CN107604150A - Suppress the method for furnace roller of continuous annealing furnace dross - Google Patents
Suppress the method for furnace roller of continuous annealing furnace dross Download PDFInfo
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- CN107604150A CN107604150A CN201710775661.5A CN201710775661A CN107604150A CN 107604150 A CN107604150 A CN 107604150A CN 201710775661 A CN201710775661 A CN 201710775661A CN 107604150 A CN107604150 A CN 107604150A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000005096 rolling process Methods 0.000 claims abstract description 51
- 238000005554 pickling Methods 0.000 claims abstract description 16
- 238000007747 plating Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 113
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- 239000003513 alkali Substances 0.000 claims description 46
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
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- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of method for suppressing furnace roller of continuous annealing furnace dross, and it is used, and pickling rolls Unit erriger and continuous annealing unit, methods described technique are：5 frame tandem mill groups are used in the pickling rolling Unit erriger；At least F1~F3 working roll carries out plating Cr processing in the Continuous mill train, and roll hardness is not less than 900Hv after plating Cr；The control of F1 working rolls roughness is at 0.3~1.3 micron, and at≤1.1 microns, the roughness of F5 frame working rolls is controlled at 2.0~5.0 microns for the roughness control of F2~F4 working rolls.This method is not related to modification furnace roller coating composition, by the control to two process parameters, so as to suppress furnace roller dross, has reached the purpose for extending annealing furnace roller service life.The furnace roller dross problem for suppressing that continuous annealing furnace occurs using that can reach after this method, at least extend the service life of twice of furnace roller under conditions of using phase same material furnace roller, reach and postpone the effect that continuous annealing furnace blow-on caused by bright spot is overhauled.
Description
Technical field
The present invention relates to continuously annealing steel strip production field, especially a kind of side for suppressing furnace roller of continuous annealing furnace dross
Method.
Background technology
Continuous annealing furnace is in annealing process, inevitably the problem of generation furnace roller dross, once furnace roller knot occurs
Knurl problem, Cold-strip Steel Surface will be caused to produce small load mould, reduce the cold-rolled products surface quality that continuous annealing is produced
Grade.The method for suppressing furnace roller of continuous annealing furnace dross at present is mainly to use the furnace roller of resistive connection knurl coating, the coating master of main flow
Composition is wanted to have composition：Co 35~65%, Cr 20~30%, Ta 10~20%, Al 5~10%, Y 2~5%, partial coating
Also containing elements such as B, spray to form cermet material using explosion method.Its principle is to reduce belt steel surface under the condition of high temperature
The affinity of the elements such as Fe, Mn and furnace roller, the oxide adhesion such as the FeO formed in continuous annealing furnace, MnO, carbon dust is avoided to arrive
Furnace roller surface, reach the purpose for avoiding furnace roller dross.Once furnace roller dross problem occurs and has influence on product surface quality, it is necessary to
Shutdown maintenance, continuous annealing furnace is opened, the dross on furnace roller surface is polished totally with grinding stone or sand paper, be re-closing off burner hearth
It can produce, it is larger to yield and loss of income because shutdown maintenance at least needs the 5 day time that stops production.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method of the good suppression furnace roller of continuous annealing furnace dross of effect.
