Back-to-back double-rack two-roller roughing mill

Abstract

The utility model provides a back-to-back double-rack two-roller roughing mill, which comprises an E1 vertical rolling mill, an R1 rolling mill, an R2 rolling mill and an E2 vertical rolling mill which are arranged in sequence, the R1 rolling mill is opposite to the R2 rolling mill in roll hole pattern, a guide and guard device is arranged between the R1 rolling mill and the R2 rolling mill, and the guide and guard device is used for aligning a plate blank guided out by the R1 rolling mill to smoothly guide the plate blank into the R2 rolling mill; and high-pressure water dephosphorization devices are mounted on the inlet side of the E1 vertical rolling mill and the outlet side of the E2 vertical rolling mill. According to the method, the distance between the rolling mills is greatly shortened, the rolling rhythm is accelerated, the generation of plate blank iron dioxide is reduced, and the surface quality and the yield of the plate blank are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of hot rolling equipment for steel, and in particular to a back-to-back double-stand two-roll roughing mill. Background Technology

[0002] The roughing mill for plate is an important metallurgical rolling equipment that provides intermediate billets with high dimensional accuracy, high surface quality, and high performance microstructure to intermediate or finishing mills in plate production. It is also a key piece of equipment for improving the output and efficiency of the entire plate rolling mill and production line.

[0003] Chinese invention patent application CN200910104025.5 discloses an intermediate billet cooling system and its cooling control process. The intermediate billet cooling system includes an aerosol cooling device body located between the roughing mill and the finishing mill. The aerosol cooling device body consists of an upper cooling manifold and a lower cooling manifold. Aerosol nozzles and compressed air pipes are installed on the cooling water pipes of both the upper and lower cooling manifolds. The opening / closing control valves and flow control valves of the cooling water pipes and compressed air pipes are connected to a control valve station. The cooling manifolds, located near the roller table before and after the mill, control the aerosol cooling process of the intermediate billet using a water mist spraying technology. This invention offers rapid cooling without altering the metal properties, a wide adjustable water volume range, and continuous water volume adjustment, allowing for precise control of the intermediate billet cooling rate. It can be widely used in medium and heavy plate production lines.

[0004] Chinese invention patent application CN202010661058.6 discloses a compact double-stand plate roughing mill and its rolling method. The roughing mill includes, in sequence, an inlet roller table, an inlet pusher, an inlet mill laminar flow and descaling device, a first horizontal roughing mill, a vertical roll mill, an intermediate roller table, a second horizontal roughing mill, an outlet mill laminar flow and descaling device, an outlet pusher, and an outlet roller table. The rolling method includes heating, slab oxide removal, intermediate slab rolling, and intermediate or finishing rolling. This invention, through reasonable equipment configuration and process flow, simplifies and shortens the length of the plate roughing production line, reduces the time spent in the plate roughing stage, improves the plate roughing efficiency, makes the roughing slab shape and dimensional quality more stable, and greatly increases the production scale. This invention greatly simplifies the length of the roughing mill and its inlet, outlet, and intermediate rollers, shortens the length of the roughing production line, reduces the plant investment occupied by the roughing mill and its rollers, and saves space.

[0005] The above schemes are all traditional R1 mill + intermediate roller table + R2 mill layouts. This configuration results in excessive slab temperature drop due to the large distance between the R1 mill and R2 mill, and produces a lot of secondary iron oxide scale, which has a significant impact on the rolling rhythm and steel plate surface quality, and cannot meet the user's requirements. Utility Model Content

[0006] This utility model provides a back-to-back double-stand two-roll roughing mill, which greatly shortens the distance between the mills, speeds up the rolling process, reduces the generation of iron dioxide scale on the slab, and improves the surface quality and yield of the slab.

[0007] The technical problem to be solved is that the traditional layout of R1 mill + intermediate roller table + R2 mill is too large. This layout results in excessive temperature drop of the slab due to the large distance between the R1 mill and R2 mill, and produces a lot of secondary iron oxide scale, which has a significant impact on the rolling rhythm and the surface quality of the steel plate and cannot meet the user's requirements.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] This utility model discloses a back-to-back double-stand two-roll roughing mill, comprising an E1 vertical roll mill, an R1 mill, an R2 mill, and an E2 vertical roll mill arranged sequentially. The roll passes of the R1 mill and the R2 mill are opposite to each other. A guide device is installed between the R1 mill and the R2 mill. The guide device is used to center the slab exiting the R1 mill and smoothly guide the slab into the R2 mill.

