CN106180192B - A kind of wire and rod continuous casting billet high speed direct sending directly rolls system and method - Google Patents

Abstract

The invention provides a high-speed direct-feeding and direct-rolling system and method for continuous casting billets of wire and rod, which include a small-radius high-speed casting machine, a rapid hydraulic shear, a roller table after cutting, a billet discharge roller table, and a casting billet forming machine. A group of hot-feeding roller tables, a single slab conveying roller table, and a wire and bar mill; a horizontal steel transfer machine is arranged between the billet discharge roller table and the grouped hot-sending roller table, and the grouped slabs are heated There is a steel separating machine between the conveying roller table and the single slab conveying roller table. The slabs are assembled into groups on the billet discharge roller table and moved into the grouped hot delivery roller table by the horizontal steel transfer machine. The grouped slabs are assembled by The splitter divides the billet into single strands and transports them to the wire and bar rolling mill for rolling through the single billet conveying roller table. The high-efficiency continuous casting of the small-radius high-speed continuous casting machine of the present invention has the advantages of high casting billet drawing temperature, regular shape, small temperature loss, rapid casting billet shearing, and high casting billet initial temperature. The horizontal steel transfer machine groups the billets into groups at high speed, and sends them to rolling steel in groups through the hot-feeding roller table. In this way, the temperature drop of the billets is extremely small during transportation.

Description

A system and method for high-speed direct feeding and direct rolling of wire and bar continuous casting slabs

technical field

The invention belongs to the technical field of metal continuous casting and rolling, and in particular relates to a high-speed direct-feeding and direct-rolling system and method for continuous casting slabs of wire and rod.

Background technique

At present, the production process of wire and bar is mostly: the molten steel is cooled and solidified by the continuous casting crystallizer and the secondary cooling section, and then straightened by the drawing and leveling machine to pull out the cast slab, and the cast slab is cut to length by flame and then conveyed by the cutting roller table and The roller table is sent to the blanking area. The casting slabs that need to be hot-sent are sent to the hot-sending roller table through the steel turning machine, steel transfer machine, and steel separator, and are directly sent to the rolling steel into the heating furnace; Send it to the steel turning cooling bed for cooling, and then the slab collection platform is collected by the crane and stacked off the assembly line. The temperature of the slab sent to the steel rolling heating furnace is generally in the range of 500-600°C. The slab at this temperature cannot be rolled directly. It needs to be reheated to 1040-1140°C in the heating furnace before rolling. The off-line cast slabs are generally stored and naturally cooled to room temperature, and then sent to rolling steel to be heated in a heating furnace and then rolled. The defect of this production process is that: reheating the high-temperature slab after cooling will easily cause a lot of energy consumption, even if it is hot charging and hot delivery, it still needs to be heated, which also consumes a lot of energy; the construction investment of the steel rolling heating furnace, daily maintenance , Material consumption, etc. will also consume huge economic inputs.

In order to avoid the occurrence of the above phenomenon, adopting the direct rolling technology is a very safe and flexible measure. The core of the direct rolling technology is: the slab is rolled directly without a heating furnace, the rolling start temperature is between conventional rolling and low temperature rolling, the final rolling temperature is not much different from the conventional rolling temperature, and the slab is raised to Reduce the temperature of the rolling mill, shorten the time from the continuous casting machine to the rolling mill, and ensure a higher rolling start temperature.

The continuous casting slab is cut and sent to the rolling mill at high speed. The slab has not been heated, and its surface temperature is lower than the conventional rolling start temperature, but the center temperature of the slab is much higher than the surface temperature, which is easy to deform and penetrate deeply. The pressing and elimination of the internal defects of the billet, the outward diffusion of the internal high temperature area in the rough rolling stage, produce a uniform temperature effect, increase the surface temperature, and promote the improvement of the internal quality.

