CN117483425A - Production equipment suitable for zinc-aluminum-magnesium hot rolled material - Google Patents
Production equipment suitable for zinc-aluminum-magnesium hot rolled material Download PDFInfo
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- CN117483425A CN117483425A CN202311363497.9A CN202311363497A CN117483425A CN 117483425 A CN117483425 A CN 117483425A CN 202311363497 A CN202311363497 A CN 202311363497A CN 117483425 A CN117483425 A CN 117483425A
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- roll mill
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- flat roll
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 title claims abstract description 26
- -1 zinc-aluminum-magnesium Chemical compound 0.000 title claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims abstract description 59
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000005098 hot rolling Methods 0.000 description 6
- 230000002441 reversible effect Effects 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 229910018134 Al-Mg Inorganic materials 0.000 description 2
- 229910018467 Al—Mg Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
Abstract
The invention relates to production equipment suitable for zinc-aluminum-magnesium hot rolled materials, which comprises a heating furnace, a high-pressure water descaling device, a roughing mill set, a finishing mill set, a laminar flow cooler and a coiling machine which are sequentially arranged along the advancing direction of a plate blank, wherein the roughing mill set comprises an E1 vertical roll mill, an R1 horizontal roll mill, an R2 horizontal roll mill, an E2 vertical roll mill, an R3 horizontal roll mill, an R4 horizontal roll mill, an E3 vertical roll mill and an R5 horizontal roll mill which are sequentially arranged; the finishing rolling unit comprises an E4 vertical roll mill, an F1 flat roll mill, an F2 flat roll mill, an F3 flat roll mill, an F4 flat roll mill, an F5 flat roll mill, an F6 flat roll mill, an F7 flat roll mill, an F8 flat roll mill and an F9 flat roll mill which are sequentially arranged. The rough rolling machine set realizes one-time forming of the hot rolled plate blank through three-vertical five-flat rough rolling, multi-frame double-roller rolling is beneficial to controlling the rough rolling width precision, has high production efficiency, reduces the influence of temperature drop on rolling production, reduces the output of secondary oxidized iron scales, and is suitable for producing thick zinc-aluminum-magnesium hot rolled materials.
Description
Technical Field
The invention belongs to the technical field of slab hot rolling, and particularly relates to production equipment suitable for zinc-aluminum-magnesium hot rolled materials.
Background
The heat-based zinc aluminum magnesium is used as a new material of the three-element coating, and is rapidly accepted by users in the market due to the advantage of excellent corrosion resistance. The heat-base zinc aluminum magnesium has higher surface quality requirement on the heat-pricked base material than other heat-base coated plates.
The zinc aluminum magnesium hot rolled material is generally produced by adopting a traditional hot rolling process, as shown in fig. 1, wherein the conventional hot rolling production line process comprises the following steps: slab heating, high-pressure water dephosphorization, reversible one-to-one flat double-frame rough rolling, hot rolling box, hub shearing, 7-frame finishing mill group, laminar cooling and coiling. However, when the heat-base zinc-aluminum-magnesium base material with the thickness of more than 5.0mm is produced, the heat-base zinc-aluminum-magnesium base material produced by the process has the problems of poor surface quality, high process production cost, large board convexity deviation and the like.
Disclosure of Invention
The invention aims to provide production equipment suitable for zinc-aluminum-magnesium hot rolled materials, which can shorten the rolling time, reduce the output of secondary oxide scales and has high surface quality;
in order to achieve the above purpose, the invention adopts the following technical scheme:
a production device suitable for zinc-aluminum-magnesium hot rolled materials comprises a heating furnace, a high-pressure water descaling device, a roughing mill set, a fine rolling mill set, a laminar flow cooler and a coiling machine which are sequentially arranged along the advancing direction of a plate blank,
the roughing mill set comprises an E1 vertical roll mill, an R1 flat roll mill, an R2 flat roll mill, an E2 vertical roll mill, an R3 flat roll mill, an R4 flat roll mill, an E3 vertical roll mill and an R5 flat roll mill which are sequentially arranged, wherein the R1 flat roll mill, the R2 flat roll mill, the R3 flat roll mill, the R4 flat roll mill and the R5 flat roll mill are double-roll mills,
the finishing rolling unit comprises an E4 vertical roll mill, a F1 flat roll mill, a F2 flat roll mill, a F3 flat roll mill, a F4 flat roll mill, a F5 flat roll mill, a F6 flat roll mill, a F7 flat roll mill, a F8 flat roll mill and a F9 flat roll mill which are sequentially arranged, wherein the F1 flat roll mill, the F2 flat roll mill, the F3 flat roll mill, the F4 flat roll mill, the F5 flat roll mill, the F6 flat roll mill, the F7 flat roll mill, the F8 flat roll mill and the F9 flat roll mill are four-roll mills.
