CN107321790A - The acid washing method of low-carbon hot-rolling strip - Google Patents
The acid washing method of low-carbon hot-rolling strip Download PDFInfo
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- CN107321790A CN107321790A CN201710642783.7A CN201710642783A CN107321790A CN 107321790 A CN107321790 A CN 107321790A CN 201710642783 A CN201710642783 A CN 201710642783A CN 107321790 A CN107321790 A CN 107321790A
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- rolled strip
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 155
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000002253 acid Substances 0.000 title claims abstract description 26
- 238000005406 washing Methods 0.000 title claims abstract description 16
- 238000005098 hot rolling Methods 0.000 title abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 163
- 239000010959 steel Substances 0.000 claims abstract description 163
- 238000005554 pickling Methods 0.000 claims abstract description 41
- 238000003466 welding Methods 0.000 claims abstract description 21
- 230000008569 process Effects 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000010008 shearing Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 16
- 229910000677 High-carbon steel Inorganic materials 0.000 description 5
- 238000009749 continuous casting Methods 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 235000021110 pickles Nutrition 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- 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
- B21B45/0269—Cleaning
-
- 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
- B21B45/04—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 de-scaling, e.g. by brushing
- B21B45/06—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 de-scaling, e.g. by brushing of strip material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B2015/0064—Uncoiling the rolled product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention provides a kind of acid washing method of low-carbon hot-rolling strip, including：By coiled low-carbon hot-rolling strip uncoiling, low-carbon hot-rolling band steel plate is formed；Low-carbon hot-rolling band steel plate sequentially enters straightener and entrance is cut, and the low-carbon hot-rolling band steel plate after shearing is welded into bonding machine, and the low-carbon hot-rolling after welding is sequentially passed through after the first jockey pulley with steel plate, the first planisher and the second jockey pulley；Enter entry loop by the low-carbon hot-rolling band steel plate of the second jockey pulley, low-carbon hot-rolling band steel plate enters descaling mill by entry loop, and descaling mill carries out scale breading to surface of the low-carbon hot-rolling with steel plate；Low-carbon hot-rolling band steel plate after scale breading enters pickling machine and potcher carries out pickling-rinsing；Low-carbon hot-rolling strip after pickling-rinsing sequentially passes through dryer, the second planisher and the 3rd straightener, completes pickling.Using the present invention, the problems such as existing low-carbon hot-rolling belt steel surface cross break is with infringement of the wave type of low-carbon hot-rolling strip to pickling producing line is solved.
Description
Technical Field
The invention relates to the technical field of steel, in particular to an acid pickling method of low-carbon hot-rolled strip steel.
Background
In recent years, industrial development environment of China is changed deeply, deep contradiction accumulated for a long time is increasingly prominent, in terms of the steel industry, the excess capacity and the homogenization competition are serious, so that the market is seriously more supplied and demanded, meanwhile, global economy is reduced, the steel industry demand is further caused to be constant, the price is continuously low, meanwhile, the upstream iron ore industry is monopolized, the prices of labor force, land, fuel power and the like are continuously increased, the cost pressure of production elements is increased, the ecological environment constraint is intensified, the enterprise profit space is further compressed, and the steel industry is in a critical head of life and death.
With the continuous decline of the steel market, steel is always in a state of little profit or no profit, so that steel manufacturers are forced to discuss the way of reducing the cost, and the environmental protection is further enhanced and the environmental protection requirement is strict at present at home, so that the discussion of the steel production process which reduces the cost and is environmental protection becomes a necessary survival way.
The ESP is fully utilized to develop and apply new products, the national overall planning and industry planning are met, the relevant policy regulations of national transfer and innovation are met, the high-starting-point development targets of process modernization, equipment maximization, production intensification, resource and energy circulation, energy consumption minimization and economic benefit optimization can be met, and the ESP has very important significance for promoting energy conservation and emission reduction and technical progress of the steel industry and promoting enterprise transfer and upgrade, technological innovation and product structure adjustment.
