CN108941199B - Steel bar casting and rolling system and steel bar casting and rolling method - Google Patents
Steel bar casting and rolling system and steel bar casting and rolling method Download PDFInfo
- Publication number
- CN108941199B CN108941199B CN201810675991.1A CN201810675991A CN108941199B CN 108941199 B CN108941199 B CN 108941199B CN 201810675991 A CN201810675991 A CN 201810675991A CN 108941199 B CN108941199 B CN 108941199B
- Authority
- CN
- China
- Prior art keywords
- casting
- roller
- rolling
- steel bar
- steel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/08—Diameter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2267/00—Roll parameters
- B21B2267/02—Roll dimensions
- B21B2267/06—Roll diameter
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Metal Rolling (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a steel bar casting and rolling system, which comprises: the double-roller casting and rolling machine set and the finishing mill set are sequentially arranged behind the front liquid box; the double-roller casting and rolling machine set comprises an upper casting roller, a lower casting roller and a casting nozzle, wherein the casting nozzle is connected with a liquid outlet of the front liquid tank in a sealing mode, and the upper casting roller and/or the lower casting roller are/is a water-cooled combined casting roller. The invention also relates to a steel bar casting and rolling method, which uses the steel bar casting and rolling system to perform casting and rolling. The cooling is realized by arranging one or more cold water tanks. The high-temperature alloy molten steel flowing out of the front liquid tank enters a double-roller casting and rolling unit, the temperature is rapidly reduced during casting and rolling forming, the shape of a billet is rapidly fixed, and after the billet is subjected to micro rolling deformation, the molten steel at the core part is ensured to be solidified, the billet structure is compact, and the shape and the size of the billet are ensured to be accurate. Meanwhile, the water cooling tank is arranged, so that the roller is not heated rapidly when being in contact with the high-temperature alloy molten steel for casting and rolling, the deformation phenomenon of the roller is caused, and the service life of the roller can be prolonged greatly.
Description
Technical Field
The invention relates to the technical field of steel casting and rolling, in particular to a steel bar casting and rolling system and a method for casting and rolling steel bars by applying the steel bar casting and rolling system, and aims to reduce the production cost of the steel bars and develop high-quality and high-performance steel bars.
Background
In recent decades, the steel industry around home and abroad has been developing new technologies for saving energy, improving production efficiency and improving product quality, so as to achieve the purpose of saving energy and improving quality continuously for a long time. The steel casting and rolling technology is a near-net-shape casting technology for directly casting a final product with the shape, size and quality as close as possible, and is a target for metallurgy and material scientists to dread for over a century.
The research on the experiments and theories of the twin-roll casting of thin steel strips was conducted in the united states, japan, germany, france, korea, china, and other countries with sequential organization forces beginning in the 50 th century. In the early 90 th generation of 20 years, the market competition of the steel industry is fierce, so that the climax of experimental research of a strip steel casting and rolling technology is promoted worldwide. Based on the superiority of the strip casting and rolling technology, the total investment for developing the casting and rolling technology in the world is about one hundred million dollars in the past two decades, and accounts for about 1-2% of the scientific and technological development investment for the steel industry every year. The industrial application of the technology has great influence on the metallurgical industry and plays a revolutionary driving role in the progress of the metallurgical industry. At present, the technology is widely adopted internationally to produce thin strips with fine grains and homogeneity, and the varieties are mainly concentrated on stainless steel and plain carbon steel.
At present, the production methods of reinforcing steel bars at home and abroad mainly comprise a hot rolling method and a cold rolling method, and the data of the reinforcing steel bar produced by a casting and rolling method is not reported. The production method of hot rolling and cold rolling of the steel bar has the problems of long production process, high energy consumption, more loss of head and tail materials, necessity of organizing mass production, limitation of production materials and the like. The casting and rolling method has the characteristics of short flow, low energy consumption, low cost, low investment, flexible production, fine product crystal grains, unique performance and the like, and has wide development prospect; is one of effective ways for realizing resource saving and environmental protection in the steel industry.
The twin roll strip casting technology has achieved great success abroad. The research of twin roll strip casting technology in the countries of the united states, australia, japan, korea, france, germany, etc. is leading, the Nucor company of the united states has succeeded in applying a technology to industrial production, and the BHP company of australia, the new day iron of japan, the pum item of korea, the knoll company of france, etc. has also had production technology capability of industrial tests.
