CN105170667B - Scale removal method for hot-rolled narrow strips - Google Patents
Scale removal method for hot-rolled narrow strips Download PDFInfo
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- CN105170667B CN105170667B CN201510473490.1A CN201510473490A CN105170667B CN 105170667 B CN105170667 B CN 105170667B CN 201510473490 A CN201510473490 A CN 201510473490A CN 105170667 B CN105170667 B CN 105170667B
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Abstract
The invention discloses a scale removal method for hot-rolled narrow strips, and belongs to the technical field of scale removal methods for hot-rolled narrow strips. The method is used for intermediate and precision rolling scale removal of hot-rolled narrow strips. A traditional high pressure water scale removal position is changed. A spray gun is installed behind an intermediate rolling or precision rolling edging mill. Meanwhile, a groove and an opening are formed in a steel through guide groove base plate between the edging mill and a roller mill. A strip billet deforms after passing through the edging mill. Secondary oxide scale on the surface of the strip billet cracks, and at the moment, high-speed water flow is utilized for striking the secondary oxide scale on the upper surface of the strip billet to remove the secondary oxide scale. Meanwhile, the oxide scale on the lower surface of the strip billet is removed through friction and water flow scouring by means of the steel through guide groove base plate, and the good scale removal effect is achieved. The scale removal method is simple in manufacturing, convenient to implement, small in investment, small in water consumption, small in consumption after being used, convenient to maintain and capable of obviously improving the strip steel surface quality. According to the scale removal method, constraints in the prior art are broken through, and the scale removal method is an innovation of the hot-rolled narrow strip scale removal technology and has the remarkable economic benefits.
Description
Technical field
The present invention relates to a kind of descaling method of mill coil, the middle finish rolling de-scaling of mill coil is particularly well-suited to,
Belong to mill coil descaling method technical field.
Background technology
At present, the cold rolled narrow strip producer of some production high-quality, all surface quality to mill coil is proposed more
Requirement high, in order to prevent the press-in of oxide skin in the operation of rolling, influences the surface quality of strip, mill coil factory
Family, typically will remove secondary iron scale, some documents referred to as secondary descaling steel in middle finish rolling.
At present, the widely used high-pressure water descaling of iron and steel enterprise of various countries or big edger roll scale breading, and it is equipped with what high pressure water jets were removed
Technique, secondary descaling steel equipment have before middle finish rolling, have installed between the frame of hot fine rolling unit.Using water under high pressure
The special high-pressure water scale removal equipment of descaling process is high to water quality requirement, it is necessary to water purification, and the pressure of water is general in 8-12MPa, has
Even more high, it is necessary to special pressurized equipment and special nozzle, High-Pressure Water is sprayed against made-up belt upper and lower surface simultaneously,
Reach de-scaling purpose.These equipment and automatically controlled instrument are required for special installing space, in addition, it is desirable to lay special pipeline connection
Water receiving source, pressurized equipment and De-scaling box, investment are big, install inconvenient, and after use, consumption is big, not easy care.
The method that de-scaling is also carried out using low pressure water flow, China Patent No. CN200880109627 is disclosed one kind and passed through
Low hydraulic pressure water is injected into method and apparatus of the row metal with secondary descaling steel, using 3-30 bars（About 0.3-3MPa）Hydraulic pressure,
Roughing mills or intermediate mill upstream, de-scaling is carried out using special nozzle.The method that de-scaling is carried out with low pressure water flow, is thick
Milling train group or intermediate mill upstream, using 3-30 bars（About 0.3-3MPa）Pressure jet, against made-up belt upper surface and
Lower surface sprays high-velocity flow simultaneously, made-up belt surface temperature is reduced to 600 DEG C, secondary iron scale because the original expanded with heat and contract with cold
Cause, shrinkage cracking, removal is washed away by the high-velocity flow of post-injection.This method, is usually carried out to high-pressure water descaling system
Optimizing Reconstruction, using existing equipment pipeline, or, a set of water system of oneself is specially set up, it is necessary to lay special pipeline connection
Water receiving source, De-scaling box, or even the pressurized equipment of water is also required to, and invest larger, water consumption is more, installs inconvenient, big using post consumption,
Not easy care.
