CN105081984A

CN105081984A - Surface treatment method for metal plate strip by use of wet centrifugal casting of abrasive

Info

Publication number: CN105081984A
Application number: CN201410209220.5A
Authority: CN
Inventors: 段明南
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2014-05-16
Filing date: 2014-05-16
Publication date: 2015-11-25
Also published as: WO2015172591A1

Abstract

A surface treatment method for a metal plate strip by use of wet centrifugal casting of an abrasive is used for treating the surface of a cold-state metal plate strip not entering a cold-rolling mill, and is characterized in that centrifugal casting throwing heads are arranged above or below or above and below of a metal plate strip, and a certain included angle is formed between the rotating shaft of each throwing head and the width direction (or the moving direction of the metal plate strip) of the metal plate strip. Through the mode, synchronous removal of attachments in typical nonuniform distribution on the metal plate strip in the width direction can be realized; jet flows of all the throwing heads are in typical uniform and symmetrical distribution in the width direction of the metal plate strip; a long completely homogeneous section is arranged in the non-edge part of each jet flow, so that the jet uniformity is greatly improved; invalid jet and a 'surplus-intensity' area are greatly reduced; the surface treatment uniformity and the quality of the cleaned uniform plate face are effectively improved; the system reliability is directly improved and the system cost is directly lowered; and the next process treatment is completely unaffected.

Description

The metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method

Technical field

The invention belongs to cold conditions metal plate and belt (band steel) surface-treated technical field, mainly through the mixing jet impelling mode of one centrifugal impelling head rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) angle in a certain angle, realize carrying out evenly with the mixed at high speed slurry fluid being mixed with abrasive grain to cold conditions metal plate and belt surface, the continuous impact that full plate is wide, grinding, thus realize to wide up and down of cold conditions metal plate and belt-namely full plate face carry out continuously, uniform process of surface treatment, the positive and negative no-sundries simultaneously realizing the metal plate and belt after jet process remains, procedure calls after surface roughness meets.

Background technology

Metal material can form the fine and close covering that one deck is made up of metal oxide in hot rolling or heat treatment process on its surface, be commonly called as " firecoat ", the existence of this firecoat can impact processing process further: on the one hand the surface crack of material is not easily found in advance, thus make the finished product processed there are quality problems; On the other hand, easily firecoat is pressed into metal surface, causes surface quality problems; In addition, the existence of hard oxide, can accelerate the wearing and tearing of roll or drawbench.Therefore must carry out the surface treatment procedures such as de-scaling to entering the surface of steel plate before cold-rolling mill, this is one of technological equipment of indispensability on cold rolling product line.

For the impact of metal plate and belt surface firecoat, in the past, the processing mode that domestic and international manufacturing enterprise all adopts wet chemical to carry out cleaning carried out the attachment firecoat of clear board belt surface.Usually, for steel plate, often adopt the wet chemical acid cleaning process of the strongly acidic solutions such as sulfuric acid, hydrochloric acid and hydrofluoric acid.The production environment very severe of this wet chemical acid cleaning process, and circular regeneration process must be carried out because producing a large amount of residual acid, in addition, current described acid regeneration process also certainly leads to corresponding toxic emission.Containing a large amount of acidity, corrosive elements in the discharging waste gas of the correspondence that described acid regeneration process produces, as HCL, SO2 etc., this directly causes again the pollution to air.

Based on this, clean for solving chemical method the Heavy environmental pollution problem brought, researcher has carried out large quantifier elimination, and has developed multiple technologies method and apparatus, to substitute the firecoat that this chemical method removes metal surface.Described method and apparatus comprises, as the descaling method that electrolysis de-scaling, the de-scaling of electrolysis grinding, electric discharge de-scaling, electron beam de-scaling, laser de-scaling, grinding de-scaling, ball blast de-scaling, alternating bending de-scaling and above-mentioned distinct methods combine.In evolution in recent years, 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 the mode of jet de-scaling of guarantee high-pressure spray de-scaling successfully can enter next step treatment process link, do not affect again the effect of next step PROCESS FOR TREATMENT, many research and development units propose a series of pointed solution simultaneously.Specific as follows:

1) Hunan's nonferrous metals heavy-duty machinery Co., Ltd just once utilized mixing jet method to remove the surperficial firecoat of alloy bar, and according to the method, the Surface of Rod Bar after de-scaling adopts the Purge methods of pressure-air to carry out surface and removes.But the major defect that this method exists to purge the grains of sand of that embedding Surface of Rod Bar, causes surface to have hard object particle residue, thus cause bar in next step rolling process, easily produce because hard object particle is pressed into the blemish formed.

2) German Airmatic company equally also utilizes mixing jet method clean metal plane.Its post processing mode is: utilize the principle vacuumized, and aspirates fast, realize plate face purified treatment to the surface sediment thing after process.But, there is above problem in this mode: namely equally, not only effectively can not remove the imbedding problem of hard object particle, simultaneously higher because aspirating required strip flatness requirements, under the operating modes such as, tension force poor at strip shape is unstable, its treatment effect there will be the defect of poor stability, easily causes some surface cannot remove clean phenomenon.

3) U.S. TMW (TheMaterialWorks) company proposes so a kind of technical scheme (see this application people China publication number United States Patent (USP) that to be the Chinese patent of " CN101516532A " and US publication be " US7601226B2 "): utilize the mode that centrifugal gets rid of---the impelling principle of shot-blasting machine, in its abrasive material, utilize aqueous medium to replace the air of traditional shot-blasting machine, form the binomial mixed slurry of water and abrasive grain, then the centrifugal that slurry injects High Rotation Speed by certain device with certain pressure versus flow is got rid of in head, the high speed centrifugation power effect of being got rid of (impelling) by centrifugal realizes mixed slurry at a high speed, the impact metal plate and belt surface continued, the wet method de-scaling on metal plate and belt surface is realized with this, this technology is also referred to as EPS technology.

But, there is the defects such as plate face percussion intensity lack of homogeneity, jet utilization rate are lower, the de-scaling ability skewness of the wide horizontal roughness value significant difference of plate, plate width direction in above-mentioned EPS technology, due to the existence of these defects, directly limit the board surface quality after de-scaling, de-scaling efficiency and strip de-scaling speed (see Fig. 8-Figure 10).

By consulting Patents, also finding the metallurgical technology developed countries such as external especially Japanese, German, proposing many solid jets, polish-brush technique of scale removal.As Japanese JP06108277A discloses a kind of descaling process adopting spray acid to combinationally use with brush roll on continuous cold rolling line, Japanese JP55034688A discloses a kind of associating PV rolling scale breading-compound abrasive high-pressure spray de-scaling mode.In addition, the patent such as Japanese JP57142710A, JP57068217A, JP59097711A, JP05092231A, JP09085329A, JP2002102915 and U.S. US5388602 is also had.

But as aforementioned, conventional art not yet can provide the technical scheme of the high-pressure spray de-scaling that a kind of like this plate face percussion intensity is even, jet utilization rate is high, the wide roughness across the lay uniformity of plate is good, plate width direction de-scaling ability is evenly distributed.

Particularly, according to conventional art, still be difficult to the wide surface uniform process of full plate being applicable to strip frequent sideslip in running, and the firecoat distribution being difficult to be applicable to based on thickness difference between metal plate and belt width or length direction domain of the existence presents the wide surface uniform process of full plate etc. of the steel grade of typical uneven characteristic.

In addition, conventional art not yet can provide a kind of like this technical scheme of high-pressure spray de-scaling, and described technical scheme can reduce the complexity of casting system, thus the reliability of direct raising system and reduction system cost.

Summary of the invention

For overcoming the problems referred to above, the object of the invention is to, the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method is provided, according to the present invention, the rotating shaft of head (ramming head) is got rid of in throwing and metal plate and belt width (or metal plate and belt traffic direction) is arranged at an angle, the centrifugal impelling medium of the surface treatment method of described wet method centrifugal impelling abrasive is the mixed slurry of abrasive grain and water, thus, the synchronous removing that metal plate and belt presents the attachment of typical uneven distribution on width can be realized, and guarantee that the surface microscopic topographic on plate width direction has strict uniformity.According to the present invention, each throwing is got rid of a jet on plate width direction, is presented typically even, symmetrical feature; And in jet non-edge region, there is the completely evenly section of a section longer, make jet uniformity have great raising.According to the present invention, invalid jet and " intensity is superfluous " region significantly reduce.According to the present invention, surface-treated uniformity and the even board surface quality after removing effectively can be improved.According to the present invention, the complexity of casting system can be reduced, thus the reliability of direct raising system and reduction system cost.According to the present invention, guarantee the PROCESS FOR TREATMENT effect not affecting next step after it enters next step processing section completely.

