CN110142303A - A kind of controlled cooling device in steel rolling Bar Wire Product production process - Google Patents
A kind of controlled cooling device in steel rolling Bar Wire Product production process Download PDFInfo
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- CN110142303A CN110142303A CN201910422465.9A CN201910422465A CN110142303A CN 110142303 A CN110142303 A CN 110142303A CN 201910422465 A CN201910422465 A CN 201910422465A CN 110142303 A CN110142303 A CN 110142303A
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- 238000001816 cooling Methods 0.000 title claims abstract description 107
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 52
- 239000010959 steel Substances 0.000 title claims abstract description 52
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000005096 rolling process Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 131
- 238000007599 discharging Methods 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 12
- 239000011324 bead Substances 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 abstract description 21
- 230000001965 increasing effect Effects 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 229910052720 vanadium Inorganic materials 0.000 description 9
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
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- 229910052758 niobium Inorganic materials 0.000 description 5
- 239000010955 niobium Substances 0.000 description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 241000826860 Trapezium Species 0.000 description 4
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- 229910000734 martensite Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
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- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000628 Ferrovanadium Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
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- -1 ferrovanadium nitride Chemical class 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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- 229910052742 iron Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices 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
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0224—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for wire, rods, rounds, bars
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The present invention relates to the controlled cooling devices in a kind of steel rolling stick line production process, including water cooling box and the cooling unit being set in water cooling box, cooling unit includes one group of cooler set gradually along the feedstock direction of rolled piece, cooler is fixedly connected by installation unit with water cooling box, cooler includes shell, the intracorporal feed guide pipe of shell is set in turn in along the feedstock direction of rolled piece, intermediate guide pipe and discharging guide pipe, the intake antrum connecting by shell inlet opening with cabinet inlet opening is provided on shell, the discharge end of feed guide pipe is located in intake antrum and is provided with gap between intermediate guide pipe, intake antrum end, distinguish trapezoidal structure in the cross section of the inner cavity both ends of intermediate guide pipe and the inner cavity front end for the guide pipe that discharges, the device substantially reduces cooling water pressure, and reduce the formation of air film, realize cooling efficient low-consume , the intensity and toughness of steel rolling stick line is largely increased.
Description
Technical field
The invention belongs to Rolling production equipment technical fields, are related to a kind of cooling device, specifically a kind of steel rolling stick
Controlled cooling device during wire production.
Background technique
With China's steel career development grow, how to enhance product performance, achieve the purpose that it is energy-saving become future
The developing direction of iron and steel enterprise.The method that Most current enterprise is all made of microalloying method produces III grade of spiral, improves
The content of vanadium or niobium improves spiral intensity using the precipitation strength effect of vanadium or the carbonitride of niobium, but improves vanadium or niobium
Content again product cost is greatly improved.Therefore, temperature control technique is applied and becomes China's structural steel from now in rolling process
A kind of should be widely promoted feasible, economic of production and the technology used, by using METAL HEATING PROCESS, rolling and cold
But the rolling mill practice rationally controlled optimizes steel microstructure, increases substantially the intensity of reinforcing bar.
The cooling means that steel mill generallys use at present is that water purification direct-injection is cooling, big to advise in order to reach better cooling effect
When lattice bar production, cooling efficiency usually is improved with the mode for increasing hydraulic pressure, but excessively high hydraulic pressure increases energy consumption accordingly,
And improve the risk in production process；Under traditional high pressure methods for cooling, very due to cooled rolled piece wall surface temperature
Height, boiling heat transfer are in the film boiling stage, and rolled piece surface will form one layer of air film, and cooling water and rolled piece is prevented further to connect
Touching, greatly reduces boiling heat transfer coefficient, reduces heat transfer efficiency, influence production efficiency, simultaneously because the cooling effect of steel
Fruit is undesirable, and the product quality produced also is affected, and reduces the quality of product.
Summary of the invention
In view of the deficiencies of the prior art, cold the present invention provides the controlled cooling device in a kind of steel rolling stick line production process
But water pressure substantially reduces, and reduces the formation of air film, realizes cooling efficient low-consume, the intensity and toughness of steel rolling stick line
It is largely increased.
