Thin slab and conventional slab coupling production unit

Abstract

The utility model relates to a thin slab and conventional slab coupling production unit, which comprises a thin slab production unit, a conventional slab processing unit and a rolling unit, and the thin slab production unit comprises a thin slab continuous casting machine, a fixed section tunnel furnace and a movable tunnel furnace which are collinearly arranged in sequence; the conventional slab processing unit comprises an activity response device used for responding to the movable tunnel furnace to complete transfer of the thin slab to the conventional slab processing unit and a slab heating furnace connected to the upstream of the activity response device; the rolling unit comprises a rough rolling mechanism and a finish rolling mechanism; and the movable response device, the rough rolling mechanism and the finish rolling mechanism are collinearly arranged in sequence. Coupling production of a thin slab and a conventional slab can be achieved, and the process flexibility is high; the rolling unit and the conventional plate blank treatment unit are collinearly arranged, so that the layout reasonability is high, waste of a large amount of space can be avoided, and repeated impact of a high-speed plate blank on the movable tunnel furnace during reversible rough rolling is avoided; and the sheet billet can be roughly rolled or passes through the roughing mill according to the process condition, so that the process flexibility can be further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical production, and in particular relates to a production unit for coupling a thin slab with a conventional slab. Background Art

[0002] Continuous casting and rolling is a near-net-shape, short-process production process developed in the 1980s. Compared with conventional hot rolling, continuous casting and rolling has the advantages of high yield rate, large proportion of thin-gauge products, thinnest product specifications, high product dimensional accuracy, small unit footprint, low energy consumption per ton of steel, small exhaust gas emissions, small new water consumption, and low roller consumption. However, due to production process limitations, continuous casting and rolling production lines have great limitations in the production of high-performance steel grades such as ultra-deep drawing soft steel, high-grade non-oriented silicon steel, oriented silicon steel, and pipeline steel above X80; in addition, the output of continuous casting and rolling production lines is smaller than that of conventional hot rolling, resulting in high investment per ton of steel, and no obvious cost and energy consumption advantages. Although the continuous casting line can be mechanically coupled with the conventional hot rolling line, the process differences between the two production lines make it easy to affect normal production or cause production accidents after coupling. For example, when conventional slabs are continuously rough rolled, it is easy for the two production lines to have a large difference in length, resulting in poor coordination of equipment layout and a large waste of space. For example, when the roughing mill and the thin slab production line are on the same line and the conventional slabs are reversibly rough rolled, the high-speed slab will repeatedly impact the transverse tunnel furnace and cause damage to the furnace rollers, furnace shell, steel piling and other accidents. Utility Model Content

[0003] The utility model relates to a thin slab and a conventional slab coupling production unit, which can at least solve some defects of the prior art.

[0004] The utility model relates to a thin slab and conventional slab coupling production unit, comprising a thin slab production unit, a conventional slab processing unit and a rolling unit.

[0005] The thin slab production unit comprises a thin slab continuous casting machine, a fixed section tunnel furnace and a movable tunnel furnace which are arranged in sequence on the same line;

[0006] The conventional slab processing unit comprises a slab heating furnace and a movable response device for responding to the movable tunnel furnace to complete the transfer of the thin slab to the conventional slab processing unit, wherein the slab heating furnace is connected to the upstream of the movable response device;

[0007] The rolling unit comprises a rough rolling mechanism and a finishing rolling mechanism, wherein the active response device, the rough rolling mechanism and the finishing rolling mechanism are arranged in sequence on the same line.

[0008] As one of the embodiments, the movable tunnel furnace is a transverse section tunnel furnace, and the movable response device is a transverse section insulation roller, wherein the transverse section insulation roller is suitable for transverse movement to a side away from the thin slab production unit, and the transverse section tunnel furnace is suitable for transverse movement between the thin slab production unit and the conventional slab processing unit.

[0009] As one of the implementation modes, the transverse track of the transverse section tunnel furnace is connected in series with the transverse track of the transverse section insulation roller.

