CN103551390B - Improve the method that sendzimir mill rolled band steel surfactant emulsion liquid is residual - Google Patents
Improve the method that sendzimir mill rolled band steel surfactant emulsion liquid is residual Download PDFInfo
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Abstract
The invention provides a kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain, technical parameter before and after rolled band steel and in rolled band steel process is as follows: before rolling, grinding and installation are carried out to the wiper rolls of milling train, the roughness Ra of setting wiper rolls is 0.3-0.6um, and the thick wiping roller absolute altitude of wiper rolls wipes roller absolute altitude height 3-7mm than essence; In the operation of rolling, the travel position that setting air purges is that strip width deducts 40-90mm, sets different emulsion flows according to speed and passage, and conservative control strip edge wave region is within 100mm, and 2-5 passage temperature is within 50-100 DEG C; After rolling terminates, in 0-30 days, band steel is cleaned, annealed.The invention provides a kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain, can ensure that product does not produce surperficial black print, blackspot after cleaning, annealing, can product surface quality be improved.
Description
Technical field
The present invention relates to electrical sheet rolling technical field, particularly a kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain.
Background technology
Sendzimir mill rolling non-oriented electrical steel is more and more widely used, and it is flexible with rhythm of production, Strip Shape Control is superior, thickness control accuracy is high, becomes the important rolling equipment producing non-oriented electrical steel both at home and abroad.But its surface quality problems when producing non-oriented electrical steel becomes the difficult problem of each producer.Especially, when silicone content reaches more than 2.4%, the emulsion that after its rolling, belt steel surface is residual is easier produces surperficial black print, blackspot after cleaning, annealing, thus decreases the degradation product rate of product on a large scale.
In the non-oriented electrical steel sendzimir mill operation of rolling, be conventionally rolled, because emulsion residue is more, strip edge is unrestrained comparatively large, quality of edges cannot be guaranteed, and after product cleaning, annealing, the blemish of larger proportion occurs and demotes.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain, to ensure that the non-oriented electrical steel of rolling, after cleaning, annealing, surperficial black print, blackspot does not occur, thus improve product surface quality.
For solving the problems of the technologies described above, the invention provides a kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain, be applicable to the electrical sheet of Si content between 1.0%-3.2%, it is characterized in that, the technical parameter before and after described sendzimir mill rolled band steel and in rolled band steel process is set as follows:
Sendzimir mill is before rolled band steel, and control emulsion system, control concentration of emulsion used is 2.5-10%, and controlling emulsion temperature is 50-60 DEG C; The pressure that setting air purges is 0.3-0.6MPa; And grinding and installation are carried out to the wiper rolls of described sendzimir mill, the roughness Ra setting described wiper rolls is 0.3-0.6um, and the thick wiping roller absolute altitude setting described wiper rolls wipes roller absolute altitude height 3-7mm than essence.Double-deck wiping rubber leather strap installed by described wiper rolls;
In sendzimir mill rolled band steel process, the travel position that setting air purges is that strip width deducts 40-90mm, regulate the emulsion flow of the first passage salband steel, set the > of inlet of rolling mill emulsion flow described in first passage operation of rolling 0L/min, relative rolling outlet band of position steel temperature controls below 150 DEG C; In the second to the five passes process, described inlet of rolling mill emulsion flow > 1000L/min, milling train outlet emulsion flow > 1000L/min, relative rolling outlet band of position steel temperature controls at 50 DEG C-100 DEG C; Set every time target flatness compliance rate more than 95%, setting edge limit wave region < 100mm;
Sendzimir mill, after rolled band steel terminates, in 0-30 days, cleans described band steel, anneals.
Further, described control emulsion system is the ash content≤600ppm of setting emulsion, iron powder value≤500ppm, acid number≤20ppm.
Further, described sendzimir mill is before rolled band steel, carrying out grinding to the wiper rolls of described sendzimir mill is regularly carry out grinding to described wiper rolls, and described wiper rolls grinding life cycle is less than 3000t, the circularity requirement≤0.005mm after grinding; Wiper rolls roll forming after grinding should meet:
X-represents the extension position (mm) of wiper rolls;
Y-represents the convex value (mm) of wiper rolls.
Further, after the wiper rolls grinding of described sendzimir mill, the roller footpath difference that the essence of described wiper rolls is wiped between roller controls within 1mm, and the roller footpath difference between the thick wiping roller of described wiper rolls controls within 1mm, and the essence of described wiper rolls is wiped roller and slightly wiped roller footpath difference between roller and controls within 1mm.