The technical solution adopted by the present invention is that:
Controlled cooling device in a kind of steel rolling stick line production process, including water cooling box and the cooling being set in water cooling box
Unit is respectively arranged with cabinet matched with cooling unit inlet opening and scupper on water cooling box, it is critical that described is cold
But unit includes one group of cooler set gradually along the feedstock direction of rolled piece, and cooler is solid by installation unit and water cooling box
Fixed connection, the cooler include shell, along rolled piece feedstock direction be set in turn in the intracorporal feed guide pipe of shell, in
Between guide pipe and discharging guide pipe, between discharging guide pipe and the feed guide pipe of the latter cooler of previous cooler
It is provided with gap, the intake antrum connecting by shell inlet opening with cabinet inlet opening is provided on the shell, it is described
The discharge end of feed guide pipe is located in intake antrum and is provided between intermediate guide pipe gap, the intake antrum end,
Trapezoidal structure, intermediate guide pipe are distinguished in the cross section of the inner cavity both ends of intermediate guide pipe and the inner cavity front end for the guide pipe that discharges
The bottom at inner cavity both ends connect respectively with the bottom of inner cavity front end at the upper bottom of intake antrum end, the guide pipe that discharges.
The outer wall of the intermediate guide pipe, the outer wall of discharging guide pipe are bonded with the inner wall of shell respectively, are set on shell
It is equipped with end cap matched with discharging guide pipe.
The installation unit includes the Fen Shuiliang connecting with water cooling box, pressing plate, divide on water beam along perpendicular to rolled piece into
The horizontally arranged of material direction has one group of retention bead matched with shell, and pressing plate is by connection bolt and water beam is divided to be connected
And hold-down bolt matched with shell is provided on pressing plate, divide the water hole being provided on water beam, the entrance of water hole, outlet
It is penetrated through respectively with cabinet inlet opening, shell inlet opening.
Described dividing is provided with the through-hole parallel with the setting direction of retention bead in the middle part of water beam.
It is provided in the water hole into water cable manifiold, separated time tube end of intaking, which is provided with to be located at, to be divided outside water beam
Turning handle, turning handle and divides between water beam and is provided with rotating seal ring, and the bracket of one group of water inlet cable manifiold, institute are provided in water hole
State water inlet cable manifiold front end and water hole entrance connect, intake cable manifiold on along its circumferencial direction successively offer with
The matched single-pass mouth in the outlet of water hole and multiport.
The outer wall of the discharge end of the feed guide pipe is tapered.
The length ratio of the cooler and water cooling box is 1:(7-10).
The shunting convex block of one group of circular array arrangement is provided on the outer wall of the feed guide pipe.
The beneficial effects of the present invention are: multiple coolers are arranged along the feedstock direction of rolled piece in water cooling box, identical cold
But in the case where length, the quantity of cooler is increased, greatly reduces the length of cooler, water spray number increases, significantly
The pressure for reducing required cooling water improves the direct contacting efficiency of cooling water and rolled piece, shortens intermediate guide pipe and goes out
The total length for expecting guide pipe, reduces the formation of air film, and solid line cooling water and rolled piece come into full contact with the efficient heat of progress and hand over
It changes, by the efficient type of cooling, has prevented the generation of martensite in rolled piece, ferrite grain size reaches 10 grades or more,
Metallographic structure is ferrite+pearlite (50%), and the intensity and toughness of rolled piece increase substantially, before guaranteeing product quality
The content that vanadium or niobium in rolled piece can be greatly reduced is put, production cost is reduced；
The inner cavity front end of intake antrum end, the inner cavity both ends of intermediate guide pipe and the guide pipe that discharges is respectively set to cross
The trapezoidal structure in section, rolled piece by feed guide pipe, enter intermediate guide pipe by intake antrum end when, in intake antrum
Water generate extruding, increase the ability that rolled piece carries water, the water in intake antrum bring to the front convenient for rolled piece, for intermediate guiding
Pipe, discharging guide pipe provide cooling water；The inner cavity both ends of intermediate guide pipe, the inner cavity front end of discharging guide pipe are set as transversal
The trapezoidal structure in face convenient for the output and input of rolled piece, while entering intermediate guiding tube cavity, discharging guiding for cooling water
Convenience is provided in tube cavity.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the assembling schematic diagram of installation unit and cooler；
Fig. 3 be divide in Fig. 2 the A-A of water beam to cross-sectional view；
Fig. 4 is the axonometric drawing into water cable manifiold；
Fig. 5 is the axonometric drawing of cooler；
Fig. 6 is the cross-sectional view of the B-B direction of Fig. 5；
Fig. 7 be feed guide pipe in Fig. 6 C-C to cross-sectional view；
Fig. 8 is the structural schematic diagram of water cooling box；
Fig. 9 is the intermediate structure figure using the reinforcing bar of old cooling device under 500 times；
Figure 10 is the intermediate structure figure using the reinforcing bar of cooling device of the invention under 500 times；
In attached drawing, 1, water cooling box, 2, cabinet inlet opening, 3, scupper, 4, cooler, 5, installation unit, 6, shell, 7,
Feed guide pipe, 8, intermediate guide pipe, 9, discharging guide pipe, 10, shell inlet opening, 11, intake antrum, 12, discharge end, 13, mistake
Water hole, 14, end cap, 15, Fen Shuiliang, 16, pressing plate, 17, retention bead, 18, connection bolt, 19, hold-down bolt, 20, through-hole,
21, water inlet cable manifiold, 22, turning handle, 23, bracket, 24, shunting convex block, 25, single-pass mouth, 26, multiport.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the invention will be further described.