[0010] As one of the implementation modes, the rough rolling mechanism adopts a reversible rolling mill.

[0011] As one of the implementation modes, the rough rolling mechanism includes a rough rolling mill and a post-rough rolling insulation roller table arranged downstream of the rough rolling mill, and the rough rolling mill is arranged adjacent to the active response device.

[0012] As one of the implementation modes, there are two roughing mills, and the two roughing mills are arranged in series.

[0013] As one of the implementation modes, a hot coil box is further arranged between the rough rolling mechanism and the finishing rolling mechanism.

[0014] As one of the implementation modes, a shearing machine is further arranged between the rough rolling mechanism and the finishing rolling mechanism.

[0015] As one of the implementation modes, the discharge rollers of the slab heating furnace are co-linearly connected to the upstream of the active response device.

[0016] As one of the implementation modes, the slab heating furnace is a walking beam heating furnace.

[0017] The utility model has at least the following beneficial effects:

[0018] The utility model can realize the coupled production of thin slabs and conventional slabs, and has high process flexibility; the rolling unit and the conventional slab processing unit are arranged in the same line, and the layout is highly reasonable, which can avoid a lot of space waste and avoid the repeated impact of the high-speed slab on the movable tunnel furnace in the thin slab production unit during reversible rough rolling; at the same time, the thin slab production unit can share the rough rolling mechanism, and can choose to rough roll the thin slab or pass the rough rolling mill according to the process conditions, thereby further improving the process flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a thin slab and conventional slab coupling production unit provided in an embodiment of the utility model;

[0021] Figure 2 This is the application status diagram of the thin slab and conventional slab coupling production unit. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 and Figure 2 The embodiment of the utility model provides a thin slab and conventional slab coupling production unit, including a thin slab production unit 1, a conventional slab processing unit 2 and a rolling unit 3.

[0024] The thin slab production unit 1 comprises a thin slab continuous casting machine 11, a fixed section tunnel furnace 12 and a movable tunnel furnace 13 which are arranged in sequence in a co-linear manner;

[0025] The conventional slab processing unit 2 comprises a slab heating furnace 21 and a movable response device 22 for responding to the movable tunnel furnace 13 to complete the transfer of the thin slab to the conventional slab processing unit 2, wherein the slab heating furnace 21 is connected to the upstream of the movable response device 22;

[0026] The rolling unit 3 includes a rough rolling mechanism 31 and a finishing rolling mechanism 32 , wherein the active response device 22 , the rough rolling mechanism 31 and the finishing rolling mechanism 32 are arranged in sequence on the same line.

[0027] The conventional slab processing unit 2 is used to process conventional slabs, for example, to process medium-thick slabs with a thickness of 150 to 250 mm.

[0028] In one embodiment, if Figure 1 and Figure 2 , the slab running direction in the slab heating furnace 21 is perpendicular to the longitudinal direction of the conventional slab processing unit 2; the longitudinal direction of the conventional slab processing unit 2, i.e., the length direction of the conventional slab processing unit 2, corresponds to the slab running direction in the conventional slab processing unit 2. For this arrangement, optionally, the furnace discharge roller 211 of the slab heating furnace 21 is connected to the upstream of the active response device 22 in a colinear manner.

[0029] The slab heating furnace 21 is preferably a walking beam heating furnace, and one or more furnaces may be arranged.

[0030] The rough rolling mechanism 31 may include one or more rough rolling mills, preferably a reversible rolling mill; Figure 1 In the illustrated solution, two roughing mills are arranged in series; in another embodiment, the two roughing mills may be arranged at intervals, in which case, it is preferred to provide an intermediate heat-insulating roller conveyor between the two roughing mills.

[0031] As a preference, Figure 1 and Figure 2 The rough rolling mechanism 31 includes a rough rolling mill and a post-rough rolling insulation roller arranged downstream of the rough rolling mill. The rough rolling mill is arranged adjacent to the active response device 22. This arrangement structure can shorten the conveying time of the slab, especially the thin slab, reduce the temperature drop, and facilitate subsequent rolling.

