CN105170667A - Scale removal method for hot-rolled narrow strips - Google Patents
Scale removal method for hot-rolled narrow strips Download PDFInfo
- Publication number
- CN105170667A CN105170667A CN201510473490.1A CN201510473490A CN105170667A CN 105170667 A CN105170667 A CN 105170667A CN 201510473490 A CN201510473490 A CN 201510473490A CN 105170667 A CN105170667 A CN 105170667A
- Authority
- CN
- China
- Prior art keywords
- scale removal
- inlet pipe
- spray gun
- scale
- guide groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Metal Rolling (AREA)
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, be specially adapted to the middle finish rolling de-scaling of mill coil, belong to mill coil descaling method technical field.
Background technology
At present, the cold rolled narrow strip producer of some production high-quality, all the surface quality of mill coil is had higher requirement, in order to prevent the press-in of oxide skin in the operation of rolling, the surface quality of influence zone steel, mill coil manufacturer, generally all will remove secondary iron scale in middle finish rolling, some documents are referred to as secondary descaling steel.
At present, iron and steel enterprise of various countries extensively adopts high-pressure water descaling or large edger roll scale breading, and is equipped with the technique that high pressure water jets removes, before what secondary descaling steel equipment had be arranged on middle finish rolling, between the frame being arranged on hot fine rolling unit had.Adopt the special high-pressure water scale removal equipment of high-pressure water descaling technique high to water quality requirement, need water purification, the pressure of water is generally at 8-12MPa, what have is even higher, need special pressurized equipment and special nozzle, facing to made-up belt upper surface and lower surface inject high pressure current simultaneously, reach de-scaling object.These equipment and automatically controlled instrument all need special installing space, and need to lay special pipeline and connect water source, pressurized equipment and De-scaling box, investment is large, installs inconvenient, after using, consumes large, not easy care.
Also has the method adopting low pressure water flow to carry out de-scaling, China Patent No. CN200880109627 discloses a kind of method and apparatus being carried out secondary descaling steel strip by low hydraulic pressure water injection, adopt the hydraulic pressure of 3-30 bar (about 0.3-3MPa), in roughing mills or intermediate mill upstream, special nozzle is adopted to carry out de-scaling.The method of de-scaling is carried out with low pressure water flow, in roughing mills or intermediate mill upstream, adopt the pressure jet of 3-30 bar (about 0.3-3MPa), spray high-velocity flow facing to the upper surface of made-up belt and lower surface simultaneously, made-up belt surface temperature is made to be reduced to 600 DEG C, secondary iron scale is because the reason of expanding with heat and contract with cold, and shrinkage is ftractureed, and is washed away removal by the high-velocity flow of post-injection.This method is generally be optimized transformation to high-pressure water descaling system, uses existing equipment pipeline, or, set up oneself water system a set of specially, need to lay special pipeline and connect water source, De-scaling box, even also need the pressurized equipment of water, investment is comparatively large, and water consumption is many, installs inconvenient, use post consumption is large, not easy care.
Summary of the invention
Technical problem to be solved by this invention provides a kind of descaling method for mill coil, this descaling method is applicable to the middle finish rolling de-scaling of mill coil, invest little, make simple, easy to operate, totally can remove the secondary iron scale on hot-rolled billet surface up hill and dale.
The technical scheme solved the problems of the technologies described above is:
For a descaling method for mill coil, it adopts following steps to carry out:
Crossing on steel guide groove base plate a. between vertical miller and flat roll mill is slotted, opening;
B. spray gun is fixed on after vertical miller, and above the side crossing steel guide groove being positioned at transmission side, the spout direction of spray gun is relative with the made-up belt of the mistake steel guide groove base plate process of vertical miller;
C. before crossing steel, first open compressed air control valve door, then open water source by-pass valve control, regulate together with the screw of gun controls spout opening degree, reach ideal jet effect;
D. from vertical miller made-up belt out, both sides are extruded distortion, and scale on surface breaks, and upper surface iron scale is eliminated under the high-velocity flow of spray gun hits, lower surface iron scale with cross steel guide groove rub and current washing away under, also come off totally;
E. the made-up belt having removed squama enters next frame flat roll mill, and the bottom land opening that removed iron scale passed through steel guide groove base plate with water is discharged.