After the 80 s in the 20 th century, with the development of foreign twin-roll strip casting technology, China restarts the research work, and a plurality of experimental research casting and rolling production lines are built in units such as northeast academy of industry, northeast university, Shanghai iron and steel institute, Bao steel and the like.
The working principle of the steel bar casting and rolling system is the same as that of the thin strip casting and rolling system, molten steel is cast and rolled to form, only the shapes and sizes of cast and rolled products are different, and the successful experience of the thin strip casting and rolling machine can be referred and referred in the design of the steel bar casting and rolling system and the casting and rolling roller.
In view of the above, the present invention provides a steel bar casting and rolling system and a steel bar casting and rolling method to solve the problems of long steel bar production flow and large energy consumption, which are the problems to be solved in the art.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a steel bar casting and rolling system and a method for casting and rolling steel bars by using the steel bar casting and rolling system, so as to reduce the processing cost of hot rolling or cold rolling of the existing steel bars and produce high-quality steel bars. In order to solve the problems, the technical scheme of the steel bar casting and rolling system provided by the invention is as follows:
the invention relates to a steel bar casting and rolling system, which comprises: the double-roller casting and rolling machine set comprises a smelting furnace, a front liquid box, a double-roller casting and rolling machine set and a finishing rolling machine set, wherein the smelting furnace is communicated with the front liquid box through a diversion trench, and the double-roller casting and rolling machine set and the finishing rolling machine set are sequentially arranged behind the front liquid box. The double-roller casting and rolling machine set comprises an upper casting roller, a lower casting roller and a casting nozzle, the casting nozzle is connected with a liquid outlet of the front liquid tank, and the upper casting roller and/or the lower casting roller are/is a water-cooled combined casting roller. The smelting furnace is communicated with the front liquid box through the guide groove, can be in a sealed communication mode, and can also be in a guide groove communication mode.
Compared with the production and processing technology of the steel bar in the prior art, the steel bar casting and rolling system of the invention adopts the casting and rolling mode to process the steel bar, greatly shortens the production flow of the steel bar, greatly reduces the energy consumption and does not generate the loss of multi-head tailings. Due to the adoption of the casting and rolling mode, namely, the casting and rolling unit and the finishing mill unit are connected, molten steel is cast and rolled into a steel bar blank with a preset shape after passing through the casting and rolling unit, and then immediately enters the finishing mill unit to carry out one or more steps of finish rolling to form a steel bar with a preset shape, such as deformed steel bar, channel steel or angle steel.
Meanwhile, an upper casting roller of the double-roller casting and rolling unit is set as a water-cooled combined casting roller, or a lower casting roller of the double-roller casting and rolling unit is set as a water-cooled combined casting roller, or both the upper casting roller and the lower casting roller of the double-roller casting and rolling unit are set as water-cooled combined casting rollers. Thus, the combination mode can be selected according to the temperature requirement of the steel bar blank after casting and rolling.
As an improvement of the steel bar casting and rolling system, the upper casting roller and the lower casting roller have the same structure and comprise roller sleeves and roller cores, and at least one water cooling tank is arranged between the roller sleeves and the roller cores. The water cooling tank is characterized in that a water inlet pipe and a water inlet regulating valve are connected to the water inlet end of the water cooling tank, a water outlet pipe and a water outlet regulating valve are connected to the water outlet end of the water cooling tank, and the water cooling tank is used for feeding and discharging water at the same end of the upper casting roller and the lower casting roller or feeding water from one end and discharging water from the other end. Each water cooling tank is connected with a separate cold source. Or the upper casting roller and the lower casting roller have different structures, and only one of the upper casting roller and the lower casting roller is provided with at least one water cooling groove, and the other water cooling groove is not provided.