In order to solve the above technical problems, the technical solution used in the present invention is：Its use pickling rolling Unit erriger and
Continuous annealing unit, methods described technique are：（1）5 frame tandem mill groups are used in the pickling rolling Unit erriger；The company
At least F1~F3 working roll carries out plating Cr processing in milling train group, and roll hardness is not less than 900Hv after plating Cr；F1 working rolls are coarse
Degree control is at 0.3~1.3 micron, and the roughness control of F2~F4 working rolls is at≤1.1 microns, the roughness of F5 frame working rolls
Control is at 2.0~5.0 microns；
（2）In the Continuous mill train, the oil concentration in F1 frame emulsions is according to 4~6% controls, the oil concentration of F2~F4 frames
According to 2~5% controls, the oil concentration of F5 frames is according to 0.5~2.5% control；Iron powder in F1~F4 frame emulsions≤
Iron content≤300ppm in 500ppm, F5 frame emulsion；F1 emulsification flow quantity controls are in 2000~8000L/min, F2
~F4 emulsification flow quantity controls are controlled in 500~6000L/min in 1000~7000 L/min, F5 frames emulsification flow quantity；Breast
Change liquid temperature control at 30~70 DEG C；Emulsion pH value should be controlled 5~7.5；
（3）Cleaning equipment, including spray section, brushing stage, electrolytic cleaned section, rinsing section and drying are provided with the continuous annealing unit
Section；There is squeeze roll barrier between rinsing section and drying section；The alkali lye matched using following weight：Sodium hydroxide 60~80%, former silicon
Sour sodium 10~20%, emulsifying agent 5%~10%, surplus are desalted water；The spray section possesses at least four passage, the alkali lye sprayed
At 70~90 DEG C, concentration of lye controls 1~5% temperature control；The brushing stage arrangement is no less than 4 brush rolls, alkali liquid temperature control
System is at 70~90 DEG C；The electrolytic cleaned section is disposed with least four electrolytic cell, the concentration of lye control in electrolytic cell 2~7%,
Alkali liquid temperature is controlled at 70~90 DEG C, and the current density of battery lead plate is controlled in 200~800A/m in electrolytic cell2；The rinsing section
At least it should be rinsed using three-level, at 70~90 DEG C, washings use desalted water, first order rinsing section desalted water for rinse temperature control
Electrical conductivity control rinses section desalination water power in≤50 μ s, the control of second level rinsing section desalination water conductivity in≤30 μ s, the third level
Conductance is controlled in≤20 μ s.
Step of the present invention（2）In, there are the nozzle for spraying emulsion, F5 machines before and after the roll of each frames of F1~F4
There is the nozzle of sprinkling emulsion before frame；Each nozzle is in 45 ° with strip with 90~170 ° of ejection alkali lye, nozzle angle.
Step of the present invention（3）In drying section, strip temperature control is at >=110 DEG C after drying.
It is using beneficial effect caused by above-mentioned technical proposal：The present invention is not related to modification furnace roller coating composition, leads to
Cross the control to two process parameters, there is provided a kind of method for suppressing to form furnace roller dross, reached extension and moved back
The purpose of stove furnace roller service life；It the advantage is that iron and steel enterprise by self-technique strength can complete phase after getting the gist
Pass technology rectification, avoids the Technical investment of complexity and high Innovation Input.Using suppression can be reached after the present invention
The furnace roller dross problem of continuous annealing furnace, at least extend under conditions of using phase same material furnace roller twice of furnace roller using week
Phase, reach and postpone the effect that continuous annealing furnace blow-on caused by bright spot is overhauled.
Embodiment
The method of this suppression furnace roller of continuous annealing furnace dross is using following pickling rolling Unit errigers and continuous annealing machine
Group.This method is by reducing belt steel surface remnants Fe powder, Mn powder, carbon dust so that reduces formation furnace roller knot during continuous annealing
The material of knurl is reduced, to reach the purpose for suppressing the formation of dross in continuous annealing furnace.Pass through the anti-of two crucial finished products of control
Rate is penetrated, to reach the purpose of belt steel surface remnants Fe powder, Mn powder, carbon dust.Two crucial finished products are chill after cold rolling respectively
Finished product after finished product and cleaning.To control reflectivity, this method uses following techniques.
1st, pickling rolling Unit erriger：Cold mill complex is 5 frame tandem mill groups.Milling train reaches rolling lubrication using emulsion
Effect, rolling mill production line possesses monitoring emulsion saponification number, the equipment of emulsion temperature, should possess prison and allocate each cold rolling
The function of oil concentration in frame control emulsion, emulsion supply system should possess emulsion recovery, the function of impurity screening.Milling train
For 4 rollers or 6 roller mills.Producing line possess detection rolling after strip reflectivity instrument, satisfaction meet standard GB/T/
The regulation of T13452.3-92, GB9270-88, GB5211.17-88 to the instrument.
Strip should first carry out overpickling before entering cold mill complex, and belt steel surface answers white or micro- brown color, band before rolling
Steel surface should not the iron scale containing Surfaces of Hot Rolled Strip.In order to reduce the Fe powder of the chill belt steel surface, Mn powder, carbon
Powder, this method reflect the content of belt steel surface Fe powder, Mn powder, carbon dust using strip reflectivity.This method proposes cold rolling
The reflectivity of chill strip should reach more than 70% afterwards.In order to reach chill finished product reflectivity after the cold rolling described in this method
Purpose, rolling should meet following technical process control.
