CN101899545A - On-line changing method of hot blast main duct of blast furnace - Google Patents
On-line changing method of hot blast main duct of blast furnace Download PDFInfo
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- CN101899545A CN101899545A CN200910052153XA CN200910052153A CN101899545A CN 101899545 A CN101899545 A CN 101899545A CN 200910052153X A CN200910052153X A CN 200910052153XA CN 200910052153 A CN200910052153 A CN 200910052153A CN 101899545 A CN101899545 A CN 101899545A
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Abstract
The invention relates to an on-line changing method of a hot blast main duct of a blast furnace, belonging to the field of construction of a pipeline system used for gas distribution in a brick-built hot blast furnace. The on-line changing method of the hot blast main duct of the blast furnace sequentially comprises the following steps after the hot blast furnace stops producing and each energy medium pipeline is closed: disassembling the hot blast main duct; plugging pipeline openings positioned on both ends of a section which is not disassembled; building the three-way part of the hot blast main duct on the ground; lifting the hot blast main duct; building the hot blast main duct on line; and disassembling a heat-insulation plugging wall. The invention has short construction period, low cost and little influence on production.
Description
Technical field
The present invention relates to be used for the tubing system construction field that gas distributes in the brick hotblast stove, be specially a kind of on-line changing method of hot blast main duct of blast furnace.
Background technology
Hot air duct is to be used for sending into pipeline in the State of Blast Furnace from the effusive hot blast of hotblast stove through hot-blast main, bustle pipe, blowpipe.Hot blast main duct of blast furnace is the main gas passage that connects blast furnace and hotblast stove, and material is a steel pipe, and liner all adopts fire-resistant material heat insulation, and hot blast main duct of blast furnace connects hot blast manifold with three and connects several hotblast stoves arranged side by side simultaneously.Three ports connect the hot blast valve of the hot blast manifold outlet of hotblast stove.The two ends that connect one section house steward of each hotblast stove on the hot-blast main connect telescopic joint.The hot-blast main is owing to the hot-blast main who is in for a long time under the hot operation state, and local pole is subject to destruction, and it shows the shell gross distortion, the breakage of internal refractory brick.When keeping in repair, because there is bigger potential safety hazard in working aloft; And toxic gas harm is serious, can not local online dismounting overhaul always, and traditional mode is that whole hotblast stoves stop production at present, and whole hot-blast main removes all replacings of back.Production is affected like this, and owner's loss is bigger.
Summary of the invention
In order to overcome the defective of prior art, provide a kind of duration short, cost is low, hot-blast main's method for maintaining of little impact on production, the invention discloses a kind of on-line changing method of hot blast main duct of blast furnace.
The present invention reaches goal of the invention by following technical solution:
A kind of on-line changing method of hot blast main duct of blast furnace, stop production and each energy medium pipeline carries out after having closed as follows successively at hotblast stove: hot-blast main's threeway position → lifting hot-blast main → online hot-blast main of building by laying bricks or stones → remove heat insulation block wall is built on the pipeline opening → ground of removing hot-blast main → shutoff not removed segment two ends by laying bricks or stones, it is characterized in that:
When removing the hot-blast main, earlier make in the hot-blast main temperature reduce to 200 ℃～300 ℃ with water cooling hot-blast main to be removed, then remove hot blast valve, removing hot blast then is responsible for, the dismounting that hot blast is responsible for is divided into dismounting pipeline machinery and removes two steps of refractory materials and carry out, and guarantees that temperature remains between 200 ℃～300 ℃ in the hot-blast main during dismounting hot-blast main.
During the pipeline opening at shutoff not removed segment two ends, earlier two fractures that form behind the hot-blast main have been removed with high temperature resistant woven asbesto shutoff, then piecemeal build heat insulation prefabricated section by laying bricks or stones and in fracture block-by-block splicing make it to become the circular heat insulation block wall that a diameter and hot-blast main's fracture internal diameter equate, and with the sealing of two fractures, the draw ring of fixed-direction outside fracture all on every block of heat insulation prefabricated section.