The upper casting roller or/and the lower casting roller of the double-roller casting and rolling unit is/are designed into a water-cooled combined roller, and the cooling is realized by arranging one or more cold water tanks. Therefore, the high-temperature alloy molten steel flowing out of the front liquid tank enters the double-roller casting and rolling unit, the temperature is rapidly reduced while casting and rolling are carried out, the shape of the steel billet is rapidly fixed, and the steel billet cannot be deformed due to the fact that the steel billet is still in a molten state. Or after the billet is subjected to micro rolling deformation, the molten steel in the core part is ensured to be solidified, the billet structure is compact, and the shape and the size of the billet are ensured to be accurate. Meanwhile, the water cooling tank is arranged, so that the upper casting roller and the lower casting roller are not heated rapidly when being in contact with the high-temperature alloy molten steel for casting and rolling, the deformation of the casting rollers is avoided, and the service life of the casting rollers can be prolonged greatly. The port of the water cooling tank is provided with the water inlet and outlet pipe and the corresponding regulating valve, so that the temperature during casting and rolling can be regulated by regulating the flow speed and flow of cold water, and the casting and rolling temperature can be further regulated according to the requirement or the temperature of alloy molten steel in the front liquid tank.
Furthermore, the periphery of the upper casting roller and the periphery of the lower casting roller are provided with one or more hole grooves surrounding the upper casting roller and the lower casting roller, the one or more hole grooves on the upper casting roller and the lower casting roller are arranged in a one-to-one correspondence manner, and the upward cross sections of the hole grooves on the upper casting roller and the lower casting roller are in the shape of an angle groove, a square groove, a semi-circular groove or a trapezoid groove.
Furthermore, the periphery of a roller of the finishing mill group is provided with finishing rolling hole grooves with the number and the shape matched with those of the hole grooves.
Therefore, according to the shape and structure of the produced steel bar, the groove shape on the surface of the roller can be correspondingly designed, the finish rolling procedure is reduced, and the energy is saved.
As a further improvement of the steel bar casting and rolling system, a heating device, a temperature controller and a metal liquid level height monitoring device are arranged in the front liquid tank. Therefore, the temperature and the liquid level height of the alloy molten steel in the front liquid tank can be adjusted in real time, and the temperature is adjusted to meet the requirement of casting and rolling temperature; the level is adjusted to ensure the velocity of the alloy steel flowing through the nozzle.
As a further improvement of the above-mentioned steel bar casting and rolling system of the present invention, one or more sets of guide rolls are disposed between the twin-roll casting and rolling unit and the finishing rolling unit, and the outlet of the twin-roll casting and rolling unit, the guide rolls, and the inlet of the finishing rolling unit are located on the same horizontal plane. In this way, the guide rolls guide the reinforcing bar stock coming out of the twin roll casting mill group to the finishing mill group so that the reinforcing bar stock can be accurately input to the rolling entrance of the finishing mill group, and simultaneously, the reinforcing bar stock still in a red hot state can be prevented from bending deformation during the process from the twin roll casting mill group to the finishing mill group.
The invention also provides a steel bar casting and rolling method, which adopts the technical scheme as follows:
the invention relates to a steel bar casting and rolling method, which uses the steel bar casting and rolling system to perform casting and rolling, and comprises the following steps:
firstly, putting iron and ferroalloy into a smelting furnace for smelting, controlling the smelting temperature at 1500-1750 ℃, and deoxidizing and deslagging molten steel.
Secondly, the smelted molten steel is conveyed into a front liquid box through a diversion trench, the temperature of the molten steel in the front liquid box is kept between 1450 ℃ and 1650 ℃, and the liquid level in the front liquid box is controlled to be 5mm to 20mm higher than a casting nozzle of a double-roller casting and rolling unit.
Thirdly, the molten steel smelted in the smelting furnace enters the space between the upper casting roller and the lower casting roller of the double-roller casting and rolling unit through the front liquid box and the casting nozzle to be cast and rolled, the temperature is controlled to be 1450-1650 ℃ during casting and rolling, the casting and rolling speed is 2-120 m/min, and the steel is rolled into a steel billet with a preset shape.
Fourthly, the cast and rolled steel billet is finish rolled by one or more finishing mill groups to obtain the required finished product steel bar.
And as a further improvement of the steel bar casting and rolling method, in the second step, after the molten steel enters the front liquid tank, the temperature fluctuation is controlled within +/-20 ℃.
The steel bar casting and rolling system provided by the invention has the beneficial effects that:
the steel bar is processed by using a casting and rolling mode, so that the production flow of the steel bar is greatly shortened, the energy consumption is greatly reduced, and the loss of a plurality of head tails can not be generated. Due to the adoption of the casting and rolling mode, namely, the casting and rolling unit and the finishing mill unit are connected, molten steel is cast and rolled into a steel bar blank with a preset shape after passing through the casting and rolling unit, and then immediately enters the finishing mill unit to carry out one or more steps of finish rolling to form a steel bar with a preset shape, such as deformed steel bar, channel steel or angle steel.