（1.1）Sour rolling mill at least F1~F3 working roll should carry out plating Cr processing, and Cr thickness degree is no less than 1.5 microns.
If reaching more preferable acid rolls into product reflectivity, working roll plating Cr quantity should be greater than being equal to three frames, F1~F3 this first three
The work roll of individual frame is the main frame for influenceing strip finished product reflectivity.The sequence number of F1~F3 frames meets that strip enters
Enter the sequencing of milling train, the frame numbering of rolled band steel is F1 at first, and by that analogy, F5 is the machine of last rolled band steel
Frame.
（1.2）After roll plating Cr, roller surface hardness number improves.Roll Vickers hardness is not lower than 800Hv before plating Cr, plates
Roll hardness is not lower than 900Hv after Cr.Higher roll hardness is advantageous to avoid roller surface from answering iron caused by rolling friction
Powder adhesion is in belt steel surface, so as to reduce the iron content of belt steel surface.
（1.3）F1 working rolls roughness should be controlled in the range of 0.3~1.3 micron, the roughness of F2~F4 working rolls
It should control in the range of≤1.1 microns, the roughness of F5 frame working rolls should be controlled in the range of 2.0~5.0 microns.F1
The principle of mill stand control roughness range is to avoid the too low rolling of gloss level of roll from stinging steel skidding, while avoids gloss level of roll mistake
Height causes rolling to produce excess iron powder during rubbing, and reduces chill finished product reflectivity.F2~F4 rolls control relatively low as far as possible
Roughness, to reduce to greatest extent because of the iron powder of rolling friction production.F5 frames contain the function of control strip roughness, coarse
Degree should be controlled described in this method in scope.
（1.4）According to above-mentioned（1.1）~（1.3）Described, F1 frames working roll rolling milimeter number should be≤300 kilometers, and F2~
F4 frames working roll rolling milimeter number should be≤400 kilometers, and F5 working rolls rolling milimeter number should be≤250 kilometers；To avoid that public affairs should be surpassed
After mileage rolling causes roll wear, gloss level of roll runaways, and causes a large amount of iron powder adhesions in chill strip table
Face, and then reduce the reflectivity of chill strip.
（1.5）Emulsification oil concentration in F1 frame emulsions controls according to 4~6wt%, to coordinate（1.3）F1 described in clause
Roughness control, the oil concentrations of F2~F4 frames is according to 2~5% controls, to coordinate（1.3）F2~F4's described in clause is coarse
Degree control.The oil concentration of F5 frames is according to 0.5~2.5% control, to coordinate（1.3）The roughness control of F5 described in clause, only
The oil concentration of concentration of emulsion used and each frame are mutually matched the purpose that can be only achieved and improve finished product reflectivity.
（1.6）The saponification number of emulsion answers >=150KOH, should in time more when saponification number is less than this value in production process
Change or add new emulsion.
（1.7）Iron powder in F1~F4 frame emulsions should≤500ppm, F5 frame emulsion in iron content should≤
300ppm。
（1.8）There should be the nozzle of sprinkling emulsion before and after the roll of each frames of F1~F4, there should be sprinkling breast before F5 frames
Change the nozzle of liquid.Nozzle is with 90~170 ° of ejection alkali lye, and preferably with 120 ° of ejection alkali lye, described angle is under the conditions of looking down
With the angle of strip traffic direction；The interval of direction side by side between nozzle is optimal, nozzle with the 2/3 of overlapping ejection alkali lye angle
Angle and strip are in 45 °, and nozzle contacts with the strip position towards roll, and described angle is pre- strip fortune under horizontal observation condition
The angle of line direction.
（1.9）F1 emulsification flow quantity controls in 2000~8000L/min, F2~F4 emulsification flow quantity controls 1000~
The emulsification flow quantity control of 7000L/min, F5 frame is in 500~6000L/min.
（1.10）Emulsion temperature should be controlled in the range of 30~70 DEG C.