The Chinese patent with application number 201020160403.X discloses a flexible connection device for endless rolling of profiles and bars. According to the patent, it provides three types of flexible connection devices: one is made of soft pressing rollers One is composed of a large reduction rolling mill; the other is composed of the above-mentioned soft reduction roll system and a large reduction rolling mill, and one of the three forms is selected to be installed between the crystallizer and the conventional rolling mill. In this patent, a reduction device is set between the continuous casting machine and the rolling mill, and the section size of the slab is gradually compressed to increase the speed from the slab to the rolled steel, so as to realize the seamless connection and flexible connection between the continuous casting and the rolled steel, shortening the process and line length. Since there is no slab cutting process in this technology, generally only single-strand production can be realized. For wire and bar production, the output of a single-strand production line is too low. If multi-strand production is adopted, each stream must be equipped with a corresponding rolling unit, which will cause problems such as excessive investment and inconvenient on-site production organization and management.

The Chinese patent with the application number 201010185485.8 discloses a continuous casting and rolling method for producing profiles and bars by utilizing the waste heat of molten steel. Cutting or coiling, cooling, finishing bales to storage. The invention overcomes the problems of energy waste, multiple head cutting, all reheating and one short ruler in each section existing in the prior art, and saves energy and reduces loss. However, this technology is more suitable for single-strand or double-strand continuous casting machines. For multi-strand continuous casting machines, the number of rolling mill units will be very large, and it is not easy to operate and organize production management.

The Chinese patent application with the application number 201310475792.3 discloses a method for producing long profiles by direct rolling. According to the patent, the method includes continuous casting machine, billet roller table, thermal insulation transition stand, induction heating device and rolling mill and other equipment . Although this invention improves the original way of heating the continuous casting billet in the furnace during the production process of long profiles, there are still problems such as high investment in equipment, large power consumption in production, combustion, and oxidation loss when using induction heating.

The Chinese patent application number 201220380196.8 discloses a continuous casting and rolling device for producing long products. According to the patent, the device includes a continuous casting machine, a roller hearth heating furnace is closely connected to the cutting machine, and a traverse device And a rolling mill capable of low temperature rolling. Although the invention patent changes the traditional heating furnace into a roller hearth heating furnace, it can only heat the lower surface of the slab, which can easily cause the temperature of the slab to be uneven. Therefore, it is necessary to build a supplementary heating furnace, which increases the process and increases Large equipment investment and energy consumption.

The Chinese patent application number 201320582646.6 discloses a device for producing steel bars by directly rolling billets at low temperature without heating. The end of the billet roller table is equipped with a blending device that can adjust the billets horizontally. On the side opposite to the billet roller table, there are several rolling lines. The billet roller table and the conveying roller table are equipped with heat preservation covers. Although the patent cancels the heating furnace, the device uses multiple rows of continuous casting slabs in parallel. After the steel is divided by the horizontal allocation device, a single piece is sent to the hot delivery roller table, which will cause the continuous casting slabs entering the hot delivery roller table to wait. The temperature is lowered in the process of time, and the cooling time of the continuous casting slab is also increased due to the need to traverse the steel. Essentially, this device is not fundamentally different from the currently commonly used hot-feeding and hot-charging technology, and the temperature drop of the continuous casting slab is too large to meet the rolling requirements of the rolling mill.

Contents of the invention

In view of the deficiencies in the prior art described above, the purpose of the present invention is to provide a high-speed direct-feeding and direct-rolling system for continuous casting slabs of wire and rod, which can maximize the temperature when the slabs are cut off, and shorten the time from continuous casting to rolling of the slabs. Time, reducing the temperature loss of the slab during transportation.