The cooling is realized by arranging one or more cold water tanks. The high-temperature alloy molten steel flowing out of the front liquid tank enters a double-roller casting and rolling unit, the temperature is rapidly reduced during casting and rolling forming, the shape of the billet is rapidly fixed and cannot be deformed due to the fact that the billet is still in a molten state, after the billet is deformed by micro rolling, the molten steel of a core part is guaranteed to be solidified, the structure of the billet is compact, and the shape and the size of the billet are guaranteed to be accurate. Or after the billet is subjected to micro rolling deformation, the molten steel in the core part is ensured to be solidified, the billet structure is compact, and the shape and the size of the billet are ensured to be accurate. Meanwhile, the water cooling tank is arranged, so that the casting roller is not heated rapidly when being in contact with high-temperature molten steel for casting and rolling, the phenomenon of deformation of the casting roller is caused, and the service life of the casting roller can be prolonged greatly. The port of the water cooling tank is provided with the water inlet and outlet pipe and the corresponding regulating valve, so that the temperature during casting and rolling can be regulated by regulating the flow speed and flow of cold water, and the casting and rolling temperature can be further regulated according to the requirement or the temperature of alloy molten steel in the front liquid tank.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural view of a steel bar casting and rolling system according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of a front liquid tank in the steel bar casting and rolling system according to the first embodiment of the present invention;
fig. 3 is a schematic structural view of a casting roll in the steel bar casting-rolling system according to the first embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of the casting rolls in the direction D-D in the steel bar casting-rolling system according to the first embodiment of the present invention.
The figures are labeled as follows:
1-smelting a furnace; 12-a diversion trench; 2-a front liquid tank; 21-a heating device; 22-a temperature controller; 23-metal level height monitoring device; 3-twin roll casting and rolling unit; 31-upper casting and rolling; 32-lower casting roller; 33-a casting nozzle; 311-roll sleeve; 312-a roll core; 313-a water cooling tank; 314-a water inlet pipe; 315-water inlet regulating valve; 316-water outlet pipe; 317-water outlet regulating valve; 318-hole slot; 4-finishing mill group; 5-guide roll.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention are described below with reference to the accompanying drawings.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
Referring to fig. 1, a steel bar casting and rolling system of the present embodiment includes: the smelting furnace 1 is hermetically communicated with the front liquid tank 2 through a diversion trench 12, and the double-roller casting and rolling unit 3 and the finishing rolling unit 4 are sequentially arranged behind the front liquid tank 2.
With continued reference to fig. 3 and 4, the twin roll caster set 3 includes an upper casting roll 31, a lower casting roll 32, and a nozzle 33, the nozzle 33 is connected to the outlet of the front liquid tank 2, and the upper casting roll 31 and/or the lower casting roll 32 are water-cooled combined casting rolls.
The upper casting roller 31 and the lower casting roller 32 have the same structure and comprise a roller sleeve 311 and a roller core 312, and at least one water cooling groove 313 is arranged between the roller sleeve 311 and the roller core 312.
The water inlet end of the water cooling tank 313 is connected with a water inlet pipe 314 and a water inlet adjusting valve 315, the water outlet end of the water cooling tank 313 is connected with a water outlet pipe 316, and the water cooling tank 313 is used for water inlet and outlet at the same end of the upper casting roller 31 and the lower casting roller 32 or water inlet from one end and water outlet from the other end. In another embodiment, the water outlet pipe 316 of the water outlet end of the water cooling tank 313 is provided with an outlet water regulating valve 317 at the tail end.
One or more hole grooves 318 surrounding the upper casting roll 31 and the lower casting roll 32 are formed in the peripheries of the upper casting roll 31 and the lower casting roll 32, the one or more hole grooves 318 on the upper casting roll 31 and the lower casting roll 32 are arranged in a one-to-one correspondence mode, and the cross section of each hole groove 318 in the axial direction of the upper casting roll 31 and the lower casting roll 32 is an angular groove, a square groove, a semicircular groove or a trapezoidal groove. The periphery of the roller of the finishing mill group 4 is provided with finishing rolling hole grooves with the number and the shape matched with the hole grooves 318.