When hot-blast main's threeway position is built on ground by laying bricks or stones, build the lower half circle bottom masonry of hot-blast main's three port modular tiles earlier by laying bricks or stones on ground, install the upper semi-circle donor that the arch tire is built the hot-blast main by laying bricks or stones again.
Lifting is during the hot-blast main, the group of implementing hot-blast main's three port modular tiles and left hot blast manifold and right hot blast manifold earlier on ground to and spraying operation, adopt crane to carry out integral hoisting then.
Online when building the hot-blast main by laying bricks or stones, a hole respectively cuts at the left end of hot-blast main's left hot blast manifold and the right-hand member of right hot blast manifold in elder generation, pass in and out and carry material passage as personnel with hole, begin to build by laying bricks or stones the hot-blast main subsequently, build lower half circle when building by laying bricks or stones earlier by laying bricks or stones and build upper semi-circle again by laying bricks or stones, after lower half circle has been built by laying bricks or stones, horizontal positioned one back up pad in lower half circle, and on back up pad, prop the upper semi-circle of thin bamboo strips used for weaving sheet fixedly to build by laying bricks or stones, the outer successively from the inside to the outside one deck refractory brick of hot-blast main, two-layer insulating brick and one deck heat resisting coating.
When removing heat insulation block wall, earlier that the inner cleaning of hot-blast main is clean, going here and there wireline on the draw ring of heat insulation prefabricated section by hot-blast main's three ports, respectively the heat insulation prefabricated section block-by-block at two ends is pulled out, connect whole hot-blast main.
Described on-line changing method of hot blast main duct of blast furnace is characterized in that: adopt crane to carry out integral hoisting during the lifting hot-blast main, the lifting point is 2～10.
Online when building the hot-blast main by laying bricks or stones, at the left end of hot-blast main's left hot blast manifold and the hole that right-hand member cut of right hot blast manifold, from being 400mm～600mm, hole diameter is 900mm～1100mm from the pipe ends track pitch for it.
When removing heat insulation block wall, the wireline of string on heat insulation prefabricated section draw ring selected the wireline of Φ 10mm for use, and the order of building heat insulation prefabricated section when drawing the pipeline opening at the order of heat insulation prefabricated section and shutoff not removed segment two ends by laying bricks or stones is identical.
The invention has the beneficial effects as follows: the duration is short, and cost is low, little impact on production.Solved the technical barrier of the online local replacing of hot-blast main.Changed traditional all the time whole hotblast stoves are stopped production after, can carry out the replacing engineering of whole hot air duct.Duration and cost have been saved greatly.
Description of drawings
Fig. 1 is the synoptic diagram that hot blast main duct of blast furnace is changed section among the present invention;
Fig. 2 is the synoptic diagram that splices heat insulation block wall among the present invention in hot-blast main's fracture;
Fig. 3 be among the present invention the ground group to the synoptic diagram of hot-blast main's three port modular tiles, left hot blast manifold and right hot blast manifold;
Fig. 4 is the synoptic diagram of building the hot-blast main among the present invention by laying bricks or stones.
Embodiment
Below further specify the present invention by specific embodiment.
Embodiment 1
As shown in Figure 1, hotblast stove 11, hotblast stove 12, hotblast stove 13 and hotblast stove 14 are respectively by hot blast valve 21, hot blast valve 22, hot blast valve 23 and hot blast valve 24 are connected on the hot-blast main 31, now change with 311 sections needs of hot-blast main of hotblast stove 12 junctions, on 311 sections of hot-blast mains' to be removed both sides one telescopic joint 41 is installed respectively, adopt on-line changing method of hot blast main duct of blast furnace, stop production and each energy medium pipeline carries out after having closed as follows successively at hotblast stove: hot-blast main's threeway position → lifting hot-blast main → online hot-blast main of building by laying bricks or stones → remove heat insulation block wall is built on the pipeline opening → ground of removing hot-blast main → shutoff not removed segment two ends by laying bricks or stones, and concrete steps are:
When removing the hot-blast main, earlier make in the hot-blast main temperature reduce to 200 ℃～300 ℃ with water cooling hot-blast main to be removed, then remove hot blast valve, removing hot blast then is responsible for, the dismounting that hot blast is responsible for is divided into dismounting pipeline machinery and removes two steps of refractory materials and carry out, and guarantees that temperature remains between 200 ℃～300 ℃ in the hot-blast main during dismounting hot-blast main.