Object of the present invention is again, provides the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method.According to the present invention, a rotating shaft is got rid of in throwing and metal plate and belt width be arranged in parallel, namely vertically with metal plate and belt traffic direction to arrange, the centrifugal impelling medium of the surface treatment method of described wet method centrifugal impelling abrasive is the mixed slurry of abrasive grain and water, can realize the synchronous removing that metal plate and belt presents the attachment of typical uneven distribution on width in this way; Each throwing is got rid of a jet on plate width direction, is all presented typically even, symmetrical feature, and in jet non-edge region, has the completely evenly section of a section longer, make jet uniformity have very big raising; Invalid jet and " intensity is superfluous " region significantly reduce; Effectively can improve surface-treated uniformity and the even board surface quality after removing; Reduce the complexity of casting system, thus the reliability of direct raising system and reduction system cost; Guarantee the PROCESS FOR TREATMENT effect not affecting next step after it enters next step processing section completely.

Get rid of the surface treatment method of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle according to throwing of the present invention, can be implemented in the scale removal effect with uniformity more on strip length direction on plate width direction.

According to the present invention, described scale removal effect specifically can be illustrated as: fluctuation range uniformity on whole strip length direction, on plate width direction of firecoat residual rate, surface roughness value; Avoid because jet is uneven, cause strip head, afterbody to remove endless because firecoat is thicker, it is excessive to remove because firecoat is thinner in the non-section end to end of band steel; Simultaneously on strip width direction, because edge region, both sides firecoat is thicker, firecoat is removed endless, the middle part of plate width because of firecoat thinner, and remove excessive.

The surface treatment method of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle is got rid of according to throwing of the present invention, length direction and width firecoat can be specially adapted to distribute the uneven metal plate and belt of typical case, as adopted the metal plate and belt material of high temperature coiling technique after hot rolling.The firecoat of the section end to end one-tenth-value thickness 1/10 of this kind of metal plate and belt is obviously higher than zone line, simultaneously obviously higher than territory, width midway at the both sides edge firecoat thickness in strip width direction.

The surface treatment method of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle is got rid of according to throwing of the present invention, it is large that first watch is got rid of in the TMW-EPS throwing that the centrifugal adopted gets rid of its impeller width value ratio of head, be 150 ~ 200mm, what namely the present invention adopted is that a kind of wide blade centrifugal gets rid of head, thus, the wide impeller realizing High Rotation Speed by medium supply is thrown and is thrown away wide abrasive jet.

The surface treatment method of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle is got rid of according to throwing of the present invention, the centrifugal impelling medium of the surface treatment method of described wet method centrifugal impelling abrasive is the mixture of abrasive grain and water, described abrasive grain is that natural corundum class abrasive material is (as Brown Alundum, white fused alumina, single alundum etc.), carbide abrasives is (as black silicon carbide, green silicon carbide, boron carbide etc.) etc., or artificial class abrasive material, as shot, steel sand, the intermetallic composite coating ball classes such as steel wire cut pill, described abrasive material comprises the corundum class abrasive material of various sharp-pointed or non-pointed form, carbide abrasives or artificial class abrasive material etc.

Object of the present invention is again: provide a kind of and throw the surface treatment method getting rid of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle, in jet intensity distribution curve after the surface treatment method superposition of the centrifugal impelling abrasive of described wet method, single throwing get rid of jet intensity distribution local peaking that capitiform becomes and the strength difference that formed between uniform flat line that effective jet intensity distributes less, inactive area scope outside plate width scope is less, " intensity is superfluous " region also significantly reduces simultaneously, thus, system power consumption and mechanical loss can be effectively saved, directly enhance system energy efficiency and reduce system cost.

The surface treatment method getting rid of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle is thrown according to one of the present invention, it is large that the surface treatment method of described wet method centrifugal impelling abrasive is specially adapted to strip specifications vary scope, length direction and width are easily affected by environment and cause firecoat responsive type steel grade pockety, are particularly useful for that the overall length of carbon sheet, full plate are wide, the synchronous de-scaling process of positive and negative.

The surface treatment method getting rid of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle is thrown according to one of the present invention, the surface treatment method of the centrifugal impelling abrasive of described wet method is specially adapted to the overall length of strip of steel plate, full plate is wide, the synchronous de-scaling process of positive and negative, the thickness difference that described scale presents both sides and zone line on metal plate and belt width distributes at the firecoat of more than 5um and presents the steel grade of typical uneven characteristic, to distribute at the firecoat of more than 7um at the head-tail of metal plate and belt length direction and the thickness difference of zone line and present the steel grade of typical uneven characteristic, be applicable to simultaneously the deformed steel strip of metal plate and belt or tension fluctuation cause band steel during impelling de-scaling plate face jitter distance more than 20mm, but be no more than the extreme operating condition of 100mm.

Preferably, the thickness difference that described scale presents both sides and zone line on metal plate and belt width distributes at the firecoat of more than 3um and presents the steel grade of typical uneven characteristic, and distributing at the firecoat of more than 5um at the head-tail of metal plate and belt length direction and the thickness difference of zone line presents the steel grade of typical uneven characteristic.

Throw according to one of the present invention the surface treatment method getting rid of the centrifugal impelling abrasive of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle, the surface treatment method of described wet method centrifugal impelling abrasive is specially adapted to the wide surface treatment of full plate of strip frequent sideslip in running.

The object of the invention is also: provide a kind of described throwing to get rid of the surface processing device of the wide abrasive of the centrifugal impelling of wet method that a rotating shaft and metal plate and belt width (or metal plate and belt traffic direction) are arranged at an angle.

The technical scheme of the metal plate and belt surface treatment method of wet method of the present invention centrifugal impelling abrasive is as follows:

A metal plate and belt surface treatment method for the centrifugal impelling abrasive of wet method, is provided with processing unit, and described processing unit comprises centrifugal impelling throwing and gets rid of head, for carrying out surface treatment to entering the cold conditions metal plate and belt surface before cold-rolling mill, it is characterized in that,

On or below described metal plate and belt, or upper and lower arranges centrifugal impelling throwing and gets rid of head;

Described centrifugal impelling gets rid of the feed pipe of head by connecting on it with throwing, jet 4 is formed with the mixed at high speed fluid slurry being mixed with abrasive grain, cold conditions metal plate and belt surface is carried out evenly, continuous impact that full plate is wide, grinding, thus realize to cold conditions metal plate and belt wide up and down-namely full plate face carry out continuously, surface treatment uniformly;

A rotating shaft is got rid of in described throwing and metal plate and belt width is that 0 ~ 45 ° of angle is arranged.

Preferably, a rotating shaft is got rid of in described throwing and metal plate and belt width be arranged in parallel, namely vertically with metal plate and belt traffic direction arranges.

That is, the speed of service v1 direction central axis upright of central axis 8 and metal plate and belt 5, be parallel to the plate face of metal plate and belt 5, then the direction of this central axis 8 is the plate width direction of metal plate and belt 5, is also referred to as width simultaneously.

Preferably, described throwing gets rid of a rotating shaft and metal plate and belt width angle is 35 ~ 45 °.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, centrifugal gets rid of on a 2a and is provided with multi-disc centrifuge blade 1a, centrifugal gets rid of a 2a under the effect of external drive source, drives the multi-disc centrifuge blade 1a in the portion that is fixed thereon to rotate with same angular speed w1 together

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, centrifugal impelling throwing is set in the paired correspondence of described metal plate and belt upper and lower and gets rid of head;

Described centrifugal gets rid of on a 2a and is provided with 4 ~ 20 centrifuge blade 1a, and centrifugal gets rid of a 2a under the effect of external drive source, drives the centrifuge blade 1a be fixed thereon to rotate with same angular speed w1 together,

Centrifuge blade 1a exradius is greater than the maximum outside diameter of feed pipe 3a, after slurry transferring to feed pipe 3a inside, flows on the centrifuge blade 1a of High Rotation Speed, and process is got rid of in the throwing that the entirety realizing slurry 4 is accelerated.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described centrifugal gets rid of on a 2a and is provided with 4 ~ 8 centrifuge blade 1a.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, preferably, it is 150 ~ 200mm that centrifugal gets rid of its impeller width value of head, and thus, the wide impeller throwing being realized High Rotation Speed by medium supply throws away wide abrasive jet.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, preferably, described feed pipe 3a is communicated with, is arranged at centrifugal and gets rid of a 2a axle portion.