In order to achieve the above-mentioned purpose and other related purposes, the technical solution of the present invention is as follows:

A high-speed direct-feeding and direct-rolling system for continuous casting slabs of wire and rod, including a small-radius high-speed continuous casting machine, a rapid hydraulic shear, a post-cutting roller table, a billet discharge roller table, and a grouped hot-feeding roller table for billets 1. A single slab conveying roller table and a wire and bar rolling mill; a horizontal steel transfer machine is arranged between the billet discharge roller table and the grouped hot-sending roller table, and the grouped hot-sent roller table is connected to the single There is a steel separating machine between the root casting slab conveying roller tables. The casting slabs are assembled into groups on the slab discharge roller table and moved into the grouped hot delivery roller table by the horizontal steel transfer machine. The grouped slabs are divided into single groups The cast slab is transported to the wire and bar rolling mill through a single slab conveying roller table for rolling.

With the above structure, the small-radius high-speed casting machine has the characteristics of small radius, short metallurgical length, and high casting speed, usually with a radius of less than 8m; fast hydraulic shears are installed closely downstream of the small-radius high-speed continuous casting machine to minimize The distance between the tension leveler and the fast hydraulic shear increases the temperature when the slab is sheared; the fast hydraulic shear cuts the continuous casting slab synchronously online, which is fast and convenient, with fast shearing speed, high shearing success rate, low equipment failure rate, and the shearing incision is not regular. Affecting slab rolling, conventional flame cutting takes one or two minutes, while fast hydraulic shearing only takes a few seconds, which shortens the shearing time and reduces the temperature drop. At the same time, the casting slabs are arranged together in the area of the slab discharge roller table, and the casting slabs are also arranged in groups in the process of moving the slabs into the grouped hot-sending roller table and on the slab grouped hot-sending roller table. Group, which can make the billet cool down slowly, reduce temperature loss, and ensure the temperature during subsequent rolling.

Further, the grouped hot-feeding roller table is arranged on the side of the billet roller table, and the transverse steel transfer machine is arranged above the billet roller table.

Further, a gate mechanism for blocking the entry and release of the slab is provided between the billet discharge roller table and the post-cutting roller table. When the gate is raised, it can prevent the slab from entering the billet roller table, and when it is lowered, the slab in its current flow is allowed to enter the billet roller table, so as to play the role of orderly adjustment of the billet transportation.

Further, a fixed baffle plate for blocking the billet in the area of the billet roller table is also provided in front of the billet roller table, the front is the front relative to the moving direction of the billet, and the rear of the billet roller table is a gate mechanism.

Further, the gate mechanism is a lifting baffle driven by hydraulic pressure or pneumatic pressure.

Further, the radius of the small-radius high-speed casting machine is 6m-8m; the casting speed is greater than 4m/min. The small-radius high-speed continuous casting machine is equipped with a high-speed mold with a casting speed greater than 4m/min. The high-speed mold has a low-resistance cavity structure, efficient cooling water slots, and a unique corner structure of the copper tube to ensure that the casting billet is Uniform cooling in the mold and shell thickness of the slab out of the mold. Equipped with a cooling system to ensure that the temperature of the slab before cutting is greater than 980°C, the shape of the slab is regular, and the surface quality is excellent.

Further, the post-cutting roller table, billet discharge roller table, cast billet group hot delivery roller table, and single cast billet conveying roller table are high-speed roller tables, which can adopt frequency conversion or non-frequency conversion.

Further, the high-speed continuous casting machine is equipped with a cooling spray device, including a spray mechanism and a water inlet main pipe as a fixed bracket. On the main pipe, it is connected with the water inlet pipe; the water inlet pipe is divided into several sections along the arc direction of the casting stream, and the section arrangement is convenient for replacement and maintenance; each section is provided with water inlets at the upper and lower ends. Each section is a spray area, and each area adopts the method of passing water through the upper and lower water inlets at the same time to avoid uneven distribution of cooling water up and down.

With the above-mentioned structure, the damage to the bracket is small when the continuous casting machine has steel leakage and other accidents, and it does not affect the reorganization of production of the continuous casting machine.

Further, the spraying mechanism is a nozzle ring group, the plane where the nozzle ring group is located is perpendicular to the casting strand, and the casting strand passes through the middle of the nozzle ring group, the nozzle ring group is connected to the main water inlet through a connecting pipe, and the nozzle ring Multiple nozzles are mounted on the group.

