CN105385836A - Method for processing furnace roller nodules on line without opening furnace - Google Patents
Method for processing furnace roller nodules on line without opening furnace Download PDFInfo
- Publication number
- CN105385836A CN105385836A CN201510968915.6A CN201510968915A CN105385836A CN 105385836 A CN105385836 A CN 105385836A CN 201510968915 A CN201510968915 A CN 201510968915A CN 105385836 A CN105385836 A CN 105385836A
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- roller
- furnace
- furnace roller
- reconditioning
- blow
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/562—Details
- C21D9/563—Rolls; Drums; Roll arrangements
Abstract
The invention discloses a method for processing furnace roller nodules on line without opening a furnace. Due to the fact that the operating speed of band steel in the furnace is the same as the linear speed of furnace rollers, the diameter of the furnace rollers is corrected, and accordingly a new angular speed is produced by a furnace roller motor so as to be the same as the linear speed of other furnace rollers. According to the control scheme, the diameter of the furnace rollers to be repaired and ground is adjusted analogously by an operator so as to change the speed of the furnace rollers, and accordingly friction is generated between the furnace roller and the band steel, so that the nodules attached to the surfaces of the furnace rollers are eliminated or smoothed. Compared with the prior art, by means of the method for the furnace roller nodules in the initial stage, the quality deflects such as hard spots on the surfaces of the band steel are effectively relieved or eliminated, the surface quality of a finished roll is improved, the frequency of furnace opening to clean the furnace roller nodules annually is decreased, and the service life and the economic life of the furnace rollers are prolonged.
Description
Technical field
The invention belongs to steel rolling process process field, be specifically related to a kind of method of not blow-on online treatment furnace roller dross.
Background technology
In continuous annealing furnace, furnace roller plays the effect of pilot tape steel trend, heats under making band steel keep kinestate in stove.In normal productive process, due to the impact of the factors such as incoming band steel surface clearness is poor, the precipitation of furnace roller coating abrasion, some element of incoming band steel, furnace atmosphere instability, furnace roller surface can be caused to produce dross phenomenon.If dross thing processes not in time, then constantly agglomeration also firmly adheres to furnace roller surface, causes belt steel surface to produce " pit ".
Usually, we are called furnace roller dross thing the foreign matter adhering to furnace roller surface.Furnace roller dross phenomenon annoyings most strip continuous annealing production line so far.Easily form the mass defect such as pit, load mould at belt steel surface when roll surface surface cord, have a strong impact on strip surface quality.
The treatment process of furnace roller surface cord, needs blow-on usually, artificial dry ice cleaning or change furnace roller, not only takies a large amount of production times, and somewhat expensive, to enter stove cleaning furnace roller surface cord potential safety hazard large.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of method of not blow-on online treatment furnace roller dross.At the furnace roller dross initial stage and the mass defects such as belt steel surface pit are slighter time, select suitable steel grade, the required reconditioning furnace roller roller footpath of adjustment is simulated by time variable control, change the speed of furnace roller, thus Relative friction is produced between furnace roller and band steel, flattening-out, elimination dross thing, alleviate the mass defect such as belt steel surface stain, pit even eliminated and cause because of furnace roller dross as far as possible, improve surface quality, proper extension furnace roller work-ing life and the blow-on cycle of finished product volume.
The method of a kind of not blow-on online treatment furnace roller dross provided by the invention, comprises the following steps:
A, will the furnace roller of grinding roller be needed to divide into groups;
B, correction PLC control program, can according to order auto modification furnace roller roller footpath data; Grinding roller red-tape operati interface is increased at HMI operation screen;
C, select tape steel enter annealing furnace process, according to the online reconditioning furnace roller of roller footpath correction.
Further, before step a, judge that furnace roller the need of the method for grinding roller is: produce the initial stage in furnace roller dross phenomenon, when producing the IF series mild steel of think gauge 1.5-2.0mm, because stove internal tension is higher, from the annealing furnace visible sparse point-like stain of the upper and lower surperficial naked eyes of band steel out or pit defect, after oilstone polishing belt steel surface, defect is more obvious, now can judge that furnace roller produces dross phenomenon, can prepare at any time to start grinding roller program.
Further, in step a, group forming criterion is: be respectively divided into one group with tension control region top roller, bottom roller, each reconditioning one group; Two deviation rectification roller can not simultaneously reconditioning, each reconditioning one; Tension meter roll needs independent numbered packets; The furnace roller in differential roller footpath can not divide at same group.