（1.11）Emulsion pH value should be controlled in the range of 5~7.5.
By controlling above-mentioned technological parameter in claimed range, so as to ensure that the reflectivity of the chill strip of finished product reaches
More than 70%.
2nd, continuous annealing unit：Annealing unit includes cleaning equipment, and cleaning equipment includes spray, scrub, electrolytic cleaned, drift
The function of wash, drying.Cleaning section brush roll is no less than 12, and brush roll two pairs of rollers are rubber rollers, and cleaning section should possess recycle of alkali liquor filtering
Regeneration function.Alkali lye should be obstructed between cleaning section and rinsing section by squeeze roll and enters rinsing section, rinsing section is at least 3 grades of rinsings,
There should be squeeze roll barrier between rinsing section and drying section.Cleaning section possesses temperature, electrical conductivity, the temperature of detection alkali lye and washings
Function.The main component of furnace roller of continuous annealing furnace is：Co 35~65%, Cr 20~30%, Ta 10~20%, Al 5~
10%, Y 2~5%；The furnace roller of metal ceramic surface of the partial coating also containing elements such as B, annealing temperature are controlled at 1000 DEG C
Hereinafter, comprising annealing soak, slow cooling, rapid cooling, the function of timeliness.The technology controlling and process of continuous annealing is as described below.
（2.1）Continuous annealing spray section should possess at least four passage, and each passage length is 10~15m, and spray section one is downwards
Passage and a upward passage form one group.Spray section should not be less than two groups.
（2.2）For spray section with ground into being arranged vertically, the alkali lye spray of certain temperature is arrived belt steel surface by spray section, is relied on
Spray turbulent flow and Action of Gravity Field, the rolling that alkali lye will adhere in the remaining Fe powder of belt steel surface, Mn powder, carbon dust and cold-rolled process
Strip is left in emulsion cleaning.
（2.3）For spray section nozzle with strip traffic direction reversely in 45 ° of arrangements, described angle is under horizontal observation condition
The angle of pre- strip traffic direction.Each passage arrangement at least 4~8 groups of nozzles, every group of nozzle uniform intervals in passage.Nozzle
With 90 °~170 ° ejection alkali lye, described angle is the angle with strip traffic direction under the conditions of looking down；It is square side by side between nozzle
To interval with overlapping ejection alkali lye angle 2/3 be optimal.Laterally spray length should be greater than being equal to strip width every group of nozzle.
（2.4）Alkali lye formula is（wt）：Sodium hydroxide 60~80%, sodium orthosilicate 10~20%, emulsifying agent 5%~10%, it is remaining
Measure as desalted water.
（2.5）The concentration of lye of spray section is controlled in the range of 1~5wt%.
（2.6）Spray section alkali liquid temperature is controlled in the range of 70~90 DEG C, is avoided alkali lye boiling or temperature too low, is influenceed
Cleaning performance.
（2.7）After brushing stage should be arranged in spray section, or between two spray sections, or positioned at spray section and electrolysis section
Between.Should not be less than by scrubbing segment number by 3 sections.
（2.8）Each brushing stage should arrange no less than 4 brush rolls.Strip arrangement parallel to the ground, brushing stage in brushing stage
Length is 10~20m.In front of brush roll should at least one group of nozzle spray alkali lye to strip.Spray section nozzle and strip traffic direction
Reversely in 45 ° of arrangements, described angle is the angle of pre- strip traffic direction under horizontal observation condition.Nozzle is with 90~170 ° of sprays
Go out alkali lye, described angle is the angle with strip traffic direction under the conditions of looking down；Between nozzle side by side the interval in direction with weight
The 2/3 of folded ejection alkali lye angle is optimal.Laterally spray length should be greater than being equal to strip width every group of nozzle.
（2.9）Brush roll bristle should be organic plastics material, avoid that chemistry reflection occurs with strip or alkali lye.Brush roll rotation side
To should be opposite with strip traffic direction.The alkali liquid temperature of brushing stage is controlled at 70~90 DEG C, and concentration of lye is 1~5wt%.
（2.10）Cleaning section should at least possess 4 passage electrolytic cleaned sections, and each passage length of cleaning section is 10~15m.