Further, the nozzle ring group has an octagonal structure, including 4 long pipes and 4 short pipes connected alternately. The long pipes near the inner arc side are connected to the water inlet main pipe through the connecting pipe, and the nozzles are installed on the short pipes. superior.

Furthermore, the included angle between the short tube and the long tube is 120°.

Further, the nozzle ring group is an octagonal structure composed of 8 nozzles of equal length, the nozzles are installed on the nozzles at intervals, and the nozzles are connected to the water inlet main pipe through a connecting pipe.

Further, the nozzle is threadedly connected to the nozzle ring set, and the connecting pipe is inserted into the water inlet main pipe and the nozzle ring set.

The structure is simple, the nozzle ring group is easy to install and disassemble, the components are integrated and highly integrated, and the rapid replacement of the nozzle is realized.

Further, the hole diameter of the nozzle is greater than or equal to 2mm. It is suitable for a wide range of water quality, not easy to be blocked, the nozzle atomization effect is good, and the spraying speed is fast.

The present invention also provides a high-speed direct-feeding and direct-rolling method for continuous casting slabs for wire and rod, including the above-mentioned high-speed direct-feeding and direct-rolling system for continuous casting slabs for wire and rods. After shearing and cutting, it is sent from the cutting roller table to the billet discharge roller table, and a gate mechanism is set between the billet discharge roller table and the post-cutting roller table to block the entry and release of the billet, which is used for the orderly adjustment of the billet transportation, and the billet discharge A fixed baffle is set on one side of the roller table to block the billet in the billet discharge roller table area; after the billet is assembled into a group in the billet discharge roller table area, it is moved into the cast billet group hot delivery roller table by a horizontal steel transfer machine to reduce heat loss. The grouped slabs are divided into single slabs by the steel splitter and transported to the wire bar rolling mill through the single slab conveying roller table for heating-free rolling.

Further, the radius of the small-radius high-speed continuous casting machine is 6m-8m; the casting speed is greater than 4m/min; the temperature of the slab before cutting is controlled by the continuous casting machine to be greater than 980°C. The conveying time is shortened by high casting speed and high-speed roller table, and the temperature drop is reduced; the cast slabs are conveyed in groups after the billet roller table, which can also reduce temperature loss and ensure rolling quality.

As mentioned above, the beneficial effects of the present invention are:

Small-radius high-speed continuous casting machine for high-efficiency continuous casting, high billet drawing temperature, regular shape, small temperature loss, fast shearing of billet, and high initial temperature of billet. The horizontal steel transfer machine groups the cast slabs into groups at high speed, and sends them to the rolling steel in groups through the hot-feeding roller table. The temperature drop of the cast slabs in this way is extremely small during transportation, and the operation is simple and easy to organize production. The rolled steel billet arrives at a high temperature, so it can be rolled directly without heating, and has little damage to the rolling mill. The invention maximizes the temperature when the slab is cut, shortens the time from continuous casting to rolling of the slab to the greatest extent, reduces the temperature loss of the slab during transportation to the greatest extent, and makes full use of the continuous casting slab metallurgical Heat energy greatly reduces the energy consumption of casting slabs in the transportation process, improves the finished product rate, saves metal consumption, shortens the production cycle, simplifies the production process, reduces the workshop area and transportation equipment, saves production costs and infrastructure investment, and improves product quality. Through the cooling spray device, it avoids the problem of uneven water spray volume of nozzles on the traditional billet secondary cooling spray bar, and prevents the damage to the spray system caused by steel breakout accidents; the nozzle ring group is convenient and quick to disassemble , accurate positioning, greatly saving maintenance time, improving the labor intensity of maintenance operators; maximally improving the operating rate of the billet continuous casting machine, uniform cooling of the billet, improving the quality of the billet, and providing high-speed casting for the billet Guaranteed to achieve high efficiency and high yield.