With continued reference to fig. 2, a heating device 21, a temperature controller 22 and a metal level monitoring device 23 are provided in the front liquid tank 2.
With continued reference to fig. 1, one or more sets of guide rolls 5 are provided between the twin roll casting and finishing train 3 and 4, and the outlet of the twin roll casting and finishing train 3, the guide rolls 5, and the inlet of the finishing train 4 are on the same horizontal plane.
Example two
Referring to fig. 1, fig. 2, fig. 3 and fig. 4, a steel bar casting method of the present embodiment performs casting and rolling by using the steel bar casting and rolling system according to the first embodiment, and the casting and rolling method includes the following steps:
firstly, putting iron and ferroalloy into a smelting furnace 1 for smelting, controlling the smelting temperature at 1500-1750 ℃, and deoxidizing and deslagging molten steel.
Secondly, the smelted molten steel is conveyed into a front liquid box 2 through a diversion trench 12, the temperature of the molten steel in the front liquid box 2 is kept between 1450 and 1650 ℃, and the liquid level in the front liquid box 2 is controlled to be 5 to 20mm higher than the upper nozzle of a casting nozzle 33 of a double-roller casting and rolling unit 3;
thirdly, molten steel smelted in the smelting furnace 1 enters a space between an upper casting roller 31 and a lower casting roller 32 of a double-roller casting and rolling unit 3 through a front liquid box 2 and a casting nozzle 33 to be cast and rolled, the temperature is controlled to be 1450-1650 ℃ during casting and rolling, the casting and rolling speed is 2-120 m/min, and steel billets with preset shapes are rolled;
fourthly, the cast and rolled steel billet is finish rolled by one or more finishing mill groups 4 to obtain the required finished product steel bar.
Preferably, the temperature of the molten steel in the second step is controlled within plus or minus 20 ℃ after entering the front liquid tank 2.
EXAMPLE III
The embodiment provides a cast-rolling production HRB400 twisted steel phi 16mm specification product.
And (3) delivering the smelted HRB400 molten steel to a front liquid box 2 through a diversion trench 12, controlling the temperature of the molten steel in the front liquid box 2 to be 1530 +/-20 ℃, and controlling the liquid level of the molten steel in the front liquid box 2 to be 15-18 mm above a casting nozzle.
The upper casting roller 31 and the lower casting roller 32 are respectively provided with eight groups of semicircular hole grooves 318, the hole pattern size of the hole grooves 318 is phi 40mm, and the interval of each group of hole grooves 318 is 30 mm; the water cooling grooves 313 of the upper casting roller 31 and the lower casting roller 32 are filled with cooling water, the water temperature in the water inlet pipe 314 is controlled to be 5-60 ℃, and the water pressure is controlled to be 0.3 MPa.
The molten steel is cast and rolled by a double-roller casting and rolling unit 3 to form eight round continuous steel bar blanks with the size of phi 40mm, the casting and rolling speed of the double-roller casting and rolling unit 3 is controlled to be 5m/min, and the steel bar blanks are guided into a finishing mill unit 4 through guide rollers 5.
Two finishing mill groups 4 are required for finish rolling to prepare the phi 16mm twisted steel, the first finishing mill group 4 rolls to phi 26mm, and the second finishing mill group 4 rolls to phi 16mm twisted steel. The first finishing mill group 4 selects the roller with eight groups of semi-circular hole grooves with phi of 26mm, and the first finishing mill group 4 selects the roller with eight groups of deformed steel hole grooves with phi of 16 mm.
Example four
The embodiment provides a product with the specification of HRB400 twisted steel phi 28mm produced by cast rolling.
And (3) delivering the smelted HRB400 molten steel to a front liquid box 2 through a diversion trench 12, controlling the temperature of the molten steel in the front liquid box 2 to be 1530 +/-15 ℃, and controlling the liquid level of the molten steel in the front liquid box 2 to be 12-18 mm above a casting nozzle.
Eight groups of semicircular hole grooves 318 are respectively arranged on the upper casting roller 31 and the lower casting roller 32, the hole pattern size of the hole grooves 318 is phi 40mm, and the interval of each group of hole grooves 318 is 25 mm-30 mm; the water cooling tank 313 of the upper casting roller 31 is filled with cooling water, the water temperature in the water inlet pipe 314 is controlled to be 15-55 ℃, and the water pressure is controlled to be 0.3-0.45 MPa. The lower casting roll 32 is not provided with a water cooling tank 313.