Because blade 1a exradius is obviously greater than the maximum outside diameter of feed pipe 3a, be mixed with solid abrasive particle and liquid (can be the liquid such as oil, water, especially water), mixture-the slurry 4 of this two media, force to input in feed pipe 3a by transfer pipeline under the state of certain pressure and flow velocity, realize the conveying feed of slurry 4.After being delivered to feed pipe 3a inside, centrifugal gets rid of a 2a and under the effect of external drive source, produces a fixed angular speed w1 rotate, and drive the multi-disc centrifuge blade 1a in the portion that is fixed thereon to rotate with same angular speed together, its angular velocity of rotation value equals w1 equally simultaneously.

Under this differences in angle w1 effect, the slurry medium 4 of feed pipe 3a inside produces certain centrifugal force automatically, impel it according to predetermined channel flow on the blade 1a of High Rotation Speed, and blade 1a is because the maximum outside diameter of the feed pipe 3a of its exradius ratio is obviously larger, therefore it is under same constant angular velocity w1 effect, linear speed enlarges markedly, and so namely achieves the acceleration to slurry 4; Simultaneously under centrifugal action, slurry 4 departs from the surface of blade 1a under the acceleration of centrifuge blade 1a, and outwards flies out along the tangential direction of blade 1a cylindrical, and so far, the entirety namely achieving slurry 4 is accelerated, process is got rid of in throwing.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described feed pipe 3a, throw the rotary motion of getting rid of a 2a and blade 1a and all get rid of a rotation around same throwing, i.e. central axis 8, with same angular speed High Rotation Speed.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that,

The absolute value of described angular velocity of rotation w2 and w1 is equal, but direction of rotation is contrary.

The absolute value of described angular velocity of rotation w2 and w1 is equal, and its objective is that the linear velocity, jet distribution etc. of guaranteeing slurry punch panel face are all completely the same, its final goal is also guarantee that the de-scaling quality of steel plate positive and negative is just the same.

Preferably, it is that a 2b is got rid of in the throwing of same model that a 2b is got rid of in the throwing that described metal plate and belt upper and lower is arranged, in producing in actual de-scaling, positive and negative needs equal surface quality, therefore needs the ramming head of same model to get rid of to realize medium throwing, simultaneously, the ramming head equipment of same model is convenient to follow-up equipment control and is mutually changed, realize lower Parts Inventory management and rapid rush-repair, equally, the feed pipe 3b and blade 1b that a 2b are provided with same model are got rid of in the throwing of same model.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described throwing get rid of 2, feed pipe 3 magnitude setting 2 ~ 16, and its magnitude setting is identical, forms a processing unit.

" processing unit " mentioned here refers to a standardized module, is convenient to the copy of follow-up large production equipment, series connection.Because the de-scaling of individual unit is limited in one's ability, de-scaling speed can not be too high, during actual production, for meeting the capacity requirements of upstream and downstream, possible speed will exceed the de-scaling ability of individual unit, at this time just needs multiple processing unit to connect, to improve speed and production capacity.

Described jet 4, metal plate and belt 5 width has typical two ends jet intensity, and progressively attenuation region P1 and middle jet intensity present the intensity distribution rule of uniform flat region P2;

Described middle jet intensity region P2 is metal plate and belt 5 surface-treated effective stream processing region.

Progressively attenuation region P1 scale removal effect is poor for described two ends jet intensity, needs some other jets and supplements it, and supplementing by other jet, can realize the equal scale removal effect being similar to middle jet intensity region.

The ratio of width on whole jet distributed areas width (P1 × 2+P2) of attenuation region P1 × 2 is got rid of in described single throwing, that is, the jet intensity proportion of goods damageds are 10 ~ 60%.

Preferably, the ratio of width on whole jet distributed areas width (P1 × 2+P2) of attenuation region P1 × 2 is got rid of in described single throwing, that is, the jet intensity proportion of goods damageds are 10 ~ 30%.

The described throwing vertical range value of getting rid of between the central axis 8 of the centrifugal rotation in scheme wide nearest apart from metal plate and belt 5 be greater than this throwing to get rid of on head blade distalmost end be installed rotate the exradius value produced.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, each throwing is got rid of 2a, 2b, 2c, 2d on the width of metal plate and belt 5, is realized dislocation arrangement, its requirement that specifically misplaces is: the jet intensity that head is got rid of in each throwing has one to map distribution curve at plate width direction, the regularity of distribution that this curve presents " two ends decay-neutral straight ", and the width value of its flat segments P2+P1 is the magnitude of misalignment on width between every two ramming heads.

As shown in Fig. 3 and Fig. 5 A, its P1 is attenuation region, and both sides have, and P2 is flat region.Its concrete magnitude of misalignment is directly related with this curve, usually when guaranteeing the object of jet efficiency and even de-scaling, the magnitude of misalignment of two ramming heads is generally " in the mapping curve of plate width direction, the width value of its flat segments P2+P1 is the magnitude of misalignment on width between every two ramming heads to the abrasive jet intensity of single ramming head impelling ".

Namely, on plate width direction, get rid of P1 value in the abrasive strength distribution curve of head and P2 value according to each throwing, two throwings distance of getting rid of between head adjacent on plate width direction is P1+P2.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described slurry 4 is water for industrial use or the oily lipid medium possessing mobility.

Preferably, when described liquid medium is general industry water, temperature below 100 DEG C, pH value is 6.5 ~ 9.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, when described liquid medium is oily lipid medium, for having the mixes liquid material that the liquid of mobility or certain several liquid medium or dissolution of solid are formed after liquid medium.

As added the antirust reagent of oiliness in the water body of slurry, the mixture of a kind of grease class that Here it is, water mixes the mixing material forming emulsification shape afterwards with it, its objective is that the plate face after guaranteeing de-scaling can be antirust in time, stops macula lutea and occurs.

Described solid dielectric particle diameter is 0.1mm ~ 2.0mm, described solid dielectric shape preferably spherical or cylindrical particle;

The particle of the preferred 0.2mm ~ 0.5mm of described solid dielectric particle diameter;

The solid dielectric particle diameter of described slurry is the particle of 0.1mm ~ 2.0mm, preferred 0.2mm ~ 0.5mm, and described solid dielectric shape is spherical, column, multi-angular shape particle preferably, or the mixture of more than two kinds.

Preferably, described solid dielectric shape preferably the mixture of spherical, column, multi-angular shape particle more than two kinds time, wherein two or three mixing according to a certain percentage of three kinds of difformity particles, such as, the proportioning of shot and steel sand is at 1:1 ~ 1:5 proportion.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described solid dielectric can illustrate as natural corundum class abrasive material (as Brown Alundum, white fused alumina, single alundum etc.), carbide abrasives (as black silicon carbide, green silicon carbide, boron carbide etc.) etc., or artificial class abrasive material, as intermetallic composite coating ball classes such as shot, steel sand, steel wire cut pills, preferred shot and steel wire cut pill.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described metal plate and belt is the steel grade that a firecoat distribution presents typical uneven characteristic, namely, scale presents the thickness difference of both sides and zone line at 5um ~ 10um on metal plate and belt width, or, scale at the head-tail of metal plate and belt length direction and the thickness difference of zone line at 7um ~ 15um.

According to the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described method is applicable to metal plate and belt deformed steel strip, or cause strip strip plate face jitter distance during impelling de-scaling because of tension fluctuation, namely " unrestrained high level " is more than 20mm, but is no more than the operating mode of 100mm.

Steel plate as cooled in hot rolling, but without flattening process process, its original shape wave in plate face, camber etc. are very serious, wave height can reach more than 20mm usually, affect the distance between jet and plate face and cause the actual jet density that receives in this region and design load inconsistent, thus after easily causing de-scaling, board surface quality is inconsistent.