The above-mentioned descaling method for mill coil, the compressed air that described spray gun uses is conventional compressed air, and pressure is 0.3-0.7Mpa, and the water source that spray gun uses is milling train cooling water, and hydraulic pressure is 0.01-0.2Mpa.
The above-mentioned descaling method for mill coil, described spray gun is adjusted bolt formed by water inlet pipe, air inlet pipe, nozzle, spout, air inlet pipe is connected to the rear portion of nozzle, water inlet pipe is connected to the side of air inlet pipe, have the angle of 15-30 degree between air inlet pipe and water inlet pipe, spout adjustment bolt is arranged on the nozzle of nozzle.
The invention has the beneficial effects as follows:
The present invention changes the de-scaling position of traditional water under high pressure, to roll during high-pressure water spraying gun is arranged on or after finish rolling vertical miller, crossing on steel guide groove base plate simultaneously between vertical miller and flat roll mill is slotted, made-up belt is by producing distortion after vertical miller, the secondary iron scale on its surface breaks, at this moment utilize high-velocity flow that secondary for made-up belt upper surface iron scale is hit to dispose, utilized steel guide groove base plate simultaneously, by friction, current scour, remove the iron scale of made-up belt lower surface, reach good scale removal effect.
The present invention makes simple, easy to operate, simply can transform existing equipment, invest little, water consumption is few, convenience quick for installation, use post consumption little, be convenient to safeguard, obviously can improve strip surface quality.
The present invention breaches the constraint of prior art, is the innovation of mill coil technique of scale removal, achieves significant effect, have significant economic benefit simply to improve, and is worth in industry applying.
Detailed description of the invention
The present invention is a kind of simple and easy descaling method for mill coil, comprises de-scaling position, de-scaling power source, de-scaling medium and iron scale manner of cleaning up etc.
The present invention by de-scaling position from traditional vertical miller be advanced to vertical miller after, before flat roll mill, with the compressed air in strip mill room for power, with milling train cooling water used for medium, high-velocity flow is formed after being mixed by spray gun, hit the iron scale removing made-up belt upper surface, crossing the fluting on steel guide groove base plate simultaneously, the mechanical friction effect of fluting is utilized to remove the iron scale of made-up belt lower surface, by neutrals such as the notches on guide groove base plate, utilize current that iron scale is poured trench, reach the object of cleaning.
The present invention includes following steps:
1, de-scaling spray gun is made, general use six is in charge of, spray gun is adjusted bolt formed by water inlet pipe, air inlet pipe, nozzle, spout, air inlet pipe is connected to the rear portion of nozzle, water inlet pipe is connected to the side of air inlet pipe, have the angle of 15-30 degree between air inlet pipe and water inlet pipe, spout adjustment bolt is arranged on the nozzle of nozzle.Spout needs processing, and opening 2-3 millimeter, can adjust size.
2, after spray gun is arranged on vertical miller, before flat roll mill, near the inboard (mill drive side) of guide groove, utilizes existing compressed air line and milling train cooling water pipeline, carry out source of the gas and the water source of adjustable size.Compressed-air actuated pressure is 0.3-0.7Mpa, and water source is milling train cooling water, and hydraulic pressure is 0.01-0.2Mpa.
3, utilize the repair time, by guide groove base plate fluting, opening between vertical miller and flat roll mill, ensure that steel was smooth and easy.
4, with pneumatic hose, source of the gas is connected with the air inlet pipe of spray gun, with common sebific duct, water source is connected with the water inlet pipe of spray gun, opens gas source valve, regulate water source valve gradually, by adjustment spout adjustment bolt to regulate spout size, reach satisfied high-velocity flow strike effect.
5, according to test case, spray gun is fixed, require to ensure, when accident, maintenance etc. need to remove spray gun, spray gun to be removed fast, in order to avoid damage.
6, cross steel front by source of the gas, water source valve open, adjust and can come into operation.