Further, after the wiper rolls grinding of described sendzimir mill, the wiper rolls cementation zone hardness of described sendzimir mill reaches 70-80HS.
Further, described sendzimir mill is before rolled band steel, and to the installation of the wiper rolls of described sendzimir mill, require that the absolute altitude that the essence of described wiper rolls wipes roller is roll line absolute altitude, the absolute altitude of the thick wiping roller of described wiper rolls is that height of rolling line adds 3-7mm.
Further, the heat resisting temperature of the double-deck wiping rubber leather strap that described wiper rolls is installed is more than 250 DEG C, and the installed height mark of described double-layer rubber leather strap is consistent with roll line absolute altitude.
Further, the emulsion flow of described adjustment first passage salband steel sets as follows:
Emulsion flow (L/min)=500+0.8*V(mpm),
V is the first passage emulsion flow velocity;
And the emulsion flow of described first passage salband steel is maximum is no more than 1100L/Min; The expulsion pressure of described emulsion controls between 300kpa-510kpa.
Further, in the described first passage operation of rolling, air purges the opening direction that opening direction is actual exit position, and the logic entry position of described milling train purges without the need to opening air; When air purges speed <300mpm, logic entrance wiper rolls needs pressure, and as speed >=300mpm, the wiper rolls of logic entrance need lift.
Further, when described logic entrance wiper rolls need be depressed, the force value of depressed state is:
P
essence wipes pressure(kpa)=5.0-5.2L+(900-1000);
P
thick wiping pressure(kpa)=6.2-6.4L+(900-1000);
L is strip width value.
In the operation of rolling of the non-oriented electrical steel of Si content between 1.0%-3.2%, the mechanism that its surperficial black print, blackspot produce is as follows:
In the operation of rolling belt steel surface with iron powder particulate adsorb a large amount of enriched oil, and encase iron powder particulate and become oil film, wherein moisture forms steam and generates iron oxide with iron powder particulate generation chemical reaction, between iron powder particulate, just produce space like this, make steam and additive and steel plate produce oxidation reaction, oxidation position, plate face forms loose iron oxide layer, during annealing heating, forming the Kong Shi district of all round closure, oil gas can not arranged, and enters formation mottling in iron oxide layer.
Fe+H
2O+O
2→FeO+H
2O
The main chemical compositions of blackspot and black print is iron powder.Because heat treatment is the annealing of nitrogen hydrogen mixing+moisture, during annealing, adopt H
2as reducing atmosphere, FeO (OH) is reduced into iron and forms iron powder.Its forming process is:
2FeO(OH)+3H
2=2Fe+4H
2O
A kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain provided by the invention, black print is produced according to surface in the operation of rolling of the non-oriented electrical steel of Si content between 1.0%-3.2%, the mechanism of blackspot, by controlling the associated technical parameters before and after sendzimir mill rolled band steel and in rolled band steel process and setting, band steel emulsion of remained on surface in the operation of rolling can be made significantly to reduce, decrease the moisture content that belt steel surface is residual, decrease water and generate the possibility of iron oxide with the iron generation oxidation reaction in belt steel surface matrix at high operating temperatures, thus significantly reduce band steel black print in surface when annealing, blackspot incidence, achieve the significantly lifting of strip surface quality.
Accompanying drawing explanation
The position absolute altitude schematic diagram of wiper rolls in the method that the improvement sendzimir mill rolled band steel surfactant emulsion liquid that Fig. 1 provides for the embodiment of the present invention remains.
Non-oriented electrical steel black stains in the surface, black print degradation trends figure that the method that the improvement sendzimir mill rolled band steel surfactant emulsion liquid that Fig. 2 provides for the embodiment of the present invention remains is produced.