Description of drawings

Fig. 1 is the top view of the arrangement structure of the high-speed direct-feeding direct-rolling system of the continuous casting billet of wire and rod of the present invention;

Fig. 2 is the front view of the arrangement structure of the high-speed direct-feeding direct-rolling system for the continuous casting billet of wire and rod of the present invention;

Fig. 3 is the schematic diagram of the installation of the horizontal steel moving machine, the billet roller table, the lifting baffle and the fixed baffle of the present invention;

Fig. 4 is the structural representation of cooling spray device of the present invention;

Fig. 5 is a structural schematic diagram of the nozzle ring group of the present invention;

Fig. 6 is another structural schematic diagram of the nozzle ring set of the present invention.

Part number description

1 Small radius high casting speed continuous casting machine

2 fast hydraulic shears

3 roller table after cutting

4 lift baffle

5 Exit roller table

6 Horizontal steel moving machine

7 Fixed bezel

8 billet group hot delivery roller table

9 points steel machine

10 single slab conveying roller table

11-wire bar mill

12 Inlet supervisor

13 nozzle ring set

131 long tube

132 short tube

133 Nozzles

134 nozzle

14 connecting tube

15 water inlet

16 Strand

Detailed ways

The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

Example

As shown in Figure 1 and Figure 2, a high-speed direct-feeding and direct-rolling system for continuous casting of wire and rod is mainly used in the production process of wire and rod, including small-radius high-speed continuous casting machines 1, Rapid hydraulic shear 2, post-cutting roller table 3, billet discharge roller table 5, cast slab group hot delivery roller table 8, single slab conveying roller table 10 and wire bar rolling mill 11; A horizontal steel transfer machine 6 or lateral shifting device is arranged between the grouped hot-sending roller tables 8, and a steel separator 9 is arranged between the grouped hot-sent roller table 8 and the single slab conveying roller table 10. The slabs are assembled into a group on the billet discharge roller table 5 and moved into the grouped hot delivery roller table 8 by the horizontal steel transfer machine 6, and the grouped slabs are divided into single slabs by the steel separator 9 and conveyed by a single slab conveying roller The track 10 is conveyed to a wire rod mill 11 for rolling.

Among them, the radius of small-radius high-speed continuous casting machine 1 is 6m-8m; the casting speed is greater than 4m/min. The high-speed casting mold has a low-resistance cavity structure, high-efficiency cooling water slots, and a unique corner structure of the copper tube to ensure uniform cooling of the slab in the mold and the thickness of the shell of the slab out of the mold. Equipped with a cooling system to ensure that the temperature of the slab before cutting is greater than 980°C, the shape of the slab is regular, and the surface quality is excellent. Install fast hydraulic shears 2 closely downstream of small-radius high-speed casting machine 1, minimize the distance between the tension leveler and fast hydraulic shears 2, and increase the temperature when the slab is sheared; fast hydraulic shears 2 online synchronous shear continuous casting billet, fast and convenient, fast shearing speed, high shearing success rate, low equipment failure rate, regular shearing incision does not affect casting billet rolling, conventional flame cutting takes one or two minutes, while fast hydraulic shear 2 only takes a few seconds , shorten the shearing time and reduce the temperature drop.

Wherein the roller table 3 after cutting is a high-speed roller table, adopts frequency conversion or non-frequency conversion, and can send the billet to the billet discharge roller table 5 at high speed. The billet roller table 5 is also a high-speed roller table, adopts frequency conversion or non-frequency conversion, and the cast slabs can be assembled into a group at the billet discharge roller table 5 and moved into the grouped hot delivery roller table 8 by the high-speed horizontal steel transfer machine 6 . The area where the billet roller table 5 is located forms a buffer area for the billet. The billet hot delivery roller table 8 in groups is arranged on the side of the billet roller table 5, and the high-speed lateral steel transfer machine 6 is installed above the area of the billet roller table 5, and the billets on the billet roller table 5 can be moved in groups to The high-speed cast billets are grouped and hot-delivered on the roller table 8. The casting slabs are grouped and heated and sent to the roller table 8, which is also a high-speed roller table, which adopts frequency conversion or non-frequency conversion, and can heat the slabs in groups to the fast steel separator 9 at a high speed.