Specific embodiment, as Figure 1-10 shows, the controlled cooling device in a kind of steel rolling stick line production process, including water cooling
Case 1 and the cooling unit being set in water cooling box 1, the both ends of water cooling box 1 offer the hole that penetrates of rolled piece, divide on water cooling box 1
It is not provided with cabinet matched with cooling unit inlet opening 2 and scupper 3, it is important to, the cooling unit includes one group of edge
The cooler 4 that the feedstock direction of rolled piece is set gradually, i.e. a rolled piece pass through water cooling box 1 and need by multiple coolers 4, cold
But device 4 is fixedly connected by installation unit 5 with water cooling box 1, can be transversely (perpendicular to rolled piece feedstock direction on installation unit 5
Horizontal direction) the multiple installation sites of setting, then water cooling box 1 can simultaneously cool down multiple rolled pieces, and the cooler 4 wraps
It includes shell 6, be set in turn in feed guide pipe 7 in shell 6, intermediate guide pipe 8 and discharging guiding along the feedstock direction of rolled piece
Pipe 9, as feed guide pipe 7, intermediate guide pipe 8, discharging guide pipe 9 are set gradually from left to right in Fig. 1, previous cold
But gap is provided between the discharging guide pipe 9 of device 4 and the feed guide pipe 7 of the latter cooler 4, on the shell 6
It is provided with the intake antrum 11 connecting by shell inlet opening 10 with cabinet inlet opening 2, the discharge end of the feed guide pipe 7
12 are located in intake antrum 11 and are provided between intermediate guide pipe 8 gap, 11 end of intake antrum, intermediate guide pipe 8
Inner cavity both ends and the cross section of inner cavity front end of the guide pipe 9 that discharges distinguish trapezoidal structure, the inner cavity two of intermediate guide pipe 8
The bottom at end is connect with the bottom at the upper bottom of 11 end of intake antrum, the inner cavity front end for the guide pipe 9 that discharges respectively, in trapezium structure
In, a longer bottom edge is bottom, and bottom is called on a shorter bottom edge, therefore the end of the trapezium structure of intake antrum 11 is (right
End) in, bottom is at left, upper bottom on the right side；In the left end of the trapezium structure of intermediate guide pipe 8, bottom is at left, upper bottom on the right side；It is intermediate
In the right end of the trapezium structure of guide pipe 8, upper bottom is in left, bottom on the right side；It discharges in the front end (left end) of guide pipe 9, bottom exists
Left, upper bottom is on the right side；The left end of intermediate guide pipe 8 is bonded with the end of intake antrum 11, and the right end of intermediate guide pipe 8 is led with discharging
It is bonded to the front end of pipe 9；The front end (left end) of intake antrum 11 is annular chamber, and inlet opening 10 is arranged at annular chamber.
Wherein, it is provided with the shunting convex block 24 of one group of circular array arrangement on the outer wall of feed guide pipe 7, shunts convex
Block 24 is located in the end of the trapezoidal structure of intake antrum 11, shunts to the cooling water for entering intake antrum 11, makes water flow more
Add and walks.
The outer wall of the intermediate guide pipe 8, the outer wall of discharging guide pipe 9 are bonded with the inner wall of shell 6 respectively, are formed
Mandrel matched form is provided with end cap 14 matched with discharging guide pipe 9, the wall shape of the end of intake antrum 11 on shell 6
At the limit of the left end to intermediate guide pipe 8, the right ends of 14 pairs of discharging guide pipes 9 of end cap is limited, and end cap 14 is by solid
Determine bolt to be fixedly connected with shell 6, be replaced convenient for the dismounting to intermediate guide pipe 8, the guide pipe 9 that discharges.Feed guide pipe 7
Front end is provided with stair-stepping side wall, the front end of the shell 6 and stair-stepping side wall of feed guide pipe 7 is mating is limited,
Feed guide pipe 7 is fixedly connected by fixing bolt with shell 6.The head of end cap 14 and the fixing bolt for fixing end cap 14
Portion, fixed feed guide pipe 7 fixing bolt head be in contact the discharging guide pipe 9 to be formed between adjacent two cooler 4,
Gap between feed guide pipe 8, the especially contact on fixing bolt head penetrate through gap and water cooling box 1, and rolled piece is by upper
One cooler 4 has the stroke of of short duration no-cooling-water when entering next cooler 4.All parts are equal in the cooler 4
It can be replaced in time according to actual use situation, facilitate long-time service, reduce maintenance cost.