[0010] High-pressure water descaling devices are installed on the inlet side of the E1 vertical rolling mill and the outlet side of the E2 vertical rolling mill.

[0011] By adopting the above scheme, this application uses a novel back-to-back double-stand arrangement, which greatly shortens the overall length of the rolling line, minimizes the temperature loss of the slab in the rough rolling area, and reduces the generation of secondary iron oxide scale on the slab; in addition, the high-pressure water descaling of the front and rear vertical rollers improves the surface quality and yield of the slab, while greatly accelerating the rolling pace, playing a key role in increasing the production and efficiency of steel mills.

[0012] This utility model discloses a back-to-back double-stand two-roll roughing mill, wherein the distance between the E1 vertical roll mill and the R1 roll mill is 3720mm.

[0013] This utility model discloses a back-to-back double-stand two-roll roughing mill, wherein the distance between the R1 mill and the R2 mill is 5740mm.

[0014] This utility model discloses a back-to-back double-stand two-roll roughing mill, wherein the distance between the R2 mill and the E2 vertical roll mill is 3720mm.

[0015] By adopting the above scheme and arrangement, the distance between rolling mills is greatly shortened, the temperature loss of slabs in the roughing zone is minimized, and the generation of secondary iron oxide scale on slabs is reduced.

[0016] This utility model discloses a back-to-back double-stand two-roll roughing mill, wherein the R1 mill and the R2 mill are connected to the foundation by anchor bolts.

[0017] This utility model discloses a back-to-back double-stand two-roll roughing mill. Furthermore, the E1 vertical roll mill and the E2 vertical roll mill are connected to the foundation by a base and bolts.

[0018] By adopting the above scheme, the stability and rolling accuracy during the operation of the rolling mill are guaranteed.

[0019] This utility model discloses a back-to-back double-stand two-roll roughing mill. Furthermore, the high-pressure water descaling device is respectively integrated on the archway of the E1 vertical rolling mill and the E2 vertical rolling mill.

[0020] By adopting the above scheme, the space occupied by the high-pressure water descaling device is reduced, and the temperature loss of the slab in the rough rolling area is further shortened.

[0021] This utility model discloses a back-to-back double-stand two-roll roughing mill. Furthermore, the roll holes of the E1 vertical roll mill, R1 roll mill, R2 roll mill, and E2 vertical roll mill are located on the same horizontal plane and the hole types correspond one-to-one.

[0022] By adopting the above scheme, the slab can be directly fed into the next rolling mill after being rolled by the rolling mill, which greatly shortens the overall length of the rolling wire and minimizes the temperature loss of the slab in the rough rolling area.

[0023] Compared with the prior art, this utility model has the following advantages:

[0024] This application adopts a novel back-to-back double-stand arrangement, which greatly shortens the overall length of the rolling line, minimizes the temperature loss of the slab in the rough rolling area, and reduces the generation of secondary iron oxide scale on the slab. In addition, the high-pressure water descaling of the front and rear vertical rollers improves the surface quality and yield of the slab, while greatly accelerating the rolling pace, playing a key role in increasing the production and efficiency of steel mills.

[0025] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure label:

[0028] 1. E1 vertical rolling mill; 2. R1 rolling mill; 3. R2 rolling mill; 4. E2 vertical rolling mill; 5. Guide device; 6. High-pressure water descaling device. Detailed Implementation

[0029] like Figure 1As shown, this utility model discloses a back-to-back double-stand two-high roughing mill. The back-to-back double-stand two-high mill is arranged in the roughing zone and includes an E1 vertical roll mill 1, an R1 mill 2, an R2 mill 3, and an E2 vertical roll mill 4 arranged side by side. The roll passes of the R1 mill 2 and the R2 mill 3 are opposite each other. A guide device 5 is installed between the R1 mill 2 and the R2 mill 3. The guide device 5 is a device installed before and after the roll pass during slab rolling to help the slab accurately and stably enter and exit the pass in a predetermined direction and state. It is prior art and will not be described in detail in this application embodiment. A high-pressure water descaling device 6 is installed on the inlet side of the E1 vertical roll mill 1 and the outlet side of the E2 vertical roll mill 4. The high-pressure water descaling device 6 is prior art and will not be described in detail in this application. The high-pressure water descaling device 6 uses high-pressure water to spray the surface of the rolled piece, and removes the iron oxide scale on the surface of the rolled piece by the impact force of the high-pressure water. The roll holes of E1 vertical rolling mill 1, R1 rolling mill 2, R2 rolling mill 3 and E2 vertical rolling mill 4 are located on the same horizontal plane and the hole types correspond one-to-one.

