CN101514896B - Convertor lining thickness online testing method and device thereof - Google Patents
Convertor lining thickness online testing method and device thereof Download PDFInfo
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- CN101514896B CN101514896B CN200810124742XA CN200810124742A CN101514896B CN 101514896 B CN101514896 B CN 101514896B CN 200810124742X A CN200810124742X A CN 200810124742XA CN 200810124742 A CN200810124742 A CN 200810124742A CN 101514896 B CN101514896 B CN 101514896B
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Abstract
The invention discloses a converter lining thickness online testing method and a device thereof. The testing method comprises the following steps: (1) establishing a converter value module by finite element software to perform a steady-state calculation on converter lining temperature and thickness so as to determine distribution of temperature in a converter lining, setting measuring points in a converter body, and obtaining a converter lining temperature-thickness reference table; (2) according to the determined measuring points in step 1, burying thermocouple temperature measuring devices in a lining permanent layer of the converter and the bottom of the converter body; (3) according to data acquired in step 2, combining the converter lining temperature-thickness reference table obtained in step 1 to backward calculate the converter lining thickness; and (4) determining whether to perform repair treatment on the converter lining or not according to the lining thickness obtained in step 3. The device adopted by the invention comprises the converter body (1), and the thermocouple temperature measuring device is arranged in the lining permanent layer (2) of the converter body (1). The method and the device have simple working procedures and high measuring accuracy, and can effectively improve the campaign length of the converter.
Description
Technical field
The present invention relates to the method and the device of a kind of detection lining thickness of used converter in process for making, relate in particular to and a kind of convertor lining thickness is carried out on-line detection method and device thereof.
Background technology
Converter body is made up of furnace shell and furnace lining, and furnace lining mainly is made up of working lining and permanent layer.Working lining directly contacts with liquid metal, slag, furnace gas in the stove, constantly is subjected to physics, mechanical and effect chemistry, and furnace lining constantly is etched; Because erosion is inhomogeneous, cause the local havoc of furnace lining easily, so just make that the furnace shell local temperature is too high, can cause the furnace shell gross distortion, even bleed-out, bring loss to production.Therefore, the continuous online fast monitored work of lining thickness has important role to STEELMAKING PRODUCTION.
For extending furnace lining life, improve the throughput rate of converter, reduction STEELMAKING PRODUCTION cost adopts the method for laser ranging to measure the furnace lining surface undulation both at home and abroad mostly, grasps the lining wear situation, slag splashing, the throwing of furnace lining are mended or spray repair is handled so that carry out.But this technology has following three key issues to need to solve: (1) optics and digital filtering need to extract in noise and strong jamming background, and laser beam easily reflects, and influences measurement result; (2) sequential of each several part information, the flow direction and harmonious to central controller thereof; (3) thermal current, slag etc. are bigger to the measuring sensor influence, greatly influence the precision of measured value, and the maximum deviation under the equal conditions is up to 50mm.
In addition, carry out the online thickness measure of furnace lining by means such as infrared pick-up method, heat flow meter methods in addition in the prior art, these methods exist the not high defective of measuring accuracy equally.
Summary of the invention
The technical problem to be solved in the present invention provides convertor lining thickness On-line Measuring Method and the device thereof that a kind of operation is simple, measurement accuracy is high.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of convertor lining thickness online testing method, this method may further comprise the steps:
1. adopt finite element software to set up the converter numerical model, converter lining temperature and lining thickness are carried out stable state calculating, determine the distribution of temperature in the furnace lining, set the measurement point of temperature in the body of heater, and obtain temperature of furnace lining-thickness reference table;
2. according to the 1. determined measurement point of step, bury thermocouple temperature measuring apparatus underground, furnace lining is carried out the on-line continuous thermometric in converter lining permanent layer and converter body bottom;
3. according to 2. gained data of step, the temperature of furnace lining that 1. integrating step is drawn-thickness reference table, backwards calculation goes out lining thickness;
4. according to step 3. the lining thickness decision of gained whether furnace lining in the converter is carried out repair process.