In view of the limitation of the production specification of the traditional hot rolling and sheet continuous casting and rolling process represented by CSP, the 'hot cooling replacement' cannot be further developed, although ESP can produce thin-specification strip steel, because the specification is thinner, the subsequent acid pickling and leveling bring about the problem of surface transverse folding to generate defective products, the use of customers is seriously influenced, and meanwhile, the wave-shaped strip steel can cause damage to a production line, so the design of the production line for reducing or even eliminating the surface transverse folding of the strip steel and reducing the damage of the wave-shaped strip steel to the acid pickling production line becomes an important problem of 'hot cooling replacement'.
In order to solve the problems, the invention provides an acid pickling method of low-carbon hot-rolled strip steel.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method for pickling a low-carbon hot-rolled strip, so as to solve the problem that the conventional low-carbon hot-rolled strip is damaged by the wave shape of the low-carbon hot-rolled strip when the surface of the low-carbon hot-rolled strip is transversely folded.
The invention provides an acid washing method of low-carbon hot rolled strip steel, which comprises the following steps: uncoiling the coiled low-carbon hot-rolled strip steel to form a low-carbon hot-rolled strip steel plate;
the low-carbon hot-rolled strip steel plate sequentially enters a straightener and an inlet shear, wherein the inlet shear shears damaged parts of the head and the tail of the low-carbon hot-rolled strip steel plate straightened by the straightener;
the sheared low-carbon hot rolled strip steel plates enter a welding machine for welding, wherein the welding machine performs head-to-tail welding on the adjacent low-carbon hot rolled strip steel plates;
the welded low-carbon hot-rolled strip steel plate sequentially passes through a first tension roller, a first leveling machine and a second tension roller, wherein,
the diameters of the first tension roller and the second tension roller are 1250-1400 mm,
the first tension roller and the second tension roller are used for keeping the tension of the low-carbon hot rolled strip steel plate stable and the elongation rate consistent before and after the low-carbon hot rolled strip steel plate passes through the first leveling machine,
the first leveling machine is used for eliminating a yield platform generated in the pickling process of the low-carbon hot rolled strip steel plate;
the low-carbon hot rolled strip steel plate passing through the second tension roll enters the inlet loop, the low-carbon hot rolled strip steel plate enters the scale breaker through the inlet loop, and the scale breaker breaks scales on the surface of the low-carbon hot rolled strip steel plate;
the low-carbon hot rolled strip steel plate after being subjected to scale breaking enters an acid washing machine and a rinsing machine for acid washing and rinsing;
and (3) the acid-washed and rinsed low-carbon hot-rolled strip steel sequentially passes through a dryer, a second straightening machine and a third straightening machine to finish acid washing.
In addition, it is preferable that, in the process of uncoiling the coiled low-carbon hot-rolled strip steel to form a low-carbon hot-rolled strip steel sheet,
uncoiling coiled low-carbon hot-rolled strip steel by two uncoilers, and transmitting the uncoiled low-carbon hot-rolled strip steel plate to two straighteners; wherein,
the uncoiler comprises a first uncoiler and a second uncoiler, and the straightener comprises a first straightener and a second straightener.
In addition, the preferable scheme is that the coiled low-carbon hot-rolled strip steel enters a first straightener to be straightened after being uncoiled by a first uncoiler; and uncoiling the coiled low-carbon hot-rolled strip steel by a second uncoiler, and then, straightening by a second straightener.
In addition, it is preferable that the low-carbon hot-rolled strip steel plate straightened by the first straightener and the second straightener is fed into the entry shears.
In addition, it is preferable that the scale breaker is used for cracking and peeling off an iron scale on the surface of the low-carbon hot-rolled strip steel sheet.
In addition, it is preferable that the second leveler maintains the flatness of the low-carbon hot-rolled strip after acid pickling.