The outer wall of the discharge end 12 of the feed guide pipe 7 is tapered, the discharge end 12 of taper and the cross of intake antrum 11
Section is parallel between trapezoidal space from end setting and side wall, and spacing between the two increases the turbulent flow into water, further
Improve the contacting efficiency of cooling water and rolled piece.
Cooler 4 (head of the fixing bolt including both ends) and 1 length ratio of water cooling box in the range of 1:7-1:10 and
Denominator is integer, and preferred length ratio is 1:9, i.e. a rolled piece is needed by nine coolers 4, in identical cooling length
In the case of, the quantity of cooler is increased, the length of cooler is greatly reduced, water spray number increases, and significantly reduces institute
The pressure for needing cooling water improves the direct contacting efficiency of cooling water and rolled piece.The multiple spot that rolled piece receives multiple coolers 4 adds
Water cooling is pressed, makes the stable water pressure in cooler 4, sufficiently contacts and cooled down with rolled piece, and in the shorter cooler 4 of length
Pressure (hydraulic) water can be sufficient filling between rolled piece and the inner wall of cooler 4, play the role of lubrication, reduce rolled piece transmission process
The abrasion of middle 4 inner wall of cooler.
Installation unit 5 include connect with water cooling box 1 divide water beam 15, pressing plate 16, divide on water beam 15 along perpendicular to rolled piece
The horizontally arranged of feedstock direction has one group of retention bead 17 matched with shell 6, between two adjacent retention beads 17
The card slot to 6 clamping of shell is formed, 4 retention beads 17 are set in the present embodiment altogether, is i.e. can laterally be pacified on a point of water beam 15
Fill three coolers 4, by dividing water beam 15 to be positioned, installed between cooler 4, pressing plate 16 by connection bolt 18 with point
Water beam 15 is connected and is provided with hold-down bolt 19 matched with shell 6 on pressing plate 16, when cooler 4 is installed, by cooler 4 according to
Secondary to be placed in the card slot formed between retention bead 17, setting connection bolt 18 in 16 two sides of pressing plate divides on water beam 15 and is provided with
With connect the matched fixed plate of bolt 18, connection bolt 18 is rotated into that fixed plate makes pressing plate 16 and to divide water beam 15 to be formed solid
It is fixed, it is further continued for the position of adjustment hold-down bolt 19 vertically, hold-down bolt 19 and the mating formation of card slot is made to exist cooler 4
Clamping on vertical, it is convenient for disassembly and assembly to complete the fixation of cooler 4, divide on water beam 15 be provided with respectively with cabinet inlet opening
2, the water hole 13 that shell inlet opening 10 penetrates through, shell inlet opening 10 is connect by water hole 13 with cabinet inlet opening 2.Cross water
The entrance in hole 13, outlet are penetrated through with cabinet inlet opening 2, shell inlet opening 10 respectively.
Wherein, the middle part of water beam 15 is divided to be provided with the through-hole 20 parallel with the setting direction of retention bead 17, the through-hole 20
Setting increase effectively a point heat dissipation area for water beam 15, avoid the thermal accumlation inside point water beam 15 and cooler 4.
