CN102912050A - Material-ramming, mud-pressing and anti-freezing method for cooling wall of blast furnace in winter overhaul - Google Patents
Material-ramming, mud-pressing and anti-freezing method for cooling wall of blast furnace in winter overhaul Download PDFInfo
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- CN102912050A CN102912050A CN2012104293356A CN201210429335A CN102912050A CN 102912050 A CN102912050 A CN 102912050A CN 2012104293356 A CN2012104293356 A CN 2012104293356A CN 201210429335 A CN201210429335 A CN 201210429335A CN 102912050 A CN102912050 A CN 102912050A
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- blast furnace
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- cooling stave
- cooling
- shell
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- 238000001816 cooling Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007710 freezing Methods 0.000 title claims abstract description 10
- 238000003825 pressing Methods 0.000 title abstract 4
- 239000000463 material Substances 0.000 claims abstract description 34
- 239000011819 refractory material Substances 0.000 claims abstract description 14
- 238000009413 insulation Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 4
- 230000008014 freezing Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010792 warming Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract 1
- 230000005484 gravity Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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- Blast Furnaces (AREA)
Abstract
The invention relates to a material-ramming, mud-pressing and anti-freezing method for a cooling wall of a blast furnace in winter overhaul, which comprises the following steps of: 1) using a hot blast stove to carry out air supply and heat preservation in the blast furnace; 2) laying a heat-insulating layer outside a blast furnace shell, and erecting a heat-insulating shed for heat insulation; 3) measuring the temperature of the material ramming position of the cooling wall gap by using a temperature measuring gun, and determining the temperature to be above zero so as to construct; 4) starting to bake the blast furnace; 5) comprehensively detecting the temperature of the blast furnace shell by using a temperature measuring gun, and starting to prepare for cooling wall grouting when the temperature of the blast furnace shell is more than 6 ℃; 6) determining a mud jacking position between the cooling wall and the blast furnace shell; 7) firstly, welding a pressing hole short pipe at a grouting part, and then drilling holes by adopting a drilling machine; 8) and pressing the refractory material between the blast furnace shell and the cooling wall through the short pipe. Compared with the prior art, the invention has the beneficial effects that: the service life of the blast furnace is prolonged, the quality of the blast furnace in winter construction overhaul is ensured, the normal production operation of the blast furnace after the furnace is opened is promoted, and the economic benefit of enterprises is improved.
Description
Technical field
The present invention relates to the blast-furnace smelting field, particularly a kind of blast furnace overhaul in winter cooling stave is smash material mud jacking means to prevent freezing.
Background technology
Because the design defect of blast furnace itself, the selection of the anti-material in cupola well position, the reasons such as cupola well zone cooling power deficiency, each position temperature of blast furnace raises very fast, even generation hearth breakout accident, so taked increase cupola well water supply straight tube to increase cooling water inflow, newly-increased cupola well heat flow rate per unit area detects, use the measures such as schreyerite maintenance, and change according to the temperature of the furnace hearth field and to adjust accordingly, but along with the stove labour time lengthens, the situation that abnormal erosion appears in the cupola well zone progressively increases the weight of, showing as iron mouth cupola well zone heat flow rate per unit area continues to raise, surpass warning value, blast furnace is forced to take to reduce combustion intensity, stop oxygen enrichment, the operation of stifled air port, until the measures such as the cool stove of damping down, keep reluctantly the low-level production of blast furnace, for thoroughly eliminating the safety in production hidden danger in blast furnace hearth zone, must carry out thorough overhaul to blast furnace, but the overhaul of blast furnace is never constructed in winter, because cold weather, the gravity flow pouring material that slit between material and cooling stave and the shell of blast furnace is smash at cooling stave and cooling wall joint place is constructed under cold snap and is easily frozen, make joint filling place smash the material and the mud jacking refractory materials freeze to go bad, lose original character of refractory materials, affect the normal production run of blast furnace and blast furnace campaign after the blow-on, therefore, blast furnace also will continue keeping low-level production, cause the performance of enterprises to reduce, exist simultaneously potential safety hazard.
