CN102851422B - Blast furnace tuyere combination firebrick repairing method - Google Patents
Blast furnace tuyere combination firebrick repairing method Download PDFInfo
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- CN102851422B CN102851422B CN201210232254.7A CN201210232254A CN102851422B CN 102851422 B CN102851422 B CN 102851422B CN 201210232254 A CN201210232254 A CN 201210232254A CN 102851422 B CN102851422 B CN 102851422B
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Abstract
The invention discloses a blast furnace tuyere combination firebrick repairing method, which comprises the following steps: (1) dismounting an upper damaged part of a tuyere combination firebrick to expose a tuyere sleeve; (2) fixing an arc-shaped support mold above the tuyere sleeve; (3) performing high-pressure pumping of mixed injection materials above the arc-shaped support mold, performing injection manually by a spray gun to obtain a model with a desired structure so as to form an injection material pile; (4) after injection, standing for 24 hours, when the injection materials reach a solidified state, taking out the arc-shaped support mold, filling buffer slurry into gaps between the tuyere sleeve and the injection material pile. The blast furnace tuyere combination firebrick repairing method provided by the invention is simple in construction condition, high in construction speed, and environment-friendly in construction; a desired structure shape can be constructed according to the requirements; thermal shock, high temperature erosion and mechanical scouring caused by frequent temperature change in the furnace can be resisted during the production process.
Description
Technical field
The present invention relates to blast furnace lining damage revamping technical field, particularly a kind of method of Combination Firebrick for BF Tuyere Rapid-Repair.
Background technology
The effect of Combination Firebrick for BF Tuyere mainly protects tuyere case, supports air port with upper furnace body cooling stave protection tile; Simultaneously after protection tile progressively corrodes and peels off, support slag crust and residual brick that cooling stave surface formed.In iron-making production, the environment in region, air port is the most severe and complicated, and tuyere combined brick is subject to alkali-metal erosion, and constantly washing away of high-temperature coal air-flow, slag molten iron is thinning gradually, and particularly under gravity, its top breakage is even more serious.After tuyere combined brick is thinning, the type of furnace changes, slag crust bad stability, and the initial gas flow distribution of blast furnace is affected, thus affects the stable smooth operation of blast furnace.Simultaneously because tuyere combined brick thinning, make tuyere case out exposed, exacerbate high temperature erosion and the mechanical wear of tuyere case, reduce work-ing life, changing tuyere case frequently makes unplanned furnace outage time extend, and affects blast furnace iron output, causes serious financial loss.
After current tuyere combined brick damages, the best way is that the old modular tile in top removing well damage is built by laying bricks or stones again, but Combination nova brick fabrication cycle and to build the time by laying bricks or stones all very long, (modular tile is larger for construction organization difficulty, can not enter in blast furnace from air port), the old modular tile in bottom is also imperfect simultaneously, and masonry quality can not ensure, it is unpractical for therefore again building Combination nova brick by laying bricks or stones; If adopt semidrying spraying to repair, density and the coating thickness of spray material all do not reach requirement, spray material and residual brick yet undesirable in conjunction with effect, are namely etched soon, peel off, do not reach result of use after repairing; If adopt mould material to repair, density and thickness all can reach requirement, but mould material mobility is comparatively large, difficult forming, and making mold too wastes time and energy.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind ofly to repair fast, Combination Firebrick for BF Tuyere method for repairing and mending that repairing quality is high.
For solving the problems of the technologies described above, the invention provides a kind of Combination Firebrick for BF Tuyere method for repairing and mending, comprising following step:
1. remove tuyere combined brick top broken parts, expose tuyere case;
2. above tuyere case, curved support mold is fixed;
3. above curved support mold, spray jetting material forms spray stockpile;
4. take out curved support mold, the gap filling between tuyere case and spray stockpile cushions mud.
Further, described jetting material is the High-Alumina jetting material of silicon carbide-containing, and add water ratio 3%-7%, density 2.8-3.0g/cm.
Further, described spray jetting material is that the jetting material mixed is adopted high pressure pumping, manually holds spray gun and carries out spray.