It is provided in the water hole 13 into water cable manifiold 21,21 end of cable manifiold that intakes, which is provided with to be located at, divides water beam
Turning handle 22 outside 15, turning handle 22 and divides between water beam 15 and is provided with rotating seal ring, can be realized and turns into water cable manifiold 21
It is dynamic, and can prevent water from flowing out；The bracket 23 of one group of water inlet cable manifiold 21, the water inlet cable manifiold are provided in water hole 13
21 front end is connect with the entrance of water hole 13, is successively offered and water hole 13 on cable manifiold 21 of intaking along its circumferencial direction
The matched single-pass mouth 25 in outlet and multiport 26, by dividing on water beam 15 setting in this present embodiment, there are three cooler 4, institutes
To be respectively arranged with single-pass mouth on cable manifiold 21 of intaking, (two ports in bilateral mouth are set bilateral mouth along water inlet cable manifiold 21
Set) and three ports (three ports in three ports are arranged along the axis of water inlet cable manifiold 21)；(divide when carrying out single line water flowing
Only one cooler 4 works on water beam 15) when, Rotatable water inlet cable manifiold 21 makes single-pass mouth thereon and vertical position where it
The outlet for setting corresponding water hole 13 is corresponding, and it is side wall into water cable manifiold 21 that other two outlets of water hole 13 are corresponding；
When carrying out two-wire water flowing (cooler 4 works there are two dividing on water beam 15), Rotatable water inlet cable manifiold 21 makes bilateral thereon
The outlet of mouth water hole 13 corresponding with respective place vertical position is corresponding；It carries out all fronts water flowing and (divides three coolings on water beam 15
The all work of device 4) when, Rotatable water inlet cable manifiold 21 makes three ports water hole 13 corresponding with respective place vertical position respectively
Outlet it is corresponding, then the cooling water in water hole 13 can supply water to three coolers 4；The setting of water inlet cable manifiold 21, makes this hair
Bright controlled cooling device realizes multi-thread controllable operating, it is cooling can to carry out single line, and can carry out multi-thread cooling, and structure letter
It is single, it is easy to adjust.
When work, cooling water is supplied water from external supply equipment into water cooling box 1, and cooling water enters along cabinet inlet opening 2
Divide the water hole on water beam 15, then successively supplied water from water hole to three transversely arranged coolers 4, cooling water is by mistake
Shell inlet opening 10 is passed through in water hole, enters in intake antrum 11 immediately；Rolled piece penetrates cooling by the hole that penetrates of the left end of water cooling box 1
It in device 4, first passes around in the feed guide pipe 7 in cooler 4, the cross section of the front end of the inner cavity of feed guide pipe 7 is trapezoidal
Structure enters the inner cavity of feed guide pipe 7 convenient for rolled piece, then successively leads by intake antrum 11, intermediate guide pipe 8, discharging
To pipe 9, the cooling water in intake antrum 11 is brought into intermediate guide pipe 8, in the guide pipe 9 that discharges；By the first point of water beam in left side
After cooler 4 on 15 comes out, enter in the cooler 4 on the second point of water beam 15 immediately, the feedstock direction along rolled piece according to
It is successively cooled down in the cooler 4 of secondary arrangement.Due between cooler 4 head of the fixing bolt of 14 installation of end cap with
The head of the fixing bolt of 7 installation of feed guide pipe contacts with each other, therefore causes the discharging guide pipe an of cooler 4
In the state of interval no-cooling-water between 9 and the feed guide pipe 7 of next cooler 4, rolled piece is run between cooler 4
When, air film can disappear, and multiple coolers 4 make air film repeat to disappear, and improve the heat exchanger effectiveness of cooling water and rolled piece.
Below the service condition cooling to the controlled cooling device for using old controlled cooling device cooling and of the invention in actual production into
Row comparative analysis.
This rolls four specifications altogetherReinforcing bar, steel grade number HRB400E are every
The content of vanadium is 0.025-0.035% in steel grade corresponding to old controlled cooling device in performance comparison, cold using control of the invention
The content of vanadium is 0.01-0.015% in the steel grade of system, and specific component list is as follows:
The corresponding steel grade chemical component of old controlled cooling device:
| C | Si | Mn | S | P | V |
| 0.22-0.25% | 0.65-0.75% | 1.4-1.5% | ≤0.045 | ≤0.045 | 0.025-0.035% |
The corresponding steel grade chemical component of controlled cooling device of the invention:
| C | Si | Mn | S | P | V |
| 0.22-0.25% | 0.65-0.75% | 1.4-1.5% | ≤0.045 | ≤0.045 | 0.01-0.015% |
Index comparison is following, and [statistical data is that November (old controlled cooling device) (control of the invention was cold with December, January and 2 months
Device) weighted average comparative situation]:
1, yield comparison
As it can be seen that using averagely daily output improves 561t after controlled cooling device of the invention；
2, yield and operating rate comparison when machine
Using yield averagely improves 18.48t/h when machine after controlled cooling device of the invention, calendar operating rate is averagely improved
14.51%；
3, performance comparison
Average behavior when using old controlled cooling device:
Average behavior when using controlled cooling device of the invention:
Although reducing the content of vanadium in rolled piece, can be accorded with using controlled cooling device performance after cooling of the invention
GB1499.2-2018 standard requirements are closed, uniformity is preferable；Later period, we using old controlled cooling device were 0.01- to the content of vanadium
0.015% steel grade is cooled down, and finally show that the yield strength of each diameter is below 400MPa, and metallographic structure is unqualified.