The content of the invention
The technical problems to be solved by the invention provide a kind of descaling method for mill coil, this descaling method
The finish rolling de-scaling suitable for mill coil, invests small, making and is simple and convenient to operate, and totally can thoroughly remove hot rolling
The secondary iron scale on made-up belt surface.
Solving the technical scheme of above-mentioned technical problem is：
A kind of descaling method for mill coil, it is carried out using following steps：
A. fluting on steel guide groove base plate, opening are crossed between vertical miller and flat roll mill；
B. spray gun is fixed on behind vertical miller, positioned at the side for the crossing steel guide groove top of transmission side, the spout direction of spray gun
The made-up belt for crossing steel guide groove base plate process with vertical miller is relative；
C. before crossing steel, compressed air control valve door is first opened, then opens water source control valve, with gun controls spout opening
The screw of degree is adjusted together, reaches ideal jet effect；
D. the made-up belt from vertical miller out, both sides are deformed, scale on surface rupture, upper surface iron scale
Be eliminated under the high-velocity flow strike of spray gun, lower surface iron scale under with the washing away for crossing the friction of steel guide groove and current,
Also come off clean；
E. the made-up belt for having removed squama enters next frame flat roll mill, and removed iron scale passed through steel guide groove base plate with water
Bottom land opening discharge.
The above-mentioned descaling method for mill coil, the compressed air that the spray gun is used is conventional compressed air, pressure
Power is 0.3-0.7Mpa, and the water source that spray gun is used is milling train cooling water, and hydraulic pressure is 0.01-0.2Mpa.
The above-mentioned descaling method for mill coil, the spray gun is by water inlet pipe, air inlet pipe, nozzle, spout adjustment spiral shell
Bolt is constituted, and air inlet pipe is connected to the rear portion of nozzle, and water inlet pipe is connected to the side of air inlet pipe, has between air inlet pipe and water inlet pipe
The angle of 15-30 degree, spout adjustment bolt is arranged on the nozzle of nozzle.
The beneficial effects of the invention are as follows：
The present invention changes the de-scaling position of traditional water under high pressure, is rolled during high-pressure water spraying gun is arranged on or finish rolling edger roll
Behind milling train, while crossing on steel guide groove base plate between vertical miller and flat roll mill is slotted, made-up belt is by after vertical miller
It is deformed, at this moment the secondary iron scale rupture on its surface breaks the secondary iron scale in made-up belt upper surface using high-velocity flow
Hit and dispose, while utilizing steel guide groove base plate, by friction, current scour, remove the iron scale of made-up belt lower surface, reach
Good scale removal effect.
The present invention is made and is simple and convenient to operate, and existing equipment simply can be transformed, and the small, water consumption of investment is few, installation
It is efficient and convenient, using post consumption it is small, be easy to safeguard, strip surface quality can be obviously improved.
The present invention breaches the constraint of prior art, is the innovation of mill coil technique of scale removal, is taken with simple improvement
Significant effect was obtained, with significant economic benefit, was worth popularization and application in industry.
Specific embodiment
The present invention is a kind of simple descaling method for mill coil, including de-scaling position, de-scaling power source, de-scaling
Medium and iron scale manner of cleaning up etc..
After de-scaling position is had been moved to vertical miller from before traditional vertical miller by the present invention, before flat roll mill,
As power, the cooling water used by milling train forms high speed water to compressed air with strip factory building as medium after spray gun mixes
Stream, the iron scale of strike removal made-up belt upper surface, while the fluting on steel guide groove base plate is crossed, using the mechanical friction of fluting
The iron scale of effect removal made-up belt lower surface, by neutrals such as the notches on guide groove base plate, is rushed iron scale using current
Enter trench, reach the purpose of cleaning.
The present invention comprises the following steps：
1st, de-scaling spray gun is made, is typically in charge of with six, spray gun is by water inlet pipe, air inlet pipe, nozzle, spout adjustment bolt
Composition, air inlet pipe is connected to the rear portion of nozzle, and water inlet pipe is connected to the side of air inlet pipe, there is 15- between air inlet pipe and water inlet pipe
30 degree of angle, spout adjustment bolt is arranged on the nozzle of nozzle.Spout needs processing, is open 2-3 millimeters, can adjust big
It is small.
