CN105018664A - Rapid repairing technology of blast furnace hot blast stove pipeline - Google Patents
Rapid repairing technology of blast furnace hot blast stove pipeline Download PDFInfo
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Abstract
The invention relates to a rapid repairing technology of a blast furnace hot blast stove pipeline. The technology comprises the steps that firstly, imperfect ports are cleaned; secondly, modes are arranged; thirdly, a fish skeleton frame is manufactured; fourthly, high-abrasion-resisting ceramic pouring is conducted; fifthly, a zirconium-contained ceramic fiber blanket is laid fully, and a steel shell is recovered; and finally, mudjacking is conducted. The hot blast stove pipeline can be put into operation after the steps are conducted. To achieve the solidifying effect, it is better to follow the progressive principle when the temperature and pressure of supplied air of a hot blast stove are improved. After the repaired hot blast stove pipeline is put into operation, a daily monitoring checking rule should be established for the part. The rapid repairing technology has the beneficial effects that maintaining is easy and convenient, cost is low, the requirement for rapid repairing can be met, a blast furnace can resume production as soon as possible, and after the hot blast stove pipeline breaks down, production is recovered rapidly, and the production cost is reduced; and refractory needed for repairing has good high-temperature and high-pressure resisting performance and can meet the requirement for normal air supplying of the hot blast stove.
Description
Technical field
The invention belongs to pipe-line equipment recovery technique field, relate to a kind of blast funnace hot blast stove pipeline technique for rapidly repairing.
Background technology
Blast funnace hot blast stove pipeline is the transport pipe of blast furnace high wind-warm syndrome, is in high temperature (> 1000 DEG C) and high pressure (> 0.15Mpa) running environment for a long time.Affect by aging etc. the factor of thermal stresses, resistance to material, pipeline of hot air furnace system may there will be breakage suddenly, and breakage has burns and avalanche two kinds of phenomenons, once burning and avalanche appears in pipeline of hot air furnace system, this hotblast stove must promptly maybe exit by damping down by blast furnace, causes great effect to blast fumance.The material more complicated of current hot air duct, generally include one deck high alumina brick, two layers of insulating brick, one deck tapetum fibrosum and the resistance to thermal spray coating of one deck, at local key position as house steward and arm Where Three Faults Meet, the bricking of house steward and bustle pipe Where Three Faults Meet is modular tile, occur burning or after avalanche, existing common repair methods carrys out Recovery processing according to the different types of refractory brick of former piping design drawing, if any ready-made supporting refractory brick, blast furnace staying or hotblast stove are stopped using and can be repaired for 3 ~ 5 days, as scene does not have refractory brick, need to look for producer again make or buy, blast furnace just needs damping down or hotblast stove to stop using to repair for 10 ~ 30 days, this is concerning quantity-produced blast furnace, all can have a huge impact in production restoration and cost.Therefore, common repair methods not only can increase follow-up furnace condition recovery difficulty and production cost, and inconvenient operation, consuming time longer.
Summary of the invention
In order to overcome the above-mentioned shortcoming of prior art, the invention provides a kind of blast funnace hot blast stove pipeline technique for rapidly repairing, it can in the short period of time, be repaired after completing blast-furnace hot-air pipeline breakage fast, shorten the treatment time, reduce costs expense and reduce labour intensity.