After removing the hot-blast main, refractory materials meeting Yin Wendu reduces meeting and changes chemical property in the interior part residue of the pipe pipe, causes to damage and loses efficacy.And the high temperature of incision position and coal gas environment can have influence on the healthy and safe of workmen, therefore, determine temperature in the pipe at any time, and refractory brick is removed personnel will dress high-temperature protective clothes in case high temperature is hurted sb.'s feelings.In order to keep temperature in blast furnace and the heating duct, the pipeline opening at the shutoff not removed segment two ends that must will begin in a minute behind the dismounting hot-blast main.During the pipeline opening at shutoff not removed segment two ends, earlier two fractures that form behind the hot-blast main have been removed with high temperature resistant woven asbesto shutoff, building prefabricated section 51 by laying bricks or stones from the position piecemeal of fracture limit 200mm then, and the block-by-block splicing makes it to become a diameter and the equal circular heat insulation block wall of hot-blast main's fracture internal diameter in fracture, as shown in Figure 2, and with the sealing of two fractures, the limit is built the prefabricated section limit by laying bricks or stones and is promoted high temperature resistant woven asbesto during shutoff, prevents that high temperature hot gas from hurting sb.'s feelings.Fill with cellucotton in space between prefabricated section and the hot-blast main's tube wall, the draw ring of fixed-direction outside fracture all on every block of heat insulation prefabricated section.
When hot-blast main's threeway position is built on ground by laying bricks or stones, build the lower half circle bottom masonry of hot-blast main's three port modular tiles earlier by laying bricks or stones on ground, install the upper semi-circle donor that the arch tire is built the hot-blast main by laying bricks or stones again.
During the lifting hot-blast main, the group of implementing earlier hot-blast main's three port modular tiles 61 and left hot blast manifold 62 and right hot blast manifold 63 on ground to and spraying operation, as shown in Figure 3, adopt crane to carry out integral hoisting then, adopt crane to carry out integral hoisting during lifting, the lifting point is 10.
Online when building the hot-blast main by laying bricks or stones, a φ 1000mm hole respectively respectively cuts at the left end of hot-blast main's left hot blast manifold and the right-hand member of right hot blast manifold in elder generation apart from mouth of pipe 500mm place, pass in and out and carry material passage as personnel with hole, close gas valve subsequently, the operative employee puts on the high temperature protection clothing, put on high temperature cover and smoke mask, wear the coal gas detector, through confirm errorless after, begin to build by laying bricks or stones the hot-blast main, as shown in Figure 4, build lower half circle when building by laying bricks or stones earlier by laying bricks or stones and build upper semi-circle again by laying bricks or stones, after lower half circle has been built by laying bricks or stones, horizontal positioned one back up pad 2 in lower half circle, and on back up pad 2, prop the upper semi-circle of thin bamboo strips used for weaving sheet 1 fixedly to build by laying bricks or stones, the outer successively from the inside to the outside one deck refractory brick 3 of hot-blast main, two-layer insulating brick 4 and one deck heat resisting coating 5.The online hot-blast main of building by laying bricks or stones belongs to high-risk operations, need overcome the dangerous matter sources of high temperature and coal gas.The building construction personnel must be the 3 people operations of entering simultaneously during operation inside, and the activity duration can not be above 30 minutes.