The isodensity distribution vertically in the circumference furnace lining of converter of the 2. middle thermocouple temperature measuring apparatus of step, in the radially isodensity distribution of converter furnace bottom, and the distribution density at the backing ring position of converter is greater than the distribution density of its elsewhere.
The repair process of step described in 4. comprises throwing mends or spray repair is handled.
A kind of device of implementing convertor lining thickness online testing method, comprise converter body, in the furnace lining permanent layer of converter body, be provided with thermocouple temperature measuring apparatus, and thermocouple temperature measuring apparatus is isodensity distribution vertically in the circumference furnace lining permanent layer of converter, the distribution density at the backing ring position of converter is greater than the distribution density of its elsewhere, and thermocouple temperature measuring apparatus is in the radially isodensity distribution of converter furnace bottom.
Compared with prior art, the technology of the present invention has the following advantages:
1, operation of the present invention is simple, accuracy of measurement is high.In the present invention, set up the numerical evaluation model, obtained the high-temperature region of converter lining working lining, just can determine the variation in temperature field, thereby make temperature of furnace lining-thickness reference table by the working lining that different-thickness is set by finite element software; Again by burying thermocouple temperature measuring apparatus underground in furnace lining permanent layer and converter body bottom, furnace lining is carried out the on-line continuous thermometric, utilize existing temperature of furnace lining-thickness reference table backwards calculation to go out the thickness of furnace lining, with regard to decision the furnace lining of converter is repaired then, whole technological process is simple and clear; And because the working of a furnace is complicated and changeable, heat conduction is a kind of thermal diffusion process, internal temperature and hot-fluid change influence to temperature field in the furnace lining through overdamping, temperature element is located at carries out online direct measurement on the furnace lining permanent layer, draw working lining thickness then, like this accuracy height.
2, the present invention can effectively improve the furnace life of converter.In the present invention, all be embedded with thermocouple temperature measuring apparatus in converter lining permanent layer and converter body bottom, these temperature measuring equipments form online multi-channel measurement temperature integrated system, help in time finding out furnace lining and need throw benefit or spray repair point, thereby effectively improve the furnace life of converter.
3, the present invention can effectively realize the bleed-out early warning.Because near the furnace shell radiating condition backing ring is poor, particularly when tapping and slagging tap, also be subjected to the heat radiation of slag in interior molten steel of ladle and the slag ladle, the furnace lining at this position is subjected to localized attack easily, causes furnace shell to damage, even causes bleed-out, therefore the present invention encrypts near backing ring thermocouple temperature measuring apparatus is set, realized strictness monitoring like this, effectively prevented the generation of bleed-out accident, strengthened the security of STEELMAKING PRODUCTION this place's temperature.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is grid dividing figure of the present invention.
Fig. 2 is the structural representation of convertor lining thickness on-line measuring device of the present invention.
Fig. 3 is the A-A cut-open view of Fig. 2.
Fig. 4 is the B-B cut-open view of Fig. 2.
Fig. 5 is the furnace lining-furnace shell coefficient of heat conductivity figure of convertor lining thickness on-line measuring device of the present invention.
Fig. 6 is the furnace lining-permanent layer coefficient of heat conductivity figure of convertor lining thickness on-line measuring device of the present invention.
Fig. 7 is the furnace lining-working lining coefficient of heat conductivity figure of convertor lining thickness on-line measuring device of the present invention.
Fig. 8 is the shaft furnace lining measurement point temperature contrast figure of convertor lining thickness on-line measuring device of the present invention.
Fig. 9 is the initial temperature distribution plan of each point for measuring temperature of furnace bottom of convertor lining thickness on-line measuring device of the present invention.
Embodiment
A kind of convertor lining thickness online testing method, this method may further comprise the steps:
1. adopt finite element software to set up the converter numerical model, converter lining temperature and lining thickness are carried out stable state calculating, determine the distribution of temperature in the furnace lining, set the measurement point of temperature in the body of heater, and obtain temperature of furnace lining-thickness reference table;
2. according to the 1. determined measurement point of step, bury thermocouple temperature measuring apparatus underground, furnace lining is carried out the on-line continuous thermometric in converter lining permanent layer and converter body bottom;
3. according to 2. gained data of step, the temperature of furnace lining that 1. integrating step is drawn-thickness reference table, backwards calculation goes out lining thickness;
4. according to step 3. the lining thickness decision of gained whether furnace lining in the converter is carried out repair process.