The technical solution adopted for the present invention to solve the technical problems is: a kind of blast funnace hot blast stove pipeline technique for rapidly repairing, and its processing step is:
The first step: the cleaning of incomplete mouth; Hot air duct to be burnt or the incomplete mouth of avalanche is cleared up, comprise the resistance to material dropping to and residual resistance to material in pipeline and breach have loosened, mainly solve the impact on supply air system and raising repairing effect, resistance to material cleans out rear pressurized air and purges gap portions;
Second step: make mode; The general steel plate thick with 2 ~ 4mm makes mode, requires: mode size is greater than breach limit 20mm; Circular arc degree maintains former pipe shape as far as possible; Mode is connected with working lining refractory brick intimate surface in pipeline, if any hollow joint fibrefelt by tight for seam plug; In tube road with flitch by mode firm supporting, outerly do point of suppon or mode is strained by other fixed position steel wires outward, when guaranteeing cast mode firmly, stable;
3rd step: make fish-bone frame; Adult fish skeleton is welded with diameter 4 ~ 6mm Deformed Steel Bars and wire rod in the scope of cast, if cast area is larger, then make thick skeleton with the Deformed Steel Bars of 8 ~ 10mm, again several fish-bone framves are together in series, guarantee to keep the bulk strength of castable, skeleton is made rear requirement and is fixed on the former medium position of resistance to material;
4th step: high-strength abrasion-proof ceramic material is poured into a mould; Mould material to be stirred cast by mould material operation instruction and proportioning; Uninterrupted construction is required during material cast, one-time cast-forming, applies vibrating head vibration compacting when pouring into a mould for big area, answers F.F. to go out slowly during vibration, should carry out successively from a direction to another direction when vibrating, when the cast of mould material thickness distance stops cast with during the shell 20mm of hole;
5th step: full paving, containing zircon ceramic tapetum fibrosum, recovers box hat; After requiring that charge level to be cast is emerged without gas, mould material is hardened, is completely spread by ceramic fiber blanket, and shell is beaten groove, recovers box hat;
6th step: mud jacking; The new tube wall installed makes venting hole with φ 32mm steel pipe, be in the milk, the venting hole that cast area is larger makes 2 usually, one for grouting, when another is for being in the milk be vented, position select cast position two ends, cast area less usual cast position open a grout hole, near cast, open a hole as venting hole, during grouting, can be considered that in reparation position, packing is real with another hole pulp.Grouting material is High-Alumina hot air duct press-in material;
More than be disposed, pipeline of hot air furnace can put into operation, and for reaching the effect of solidification, hotblast stove wind pushing temperature and pressure preferably can be followed incremental principle and improve, after pipeline of hot air furnace after reparation puts into operation, tackle this position and set up daily monitoring inspection system.
In the described the first step, operation relates to high temperature, should dress appliances for labor protection before operation, prevents from scalding.
For improving the heat-resisting effect of ceramic fiber in described 5th step, application claims refractoriness is more than or equal to the ceramic fiber containing zirconium matter of 1300 DEG C.
The invention has the beneficial effects as follows: the present invention can promote the use of the reparation to the large, medium and small type blast-furnace hot-air pipeline of the same industry, apply on Baoshan Iron and Steel Group's Shaoguan iron and steel 2500,750 and 450m3 blast-furnace hot-air pipeline at present, there is easy maintenance, expense is low, the requirement of repairing fast can be reached, can promote that blast furnace resumes production as early as possible, after hot air duct breaks down, resume production fast, reach features such as reducing production cost, repair resistance to material used and there is good high temperature high voltage resistant performance, the requirement that hotblast stove is normally blown can be met.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
A kind of blast funnace hot blast stove pipeline technique for rapidly repairing, its processing step is:
The first step: the cleaning of incomplete mouth; Hot air duct to be burnt or the incomplete mouth of avalanche is cleared up, comprise the resistance to material dropping to and residual resistance to material in pipeline and breach have loosened, mainly solve the impact on supply air system and raising repairing effect, resistance to material cleans out rear pressurized air and purges gap portions;
Second step: make mode; The general steel plate thick with 2 ~ 4mm makes mode, requires: mode size is greater than breach limit 20mm; Circular arc degree maintains former pipe shape as far as possible; Mode is connected with working lining refractory brick intimate surface in pipeline, if any hollow joint fibrefelt by tight for seam plug; In tube road with flitch by mode firm supporting, outerly do point of suppon or mode is strained by other fixed position steel wires outward, when guaranteeing cast mode firmly, stable;
3rd step: make fish-bone frame; Adult fish skeleton is welded with diameter 4 ~ 6mm Deformed Steel Bars and wire rod in the scope of cast, if cast area is larger, then make thick skeleton with the Deformed Steel Bars of 8 ~ 10mm, again several fish-bone framves are together in series, guarantee to keep the bulk strength of castable, skeleton is made rear requirement and is fixed on the former medium position of resistance to material;
4th step: high-strength abrasion-proof ceramic material is poured into a mould; Mould material to be stirred cast by mould material operation instruction and proportioning; Uninterrupted construction is required during material cast, one-time cast-forming, applies vibrating head vibration compacting when pouring into a mould for big area, answers F.F. to go out slowly during vibration, should carry out successively from a direction to another direction when vibrating, when the cast of mould material thickness distance stops cast with during the shell 20mm of hole;
5th step: full paving, containing zircon ceramic tapetum fibrosum, recovers box hat; After requiring that charge level to be cast is emerged without gas, mould material is hardened, is completely spread by ceramic fiber blanket, and shell is beaten groove, recovers box hat;
6th step: mud jacking; The new tube wall installed makes venting hole with φ 32mm steel pipe, be in the milk, the venting hole that cast area is larger makes 2 usually, one for grouting, when another is for being in the milk be vented, position select cast position two ends, cast area less usual cast position open a grout hole, near cast, open a hole as venting hole, during grouting, can be considered that in reparation position, packing is real with another hole pulp.Grouting material is High-Alumina hot air duct press-in material;
More than be disposed, pipeline of hot air furnace can put into operation, and for reaching the effect of solidification, hotblast stove wind pushing temperature and pressure preferably can be followed incremental principle and progressively improve, after pipeline of hot air furnace after reparation puts into operation, tackle this position and set up daily monitoring inspection system.