When removing heat insulation block wall, earlier that the inner cleaning of hot-blast main is clean, use the wire rope rope of φ 10mm on the draw ring of heat insulation prefabricated section by hot-blast main's three ports, after guaranteeing operator's general evacuation pipeline, respectively the heat insulation prefabricated section block-by-block at two ends is pulled out, the order of building heat insulation prefabricated section when drawing the pipeline opening at the order of heat insulation prefabricated section and shutoff not removed segment two ends by laying bricks or stones is identical, to connect whole hot-blast main, remove the block wall on hotblast stove 13 limits earlier, tear the block wall on hotblast stove 11 limits again open.
Claims (2)
1. on-line changing method of hot blast main duct of blast furnace, stop production and each energy medium pipeline carries out after having closed as follows successively at hotblast stove: hot-blast main's threeway position → lifting hot-blast main → online hot-blast main of building by laying bricks or stones → remove heat insulation block wall is built on the pipeline opening → ground of removing hot-blast main → shutoff not removed segment two ends by laying bricks or stones, it is characterized in that:
When removing the hot-blast main, earlier make in the hot-blast main temperature reduce to 200 ℃～300 ℃ with water cooling hot-blast main to be removed, then remove hot blast valve, removing hot blast then is responsible for, the dismounting that hot blast is responsible for is divided into dismounting pipeline machinery and removes two steps of refractory materials and carry out, and guarantees that temperature remains between 200 ℃～300 ℃ in the hot-blast main during dismounting hot-blast main;
During the pipeline opening at shutoff not removed segment two ends, earlier two fractures that form behind the hot-blast main have been removed with high temperature resistant woven asbesto shutoff, then piecemeal build heat insulation prefabricated section by laying bricks or stones and in fracture block-by-block splicing make it to become the circular heat insulation block wall that a diameter and hot-blast main's fracture internal diameter equate, and with the sealing of two fractures, the draw ring of fixed-direction outside fracture all on every block of heat insulation prefabricated section;
When hot-blast main's threeway position is built on ground by laying bricks or stones, build the lower half circle bottom masonry of hot-blast main's three port modular tiles earlier by laying bricks or stones on ground, install the upper semi-circle donor that the arch tire is built the hot-blast main by laying bricks or stones again;
Lifting is during the hot-blast main, the group of implementing hot-blast main's three port modular tiles and left hot blast manifold and right hot blast manifold earlier on ground to and spraying operation, adopt crane to carry out integral hoisting then;
Online when building the hot-blast main by laying bricks or stones, a hole respectively cuts at the left end of hot-blast main's left hot blast manifold and the right-hand member of right hot blast manifold in elder generation, pass in and out and carry material passage as personnel with hole, begin to build by laying bricks or stones the hot-blast main subsequently, build lower half circle when building by laying bricks or stones earlier by laying bricks or stones and build upper semi-circle again by laying bricks or stones, after lower half circle has been built by laying bricks or stones, horizontal positioned one back up pad (2) in lower half circle, and on back up pad (2), prop the upper semi-circle of thin bamboo strips used for weaving sheet (1) fixedly to build by laying bricks or stones, the outer successively from the inside to the outside one deck refractory brick of hot-blast main (3), two-layer insulating brick (4) and one deck heat resisting coating (5);
When removing heat insulation block wall, earlier that the inner cleaning of hot-blast main is clean, going here and there wireline on the draw ring of heat insulation prefabricated section by hot-blast main's three ports, respectively the heat insulation prefabricated section block-by-block at two ends is pulled out, connect whole hot-blast main.