Further, the method for described formation spray stockpile at the uniform velocity moves spray gun, and make jetting material progressively pile high heap thick, structural shape spray moulding on demand, solidifies rear formation spray stockpile.
Further, described taking-up curved support mold, when described spray stockpile reaches curdled appearance, is taken out by curved support mold after complete standing 24 hours in spray.
Combination Firebrick for BF Tuyere method for repairing and mending provided by the invention, speed of application is fast, and rebound rate is low, fast drying, and execution conditions are simple, and construction environment is friendly; To construct out as required required structural shape, thermal shock resistance, high temperature erosion and mechanical erosion that in-furnace temperature frequent variations produces can be resisted in process of production.
Accompanying drawing explanation
The schematic diagram of the Combination Firebrick for BF Tuyere that Fig. 1 provides for the embodiment of the present invention.
The curved support mold scheme of installation that Fig. 2 provides for the embodiment of the present invention.
The spray construction schematic diagram of the Combination Firebrick for BF Tuyere method for repairing and mending that Fig. 3 provides for the embodiment of the present invention.
Embodiment
A kind of Combination Firebrick for BF Tuyere method for repairing and mending that the embodiment of the present invention provides, comprises following step:
1. remove tuyere combined brick 1 top broken parts, expose tuyere case 3;
2. above tuyere case 3, curved support mold 5 is fixed;
3. above curved support mold 5, spray jetting material forms spray stockpile 7;
4. take out curved support mold 5, the gap 4 between tuyere case 3 and spray stockpile 7 is filled and is cushioned mud.
Wherein, jetting material is the High-Alumina jetting material of silicon carbide-containing, and add water ratio 3%-7%, density 2.8-3.0g/cm.
Wherein, spray jetting material is that the jetting material mixed is adopted high pressure pumping, manually holds spray gun 6 and carries out spray.
Wherein, the method forming spray stockpile 7 at the uniform velocity moves spray gun 6, and make jetting material progressively pile high heap thick, structural shape spray moulding on demand, solidifies rear formation spray stockpile 7.
Wherein, taking out curved support mold 5 is, when spray stockpile 7 reaches curdled appearance, taken out by curved support mold 5 after complete standing 24 hours in spray.
Be described further below in conjunction with the embodiment of accompanying drawing to Combination Firebrick for BF Tuyere method for repairing and mending provided by the invention:
1, as shown in Figure 1; tuyere combined brick 1 supports slag crust and the residual brick 2 on above stack stave surface, air port, and protection tuyere case 3, from the erosion of molten iron in blast furnace and furnace charge, is annulus 4 between tuyere case 3 and tuyere combined brick 1; inner filling cushions mud, plays snubber contact effect.
2, shutdown maintenance work enters in blast furnace after starting, and the top damaged by tuyere combined brick 1 is removed, and exposes tuyere case 3, and is cleaned out around slag iron, and repair material can be combined firmly with the former brick in bottom and stack stave.
3, as shown in Figure 2, make curved support mold 5 with sheet plate, be fixed on the top of tuyere case 3.
4, prepare jetting material, jetting material is the High-Alumina jetting material adopting a kind of silicon carbide-containing, and this jetting material adds water ratio control 5%, and volume density can reach 2.9g/cm
3.
5, as shown in Figure 3, jetting material adopts high pressure pumping, manually hold spray gun 6 and carry out spray moulding, and at the uniform velocity move spray gun, make jetting material progressively pile high heap thick, be conducive to reducing apparent porosity, ensure that jetting material is fine and close between layers and combine, structural shape spray moulding on demand, solidifies rear formation spray stockpile 7.
6, leave standstill 24 hours after construction, spray stockpile 7 reaches curdled appearance, after being taken out by curved support mold 5, fills annulus 4 with buffering mud.
7, can to blow after drying out curve baker on request blowing-in operation.