[0030] After the slab is heated to the qualified temperature in the heating furnace, it is conveyed to the front of the E1 vertical rolling mill 1 via the roller conveyor for high-pressure water descaling. After descaling, the slab is processed by the E1 vertical rolling mill 1 and then sent to the R1 rolling mill 2 for rolling. After that, it is sent to the R2 rolling mill 3 via the guide device 5 and finally returned to the R2 rolling mill 3 for 3-5 reversible rolling cycles.

[0031] This application adopts a novel back-to-back double-stand arrangement, which greatly shortens the overall length of the rolling line, minimizes the temperature loss of the slab in the rough rolling area, and reduces the generation of secondary iron oxide scale on the slab. In addition, the high-pressure water descaling of the front and rear vertical rollers improves the surface quality and yield of the slab, while greatly accelerating the rolling pace, playing a key role in increasing the production and efficiency of steel mills.

[0032] Furthermore, in this embodiment, the distance between the E1 vertical rolling mill 1 and the R1 rolling mill 2 is 3720 mm; the distance between the R1 rolling mill 2 and the R2 rolling mill 3 is 5740 mm; and the distance between the R2 rolling mill 3 and the E2 vertical rolling mill 4 is 3720 mm. This arrangement significantly shortens the distance between the rolling mills, minimizing temperature loss in the roughing zone of the slab and reducing the generation of secondary iron oxide scale on the slab.

[0033] R1 mill 2 and R2 mill 3 are connected to the foundation by anchor bolts; E1 vertical mill 1 and E2 vertical mill 4 are connected to the foundation by base and bolts to ensure the stability of the structure.

[0034] The high-pressure water descaling devices are respectively integrated on the arches of E1 vertical rolling mill 1 and E2 vertical rolling mill 4, reducing the space occupied by the high-pressure water descaling device 6 and further shortening the temperature loss of the slab in the rough rolling area.

[0035] This device greatly shortens the overall length of the rolling wire, minimizes the temperature loss of the slab in the roughing zone, reduces the generation of iron dioxide scale on the slab, and improves the surface quality and yield of the slab by installing a high-pressure water descaling device 6 on the front and rear vertical rolls. At the same time, it greatly speeds up the rolling pace, plays a key role in increasing the production efficiency of steel plants, saves steel plants land area and total investment, and has low maintenance costs.

[0036] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A back-to-back double-stand two-roll roughing mill, characterized in that: The assembly includes an E1 vertical rolling mill (1), an R1 rolling mill (2), an R2 rolling mill (3), and an E2 vertical rolling mill (4) arranged in sequence. The roll passes of the R1 rolling mill (2) and the R2 rolling mill (3) are opposite each other. A guide device (5) is installed between the R1 rolling mill (2) and the R2 rolling mill (3). The guide device (5) is used to center the slab exiting the R1 rolling mill (2) and smoothly guide the slab into the R2 rolling mill (3). High-pressure water descaling devices (6) are installed on the inlet side of the E1 vertical rolling mill (1) and the outlet side of the E2 vertical rolling mill (4).

2. The back-to-back double-stand two-high roughing mill according to claim 1, characterized in that: The distance between the E1 vertical rolling mill (1) and the R1 rolling mill (2) is 3270mm.

3. The back-to-back double-stand two-high roughing mill according to claim 1, characterized in that: The distance between the R1 mill (2) and the R2 mill (3) is 5740mm.

4. The back-to-back double-stand two-high roughing mill according to claim 1, characterized in that: The distance between the R2 mill (3) and the E2 vertical roll mill (4) is 3720mm.

5. A back-to-back double-stand two-high roughing mill according to claim 1, characterized in that: The R1 mill (2) and the R2 mill (3) are connected to the foundation by anchor bolts.

6. A back-to-back double-stand two-high roughing mill according to claim 1, characterized in that: The E1 vertical rolling mill (1) and the E2 vertical rolling mill (4) are joined together on the foundation by a base and bolts.

7. A back-to-back double-stand two-high roughing mill according to claim 1, characterized in that: The high-pressure water descaling devices are respectively mounted on the archways of the E1 vertical rolling mill (1) and the E2 vertical rolling mill (4).

8. A back-to-back double-stand two-high roughing mill according to claim 1, characterized in that: The roll holes of the E1 vertical roll mill (1), R1 roll mill (2), R2 roll mill (3) and E2 vertical roll mill (4) are located on the same horizontal plane and the hole types correspond one to one.

Images