2. on-line changing method of hot blast main duct of blast furnace as claimed in claim 1 is characterized in that: adopt crane to carry out integral hoisting during the lifting hot-blast main, the lifting point is 2～10;
Online when building the hot-blast main by laying bricks or stones, at the left end of hot-blast main's left hot blast manifold and the hole that right-hand member cut of right hot blast manifold, from being 400mm～600mm, hole diameter is 900mm～1100mm from the pipe ends track pitch for it;
When removing heat insulation block wall, the wireline of string on heat insulation prefabricated section draw ring selected the wireline of Φ 10mm for use, and the order of building heat insulation prefabricated section when drawing the pipeline opening at the order of heat insulation prefabricated section and shutoff not removed segment two ends by laying bricks or stones is identical.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910052153XA CN101899545B (en) | 2009-05-27 | 2009-05-27 | On-line changing method of hot blast main duct of blast furnace |
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| CN200910052153XA CN101899545B (en) | 2009-05-27 | 2009-05-27 | On-line changing method of hot blast main duct of blast furnace |
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| CN101899545A true CN101899545A (en) | 2010-12-01 |
| CN101899545B CN101899545B (en) | 2012-08-15 |
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Cited By (11)
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| CN102206722A (en) * | 2011-05-11 | 2011-10-05 | 南通宝钢钢铁有限公司 | Quick repair method for fallen hot air pipeline refractory |
| 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 |
| CN103361472A (en) * | 2013-06-28 | 2013-10-23 | 首钢总公司 | Method for plugging leakage point of annealing furnace |
| CN104946835A (en) * | 2015-07-28 | 2015-09-30 | 四川省达州钢铁集团有限责任公司 | Blast furnace hot-blast valve maintenance platform |
| CN105479098A (en) * | 2014-10-10 | 2016-04-13 | 五冶集团上海有限公司 | Online dismounting method for large-scale gas pipeline |
| 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 |
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| CN114774607A (en) * | 2022-04-24 | 2022-07-22 | 北京首钢建设集团有限公司 | Hot blast stove bottom structure and welding method thereof |
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| CN102206722A (en) * | 2011-05-11 | 2011-10-05 | 南通宝钢钢铁有限公司 | Quick repair method for fallen hot air pipeline refractory |
| 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 |
| CN103361472A (en) * | 2013-06-28 | 2013-10-23 | 首钢总公司 | Method for plugging leakage point of annealing furnace |
| CN105479098A (en) * | 2014-10-10 | 2016-04-13 | 五冶集团上海有限公司 | Online dismounting method for large-scale gas pipeline |
| CN105479098B (en) * | 2014-10-10 | 2018-02-16 | 五冶集团上海有限公司 | A kind of online method for dismounting of large-sized gas pipeline |
| CN104946835A (en) * | 2015-07-28 | 2015-09-30 | 四川省达州钢铁集团有限责任公司 | Blast furnace hot-blast valve maintenance platform |
| CN110273038B (en) * | 2018-03-14 | 2021-06-25 | 广东韶钢松山股份有限公司 | Method for replacing short pipe of hot air pipeline corrugated compensator |
| CN110273038A (en) * | 2018-03-14 | 2019-09-24 | 广东韶钢松山股份有限公司 | A kind of hot air duct FlexbleJoint short tube replacing options |
| CN110628977A (en) * | 2018-10-20 | 2019-12-31 | 广东韶钢松山股份有限公司 | Optimization method for solving problem of insufficient backflow and air draft of blast furnace hot air pipeline |
| CN110628977B (en) * | 2018-10-20 | 2021-08-31 | 广东韶钢松山股份有限公司 | Optimization method for solving problem of insufficient backflow and air draft of blast furnace hot air pipeline |
| 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 |
| 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 |
| CN110953482A (en) * | 2019-12-16 | 2020-04-03 | 云南云铝海鑫铝业有限公司 | Air pipe system for maintenance of aluminum electrolysis workshop without stopping air |
| CN114774607A (en) * | 2022-04-24 | 2022-07-22 | 北京首钢建设集团有限公司 | Hot blast stove bottom structure and welding method thereof |
| CN114774607B (en) * | 2022-04-24 | 2023-09-15 | 北京首钢建设集团有限公司 | Furnace bottom structure of hot blast furnace and welding method thereof |
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| CN101899545B (en) | 2012-08-15 |
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