Detailed description of the invention
A kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain that the embodiment of the present invention provides, be applicable to the electrical sheet of Si content between 1.0%-3.2%, the technical parameter before and after sendzimir mill rolled band steel and in rolled band steel process controls as follows:
Sendzimir mill is before rolled band steel, and control concentration of emulsion used is 2.5-10%, and controlling emulsion temperature is 50-60 DEG C; Carry out grinding and installation to the wiper rolls of sendzimir mill, the roughness Ra of the wiper rolls after grinding is 0.3-0.6um,
Control emulsion system, the travel position that setting air purges is that strip width deducts 40-90mm, and the pressure that setting air purges is 0.3-0.6MPa, and double-deck wiping rubber leather strap installed by wiper rolls;
In sendzimir mill rolled band steel process, regulate the emulsion flow of the first passage salband steel, set the > of inlet of rolling mill emulsion flow described in first passage operation of rolling 0L/min, relative rolling outlet band of position steel temperature controls below 150 DEG C; In the second to the five passes process, inlet of rolling mill emulsion flow > 1000L/min, milling train outlet emulsion flow > 1000L/min, relative rolling outlet band of position steel temperature controls at 50 DEG C-100 DEG C; Set every time target flatness compliance rate more than 95%, setting edge limit wave region < 100mm;
Sendzimir mill, after rolled band steel terminates, in 0-30 days, cleans band steel, anneals.
Wherein controlling emulsion system is the ash content≤600ppm, iron powder value≤500ppm, the acid number≤20ppm that control emulsion.
Wherein, sendzimir mill is before rolled band steel, carrying out grinding to the wiper rolls of sendzimir mill is regularly carry out grinding to wiper rolls, wiper rolls grinding life cycle is less than 3000t, circularity requirement≤0.005mm after grinding, the thick wiping roller absolute altitude of setting wiper rolls wipes roller absolute altitude height 3-7mm than essence, grinding wiper rolls roll forming, confirms that wiper rolls roll forming meets:
X-represents the extension position (mm) of wiper rolls;
Y-represents the convex value (mm) of wiper rolls.Wherein, after the wiper rolls grinding of sendzimir mill, the roller footpath difference that the essence of wiper rolls is wiped between roller controls within 1mm, and the roller footpath difference between the thick wiping roller of wiper rolls controls within 1mm, and the essence of wiper rolls is wiped roller and slightly wiped roller footpath difference between roller and controls within 1mm.
Wherein, after the wiper rolls grinding of sendzimir mill, the wiper rolls cementation zone hardness of sendzimir mill reaches 70-80HS.
Wherein, sendzimir mill, before rolled band steel, is installed the position of the wiper rolls of sendzimir mill, and require that the absolute altitude that the essence of wiper rolls wipes roller is roll line absolute altitude, the absolute altitude of the thick wiping roller of wiper rolls is that height of rolling line adds 3-7mm.
Wherein, the heat resisting temperature of the double-deck wiping rubber leather strap that wiper rolls is installed is more than 250 DEG C, and the installed height mark of double-layer rubber leather strap is consistent with roll line absolute altitude.
Wherein, the emulsion flow regulating the first passage salband steel sets as follows:
Emulsion flow (L/min)=500+0.8*V(mpm),
V is the first passage emulsion flow velocity;
And the emulsion flow of described first passage salband steel is maximum is no more than 1100L/Min; The expulsion pressure of emulsion controls between 300kpa-510kpa.
Wherein, in the first passage operation of rolling, air purges the opening direction that opening direction is actual exit position, and the logic entry position of milling train purges without the need to opening air; When air purges speed <300mpm, logic entrance wiper rolls needs pressure, and as speed >=300mpm, the wiper rolls of logic entrance need lift.
Wherein, when logic entrance wiper rolls need be depressed, the force value of depressed state is:
P
essence wipes pressure(kpa)=5.0-5.2L+(900-1000);
P
thick wiping pressure(kpa)=6.2-6.4L+(900-1000);
L is strip width value.
Embodiment 1
High silicon non-oriented electrical steel Si content 2.0wt%.
Before rolling, emulsion system is controlled, the ash content 300ppm of emulsion, iron powder value 300ppm, acid number 5ppm.Heighten to essence wiping roller absolute altitude+4mm by slightly wiping roller absolute altitude before rolling, wiper rolls most big roller footpath difference is 1mm, wiper rolls roughness is 0.4um, convexity is 0.45mm, wiper rolls life cycle is 3000t, and the circularity after grinding is 0.005mm, and cementation zone hardness reaches 80HS, concentration of emulsion used is adjusted to 2.8%, and emulsion temperature is 50 DEG C.
During rolling, control the expulsion pressure of emulsion at 510kpa.It is 0.6MPa that air purges pressure,
First passage outlet thick wiping roller pressure is 7.3MPa, and it is 6.2MPa that essence wipes pressure; Entrance is slightly wiped as 7.3MPa.