4, rolled piece curvature compares
Use four specifications of old controlled cooling deviceReinforcing bar has different degrees of wave
Wave bending, and single meter of curvature is 0.4-0.6%, has been more than " the curvature Ying Buying of straight steel bar specified in GB1499.2
It rings and uses, total curvature is not more than the 0.4% " of reinforcing bar total length, it is therefore desirable to which the later period is aligned, and cost input is increased；
It being substantially eliminated using wave bending after controlled cooling device of the invention, straightness has larger change than before, through measuring, reinforcing bar list
Rice curvature is lower than 0.3%, and finished product curvature is good and aligns without the later period.
5, steel rear molding nose compares
Use four specifications of old controlled cooling deviceThe bending length end to end of reinforcing bar exists
600mm or so；After controlled cooling device of the invention, every steel are for the elimination of the bending bifurcation of ruler front and rear molding, steel
Bending length is less than 200mm to muscle end to end, and skirtboard pricks steel, random steel phenomenon substantially eliminates；Flush effect is preferable at elevating alignment roll table, changes
The phenomenon that difference that the cause being apt to is flush influences rhythm of production provides good condition for the collection of back zone steel.
6, it is compared in terms of grain size and metallographic structure
To the crystal grain of reinforcing bar after new nation's standard of implementation hot-rolled ribbed steel bars for ther reinforcement of concrete GB1499.2-2018
Degree and metallographic structure, which propose, to be distinctly claimed: hot-rolled reinforced bar grain size is that there can be no return on 9 grades or more and metallographic structure basic circle
Fiery martensitic structure.
Poor using old controlled cooling device Vickers hardness, macroscopical metallographic and high power microstructure, grain size situation (control cold temperature
Degree control is between 820-850 DEG C): Vickers hardness and grain size difference are exceeded.
Vickers hardness examining report
High power test report
Reinforcing bar intermediate structure is referring to Fig. 9；
It is good using Vickers hardness after controlled cooling device of the invention, macroscopical metallographic and high power microstructure, grain size situation
(controlling cold temperature control between 820-850 DEG C):
Vickers hardness examining report
High power test report
Reinforcing bar intermediate structure is referring to Figure 10；
After controlled cooling device of the invention, the stable life that bar HRB400/E Φ 18-25mm controls cold technique is realized
It produces, temperature on cooling table controls between 820-890 DEG C, and adjustment surplus is larger.The performance of steel product, strong flexor ratio, curvature and
The quality index such as metallographic structure meet GB1499.2-2018 standard requirements, and quality is more stable.
Benefit measuring and calculating:
1, energy-saving benefit
Controlling three, cold-zone domain pump motor is 315kw, wherein two frequency conversions (No. 6/7 water pump), power frequency (No. 8 water
Pump).
When using old controlled cooling device: when production, the unlatching of water pump adds the mode of a power frequency, No. 6/7 pump using a frequency conversion
It opens to 47 hertz, No. 8 pump inlet side valve openings degres are 100%, and outlet side valve openings degre is 55%.Hydraulic pressure control exists
1.45-1.75MPa flow is in 335m3/h。
After controlled cooling device of the invention: when production, the unlatching of water pump adds the mode of a power frequency using a frequency conversion, and 6/7
Number pump is opened to 40 hertz, and No. 8 pump inlet side valve openings degres are 100%, and outlet side valve openings degre is 30%.Hydraulic pressure control
In 0.55-1.05MPa, flow is in 210m3/h。
The reduction of pressure and flow substantially reduces power consumption, ton steel economize on electricity about 1.8Kwh/t, and year creation benefit=yield ×
Saving electricity × power consumption unit price=7.5 ten thousand tons × 12 × 1.8Kwh/t × 0.486 yuan/Kwh=78.73 ten thousand yuan.
2, yield increase effect
Daily about 561 tons of volume increase, calculates by 100 yuan/ton of ton material benefit.Year creation benefit=365 day × volume increase tonnage ×
Average calendar operating rate × ton material benefit=365 × 561 ton × 51% × 100 yuan/ton=1044.30 ten thousand yuan.