The interior strip arrangement of electrolytic cleaned section should be electrolysed in section perpendicular to ground and be disposed with electrolytic cell, electrolytic cell immersion strip, alkali lye liquid
Battery lead plate is disposed with before and after strip under position.
（2.11）The current density of battery lead plate is controlled in 200~800A/m2In the range of.
（2.12）To ensure the cleaning performance of electrolytic cleaned, the concentration of lye of electrolytic cleaned is controlled in the range of 2~7%.
Alkali liquid temperature is controlled in the range of 70~90 DEG C.
（2.13）Rinse section should at least three-level rinsing function, rinse temperature control in the range of 70~90 DEG C.Drift
Wash water uses desalted water.First order rinsing section desalination water conductivity control is in the range of≤50 μ s, second level rinsing section desalination
Water conductivity is controlled in the range of≤30 μ s, and third level rinsing section desalination water conductivity control is in the range of≤20 μ s.
（2.14）Rinsing should dry strip into drying plant after terminating.Scope of the drying temperature control at >=110 DEG C
It is interior.
Embodiment 1：The method of this suppression furnace roller of continuous annealing furnace dross uses following concrete technologies.
（1）Pickling rolling mill practice：Rolling Production specification is 1250*1.0mm DC03, and pickling rolling uses 4 roller mills,
Continuous annealing unit post-processes unit to anneal, and the reflectivity of chill strip is 80% after cold rolling, the F1-F3 of sour rolling mill
Working roll carry out plate Cr processing, 1.8 μm of thickness, hardness plate Cr after be 972Hv.F1 frames rolling milimeter number is 250 kilometers,
F2~F4 frames rolling milimeter number is 300 kilometers, and F5 rolling milimeter numbers are 200 kilometers；F1, F5 working roll roughness is respectively
0.6 μm and 3 μm（Emulsion oil concentration is respectively 5%, 1.5%）, F2~F4 working rolls roughness is 0.6~0.8 μm（Emulsion oil
Concentration 2~4%）；Wherein the saponification number of emulsion is 180KOH, and temperature control is at 50 DEG C, and pH value 6, flow controls
3000L/min；The iron powder of F1-F4 emulsions is 350ppm, and F5 emulsions iron powder is 200ppm；There is sprinkling emulsion before F5 frames
Nozzle, have nozzle before and after F1-F4 frames, the reflectivity of strip is up to 95% after cleaning.
（2）Continuous annealing process：Annealing unit includes cleaning equipment, cleaning equipment include spray, scrub, electrolytic cleaned,
Rinsing and the function of drying.Continuous annealing spray section ground is divided into two groups into being arranged vertically, 4 passages, nozzle and strip traffic direction
Reversely in 45 ° of arrangements, the concentration of lye of spray is 5%, and temperature is 85 DEG C, and alkali lye formula is：80% sodium hydroxide, 10% orthosilicic acid
Sodium, 5% emulsifying agent, 5% desalted water；Brushing stage has 3 sections, and per segment length 18m, every section has 4 brush rolls, and alkali liquid temperature is 75 DEG C, alkali
Liquid concentration is 5%；Electrolytic cleaned section concentration of lye is 6%, and temperature is 90 DEG C, the electrode wherein arranged under alkali lye position before and after strip
Plate density is 750A/m2；Rinsing section after cleaning section has a three-level rinsing function, and rinse temperature control is at 70~80 DEG C, the first order
Rinse the control of section desalination water conductivity and rinse section in 17 μ s, the third level in 45 μ s, the control of second level rinsing section desalination water conductivity
Desalination water conductivity is controlled in 8 μ s；Rinsing dries strip into drying plant after terminating, and drying temperature is 150 DEG C.
Embodiment 2：The method of this suppression furnace roller of continuous annealing furnace dross uses following concrete technologies.
