CN103894429B - A kind of de-scaling cell layout method for jet de-scaling and jet descaling method - Google Patents
A kind of de-scaling cell layout method for jet de-scaling and jet descaling method Download PDFInfo
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Abstract
For de-scaling cell layout method and the jet descaling method of jet de-scaling, it comprise arrange successively at least one for remove metal plate and belt upper surface the first mixing jetting de-scaling unit, rinse metal plate and belt upper surface the first low-pressure washing unit, for realize metal plate and belt once inside out the first deflector roll, at least one for remove metal plate and belt lower surface the 2nd mixing jetting de-scaling unit, rinse metal plate and belt lower surface the 2nd low-pressure washing unit, for realizing the 2nd deflector roll of metal plate and belt twice upset. The inventive method can realize that the upper and lower surface to metal plate and belt carries out efficiently, the green de-scaling of continuous print, it is ensured that in de-scaling process, strip remains stable, and amount of jitter is little, and the tension level demand of unit is lower.
Description
Technical field
The invention belongs to cold conditions metal plate and belt process for treating surface, in particular to a kind of de-scaling cell layout method for jet de-scaling and jet descaling method, be mainly used in realizing wide up and down of cold conditions metal plate and belt i.e. full plate face is carried out continuity surface de-scaling, the pros and cons of the metal plate and belt after simultaneously ensureing jet de-scaling meet processing requirement without squama skin and foreign material residual, surfaceness.
Background technology
Metallic substance can form one layer of fine and close coverture being made up of metal oxide in hot rolling or heat treatment process on surface, it is commonly called as " squama skin ", further processing treatment can be impacted by the existence of this squama skin: on the one hand the surface crack of material is not easily found in advance, thus makes the finished product processed there are quality problems; Easily squama skin is pressed into metallic surface on the other hand, causes surface quality problems; In addition, the existence of hard oxide compound, can accelerate the abrasion of roll or cold drawing bench. Therefore the surface of steel plate squama skin removing step before cold-rolling mill is entered, one of tooling that to be called on cold rolling product line indispensable.
The impact being directed to surface squama skin, the processing mode that domestic and international manufacturing enterprise all adopts wet chemical to carry out cleaning carrys out the attachment squama skin of clear board belt surface, and for steel plate, it adopts the strongly acidic solution of sulfuric acid, hydrochloric acid and hydrofluoric acid usually. The production environment of this kind of wet chemical acid cleaning process is very severe, and because producing and a large amount of residual acid that produces must carry out cyclic regeneration process, calculate reclaiming process at present and also certainly lead to corresponding exhaust gas emission, containing a large amount of acidity, corrodibility composition in the waste gas of its discharge, such as HCL, SO2Deng, direct atmosphere pollution.
Based on this, the Heavy environmental pollution problem brought is cleaned for solving chemical process, researcher has carried out big quantifier elimination, have developed multiple technologies and equipment, to substitute the squama skin that this kind of chemical process removes metallic surface, such as the descaling method of electrolysis de-scaling, electrolysis grinding de-scaling, electric discharge de-scaling, electron beam de-scaling, laser de-scaling, grinding de-scaling, throwing ball de-scaling, alternating bending de-scaling and the combination of above-mentioned different methods. These methods are in development process these years, and wherein high-pressure spray technique of scale removal is with fastest developing speed, and its process of industrialization is also obvious all the more.
For the metal plate and belt after ensureing mode of jet de-scaling can enter next step treatment process link smoothly, not affecting again the effect of next step art breading, therefore many research and development units propose a series of solutions targetedly, specific as follows simultaneously:
The heavy Machinery Co., Ltd. of Hunan's nonferrous metals just once utilized mixing jet to remove the surperficial squama skin of alloy bar, and surperficial its of the bar after de-scaling adopts the Purge methods of high-pressure air to carry out surface removing. The major defect of this kind of mode cannot blow to sweep the grains of sand that kind embeds bar surface, causes surface to have hard object particle residue, thus causes bar in next step rolling process, it is easy to produces the surface imperfection because of the press-in of hard object particle. The representative of this kind of technology also has the Liu Tingcheng of University of Science & Technology, Beijing to teach;
Airmatic company of Germany utilizes mixing jet clean metal plane equally, and its post processing mode is: utilize the principle vacuumized, the surface after surface treatment is carried out purifying treatment. But this kind of mode exists above problem equally, not only can not effectively removing the embedding problem of hard object particle, what process is stable not high simultaneously, it is easy to cause some surface not remove clean phenomenon.