3, lumber recovery is improved benefit
The unqualified place in steel front at least needs shearing 3m when using old controlled cooling device, uses control cold charge of the invention
It postpones and completely eliminates this problem, thus much a lumber recovery rises 0.47%, and direct benefit is up to 4.3 yuan/ton.Year creates benefit
=7.5 ten thousand tons × 12 × direct economic benefit=7.5 ten thousand × 12 × 4.3 yuan/ton=3,870,000 yuan.
4, steel billet alloying component benefit
Controlled cooling device of the invention solve finished product wave is curved, performance inconsistency is big, metallographic structure is unstable, wear water adjustment
The big problem of difficulty, under the premise of guaranteeing quality, steel billet chemical component has carried out alloy optimization, reaches steel product performance
Mark:
Original steel billet chemical component:
| C | Si | Mn | S | P | V |
| 0.22-0.25% | 0.65-0.75% | 1.4-1.5% | ≤0.045 | ≤0.045 | 0.025-0.035% |
Steel billet chemical component after optimization:
| C | Si | Mn | S | P | V |
| 0.22-0.25% | 0.65-0.75% | 1.4-1.5% | ≤0.045 | ≤0.045 | 0.01-0.015% |
Advanced optimizing for steel billet chemical component can also be achieved using cooling device of the invention, vanadium or niobium is not added in realization
Equal noble metals, make steel product performance meet the requirement of new national standard GB/T1499.2-2018: the steel billet target advanced optimized
Chemical component are as follows:
| C | Si | Mn | S | P |
| 0.22-0.25% | 0.68-0.78% | 1.48-1.58% | ≤0.045 | ≤0.045 |
By the average value of in October, 2018 market price: V is every in steel reduces by 0.010%, and addition ferrovanadium nitride steel grade is raw
Producing cost reduces by 110 yuan/t.
The present inventor has found in actual production, in a unit heat-exchange system, when flow is relatively small
When, the change of flow is larger to cooling influential effect；It is right with the lasting increase of flow after flow increases to certain value
The influence of cooling effect is gradually reduced, and therefore, is cooled down in controlled cooling device of the invention using multi-cooler 4 step by step, is made cooling water
Required pressure substantially reduces, and the hydraulic pressure of about 0.35-6MP can meet the production needs of steel mill, wears needs by force relative to traditional
1.8MP pressure compare, ton steel can save 1 yuan of power consumption or so, in actual production, length 12-18m water cooling line cooling extent
Reach 400-600 DEG C (according to rolling specs, such as Φ 14, Φ 16, Φ 18, Φ 20, Φ 22, Φ 25, Φ 28 etc.), only high pressure
Pumping plant one, the electricity consumption saved can make steel rolling mill reduce cost every year up to up to ten million；In terms of properties of product, due to
The reduction of air film, the contact between cooling water and rolled piece is more abundant, increases boiling heat transfer coefficient, improves heat-transfer effect,
And then production efficiency is improved, by this efficient type of cooling, prevent the generation of martensite, has made the strong of rolled piece
Degree and toughness increase substantially, and further save production cost under the premise of guaranteeing quality.
Claims (8)
1. the controlled cooling device in a kind of steel rolling stick line production process including water cooling box (1) and is set to cold in water cooling box (1)
But unit is respectively arranged with cabinet matched with cooling unit inlet opening (2) and scupper (3) on water cooling box (1), and feature exists
In: the cooling unit includes one group of cooler (4) set gradually along the feedstock direction of rolled piece, and cooler (4) is by peace
Dress unit (5) be fixedly connected with water cooling box (1), the cooler (4) include shell (6), along rolled piece feedstock direction successively
Feed guide pipe (7), intermediate guide pipe (8) and discharging guide pipe (9) being set in shell (6), previous cooler (4)
It is provided with gap between discharging guide pipe (9) and the feed guide pipe (7) of the latter cooler (4), the shell is set on (6)
It is equipped with the intake antrum (11) connecting by shell inlet opening (10) with cabinet inlet opening (2), the feed guide pipe (7) goes out
It is interior and gap is provided between intermediate guide pipe (8) that material end (12) is located at intake antrum (11), the intake antrum (11) end,
Trapezoidal structure is distinguished in the cross section of the inner cavity front end at the inner cavity both ends and discharging guide pipe (9) of intermediate guide pipe (8), and centre is led
To the inner cavity both ends of pipe (8) bottom respectively with the upper bottom of intake antrum (11) end, discharge guide pipe (9) inner cavity front end under
Bottom connection.