In addition, the thickness of the low-carbon hot-rolled strip steel is preferably 0.8-2.0 mm.
In addition, it is preferable that the damaged head and tail portions of the low-carbon hot-rolled strip steel plate straightened by the straightener are 5 to 6m in a process of shearing off the damaged head and tail portions by an entry shear.
According to the technical scheme, the acid washing method of the low-carbon hot rolled strip steel, provided by the invention, has the advantages that two tension rollers and the leveler are additionally arranged behind the welding machine in the acid washing process of the low-carbon hot rolled strip steel, and the leveler is positioned between the two tension rollers.
To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description and appended claims, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a schematic flow chart of an acid pickling method of a low-carbon hot-rolled strip steel according to an embodiment of the invention;
FIG. 2 is a block diagram of a pickling process of a low-carbon hot-rolled strip according to an embodiment of the invention.
The automatic straightening machine comprises a first uncoiler 1, a second uncoiler 2, a first straightener 3, a first straightener 4, a second straightener 5, an inlet shear 6, a welding machine 7, a first tension roller 8, a first straightener 9, a second tension roller 10, an inlet loop 11, a descaler 12, a pickling machine 13, a rinsing machine 14, a dryer 15, a second straightener 16, a third straightener 17 and an outlet loop.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
Aiming at the problems that the conventional low-carbon hot rolled strip steel surface is transversely folded to damage the pickling production line by the wave shape of the low-carbon hot rolled strip steel and the like, the invention provides the pickling method of the low-carbon hot rolled strip steel, two tension rollers and a leveler are added behind a welding machine, and the leveler is positioned between the two tension rollers; therefore, the invention not only meets the production technical requirements of the thin-specification strip steel, but also meets the requirements of clients on maximizing profits.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
To illustrate the present invention, fig. 1 is a method for pickling a low-carbon hot-rolled steel strip according to an embodiment of the present invention, and fig. 1 shows a flow of the method for pickling a low-carbon hot-rolled steel strip according to an embodiment of the present invention in fig. 1.
As shown in FIG. 1, the pickling method of the low-carbon hot-rolled strip steel provided by the invention comprises the following steps:
s110: uncoiling the coiled low-carbon hot-rolled strip steel to form a low-carbon hot-rolled strip steel plate;
s120: the low-carbon hot-rolled strip steel plate sequentially enters a straightener and an inlet shear, wherein the inlet shear shears damaged parts of the head and the tail of the low-carbon hot-rolled strip steel plate straightened by the straightener;
s130: the sheared low-carbon hot rolled strip steel plates enter a welding machine for welding, wherein the welding machine performs head-to-tail welding on the adjacent low-carbon hot rolled strip steel plates;
s140: the welded low-carbon hot-rolled strip steel plate sequentially passes through a first tension roller, a first leveling machine and a second tension roller, wherein,
the diameters of the first tension roller and the second tension roller are 1250-1400 mm,
the first tension roller and the second tension roller are used for keeping the tension of the low-carbon hot rolled strip steel plate stable and the elongation rate consistent before and after the low-carbon hot rolled strip steel plate passes through the first leveling machine,
the first leveling machine is used for eliminating a yield platform generated in the pickling process of the low-carbon hot rolled strip steel plate;
s150: the low-carbon hot rolled strip steel plate passing through the second tension roll enters the inlet loop, the low-carbon hot rolled strip steel plate enters the scale breaker through the inlet loop, and the scale breaker breaks scales on the surface of the low-carbon hot rolled strip steel plate;
s160: the low-carbon hot rolled strip steel plate after being subjected to scale breaking enters an acid washing machine and a rinsing machine for acid washing and rinsing;
s170: and (3) the acid-washed and rinsed low-carbon hot-rolled strip steel sequentially passes through a dryer, a second straightening machine and a third straightening machine to finish acid washing.