（1）Pickling rolling mill practice：Rolling Production specification is 1350*1.5mm DC06, and pickling rolling uses 4 roller mills,
Continuous annealing unit post-processes unit to anneal, and the reflectivity of chill strip is 72% after cold rolling, the F1-F4 of sour rolling mill
Working roll carries out plating Cr processing, 1.9 μm of thickness, and hardness plates 980Hv after Cr.F1 frames rolling milimeter number is 260 kilometers, F2-
F4 frames rolling milimeter number is 310 kilometers, and F5 rolling milimeter numbers are 190 kilometers；F1, F5 working roll roughness are respectively 0.8 μm
With 4 μm (emulsion oil concentration is respectively 4.5%, 2.0%), F2-F4 working rolls roughness is 0.6~0.8 μm of (emulsion oil concentration
2~4%), the front and rear nozzle for being provided with sprinkling emulsion of frame, the wherein saponification number of emulsion is 170KOH, and temperature is 60 DEG C, pH
It is worth for 7, flow is controlled in 3500L/min；The iron powder of F1-F4 emulsions is 300ppm, and F5 emulsions iron powder is 160ppm；Clearly
The reflectivity of rear strip is washed up to 94%.
（2）Continuous annealing process：Annealing unit includes cleaning equipment, cleaning equipment include spray, scrub, electrolytic cleaned,
Rinsing and the function of drying.Continuous annealing spray section ground is divided into two groups into being arranged vertically, 5 passages, nozzle and strip traffic direction
Reversely in 45 ° of arrangements, the concentration of lye of spray is 3%, and temperature is 90 DEG C, and alkali lye formula is：60% sodium hydroxide, 20% orthosilicic acid
Sodium, 7% emulsifying agent, 13% desalted water；Brushing stage has 4 sections, and per segment length 10m, every section has 4 brush rolls, and alkali liquid temperature is 70 DEG C, alkali
Liquid concentration is 4%；Electrolytic cleaned section concentration of lye is 2%, temperature is 75 DEG C, the electrode wherein arranged under alkali lye position before and after strip
Plate density is 300A/m2；Rinsing section after cleaning section has a level Four rinsing function, and rinse temperature control is at 80~90 DEG C, the first order
Rinse the control of section desalination water conductivity and rinse section in 25 μ s, the third level in 48 μ s, the control of second level rinsing section desalination water conductivity
Desalination water conductivity is controlled in 16 μ s；Rinsing dries strip into drying plant after terminating, and drying temperature is 130 DEG C.
Embodiment 3：The method of this suppression furnace roller of continuous annealing furnace dross uses following concrete technologies.
（1）Pickling rolling mill practice：Rolling Production specification is 1200*1.0mm DC05, and pickling rolling uses 4 roller mills,
Continuous annealing unit post-processes unit to anneal, and the reflectivity of chill strip is 62% after cold rolling, the F1-F3 of sour rolling mill
Working roll carry out plate Cr processing, 1.5 μm of thickness, hardness plate Cr after be 913Hv.F1 frames rolling milimeter number is 260 kilometers,
F2~F4 frames rolling milimeter number is 330 kilometers, and F5 rolling milimeter numbers are 250 kilometers；F1, F5 working roll roughness is respectively
0.3 μm and 2 μm（Emulsion oil concentration is respectively 4%, 0.5%）, F2~F4 working rolls roughness is 0.8~1.1 μm（Emulsion oil
Concentration 2~3%）, wherein the saponification number of emulsion be 170KOH, temperature control at 70 DEG C, pH value 7.5；F1 flows are 2000L/
Min, F2~F4 flow are controlled in 7000L/min, and F5 flows are 6000L/min；The iron powder of F1-F4 emulsions is 450ppm,
F5 emulsions iron powder is 250ppm；There is the nozzle of sprinkling emulsion before F5 frames, have nozzle before and after F1-F4 frames, after cleaning
The reflectivity of strip is up to 78%.
（2）Continuous annealing process：Annealing unit includes cleaning equipment, cleaning equipment include spray, scrub, electrolytic cleaned,
Rinsing and the function of drying.Continuous annealing spray section ground is divided into two groups into being arranged vertically, 4 passages, nozzle and strip traffic direction
Reversely in 45 ° of arrangements, the concentration of lye of spray is 4%, and temperature is 70 DEG C, and alkali lye formula is：70% sodium hydroxide, 15% orthosilicic acid
Sodium, 10% emulsifying agent, 5% desalted water；Brushing stage has 3 sections, and per segment length 10m, every section has 6 brush rolls, and alkali liquid temperature is 90 DEG C, alkali
Liquid concentration is 5%；Electrolytic cleaned section concentration of lye is 7%, temperature is 70 DEG C, the electrode wherein arranged under alkali lye position before and after strip
Plate density is 200A/m2；Rinsing section after cleaning section has a level Four rinsing function, and rinse temperature control is at 75~85 DEG C, the first order
Rinse the control of section desalination water conductivity and rinse section in 20 μ s, the third level in 40 μ s, the control of second level rinsing section desalination water conductivity
Desalination water conductivity is controlled in 10 μ s；Rinsing dries strip into drying plant after terminating, and drying temperature is 120 DEG C.