Preferably, the working roll diameters of the R1 flat-roll mill, the R2 flat-roll mill, the R3 flat-roll mill, the R4 flat-roll mill and the R5 flat-roll mill are 720-780mm; working roll diameters of the E1 vertical roll mill and the E2 vertical roll mill are 600-650mm; the working roll diameter of the E3 vertical roll mill is 550-600mm.
Preferably, the roughing mill sets rolls the slab to a thickness of 28-35 mm, and the temperature of the slab is controlled to be 1000+/-30 ℃ after the slab leaves the R5 flat-roller mill.
Preferably, the diameters of the support rolls of the F1 flat-roll mill, the F2 flat-roll mill, the F3 flat-roll mill, the F4 flat-roll mill, the F5 flat-roll mill, the F6 flat-roll mill, the F7 flat-roll mill, the F8 flat-roll mill and the F9 flat-roll mill are 720-790mm; working roll diameters of the F1 flat-roll mill, the F2 flat-roll mill, the F3 flat-roll mill and the F4 flat-roll mill are 400-440mm; working roll diameters of the F5 flat-roll mill, the F6 flat-roll mill, the F7 flat-roll mill, the F8 flat-roll mill and the F9 flat-roll mill are 360-400mm; the diameter of the E4 vertical roller mill is 550-600mm.
Preferably, the threading speed of the finishing mill group is 8M/s, the temperature of the plate blank leaving the F9 flat-roller mill is controlled at 850 ℃, and the speed of the plate blank leaving the F9 flat-roller mill is 16M/s at maximum.
Preferably, an inlet hub shear is arranged between the rough rolling unit and the fine rolling unit.
The rough rolling machine set realizes one-time forming of the hot rolled plate blank through three-vertical five-flat rough rolling, multi-frame double-roller rolling is beneficial to controlling the rough rolling width precision, the production efficiency is high, the influence of temperature drop on rolling production is reduced, the output of secondary oxide scales is reduced, the rough rolling machine set is suitable for producing thick-specification zinc-aluminum-magnesium hot rolled materials, and the economical efficiency is superior to that of reversible rolling and four-roller rolling;
according to the fine rolling machine set, through adopting one-stand nine-flat continuous rolling, the finish rolling time is shortened, the contact time between the fine rolling machine set and air before crimping is shortened, the generation of iron scales is reduced, the control of convexity and plate shape of a plate is facilitated, and the iron scales of the plate are few;
the invention adopts a one-step forming process method, effectively improves the rolling level, shortens the production time of the hot rolled single coil and reduces the energy consumption;
in the invention, the rough rolling adopts double-roller irreversible rolling, a hot coil box is not arranged, the single working procedure cost of the zinc-aluminum-magnesium hot rolled base stock is low, and the operation and maintenance of equipment are reduced.
Drawings
FIG. 1 is a process flow diagram of a conventional hot rolling line;
FIG. 2 is a flow chart of the production facility of the present invention.
FIG. 3 is a photograph of the surface of a conventional Zn-Al-Mg hot rolled material;
FIG. 4 is a photograph showing the surface of a hot rolled Zn-Al-Mg material produced by the production facility of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and specific examples.