Because tension fluctuation causes strip strip plate face jitter distance during impelling de-scaling, namely it is perpendicular to the height value in plate face, " wave is high " is exactly lain in a horizontal plane in by steel plate on one block of massive plate, steel plate is because " shape wave ", cause regional area protruding, Here it is " wave is high ", and an important indicator of protruding value is exactly " unrestrained high level ".

Preferably, described metal plate and belt is the steel grade that a firecoat distribution presents typical uneven characteristic, namely, scale presents the thickness difference of both sides and zone line at 3um ~ 10um on metal plate and belt width, or, scale at the head-tail of metal plate and belt length direction and the thickness difference of zone line at 5um ~ 15um.

The technical scheme of the metal plate and belt surface processing device of a kind of wet method of the present invention centrifugal impelling abrasive is as follows:

The metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method, be provided with processing unit, described processing unit comprises centrifugal impelling throwing and gets rid of head, for carrying out surface treatment to entering the cold conditions metal plate and belt surface before cold-rolling mill, it is characterized in that, described processing unit comprises:

The ramming head quantity that unit is arranged generally with 4,8 or 16 for benchmark.

The ramming head quantity normally even number that unit is arranged, because the quantity on the upper and lower surface of steel plate is equal, therefore sum normally even number, at the upper surface of steel plate as arranged 4, that lower surface must be also 4, its objective is and guarantees that scale removal effect is consistent.

According to the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that,

Centrifugal impelling throwing is set in the paired correspondence of described metal plate and belt upper and lower and gets rid of head;

According to the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method of the present invention, it is characterized in that, described centrifugal gets rid of on a 2a and is provided with 4 ~ 8 centrifuge blade 1a.

Preferably, described centrifuge blade 1a has angle to be arranged at centrifugal to get rid of a 2a surface, and the described angle that arranges is 35-45 °.

Described feed pipe 3a, throw the rotary motion of getting rid of a 2a and blade 1a and all get rid of a rotating shaft around same throwing, i.e. central axis 8, with same angular speed High Rotation Speed.

Described angular speed is generally 1500 turns/min ~ 2200 turn/min.

According to the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method of the present invention,

Described metal plate and belt 5 runs with linear velocity v1 along its length, and now centrifugal gets rid of the plate width direction angle 35 ~ 45 ° of 2 and the central axis 8 that rotates of blade 1 above and metal plate and belt 5.

Preferably, the speed of service v1 direction central axis upright of central axis 8 and metal plate and belt 5, be parallel to the plate face of metal plate and belt 5, then the direction of this axis 8 is the plate width direction of metal plate and belt 5, is also referred to as width simultaneously.

Preferably, it is that head is got rid of in the throwing of same model that head is got rid of in the throwing that described metal plate and belt upper and lower is arranged, in producing in actual de-scaling, positive and negative needs equal surface quality, therefore needs the ramming head of same model to get rid of to realize medium throwing, simultaneously, the ramming head equipment of same model is convenient to follow-up equipment control and is mutually changed, and realizes lower Parts Inventory management and rapid rush-repair, equally, such as, the feed pipe 3b and blade 1b that a 2b are provided with same model are got rid of in the throwing of same model.

The mixing jet 4 that scheme produces is got rid of in described throwing, and metal plate and belt 5 width has the intensity distribution rule (see Fig. 3 and Fig. 5) that typical two ends jet intensity P1 progressively decays, middle jet intensity P2 presents uniform flat;

Described middle jet intensity region P2 is metal plate and belt 5 surface-treated effective stream processing region;

The described throwing vertical range value of getting rid of between centrifugal rotation axis 8 in scheme wide nearest apart from metal plate and belt 5 to be greater than on this centrifugal wheel impeller 1 distalmost end be installed rotate the exradius value produced.

Described multiple throwing is got rid of 2a, 2b, 2c, 2d on the width of metal plate and belt 5, is realized dislocation arrangement.

The particle of the preferred 0.2mm ~ 0.5mm of described solid dielectric particle diameter.

Described solid dielectric can illustrate as natural corundum class abrasive material (as Brown Alundum, white fused alumina, single alundum etc.), carbide abrasives (as black silicon carbide, green silicon carbide, boron carbide etc.) etc., or artificial class abrasive material, as intermetallic composite coating ball classes such as shot, steel sand, steel wire cut pills, preferred shot and steel wire cut pill.

The present invention and conventional art (such as EPS) have following typical differences:

An intensity distribution is got rid of in throwing: EPS adopts the impelling scheme of traditional shot-blasting machine, and the actual curve of the intensity distribution of impelling jet density on plate width direction of traditional shot-blasting machine is as shown in figure below (see Figure 11), the jet that this distribution characteristics causes single throwing to get rid of head is distributed in cannot be completely even on plate width direction.Therefore, for guaranteeing that the jet of jet on plate width direction is even as far as possible, shot-blasting machine producer adopts two throwings to get rid of the scheme that capitiform becomes a unit usually, and namely two throwings are got rid of head and adopted the scheme mutually reversely rotated, carry out intensity to make up mutually, thus form a kind of distribution mode close to homogenising.

Based on this, the TMW company jet that each throwing of EPS got rid of to 10a, 10b realizes its jet intensity distribution on plate width direction by this mode mutually made up and has the feature shown in Fig. 9 A, namely throw and get rid of the contrary of 10a, 10b direction of rotation, its distribution character presents typically asymmetric, Non-Gaussian Distribution feature.

In the present invention, there is multiple throwing and get rid of head, such as, the occasion of 2a, 2b, 2c, 2d is got rid of in four throwings, the jet intensity distribution of jet on plate width direction that 2a, 2b, 2c, 2d are got rid of in each throwing has the feature shown in Fig. 3 or Fig. 5 A, namely the respective jet that 2a, 2b, 2c, 2d are got rid of in each throwing all presents typically even, symmetrical feature on plate width direction, and in jet non-edge region, there is the completely evenly section of a section longer, relative to EPS impelling mode disclosed in TMW, jet uniformity disclosed by the invention has very big raising.

There is significant difference in the distributing homogeneity after the intensity superposition of head is got rid of in multiple throwing:

An Overlapping intensities distribution is got rid of in throwing: according to patent formula disclosed in TMW, wide of metal plate and belt side is upper to be adopted and twoly throws when to get rid of, two throwing is got rid of head and is adopted the impelling mode mutually reversely rotated, the Overlay of its jet intensity as shown in Figure 9 B, still there is typical inhomogeneities in the distribution of overall strength on metal plate and belt 5 width after its superposition, in whole distribution curve, there is the feature at " low, the middle end, two ends, near side (ns) region high ", it is uneven that intensity distribution uneven directly brings strip 5 plate face treatment effect.Also can directly embody shown in (see Figure 12 A, Figure 12 B) at the board surface quality of jet intensity zones of different, the plate face pit shape that jet intensity is suitable is comparatively straight, even, and " lamination " phenomenon is little; The excessive plate face pit shape of jet intensity is uneven, and " lamination " phenomenon is very general, directly weakens the quality level on surface.

The present invention is by rotation and plate width direction 0 ~ 45 °, particularly the impelling mode of completely parallel (i.e. rotation and plate width direction 0 °) (is illustrated: batch steel for typical hot-rolled high, its both sides edge firecoat is usually at 15um thickness, and it is very fine and close, based on Fe3O4, jet density needed for removing is higher, and the firecoat thickness in the middle part of strip width is generally 10um level, and comparatively sparse), throwing so can be set and get rid of a rotating shaft and metal plate and belt width 0 ~ 45 °, or completely parallel mode carries out de-scaling process, the rotary speed of head is got rid of by the abrasive amount of feeding or throwing rationally increasing responsible both sides steel edge portion impelling head, namely the synchronous removing of both sides firecoat and firecoat in the middle part of strip width is achieved, and avoid the drawback of the excessive process of jet.

According to the present invention, easily can realize more uniform jet intensity distribution, get rid of in a scheme according to the many throwings shown in Fig. 4 of the present invention, a 2a is got rid of in upper employing four throwings in wide of metal plate and belt side, 2b, 2c, during 2d, a 2a is got rid of in four throwings, 2b, 2c, 2d is on the width of metal plate and belt 5, the throwing of arranging before and after being realized by mechanical device gets rid of head in the enterprising line misregistration arrangement of the plate width direction of centrifuge blade, arrange before and after realizing by misplacing that throw the one fixed width jet getting rid of head generation realizes mutually supplementing of effective de-scaling width on plate width direction, so can guarantee, on plate width direction, there is typical uniformity.

The Overlay of its jet intensity as shown in Figure 5 B, the distribution of overall strength on metal plate and belt 5 width after its superposition has significant uniform characteristics, in whole distribution curve, exist " two ends are significantly lowered, middle overall even, local there is projection " feature, it is even that uniform intensity Distribution is directly brought strip 5 plate face treatment effect, and the plate face microscopic appearance after its process is based on Figure 12 A.

Higher process efficiency, lower processing cost:

According to the present invention, based on the jet uniform characteristics on plate width direction, thus promote, reduce in invalid jet area there is special convenience realizing strip speed, relative to conventional centrifugal shot-blasting machine to strip de-scaling mode, the present invention is because uniformity uniformity is good, and the processing speed that can realize under Same Efficieney loss promotes, and can effectively reduce at the invalid jet of strip edge simultaneously, so significantly can promote the effective rate of utilization of jet, reduce energy consumption of electrical machinery.

Disclosed in TMW-EPS, jet distribution is shown in Figure 10, based on the surface treatment minimum requirements principle of strip 5, the peak value that the upper existence three of jet intensity distribution curve (shown in Fig. 9 B) after superposition is different, be respectively edge peak value, central peak and near side (ns) peak value, typical strength difference is all there is between three peak values, its difference is respectively △ P2 and △ P3, for the surface treatment quality realizing strip 5 meets technological requirement, must using the intensity distribution minimum peak in strip 5 width orientation as the benchmark of strip 5 speed of service, namely at minimum peak place, the maximum speed that strip 5 can be run is as the final stable process speed processed.

In the present invention, there is multiple throwing and get rid of head, such as, the occasion of 2a, 2b, 2c, 2d is got rid of in four throwings, jet dissipation rate disclosed by the invention is explained by Fig. 3 and Fig. 6, the jet intensity distribution after 2a, 2b, 2c, 2d superposition is got rid of based on throwing disclosed by the invention, in jet intensity distribution curve after its superposition (see Fig. 6), strength difference between local peaking and uniform flat line is less, for △ P1, now strip 5 speed of service must set process speed with the intensity of uniform flat line.

As known from the above, on the basis that equal work consumes, scheme disclosed by the invention can obtain higher surface treatment speed.

(1) jet utilization rate disclosed by the invention is higher:

Disclosed in TMW-EPS, jet distribution is shown in Figure 10, based on the surface treatment minimum requirements principle of strip 5, the peak value that the upper existence three of jet intensity distribution curve (shown in Fig. 9 B) after superposition is different, be respectively edge peak value, central peak and near side (ns) peak value, typical strength difference is all there is between three peak values, its difference is respectively △ P2 and △ P3, for the surface treatment quality realizing strip 5 meets technological requirement, must using the intensity distribution minimum peak in strip 5 width orientation as the benchmark of strip 5 speed of service, namely at minimum peak place, the maximum speed that strip 5 can be run is as the final stable process speed processed, and the jet outside edge peak value, 13a and 13c region as shown in Figure 9 B, be invalid jet, and the same loss system power consumption of this invalid jet and mechanical loss, this invalid jet area 13a+13b takies the ratio of whole jet area 13a+13b+13c, for the jet intensity proportion of goods damageds, meanwhile, state that higher than the jet area at minimum peak place on plate width direction, surface is in " intensity is superfluous ", this equally directly causes " jet dissipation ".And when actual production, the plate of the compatible various different in width specification of the necessary energy of single unit, then the double end of TMW-EPS throws scheme of getting rid of when carrying out extremely wide specification and producing, and the jet dissipation amount that its jet intensity is uneven embodied worsens further, specifically see shown in Figure 10 B.

As known from the above, the jet dissipation rate in EPS technology disclosed in TMW is higher.

In the present invention, there is multiple throwing and get rid of head, such as, a 2a is got rid of in four throwings, 2b, 2c, the occasion of 2d, jet dissipation rate disclosed by the invention is explained by Fig. 3 and Fig. 6, a 2a is got rid of based on throwing disclosed by the invention, 2b, 2c, jet intensity distribution after 2d superposition, in jet intensity distribution curve after its superposition (see Fig. 6), strength difference between local peaking and uniform flat line is less, for △ P1, now strip 5 speed of service must set process speed with the intensity of uniform flat line, and the inactive area 12a now outside strip 5 width range, 12c scope is less, the ratio (i.e. the jet intensity proportion of goods damageds) accounting for total jet intensity region 12a+12b+12c significantly reduces than EPS technology, " intensity is superfluous " region also significantly reduces simultaneously, based on this, the present invention program can effectively save system power consumption and mechanical loss, directly enhance system energy efficiency, if the power reduction of related accessory system, the TMW-EPS technique of descaling process Energy Efficiency Ratio disclosed by the invention promotes more than 10%.Thus, under the prerequisite keeping uniform quality, stability more excellent, the lifting of efficiency directly reduces the processing cost of unit product.

(2) its mounting means by peener of EPS product of U.S. TMW company determines: the plate surface roughness value after de-scaling presents typically the defect of " both sides are large; middle low " in the distribution of plate width direction, by measuring, Ra value (the crucial measurement index of roughness with steel areas at both sides, being measured as Ra1Max herein) the Ra value (measured value is Ra1min) in the territory, width midway of ratio exceeds more than 1um, very large on the use impact of user, the especially impact of lumber recovery and quality stability.

Shown in Figure 14 A:

ΔR _a-1＝Ra1 _Max-Ra1 _Min

R _a1for the mean value of roughness value on plate width direction;

Then:

\frac{Δ R_{a - 1}}{R_{a 1}} &GreaterEqual; 20 %

The uneven index of this roughness is the key affecting user's lumber recovery.

Cause the main cause of the special regularity of distribution of this roughness (see Figure 14 A) to be: throw the rotating shaft getting rid of head vertical with plate width direction time, jet plate width direction the regularity of distribution as shown in FIG. 13A, now, the jet that head is got rid of in single throwing is stronger in blow speed (i.e. the flying speed value of the abrasive material) uniformity of plate width direction, but the abrasive material flight angle of plate width direction zones of different is widely different, as shown in FIG. 13A, the strike angle " near normal " of jet in plate wide width portion region that impelling head 10A produces, it is the darkest that its abrasive material with uniform velocity hits " pit " degree of depth produced, and at plate width direction apart from this impelling head 10A region farthest, " pit " degree of depth of hitting with the abrasive material of uniform velocity wants much shallow, because its heading is approximately parallel to steel plain, this more shallow " pit " is relative to the darkest " pit ", when user uses, be usually difficult to the technological requirement of " plate surface roughness is at the necessary strict conformance of width " reached needed for user.

The roughness distribution of the open scheme of the present invention: rotating shaft and the plate width direction of impelling head 2a disclosed by the invention are certain angle, and the minimum of a value of this angle is " 0 ", i.e. the rotating shaft of impelling head 2a completely parallel with plate width direction (see Figure 13 B).Now, the centrifuge blade that single impelling head disclosed by the invention relies on it wider creates a kind of special jet regularity of distribution---and " neutral straight-both sides decay " (see Fig. 5), and although this jet creates the abrasive material of the equal flying speed of multiple different angles, although the flight angle difference of these abrasive materials is larger, but be all distribute along strip length direction (i.e. plate length direction), and on plate width direction, the jet quantitative value that each region is born, flying speed and angle (belong to the comprehensive function result of multiple different angles, the i.e. compound action of " pit " and " dark pit ") etc. be all consistent (see Figure 13 B and 14B).This also just directly ensure that steel plate " pit " distribution on plate width direction has good uniformity, so namely ensure that: the uniformity of the roughness value Ra on plate width direction:

Shown in Figure 14 B:

ΔR _a-2＝Ra2 _Max-Ra2 _Min

R _a2for the mean value of roughness value on plate width direction;

Then:

\frac{Δ R_{a - 2}}{R_{a 2}} \leq 10 %

The uneven index of this roughness is well positioned to meet the technological requirement of user to plate surface roughness, therefore ensure that the lumber recovery of user, thus directly ensure that the control of cost.

Accompanying drawing explanation

Fig. 1 is the side view that the arrangement of head is got rid of in single throwing disclosed by the invention;

Fig. 2 is the top view that the arrangement of head is got rid of in single throwing disclosed by the invention;

Fig. 3 A, Fig. 3 B is respectively the jet intensity distribution schematic diagram that head is got rid of in single throwing disclosed by the invention;

Fig. 4 is the top view that the arrangement of head is got rid of in many throwings disclosed by the invention;

Fig. 5 A is the intensity distribution schematic diagram that head is got rid of in the single throwing of the present invention;

Fig. 5 B is the present invention's four throwings intensity distribution of getting rid of head and superpose schematic diagram;

Fig. 6 is that after the superposition of head is got rid of in four throwings disclosed by the invention, in intensity, active strength and decay intensity split schematic diagram;

Fig. 7 A, Fig. 7 B and Fig. 7 C are respectively after the present invention's four throwings get rid of head superposition, for the distribution schematic diagram of different de-scaling operating modes of the uneven surface of steel plate of firecoat thickness distribution typical case;

Fig. 7 A-even for clear board cross direction firecoat, but all thinner strip;

Fig. 7 B-thick for the two ends firecoat that clear board is wide, the region that plate wide zone line firecoat is thin;

Fig. 7 C-for removing the section end to end of strip: namely firecoat is comparatively even, but all very thick region;

Fig. 8 A, Fig. 8 B is respectively top view and the side view of typical shot-blasting machine impelling process;

Fig. 9 A is the intensity distribution schematic diagram that head is got rid of in typical single throwing;

Fig. 9 B be jet intensity after the impelling of typical double end shot-blasting machine with superpose after intensity distribution;

Figure 10 A, B show the segmentation schematic diagram of active strength and decay intensity in the distribution of the jet intensity after the impelling of described typical double end shot-blasting machine on different size metal plate and belt width;

Figure 10 A is the jet intensity distribution map to one fixed width strip after the impelling of typical double end shot-blasting machine;

Figure 10 B is the jet intensity distribution map to more wide plate band after the impelling of typical double end shot-blasting machine;

Figure 11 be DISA disclosed-the strength distribution curve figure of shot-blasting machine pill on plate is wide;

Figure 12 A is the surface microscopic topographic figure that jet intensity is suitable;

Figure 12 B is the excessive surface microscopic topographic figure of jet intensity;

When Figure 13 A is TMW-EPS impelling on plate width direction different angles flight abrasive material distribution map;

Figure 13 B is the distribution map of the different angles flight abrasive material of single ramming head disclosed by the invention on strip traffic direction;

Figure 14 A is the typical profile of the roughness index Ra value after TMW-EPS impelling de-scaling on plate width direction;

Figure 14 B is the typical profile of the roughness index Ra value after impelling de-scaling disclosed by the invention on plate width direction.

In figure, 1 centrifuge blade, head is got rid of in 2 throwings, and 2a, 2b, 2c, 2d are that head is got rid of in four throwings be arranged at above metal plate and belt, 3a, 3b are respectively the feed pipe corresponding to 2a, 2b etc., 4 jet of stock being mixed with abrasive grain, 5,5a, 5b be metal plate and belt, 6,6a, 6b is respectively flushing crossbeam, 7 low-pressure washing jets, and 8a, 8b, 8c, 8d are respectively and throw corresponding to 2a, 2b, 2c, 2d etc. the central axis, the width centreline on 9 strip traffic directions that get rid of head and rotate.

10a, 10b: for the throwing of two group being arranged at metal plate and belt side gets rid of head, 11a, 11b: for the jet of head is got rid of in the throwing of two group being arranged at metal plate and belt side.

12a, 12c are respectively jet intensity attenuation region, and 12b is effective stream intensity area, 12a+12b+12c: total jet intensity region.

13a, 13c are respectively jet intensity attenuation region, and 13b is effective stream intensity area, 13a+13b+13c: total jet intensity region.W1 and w2 is respectively the throwing being arranged at described metal plate and belt upper and lower and gets rid of an angular velocity of rotation.

P1 is according on plate width direction of the present invention, a jet attenuation region (width) is got rid of in throwing, p2 is according on plate width direction of the present invention, throw and get rid of the flat region (width) of an effective stream, p3 be according in effective stream region on plate width direction of the present invention, two throwings of adjacent dislocation get rid of the overlap-add region (width) of head.

△ P1 is according to of the present invention, be present in the less strength difference value between Pao Shuaitou local peaking and uniform flat line, △ P2 was present in the Typical strengths difference value between two Ge Paoshuaitou local peaking overlap-add region crosspoints (valley point) of adjacent dislocation and the jet attenuation region crosspoint of Pao Shuaitou local peaking in the past, △ P3 was present in throw to get rid of a local center peak value and be adjacent Typical strengths difference value between crosspoint, local peaking region in the past, △ Ra-1 is the roughness concentration index Ra value (international standard of TMW-EPS on plate width direction, the key index of roughness) fluctuating range value, Ra1 is the arithmetic mean of instantaneous value of TMW-EPS Ra value on plate width direction, △ Ra-2 is the fluctuating range value of the roughness concentration index Ra value (international standard, the key index of roughness) on plate width direction disclosed by the invention, Ra2 is the arithmetic mean of instantaneous value of Ra value on plate width direction disclosed by the invention,

Detailed description of the invention

A metal plate and belt surface treatment method for the centrifugal impelling abrasive of wet method, arranges centrifugal impelling throwing in pairs at described metal plate and belt upper and lower and gets rid of head.Thrown by described centrifugal impelling and get rid of head to be mixed with the continuous impact that mixed at high speed fluid carries out evenly cold conditions metal plate and belt surface, full plate is wide, the grinding of abrasive grain, thus realize to cold conditions metal plate and belt wide up and down-namely full plate face carry out continuously, surface treatment uniformly.

Described metal plate and belt is the steel grade that a firecoat distribution presents typical uneven characteristic, namely, scale presents the thickness difference of both sides and zone line at 3um ~ 10um on metal plate and belt width, or, scale at the head-tail of metal plate and belt length direction and the thickness difference of zone line at 5um ~ 15um.

Because of the deformed steel strip of metal plate and belt or tension fluctuation cause band steel during impelling de-scaling plate face jitter distance in the scope of 20mm-~ 100mm.

A rotating shaft is got rid of in described throwing and metal plate and belt width (or metal plate and belt traffic direction) angle in a certain angle is arranged.

Get rid of 2a citing with single centrifugal, other centrifugals get rid of identical.Centrifugal gets rid of on a 2a and is provided with multi-disc centrifuge blade 1a, and centrifugal gets rid of a 2a under the effect of external drive source, drives the multi-disc centrifuge blade 1a in the portion that is fixed thereon to rotate with same angular speed w1 together.

Blade 1a centrifugal gets rid of the maximum outside diameter that an exradius is greater than feed pipe 3a, under this differences in angle w1 effect, after slurry transferring to feed pipe 3a (feed pipe 3a is communicated with, be arranged at centrifugal gets rid of a 2a axle portion) inside, flow on the blade 1a of High Rotation Speed, process is got rid of in the throwing that the entirety realizing slurry 4 is accelerated.

Because blade 1a exradius is obviously greater than the maximum outside diameter of feed pipe 3a, be mixed with solid abrasive particle and liquid (can be the liquid such as oil, water, especially water), mixture-the slurry 4 of this two media, after being delivered to feed pipe 3a inside, centrifugal gets rid of a 2a and under the effect of external drive source, produces a fixed angular speed w1 rotate, and drive the multi-disc centrifuge blade 1a in the portion that is fixed thereon to rotate with same angular speed together, its angular velocity of rotation value equals w1 equally simultaneously.

Described feed pipe 3a, throw the rotary motion of getting rid of a 2a and blade 1a and all get rid of a rotation around same throwing, i.e. central axis 8, with same angular speed High Rotation Speed.

Main body arrangement of the present invention is see shown in Fig. 1 ~ Fig. 6.

Embodiment 1

The continuity de-scaling of cold conditions steel plate, specific as follows:

(temperature is not higher than the carbon steel strip of 200 DEG C for cold conditions band steel 5, width is 600mm, thickness 5mm, for Total continuity welded type end to end) to be moved to by roller-way and get rid of the head (2a in accompanying drawing by the throwing up and down of two groups each 4, 2b, 2c, 2d represents that 4 upthrows get rid of head respectively, it is identical with it that head is got rid of in 4 corresponding lower throwings, omission repeats) corresponding form effective de-scaling region time, throw up and down and get rid of the feed pipe 3 of head by arranging in the middle part of it, a large amount of slurries 4 being mixed with abrasive grain is carried to impeller 1, feed pipe 3 diameter of bore is 200mm, containing granularity in the slurry 4 of its delivered inside is G50 (in abrasive grain, the abrasive grain particle diameter of 80% quantity is the multi-angular shape of 0.33mm) steel sand, the volume by volume concentration of this steel sand and water is 25%.This slurry is passing through feed pipe 3 to blade 1 with 20m ³the speed conveying of/min.

Described upthrow gets rid of 2a, 2b, 2c, 2d and gets rid of period at centrifugal, and its centrifugal rotation direction can be identical, also can be mutually different.

Described throwing gets rid of 2a, 2b, 2c, 2d when realizing carrying out surface treatment operation to the wide face of metal plate and belt 5, and each throwing is got rid of 2a, 2b, 2c, 2d on the width of metal plate and belt 5, realized dislocation arrangement.

2a, 2b, 2c, 2d are got rid of in described multiple throwing, the equal strict conformance of distance value between head is got rid of in its two throwings nearest on metal plate and belt 5 width, 2a, 2b, 2c, 2d are got rid of in described multiple throwing, its distance values on metal plate and belt 5 length direction, interferes for arranging benchmark not produce between jet.

Now, (upthrow gets rid of the rotation that head produces w1 angular speed to throw the High Rotation Speed angular speed getting rid of head and produce up and down, the rotation that head produces w2 angular speed is got rid of in lower throwing) slurry 4 that feed pipe is carried is accelerated to target velocity and throw and get rid of, this angular velocity of rotation w=2000 turns/min, thrown by appropriate design and get rid of 2, the appearance and size of blade 1, realize with this angular speed w=2000 turn/min time, reach and final 60m/s linear velocity is accelerated to slurry 4 fly away from blade 1, effectively to destruction and the grinding of the surperficial firecoat of metal plate and belt 5, reach the effective removing to firecoat.It is 200mm that described centrifugal gets rid of its impeller width value of head,

Just the same for band another firecoat reset mode of wide of steel 5 and this face, just the lower throwing direction of rotation of getting rid of the angular velocity of rotation w2 of head is contrary.Ensure another even de-scaling target of wide of band steel 5.

Band steel 5 after de-scaling sprays the flushing crossbeam 6 of low-pressure water jet 7 by one, carry out low-pressure fuel injection flushing respectively, thus reach the target of the de-scaling of plate face, cleaning to two wide faces of band steel 5.

In the present embodiment, because of the deformed steel strip of metal plate and belt or tension fluctuation cause band steel during impelling de-scaling plate face jitter distance in the scope of 40mm-70mm.A rotating shaft is got rid of in described throwing and metal plate and belt width is that 15-25 ° of angle angle is arranged.Scale presents the thickness difference of both sides and zone line at 3um-7um on metal plate and belt width, or, scale at the head-tail of metal plate and belt length direction and the thickness difference of zone line at 5um-12um.

Experiment parameter illustrates:

Strip specification: 8.0mm is thick × and 1200mm is wide, and material is truck crossbeam carbon sheet;

Strip de-scaling requires: full plate is wide, the synchronous de-scaling process of positive and negative;

Medium kind: adopt the mixing jet of abrasive material and water to carry out high-speed grinding de-scaling;

The relatively experimental result record of TMW-EPS:

Embodiment 2

It is parallel with metal plate and belt width that a rotating shaft is got rid of in described throwing, namely vertical with metal plate and belt traffic direction.

De-scaling speed: the complete wide at the uniform velocity 20m/min of plate;

Medium kind: adopt the mixing jet of abrasive material and water to carry out high-speed grinding de-scaling; Described liquid medium can be common water for industrial use or the oily lipid medium possessing mobility.

When described liquid medium is general industry water: temperature below 100 DEG C, pH value is 6.5 ~ 9.

When described liquid medium is oily lipid medium, for having the mixes liquid material that the liquid of mobility or certain several liquid medium or dissolution of solid are formed after liquid medium, namely this medium is within the scope of normal temperature, and namely less than 100 DEG C are necessary for liquid state.

Described solid dielectric particle diameter is the spherical of 0.2mm ~ 0.5mm or cylindrical particle;

Described solid dielectric is carbide abrasives (as black silicon carbide, green silicon carbide, boron carbide etc.) and artificial class abrasive material, as shot and steel sand, or steel wire cut pill mixture.Now, shot and steel sand, or the proportioning of steel wire cut pill is at 1:1 ~ 1:5 proportion.

In the present embodiment, described metal plate and belt is specially scale and on metal plate and belt width, presents the thickness difference of both sides and zone line at 5um ~ 8um, or, scale at the head-tail of metal plate and belt length direction and the thickness difference of zone line at 7um ~ 10um.Because of the deformed steel strip of metal plate and belt or tension fluctuation cause band steel during impelling de-scaling plate face jitter distance in the scope of 20mm ~ 40mm.

The relatively experimental result of TMW-EPS:

Meanwhile, accessory system total power value corresponding reduction because of the reduction of impelling greatest service rate of the open scheme of the present invention, therefore, if the power reduction of related consideration accessory system, the TMW-EPS technique of descaling process Energy Efficiency Ratio disclosed by the invention promotes more than 10%.

Now feed pipe 3a, throwing gets rid of the rotary motion of a 2a and blade 1a all around same rotating shaft-central shaft 8 High Rotation Speed, and angular velocity of rotation is identical, is w1.Described angular speed is 2 × π × 1800 turn/min.

It is 16mm that described centrifugal gets rid of its impeller width value of head,

Now metal plate and belt 5 runs with stable linear velocity v1 along its length, now centrifugal gets rid of the speed of service v1 direction exact vertical of 2 and the central axis 8 that rotates of blade 1 above and metal plate and belt 5, and this central axis 8 is parallel to the plate face of metal plate and belt 5 simultaneously, then the direction of this axis 8 is the plate width direction of metal plate and belt 5, is also referred to as width.

Because feed pipe 3, blade 1 and throwing get rid of 2 same pivot axis 8 all complete with the width axis of symmetry 9 be with on steel 5 traffic direction vertical, therefore the flow of a 2 high speed jet of stock 4 produced on band steel 5 width is got rid of in throwing, speed equal distribution is all very consistent, this consistent performance well guarantees the firecoat removing uniformity be with on steel 5 degree of seeing direction.

For the reverse side firecoat realizing metal plate and belt 5 is removed, head is got rid of in the throwing arranging complete same model on another surface of this metal plate and belt 5, the feed pipe and blade that head are provided with same model are got rid of in this throwing, just the absolute value of angular velocity of rotation w2 and w1 is completely equal, and direction of rotation is antipodal direction.

2a, 2b, 2c, 2d are got rid of in described multiple throwing, and its centrifugal rotation direction can be identical, also can be mutually different;

Described multiple throwing gets rid of 2a, 2b, 2c, 2d when realizing carrying out surface treatment operation to the one-sided wide face of metal plate and belt 5, and each throwing is got rid of 2a, 2b, 2c, 2d on the width of metal plate and belt 5, realized dislocation arrangement; Described dislocation arrangement gets rid of the spaced set of head on metal plate and belt 5 traffic direction for throwing, or two throwings are got rid of head and are arranged at same width, and another two spaced sets on metal plate and belt 5 traffic direction are after the first two throws and get rid of head.

2a, 2b, 2c, 2d are got rid of in described multiple throwing, and the equal strict conformance of distance value between head is got rid of in its two throwings nearest on metal plate and belt 5 width; 2a, 2b, 2c, 2d are got rid of in described multiple throwing, its distance values on metal plate and belt 5 length direction, interfere for arranging benchmark not produce between jet.

According to the embodiment of the present invention, the mixing jet 4 that scheme produces is got rid of in described throwing, and metal plate and belt 5 width has the intensity distribution rule (see shown in Fig. 3 and Fig. 5) that typical two ends jet intensity P1 progressively decays, middle jet intensity P2 presents uniform flat.The ratio of width on whole jet distributed areas width (P1 × 2+P2) of an attenuation region (P1 × 2) is got rid of in described single throwing, that is, the jet intensity proportion of goods damageds are at 20-30%.