Further, the roller footpath correction arranged in step b is the 0.5-1% in former roller footpath.
Further, in step b, HMI operation screen increase grinding roller red-tape operati interface comprises: grinding roller starts and button of ceasing and desisting order, grinding roller packet number input frame, roller footpath correction input frame.
Further, in step c, the standard of select tape steel is: band steel selects yield strength to be greater than the CQ level aluminium killed steel series of 250MPa, and thickness is between 1.2-1.5mm, and width is the band steel of 1400-1500mm; Required band coil of strip number 6-8 volume.
Further, in step c, stable, constant-speed operation and the stove district tension stability of band steel in stove during the online reconditioning of furnace roller, to be ensured; The same time period only allows one group of furnace roller in the same tension control region of reconditioning.
Further, in step c, band steel wire speed control at 120-150m/min, tension control stack pile, with the CQ level aluminium killed steel series mill roll strip normal secondary tension force set(ting)value of width 1-1.2 doubly, i.e. grinding roller tension force set(ting)value=normal produces secondary tension force set(ting)value * 1-1.2; When furnace temperature is normally produced with same specification CQ level aluminium killed steel serial band-steel, furnace temperature is identical.
Further, in step c, the concrete operations of online reconditioning furnace roller are: click on HMI picture and open grinding roller red-tape operati interface, input needs packet number and the roller footpath correction of reconditioning furnace roller, after first roll reconditioning involves in annealing furnace and takes the lead to arrive overaging section, press grinding roller start button at grinding roller red-tape operati interface, start to start grinding roller program.
Further, in step c, the time controling of single group furnace roller roller surface reparation grinding is at 15-20min.
Further, step c also comprises: terminate when this group furnace roller reconditioning time, presses grinding roller stop button at grinding roller red-tape operati interface, and stop grinding roller operation, the furnace roller roller footpath completing reconditioning is reverted to original set value by program automatically.After one group of furnace roller reconditioning completes, at grinding roller red-tape operati interface by the packet number of change reconditioning furnace roller, restart grinding roller sequence of control to realize the online reconditioning of next group furnace roller according to above-mentioned steps.
The control thought of online reconditioning furnace roller of the present invention for: belonging to continuous annealing furnace each tension control region, the linear velocity of furnace roller has identical set(ting)value, linear velocity is also identical therewith for the travelling speed of stove interior band steel, and can learn that there is direct relation in itself and furnace roller roller footpath according to the calculation formula of linear velocity.In production, operative employee is by judging the particular case such as strip surface quality situation, supplied materials steel grade, and can revise the roller footpath of certain root or certain group furnace roller at any time, then furnace roller motor can produce new circular frequency to reach the linear velocity identical with other furnace rollers.According to this control thought, operative employee, by the required reconditioning furnace roller roller footpath of simulation adjustment, changes the speed of furnace roller, thus produces between furnace roller and band steel and rub, to eliminate or to smooth the dross thing being attached to furnace roller surface.
Compared with prior art, adopt the present invention effectively can alleviate at the furnace roller dross initial stage or eliminate the mass defects such as belt steel surface pit, improve finished product volume surface quality, reduce the number of times of annual blow-on cleaning furnace roller dross, extend the use of furnace roller, economical life.Product degradation that the surface quality defect such as pit that produces because of furnace roller dross causes can be reduced every year, production loss that blow-on causes, dielectric dissipation, furnace roller are changed in advance etc. directly, indirect loss.
Embodiment
Embodiment 1
A method for not blow-on online treatment furnace roller dross, specifically comprises the following steps:
To the online reconditioning of furnace roller roll surface when not blow-on, strip running deviation in stove, tension force big ups and downs may be caused, the even risk of broken belt, therefore enforcement of the present invention needs experienced operation and maintenance of the equipment personnel to cooperatively interact, and has come according to correct mode.With certain continuous annealing line online grinding roller process dross for example, this production line incoming band steel thickness is 0.4-2.5mm, supplied materials width is 900-2000mm, annealing furnace is divided into that preheating, heating (I, II section), soaking, slow cooling, sudden strain of a muscle are cold, overaging, two cold, cold totally nine sections eventually, what easily produce dross thing is soaking zone, slow cooling section.
Implementation method is illustrated below for soaking zone:
(1) opportunity of reconditioning furnace roller is judged: produce the initial stage in furnace roller dross phenomenon, when producing think gauge (1.5-2.0mm) IF series mild steel, because stove internal tension is higher, from the annealing furnace visible sparse point-like stain of the upper and lower surperficial naked eyes of band steel out or pit defect, after oilstone polishing belt steel surface, defect is more obvious, now can judge that furnace roller produces dross phenomenon, can prepare at any time to start grinding roller program.