As shown in figure 2, the production equipment suitable for the zinc-aluminum-magnesium hot rolled material comprises a heating furnace, a high-pressure water descaling device, a roughing mill set, a finishing mill set, a laminar flow cooler and a coiling machine which are sequentially arranged along the advancing direction of a plate blank,
the heating furnace is used for heating the slab to about 1250 ℃, and the heated slab is conveyed onto a discharging roller way from the end of the heating furnace by a tapping machine through a furnace roller way; the high-pressure water descaling device is used for removing oxide skin on the surface of the slab;
the roughing mill unit comprises an E1 vertical roll mill, an R1 horizontal roll mill, an R2 horizontal roll mill, an E2 vertical roll mill, an R3 horizontal roll mill, an R4 horizontal roll mill, an E3 vertical roll mill and an R5 horizontal roll mill which are sequentially arranged, wherein the R1 horizontal roll mill, the R2 horizontal roll mill, the R3 horizontal roll mill, the R4 horizontal roll mill and the R5 horizontal roll mill are double-roll mills and are used for rolling blank surfaces of slabs, the E1 vertical roll mill, the E2 vertical roll mill and the E3 vertical roll mill are used for rolling side edges of the slabs so as to ensure that the widths of the slabs are uniform, and the roughing mill unit rolls the slabs to the thickness of 28-35 mm; the final rolling temperature of the slab is controlled at 1000+/-30 ℃, one-time forming of the hot rolled slab is realized through three-stand five-flat rough rolling, multi-frame double-roller rolling is facilitated, the precision control of rough rolling width is facilitated, the production efficiency is high, the influence of temperature drop on rolling production is reduced, the output of secondary oxide scales is reduced, the hot rolling process is suitable for producing thick-specification zinc-aluminum-magnesium hot rolled materials, and the economy is superior to reversible rolling process and four-roller rolling;
the diameters of working rolls of the R1 flat rolling mill, the R2 flat rolling mill, the R3 flat rolling mill, the R4 flat rolling mill and the R5 flat rolling mill are 720-780mm, and the contact area between the large roll diameter and a rolled piece is large by adopting the large roll diameter, so that the rolling force is large; working roll diameters of the E1 vertical roll mill and the E2 vertical roll mill are 600-650mm; the diameter of a working roll of the E3 vertical roller mill is 550-600mm;
the finishing rolling unit comprises an E4 vertical roll mill, an F1 horizontal roll mill, an F2 horizontal roll mill, an F3 horizontal roll mill, an F4 horizontal roll mill, an F5 horizontal roll mill, an F6 horizontal roll mill, an F7 horizontal roll mill, an F8 horizontal roll mill and an F9 horizontal roll mill which are sequentially arranged, wherein the F1 horizontal roll mill, the F2 horizontal roll mill, the F3 horizontal roll mill, the F4 horizontal roll mill, the F5 horizontal roll mill, the F6 horizontal roll mill, the F7 horizontal roll mill, the F8 horizontal roll mill and the F9 horizontal roll mill are four-roll mills, a hydraulic looper can be arranged between the finishing rolling units, constant micro tension rolling is ensured on a plate blank, rolling precision is ensured, the final rolling temperature of the plate blank is controlled at 850 ℃, the final rolling speed of the plate blank is 16M/s at the maximum, the finishing rolling unit adopts high rolling speed, the threading speed is 8M/s, rolling time is shortened by adopting one-nine flat continuous rolling mill, contact time with air is shortened, generation of oxidized plates is facilitated to be reduced, control of convexity and oxidized plates are reduced, and iron sheets are oxidized less;
the diameters of the supporting rollers of the F1 flat roller mill, the F2 flat roller mill, the F3 flat roller mill, the F4 flat roller mill, the F5 flat roller mill, the F6 flat roller mill, the F7 flat roller mill, the F8 flat roller mill and the F9 flat roller mill are 720-790mm; working roll diameters of the F1 flat-roll mill, the F2 flat-roll mill, the F3 flat-roll mill and the F4 flat-roll mill are 400-440mm; working roll diameters of the F5 flat-roll mill, the F6 flat-roll mill, the F7 flat-roll mill, the F8 flat-roll mill and the F9 flat-roll mill are 360-400mm; the diameter of the E4 vertical roller mill is 550-600mm;
the laminar flow cooler cools the rolled plate and strip to achieve the process target temperature, and the temperature of the rolled plate is controlled to be 650+/-20 ℃ before coiling; the coiling machine coils the plate.
The invention adopts a one-step forming process method, effectively improves the rolling level, shortens the production time of the hot-rolled single coil (the rolling time of the conventional hot-rolled single coil is 300+/-25 seconds, and the rolling time of the hot-rolled single coil is 200+/-20 seconds, and is shortened by 30 percent), and has low energy consumption.
As shown in fig. 3 and 4, by comparing the surface photographs of the conventional zinc-aluminum-magnesium hot rolled material with the surface photographs of the zinc-aluminum-magnesium hot rolled material produced by the production equipment of the present invention, it was found that the surface scale of the zinc-aluminum-magnesium hot rolled material produced by the production equipment of the present invention is effectively reduced.