The specific pickling method flow of the low-carbon hot rolled strip steel is adopted, the surface of the strip steel is free of transverse folding when the low-carbon thin hot rolled strip steel is pickled, the requirement of customers on the surface quality of the low-carbon hot rolled strip steel is further met, and meanwhile, the damage of the wave type of the thin-specification low-carbon hot rolled strip steel to a production line can be reduced. The thickness of the low-carbon hot-rolled strip steel is 0.8-2.0 mm.
The pickling method of the low-carbon hot-rolled steel strip as described above can be described in more detail with reference to the embodiment of fig. 2. FIG. 2 is a block diagram of a pickling process of a low-carbon hot-rolled strip according to an embodiment of the invention.
Referring to fig. 1 and 2 together, the equipment through which the low-carbon hot-rolled strip steel of the present invention passes in the pickling process is shown in fig. 2. first, the coiled low-carbon hot-rolled strip steel passes through a first uncoiler 1 and a second uncoiler 2, respectively, the strip steel passing through the first uncoiler 1 enters a first straightener 3, and the strip steel passing through the second uncoiler 2 enters a second straightener 4.
That is, the coiled low-carbon hot-rolled strip steel is uncoiled through two uncoilers, and the uncoiled low-carbon hot-rolled strip steel plate is transmitted to two straighteners; wherein, the decoiler includes first decoiler 1 and second decoiler 2, and the straightener includes first straightener 3 and second straightener 4.
Uncoiling the coiled low-carbon hot-rolled strip steel by a first uncoiler 1, and then, straightening by a first straightener 3; and uncoiling the coiled low-carbon hot-rolled strip steel by the second uncoiler 2, and then, straightening by the second straightener 4.
As shown in fig. 2, the low-carbon hot-rolled strip steel enters the inlet 5 after being straightened by the first straightener 3 and the second straightener 4, and the damaged parts of the head and the tail of the strip steel are cut off by the inlet 5.
That is, the low-carbon hot-rolled strip steel straightened by the first leveler 3 and the second leveler 4 enters the entry shears 5. And in the process of shearing the damaged head and tail parts of the low-carbon hot-rolled strip steel plate straightened by the straightener by the entrance shears, the damaged head and tail parts are 5-6 m to ensure that the damaged parts are completely sheared.
In the embodiment shown in fig. 2, the sheared strip steel plate enters a welding machine 6, the welding machine 6 welds the head and the tail of the adjacent strip steel plates on the production line, so that the strip steel becomes a long whole body to realize no interruption in acid cleaning, and the welded strip steel sequentially enters a first tension roller 7, a first leveling machine 8 and a second tension roller 9.
The diameters of the first tension roll 7 and the second tension roll 9 are 1250-1400 mm, and are set to keep the tension of the low-carbon hot-rolled strip steel plate stable before and after passing through the first leveling machine 8, and meanwhile, the first tension roll 7 and the second tension roll 9 are also used for keeping the elongation of the low-carbon hot-rolled strip steel plate consistent before and after passing through the first leveling machine 8.
The first leveling machine 8 is used for eliminating a yield platform generated in the pickling process of the low-carbon hot rolled strip steel plate. In the embodiment of the invention, the dislocation of the low-carbon steel is easy to pin due to the existence of interstitial carbon atoms, so that a yield platform is generated in the stretching process, the yield strength is low, and the yield platform is easy to appear; when the low-carbon hot-rolled strip steel is repeatedly bent by each roller of a pickling line and pulled and corrected by a scale breaker, the low-carbon hot-rolled strip steel is easy to yield, and the existence of a yield platform causes the surface of the low-carbon hot-rolled strip steel to slide, so that the surface of the low-carbon hot-rolled strip steel generates transverse fold lines, and the appearance of the product is influenced.