By consulting relevant patent, also external especially Japan is found, the metallurgical technology developed countries such as Germany, although it proposes numerous solid jets, mill brush technique of scale removal such as Japan JP06108277A discloses the descaling process adopting spray acid to combinationally use on continuous cold rolling line with brush roller, Japan JP55034688A discloses a kind of associating PV rolling scale breading compound abrasive high-pressure spray de-scaling mode, Japan JP57142710A, JP57068217A, Japan JP59097711A, and the TMW company of Canada disclosed a series of clearance technique US20080108281 (A1) for surface of steel plate squama skin after 2001, US20080182486 (A1) and US20090227184 (A1) etc., West Europe US5388602 in addition, Japanese Patent JP05092231A, JP09085329A and JP2002102915 etc. all do not propose the plate surface technology after a kind of effective process jet de-scaling.
Summary of the invention
It is an object of the invention to provide a kind of de-scaling cell layout method for jet de-scaling and jet descaling method, the upper and lower surface of metal plate and belt is carried out efficiently by energy realization, the green de-scaling of continuous print, guarantee that in de-scaling process, strip remains stable, amount of jitter is little, and the tension level demand of unit is lower.
For achieving the above object, the technical scheme of the present invention is:
For a de-scaling cell layout method for jet de-scaling, it comprise arrange successively at least one for remove metal plate and belt upper surface the first mixing jetting de-scaling unit, rinse metal plate and belt upper surface the first low-pressure washing unit, for realize metal plate and belt once inside out the first deflector roll, at least one for remove metal plate and belt lower surface the 2nd mixing jetting de-scaling unit, rinse metal plate and belt lower surface the 2nd low-pressure washing unit, for realizing the 2nd deflector roll of metal plate and belt twice upset.
Further, be also provided with successively after the 2nd described deflector roll air purge unit, the 3rd, the 4th deflector roll.
Again, after the 2nd described deflector roll, also establish air purge system, this air purge system comprise arrange successively the 3rd deflector roll, air purge unit, the 4th deflector roll.
Having, also arrange the 3rd, the 4th deflector roll after the 2nd deflector roll of the present invention successively, air purge unit is established in the 4th deflector roll outlet.
In addition, the opposite face of each mixing jetting de-scaling unit of the present invention be all furnished with for realize to injection de-scaling during with low-pressure washing during metal plate and belt support multiple supporting roll groups.
The jet descaling method of the present invention, cold conditions metal plate and belt moves to the first mixing jetting de-scaling unit place by roller-way, the high-speed mixing jet flow direct that mixing nozzle in this de-scaling unit ejects plays and hits the upper surface at metal plate and belt, it is achieved the squama skin of metal plate and belt upper surface is removed; Then, metal plate and belt enters the first low-pressure washing unit, utilizing the low jet flow that the low-pressure washing nozzle wherein arranged ejects to realize the remaining slurry of the upper surface to metal plate and belt and foreign material flushing removing, now metal plate and belt has become the metal plate and belt that upper surface squama skin is removed; Then, metal plate and belt realizes strip by the first deflector roll and turns to, the lower surface of the now non-de-scaling of metal plate and belt overturns upward, metal plate and belt directly enters the 2nd mixing jetting de-scaling unit place after turning to, the high-speed mixing jet flow direct that mixing nozzle in de-scaling unit ejects plays and hits the lower surface at metal plate and belt, it is achieved the squama skin of metal plate and belt lower surface is removed; Then, metal plate and belt enters the 2nd low-pressure washing unit, utilizing the low jet flow that the low-pressure washing nozzle wherein arranged ejects to realize the remaining slurry of the lower surface to metal plate and belt and foreign material flushing removing, now metal plate and belt has become the metal plate and belt that upper and lower surface squama skin is removed all completely; Then, realizing metal plate and belt by the 2nd deflector roll and again overturn, its upper and lower surface deployment scenarios is returned to original metal plate and belt state, and continues down process section and run, and the upper and lower surface squama skin so namely completing metal plate and belt is removed and rinsed.
