CN102424872A - Method for patching damaged blast furnace hot air pipeline inner liner in hot state - Google Patents

Method for patching damaged blast furnace hot air pipeline inner liner in hot state Download PDF

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Publication number
CN102424872A
CN102424872A CN2011103927966A CN201110392796A CN102424872A CN 102424872 A CN102424872 A CN 102424872A CN 2011103927966 A CN2011103927966 A CN 2011103927966A CN 201110392796 A CN201110392796 A CN 201110392796A CN 102424872 A CN102424872 A CN 102424872A
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China
Prior art keywords
liner
pipeline
hot
blast furnace
box hat
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Pending
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CN2011103927966A
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Chinese (zh)
Inventor
王子良
李志铁
李海峰
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Tianjin Iron and Steel Group Co Ltd
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Tianjin Iron and Steel Group Co Ltd
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Application filed by Tianjin Iron and Steel Group Co Ltd filed Critical Tianjin Iron and Steel Group Co Ltd
Priority to CN2011103927966A priority Critical patent/CN102424872A/en
Publication of CN102424872A publication Critical patent/CN102424872A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for patching a damaged blast furnace hot air pipeline inner liner in a hot state, which comprises the following steps that: A, a curved welding plate with the same thickness and the same diameter as a pipeline steel case is adopted according to the damage conditions of the inner liner; B, a plurality of fixed hooks are manufactured and are welded on the lower end surface of the curved welding plate, and a hanging lug and a pulp pressing hole are arranged on the upper end surface; C, holes are formed in the pipeline steel case, and regular shapes are formed; D, relevant dimensions are measured according to the inner liner shapes to be patched after being cleaned; E, mold erecting die casting is carried out by casting materials according to the measured shape, the casting materials are hung to a pipeline opening position by the hanging lug for installation, and the welding plate and the pipeline steel case are welded; and F, press slurry is pressed into gaps among heat insulation casting materials 5, a heat insulation layer, a light brick layer and a heavy brick layer through slurry pressing holes, and the construction pressure is maintained at 2kg/cm<2>. The hot air pipeline inner liner patching is carried out in the hot state, and only 15hours is needed, so the blast furnace hot air pipeline inner liner is quickly patched, the patching can be completed by the fixed maintenance time of a blast furnace, and the normal continuous production of the blast furnace is ensured.