The low-carbon hot-rolled strip steel is transversely bent, the frequency of repeatedly bending the surface of the low-carbon hot-rolled strip steel is greatly related to the tension and straightening, so that the low-carbon hot-rolled strip steel is placed behind the welding machine 6 by the aid of the first flattening machine 8, deformation of the low-carbon hot-rolled strip steel is reduced as much as possible, the roll diameters of the first tension roll 7 and the second tension roll 9 behind the welding machine 6 are increased, bending of the surface of the low-carbon hot-rolled strip steel is reduced, and carbon atoms in the low-carbon hot-rolled strip steel are pinned after the low-carbon hot-rolled strip steel. Meanwhile, after the low-carbon hot-rolled strip steel is leveled by the first leveling machine 8, the surface wave shape of the low-carbon hot-rolled strip steel can be improved to a certain extent, so that scraping of a rubber roller of a subsequent production line is reduced, and damage to the production line is reduced.
In the embodiment shown in fig. 2, the low-carbon hot-rolled strip steel passing through the second tension roll 9 enters the inlet loop 10, and when the storage amount of the low-carbon hot-rolled strip steel in the inlet loop 10 is more than half, the subsequent processes can be performed, so that the pickling process can be ensured not to be interrupted. Therefore, in the present invention, the welding of the low-carbon hot rolled strip by the welder 6 and the reserves in the inlet loop 10 are all for the purpose of keeping the strip from being interrupted at any time during the pickling process, thereby improving the pickling efficiency.
As shown in fig. 2, the low-carbon hot-rolled strip passes through a turning roll from an inlet loop 10 and then enters a scale breaker 11, and the scale breaker 11 is used for cracking and dropping off the scale on the surface of the low-carbon hot-rolled strip.
After the scale of the low-carbon hot-rolled strip steel is broken, the low-carbon hot-rolled strip steel respectively enters an acid washing machine 12 and a rinsing machine 13 for acid washing and rinsing. The pickling step is to pickle iron oxide scale on the surface of the low-carbon hot rolled strip steel, and the rinsing step is to clean sulfuric acid remained in the low-carbon hot rolled strip steel during the pickling step so as to prevent the surface of the strip steel from being oxidized.
The rinsed low-carbon hot-rolled strip steel enters a dryer 14, and the dryer 14 dries water on the surface of the low-carbon hot-rolled strip steel.
The dried low-carbon hot-rolled strip steel enters a second flattening machine 15, the second flattening machine 15 is used for keeping the flatness of the pickled low-carbon hot-rolled strip steel with the thickness and the amount, then the low-carbon hot-rolled strip steel enters a third straightening machine 16 for straightening, and finally enters an outlet loop 17 for storing the pickled low-carbon hot-rolled strip steel.
According to the embodiment, the method for producing the high-carbon steel for the cutter based on the full endless thin slab continuous casting and rolling process, provided by the invention, adopts the ESP process to produce the measuring tool and the high-carbon steel for the cutter, can solve the problems of large thickness, high cost and the like of the measuring tool and the high-carbon steel for the cutter generated by the traditional hot rolling and thin slab continuous casting and rolling process represented by CSP, and achieves the purposes of energy conservation, environmental protection and cost reduction.