In the present embodiment, the isodensity distribution vertically in the circumference furnace lining permanent layer of converter of the 2. middle thermocouple temperature measuring apparatus of step, and the distribution density at the backing ring position of converter is greater than the distribution density of its elsewhere, thermocouple temperature measuring apparatus 4 the converter furnace bottom radially isodensity distribute, the repair process of step described in 4. comprises throwing mends or spray repair is handled.
A kind of device of implementing convertor lining thickness online testing method, comprise converter body 1, in the furnace lining permanent layer 2 of converter body 1, be provided with thermocouple temperature measuring apparatus 4, and thermocouple temperature measuring apparatus 4 is isodensity distribution vertically in the circumference furnace lining permanent layer of converter, the distribution density at the backing ring position of converter is greater than the distribution density of its elsewhere, thermocouple temperature measuring apparatus 4 is in the radially isodensity distribution of converter furnace bottom, thermocouple temperature measuring apparatus 4 along the radial and axial layout of body of heater with reference to Fig. 2, Fig. 3 and Fig. 4, the thermocouple temperature measuring apparatus 4 specific requirement parameters of selecting for use in the present embodiment are as follows: single platinum rhodium 10-platinum type thermopair, temperature range: 0～1300 ℃; No fixed installation pattern; Model: WRP-120, WRP-121, calibration number: S; Insulating tube Φ 16～Φ 25; Total length: 300～2150mm; Put profound degree: 150～2000mm; Response time τ
0.5＜90s; The corresponding calibration of compensating wire number: S, length :～20,000mm.
In the present embodiment, at first adopt AutoCAD mapping software and finite element analysis software to adopt Ansys6.0 software, set up converter two-dimensional mathematics model as shown in Figure 1, being provided with of boundary condition is as follows: the temperature of setting furnace lining working lining 3 is 1600 ℃, and the temperature of furnace shell is 30 ℃, then converter lining temperature and thickness is carried out stable state calculating, find out funtcional relationship between the two, make temperature of furnace lining-thickness reference table, (with reference to Fig. 8 and Fig. 9), the expression formula that above-mentioned funtcional relationship is concrete is T
1=1610.7D
1 -0.439, T
2=1587.3D
2 -0.5652, T in expression formula
1Expression shaft temperature of furnace lining, D
1Expression shaft working lining thickness, T
2Expression furnace bottom temperature of furnace lining, D
2Expression furnace bottom working lining thickness.
After setting thermocouple temperature measuring apparatus, thermopair will begin the on-line continuous thermometric, the thermometric cycle of Xuan Zeing was less than 2 seconds in the present embodiment, measurement result is put in order by data acquisition system (DAS), be depicted as furnace lining spatial temperature distribution cloud atlas, when the value of establishing of temperature of furnace lining 〉=just, promptly need to carry out this zone furnace lining and throw benefit, spray repair is handled, for example, when first value of establishing of the first value of establishing of shaft temperature of furnace lining and furnace bottom temperature of furnace lining is set to 938 ℃ and 800 ℃ respectively, when shaft temperature of furnace lining 〉=938 ℃ and furnace bottom temperature of furnace lining 〉=800 ℃, just need throw and mend or the spray repair processing this zone furnace lining.
Claims (3)
1. convertor lining thickness online testing method, it is characterized in that: this method may further comprise the steps:
1. adopt finite element software to set up the converter numerical model, converter lining temperature and lining thickness are carried out stable state calculating, determine the distribution of temperature in the furnace lining, set the measurement point of temperature in the body of heater, and obtain temperature of furnace lining-thickness reference table;
2. according to the 1. determined measurement point of step, bury thermocouple temperature measuring apparatus underground in converter lining permanent layer and converter body bottom, furnace lining is carried out the on-line continuous thermometric, thermocouple temperature measuring apparatus is isodensity distribution vertically in the circumference furnace lining permanent layer of converter, and the distribution density at the backing ring position of converter is greater than the distribution density of its elsewhere, and thermocouple temperature measuring apparatus is in the radially isodensity distribution of converter furnace bottom;
3. according to 2. gained data of step, the temperature of furnace lining that 1. integrating step is drawn-thickness reference table, backwards calculation goes out lining thickness;
4. according to step 3. the lining thickness decision of gained whether furnace lining in the converter is carried out repair process.