Embodiment 4：The method of this suppression furnace roller of continuous annealing furnace dross uses following concrete technologies.
（4）Pickling rolling mill practice：Rolling Production specification is 1310*1.0mm DC04, and pickling rolling uses 4 roller mills,
Continuous annealing unit post-processes unit to anneal, and the reflectivity of chill strip is 57% after cold rolling, the F1-F3 of sour rolling mill
Working roll carry out plate Cr processing, 1.9 μm of thickness, hardness plate Cr after be 901Hv.F1 frames rolling milimeter number is 300 kilometers,
F2~F4 frames rolling milimeter number is 400 kilometers, and F5 rolling milimeter numbers are 240 kilometers；F1, F5 working roll roughness is respectively
1.3 μm and 5.0 μm（Emulsion oil concentration is respectively 6%, 2.5%）, F2~F4 working rolls roughness is 1.0~1.1 μm（Emulsion
Oil concentration 4~5%）, the saponification number of wherein emulsion is 150KOH, temperature control in 30 DEG C, pH value 5, F1 flows are 8000L/
Min, F2~F4 flow are controlled in 1000L/min, and F5 flows are 500L/min；The iron powder of F1-F4 emulsions is 500ppm,
F5 emulsions iron powder is 300ppm；There is the nozzle of sprinkling emulsion before F5 frames, have nozzle before and after F1-F4 frames, after cleaning
The reflectivity of strip is up to 83%.
（4）Continuous annealing process：Annealing unit includes cleaning equipment, cleaning equipment include spray, scrub, electrolytic cleaned,
Rinsing and the function of drying.Continuous annealing spray section ground is divided into two groups into being arranged vertically, 5 passages, nozzle and strip traffic direction
Reversely in 45 ° of arrangements, the concentration of lye of spray is 1%, and temperature is 90 DEG C, and alkali lye formula is：75% sodium hydroxide, 12% orthosilicic acid
Sodium, 8% emulsifying agent, 5% desalted water；Brushing stage has 3 sections, and per segment length 13m, every section has 4 brush rolls, and alkali liquid temperature is 80 DEG C, alkali
Liquid concentration is 1%；Electrolytic cleaned section concentration of lye is 5%, temperature is 90 DEG C, the electrode wherein arranged under alkali lye position before and after strip
Plate density is 800A/m2；Rinsing section after cleaning section has a level Four rinsing function, and rinse temperature control is at 75~85 DEG C, the first order
Rinse the control of section desalination water conductivity and rinse section in 30 μ s, the third level in 50 μ s, the control of second level rinsing section desalination water conductivity
Desalination water conductivity is controlled in 20 μ s；Rinsing dries strip into drying plant after terminating, and drying temperature is 110 DEG C.
Comparative example：When Handan Iron and Steel Co Handan treasured cold rolling mill uses former technique, water of the chill belt steel surface reflectivity control 30~60%
It is flat, the level more than >=70% is controlled using chill belt steel surface reflectivity after this method；Strip reflectivity is being adopted after cleaning
With level of the control 50~70% during former technique, using level of the control more than >=90% after this method.Continuous annealing furnace stove
Roller dross phenomenon significantly improves, and stop within 4 months a line blow-on thorax furnace roller of polishing using need during former technique, after this method
Only need to stop within 1 year a line blow-on thorax furnace roller of polishing；It is annual to reduce 28 days repair times.