Description

The method of the blast-furnace hot-air pipe lining that a kind of hot patching damages
Technical field
The invention belongs to blast-furnace hot-air repairing pipe method and technology field, the method for the blast-furnace hot-air pipe lining that particularly a kind of hot patching damages.
Background technology
Hot air duct connects blast furnace and hotblast stove, and the effect of hotblast stove is to store and provide hot blast for blast-furnace smelting.The effect of hot air duct is that each tuyere device of blast furnace is carried and be assigned to hot blast from hotblast stove, smelts iron.The blast-furnace hot-air pipeline comprises: hot blast manifold, the hot blast person in charge, wind mixed chamber or vertical tube, bustle pipe, blowpipe etc. are partly formed.The hot blast (1000 ℃~1280 ℃) that comes out from hotblast stove imports the hot blast person in charge through the hot blast manifold that is connected with every hotblast stove earlier; Get into the bustle pipe of ring outside blast-furnace body through wind mixed chamber or vertical tube again, hot blast will be assigned to blast furnace blowpipe device on every side and get into blast-furnace tuyere in bustle pipe.
The inner lining structure of hot air duct; Usually adopt thermal insulation layer (fire-resistant sprayed coating)+light cinder brick (Insulating Bricks)+heavy brick (working lining toughness mullite brick) to form, junctions that each position on the hot air duct (hot blast manifold, the hot blast person in charge, bustle pipe, blowpipe and manhole) is connected or the contact mouthful modular tile structures that adopt more.Hot air duct is local often to be damaged, and comes off, and like untimely reparation, the very fast scaling loss fusing of hot air duct box hat influences blast furnace production.
If adopt conventional reparation hot air duct lining method, will be earlier to the hot air duct cooling, treat that pipe temperature reduces after, get into the reparation of pipe interior formwork again, the time that this needs 7 days, have a strong impact on the production of blast furnace, lose huge.
Summary of the invention
The present invention provides a kind of method of blast-furnace hot-air pipe lining of hot patching damage for solving the technical problem that exists in the known technology.
The technical scheme that the present invention takes for the technical problem that exists in the solution known technology is: the method for the blast-furnace hot-air pipe lining that a kind of hot patching damages comprises following step:
A, according to pipeline heating position, judge the liner damaged condition, select the weldering plate with pipeline box hat uniform thickness in advance for use, curl according to the diameter dimension of pipeline box hat, size is greater than the area that damages liner;
B, make several stay hooks, length is less than the thickness value of pipe lining, and distributes and be welded on the curling weldering plate, and middle part, weldering plate upper surface is provided with a hanger, is welded with the mud jacking hole on four angles of upper surface;
C, perforate on the pipeline box hat, the size of the thermal insulation layer of dismounting, light cinder brick layer and the consistent size of heavy brick layer, the shape of a rule of formation;
D, according to the liner shape of need repairing after the cleaning, the relative dimensions of the liner that measurements needs to repair need making formwork shape based on measurements;
E, the good weldering plate that will curl cut according to the size of the perforate of pipeline box hat, and pour into a mould by the formwork shape of measuring with mould material, wait to solidify the back and winch to the pipeline tapping place through hanger, install, and will weld plate and pipeline box hat to weld;
F, in the mud jacking hole of weldering plate, grouting material is pressed into the slit between insulated pouring material and thermal insulation layer, light cinder brick layer, the heavy brick layer, operation pressure maintenance 2kg/cm 2
Advantage and positively effect that the present invention has are: the present invention carries out the reparation of hot air duct liner under hot state; Only need 15 hour time; The blast-furnace hot-air pipe lining is repaired fast, utilized blast furnace periodical repair equal time just can accomplish, guaranteed the normal continuous production of blast furnace.
Description of drawings
Fig. 1 is the liner internal structure synoptic diagram of hot air duct;
Fig. 2 is the outside synoptic diagram of liner that needs repairing;
Fig. 3 is the weldering plate structure and uses synoptic diagram;
Fig. 4 is the structural representation behind the laying-in hot repair in the hot air duct.
Among Fig. 1~Fig. 4: 1. pipeline box hat, 2. thermal insulation layer, 3. light cinder brick layer, 4. heavy brick layer, 5. mould material, 6. stay hook, 7. weldering plate, 8. mud jacking hole, 9. hanger.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, the following examples of giving an example now specify as follows:
See also Fig. 1~Fig. 4, according to the pipe lining damaged condition, the method for the blast-furnace hot-air pipe lining that a kind of hot patching damages comprises following step:
A, according to pipeline heating position, judge the liner damaged condition, select the weldering plate 7 with pipeline box hat 1 uniform thickness in advance for use, curl according to the diameter dimension of pipeline box hat 1, size is greater than the area that damages liner;
B, make several stay hooks 6, length is less than the thickness value of pipe lining, and distributes and be welded on the curling weldering plate 7, and middle part, weldering plate 7 upper surfaces is provided with a hanger 9, is welded with mud jacking hole 8 on four angles of upper surface;
C, perforate on pipeline box hat 1, the consistent size of the thermal insulation layer 2 of dismounting, the size of light cinder brick layer 3 and heavy brick layer 4, the shape of a rule of formation;
D, according to the liner shape of need repairing after the cleaning, the relative dimensions of the liner that measurements needs to repair need making formwork shape based on measurements;
E, the good steel plate 7 that will curl cut according to the size of the perforate of pipeline box hat 1, and pour into a mould by the formwork shape of measuring with mould material 5, wait to solidify the back and winch to the pipeline tapping place through hanger 9, install, and will weld plate 7 and weld with pipeline box hat 1;
F, in the mud jacking hole 8 of weldering plate 7, grouting material is pressed into the slit between insulated pouring material 5 and thermal insulation layer 2, light cinder brick layer 3, the heavy brick layer 4, operation pressure maintenance 2kg/cm 2
Through aforesaid method, under hot state, carry out the reparation of hot air duct liner, only need 15 hours time, the blast-furnace hot-air pipe lining is repaired fast, utilize blast furnace periodical repair equal time just can accomplish, guaranteed the normal continuous production of blast furnace.