Claims (3)
1. for a descaling method for mill coil, it is characterized in that: it adopts following steps to carry out:
Crossing on steel guide groove base plate a. between vertical miller and flat roll mill is slotted, opening;
B. spray gun is fixed on after vertical miller, and above the side crossing steel guide groove being positioned at transmission side, the spout direction of spray gun is relative with the made-up belt of the mistake steel guide groove base plate process of vertical miller;
C. before crossing steel, first open compressed air control valve door, then open water source by-pass valve control, regulate together with the screw of gun controls spout opening degree, reach ideal jet effect;
D. from vertical miller made-up belt out, both sides are extruded distortion, and scale on surface breaks, and upper surface iron scale is eliminated under the high-velocity flow of spray gun hits, lower surface iron scale with cross steel guide groove rub and current washing away under, also come off totally;
E. the made-up belt having removed squama enters next frame flat roll mill, and the bottom land opening that removed iron scale passed through steel guide groove base plate with water is discharged.
2. the descaling method for mill coil according to claim 1, is characterized in that: the compressed air that described spray gun uses is conventional compressed air, and pressure is 0.3-0.7Mpa, and the water source that spray gun uses is milling train cooling water, and hydraulic pressure is 0.01-0.2Mpa.
3. the descaling method for mill coil according to claim 2, it is characterized in that: described spray gun is adjusted bolt formed by water inlet pipe, air inlet pipe, nozzle, spout, air inlet pipe is connected to the rear portion of nozzle, water inlet pipe is connected to the side of air inlet pipe, have the angle of 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 true CN105170667A (en) | 2015-12-23 |
| CN105170667B CN105170667B (en) | 2017-05-17 |
Family
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 |
|---|---|
| CN (1) | CN105170667B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502881A (en) * | 1993-08-23 | 1996-04-02 | Gaydoul; Juergen | Apparatus for descaling substantially flat surfaces of hot rolled stock |
| 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 |
-
2015
- 2015-08-05 CN CN201510473490.1A patent/CN105170667B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502881A (en) * | 1993-08-23 | 1996-04-02 | Gaydoul; Juergen | Apparatus for descaling substantially flat surfaces of hot rolled stock |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105170667B (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102699028B (en) | Method for eliminating linear edge defects of hot-rolled low-carbon steel | |
| CN102247981B (en) | Structural steel rolling production line and production process thereof | |
| CN102343373B (en) | Method for preventing scale pits of steel plate | |
| CN101618406A (en) | Method for controlling surface chromatic aberration of hot rolling acid-cleaning plate | |
| CN101862760B (en) | High-pressure low-flow descaling process of four-roller reversing steckel mill | |
| CN106513448B (en) | Strip finish rolling descaling method | |
| CN204892573U (en) | Mill coil simply descale spray gun | |
| CN204700062U (en) | Air water spray cooling device on a kind of steel pipe roll road | |
| CN108941213B (en) | Rolling method for controlling structural uniformity of high-strength hot-rolled steel plate | |
| CN105170667A (en) | Scale removal method for hot-rolled narrow strips | |
| CN203018474U (en) | Plate blank descaling treatment device during rough rolling of hot-rolled strip steel | |
| CN202667290U (en) | Horizontal sweeping device for furnace rolling mill | |
| CN105695727A (en) | Plate shape control method for online solution treatment of steel plates | |
| CN202638906U (en) | Surface blowing and sweeping device for hot rolling product | |
| CN204381117U (en) | A kind of device preventing straightening process scale pits | |
| CN205732318U (en) | A kind of high pressure water descaling device produced for high-quality thin specification steel plate | |
| CN104060288A (en) | Novel copper strip automatic adjusting pickling line and adjusting method thereof | |
| CN203470245U (en) | Nozzle with adjustable height | |
| CN109719146B (en) | Efficient descaling method for high-surface-quality medium plate product | |
| CN108405634B (en) | Method for increasing temperature drop in slab process | |
| CN105964710A (en) | High pressure water descaling device and descaling method | |
| CN112676344A (en) | Method for producing medium-thickness steel for engineering machinery by using single-stand steckel mill | |
| CN215918661U (en) | Device for improving side surface cleanliness of heavy and medium plate mill rough descaling system | |
| CN103042055A (en) | Hot-rolled billet steel rough-rolling descaling method | |
| CN203955734U (en) | Medium plate control cooling side spraying system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |