CN107971355B - A kind of spray angle optimal setting method of secondary cold-rolling unit Emulsified liquid nozzle - Google Patents

A kind of spray angle optimal setting method of secondary cold-rolling unit Emulsified liquid nozzle Download PDF

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Publication number
CN107971355B
CN107971355B CN201711285391.6A CN201711285391A CN107971355B CN 107971355 B CN107971355 B CN 107971355B CN 201711285391 A CN201711285391 A CN 201711285391A CN 107971355 B CN107971355 B CN 107971355B
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nozzle
spray angle
emulsified liquid
cold
emulsion
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CN107971355A (en
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白振华
董航喆
崔熙颖
雷彤
崔亚亚
刘亚星
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Tangshan grano Metal Technology Co., Ltd
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Yanshan University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239Lubricating
    • B21B45/0245Lubricating devices
    • B21B45/0248Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0266Measuring or controlling thickness of liquid films

Abstract

A kind of spray angle optimal setting method of secondary cold-rolling unit Emulsified liquid nozzle, it is the following steps are included: the spray angle that (A) collects secondary cold-rolling unit Emulsified liquid nozzle optimizes required technical parameter;(B) optimization object function optimal value F is initializedy, and given optimization step delta θ;(C) optimization process parameter i is defined, and initializes i=0;(D) nozzle spray angle θ is calculatedi;(E) single-nozzle emulsion flux density cross direction profiles q is calculated1i(xj);(F) N number of nozzle is calculated in the superimposed emulsification flow quantity cross direction profiles q of belt steel surfaceNi(xj);(G) secondary cold-rolling process strip width range internal emulsification flow quantity cross direction profiles q is calculatedi(xj);(H) Emulsified liquid nozzle spray angle optimization object function F (θ is calculatedi);(I) judge F (θi) < FyIt is whether true;(J) judge θi≤θmaxIt is whether true;(K) secondary cold-rolling unit Emulsified liquid nozzle spray angle optimal value θ is exportedy.The present invention is able to ascend secondary cold-rolling unit belt plate shape quality, reduces belt steel surface emulsion strip mottling and lacks incidence.

Description

A kind of spray angle optimal setting method of secondary cold-rolling unit Emulsified liquid nozzle
Technical field
The invention belongs to cold rolling technology field, in particular to a kind of spray angle of secondary cold-rolling unit Emulsified liquid nozzle is excellent Change setting method.
Background technique
Secondary cold-rolling is further to depress strip after once cold rolling and annealing and be thinned, to improve the hardness of material And intensity, it can be with relatively thin thickness by enough can body intensity, effectively save steel material consumption reduces cost, reduces Environmental pollution, to well adapt to pack the development trend of tank industry processed.Due to secondary cold-rolling product thickness is thin, intensity is high, Percentage pass reduction is big, and higher to plate shape, surface quality requirements, therefore carries out rolling lubrication frequently with emulsion direct-injection system. Conventional secondary cold-rolling direct-injection system is mainly by emulsion mixing tank, emulsion spray pump, emulsion spray frame, Emulsified liquid nozzle Composition, wherein Emulsified liquid nozzle is mounted on emulsion spray frame along strip width according to specific injector spacing.Secondary cold-rolling In unit production process, the emulsion in emulsion mixing tank is transported to emulsion spray frame by emulsion spray pump, via cream Change the Emulsified liquid nozzle installed on liquid spraying rack and is injected in belt steel surface, the oil before strip enters rolling roll gap, in emulsion Drop is gradually adsorbed on belt steel surface, forms certain thickness oil film, oil film enters rolling roll gap with strip together, in the operation of rolling In play lubricating action.
During secondary cold rolling, the emulsification flow quantity ejected due to Emulsified liquid nozzle is not equal along strip width direction Equal distribution, apart from nozzle center position remoter, emulsion flux density larger in nozzle center's position emulsion flux density It is smaller;In addition, the emulsion that multiple nozzles eject on emulsion spray frame is in strip width direction, there are partial intersection overlappings The emulsification flow quantity of position, the distribution of these position belt steel surfaces is then the superposition of multiple nozzle flows.In this way, spray belt steel surface Emulsifying flow quantity has certain nonuniformity, leads to the uneven distribution of strip lateral greasy property in rolling roll gap, And then influence plate shape and surface quality after belt steel rolling.The spray angle size of Emulsified liquid nozzle is directly related to emulsion and exists The jet width and flow distribution of belt steel surface are secondary cold-rolling process belt steel surface emulsification flow quantity cross direction profiles uniformities Important factor in order.
Summary of the invention
The purpose of the present invention is to provide one kind to be able to ascend secondary cold-rolling unit belt plate shape quality, reduces belt steel surface Emulsion strip mottling lacks the spray angle optimal setting method of the secondary cold-rolling unit Emulsified liquid nozzle of incidence.Master of the present invention If emulsifying flow quantity edge establishing in conjunction with the equipment and technology feature of secondary cold-rolling unit direct-injection system emulsified liquid injection gear On the basis of the distribution in strip width direction and the mathematical relationship of Emulsified liquid nozzle spray angle, in Emulsified liquid nozzle spray angle In the range of the adjustment of permission, the spray angle of optimal setting secondary cold-rolling unit Emulsified liquid nozzle is the selected of nozzle model Provide the necessary technical guarantee.
The present invention includes following step performed by computer:
(A) spray angle for collecting secondary cold-rolling unit Emulsified liquid nozzle optimizes required technical parameter, comprising: nozzle Quantity N, injector spacing L, nozzle jetting height H, nozzle spray direction angle α, nozzle angle of heelNozzle injection flow Q, strip Width maximum value Bmax, nozzle spray angle minimum value θmin, nozzle spray angle maximum value θmax
(B) Emulsified liquid nozzle spray angle optimization object function optimal value F is initializedy, and given nozzle spray angle is excellent Change step delta θ.
(C) nozzle spray angle optimization process parameter i is defined, and initializes i=0.
(D) the corresponding nozzle spray angle θ of nozzle spray angle optimization process parameter i is calculatedimin+iΔθ。
(E) single-nozzle emulsion flux density cross direction profiles q is calculated1i(xj):
In formula, j is emulsification flow quantity transverse injection width item member Position Number;ψ is that emulsification flow quantity cross direction profiles influence Coefficient,BLFor jet width on the left of single-nozzle emulsion spray centerline,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member number of jet width on the left of single-nozzle emulsion spray centerline,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline,xj For the corresponding position emulsification flow quantity transverse injection width item member Position Number j, xj=(j-nL-1)Δx;Δ x is emulsification liquid stream Measure the interval width of transverse injection width item member position.
(F) N number of nozzle is calculated in the superimposed emulsification flow quantity cross direction profiles q of belt steel surfaceNi(xj):
In formula, k is emulsification flow quantity cross direction profiles additive process parameter;nMFor the corresponding item member number of injector spacing,nNFor the corresponding item member number of jet width after the emulsion flow summation of N number of nozzle in belt steel surface, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity transverse injection width item member position xjCorresponding emulsion flow summation system Number,
(G) secondary cold-rolling process strip width range internal emulsification flow quantity cross direction profiles q is calculatedi(xj):
In formula, nSFor strip width maximum value BmaxCorresponding Cross slat member number,
(H) Emulsified liquid nozzle spray angle optimization object function F (θ is calculatedi):
In formula, λ is weight coefficient, 0 < λ < 1.
(I) judge F (θi) < FyIt is whether true? if so, then enable Emulsified liquid nozzle spray angle optimization object function most Figure of merit Fy=F (θi), the optimal solution θ of Emulsified liquid nozzle spray angleyi, it is transferred to step (J);If not, directly it is transferred to step Rapid J).
(J) judge θi≤θmaxIt is whether true? if so, i=i+1 is then enabled, step (D) is transferred to;If not, then it is transferred to Step (K).
(K) secondary cold-rolling unit Emulsified liquid nozzle spray angle optimal value θ is exportedy, complete secondary cold-rolling unit emulsion The optimal setting of nozzle spray angle.
The invention has the following advantages over the prior art:
By the spray angle of reasonable optimal setting Emulsified liquid nozzle, belt steel surface emulsification flow quantity can be effectively improved Along the uniformity of strip width directional spreding, and then the strip shape quality of secondary cold rolling set product is improved, reduces belt steel surface cream Change the generation of liquid strip mottling defect, is the selected guarantee that provides the necessary technical of nozzle model.
Detailed description of the invention
Fig. 1 is total calculation flow chart of the invention;
Fig. 2 is flow cross direction profiles figure before the spray angle of the corresponding Emulsified liquid nozzle of embodiment 1 optimizes;
Fig. 3 is flow cross direction profiles figure after the spray angle of the corresponding Emulsified liquid nozzle of embodiment 1 optimizes;
Fig. 4 is flow cross direction profiles figure before the spray angle of the corresponding Emulsified liquid nozzle of embodiment 2 optimizes;
Fig. 5 is flow cross direction profiles figure after the spray angle of the corresponding Emulsified liquid nozzle of embodiment 2 optimizes;
Specific embodiment
Embodiment 1
By taking certain secondary cold-rolling unit as an example, the spray angle according to secondary cold-rolling unit Emulsified liquid nozzle shown in FIG. 1 is excellent Change total calculation process of setting method:
Firstly, the spray angle for collecting secondary cold-rolling unit Emulsified liquid nozzle optimizes required apparatus and process in step (A) Parameter, comprising: nozzle quantity N=10, injector spacing L=120mm, nozzle jetting height H=200mm, nozzle spray direction angle α =57 °, nozzle angle of heelNozzle injection flow Q=1.03L/min, strip width maximum value Bmax=1050mm, spray Nozzle spray angle minimum value θmin=50 °, nozzle spray angle maximum value θmax=100 °.
Then, in step (B), Emulsified liquid nozzle spray angle optimization object function optimal value F is initializedy=1000, And given nozzle spray angle optimizes step delta θ=0.1 °.
Then, in step (C), nozzle spray angle optimization process parameter i is defined, and initialize i=0.
Then, in step (D), the corresponding nozzle spray angle θ of nozzle spray angle optimization process parameter i is calculatedi= θmin+iΔθ。
Then, in step (E),;Choose the interval width Δ x=of emulsification flow quantity transverse injection width item member position 1.0mm calculates single-nozzle emulsion flux density cross direction profiles q1i(xj):
In formula, j is emulsification flow quantity transverse injection width item member Position Number;ψ is that emulsification flow quantity cross direction profiles influence Coefficient,BLFor jet width on the left of single-nozzle emulsion spray centerline,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member of jet width on the left of single-nozzle emulsion spray centerline Number,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline,xjFor the corresponding position emulsification flow quantity transverse injection width item member Position Number j, xj=(j-nL-1)Δx。
Then, in step (F), N number of nozzle is calculated in the superimposed emulsification flow quantity cross direction profiles q of belt steel surfaceNi (xj):
In formula, k is emulsification flow quantity cross direction profiles additive process parameter;nMFor the corresponding item member number of injector spacing,nNFor the corresponding item member of jet width after the emulsion flow summation of N number of nozzle in belt steel surface Number, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity transverse injection width item member position xjCorresponding emulsification flow quantity is folded Add coefficient,
Then, in step (G), strip width maximum value BmaxCorresponding Cross slat member numberCalculate secondary cold-rolling process strip width range internal emulsification flow quantity cross direction profiles qi(xj):
Then, in step (H), weight selection coefficient lambda=0.6 calculates Emulsified liquid nozzle spray angle optimization aim letter Number F (θi):
Then, in step (I), judge F (θi) < FyIt sets up, then enables Emulsified liquid nozzle spray angle optimization object function Optimal value Fy=F (θi), the optimal solution θ of Emulsified liquid nozzle spray angleyi, it is transferred to step (J).
Then, in step (J), judge θi≤θmaxIt sets up, then enables i=i+1, be transferred to step (D);Calculating is circuited sequentially, Until θi≤θmaxIt is invalid, then it is transferred to step (K).
Finally, exporting the spray angle optimal value θ of secondary cold-rolling unit Emulsified liquid nozzle in step (K)y=58.7 °, Complete the optimal setting of the spray angle of secondary cold-rolling unit Emulsified liquid nozzle.
As shown in table 1, it can be seen that the spray angle of secondary cold-rolling unit Emulsified liquid nozzle after optimization in conjunction with Fig. 3, Fig. 4 Optimization object function falls to 0.1125 from 0.1793, and emulsion flux density undulate quantity drops to from 2.54L/min/m 1.74L/min/m, emulsion is more uniform along the distribution of strip width directional flow, and it is horizontal to improve strip greasy property in roll gap To uniformity, incidence that the promotion and surfactant emulsion liquid strip mottling for being conducive to secondary cold-rolling unit belt plate shape quality lack It reduces.
The spray angle optimization front and back flow cross direction profiles comparison of the corresponding Emulsified liquid nozzle of 1 embodiment of table 1
Before optimization After optimization
Emulsified liquid nozzle spray angle (°) 71.0 58.7
Emulsified liquid nozzle spray angle optimization object function 0.1793 0.1125
Emulsion flux density maximum value (L/min/m) 9.43 9.02
Emulsion flux density minimum value (L/min/m) 6.89 7.28
Emulsion flux density average value (L/min/m) 8.48 8.59
Emulsion flux density undulate quantity (L/min/m) 2.54 1.74
Embodiment 2:
By taking certain secondary cold-rolling unit as an example:
Firstly, the spray angle for collecting secondary cold-rolling unit Emulsified liquid nozzle optimizes required apparatus and process in step (A) Parameter, comprising: nozzle quantity N=10, injector spacing L=120mm, nozzle jetting height H=150mm, nozzle spray direction angle α =68 °, nozzle angle of heelNozzle injection flow Q=0.80L/min, strip width maximum value Bmax=1000mm, spray Nozzle spray angle minimum value θmin=50 °, nozzle spray angle maximum value θmax=100 °.
Then, in step (B), Emulsified liquid nozzle spray angle optimization object function optimal value F is initializedy=1000, And given nozzle spray angle optimizes step delta θ=0.1 °.
Then, in step (C), nozzle spray angle optimization process parameter i is defined, and initialize i=0.
Then, in step (D), the corresponding nozzle spray angle θ of nozzle spray angle optimization process parameter i is calculatedi= θmin+iΔθ。
Then, in step (E),;Choose the interval width Δ x=of emulsification flow quantity transverse injection width item member position 1.0mm calculates single-nozzle emulsion flux density cross direction profiles q1i(xj):
In formula, j is emulsification flow quantity transverse injection width item member Position Number;ψ is that emulsification flow quantity cross direction profiles influence Coefficient,BLFor jet width on the left of single-nozzle emulsion spray centerline,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member of jet width on the left of single-nozzle emulsion spray centerline Number,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline,xjFor the corresponding position emulsification flow quantity transverse injection width item member Position Number j, xj=(j-nL-1)Δx。
Then, in step (F), N number of nozzle is calculated in the superimposed emulsification flow quantity cross direction profiles q of belt steel surfaceNi (xj):
In formula, k is emulsification flow quantity cross direction profiles additive process parameter;nMFor the corresponding item member number of injector spacing,nNFor the corresponding item member of jet width after the emulsion flow summation of N number of nozzle in belt steel surface Number, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity transverse injection width item member position xjCorresponding emulsification flow quantity is folded Add coefficient,
Then, in step (G), strip width maximum value BmaxCorresponding Cross slat member numberCalculate secondary cold-rolling process strip width range internal emulsification flow quantity cross direction profiles qi(xj):
Then, in step (H), weight selection coefficient lambda=0.6 calculates Emulsified liquid nozzle spray angle optimization aim letter Number F (θi):
Then, in step (I), judge F (θi) < FyIt sets up, then enables Emulsified liquid nozzle spray angle optimization object function Optimal value Fy=F (θi), the optimal solution θ of Emulsified liquid nozzle spray angleyi, it is transferred to step (J).
Then, in step (J), judge θi≤θmaxIt sets up, then enables i=i+1, be transferred to step (D);Calculating is circuited sequentially, Until θi≤θmaxIt is invalid, then it is transferred to step (K).
Finally, exporting the spray angle optimal value θ of secondary cold-rolling unit Emulsified liquid nozzle in step (K)y=79.3 °, Complete the optimal setting of the spray angle of secondary cold-rolling unit Emulsified liquid nozzle.
As shown in table 2, it can be seen that the spray angle of secondary cold-rolling unit Emulsified liquid nozzle after optimization in conjunction with Fig. 4, Fig. 5 Optimization object function falls to 0.1103 from 0.3161, and emulsion flux density undulate quantity drops to from 3.39L/min/m 1.32L/min/m, emulsion is more uniform along the distribution of strip width directional flow, and it is horizontal to improve strip greasy property in roll gap To uniformity, incidence that the promotion and surfactant emulsion liquid strip mottling for being conducive to secondary cold-rolling unit belt plate shape quality lack It reduces.
The spray angle optimization front and back flow cross direction profiles comparison of the corresponding Emulsified liquid nozzle of 2 embodiment of table 2
Before optimization After optimization
Emulsified liquid nozzle spray angle (°) 65.0 79.3
Emulsified liquid nozzle spray angle optimization object function 0.3161 0.1103
Emulsion flux density maximum value (L/min/m) 8.17 7.00
Emulsion flux density minimum value (L/min/m) 4.78 5.68
Emulsion flux density average value (L/min/m) 6.72 6.68
Emulsion flux density undulate quantity (L/min/m) 3.39 1.32

Claims (1)

1. a kind of spray angle optimal setting method of secondary cold-rolling unit Emulsified liquid nozzle, it is characterised in that: it includes following Step performed by computer:
(A) spray angle for collecting secondary cold-rolling unit Emulsified liquid nozzle optimizes required technical parameter, comprising: nozzle quantity N, injector spacing L, nozzle jetting height H, nozzle spray direction angle α, nozzle angle of heelNozzle injection flow Q, strip width Maximum value Bmax, nozzle spray angle minimum value θmin, nozzle spray angle maximum value θmax
(B) Emulsified liquid nozzle spray angle optimization object function optimal value F is initializedy, and given nozzle spray angle optimizes step-length Δθ;
(C) nozzle spray angle optimization process parameter i is defined, and initializes i=0;
(D) the corresponding nozzle spray angle θ of nozzle spray angle optimization process parameter i is calculatedimin+iΔθ;
(E) single-nozzle emulsion flux density cross direction profiles q is calculated1i(xj):
In formula, j is emulsification flow quantity transverse injection width item member Position Number;ψ is that emulsification flow quantity cross direction profiles influence coefficient,BLFor jet width on the left of single-nozzle emulsion spray centerline,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member number of jet width on the left of single-nozzle emulsion spray centerline,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline,xj For the corresponding position emulsification flow quantity transverse injection width item member Position Number j, xj=(j-nL-1)Δx;Δ x is emulsification liquid stream Measure the interval width of transverse injection width item member position;
(F) N number of nozzle is calculated in the superimposed emulsification flow quantity cross direction profiles q of belt steel surfaceNi(xj):
In formula, k is emulsification flow quantity cross direction profiles additive process parameter;nMFor the corresponding item member number of injector spacing,nNFor the corresponding item member number of jet width after the emulsion flow summation of N number of nozzle in belt steel surface, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity transverse injection width item member position xjCorresponding emulsion flow summation system Number,
(G) secondary cold-rolling process strip width range internal emulsification flow quantity cross direction profiles q is calculatedi(xj):
In formula, nSFor strip width maximum value BmaxCorresponding Cross slat member number,
(H) Emulsified liquid nozzle spray angle optimization object function F (θ is calculatedi):
In formula, λ is weight coefficient, 0 < λ < 1;
(I) judge F (θi) < FyIt is whether true? if so, then enable the optimal value of Emulsified liquid nozzle spray angle optimization object function Fy=F (θi), the optimal solution θ of Emulsified liquid nozzle spray angleyi, it is transferred to step J);If not, directly it is transferred to step (J);
(J) judge θi≤θmaxIt is whether true? if so, i=i+1 is then enabled, step (D) is transferred to;If not, then it is transferred to step (K);
(K) secondary cold-rolling unit Emulsified liquid nozzle spray angle optimal value θ is exportedy, complete the spray of secondary cold-rolling unit Emulsified liquid nozzle The optimal setting of firing angle degree.
CN201711285391.6A 2017-12-07 2017-12-07 A kind of spray angle optimal setting method of secondary cold-rolling unit Emulsified liquid nozzle Expired - Fee Related CN107971355B (en)

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US5460023A (en) * 1991-09-13 1995-10-24 International Rolling Mill Consultants Inc. Roll surface restoration system and method
JP2009248170A (en) * 2008-04-09 2009-10-29 Sumitomo Metal Ind Ltd Method and system for cooling t-shape steel
CN103611739A (en) * 2013-11-25 2014-03-05 济钢集团有限公司 Hot rolling laminar flow lateral spraying optimization calculation method
CN104582647A (en) * 2011-12-12 2015-04-29 艾诺维亚股份有限公司 Ejector mechanism, ejector device, and methods of use
CN106311754A (en) * 2016-09-14 2017-01-11 燕山大学 Emulsified liquid flow dynamic and comprehensive optimization setting method suitable for cold continuous rolling unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5460023A (en) * 1991-09-13 1995-10-24 International Rolling Mill Consultants Inc. Roll surface restoration system and method
JP2009248170A (en) * 2008-04-09 2009-10-29 Sumitomo Metal Ind Ltd Method and system for cooling t-shape steel
CN104582647A (en) * 2011-12-12 2015-04-29 艾诺维亚股份有限公司 Ejector mechanism, ejector device, and methods of use
CN103611739A (en) * 2013-11-25 2014-03-05 济钢集团有限公司 Hot rolling laminar flow lateral spraying optimization calculation method
CN106311754A (en) * 2016-09-14 2017-01-11 燕山大学 Emulsified liquid flow dynamic and comprehensive optimization setting method suitable for cold continuous rolling unit

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