In the described the first step, operation relates to high temperature, should dress appliances for labor protection before operation, prevents from scalding.
For improving the heat-resisting effect of ceramic fiber in described 5th step, application claims refractoriness is more than or equal to the ceramic fiber containing zirconium matter of 1300 DEG C.
Table 1 high-strength abrasion-proof ceramic mould material physical and chemical index:
Table 2 is containing the ceramic fiber physical and chemical index of zirconium matter:
| Project | Unit | Index |
| Working temperature | ℃ | ≥1300 |
| AL2O3 | % | ≥40 |
| Fe2O3 | % | ≤0.2 |
| ZrO2 | % | 15～17 |
| Volume density | Kg/m3 | 130～160 |
| Tension/folding intensity | Mpa | ≥0.3 |
| Linear shrinkage ratio (1400 DEG C × 24h) | % | ≤4.0 |
| Thermal conductivity (600 DEG C) | W/(m.k) | ≤0.16 |
Table 3 High-Alumina hot air duct press-in material physical and chemical index:
| Project | Unit | Index |
| Al2O3 | % | ≥56 |
| Volume density | g/C㎡ | ≥2.2 |
| Folding strength (1200 DEG C × 3h is burned) | Mpa | ≥12 |
| Compressive strength (200 DEG C × 24h is burned) | Mpa | ≥20 |
| Compressive strength (1200 DEG C × 3h is burned) | Mpa | ≥22 |
| Linear change rate (1200 DEG C × 3h burns rear) | % | 0-0.8 |
| Folding strength (200 DEG C × 24h is burned) | Mpa | ≥8 |
The present invention can promote the use of the reparation to the large, medium and small type blast-furnace hot-air pipeline of the same industry, apply on Baoshan Iron and Steel Group's Shaoguan iron and steel 2500,750 and 450m3 blast-furnace hot-air pipeline at present, there is easy maintenance, expense is low, the requirement of repairing fast can be reached, can promote that blast furnace resumes production as early as possible, reach after hot air duct breaks down, resume production fast, reduce the features such as production cost, repair resistance to material used and there is good high temperature high voltage resistant performance, the requirement that hotblast stove is normally blown can be met.
Claims (3)
1. a blast funnace hot blast stove pipeline technique for rapidly repairing, is characterized in that processing step is:
The first step: the cleaning of incomplete mouth; Hot air duct to be burnt or the incomplete mouth of avalanche is cleared up, comprise the resistance to material dropping to and residual resistance to material in pipeline and breach have loosened, mainly solve the impact on supply air system and raising repairing effect, resistance to material cleans out rear pressurized air and purges gap portions;
Second step: make mode; The general steel plate thick with 2 ~ 4mm makes mode, requires: mode size is greater than breach limit 20mm; Circular arc degree maintains former pipe shape as far as possible; Mode is connected with working lining refractory brick intimate surface in pipeline, if any hollow joint fibrefelt by tight for seam plug; In tube road with flitch by mode firm supporting, outerly do point of suppon or mode is strained by other fixed position steel wires outward, when guaranteeing cast mode firmly, stable;
3rd step: make fish-bone frame; Adult fish skeleton is welded with diameter 4 ~ 6mm Deformed Steel Bars and wire rod in the scope of cast, if cast area is larger, then make thick skeleton with the Deformed Steel Bars of 8 ~ 10mm, again several fish-bone framves are together in series, guarantee to keep the bulk strength of castable, skeleton is made rear requirement and is fixed on the former medium position of resistance to material;
4th step: high-strength abrasion-proof ceramic material is poured into a mould; Mould material to be stirred cast by mould material operation instruction and proportioning; Uninterrupted construction is required during material cast, one-time cast-forming, applies vibrating head vibration compacting when pouring into a mould for big area, answers F.F. to go out slowly during vibration, should carry out successively from a direction to another direction when vibrating, when the cast of mould material thickness distance stops cast with during the shell 20mm of hole;
5th step: full paving, containing zircon ceramic tapetum fibrosum, recovers box hat; After requiring that charge level to be cast is emerged without gas, mould material is hardened, is completely spread by ceramic fiber blanket, and shell is beaten groove, recovers box hat;
6th step: mud jacking; The new tube wall installed makes venting hole with φ 32mm steel pipe, be in the milk, the venting hole that cast area is larger makes 2 usually, one for grouting, when another is for being in the milk be vented, position select cast position two ends, cast area less usual cast position open a grout hole, near cast, open a hole as venting hole, during grouting, can be considered that in reparation position, packing is real with another hole pulp; Grouting material is High-Alumina hot air duct press-in material;
More than be disposed, pipeline of hot air furnace can put into operation, and for reaching the effect of solidification, hotblast stove wind pushing temperature and pressure preferably can be followed incremental principle and improve, after pipeline of hot air furnace after reparation puts into operation, tackle this position and set up daily monitoring inspection system.