The molten steel is cast and rolled by a double-roller casting and rolling unit 3 to form eight round continuous steel bar blanks with the size of phi 40mm, the casting and rolling speed of the double-roller casting and rolling unit 3 is controlled to be 5 m/min-8 m/min, and the steel bar blanks are guided into a finishing mill unit 4 through guide rollers 5.
Only one finishing mill group 4 is needed for finish rolling for preparing the phi 28mm deformed steel bar, and eight groups of rollers with phi 28mm deformed steel bar hole grooves are selected and arranged by the finishing mill group 4.
EXAMPLE five
The embodiment provides a cast-rolling production HRB400 twisted steel phi 6mm specification product.
And (3) delivering the smelted HRB400 molten steel to a front liquid box 2 through a diversion trench 12, controlling the temperature of the molten steel in the front liquid box 2 to be 1530 +/-10 ℃, and controlling the liquid level of the molten steel in the front liquid box 2 to be 12-15 mm above a casting nozzle.
The upper casting roller 31 and the lower casting roller 32 are respectively provided with 30 groups of semicircular hole grooves 318, the hole pattern size of the hole grooves 318 is phi 10mm, and the interval of each group of hole grooves 318 is 10 mm; the water cooling grooves 313 of the upper casting roller 31 and the lower casting roller 32 are filled with cooling water, the water temperature in the water inlet pipe 314 is controlled at 20-50 ℃, and the water pressure is controlled at 0.3-0.35 MPa.
The molten steel is cast and rolled by a double-roller casting and rolling unit 3 to form 30 round continuous steel bar blanks with the size of phi 10mm, the casting and rolling speed of the double-roller casting and rolling unit 3 is controlled to be 10m/min, and the steel bar blanks are guided into a finishing mill unit 4 through guide rollers 5.
Only one finishing mill group 4 is needed for finish rolling for preparing the phi 6mm deformed steel bar, and the finishing mill group 4 selects and uses rollers provided with 30 groups of phi 6mm deformed steel bar hole grooves.
EXAMPLE six
The embodiment provides a product with the specification of phi 20mm for producing HPB300 smooth round steel bars by cast rolling.
And (3) delivering the molten HPB300 liquid steel which is smelted into the front liquid box 2 through the diversion trench 12, controlling the temperature of the liquid steel in the front liquid box 2 to be 1550 +/-10 ℃, and controlling the liquid level of the liquid steel in the front liquid box 2 to be 15-18 mm above a casting nozzle.
15 groups of semicircular hole grooves 318 are respectively arranged on the upper casting roller 31 and the lower casting roller 32, the hole pattern size of the hole grooves 318 is phi 20mm, and the interval of each group of hole grooves 318 is 15 mm; the water cooling grooves 313 of the upper casting roller 31 and the lower casting roller 32 are filled with cooling water, the water temperature in the water inlet pipe 314 is controlled at 10-45 ℃, and the water pressure is controlled at 0.3-0.35 MPa.
The molten steel is cast and rolled by a double-roller casting and rolling unit 3 to form 15 round continuous steel bar blanks with the size of phi 20mm, the casting and rolling speed of the double-roller casting and rolling unit 3 is controlled to be 7m/min, and the steel bar blanks are cut off by flying shears to obtain corresponding smooth round steel bars without finish rolling of a finishing mill unit 4.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (7)
1. A bar casting and rolling system, the system comprising: the smelting furnace (1) is communicated with the front liquid box (2) through a diversion trench (12), and the double-roller casting and rolling unit (3) and the finishing rolling unit (4) are sequentially arranged behind the front liquid box (2);
the double-roller casting and rolling unit (3) comprises an upper casting roller (31), a lower casting roller (32) and a casting nozzle (33), the casting nozzle (33) is connected with a liquid outlet of the front liquid tank (2), the upper casting roller (31) and/or the lower casting roller (32) are/is a water-cooled combined casting roller, the upper casting roller (31) and the lower casting roller (32) have the same structure and comprise a roller sleeve (311) and a roller core (312), and at least one water cooling groove (313) is formed between the roller sleeve (311) and the roller core (312);
the water inlet end of the water cooling tank (313) is connected with a water inlet pipe (314) and a water inlet adjusting valve (315), the water outlet end of the water cooling tank (313) is connected with a water outlet pipe (316), and the water cooling tank (313) is used for water inlet and outlet at the same end of the upper casting roller (31) and the lower casting roller (32) or water inlet from one end and water outlet from the other end.