2. the controlled cooling device in a kind of steel rolling Bar Wire Product production process according to claim 1, it is characterised in that: described
Intermediate guide pipe (8) outer wall, discharge guide pipe (9) outer wall be bonded respectively with the inner wall of shell (6), shell is set on (6)
It is equipped with the matched end cap (14) with discharging guide pipe (9).
3. the controlled cooling device in a kind of steel rolling reinforcing wire material production process according to claim 1, it is characterised in that: described
Installation unit (5) include the Fen Shuiliang (15) being connect with water cooling box (1), pressing plate (16), along perpendicular to rolling on Fen Shuiliang (15)
The horizontally arranged of the feedstock direction of part has one group and shell (6) matched retention bead (17), and pressing plate (16) is by connection
Bolt (18) and divide water beam (15) be connected and pressing plate (16) on be provided with shell (6) matched hold-down bolt (19), Fen Shuiliang
(15) water hole (13) being provided on, the entrance of water hole (13), outlet respectively with cabinet inlet opening (2), shell inlet opening
(10) it penetrates through.
4. the controlled cooling device in a kind of steel rolling Bar Wire Product production process according to claim 3, it is characterised in that: described
Fen Shuiliang (15) in the middle part of be provided with the through-hole (20) parallel with the setting direction of retention bead (17).
5. the controlled cooling device in a kind of steel rolling Bar Wire Product production process according to claim 3, it is characterised in that: described
Water hole (13) in be provided with into water cable manifiold (21), cable manifiold (21) end that intakes, which is provided with to be located at, divides water beam (15) external
Turning handle (22), turning handle (22) and divide between water beam (15) and be provided with rotating seal ring, be provided in water hole (13) one group into
The front end of the bracket (23) of moisture spool (21), the water inlet cable manifiold (21) is connect with the entrance of water hole (13), water inlet
Single-pass mouth (25) matched with the outlet of water hole (13) and multiport are successively offered along its circumferencial direction on cable manifiold (21)
(26)。
6. the controlled cooling device in a kind of steel rolling Bar Wire Product production process according to claim 1, it is characterised in that: described
Feed guide pipe (7) discharge end (12) outer wall it is tapered.
7. the controlled cooling device in a kind of steel rolling Bar Wire Product production process according to claim 1, it is characterised in that: described
Cooler (4) and water cooling box (1) length ratio be 1:(7-10).
8. the controlled cooling device in a kind of steel rolling Bar Wire Product production process according to claim 1, it is characterised in that: described
Feed guide pipe (7) outer wall on be provided with one group of circular array arrangement shunting convex block (24).
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| CN201910422465.9A CN110142303A (en) | 2019-05-21 | 2019-05-21 | A kind of controlled cooling device in steel rolling Bar Wire Product production process |
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| CN201910422465.9A CN110142303A (en) | 2019-05-21 | 2019-05-21 | A kind of controlled cooling device in steel rolling Bar Wire Product production process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074116A (en) * | 2020-08-13 | 2022-02-22 | 北京京诚瑞信长材工程技术有限公司 | Hot rolling reinforcing bar rod accuse rolling accuse cold production line |
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| CN1718769A (en) * | 2005-07-07 | 2006-01-11 | 东北大学 | Ultrafast cooling device for wire and rod hot rolling production line |
| CN101869919A (en) * | 2009-04-27 | 2010-10-27 | 江苏东方成套设备制造有限公司 | Turbulent pipe for high-speed passing water cooler |
| CN204470299U (en) * | 2015-03-25 | 2015-07-15 | 福建三安钢铁有限公司 | A kind of cooling device increasing high-speed bar mill on-line cooling effect |
| CN210023271U (en) * | 2019-05-21 | 2020-02-07 | 邯郸市光华精密机械制造有限公司 | Controlled cooling device used in production process of steel rolling rod and wire |
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| CN1586755A (en) * | 2004-08-26 | 2005-03-02 | 康仁荣 | Hot rolling control cooler |
| CN1718769A (en) * | 2005-07-07 | 2006-01-11 | 东北大学 | Ultrafast cooling device for wire and rod hot rolling production line |
| CN101869919A (en) * | 2009-04-27 | 2010-10-27 | 江苏东方成套设备制造有限公司 | Turbulent pipe for high-speed passing water cooler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114074116A (en) * | 2020-08-13 | 2022-02-22 | 北京京诚瑞信长材工程技术有限公司 | Hot rolling reinforcing bar rod accuse rolling accuse cold production line |
| CN114074116B (en) * | 2020-08-13 | 2024-03-19 | 北京京诚瑞信长材工程技术有限公司 | Rolling and cooling control production line for hot rolled steel bar |
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