Summary of the invention
The purpose of this invention is to provide a kind ofly during blast furnace overhaul in winter, prevent that gravity flow pouring material, joint filling place from smashing material and the mud jacking refractory materials method freezing to go bad, effectively raise blast furnace campaign and production efficiency.
For achieving the above object, the present invention realizes by the following technical solutions:
A kind of blast furnace overhaul in winter cooling stave is smash material mud jacking means to prevent freezing, may further comprise the steps:
1) with hotblast stove to the insulation of blowing in the blast furnace, satisfy the cooling stave slit and smash needed temperature of when material, guarantee to smash the material material and do not endure cold rotten;
2) lay thermal insulation layer last furnace shell is outside, and set up warming canopy and be incubated, guarantee that cold gas stream does not enter or enters less in the State of Blast Furnace;
3) with temperature-measuring gun the material place is smash in the cooling stave slit and carry out thermometric, confirm to construct on the zero temperature, if temperature does not reach and smashes the needed temperature of material and stop work immediately, strengthen little Combustion of Hot Air Furnace, to improve temperature in the stove;
4) when blast furnace hearth build by laying bricks or stones complete, cooling stave installs smashes material when complete with the cooling stave slit, begins to toast blast furnace;
5) with temperature-measuring gun complete detection shell of blast furnace temperature, treat that beginning to carry out the cooling stave mud jacking more than stove skin temperature 6 degree prepares;
6) determine mud jacking position between cooling stave and the shell of blast furnace, four cooling plate central positions that the mud jacking position should be between the 6th in blast furnace and the 7th cooling stave;
7) when blast furnace staying, at first welding is pressed into the hole short tube at the mud jacking position, then adopts the drilling machine perforate, and opening diameter is generally Φ 28mm or Φ 35mm;
8) by short tube refractory materials is pressed between last furnace shell and the cooling stave.
Present method also is applicable to following situation: after 1) the cooling plate flange portion is changed; 2) the wind passage is altered at the cooling stave back; 3) installation of micro cooler; 4) installation in air port; 5) lining of shaft is local safeguards.
Compared with prior art, the invention has the beneficial effects as follows:
A kind of blast furnace overhaul in winter cooling stave is smash material mud jacking means to prevent freezing, prevented that effectively cooling stave and cooling wall joint place from smashing between material, cooling stave and the shell of blast furnace slit gravity flow pouring material and refractory materials freezes to go bad, prevented that refractory materials from losing original character, prolonged the work-ing life of blast furnace, guaranteed blast furnace winter construction Overhaul Quality, impel the normal production run of blast furnace after the blow-on, improved the economic benefit of enterprise.
Embodiment
The below further specifies the specific embodiment of the present invention:
A kind of blast furnace of the present invention overhaul in winter cooling stave is smash material mud jacking means to prevent freezing, may further comprise the steps:
1) with hotblast stove to the insulation of blowing in the blast furnace, satisfy the cooling stave slit and smash needed temperature of when material, guarantee to smash the material material and do not endure cold rotten;
2) lay thermal insulation layer last furnace shell is outside, and set up warming canopy and be incubated, guarantee that cold gas stream does not enter or enters less in the State of Blast Furnace;
3) with temperature-measuring gun the material place is smash in the cooling stave slit and carry out thermometric, confirm to construct on the zero temperature, if temperature does not reach and smashes the needed temperature of material and stop work immediately, strengthen little Combustion of Hot Air Furnace, to improve temperature in the stove;
4) when blast furnace hearth build by laying bricks or stones complete, cooling stave installs smashes material when complete with the cooling stave slit, begins to toast blast furnace;
5) with temperature-measuring gun complete detection shell of blast furnace temperature, treat that beginning to carry out the cooling stave mud jacking more than stove skin temperature 6 degree prepares;
6) determine mud jacking position between cooling stave and the shell of blast furnace, four cooling plate central positions that the mud jacking position should be between the 6th in blast furnace and the 7th cooling stave;
7) when blast furnace staying, at first welding is pressed into the hole short tube at the mud jacking position, then adopts the drilling machine perforate, and opening diameter is generally Φ 28mm or Φ 35mm;
8) by short tube refractory materials is pressed between last furnace shell and the cooling stave.