2nd, spray gun be arranged on vertical miller after, before flat roll mill, near the inboard of guide groove（Mill drive side）, using existing
Compressed air line and milling train cooling water pipeline, carry out the source of the gas and water source of adjustable size.The pressure of compressed air is 0.3-
0.7Mpa, water source is milling train cooling water, and hydraulic pressure is 0.01-0.2Mpa.
3rd, using the repair time, by guide groove base plate fluting, opening between vertical miller and flat roll mill, it is ensured that cross steel suitable
Freely.
4th, source of the gas is connected with the air inlet pipe of spray gun with pneumatic hose, is connected the water inlet pipe of water source and spray gun with common sebific duct
Connect, open gas source valve, gradually adjust water source valve, by adjusting spout adjustment bolt to adjust spout size, reach satisfaction
High-velocity flow strike effect.
5th, according to test case, spray gun is fixed, it is desirable to ensure when accident, maintenance etc. need to remove spray gun, energy
It is enough quickly to remove spray gun, in order to avoid damage.
6th, source of the gas, water source valve are opened before crossing steel, is come into operation by adjusting.
Claims (2)
1. a kind of descaling method for mill coil, it is characterised in that：It is carried out using following steps：
A. fluting on steel guide groove base plate, opening are crossed between vertical miller and flat roll mill；
B. spray gun is fixed on behind vertical miller, positioned at the side for the crossing steel guide groove top of transmission side, the spout direction of spray gun with it is vertical
The made-up belt for crossing steel guide groove base plate process of roller mill is relative；
C. before crossing steel, compressed air control valve door is first opened, then opens water source control valve, with gun controls spout opening degree
Screw is adjusted together, reaches ideal jet effect；
D. the made-up belt from vertical miller out, both sides are deformed, scale on surface rupture, and upper surface iron scale is in spray
It is eliminated under the high-velocity flow strike of rifle, lower surface iron scale also takes off under with the washing away for crossing the friction of steel guide groove and current
Fall clean；
E. the made-up belt for having removed squama enters next frame flat roll mill, and removed iron scale passed through the groove of steel guide groove base plate with water
Bottom opening is discharged；
The compressed air that the spray gun is used is conventional compressed air, and pressure is 0.3-0.7Mpa, and the water source that spray gun is used is to roll
Machine cooling water, hydraulic pressure is 0.01-0.2Mpa.
2. the descaling method for mill coil according to claim 1, it is characterised in that：The spray gun is by intaking
Pipe, air inlet pipe, nozzle, spout adjustment bolt composition, air inlet pipe are connected to the rear portion of nozzle, and water inlet pipe is connected to the side of air inlet pipe
Face, the angle for having 15-30 degree between air inlet pipe and water inlet pipe, spout adjustment bolt is arranged on the nozzle of nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473490.1A CN105170667B (en) | 2015-08-05 | 2015-08-05 | Scale removal method for hot-rolled narrow strips |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510473490.1A CN105170667B (en) | 2015-08-05 | 2015-08-05 | Scale removal method for hot-rolled narrow strips |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105170667A CN105170667A (en) | 2015-12-23 |
| CN105170667B true CN105170667B (en) | 2017-05-17 |
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ID=54893354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510473490.1A Active CN105170667B (en) | 2015-08-05 | 2015-08-05 | Scale removal method for hot-rolled narrow strips |
Country Status (1)
| Country | Link |
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| CN (1) | CN105170667B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3307771B2 (en) * | 1993-08-23 | 2002-07-24 | ハンス‐ユルゲン、ガイドール | Means for descaling hot rolled steel sheets |
| CN201558866U (en) * | 2009-10-22 | 2010-08-25 | 江阴市西城钢铁有限公司 | Rolling conduit ferrule for spraying water during steel rolling process |
| CN204412778U (en) * | 2014-11-25 | 2015-06-24 | 北京首钢国际工程技术有限公司 | A kind of hot-strip device for descaling by high-pressure |
| CN204892573U (en) * | 2015-08-14 | 2015-12-23 | 河北钢铁股份有限公司 | Mill coil simply descale spray gun |
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2015
- 2015-08-05 CN CN201510473490.1A patent/CN105170667B/en active Active
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| Publication number | Publication date |
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| CN105170667A (en) | 2015-12-23 |
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