2. The steel bar casting and rolling system according to claim 1, wherein one or more hole grooves (318) surrounding the upper casting roll (31) and the lower casting roll (32) are formed in the peripheries of the upper casting roll (31) and the lower casting roll (32), the one or more hole grooves (318) in the upper casting roll (31) and the lower casting roll (32) are arranged in a one-to-one correspondence manner, and the cross-sectional shapes of the hole grooves (318) in the axial direction of the upper casting roll (31) and the lower casting roll (32) are angular grooves, square grooves, semicircular grooves or trapezoidal grooves.
3. A steel bar casting and rolling system according to claim 2, wherein the rolls of the finishing mill group (4) are provided with finishing rolling grooves on the outer circumference thereof in a number and shape matching the grooves (318).
4. A steel bar casting and rolling system according to any one of claims 1 to 3, wherein a heating device (21), a temperature controller (22) and a metal level monitoring device (23) are arranged in the front liquid tank (2).
5. A steel bar casting and rolling system according to any one of claims 1 to 3, characterized in that one or more sets of guide rolls (5) are arranged between the twin roll casting and rolling train (3) and the finishing rolling train (4), and the outlet of the twin roll casting and rolling train (3), the guide rolls (5) and the inlet of the finishing rolling train (4) are on the same horizontal plane.
6. A steel bar casting-rolling method for casting-rolling a steel bar using the steel bar casting-rolling system according to any one of claims 1 to 5, comprising the steps of:
firstly, putting iron and ferroalloy into a smelting furnace (1) for smelting, controlling the smelting temperature at 1500-1750 ℃, and deoxidizing and deslagging molten steel;
secondly, the smelted molten steel is conveyed into a front liquid box (2) through a diversion trench (12), the temperature of the molten steel in the front liquid box (2) is kept at 1450-1650 ℃, and the liquid level in the front liquid box (2) is controlled to be 5-20 mm higher than a casting nozzle (33) of a double-roller casting and rolling unit (3);
thirdly, the molten steel smelted in the smelting furnace (1) enters between the upper casting roller (31) and the lower casting roller (32) of the double-roller casting and rolling unit (3) through the front liquid box (2) and the casting nozzle (33) to be cast and rolled, the temperature is controlled to be 1450-1650 ℃ during casting and rolling, the casting and rolling speed is 2-120 m/min, and a steel billet with a preset shape is rolled;
fourthly, the cast and rolled steel billet is finish rolled by one or more finishing mill groups (4) to obtain the required finished product steel bar.
7. A method as claimed in claim 6, wherein in step two, the temperature of the molten steel is controlled to be within ± 20 ℃ after entering the front liquid tank (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810675991.1A CN108941199B (en) | 2018-06-27 | 2018-06-27 | Steel bar casting and rolling system and steel bar casting and rolling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810675991.1A CN108941199B (en) | 2018-06-27 | 2018-06-27 | Steel bar casting and rolling system and steel bar casting and rolling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108941199A CN108941199A (en) | 2018-12-07 |
| CN108941199B true CN108941199B (en) | 2020-02-21 |
Family
ID=64486950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810675991.1A Active CN108941199B (en) | 2018-06-27 | 2018-06-27 | Steel bar casting and rolling system and steel bar casting and rolling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108941199B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111922081B (en) * | 2019-06-26 | 2021-11-26 | 太原科技大学 | Continuous casting-rolling and rolling short-process preparation method of special-shaped magnesium alloy section |
| CN110479763B (en) * | 2019-07-19 | 2021-01-05 | 浙江瑞浦科技有限公司 | Method for directly hot-rolling continuous casting billet into hexagonal stainless steel coil |
| CN110539129A (en) * | 2019-07-30 | 2019-12-06 | 浙江双飞无油轴承股份有限公司 | method for quickly manufacturing front liquid box of aluminum-based sliding bearing plate continuous casting production line |