The cast slabs are arranged together in the area of the slab discharge roller table 5, and the cast slabs are also grouped in the process of moving the slabs into the slab hot delivery roller table 8 and on the slab hot delivery roller table 8. Multiple strands are grouped, which can slow down the temperature of the slab, reduce temperature loss, and ensure the temperature during subsequent rolling.

As further shown in Figure 3, in order to facilitate the management of the slab and the orderly adjustment of transportation, a gate mechanism for blocking the entry and release of the slab is provided between the area of the billet roller table 5 and the post-cutting roller table 3. When the gate is raised, it can prevent the slab from entering the billet roller table 5, and when it is lowered, the slab in its current flow is allowed to enter the billet roller table 5, so as to play the role of orderly regulation of the billet transportation. A fixed baffle plate 7 for blocking the billet in the area of the billet roller table 5 is also arranged in front of the billet roller table 5, the front is the moving direction of the billet billet, and the rear of the billet roller table 5 is a gate mechanism.

In this example, the gate mechanism is preferably a lift baffle 4 driven by hydraulic pressure or air pressure, which is convenient for remote operation and control. Among them, the roller table 3 after cutting, the roller table 5 for billet discharge, the roller table 8 for hot delivery of billets in groups, and the roller table 10 for single billet conveying are high-speed roller tables, and the speed can be controlled at 30-60m/min.

After the slab is pulled out at a high speed, the high-temperature slab is cut according to a certain length by the fast hydraulic shear 2, and then enters the post-cutting roller table 3, and the lifting baffle is released to enter the slab according to the number of slabs in groups. The roller table 5 and the high-speed horizontal steel transfer machine 6 quickly move the billet to the high-speed billet group hot delivery roller table 8 and transport it to the rolling workshop in groups, and then the steel splitter 9 divides the billets into single billets and sends them to the rolling mill for heating-free rolling. The invention is based on increasing the casting speed and increasing the temperature of the slab exiting the continuous casting machine; the sheared high-temperature slab is transported into a group at high speed and sent to rolling, and the temperature loss in the whole process is controlled within the range of less than 50°C.

As further shown in Figures 4 and 5, the small-radius high-speed casting machine 1 is provided with a cooling spray device, which includes a spray mechanism and a water inlet main pipe 12. In this example, the water inlet main pipe 12 serves as a fixed bracket at the same time The key to supporting the spraying mechanism is that the main water inlet 12 is located on the inner arc side of the casting stream 16, and the spraying mechanism is used for secondary cooling of the slab, which is installed on the main water inlet 12 and communicated with the main water inlet 12 .

Since the water inlet main pipe 12 is located on the inner arc side, the damage to the water inlet main pipe 12 is small when accidents such as steel leakage occur in the continuous casting machine, which does not affect the reorganization of production of the continuous casting machine, and is easy to install and disassemble. Capable of cooling and not easily deformed.

Further, the water inlet main pipe 12 is divided into multiple sections along the arc direction of the casting strand 16, and each water inlet main pipe 12 section is provided with water inlets 15 at the upper and lower ends. Arranged in sections, when a problem occurs in a certain section, it is convenient for a single section to be removed for maintenance or replacement without dismantling or replacing the entire mechanism. Each segment is a spraying area, and each area adopts the mode of passing water through the upper and lower water inlets 15 at the same time, so as to avoid uneven distribution of cooling water up and down.