The logic inlet pressure of other passages is 7.3mpa(low speed), do not drop into time (>=300mpm) at a high speed, it is 7.3MPa that roller pressure is wiped in outlet, and it is 6.2MPa that essence wipes pressure.
First passage emulsion flow is 0-1100L/min, controls flow according to speed logic formula, and speed acquisition source is as the criterion to export tachymeter:
Flow (L/min)=500+0.8*V(mpm), max=1100L/Min
Rolling outlet belt steel temperature 73 DEG C, air purges travel position and deducts 90mm for being with steel position, and limit wave actual area is 78mm; Second passage flow is each 3000L/Min in 6000L/Min(gateway), 3rd passage is each 3000L/Min in 6000L/Min(gateway to the flow of the 5th passage), finished product limit wave actual area is 78mm, the plate shape qualification rate of 2-5pass is respectively 98.3,98.3,98.8,99.5%, every time outlet temperature is respectively 77,85,92,98 DEG C, and rolling is along surely carrying out.
After rolling completes, carry out cleaning, annealing after 3 days, surface is without blackspot, black print.
Embodiment 2
High silicon non-oriented electrical steel Si content 2.8wt%.
Before rolling, emulsion system is controlled, the ash content 500ppm of emulsion, iron powder value 400ppm, acid number 2ppm.Heightens to essence wipe roller absolute altitude+5mm by slightly wiping roller absolute altitude before rolling, wiper rolls most big roller footpath difference is 0.8mm, and wiper rolls roughness is 0.5um, convexity is 0.42mm, wiper rolls life cycle is 2000t, and the circularity after grinding is 0.002mm, and cementation zone hardness reaches 80HS.Concentration of emulsion used is adjusted to 8.5%, and emulsion temperature is 60 DEG C.
During rolling, control the expulsion pressure of emulsion at 510kpa.First passage outlet thick wiping roller pressure is 7.3MPa, and it is 6.2MPa that essence wipes pressure; Entrance is slightly wiped as 7.3MPa.
The logic inlet pressure of other passages is 7.3mpa(low speed), do not drop into time (>=300mpm) at a high speed, it is 7.3MPa that roller pressure is wiped in outlet, and it is 6.2MPa that essence wipes pressure.
First passage emulsion flow is 0-1100L/min, controls flow according to speed logic formula, and speed acquisition source is as the criterion to export tachymeter:
Flow (L/min)=500+0.8*V(mpm), max=1100L/Min
Rolling outlet belt steel temperature 80 DEG C, air purges travel position for band steel position-90mm, and limit wave actual area is 78mm; The emulsion flow of the second to the five passage is at 6000L/Min, and limit wave actual area is that the plate shape qualification rate of 78mm, 2-5pass is respectively 98.7,98.8,98.9,99.7%, and every time outlet temperature is respectively 78,88,90,94 DEG C, and rolling is along surely carrying out.
After rolling, after rolling completes, carry out cleaning, annealing after 7 days, surface is without blackspot, black print.
Embodiment 3
High silicon non-oriented electrical steel Si content 3.2wt%, Al content 0.8%.
Before rolling, emulsion system is controlled, the ash content 570ppm of emulsion, iron powder value 500ppm, acid number 1ppm.Heighten to essence wiping roller absolute altitude+5mm by slightly wiping roller absolute altitude before rolling, wiper rolls most big roller footpath difference is 0.8mm, wiper rolls roughness is 0.4um, convexity is 0.42mm, wiper rolls life cycle is 2000t, and the circularity after grinding is 0.002mm, and cementation zone hardness reaches 80HS, concentration of emulsion used is adjusted to 10%, and emulsion temperature is 60 DEG C.
During rolling, control the expulsion pressure of emulsion at 510kpa, the first passage outlet thick wiping roller pressure is 7.3MPa, and it is 6.2MPa that essence wipes pressure; Entrance is slightly wiped as 7.3MPa.
The logic inlet pressure of other passages is 7.3mpa(low speed), do not drop into time (>=300mpm) at a high speed, it is 7.3MPa that roller pressure is wiped in outlet, and it is 6.2MPa that essence wipes pressure.