Claims (3)
1. a kind of method for suppressing furnace roller of continuous annealing furnace dross, it uses pickling rolling Unit erriger and continuous annealing unit,
Characterized in that, methods described technique is：（1）5 frame tandem mill groups are used in the pickling rolling Unit erriger；The tandem rolling
At least F1~F3 working roll carries out plating Cr processing in unit, and roll hardness is not less than 900Hv after plating Cr；F1 working roll roughness
Control is at 0.3~1.3 micron, and the roughness control of F2~F4 working rolls is at≤1.1 microns, the roughness control of F5 frame working rolls
System is at 2.0~5.0 microns；
（2）In the Continuous mill train, the oil concentration in F1 frame emulsions is according to 4~6% controls, the oil concentration of F2~F4 frames
According to 2~5% controls, the oil concentration of F5 frames is according to 0.5~2.5% control；Iron powder in F1~F4 frame emulsions≤
Iron content≤300ppm in 500ppm, F5 frame emulsion；F1 emulsification flow quantity controls are in 2000~8000L/min, F2
~F4 emulsification flow quantity controls are controlled in 500~6000L/min in 1000~7000 L/min, F5 frames emulsification flow quantity；Breast
Change liquid temperature control at 30~70 DEG C；Emulsion pH value should be controlled 5~7.5；
（3）Cleaning equipment, including spray section, brushing stage, electrolytic cleaned section, rinsing section and drying are provided with the continuous annealing unit
Section；There is squeeze roll barrier between rinsing section and drying section；The alkali lye matched using following weight：Sodium hydroxide 60~80%, former silicon
Sour sodium 10~20%, emulsifying agent 5%~10%, surplus are desalted water；The spray section possesses at least four passage, the alkali lye sprayed
At 70~90 DEG C, concentration of lye controls 1~5% temperature control；The brushing stage arrangement is no less than 4 brush rolls, alkali liquid temperature control
At 70~90 DEG C, concentration of lye controls in 1~5wt% system；The electrolytic cleaned section is disposed with least four electrolytic cell, in electrolytic cell
Concentration of lye control 2~7%, alkali liquid temperature is controlled at 70~90 DEG C, in electrolytic cell the current density control of battery lead plate exists
200~800A/m2；The rinsing section should be rinsed at least using three-level, and rinse temperature control is at 70~90 DEG C, and washings are using de-
Salt solution, first order rinsing section desalination water conductivity control are controlled in≤30 μ in≤50 μ s, second level rinsing section desalination water conductivity
S, third level rinsing section desalination water conductivity control is in≤20 μ s.
2. the method according to claim 1 for suppressing furnace roller of continuous annealing furnace dross, it is characterised in that：The step（2）
In, there is the nozzle for spraying emulsion before and after the roll of each frames of F1~F4, the nozzle for having sprinkling emulsion before F5 frames；Often
Individual nozzle is in 45 ° with strip with 90~170 ° of ejection alkali lye, nozzle angle.
3. the method according to claim 1 or 2 for suppressing furnace roller of continuous annealing furnace dross, it is characterised in that：The step
（3）In drying section, strip temperature control is at >=110 DEG C after drying.
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| CN108517464A (en) * | 2018-05-15 | 2018-09-11 | 首钢集团有限公司 | A method of eliminating BH surface of steel plate needle point defects |
| CN108715919A (en) * | 2018-06-28 | 2018-10-30 | 江苏省沙钢钢铁研究院有限公司 | Method for eliminating pockmarks on surface of cold-rolled common plate continuous annealing strip steel |
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| 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 |
| CN111014315A (en) * | 2019-12-20 | 2020-04-17 | 马钢(合肥)板材有限责任公司 | Method for improving surface reflectivity of rolled hard coil strip steel |
| CN113522968A (en) * | 2021-07-07 | 2021-10-22 | 本钢板材股份有限公司 | Method for improving surface cleanliness of steel for automobile panel |
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| CN111014315B (en) * | 2019-12-20 | 2021-08-27 | 马钢(合肥)板材有限责任公司 | Method for improving surface reflectivity of rolled hard coil strip steel |
| CN113522968A (en) * | 2021-07-07 | 2021-10-22 | 本钢板材股份有限公司 | Method for improving surface cleanliness of steel for automobile panel |
| CN113664037A (en) * | 2021-07-23 | 2021-11-19 | 山东钢铁集团日照有限公司 | Production method of cold-rolled IF steel with high surface cleanliness |
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