The method for producing a cutter high-carbon steel based on an all endless thin slab continuous casting and rolling process proposed according to the present invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the method for producing high carbon steel for tools based on the continuous casting and rolling process of the endless thin slab as set forth in the above description without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
Claims (8)
1. The acid pickling method of the low-carbon hot rolled strip steel is characterized by comprising the following steps of:
uncoiling the coiled low-carbon hot-rolled strip steel to form a low-carbon hot-rolled strip steel plate;
the low-carbon hot-rolled strip steel plate sequentially enters a straightener and an inlet shear, wherein the inlet shear shears damaged parts of the head and the tail of the low-carbon hot-rolled strip steel plate straightened by the straightener;
the sheared low-carbon hot rolled strip steel plates enter a welding machine for welding, wherein the welding machine performs head-to-tail welding on the adjacent low-carbon hot rolled strip steel plates;
the welded low-carbon hot-rolled strip steel plate sequentially passes through a first tension roller, a first leveling machine and a second tension roller, wherein,
the diameters of the first tension roller and the second tension roller are 1250-1400 mm,
the first tension roll and the second tension roll are used for keeping the tension of the low-carbon hot-rolled strip steel plate stable before and after passing through the first leveling machine and the elongation rate consistent,
the first leveling machine is used for eliminating a yield platform generated in the pickling process of the low-carbon hot rolled strip steel plate;
the low-carbon hot rolled strip steel passing through the second tension roll enters an inlet loop, the low-carbon hot rolled strip steel enters a scale breaker through the inlet loop, and the scale breaker breaks scales on the surface of the low-carbon hot rolled strip steel;
the low-carbon hot rolled strip steel plate after being subjected to scale breaking enters an acid washing machine and a rinsing machine for acid washing and rinsing;
and (3) the acid-washed and rinsed low-carbon hot-rolled strip steel sequentially passes through a dryer, a second straightening machine and a third straightening machine to finish acid washing.
2. The method for pickling a low-carbon hot-rolled steel strip as claimed in claim 1,
in the process of uncoiling the coiled low-carbon hot-rolled strip steel to form a low-carbon hot-rolled strip steel plate,
uncoiling coiled low-carbon hot-rolled strip steel by two uncoilers, and transmitting the uncoiled low-carbon hot-rolled strip steel plate to two straighteners; wherein,
the uncoiler comprises a first uncoiler and a second uncoiler, and the straightening machine comprises a first straightening machine and a second straightening machine.
3. The method for pickling a low-carbon hot-rolled steel strip as claimed in claim 2,
uncoiling the coiled low-carbon hot-rolled strip steel through the first uncoiler, and then, straightening the coiled low-carbon hot-rolled strip steel in the first straightener;
and uncoiling the coiled low-carbon hot-rolled strip steel through the second uncoiler, and then, feeding the uncoiled low-carbon hot-rolled strip steel into the second straightener for straightening.
4. The method for pickling a low-carbon hot-rolled steel strip as claimed in claim 3,
and the low-carbon hot-rolled strip steel plates straightened by the first straightener and the second straightener enter the inlet shears.
5. The method for pickling a low-carbon hot-rolled steel strip as claimed in claim 1,
the scale breaker is used for generating cracks on iron scales on the surface of the low-carbon hot-rolled strip steel plate and enabling the iron scales to fall off.
6. The method for pickling a low-carbon hot-rolled steel strip as claimed in claim 1,
and the second flattening machine is used for maintaining the flatness of the low-carbon hot rolled strip steel plate after acid pickling.
7. The method for pickling a low-carbon hot-rolled steel strip as claimed in claim 1,
the thickness of the low-carbon hot-rolled strip steel is 0.8-2.0 mm.