Usually containing two media in the mixing jet of described mixing jetting de-scaling unit, a kind of medium is water, another medium is tiny sand shape hard object particle, the mixing jet of two media is sprayed to certain surface, side of metal plate and belt by nozzle, it is achieved to the removing of strip upper and lower surface squama skin.
Described water is the industrial net circulating water of normal temperature, specifically can be illustrated as in detail: temperature below 100 DEG C, PH value is 6.5��9; Described sand shape hard object granule content is 20 orders lower than the maximum granularity of 5mg/L, sand shape hard object particle.
The sand shape hard object particle of mixing in described nozzle, its concrete explanation in detail can comprise the intermetallic composite coating ball classes such as natural corundum class abrasive material (such as Brown Alundum, white fused alumina, monocrystalline corundum etc.), carbide abrasives (such as black silicon carbide, green silicon carbide, norbide etc.), shot, steel sand, steel wire cut pill.
The useful effect of the present invention:
The present invention adopts same a kind of mixing jetting decoration form just can realize two wide the even de-scaling of squama skin of metal plate and belt, because mixing jet system is completely identical, so its matching is more excellent, spare part quantity can significantly reduce simultaneously;
Adopting jet opposite face to arrange the mode of supporting roll, can significantly improve operation stability and the reliability of metal plate and belt, the tension level needed for it is lower.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention one.
Fig. 2 is the schematic diagram of the embodiment of the present invention two.
Fig. 3 is the schematic diagram of the embodiment of the present invention three.
Fig. 4 is the schematic diagram of the embodiment of the present invention four.
Embodiment
See Fig. 1, a kind of de-scaling cell layout method for jet de-scaling of the present invention, comprise arrange successively at least one for remove metal plate and belt 100 upper surface the first mixing jetting de-scaling unit 1, rinse metal plate and belt 100 upper surface the first low-pressure washing unit 2, for realize metal plate and belt 100 once inside out the first deflector roll 3, at least one for remove metal plate and belt 100 lower surface the 2nd mixing jetting de-scaling unit 4, rinse metal plate and belt 100 lower surface the 2nd low-pressure washing unit 5, for realizing the 2nd deflector roll 6 of metal plate and belt 100 twice upset.
See Fig. 2, it show the embodiment of the present invention two, in the present embodiment, be also provided with successively after the 2nd deflector roll 6 of the present invention air purge unit 7, the 3rd, the 4th deflector roll 8,9.
See Fig. 3, it show the embodiment of the present invention three, in the present embodiment, also establishes air purge system 10 after the 2nd described deflector roll 6, this air purge system comprise arrange successively the 3rd deflector roll 8, air purge unit 7, the 4th deflector roll 9.
See Fig. 4, it show the embodiment of the present invention four, in the present embodiment, after the 2nd described deflector roll 6 also successively the 3rd, the 4th deflector roll the 8,9, the 4th deflector roll 9 outlet establish air purge unit 7.
The opposite face of each described mixing jetting de-scaling unit 1,4 be all furnished with for realize to injection de-scaling during with low-pressure washing during metal plate and belt support multiple supporting roll groups 12,12 '.