First passage emulsion flow is 0-1100L/min, controls flow according to speed logic formula, and speed acquisition source is as the criterion to export tachymeter:
Flow (L/min)=500+0.8*V(mpm), max=1100L/Min
Actual (acceleration of the 30m/S) raising speed at a slow speed that adopts carries out the rolling of the first passage to 200mpm, rolling outlet belt steel temperature 120 DEG C, and air purges travel position for band steel position-90mm, and limit wave actual area is 78mm; Second passage is to the rolling of the 3rd passage, the method of raising speed at a slow speed is all adopted to accelerate to 300mpm, 400mpm, 400mpm, 400mpm are rolled, the emulsion flow of the second to the five passage is at 6000L/Min, limit wave actual area is 100mm, the plate shape qualification rate of 2-5pass is respectively 90,92,94,99%, and every time outlet temperature is respectively 78,88,90,94 DEG C, and rolling is along surely carrying out.
After rolling, after rolling completes, tissue enters trimming unit and carries out trimming immediately, carries out cleaning, annealing after 1 day, and surface is without blackspot, black print.
Embodiment 4
High silicon non-oriented electrical steel Si content 1.0wt%, target thickness 0.2mm.
Before rolling, emulsion system is controlled, the ash content 200ppm of emulsion, iron powder value 100ppm, acid number 1ppm.Heighten to essence wiping roller absolute altitude+5mm by slightly wiping roller absolute altitude before rolling, wiper rolls most big roller footpath difference is 0.8mm, wiper rolls roughness is 0.4um, convexity is 0.45mm, wiper rolls life cycle is 2000t, and the circularity after grinding is 0.003mm, and cementation zone hardness reaches 80HS, concentration of emulsion used is adjusted to about 3%, and emulsion temperature is 50 DEG C.
During rolling, coil of strip directly carries out upper volume by crimping machine and is rolled.After threading completes, the action such as position, roll pressure that automatic setting air purges.Drop into the milling trains such as calibrator, tachymeter, plate profile instrument from carrying device.Control the expulsion pressure of emulsion at 510kpa, the first passage outlet thick wiping roller pressure is 7.3MPa, and it is 6.2MPa that essence wipes pressure; Entrance is slightly wiped as 7.3MPa.
The logic inlet pressure of other passages is 7.3mpa(low speed), do not drop into time (>=300mpm) at a high speed, it is 7.3MPa that roller pressure is wiped in outlet, and it is 6.2MPa that essence wipes pressure.
First passage emulsion flow is 1000L/min, and after cycling start, quick raising speed is rolled to 540mpm.Rolling outlet belt steel temperature 80 DEG C, air purges travel position for band steel position-50mm, and limit wave actual area is 30mm; The emulsion flow of the second to the five passage is at each 3000L/min in 6000L/Min(gateway), all carry out quick raising speed to be rolled to 800mpm, 800mpm rolling reach more than 2/3 of the single pass time total time, limit wave actual area is 30mm, the plate shape qualification rate of 2-5pass is respectively 95,97,99,100%, every time outlet temperature is respectively 95,95,95,95 DEG C, and rolling is along surely carrying out.
After rolling, carry out cleaning, annealing after 14 days, surface is without blackspot, black print.
See Fig. 2, a kind of method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain provided by the invention, in the process of sendzimir mill rolled band steel, by controlling the technical parameter relevant to setting, the water that belt steel surface is residual can be decreased, decrease the oxidation reaction that in the operation of rolling, surface matrix iron and water occur, thus significantly reduce non-oriented electrical steel surface black print, blackspot incidence, product defects degradation ratio reduces on a large scale, is reduced to 0.1% from 2%.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. one kind is improved the residual method of sendzimir mill rolled band steel surfactant emulsion liquid, be applicable to the electrical sheet of Si content between 1.0%-3.2%, it is characterized in that, the technical parameter before and after described sendzimir mill rolled band steel and in rolled band steel process is set as follows:
Sendzimir mill is before rolled band steel, and control emulsion system, control concentration of emulsion used is 2.5-10%, and controlling emulsion temperature is 50-60 DEG C; The pressure that setting air purges is 0.3-0.6MPa; And grinding and installation are carried out to the wiper rolls of described sendzimir mill, the roughness Ra setting described wiper rolls is 0.3-0.6um, and the thick wiping roller absolute altitude setting described wiper rolls wipes roller absolute altitude height 3-7mm than essence, and double-deck wiping rubber leather strap installed by described wiper rolls;
In sendzimir mill rolled band steel process, the travel position that setting air purges is that strip width deducts 40-90mm, regulate the emulsion flow of the first passage salband steel, set the > of inlet of rolling mill emulsion flow described in first passage operation of rolling 0L/min, relative rolling outlet band of position steel temperature controls below 150 DEG C; In the second to the five passes process, described inlet of rolling mill emulsion flow > 1000L/min, milling train outlet emulsion flow > 1000L/min, relative rolling outlet band of position steel temperature controls at 50 DEG C-100 DEG C; Set every time target flatness compliance rate more than 95%, setting edge limit wave region < 100mm;
Sendzimir mill, after rolled band steel terminates, in 0-30 days, cleans described band steel, anneals.
2. the method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain according to claim 1, is characterized in that: described control emulsion system, is the ash content≤600ppm of setting emulsion, iron powder value≤500ppm, acid number≤20ppm.
3. the method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain according to claim 1, it is characterized in that, described sendzimir mill is before rolled band steel, carrying out grinding to the wiper rolls of described sendzimir mill is regularly carry out grinding to described wiper rolls, described wiper rolls grinding life cycle is less than 3000t, the circularity requirement≤0.005mm after grinding; Wiper rolls roll forming after grinding should meet:
X-represents the extension position of wiper rolls, and unit is mm;
Y-represents the convex value of wiper rolls, and unit is mm.
4. the method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain according to claim 3, it is characterized in that: after the wiper rolls grinding of described sendzimir mill, the roller footpath difference that the essence of described wiper rolls is wiped between roller controls within 1mm, roller footpath difference between the thick wiping roller of described wiper rolls controls within 1mm, and the essence of described wiper rolls is wiped roller footpath difference between roller and thick wiping roller and controlled within 1mm.
5. the method that the improvement sendzimir mill rolled band steel surfactant emulsion liquid according to any one of claim 3-4 is residual, it is characterized in that, the wiper rolls grinding rear surface hardened layer hardness of described sendzimir mill reaches 70-80HS.
6. the method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain according to claim 1, it is characterized in that: described sendzimir mill is before rolled band steel, to the installation of the wiper rolls of described sendzimir mill, require that the absolute altitude that the essence of described wiper rolls wipes roller is roll line absolute altitude, the absolute altitude of the thick wiping roller of described wiper rolls is that height of rolling line adds 3-7mm.
7. the method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain according to claim 1, it is characterized in that: the heat resisting temperature of the double-deck wiping rubber leather strap that described wiper rolls is installed is more than 250 DEG C, and the installed height mark of described double-layer rubber leather strap is consistent with roll line absolute altitude.
8. the method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain according to claim 1, it is characterized in that, the emulsion flow of described adjustment first passage salband steel sets as follows:
Emulsion flow=500+0.8*V,
Emulsion flux unit is L/min, V is the first passage emulsion flow velocity, and unit is mpm;
And the emulsion flow of described first passage salband steel is maximum is no more than 1100L/Min; The expulsion pressure of described emulsion controls between 300kpa-510kpa.
9. the method improved sendzimir mill rolled band steel surfactant emulsion liquid and remain according to claim 1, it is characterized in that: in the described first passage operation of rolling, air purges the opening direction that opening direction is actual exit position, and the logic entry position of described milling train purges without the need to opening air; When air purges speed <300mpm, logic entrance wiper rolls needs pressure, and as speed >=300mpm, the wiper rolls of logic entrance need lift.
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| CN105983579B (en) * | 2015-02-13 | 2018-04-24 | 鞍钢股份有限公司 | A kind of method for controlling leveling precision residual defects |
| CN106216411B (en) * | 2016-07-26 | 2018-06-22 | 北京首钢冷轧薄板有限公司 | A kind of control method of Cold-strip Steel Surface emulsion trace |
| CN110496864B (en) * | 2019-07-02 | 2022-01-11 | 首钢智新迁安电磁材料有限公司 | Cold rolling equipment and cold rolling treatment method |
| CN112139289A (en) * | 2020-09-08 | 2020-12-29 | 鞍钢股份有限公司 | Method for eliminating splash of photofinishing liquid |
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| JP5626275B2 (en) * | 2011-07-27 | 2014-11-19 | 新日鐵住金株式会社 | Method for cooling hot-rolled steel sheet |
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| CN2889534Y (en) * | 2006-04-11 | 2007-04-18 | 玉溪玉杯金属制品有限公司 | Mechanical scale-removing apparatus |
| CN102476131A (en) * | 2010-11-26 | 2012-05-30 | 宝山钢铁股份有限公司 | Cold rolling method for preventing high-silicon strip steel from being broken |
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