A kind of Combination Firebrick for BF Tuyere method for repairing and mending provided by the invention, effectively can reduce the engineering time and reduce construction organization difficulty; Farthest improve repairing quality simultaneously, extend the work-ing life of tuyere case; Reduce the replacing number of times of tuyere case simultaneously, reduce iron production declining and working of a furnace fluctuation, effectively ensure that the safe natural labor situation of blast furnace.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (3)
1. a Combination Firebrick for BF Tuyere method for repairing and mending, is characterized in that, comprising:
Remove tuyere combined brick top broken parts, expose tuyere case;
Curved support mold is fixed above tuyere case;
Above curved support mold, the jetting material mixed is adopted high pressure pumping, manually hold spray gun and carry out spray, make jetting material progressively pile high heap thick, form spray stockpile, be beneficial to reduce apparent porosity, ensure that jetting material is fine and close between layers and combine;
After described spray stockpile solidifies, take out curved support mold, the gap filling between tuyere case and spray stockpile cushions mud, plays snubber contact effect;
Described jetting material is the ratio of adding water is 3%-7%, density is 2.8-3.0g/cm
3the High-Alumina jetting material of silicon carbide-containing.
2. Combination Firebrick for BF Tuyere method for repairing and mending according to claim 1, is characterized in that: the method for described formation spray stockpile at the uniform velocity moves spray gun, and rear formation spray stockpile is solidified in structural shape spray moulding on demand.
3. Combination Firebrick for BF Tuyere method for repairing and mending according to claim 1, is characterized in that: described taking-up curved support mold, when described spray stockpile reaches curdled appearance, is taken out by curved support mold after complete standing 24 hours in spray.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210232254.7A CN102851422B (en) | 2012-07-05 | 2012-07-05 | Blast furnace tuyere combination firebrick repairing method |
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| CN201210232254.7A CN102851422B (en) | 2012-07-05 | 2012-07-05 | Blast furnace tuyere combination firebrick repairing method |
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| CN102851422A CN102851422A (en) | 2013-01-02 |
| CN102851422B true CN102851422B (en) | 2014-12-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108728666B (en) * | 2018-07-25 | 2023-09-22 | 河南中原黄金冶炼厂有限责任公司 | Gland type smelting furnace |
| CN110527766B (en) * | 2019-08-21 | 2021-05-14 | 新兴铸管股份有限公司 | Integral repairing and pouring method for tuyere belt of blast furnace |
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| CN101509051A (en) * | 2009-03-24 | 2009-08-19 | 中国第一冶金建设有限责任公司 | Building and supporting method for semiring brick on hoogoven's warm-air duct inside lining |
| CN101760576A (en) * | 2010-02-26 | 2010-06-30 | 河北省首钢迁安钢铁有限责任公司 | Repatching method for top liner of blast furnace hot-wind pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1036194A (en) * | 1988-03-28 | 1989-10-11 | 冶金工业部武汉钢铁设计研究院 | Alumina carbon brick and making thereof |
| JP2684945B2 (en) * | 1992-12-24 | 1997-12-03 | 住友金属工業株式会社 | Ash removal method on the inner surface of blast furnace tuyere |
| JPH07228907A (en) * | 1994-02-18 | 1995-08-29 | Nippon Steel Corp | Method for preventing leakage of water from broken tuyere |
| JP2004293951A (en) * | 2003-03-27 | 2004-10-21 | Nisshin Steel Co Ltd | Hot spray repair method |
| CN101402527A (en) * | 2008-10-30 | 2009-04-08 | 武汉科技大学 | Compact aluminum silicon carbide composite material and method of manufacturing the same |
| CN101857444B (en) * | 2010-05-21 | 2013-09-11 | 河南华西耐火材料有限公司 | Thermal state ceramic jetting material for longevity type blast furnace |
| CN102040386B (en) * | 2010-11-01 | 2012-09-26 | 濮阳濮耐高温材料（集团）股份有限公司 | Torpedo can spouting material and spouting method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509051A (en) * | 2009-03-24 | 2009-08-19 | 中国第一冶金建设有限责任公司 | Building and supporting method for semiring brick on hoogoven's warm-air duct inside lining |
| CN101760576A (en) * | 2010-02-26 | 2010-06-30 | 河北省首钢迁安钢铁有限责任公司 | Repatching method for top liner of blast furnace hot-wind pipeline |
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