2. blast funnace hot blast stove pipeline technique for rapidly repairing as claimed in claim 1, is characterized in that: operation relates to high temperature in the described the first step, should dress appliances for labor protection before operation, prevents from scalding.
3. blast funnace hot blast stove pipeline technique for rapidly repairing as claimed in claim 1, is characterized in that: for improving the heat-resisting effect of ceramic fiber in described 5th step, and application claims refractoriness is more than or equal to the ceramic fiber containing zirconium matter of 1300 DEG C.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN105400920A (en) * | 2015-11-23 | 2016-03-16 | 南京联合荣大工程材料有限责任公司 | Press-in type repairing method for hot blast heater top heat-resisting lining |
| CN105483307A (en) * | 2015-12-07 | 2016-04-13 | 北京首钢股份有限公司 | Repairing method for flow guiding bars in combustor during hot blast heater repairing |
| CN106949337A (en) * | 2017-03-30 | 2017-07-14 | 中国十九冶集团有限公司 | Method for repairing collapsed liner of hot air pipeline |
| CN107937646A (en) * | 2017-11-03 | 2018-04-20 | 山西太钢不锈钢股份有限公司 | A kind of building method of hot air duct |
| CN108570524A (en) * | 2017-03-08 | 2018-09-25 | 广东韶钢松山股份有限公司 | The blast funnace hot blast stove pipe lining checkout and diagnosis of resistance to material technique |
| 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 |
| CN110527771A (en) * | 2018-05-28 | 2019-12-03 | 广东韶钢松山股份有限公司 | A kind of blast funnace hot blast stove flue flange connection position explosion processing method |
| 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 |
| CN114058760A (en) * | 2021-11-15 | 2022-02-18 | 攀钢集团工程技术有限公司 | Method for quickly replacing local hot air pipeline on hot air pipe of blast furnace |
| CN114804868A (en) * | 2022-04-29 | 2022-07-29 | 吉林电力股份有限公司长春热电分公司 | Preparation method of tungsten trioxide ceramic skeleton crucible |
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| CN105400920A (en) * | 2015-11-23 | 2016-03-16 | 南京联合荣大工程材料有限责任公司 | Press-in type repairing method for hot blast heater top heat-resisting lining |
| CN105483307A (en) * | 2015-12-07 | 2016-04-13 | 北京首钢股份有限公司 | Repairing method for flow guiding bars in combustor during hot blast heater repairing |
| CN105483307B (en) * | 2015-12-07 | 2017-10-03 | 北京首钢股份有限公司 | Burner Inner guide rod restorative procedure in a kind of hot-blast stove repairing |
| 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 |
| 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 |
| 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 |
| CN108570524A (en) * | 2017-03-08 | 2018-09-25 | 广东韶钢松山股份有限公司 | The blast funnace hot blast stove pipe lining checkout and diagnosis of resistance to material technique |
| CN106949337A (en) * | 2017-03-30 | 2017-07-14 | 中国十九冶集团有限公司 | Method for repairing collapsed liner of hot air pipeline |
| 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 |
| CN107937646A (en) * | 2017-11-03 | 2018-04-20 | 山西太钢不锈钢股份有限公司 | A kind of building method of hot air duct |
| CN110527771A (en) * | 2018-05-28 | 2019-12-03 | 广东韶钢松山股份有限公司 | A kind of blast funnace hot blast stove flue flange connection position explosion processing method |
| CN110527771B (en) * | 2018-05-28 | 2021-04-02 | 广东韶钢松山股份有限公司 | Blast furnace hot blast stove flue flange connection part burst treatment method |
| 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 |
| CN114058760A (en) * | 2021-11-15 | 2022-02-18 | 攀钢集团工程技术有限公司 | Method for quickly replacing local hot air pipeline on hot air pipe of blast furnace |
| CN114804868A (en) * | 2022-04-29 | 2022-07-29 | 吉林电力股份有限公司长春热电分公司 | Preparation method of tungsten trioxide ceramic skeleton crucible |
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