(2) first will the soaking zone 34#-44# furnace roller of reconditioning be needed to carry out packet numbering in advance according to difference in functionality and group forming criterion, group forming criterion be: be respectively divided into one group with tension control region top roller, bottom roller, each reconditioning one group; Two deviation rectification roller can not simultaneously reconditioning, each reconditioning one; Tension meter roll needs independent numbered packets; The furnace roller in differential roller footpath can not divide at same group.
This annealing furnace soaking zone 34#-44# furnace roller roller footpath is all identical, is 900mm, but Various Functions, 36,37# furnace roller is two correction top rollers, and 44# roller is tonometer bottom roller, and 34#, 39#, 41#, 43# are top roller, 35#, 38#, 40#, 42# are bottom roller, can be divided into according to above-mentioned group forming criterion:
First group: 34#, 36#, 39#;
Second group: 37#, 41#, 43#;
3rd group: 35#, 38#, 40#, 42#;
4th group: 44#.
(3) the former roller footpath sequence of control in PLC control program is modified, perfect, auto modification furnace roller roller footpath data can be carried out according to the order of operative employee's start/stop reconditioning furnace roller; HMI operation screen increases grinding roller red-tape operati interface, comprises the parameters such as grinding roller startup and button of ceasing and desisting order, grinding roller packet number input frame, roller footpath correction input frame.
(4) selected during roller surface reparation grinding band steel needs to possess the characteristics such as material is comparatively hard, yield strength is comparatively large, stove internal tension is high, select thickness between 1.2-1.5mm, width is that the CQ level aluminium killed steel serial band-steel 6-8 that yield strength between 1400-1500mm is greater than 250MPa rolls up.
(5) stable, constant-speed operation and the stove district tension stability of band steel in stove will be ensured during the online reconditioning of furnace roller, speed general control is at 120-150m/min, tension control stack pile, with the CQ level aluminium killed steel series mill roll strip normal secondary tension force set(ting)value of width 1-1.2 doubly, i.e. grinding roller tension force set(ting)value=normal production secondary tension force set(ting)value * 1-1.2, when furnace temperature is normally produced with same specification CQ level aluminium killed steel serial band-steel, furnace temperature is identical.
(6) scope of roller footpath correction is suitable, and general control is needing the 0.5-1 ﹪ of reconditioning furnace roller roller footpath 900mm, and scope is excessive can cause coming off of furnace roller surface spraying material on the contrary.
(7) before operative employee prepares to implement online reconditioning furnace roller dross, first to click on HMI picture and open grinding roller red-tape operati interface, input needs packet number and the roller footpath correction of reconditioning furnace roller, be grouped into example with above-mentioned soaking zone: packet number input 1, representative prepares reconditioning 34#, 36#, 39# furnace roller; Roller footpath correction is input as 8.0mm, when representative starts reconditioning, 8mm is reduced by original roller diameter 900mm in the roller footpath of preparation reconditioning roller, adopts 892mm as grinding roller roller footpath.
(8) when first roll reconditioning involves in annealing furnace and after taking the lead to arrive overaging section, operative employee presses grinding roller start button at grinding roller red-tape operati interface and starts to start grinding roller program.
(9) after PLC receives the grinding roller startup command that operative employee sends from HMI picture, according to furnace roller packet number and the roller footpath correction of operative employee's input, corresponding furnace roller original roller diameter is deducted correction and obtains new roller footpath data by program automatically, roller speed is changed thus reaches roller surface reparation grinding function.
(10) time of single group furnace roller roller surface reparation grinding is not easily long, and general control is at 15-20min.
(11) terminate when this group furnace roller reconditioning time, operative employee presses grinding roller stop button at grinding roller red-tape operati interface, and stop grinding roller operation, the furnace roller roller footpath completing reconditioning is reverted to original set value by program automatically;
(12) after one group of furnace roller reconditioning completes, operative employee, by the packet number of change reconditioning furnace roller, restarts grinding roller sequence of control to realize the online reconditioning of next group furnace roller according to above-mentioned steps;
(13) the same time period only allows one group of furnace roller in the same tension control region of reconditioning, and soaking zone is respectively organized after furnace roller reconditioning completes and continued reconditioning slow cooling section furnace roller again, and so forth until the online reconditioning end of processing of all soaking zones, slow cooling section furnace roller.
