CN103063806B - Method for detecting abnormity of remaining oxygen in thermal treatment furnace - Google Patents
Method for detecting abnormity of remaining oxygen in thermal treatment furnace Download PDFInfo
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- CN103063806B CN103063806B CN201210553424.1A CN201210553424A CN103063806B CN 103063806 B CN103063806 B CN 103063806B CN 201210553424 A CN201210553424 A CN 201210553424A CN 103063806 B CN103063806 B CN 103063806B
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Abstract
The invention discloses a method for detecting abnormity of remaining oxygen in a thermal treatment furnace, belonging to the technical field of heat treatment of plates with moderate thickness. The method for detecting abnormity of the remaining oxygen in the thermal treatment furnace comprises the following steps of: dividing the thermal treatment furnace into 5-6 detection regions based on a practical condition; measuring oxygen content in the furnace at a monitoring port of the thermal treatment furnace by using a handheld remaining oxygen instrument; considering that the oxygen content exceeds the standard if the oxygen content is greater than 1800 ppm; performing nozzle discarding analysis in an abnormal monitoring region with oxygen content exceeding the standard, wherein the components of an exhaust gas in the nozzle are similar to the components of air under the condition of no consumption, and considering that the remaining oxygen exceeds the standard if the oxygen content in the exhaust gas is lower than 20%; and closing the nozzle with the remaining oxygen exceeding the standard, and recovering during an overhaul period. The method for detecting the abnormality of the remaining oxygen in the thermal treatment furnace has the advantages of being simple and clear, and strong in operability, being able to judge an atmosphere abnormal region in the furnace exactly when an online remaining oxygen instrument loses effectiveness, avoiding oxidization of surface quality of a steel plate caused by the remaining oxygen exceeding the standard in the furnace, and improving surface quality of the thermally treated steel plate.
Description
Technical field
The invention belongs to Heat Treatment Technology for Medium Plate field, particularly the detection method of remaining oxygen exception in a kind of heat-treatment furnace, the manual inspection method of residual oxygen content exception in heat radiation tube non-oxidation roller hearth heat-treated furnace.
Background technology
Actual production light plate is in high temperature (900 ~ 940 DEG C) heat treatment process, and hearth roll surface is easy to the iron scale that bonds, and forms dross on hearth roll surface.Steel plate at high operating temperatures hardness is lower, and by effect of weight, lower surface of steel plate forms lower surface impression because of furnace hearth roller salamander, causes plate surface quality to worsen.One of source that the iron scale of heat radiation tube non-oxidation roller hearth heat-treated furnace is main be exactly in heat-treatment furnace radiant tube damage, make combustion air enter burner hearth inside from crack or site of perforation, cause atmosphere abnormal, remaining oxygen exceeds standard, and forms oxidizing atmosphere.
For addressing this problem, in thermal treatment, usually increase online residual oxygen instrument, residual oxygen atmosphere on line real-time monitoring stove.But the repairing efficiency of online residual oxygen is longer, is badly in need of a kind of monitoring method of off-line when instrument damage.
Summary of the invention
The object of the present invention is to provide the detection method of remaining oxygen exception in a kind of heat-treatment furnace, solve the detection to oxygen content in stove under online residual oxygen instrument failure conditions, to the detection of atmosphere exception in heat radiation tube non-oxidation roller hearth heat-treated furnace, comprise the following steps:
A) heat-treatment furnace is divided into 5 ~ 6 surveyed areas according to actual conditions;
B) on heat-treatment furnace, monitor mouth with hand-held residual oxygen instrument and measure oxygen content in stove, if oxygen content be greater than 1800ppm (0.18%, think that oxygen content exceeds standard;
C) carry out that burner is discarded to be analyzed to the remaining oxygen exception monitoring region that exceeds standard, in incombustible situation, the waste gas components in burner and air composition are similar to, if the oxygen content in waste gas is lower than 20%, think that remaining oxygen exceeds standard;
D) burner exceeded standard by remaining oxygen is closed, and recovers between turn(a)round.
The invention has the advantages that, method is simple and clear, workable, when can accurately judge furnace atmosphere abnormal area under online residual oxygen instrument failure conditions, avoids, because remaining oxygen in stove exceeds standard to plate surface quality oxidation, improving the surface quality of heat-treated steel plate.