In this embodiment, an inlet hub shear is disposed between the roughing mill unit and the finishing mill unit, and the inlet hub shear is used for removing the head and tail of the slab rolled by the roughing mill unit, wherein the maximum shearing force of the inlet hub shear is 4000KN, and the maximum shearing thickness is 40mm.
Claims (6)
1. A production device suitable for zinc-aluminum-magnesium hot rolled materials is characterized by comprising a heating furnace, a high-pressure water descaling device, a roughing mill set, a finishing mill set, a laminar flow cooler and a coiling machine which are sequentially arranged along the advancing direction of a plate blank,
the roughing mill set comprises an E1 vertical roll mill, an R1 flat roll mill, an R2 flat roll mill, an E2 vertical roll mill, an R3 flat roll mill, an R4 flat roll mill, an E3 vertical roll mill and an R5 flat roll mill which are sequentially arranged, wherein the R1 flat roll mill, the R2 flat roll mill, the R3 flat roll mill, the R4 flat roll mill and the R5 flat roll mill are double-roll mills,
the finishing rolling unit comprises an E4 vertical roll mill, a F1 flat roll mill, a F2 flat roll mill, a F3 flat roll mill, a F4 flat roll mill, a F5 flat roll mill, a F6 flat roll mill, a F7 flat roll mill, a F8 flat roll mill and a F9 flat roll mill which are sequentially arranged, wherein the F1 flat roll mill, the F2 flat roll mill, the F3 flat roll mill, the F4 flat roll mill, the F5 flat roll mill, the F6 flat roll mill, the F7 flat roll mill, the F8 flat roll mill and the F9 flat roll mill are four-roll mills.
2. The production apparatus for zinc-aluminum-magnesium hot rolled material according to claim 1, wherein the working roll diameters of the R1 flat roll mill, the R2 flat roll mill, the R3 flat roll mill, the R4 flat roll mill and the R5 flat roll mill are 720-780mm; working roll diameters of the E1 vertical roll mill and the E2 vertical roll mill are 600-650mm; the working roll diameter of the E3 vertical roll mill is 550-600mm.
3. The production equipment for zinc-aluminum-magnesium hot rolled material according to claim 1, wherein the roughing mill unit rolls the slab to a thickness of 28-35 mm, and the temperature of the slab is controlled to be 1000+/-30 ℃ after the slab leaves the R5 flat-rolling mill.
4. The production apparatus for zinc-aluminum-magnesium hot rolled material according to claim 1, wherein the backup roll diameter of the F1 flat roll mill, F2 flat roll mill, F3 flat roll mill, F4 flat roll mill, F5 flat roll mill, F6 flat roll mill, F7 flat roll mill, F8 flat roll mill, and F9 flat roll mill is 720-790mm; working roll diameters of the F1 flat-roll mill, the F2 flat-roll mill, the F3 flat-roll mill and the F4 flat-roll mill are 400-440mm; working roll diameters of the F5 flat-roll mill, the F6 flat-roll mill, the F7 flat-roll mill, the F8 flat-roll mill and the F9 flat-roll mill are 360-400mm; the diameter of the E4 vertical roller mill is 550-600mm.
5. The production apparatus for zinc-aluminum-magnesium hot rolled material according to claim 1, wherein the threading speed of the finishing mill group is 8M/s, the temperature of the slab leaving the F9 flat rolling mill is controlled at 850 ℃, and the speed of the slab leaving the F9 flat rolling mill is at most 16M/s.
6. The production equipment for zinc-aluminum-magnesium hot rolled materials according to claim 1, wherein an inlet rotary hub shear is arranged between the roughing mill unit and the finishing mill unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311363497.9A CN117483425A (en) | 2023-10-20 | 2023-10-20 | Production equipment suitable for zinc-aluminum-magnesium hot rolled material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311363497.9A CN117483425A (en) | 2023-10-20 | 2023-10-20 | Production equipment suitable for zinc-aluminum-magnesium hot rolled material |
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| Publication Number | Publication Date |
|---|---|
| CN117483425A true CN117483425A (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311363497.9A Pending CN117483425A (en) | 2023-10-20 | 2023-10-20 | Production equipment suitable for zinc-aluminum-magnesium hot rolled material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117483425A (en) |
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2023
- 2023-10-20 CN CN202311363497.9A patent/CN117483425A/en active Pending
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