(14) online reconditioning furnace roller dross terminate after 12-24 hour, thickness is arranged to be that the IF series mild steel of about 1.5mm is reached the standard grade production, can find that come out of the stove rear surface stain, pit defect of band steel obviously alleviates, even eliminates, meet below 1.0mm thickness IF series mild steel completely and to reach the standard grade working condition and surface quality requirements.
Claims (10)
1. a method for not blow-on online treatment furnace roller dross, is characterized in that, said method comprising the steps of:
A, will the furnace roller of grinding roller be needed to divide into groups;
B, correction PLC control program, can according to order auto modification furnace roller roller footpath data; Grinding roller red-tape operati interface is increased at HMI operation screen;
C, select tape steel enter annealing furnace process, according to the online reconditioning furnace roller of roller footpath correction.
2. the method for not blow-on online treatment furnace roller dross according to claim 1, it is characterized in that, in step a, group forming criterion is: be respectively divided into one group with tension control region top roller, bottom roller, each reconditioning one group; Two deviation rectification roller can not simultaneously reconditioning, each reconditioning one; Tension meter roll needs independent numbered packets; The furnace roller in differential roller footpath can not divide at same group.
3. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, is characterized in that, the roller footpath correction arranged in step b is the 0.5-1% in former roller footpath.
4. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, it is characterized in that, in step b, HMI operation screen increase grinding roller red-tape operati interface comprises: grinding roller starts and button of ceasing and desisting order, grinding roller packet number input frame, roller footpath correction input frame.
5. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, it is characterized in that, in step c, select tape steel is: yield strength is greater than the CQ level aluminium killed steel series of 250MPa, and thickness is between 1.2-1.5mm, and width is the band steel of 1400-1500mm.
6. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, is characterized in that, in step c, will ensure stable, constant-speed operation and the stove district tension stability of band steel in stove during the online reconditioning of furnace roller.
7. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, is characterized in that, in step c, the same time period only allows one group of furnace roller in the same tension control region of reconditioning.
8. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, it is characterized in that, in step c, band steel wire speed control is at 120-150m/min, tension control stack pile, with the CQ level aluminium killed steel series mill roll strip normal secondary tension force set(ting)value of width 1-1.2 doubly, when furnace temperature is normally produced with same specification band steel, furnace temperature is identical.
9. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, is characterized in that, in step c, the time controling of single group furnace roller roller surface reparation grinding is at 15-20min.
10. the method for not blow-on online treatment furnace roller dross according to claim 1 and 2, it is characterized in that, in step c, the concrete operations of online reconditioning furnace roller are: click on HMI picture and open grinding roller red-tape operati interface, input needs packet number and the roller footpath correction of reconditioning furnace roller, after first roll reconditioning involves in annealing furnace and takes the lead to arrive overaging section, press grinding roller start button at grinding roller red-tape operati interface, start to start grinding roller program.
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| CN201510968915.6A CN105385836B (en) | 2015-12-21 | 2015-12-21 | A kind of method that not blow-on handles furnace roller dross online |
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| CN201510968915.6A CN105385836B (en) | 2015-12-21 | 2015-12-21 | A kind of method that not blow-on handles furnace roller dross online |
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| CN105385836A true CN105385836A (en) | 2016-03-09 |
| CN105385836B CN105385836B (en) | 2017-08-25 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282514A (en) * | 2016-08-17 | 2017-01-04 | 武汉钢铁股份有限公司 | Heat treatment furnace roller repairing and reusing method |