Embodiment
A) heat radiation tube non-oxidation roller hearth heat-treated furnace is divided into 5 surveyed areas, is specially in burner measurement point 1, stove in measurement point 2, stove measurement point 4, stove tail measurement point 5 in measurement point 3, stove;
B) hold hand-held residual oxygen instrument 5 monitoring mouths on heat-treatment furnace and measure oxygen content in stove, in stove, the remaining oxygen in 5 districts is as shown in table 1:
The residual determination of oxygen content table of table 1 heat-treatment furnace
C) as shown in Table 1 in stove in measuring point 4 oxygen content exceed standard, carry out discarded analysis to the burner in check point 4, it is as shown in table 2 that burner discards analysis result:
The residual determination of oxygen content table of table 2 heat-treatment furnace
D) as shown in Table 2, the residual oxygen content of burner 2 and burner 3 exceeds standard, and the burner 2 and burner 3 that there is doubtful point is closed, repairs between turn(a)round.
The invention provides the detection method of atmosphere exception in a kind of heat radiation tube non-oxidation roller hearth heat-treated furnace, the method is simple and clear, workable, when can accurately judge furnace atmosphere abnormal area under online residual oxygen instrument failure conditions, avoid, because remaining oxygen in stove exceeds standard to plate surface quality oxidation, improving the surface quality of heat-treated steel plate.
Claims (1)
1. the detection method of remaining oxygen exception in heat-treatment furnace, is characterized in that, comprise the following steps:
Heat-treatment furnace is divided into 5 ~ 6 surveyed areas according to actual conditions by a;
B monitors mouth with hand-held residual oxygen instrument and measures oxygen content in stove on heat-treatment furnace, when oxygen content is greater than 1800ppm, thinks that oxygen content exceeds standard;
C carries out burner waste-gas analysis to the remaining oxygen exception monitoring region that exceeds standard, and in incombustible situation, the waste gas components in burner and air composition are similar to, and when the oxygen content in waste gas is lower than 20%, think that remaining oxygen exceeds standard;
The burner that remaining oxygen exceeds standard by d is closed, and recovers between turn(a)round.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210553424.1A CN103063806B (en) | 2012-12-18 | 2012-12-18 | Method for detecting abnormity of remaining oxygen in thermal treatment furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210553424.1A CN103063806B (en) | 2012-12-18 | 2012-12-18 | Method for detecting abnormity of remaining oxygen in thermal treatment furnace |
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| CN103063806A CN103063806A (en) | 2013-04-24 |
| CN103063806B true CN103063806B (en) | 2015-02-25 |
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| CN201210553424.1A Active CN103063806B (en) | 2012-12-18 | 2012-12-18 | Method for detecting abnormity of remaining oxygen in thermal treatment furnace |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109161659A (en) * | 2018-09-25 | 2019-01-08 | 湖南华菱湘潭钢铁有限公司 | Roller hearth heat-treated furnace radiant tube on-line measuring device and its detection method |
| CN110926713A (en) * | 2019-11-28 | 2020-03-27 | 张家港宏昌钢板有限公司 | Detection method for checking air leakage of radiant tube of non-oxidation heat treatment furnace |
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| CN101561224A (en) * | 2009-05-15 | 2009-10-21 | 首钢总公司 | Method for controlling combustion atmosphere in large-scale walking beam type plate blank heating furnace |
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| KR20110120444A (en) * | 2010-04-29 | 2011-11-04 | 현대제철 주식회사 | Apparatus controlling combustion of hotstove equipment and method thereof |
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| JP3987149B2 (en) * | 1996-12-28 | 2007-10-03 | 日新製鋼株式会社 | Method and apparatus for refining chromium-containing steel |
| KR100634776B1 (en) * | 2001-01-17 | 2006-10-16 | 제이에프이 스틸 가부시키가이샤 | Heating furnace with regenerative burners and method of operating the heating furnace |
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| CN1800848A (en) * | 2006-01-16 | 2006-07-12 | 张东平 | Combustion type gas heat value measuring method and heat value meter thereof |
| CN101561224A (en) * | 2009-05-15 | 2009-10-21 | 首钢总公司 | Method for controlling combustion atmosphere in large-scale walking beam type plate blank heating furnace |
| CN101876449A (en) * | 2009-11-17 | 2010-11-03 | 武汉钢铁(集团)公司 | Method of controlling oxygen air-flowing environment in heating furnace |
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Non-Patent Citations (1)
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Address after: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee after: Shougang Group Co. Ltd. Patentee after: Qinhuangdao Shouqin Metal Material Co., Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Capital Iron & Steel General Company Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |
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Effective date of registration: 20190529 Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 066326 Du Zhuang Township, Funing County, Qinhuangdao, Hebei Co-patentee before: Shougang Group Co. Ltd. Patentee before: Qinhuangdao Shouqin Metal Material Co., Ltd. |