2. convertor lining thickness online testing method according to claim 1 is characterized in that: the repair process of step described in 4. comprises throwing mends or spray repair is handled.
3. device of implementing the described convertor lining thickness online testing method of claim 1, comprise converter body (1), it is characterized in that: in the furnace lining permanent layer (2) of converter body (1), be provided with thermocouple temperature measuring apparatus, and thermocouple temperature measuring apparatus is isodensity distribution vertically in the circumference furnace lining permanent layer of converter, the distribution density at the backing ring position of converter is greater than the distribution density of its elsewhere, and thermocouple temperature measuring apparatus is in the radially isodensity distribution of converter furnace bottom.
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| CN200810124742XA CN101514896B (en) | 2008-09-02 | 2008-09-02 | Convertor lining thickness online testing method and device thereof |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102322804A (en) * | 2011-05-21 | 2012-01-18 | 山西太钢不锈钢股份有限公司 | Method of detecting erosion degree of lining of argon oxygen decarburizing furnace |
| CN103712470A (en) * | 2012-10-08 | 2014-04-09 | 丹阳市江南工业炉有限公司 | Thermocouple device of thermal treatment furnace |
| CN103322794B (en) * | 2013-06-26 | 2014-09-24 | 中冶长天国际工程有限责任公司 | Method and device for detecting changes of rotary kiln lining |
| CN105803153B (en) * | 2016-04-05 | 2018-05-01 | 钢铁研究总院 | The real time on-line monitoring system and method for converter lining refractory material security |
| CN106368814B (en) * | 2016-08-31 | 2019-03-05 | 华中科技大学 | The method of real-time of maximum temperature in combustion engine cylinder head |
| CN107164602B (en) * | 2017-07-19 | 2018-12-11 | 钢铁研究总院 | A kind of converter bottom measurer for thickness and method |
| CN112179945B (en) * | 2019-07-01 | 2024-08-06 | 上海梅山钢铁股份有限公司 | Device and method for online monitoring defects of furnace wall of high-temperature reaction furnace |
| CN110453034A (en) * | 2019-08-26 | 2019-11-15 | 北京北科神州亿立冶金材料研究所 | A kind of device and method of on-line real time monitoring converter lining erosion state |
| CN110669896B (en) * | 2019-09-11 | 2021-10-22 | 山东钢铁股份有限公司 | Converter body multipoint temperature measurement method |
| CN111172350A (en) * | 2020-01-14 | 2020-05-19 | 山东钢铁股份有限公司 | Converter material throwing fast repairing method |
| CN111850230A (en) * | 2020-06-10 | 2020-10-30 | 唐山钢铁集团有限责任公司 | Method for early warning of steel leakage risk near bottom-blown brick of converter |
| CN114234880A (en) * | 2020-09-09 | 2022-03-25 | 南京宝地梅山产城发展有限公司 | Online monitoring method for lining thickness of torpedo tank refractory material |
| CN113324507B (en) * | 2021-06-21 | 2022-07-05 | 中钢集团洛阳耐火材料研究院有限公司 | Online monitoring and early warning method for thickness of lining material of high-temperature coal gasification device |
| CN113607593A (en) * | 2021-07-30 | 2021-11-05 | 成都东骏激光股份有限公司 | Temperature measuring method for core area of temperature field in preparation process of high-temperature material |
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Assignee: Huatian Nanjing Engineering & Technology Corporation, MCC Assignor: Zhongye Huatian Engineering Technology Co., Ltd. Contract record no.: 2011320000561 Denomination of invention: Convertor lining thickness online testing method and device thereof Granted publication date: 20100818 License type: Exclusive License Open date: 20090826 Record date: 20110415 |