Claims (1)

1. the method for the blast-furnace hot-air pipe lining of a hot patching damage is characterized in that, comprises following step:
A, according to pipeline heating position, judge the liner damaged condition, select the weldering plate (7) with pipeline box hat (1) uniform thickness in advance for use, curl according to the diameter dimension of pipeline box hat (1), size is greater than the area that damages liner;
B, make several stay hooks (6), length is less than the thickness value of pipe lining, and distributes and be welded on the curling weldering plate (7), and middle part, weldering plate (7) upper surface is provided with a hanger (9), is welded with mud jacking hole (8) on four angles of upper surface;
C, perforate on pipeline box hat (1), the size of the thermal insulation layer of dismounting (2), light cinder brick layer (3) and the consistent size of heavy brick layer (4), the shape of a rule of formation;
D, according to the liner shape of need repairing after the cleaning, the relative dimensions of the liner that measurements needs to repair is according to measurement size making formwork shape;
E, the good weldering plate (7) that will curl cut according to the size of the perforate of pipeline box hat (1); And pour into a mould by the formwork shape of measuring with mould material (5); Wait to solidify the back and winch to the pipeline tapping place through hanger (9); Install, will weld plate (7) and weld with pipeline box hat (1);
F, in the mud jacking hole (8) of weldering plate (7), grouting material is pressed into the slit between insulated pouring material (5) and thermal insulation layer (2), light cinder brick layer (3), the heavy brick layer (4), operation pressure maintenance 2kg/cm 2
CN2011103927966A 2011-12-01 2011-12-01 Method for patching damaged blast furnace hot air pipeline inner liner in hot state Pending CN102424872A (en)

Priority Applications (1)

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CN2011103927966A CN102424872A (en) 2011-12-01 2011-12-01 Method for patching damaged blast furnace hot air pipeline inner liner in hot state

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN105018664A (en) * 2015-08-13 2015-11-04 广东韶钢松山股份有限公司 Rapid repairing technology of blast furnace hot blast stove pipeline
CN105369002A (en) * 2015-12-09 2016-03-02 天津钢铁集团有限公司 Repair tooling of hot-blast branch pipe lining of hot-blast furnace and repair method thereof
CN106693616A (en) * 2015-11-17 2017-05-24 鞍钢股份有限公司 Method for repairing inner wall of acid-making absorption tower
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
CN109735675A (en) * 2019-01-28 2019-05-10 五冶集团上海有限公司 A kind of hot blast main duct of blast furnace refractory lining Quick overhaul method
CN110345772A (en) * 2019-06-06 2019-10-18 国家电投集团黄河上游水电开发有限责任公司 A kind of high-temperature flue is quickly met an urgent need method for repairing and mending
CN110408735A (en) * 2018-04-28 2019-11-05 广东韶钢松山股份有限公司 A kind of restorative procedure at the gooseneck position under blast furnace air supply system bustle pipe
CN110806106A (en) * 2019-10-29 2020-02-18 首钢京唐钢铁联合有限责任公司 Method and structure for repairing collapse of refractory material at top of heating furnace

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
CN105018664A (en) * 2015-08-13 2015-11-04 广东韶钢松山股份有限公司 Rapid repairing technology of blast furnace hot blast stove 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
CN106693616A (en) * 2015-11-17 2017-05-24 鞍钢股份有限公司 Method for repairing inner wall of acid-making absorption tower
CN106693616B (en) * 2015-11-17 2019-04-26 鞍钢股份有限公司 A kind of relieving haperacidity absorption inner wall of tower restorative procedure
CN105369002A (en) * 2015-12-09 2016-03-02 天津钢铁集团有限公司 Repair tooling of hot-blast branch pipe lining of hot-blast furnace and repair method thereof
CN105369002B (en) * 2015-12-09 2017-12-29 天津钢铁集团有限公司 A kind of hot air furnace hot air branch pipe repairing inner liner frock and its method for repairing and mending
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
CN110408735A (en) * 2018-04-28 2019-11-05 广东韶钢松山股份有限公司 A kind of restorative procedure at the gooseneck position under blast furnace air supply system bustle pipe
CN109735675A (en) * 2019-01-28 2019-05-10 五冶集团上海有限公司 A kind of hot blast main duct of blast furnace refractory lining Quick overhaul method
CN110345772A (en) * 2019-06-06 2019-10-18 国家电投集团黄河上游水电开发有限责任公司 A kind of high-temperature flue is quickly met an urgent need method for repairing and mending
CN110806106A (en) * 2019-10-29 2020-02-18 首钢京唐钢铁联合有限责任公司 Method and structure for repairing collapse of refractory material at top of heating furnace

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Application publication date: 20120425