8. The method for pickling a low-carbon hot-rolled steel strip as claimed in claim 1,
and in the process that the damaged parts of the head and the tail of the low-carbon hot-rolled strip steel plate straightened by the straightener are sheared off by the entrance shears, the damaged parts of the head and the tail are 5-6 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642783.7A CN107321790B (en) | 2017-07-31 | 2017-07-31 | The acid washing method of low-carbon hot-rolling strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710642783.7A CN107321790B (en) | 2017-07-31 | 2017-07-31 | The acid washing method of low-carbon hot-rolling strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107321790A true CN107321790A (en) | 2017-11-07 |
| CN107321790B CN107321790B (en) | 2019-09-13 |
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Cited By (9)
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| CN108034957A (en) * | 2017-12-27 | 2018-05-15 | 日照宝华新材料有限公司 | High-carbon steel welds acid washing method |
| CN108356083A (en) * | 2018-04-23 | 2018-08-03 | 黄石山力科技股份有限公司 | A kind of coil of strip pickling skin pass mill group and coil of strip production method |
| CN108526911A (en) * | 2018-06-19 | 2018-09-14 | 夏征 | A kind of combined type scale removal equipment and minimizing technology |
| CN111151578A (en) * | 2020-01-19 | 2020-05-15 | 河钢股份有限公司承德分公司 | Method for eliminating transverse crease lines at head of low-carbon steel hot-rolled pickled plate |
| CN111590335A (en) * | 2020-05-31 | 2020-08-28 | 日照宝华新材料有限公司 | Smooth pickling production line for controlling transverse fold defects |
| CN111604697A (en) * | 2020-05-31 | 2020-09-01 | 日照宝华新材料有限公司 | Control method for transverse folding defect of thin-specification low-carbon steel |
| CN113732086A (en) * | 2021-10-09 | 2021-12-03 | 北京京诚之星科技开发有限公司 | Push-pull and continuous dual-purpose strip steel surface cleaning production line and cleaning method thereof |
| CN115255628A (en) * | 2022-07-28 | 2022-11-01 | 鞍钢股份有限公司 | Cold-rolled sheet welding process adopting solid laser welding machine |
| CN117564080A (en) * | 2023-10-20 | 2024-02-20 | 山西永硕新材料科技有限公司 | Equipment and process for producing heat-based zinc-aluminum-magnesium raw material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034957A (en) * | 2017-12-27 | 2018-05-15 | 日照宝华新材料有限公司 | High-carbon steel welds acid washing method |
| CN108034957B (en) * | 2017-12-27 | 2020-02-18 | 日照宝华新材料有限公司 | High-carbon steel welding and pickling method |
| CN108356083A (en) * | 2018-04-23 | 2018-08-03 | 黄石山力科技股份有限公司 | A kind of coil of strip pickling skin pass mill group and coil of strip production method |
| CN108526911A (en) * | 2018-06-19 | 2018-09-14 | 夏征 | A kind of combined type scale removal equipment and minimizing technology |
| CN108526911B (en) * | 2018-06-19 | 2021-12-10 | 夏征 | Combined type oxide skin removing equipment and removing method |
| CN111151578A (en) * | 2020-01-19 | 2020-05-15 | 河钢股份有限公司承德分公司 | Method for eliminating transverse crease lines at head of low-carbon steel hot-rolled pickled plate |
| CN111604697A (en) * | 2020-05-31 | 2020-09-01 | 日照宝华新材料有限公司 | Control method for transverse folding defect of thin-specification low-carbon steel |
| CN111604697B (en) * | 2020-05-31 | 2021-05-14 | 日照宝华新材料有限公司 | Control method for transverse folding defect of thin-specification low-carbon steel |
| CN113118783A (en) * | 2020-05-31 | 2021-07-16 | 日照宝华新材料有限公司 | Method for controlling low-carbon steel transverse folding defect with specification of 1.5-4 mm |
| CN111590335A (en) * | 2020-05-31 | 2020-08-28 | 日照宝华新材料有限公司 | Smooth pickling production line for controlling transverse fold defects |
| CN113732086A (en) * | 2021-10-09 | 2021-12-03 | 北京京诚之星科技开发有限公司 | Push-pull and continuous dual-purpose strip steel surface cleaning production line and cleaning method thereof |
| CN115255628A (en) * | 2022-07-28 | 2022-11-01 | 鞍钢股份有限公司 | Cold-rolled sheet welding process adopting solid laser welding machine |
| CN117564080A (en) * | 2023-10-20 | 2024-02-20 | 山西永硕新材料科技有限公司 | Equipment and process for producing heat-based zinc-aluminum-magnesium raw material |
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Denomination of invention: Pickling method of low carbon hot rolled strip Effective date of registration: 20211222 Granted publication date: 20190913 Pledgee: Rizhao Bank Co., Ltd Pledgor: RIZHAO BAOHUA NEW MATERIAL CO.,LTD. Registration number: Y2021980015871 |
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