Present method also is applicable to following situation:
1) after the cooling plate flange portion is changed: after replacing is leaked out at blast furnace cooling board generation back, there is the gap around the blast furnace cooling board, at this moment need to utilize this method that specific refractory materials is inserted the gap, improve the cooling performance of blast furnace cooling board, owing to being take filling blast furnace lining gap as main purpose, be only applicable to cool off board-like blast furnace.
2) the wind passage is altered at the cooling stave back: cooling stave is installed on the last furnace shell inboard, exist certain gap between cooling stave after the installation and the furnace shell, need generally speaking to utilize design pre-opened hole on the furnace shell to be pressed into refractory materials and carry out filling, if these gaps still exist after the normal production of blast furnace, to form at the cooling stave back side and alter the wind passage, cause furnace shell rubescent, at this moment need to utilize former pre-opened hole or new boring, with this method specific refractory materials is fills up to gap, cooling stave back, wind is altered at the back of minimizing and elimination cooling stave.
3) installation of micro cooler: when being installed in the cooling apparatus on the blast furnace because design is not enough, produce the reasons such as load increasing or cooling apparatus breakage, when causing the comprehensive cooling intensity of body of heater not adapt to furnace heat load, the furnace lining aggravation of deteriorating, even furnace shell is rubescent, directly affect the work-ing life of body of heater, at this moment relatively effective means is installed micro cooler at body of heater exactly, to replenish the cooling intensity of body of heater, at this moment the hole that can on furnace shell, bore when micro cooler is installed, utilize this method that the refractory materials with lining repairing performance is pressed in the stove, reach the purpose of fettling.
4) installation in air port: owing to considering the expansion of furnace lining, in the installation process of air port, generally all be provided with the expansion clearance, and filling buffering filler, at blast oven with after going into operation, if the expansion clearance of these reservations does not fully absorb, then may become the passage of coal gas of high temperature, for these passages of shutoff, need to adopt this method that specific refractory materials is pressed in tuyere big sleeve or the middle cover, reach the purpose of shutoff passage.
5) lining of shaft is local safeguards: behind the blast furnace life-time service, be subjected to the wearing and tearing of furnace charge, the erosion of chemistry and the effect of thermal stresses, the continuous attenuate of blast furnace lining, local furnace shell is rubescent even be directly exposed in the furnace charge when serious, maintenance for this locality, utilizing this method maintenance is a kind of reasonable mode, be that so-called being pressed into made lining, this press mode is divided into common being pressed into hard and is pressed into, it should be noted that, a precondition need to be arranged when utilizing this press mode operation: being pressed into the position has furnace charge to exist, and not yet melting of furnace charge.
Claims (2)
1. blast furnace overhaul in a winter cooling stave is smash material mud jacking means to prevent freezing, it is characterized in that, may further comprise the steps:
1) with hotblast stove to the insulation of blowing in the blast furnace, satisfy the cooling stave slit and smash needed temperature of when material, guarantee to smash the material material and do not endure cold rotten;
2) lay thermal insulation layer last furnace shell is outside, and set up warming canopy and be incubated, guarantee that cold gas stream does not enter or enters less in the State of Blast Furnace;
3) with temperature-measuring gun the material place is smash in the cooling stave slit and carry out thermometric, confirm to construct on the zero temperature, if temperature does not reach and smashes the needed temperature of material and stop work immediately, strengthen little Combustion of Hot Air Furnace, to improve temperature in the stove;
4) when blast furnace hearth build by laying bricks or stones complete, cooling stave installs smashes material when complete with the cooling stave slit, begins to toast blast furnace;
5) with temperature-measuring gun complete detection shell of blast furnace temperature, treat that beginning to carry out the cooling stave mud jacking more than stove skin temperature 6 degree prepares;
6) determine mud jacking position between cooling stave and the shell of blast furnace, four cooling plate central positions that the mud jacking position should be between the 6th in blast furnace and the 7th cooling stave;
7) when blast furnace staying, at first welding is pressed into the hole short tube at the mud jacking position, then adopts the drilling machine perforate, and opening diameter is Φ 28mm or Φ 35mm;
8) by short tube refractory materials is pressed between last furnace shell and the cooling stave.