See Fig. 1, the jet descaling method of the present invention, (temperature is not higher than the carbon steel strip of 200 DEG C for the metal plate and belt 100 of cold conditions, width is 1000mm, thickness 2.5mm, for Total continuity welded type end to end) move to the first mixing jetting de-scaling unit 1 place by roller-way, mixing nozzle 11 mesohigh water (pressure 50MPa) in this de-scaling unit mixes with the garnet abrasive that mixes entered, the high-speed mixing jet flow direct ejected plays the upper surface hit at metal plate and belt 100, it is achieved the squama skin of metal plate and belt 100 upper surface is removed; Then, metal plate and belt enters the first low-pressure washing unit 2, utilizing the low jet flow (hydraulic pressure 0.5MPa) that the low-pressure washing nozzle 21 wherein arranged ejects to realize the remaining slurry of the upper surface to metal plate and belt 100 and foreign material flushing removing, now metal plate and belt 100 has become the metal plate and belt that upper surface squama skin is removed; Then, metal plate and belt realizes strip by the first deflector roll 3 and turns to, the lower surface of the now non-de-scaling of metal plate and belt overturns upward, metal plate and belt directly enters the 2nd mixing jetting de-scaling unit 4 place after turning to, the high-speed mixing jet flow direct that mixing nozzle 41 in this de-scaling unit ejects plays the lower surface hit at metal plate and belt 100, it is achieved the squama skin of metal plate and belt lower surface is removed; Then, metal plate and belt enters the 2nd low-pressure washing unit 5, utilizing the low jet flow that the low-pressure washing nozzle 51 wherein arranged ejects to realize the remaining slurry of the lower surface to metal plate and belt 100 and foreign material flushing removing, now metal plate and belt 100 has become the metal plate and belt that upper and lower surface squama skin is removed all completely; Then, realize metal plate and belt by the 3rd, the 4th deflector roll 8,9 again to overturn, its upper and lower surface deployment scenarios is returned to original metal plate and belt state, and continues down process section and run, and the upper and lower surface squama skin so namely completing metal plate and belt is removed and rinsed.
In sum, the present invention make full use of high-speed jet and high pressure pure water, pressurized air blow the effect of sweeping, it is achieved that to cold conditions metal sheet face squama skin once completely, continuously, the process of de-scaling efficiently.
Claims (11)
1. the de-scaling cell layout method for jet de-scaling, it is characterized in that, comprise arrange successively at least one for remove metal plate and belt upper surface the first mixing jetting de-scaling unit, rinse metal plate and belt upper surface the first low-pressure washing unit, for realize metal plate and belt once inside out the first deflector roll, at least one for remove metal plate and belt lower surface the 2nd mixing jetting de-scaling unit, rinse metal plate and belt lower surface the 2nd low-pressure washing unit, for realize metal plate and belt second time upset the 2nd deflector roll.
2., as claimed in claim 1 for the de-scaling cell layout method of jet de-scaling, it is characterized in that, be also provided with successively after the 2nd described deflector roll air purge unit, the 3rd, the 4th deflector roll.
3. as claimed in claim 1 for the de-scaling cell layout method of jet de-scaling, it is characterized in that, also establish air purge system after the 2nd described deflector roll, this air purge system comprise arrange successively the 3rd deflector roll, air purge unit, the 4th deflector roll.
4. as claimed in claim 1 for the de-scaling cell layout method of jet de-scaling, it is characterized in that, also arrange the 3rd, the 4th deflector roll after the 2nd described deflector roll successively, air purge unit is established in the 4th deflector roll outlet.
5. as claimed in claim 1 for the de-scaling cell layout method of jet de-scaling, it is characterized in that, the opposite face of each described mixing jetting de-scaling unit be all furnished with for realize to injection de-scaling during with low-pressure washing during metal plate and belt support multiple supporting roll groups.
