pouring material, improved heat insulation usefulness, meanwhile, shell formwork is laid a plurality of breather holes, discharges excess steam during drying forming, is convenient to fast shaping and goes into operation.
Accompanying drawing explanation
Fig. 1 is existing hot air duct structural representation;
Fig. 2 is position of opening schematic diagram of the present utility model;
Fig. 3 is anchor structure schematic diagram of the present utility model;
Fig. 4 is the holdfast of the present utility model schematic diagram of arranging;
Fig. 5 is structural representation of the present utility model;
Fig. 6 is the breather hole of the present utility model schematic diagram of arranging;
Fig. 7 is plugging plate structural representation of the present utility model.
Embodiment
A kind of hot air duct premixer refractory brick quick prosthetic appliance that comes off, comprise internal mold 1 and shell formwork 2, on internal mold 1, be respectively equipped with vertical section welded disc 3 and horizontal section welded disc 4, internal mold 1 is integrally welded by horizontal section welded disc 4 and shell formwork 2, between internal mold 1 and shell formwork 2, form and build cavity 5, between shell formwork 2 upper limbs and vertical section welded disc 3, reserve and build opening for feed 6.The described opening for feed 6 of building is provided with plugging plate 7, and plugging plate 7 is provided with and is pressed into mud vision slit 8, mud pours into hole 9 and mud is pressed into hole 10.Described shell formwork 2 inner sides are provided with holdfast 11, and holdfast 11 is Y-shaped, and opening angle is 120 °.Described shell formwork 2 inner sides are provided with a plurality of holdfasts 11, and holdfast 11 is matrix pattern structure and arranges.On described shell formwork 2, offer breather hole 12, breather hole 12 is equidistantly arranged.
The concrete use installation steps of prosthetic appliance are as follows:
A, monitoring temperature
Use infrared thermometer to measure case temperature, measure case temperature vertex and carry out mark as alarm set point, when the take off data of alarm set point surpasses 300 ℃ continuously, can judge that refractory brick scaling loss inner wall of tube shell that starts to come off in premixer's has 1250 ℃ of hot blasts circulations, need to arrange blowing out to overhaul;
B, determine position of opening
After blowing out, the grid that draws 600mm spacing at shell centered by alarm set point carries out piecemeal thermometric, and the piecemeal that temperature is surpassed to 250 ℃ carries out mark, according to the overtemperature piecemeal quantity of mark, calculates perforated area;
C, damping down perforate
Alarm set point place at shell after blast furnace staying cuts open detection hole, and staff wears insulation mask and checks inner masonry dropping situations by surveying hole, calculates perforated area and covers masonry completely and come off behind region and cut perforate according to grid edge; During perforate, dismantle vertical section masonry after first dismantling horizontal section masonry;
D, installation internal mold and shell formwork
With curved plate block-by-block, be welded into internal mold 1, vertical section welded disc 3 on internal mold 1 and horizontal section welded disc 4 are welded with vertical section tapping and the horizontal section tapping of hot air duct respectively, have welded internal mold 1 rear integrally welded by horizontal section welded disc 4 and shell formwork 2;
Material is built in E, 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;
F, substep are built
First use stopper shutoff breather hole, first to building the horizontal segment of cavity, build, after condensation, segmentation is built cavity and is built vertical segment again; Be poured into while building opening for feed 6 and stop building, build and on opening for feed 6, weld plugging plate 7, by mud, pouring into hole 9 fills and builds material, build material cannot enter time shutoff welding mud pour into hole 9, and by mud, be pressed into hole 10 and carry out pressure grouting, mud pressure≤0.1MPa, mud vision slit 8 overflows while building material and stops pressure grouting, removes stopper and breather valve is installed;
G, drying forming
Blast furnace is used cold wind air-supply, blow to change for latter 40 minutes and send hot blast, mixed wind regulates controls blast furnace, in blast furnace, send cold wind, after air-dry latter 40 minutes of bend loss and splice sections, pass into hot-air seasoning, 5 ℃ of wind-warm syndrome risings per hour, in drying course, open the breather valve on venting hole, valve-off when excessive without steam.
Embodiment: No. 7 blast furnaces of wine steel iron work of take illustrate as example.
A, monitoring temperature
Use infrared thermometer to measure case temperature, measure case temperature vertex and carry out mark as alarm set point, when the take off data of alarm set point surpasses 300 ℃ continuously, can judge that refractory brick scaling loss inner wall of tube shell that starts to come off in premixer's has 1250 ℃ of hot blasts circulations, need to arrange blowing out to overhaul;
B, determine position of opening
After blowing out, the grid that draws 600mm spacing at shell centered by alarm set point carries out piecemeal thermometric, and the piecemeal that temperature is surpassed to 250 ℃ carries out mark, according to the overtemperature piecemeal quantity of mark, calculates perforated area;
C, damping down perforate
Alarm set point place at shell after blast furnace staying cuts open detection hole, and staff wears insulation mask and checks inner masonry dropping situations by surveying hole, calculates perforated area and covers masonry completely and come off behind region and cut perforate according to grid edge; During perforate, dismantle vertical section masonry after first dismantling horizontal section masonry;
D, installation internal mold and shell formwork
With curved plate block-by-block, be welded into internal mold 1, vertical section welded disc 3 on internal mold 1 and horizontal section welded disc 4 are welded with vertical section tapping and the horizontal section tapping of hot air duct respectively, have welded internal mold 1 rear integrally welded by horizontal section welded disc 4 and shell formwork 2;
Material is built in E, 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;
F, substep are built
First use stopper shutoff breather hole, first to building the horizontal segment of cavity, build, after condensation, segmentation is built cavity and is built vertical segment again; Be poured into while building opening for feed 6 and stop building, build and on opening for feed 6, weld plugging plate 7, by mud, pouring into hole 9 fills and builds material, build material cannot enter time shutoff welding mud pour into hole 9, and by mud, be pressed into hole 10 and carry out pressure grouting, mud pressure≤0.1MPa, mud vision slit 8 overflows while building material and stops pressure grouting, removes stopper and breather valve is installed;
G, drying forming
Blast furnace is used cold wind air-supply, blow to change for latter 40 minutes and send hot blast, mixed wind regulates controls blast furnace, in blast furnace, send cold wind, after air-dry latter 40 minutes of bend loss and splice sections, pass into hot-air seasoning, 5 ℃ of wind-warm syndrome risings per hour, in drying course, open the breather valve on venting hole, valve-off when excessive without steam.
Mixing wind tube road skin temperature after repairing is monitored 2 days continuously, and top temperature is 230 ℃, reaches heat insulation requirement after reparation.72 hours actual repair used times, 50.95 ten thousand yuan of recondition expenses.Compare all significantly reductions of duration and expense with legacy equipment, technique.