2. a kind of blast furnace overhaul in winter cooling stave according to claim 1 is smash material mud jacking means to prevent freezing, it is characterized in that, present method also is applicable to following situation: after 1) the cooling plate flange portion is changed; 2) the wind passage is altered at the cooling stave back; 3) installation of micro cooler; 4) installation in air port; 5) lining of shaft is local safeguards.
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CN2012104293356A CN102912050A (en) | 2012-10-30 | 2012-10-30 | Material-ramming, mud-pressing and anti-freezing method for cooling wall of blast furnace in winter overhaul |
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CN2012104293356A CN102912050A (en) | 2012-10-30 | 2012-10-30 | Material-ramming, mud-pressing and anti-freezing method for cooling wall of blast furnace in winter overhaul |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105452491A (en) * | 2013-08-06 | 2016-03-30 | 新日铁住金工程技术株式会社 | Hot-blast stove construction method |
CN110527759A (en) * | 2018-06-22 | 2019-12-03 | 广东韶钢松山股份有限公司 | A method of prevent blast furnace taphole from leaking coal gas |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11229011A (en) * | 1998-02-16 | 1999-08-24 | Kawasaki Steel Corp | Method for repairing furnace body of blast furnace |
JP2006003040A (en) * | 2004-06-21 | 2006-01-05 | Hirohata Furnace Co Ltd | Joint structure in furnace inner wall |
CN101289698A (en) * | 2008-06-06 | 2008-10-22 | 武汉宏程冶金材料有限公司 | Blast furnace pressing-in grouting and lining-making construction method |
CN101851692A (en) * | 2010-06-02 | 2010-10-06 | 河北省首钢迁安钢铁有限责任公司 | Construction method for curing non-aqueous slurry at normal temperature in blast furnace |
-
2012
- 2012-10-30 CN CN2012104293356A patent/CN102912050A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11229011A (en) * | 1998-02-16 | 1999-08-24 | Kawasaki Steel Corp | Method for repairing furnace body of blast furnace |
JP2006003040A (en) * | 2004-06-21 | 2006-01-05 | Hirohata Furnace Co Ltd | Joint structure in furnace inner wall |
CN101289698A (en) * | 2008-06-06 | 2008-10-22 | 武汉宏程冶金材料有限公司 | Blast furnace pressing-in grouting and lining-making construction method |
CN101851692A (en) * | 2010-06-02 | 2010-10-06 | 河北省首钢迁安钢铁有限责任公司 | Construction method for curing non-aqueous slurry at normal temperature in blast furnace |
Non-Patent Citations (3)
Title |
---|
中国金属学会: "《2002年全国炼铁生产技术会议暨炼铁年会文集》", 31 December 2002 * |
郝运中 等: "《低温粗缝糊的研制及在大型高炉上的应用》", 《炼铁》 * |
陈怡元: "《高炉无水压浆造衬技术的应用》", 《山东冶金》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105452491A (en) * | 2013-08-06 | 2016-03-30 | 新日铁住金工程技术株式会社 | Hot-blast stove construction method |
CN110527759A (en) * | 2018-06-22 | 2019-12-03 | 广东韶钢松山股份有限公司 | A method of prevent blast furnace taphole from leaking coal gas |
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Application publication date: 20130206 |