As further shown in Figure 5, the spray mechanism is a nozzle ring group 13, the plane where the nozzle ring group 13 is located is perpendicular to the casting strand 16, the nozzle ring group 13 is distributed from dense to thin along the strand flow direction, and the casting strand 16 is formed by the nozzle ring group 13 passes through the middle, and multiple nozzles 133 are installed on the nozzle ring group 13. The nozzle ring group 13 has an octagonal structure, including four long tubes 131 and four short tubes 132 connected alternately, and two tubes near the inner arc side The long pipe 131 is connected to the water inlet main pipe 12 through a Y-shaped connecting pipe 14, and the connecting pipe 14 is divided into two channels to communicate with the long pipe 131 to ensure the uniformity of the water outlet. The nozzle 133 is installed on the short pipe 132, and the short pipe 132 The included angle with the long pipe 131 is 120°.

As shown in Figure 6, the nozzle ring group can also be composed of 8 nozzle pipes 134 of equal length to form a regular octagonal structure. The connecting pipe 14 is also Y-shaped and connected to the nozzle pipes 134 in two ways, and the nozzles 133 are installed in it. The four nozzles 134 are arranged at intervals, and the angle between adjacent nozzles 134 is 120°.

Further, in order to facilitate the installation and disassembly of the nozzle ring set 13 , the nozzle 133 is threadedly connected with the nozzle ring set 13 , and the connecting pipe 14 is inserted into the water inlet main pipe 12 and the nozzle ring set 13 . The plug-in connection can adopt the commonly used butt joint method of male and female joints, the structure is simple, the nozzle ring group 13 is easy to install and disassemble, and the components have a high degree of integrity and integration, which realizes the rapid replacement of the nozzle 133 . The hole diameter of the nozzle 133 is greater than or equal to 2 mm. It is suitable for a wide range of water quality and is not easy to be blocked. The nozzle 133 has a good atomization effect and a fast spraying speed.

The above-mentioned spraying device improves the operating rate of the billet continuous casting machine to the greatest extent, and the billet is cooled evenly, which improves the quality of the billet; avoids the unevenness of the nozzle water spray volume on the traditional billet secondary cooling spray bar. and the problem of damage to the sprinkler system caused by steel leakage accidents; the structure is simple, the disassembly and assembly of the nozzle ring group 13 is convenient, fast, and the positioning is accurate, which can greatly save maintenance time and improve the labor intensity of maintenance operators; The water main pipe 12 is fixed on the inner arc side, is not easily deformed, is not affected by steel leakage accidents, and has a longer service life. The fixed bracket comes with water cooling, which is not easy to deform and has a long service life. It provides a guarantee for the high casting speed of the billet and realizes the purpose of high efficiency and high production.

The present invention also provides a high-speed direct-feeding and direct-rolling method for continuous casting slabs of wire and rods. The above-mentioned high-speed direct-feeding and direct-rolling system for continuous casting slabs of wire and rods is adopted, and the slabs produced by the small-radius high-speed casting machine 1 are processed rapidly. After cutting, the hydraulic shear 2 is sent from the cut roller table 3 to the billet discharge roller table 5, and a gate mechanism is set between the billet discharge roller table 5 and the cut roller table 3 to prevent the slab from entering and releasing, which is used for the transportation of the slab Sequence adjustment, a fixed baffle plate 7 is set on one side of the billet roller table 5 to block the casting slab in the area of the billet roller table 5; Grouped hot delivery roller tables 8 reduce heat loss. Grouped billets are divided into single billets by the steel splitter 9 and transported to the wire and bar rolling mill 11 through the single billet conveying roller table 10 for heating-free rolling .

Among them, the radius of the small-radius high-speed continuous casting machine 1 is 6m-8m; the casting speed is greater than 4m/min; the temperature of the slab before cutting is controlled by the continuous casting machine to be greater than 980°C. The high-temperature slabs after shearing are collected and conveyed in groups at high speed and sent to steel rolling, and the temperature loss during the whole process is controlled within the range of less than 50°C. The conveying time is shortened by high casting speed and high-speed roller table, and the temperature drop is reduced; the casting billet is conveyed in groups after the billet roller table 5, which can also reduce the temperature loss and ensure the rolling quality.

Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (8)

1. A high-speed direct-feeding and direct-rolling system for continuous casting billets of wire and rod, which is characterized in that: it includes a high-speed continuous casting machine, a fast hydraulic shear, a roller table after cutting, a billet discharge roller table, and a group of billets Hot delivery roller table, single slab conveying roller table and wire bar rolling mill; a gate mechanism for blocking the entry and release of cast slab is set between the billet discharge roller table and the post-cutting roller table; the billet discharge roller table A horizontal steel transfer machine is arranged between the grouped hot-sending roller table and the cast slab, and a steel separator is arranged between the grouped hot-sent roller table and the single slab conveying roller table. The roads are assembled into a group and moved into the grouped hot delivery roller table by the horizontal steel transfer machine. The grouped slabs are divided into single slabs by the steel splitter and transported to the wire bar mill for rolling through the single slab conveying roller table. system; the front of the billet roller table is also provided with a fixed baffle for blocking the billet in the area of the billet roller table. 2. A high-speed direct-feeding and direct-rolling system for continuous casting slabs for wire and rod according to claim 1, characterized in that: the grouped hot-feeding roller table is arranged on the side of the billet discharge roller table, and the lateral shift The steel machine is arranged above the billet roller table. 3. A high-speed direct-rolling system for wire and rod continuous casting slabs according to claim 1, characterized in that: the gate mechanism is a lifting baffle driven by hydraulic pressure or air pressure. 4. A high-speed direct-feeding and direct-rolling system for wire and rod continuous casting slabs according to claim 1, characterized in that: the radius of the high-speed continuous casting machine is 6m-8m; the casting speed is greater than 4m/min; The roller table after cutting, billet discharge roller table, casting billet group hot delivery roller table, and single casting billet conveying roller table are frequency conversion roller table. 5. A high-speed direct-feeding and direct-rolling system for wire and rod continuous casting slabs according to claim 1, characterized in that: the high-speed casting machine is provided with a secondary cooling spray device, including a spray mechanism and a The water inlet main pipe of the fixed bracket, the water inlet main pipe is located on the inner arc side of the casting strand, the spray mechanism is installed on the water inlet main pipe, and communicated with the water inlet main pipe; the water inlet main pipe is along the arc direction of the casting strand Divided into multiple segments, each segment is provided with water inlets at the upper and lower ends. 6. A high-speed direct-feeding and direct-rolling system for wire and rod continuous casting slabs according to claim 5, characterized in that: the spraying mechanism is a nozzle ring group, and the plane where the nozzle ring group is located is perpendicular to the casting stream, and The casting strand passes through the middle of the nozzle ring group, and multiple nozzles are installed on the nozzle ring group. The nozzle ring group has an octagonal structure, and the nozzles are installed on the nozzle at intervals. Water main connection. 7. A method for high-speed direct-feeding and direct-rolling of continuous casting slabs for wire and rods, using the high-speed direct-feeding and direct-rolling system for continuous casting slabs for wire and rods according to any one of claims 1-6, characterized in that: high-speed continuous casting The cast slab produced by the casting machine is sent to the billet discharge roller table by the cutting roller table after being cut by rapid hydraulic shearing. The orderly adjustment of billet transportation, a fixed baffle is set on one side of the billet roller table to block the casting billet in the billet roller table area; after the billet is assembled into a group in the billet roller table area, it is moved into the casting billet by a horizontal steel transfer machine Grouped hot-feeding roller tables reduce heat loss. The grouped slabs are divided into single slabs by the steel separator and transported to the wire and bar rolling mill for heat-free rolling through the single slab conveying roller table. 8. A high-speed direct-feeding and direct-rolling method for wire and rod continuous casting slabs according to claim 7, characterized in that: the radius of the high-speed continuous casting machine is 6m-8m; the casting speed is greater than 4m/min; The pulling speed continuous casting machine controls the temperature of the slab before cutting to be greater than 980°C.