The present invention makes full use of the high-speed jet ablation that the centrifugal mode of getting rid of produces, achieve once even, continuous, the surface treatment efficiently to cold conditions metal plate firecoat, the present invention not only can be used for continuous de-scaling, the processing of rust removing of metal plate and belt, can be used for the continuous process to surfaces externally and internallies such as different in nature metal material, scattered foundry goods simultaneously.Because technology that the present invention adopts is ripe, can implement, apply feasible.On the other hand, the present invention well can adapt to the requirement of company to the environmental requirement of metallurgical production and further improving product competitiveness, improves the ability of the energy-saving and emission-reduction of smelter.Therefore, the present invention has broad application prospects at cold rolling production field.

Claims

1. a metal plate and belt surface treatment method for the centrifugal impelling abrasive of wet method, is provided with processing unit, and described processing unit comprises centrifugal impelling throwing and gets rid of head, for carrying out surface treatment to entering the cold conditions metal plate and belt surface before cold-rolling mill, it is characterized in that,

Described centrifugal impelling gets rid of the feed pipe of head by connecting on it with throwing, jet is formed with the mixed at high speed fluid slurry being mixed with abrasive grain, cold conditions metal plate and belt surface is carried out evenly, continuous impact that full plate is wide, grinding, thus realize to cold conditions metal plate and belt wide up and down-namely full plate face carry out continuously, surface treatment uniformly;

2. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 1, is characterized in that, arrange centrifugal impelling throwing get rid of head in the paired correspondence of described metal plate and belt upper and lower;

Described centrifugal gets rid of on head and is provided with 4 ~ 20 centrifuge blades, and centrifugal gets rid of head under the effect of external drive source, drives the centrifuge blade be fixed thereon to rotate with same angular speed together,

Centrifuge blade exradius is greater than the maximum outside diameter of feed pipe, after slurry transferring to feed pipe inside, flows on the centrifuge blade of High Rotation Speed, and process is got rid of in the throwing that the entirety realizing slurry is accelerated.

3. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 1 or 2, it is characterized in that, described centrifugal gets rid of on head and is provided with 4 ~ 8 centrifuge blades.

4. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 1 or 2, it is characterized in that, the rotary motion that described feed pipe, throwing get rid of head and blade all gets rid of a rotation around same throwing, i.e. central axis, with same angular speed High Rotation Speed, but direction of rotation is contrary.

5. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 1 or 2, is characterized in that, head, feed pipe magnitude setting 2-16 are got rid of in described throwing, and its magnitude setting is identical, forms a processing unit.

6. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 1 or 2, is characterized in that,

Described jet, metal plate and belt width has typical two ends jet intensity, and progressively attenuation region and middle jet intensity present the intensity distribution rule in uniform flat region;

Described middle jet intensity region is metal plate and belt surface-treated effective stream processing region.

7. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 6, it is characterized in that, the ratio of width on whole jet distributed areas width (P1 × 2+P2) that an attenuation region (P1 × 2) is got rid of in described single throwing is 10-30%.

8. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 5, it is characterized in that, described throwing gets rid of head when realizing carrying out surface treatment operation to metallic plate bandwidth face, each throwing is got rid of head on the width of metal plate and belt, is realized dislocation arrangement, its requirement that specifically misplaces is: the jet intensity that head is got rid of in each throwing has one to map distribution curve at plate width direction, the regularity of distribution that this curve presents " two ends decay-neutral straight ", and the width value of its flat segments (P2+P1) is the magnitude of misalignment on width between every two ramming heads.

9. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 1 or 2, is characterized in that,

The liquid medium of described slurry is selected from water for industrial use or possesses the oily lipid medium of mobility, when described liquid medium is general industry water, temperature below 100 DEG C, pH value 6.5 ~ 9,

When described liquid medium is oily lipid medium, for having the mixes liquid material that the liquid of mobility or certain several liquid medium or dissolution of solid are formed after liquid medium.

10. the metal plate and belt surface treatment method of the centrifugal impelling abrasive of a kind of wet method as claimed in claim 1 or 2, is characterized in that,

The solid dielectric particle diameter of described slurry is 0.1mm ~ 2.0mm, described solid dielectric shape is spherical, column, multi-angular shape particle preferably, or more than two kinds mixtures, described solid dielectric is selected from the intermetallic composite coating ball class of natural corundum class abrasive material, carbide abrasives, artificial class abrasive material, shot, steel sand, steel wire cut pill

Described natural corundum class abrasive material is selected from Brown Alundum, white fused alumina, single alundum,

Described carbide abrasives is selected from black silicon carbide, green silicon carbide, boron carbide.

The metal plate and belt surface treatment method of 11. centrifugal impelling abrasives of a kind of wet method as claimed in claim 1 or 2, it is characterized in that, described metal plate and belt is the steel grade that a firecoat distribution presents typical uneven characteristic, namely, scale presents the thickness difference of both sides and zone line at 5um ~ 10um on metal plate and belt width, or, scale at the head-tail of metal plate and belt length direction and the thickness difference of zone line at 7um ~ 15um.

The metal plate and belt surface treatment method of 12. centrifugal impelling abrasives of a kind of wet method as claimed in claim 1 or 2, it is characterized in that, described method is applicable to metal plate and belt deformed steel strip, or cause strip strip plate face jitter distance during impelling de-scaling because of tension fluctuation, namely " unrestrained high level " is more than 20mm, but is no more than the operating mode of 100mm.

The metal plate and belt surface processing device of 13. 1 kinds of centrifugal impelling abrasives of wet method, be provided with processing unit, described processing unit comprises centrifugal impelling throwing and gets rid of head, for carrying out surface treatment to entering the cold conditions metal plate and belt surface before cold-rolling mill, it is characterized in that, described processing unit comprises:

The metal plate and belt surface processing device of 14. centrifugal impelling abrasives of a kind of wet method as claimed in claim 13, is characterized in that,

15. as described in claim 13 or 14 the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method, it is characterized in that, described centrifugal gets rid of on head and is provided with 4 ~ 8 centrifuge blades.

16. as described in claim 13 or 14 the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method, it is characterized in that, the rotary motion that described feed pipe, throwing get rid of head and blade all gets rid of a rotation around same throwing, i.e. central axis, with same angular speed High Rotation Speed, but direction of rotation is contrary.

17. as described in claim 13 or 14 the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method, it is characterized in that, head, feed pipe magnitude setting 2 ~ 16 is got rid of in described throwing, and its magnitude setting is identical, forms a processing unit.

The metal plate and belt surface processing device of 18. centrifugal impelling abrasives of a kind of wet method as claimed in claim 17, it is characterized in that, the ratio of width on whole jet distributed areas width (P1 × 2+P2) of an attenuation region (P1 × 2) is got rid of in described single throwing, that is, the jet intensity proportion of goods damageds are 10 ~ 30%.

The metal plate and belt surface processing device of 19. centrifugal impelling abrasives of a kind of wet method as claimed in claim 17, it is characterized in that, described throwing gets rid of head when realizing carrying out surface treatment operation to the one-sided wide face of metal plate and belt, each throwing is got rid of head on the width of metal plate and belt, is realized dislocation arrangement, its requirement that specifically misplaces is: the jet intensity that head is got rid of in each throwing has one to map distribution curve at plate width direction, the regularity of distribution that this curve presents " two ends decay-neutral straight ", and the width value of its flat segments P2+P1 is the magnitude of misalignment on width between every two ramming heads.

20. as described in claim 13 or 14 the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method, it is characterized in that,

The liquid medium of described slurry 4 is selected from water for industrial use or possesses the oily lipid medium of mobility, when described liquid medium is general industry water, temperature below 100 DEG C, pH value 6.5 ~ 9,

21. as described in claim 13 or 14 the metal plate and belt surface processing device of the centrifugal impelling abrasive of a kind of wet method, it is characterized in that,

The solid dielectric particle diameter of described slurry 4 is 0.1mm ~ 2.0mm, described solid dielectric shape preferably spherical or cylindrical particle, described solid dielectric is selected from the intermetallic composite coating ball class of natural corundum class abrasive material, carbide abrasives, artificial class abrasive material, shot, steel sand, steel wire cut pill