| CN111495971A (en) * | 2020-05-06 | 2020-08-07 | 义乌聚龙自动化科技有限公司 | Continuous casting and rolling equipment and method for aluminum alloy plate |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306889A (en) * | 2000-01-31 | 2001-08-08 | 湖南长沙万达电源科技发展有限公司 | Continuous lead alloy band casting and rolling equipment |
| JP4555183B2 (en) * | 2005-07-15 | 2010-09-29 | 株式会社神戸製鋼所 | Manufacturing method of forming aluminum alloy sheet and continuous casting apparatus for forming aluminum alloy |
| CN1824399A (en) * | 2006-01-04 | 2006-08-30 | 太原科技大学 | New technology of bar material contiauous casting and milling |
| CN101693288B (en) * | 2009-11-02 | 2011-09-28 | 中铝洛阳铜业有限公司 | Continuous casting-rolling production method for strips of copper and copper alloys |
| CN103388064A (en) * | 2013-08-19 | 2013-11-13 | 梧州市永达钢铁有限公司 | Manufacturing method for high-strength steel bar |
| CN103722140A (en) * | 2014-01-17 | 2014-04-16 | 上海西重所重型机械成套有限公司 | Continuous cast-rolling process and continuous cast-rolling process system for magnesium alloy plate and strip |
| CN205165782U (en) * | 2015-08-17 | 2016-04-20 | 共慧冶金设备科技(苏州)有限公司 | Aluminium alloy wire casts system of rolling in succession |
| CN206083413U (en) * | 2016-07-21 | 2017-04-12 | 广东广云新材料科技股份有限公司 | A cast roll for casting and rolling mill |
-
2018
- 2018-06-27 CN CN201810675991.1A patent/CN108941199B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108941199A (en) | 2018-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108941199B (en) | Steel bar casting and rolling system and steel bar casting and rolling method | |
| EP1870172B1 (en) | A continuous casting and rolling method for medium plate | |
| EP3851216B1 (en) | Method for producing ultra-thin hot-rolled strip steel | |
| TW302313B (en) | ||
| CN101391264B (en) | Technique method of thin middle plate continuous casting and rolling production | |
| EP3804874A1 (en) | Metal compound plate strip continuous production equipment and method | |
| CN103710507B (en) | A kind of preparation method of low nickel duplex stainless steel hot-rolled sheet coil | |
| CN104213033A (en) | 60-steel hot rolling coil rod with high strength and high plasticity and production method thereof | |
| CN101804564B (en) | High-efficiency short-flow production line of composite material of high-alloy steel and high-alloy steel | |
| CN101293258B (en) | Process for manufacturing hot rolled steel strips by continuous casting and rolling middle bar strip | |
| CN103276286B (en) | Production method of X80 pipeline steel strip with thickness of 6-10 mm | |
| CN109092895B (en) | Steel bar continuous casting and rolling system and steel bar continuous casting and rolling production method | |
| CN1978080A (en) | Band-steel producing process EPS | |
| CN109261740A (en) | A kind of short route production copper door band technique | |
| CN108941196A (en) | A method of with 200 big cross section square billet continuous rolling small-sized bars | |
| CN109482646B (en) | Dynamic variable-schedule ferrite rolling method based on endless rolling | |
| CN109127730B (en) | A kind of 5356 aluminium alloy rod continuous casting and rolling production systems | |
| CN107523749A (en) | Based on the method that cutter high-carbon steel is produced completely without head bar strip continuous casting and rolling flow path | |
| CN208357467U (en) | A kind of reinforcing bar casting system | |
| CN104399748A (en) | Production line capable of replacing conventional hot continuous rolling production line of wide strip steel and rolling process | |
| CN113877961A (en) | Stainless steel composite steel bar and preparation method thereof | |
| CN100336617C (en) | Method for using hot-rolled steel plate to produce and steel cylinder by using continuously casting and rolling thin steel blanket | |
| CN107639116A (en) | A kind of continuous casting line | |
| CN208373823U (en) | A kind of reinforcing bar continuous casting and rolling system | |
| CN108435794B (en) | A kind of process of continuous casting and rolling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: The invention relates to a steel bar casting and rolling system and a steel bar casting and rolling method Effective date of registration: 20211026 Granted publication date: 20200221 Pledgee: China Construction Bank Co.,Ltd. Loudi branch Pledgor: HUNAN 3T NEW MATERIAL Co.,Ltd. Registration number: Y2021430000063 |