Claims (5)

1. the hot air duct premixer refractory brick quick prosthetic appliance that comes off, it is characterized in that comprising internal mold (1) and shell formwork (2), on internal mold (1), be respectively equipped with vertical section welded disc (3) and horizontal section welded disc (4), internal mold (1) is integrally welded by horizontal section welded disc (4) and shell formwork (2), between internal mold (1) and shell formwork (2), form and build cavity (5), between shell formwork (2) upper limb and vertical section welded disc (3), reserve and build opening for feed (6).
2. the hot air duct according to claim 1 premixer refractory brick quick prosthetic appliance that comes off, described in it is characterized in that, build opening for feed (6) and be provided with plugging plate (7), plugging plate (7) is provided with and is pressed into mud vision slit (8), mud pours into hole (9) and mud is pressed into hole (10).
3. the hot air duct according to claim 1 premixer refractory brick quick prosthetic appliance that comes off, is characterized in that described shell formwork (2) inner side is provided with holdfast (11), and holdfast (11) is Y-shaped, and opening angle is 120 °.
4. the hot air duct according to claim 3 premixer refractory brick quick prosthetic appliance that comes off, is characterized in that described shell formwork (2) inner side is provided with a plurality of holdfasts (11), and holdfast (11) is matrix pattern structure and arranges.
5. the hot air duct according to claim 1 premixer refractory brick quick prosthetic appliance that comes off, is characterized in that offering breather hole (12) on described shell formwork (2), and breather hole (12) is equidistantly arranged.
CN201420055169.2U 2014-01-28 2014-01-28 Equipment for rapidly restoring fall of refractory bricks of premixer of hot air pipeline Expired - Fee Related CN203754747U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420055169.2U CN203754747U (en) 2014-01-28 2014-01-28 Equipment for rapidly restoring fall of refractory bricks of premixer of hot air pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103898263A (en) * 2014-01-28 2014-07-02 甘肃酒钢集团宏兴钢铁股份有限公司 Quick fixing equipment and method for fall-off of refractory bricks of warm-air pipe premixer
CN106949337A (en) * 2017-03-30 2017-07-14 中国十九冶集团有限公司 A kind of hot air duct collapses the restorative procedure of liner

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103898263A (en) * 2014-01-28 2014-07-02 甘肃酒钢集团宏兴钢铁股份有限公司 Quick fixing equipment and method for fall-off of refractory bricks of warm-air pipe premixer
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
CN106949337A (en) * 2017-03-30 2017-07-14 中国十九冶集团有限公司 A kind of hot air duct collapses the restorative procedure of liner

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GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140806

Termination date: 20150128