6. a jet descaling method, its de-scaling unit adopts de-scaling cell layout method described in claim 1, it is characterized in that, cold conditions metal plate and belt moves to the first mixing jetting de-scaling unit place by roller-way, the high-speed mixing jet flow direct that mixing nozzle in this de-scaling unit ejects plays and hits the upper surface at metal plate and belt, it is achieved the squama skin of metal plate and belt upper surface is removed; Then, metal plate and belt enters the first low-pressure washing unit, utilizing the low jet flow that the low-pressure washing nozzle wherein arranged ejects to realize the remaining slurry of the upper surface to metal plate and belt and foreign material flushing removing, now metal plate and belt has become the metal plate and belt that upper surface squama skin is removed; Then, metal plate and belt realizes strip by the first deflector roll and turns to, the lower surface of the now non-de-scaling of metal plate and belt overturns upward, metal plate and belt directly enters the 2nd mixing jetting de-scaling unit place after turning to, the high-speed mixing jet flow direct that mixing nozzle in de-scaling unit ejects plays and hits the lower surface at metal plate and belt, it is achieved the squama skin of metal plate and belt lower surface is removed; Then, metal plate and belt enters the 2nd low-pressure washing unit, utilizing the low jet flow that the low-pressure washing nozzle wherein arranged ejects to realize the remaining slurry of the lower surface to metal plate and belt and foreign material flushing removing, now metal plate and belt has become the metal plate and belt that upper and lower surface squama skin is removed all completely; Then, realizing metal plate and belt by the 2nd deflector roll and again overturn, its upper and lower surface deployment scenarios is returned to original metal plate and belt state, and continues down process section and run, and the upper and lower surface squama skin so namely completing metal plate and belt is removed and rinsed.
7. jet descaling method as claimed in claim 6, is characterized in that, containing two media in the mixing jet of first, second mixing jetting de-scaling unit described, a kind of medium is water, and another medium is tiny sand shape hard object particle.
8. jet descaling method as claimed in claim 7, is characterized in that, described water, and its water quality standard is the industrial net circulating water of normal temperature.
9. jet descaling method as claimed in claim 7, is characterized in that, described water is: temperature below 100 DEG C, PH value is 6.5��9; Described sand shape hard object granule content is 20 orders lower than the maximum granularity of 5mg/L, sand shape hard object particle.
10. jet descaling method as claimed in claim 7, is characterized in that, described sand shape hard object particle is natural corundum class abrasive material, carbide abrasives or intermetallic composite coating ball class.
11. jet descaling methods as claimed in claim 10, is characterized in that, described natural corundum class abrasive material is Brown Alundum, white fused alumina or monocrystalline corundum; Described carbide abrasives is black silicon carbide, green silicon carbide or norbide; Intermetallic composite coating ball class is shot, steel sand or steel wire cut pill.
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| CN201410124036.0A CN103894429B (en) | 2014-03-28 | 2014-03-28 | A kind of de-scaling cell layout method for jet de-scaling and jet descaling method |
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| CN201410124036.0A CN103894429B (en) | 2014-03-28 | 2014-03-28 | A kind of de-scaling cell layout method for jet de-scaling and jet descaling method |
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| CN105880199A (en) * | 2016-04-06 | 2016-08-24 | 北京中冶设备研究设计总院有限公司 | Abrasive-jet double-surface washing device and method for strip steel |
| CN107283324A (en) * | 2017-06-01 | 2017-10-24 | 江苏省冶金设计院有限公司 | A kind of parallel type water abrasive material jetting descaling method |
| CN113857271B (en) * | 2020-06-30 | 2024-04-05 | 宝山钢铁股份有限公司 | Strip steel jet flow descaling process control method, control device and equipment |
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| JPH06280067A (en) * | 1993-03-29 | 1994-10-04 | Nippon Steel Corp | Continuous type vacuum arc descaling device |
| WO2005082555A1 (en) * | 2004-02-27 | 2005-09-09 | Hermetik Hydraulik Ab | Hydraulic device which is used to descale warm rolling products |
| CN102189135A (en) * | 2010-03-16 | 2011-09-21 | 宝山钢铁股份有限公司 | System and method for quickly removing oxidized iron sheet from surface of cold-state strip steel |
| CN202137211U (en) * | 2011-07-07 | 2012-02-08 | 建科机械（天津）股份有限公司 | Movable roller hydraulic dephosphorization device of cold rolled ribbed steel bar production line |
| CN103418624B (en) * | 2012-05-25 | 2016-01-27 | 宝山钢铁股份有限公司 | A kind of cold conditions metal plate and belt solid jet descaling process |
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