| CN107488782A (en) * | 2016-06-13 | 2017-12-19 | 上海梅山钢铁股份有限公司 | A kind of galvanizing Horizental annealer furnace rolls face foreign matter sweep-out method |
| CN109926895A (en) * | 2019-02-28 | 2019-06-25 | 北京首钢股份有限公司 | The online reconditioning control method of furnace roller and device in a kind of annealing furnace |
| CN110512055A (en) * | 2018-05-22 | 2019-11-29 | 宝山钢铁股份有限公司 | The processing method of strip dross coining defect in a kind of Horizental annealer |
| CN110724812A (en) * | 2019-10-10 | 2020-01-24 | 邯郸钢铁集团有限责任公司 | Method for eliminating furnace roller indentation defect of continuous annealing furnace |
| CN111230054A (en) * | 2020-03-11 | 2020-06-05 | 柳州钢铁股份有限公司 | Method for cleaning slag adhered to bottom of steel ladle |
| CN112621391A (en) * | 2019-10-09 | 2021-04-09 | 上海宝信软件股份有限公司 | Visual continuous annealing furnace roller automatic grinding method and medium |
| CN112941951A (en) * | 2021-04-13 | 2021-06-11 | 福建省青山纸业股份有限公司 | Method for detecting and adjusting first pressing speed of paper machine pressing part |
| CN113774212A (en) * | 2021-08-23 | 2021-12-10 | 山东钢铁集团日照有限公司 | Method for eliminating machine set punch marks through machine set start and stop |
| CN113798981A (en) * | 2021-08-30 | 2021-12-17 | 马钢(合肥)板材有限责任公司 | Method for quickly eliminating furnace roller surface nodules |
| CN115323126A (en) * | 2022-07-27 | 2022-11-11 | 攀钢集团西昌钢钒有限公司 | Method for quickly reducing accretions on furnace roller of continuous annealing furnace and prolonging service cycle of furnace roller |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488782A (en) * | 2016-06-13 | 2017-12-19 | 上海梅山钢铁股份有限公司 | A kind of galvanizing Horizental annealer furnace rolls face foreign matter sweep-out method |
| CN107488782B (en) * | 2016-06-13 | 2019-02-05 | 上海梅山钢铁股份有限公司 | A kind of hot galvanizing Horizental annealer furnace rolls face foreign matter sweep-out method |
| CN106282514A (en) * | 2016-08-17 | 2017-01-04 | 武汉钢铁股份有限公司 | Heat treatment furnace roller repairing and reusing method |
| CN106282514B (en) * | 2016-08-17 | 2018-10-16 | 武汉钢铁有限公司 | It is heat-treated furnace roller repairing and reusing method |
| CN110512055A (en) * | 2018-05-22 | 2019-11-29 | 宝山钢铁股份有限公司 | The processing method of strip dross coining defect in a kind of Horizental annealer |
| CN110512055B (en) * | 2018-05-22 | 2021-03-12 | 宝山钢铁股份有限公司 | Method for treating strip steel nodulation impression defects in horizontal annealing furnace |
| CN109926895A (en) * | 2019-02-28 | 2019-06-25 | 北京首钢股份有限公司 | The online reconditioning control method of furnace roller and device in a kind of annealing furnace |
| CN112621391A (en) * | 2019-10-09 | 2021-04-09 | 上海宝信软件股份有限公司 | Visual continuous annealing furnace roller automatic grinding method and medium |
| CN110724812B (en) * | 2019-10-10 | 2021-03-09 | 邯郸钢铁集团有限责任公司 | Method for eliminating furnace roller indentation defect of continuous annealing furnace |
| CN110724812A (en) * | 2019-10-10 | 2020-01-24 | 邯郸钢铁集团有限责任公司 | Method for eliminating furnace roller indentation defect of continuous annealing furnace |
| CN111230054A (en) * | 2020-03-11 | 2020-06-05 | 柳州钢铁股份有限公司 | Method for cleaning slag adhered to bottom of steel ladle |
| CN111230054B (en) * | 2020-03-11 | 2021-04-06 | 柳州钢铁股份有限公司 | Method for cleaning slag adhered to bottom of steel ladle |
| CN112941951A (en) * | 2021-04-13 | 2021-06-11 | 福建省青山纸业股份有限公司 | Method for detecting and adjusting first pressing speed of paper machine pressing part |
| CN112941951B (en) * | 2021-04-13 | 2023-02-17 | 福建省青山纸业股份有限公司 | Method for detecting and adjusting first pressing speed of paper machine pressing part |
| CN113774212A (en) * | 2021-08-23 | 2021-12-10 | 山东钢铁集团日照有限公司 | Method for eliminating machine set punch marks through machine set start and stop |
| CN113774212B (en) * | 2021-08-23 | 2022-11-22 | 山东钢铁集团日照有限公司 | Method for eliminating machine set punch marks through machine set start and stop |
| CN113798981A (en) * | 2021-08-30 | 2021-12-17 | 马钢(合肥)板材有限责任公司 | Method for quickly eliminating furnace roller surface nodules |
| CN115323126A (en) * | 2022-07-27 | 2022-11-11 | 攀钢集团西昌钢钒有限公司 | Method for quickly reducing accretions on furnace roller of continuous annealing furnace and prolonging service cycle of furnace roller |
| CN115323126B (en) * | 2022-07-27 | 2023-05-23 | 攀钢集团西昌钢钒有限公司 | Method for rapidly reducing furnace roller nodulation of continuous annealing furnace and prolonging service cycle of furnace roller nodulation |
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