[0032] In one embodiment, if Figure 1 and Figure 2 The movable tunnel furnace 13 is a transverse section tunnel furnace, and the movable response device 22 is a transverse section insulation roller, wherein the transverse section insulation roller is suitable for transverse movement to the side away from the thin slab production unit 1, and the transverse section tunnel furnace is suitable for transverse movement between the thin slab production unit 1 and the conventional slab processing unit 2.

[0033] After the heat-insulating roller in the transverse moving section moves to the side away from the thin slab production unit 1, a space for avoiding can be reserved, so that the tunnel furnace in the transverse moving section can move to the conventional slab processing unit 2 to complete the transverse feeding of the thin slab. In this thin slab transverse feeding scheme, since the thin slab is always transferred in the tunnel furnace and can directly enter the finishing unit in the next step, the temperature loss of the thin slab is small, which is beneficial to the subsequent finishing production.

[0034] In particular, the active response device 22 is a transverse section insulation roller, which avoids the use of a transverse tunnel furnace and can effectively prevent accidents such as damage to the furnace rollers, damage to the furnace shell, and steel piling caused by repeated impacts of the high-speed slab on the transverse tunnel furnace during reversible rolling of the roughing mill. The use of a transverse section insulation roller can better withstand such impacts.

[0035] Among them, a group of transverse moving tracks can be arranged for the transverse moving section insulation roller and the transverse moving section tunnel furnace to move transversely. The guiding stroke of the transverse moving track can meet the transverse moving requirements of the transverse moving section insulation roller and the transverse moving section tunnel furnace, that is, the transverse moving track of the transverse moving section tunnel furnace is connected in series with the transverse moving track of the transverse moving section unit.

[0036] In one embodiment, if Figure 1 and Figure 2A hot coil box 33 is also arranged between the rough rolling mechanism 31 and the finishing rolling mechanism 32. The hot coil box 33 can play the role of evenly heating and heat-insulating the rough rolling intermediate billet, better coordinating the upstream and downstream production pace, and improving production stability and smoothness.

[0037] Optionally, a shearing machine is arranged between the rough rolling mechanism 31 and the finishing rolling mechanism 32. The shearing machine includes but is not limited to a flying shear, which can be used to cut off the excess portion at the head and tail of the steel billet.

[0038] When the hot coil box 33 and the shearing machine are arranged at the same time, the shearing machine is preferably located downstream of the hot coil box 33.

[0039] Optionally, a pre-finishing descaling machine is further arranged at the inlet side of the finishing mill. When a shearing machine and a pre-finishing descaling machine are arranged at the same time, the pre-finishing descaling machine is preferably located downstream of the shearing machine.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thin slab and conventional slab coupling production unit, characterized in that: It includes thin slab production unit, conventional slab processing unit and rolling unit. The thin slab production unit comprises a thin slab continuous casting machine, a fixed section tunnel furnace and a movable tunnel furnace which are arranged in sequence on the same line; The conventional slab processing unit comprises a slab heating furnace and a movable response device for responding to the movable tunnel furnace to complete the transfer of the thin slab to the conventional slab processing unit, wherein the slab heating furnace is connected to the upstream of the movable response device; The rolling unit comprises a rough rolling mechanism and a finishing rolling mechanism, wherein the active response device, the rough rolling mechanism and the finishing rolling mechanism are arranged in sequence on the same line.

2. The thin slab and conventional slab coupling production unit according to claim 1, characterized in that: The movable tunnel furnace is a transverse section tunnel furnace, and the movable response device is a transverse section insulation roller, wherein the transverse section insulation roller is suitable for transverse movement to the side away from the thin slab production unit, and the transverse section tunnel furnace is suitable for transverse movement between the thin slab production unit and the conventional slab processing unit.

3. The thin slab and conventional slab coupling production unit according to claim 2, characterized in that: The transverse track of the transverse section tunnel furnace is connected in series with the transverse track of the transverse section heat preservation roller.

4. The thin slab and conventional slab coupling production unit according to any one of claims 1 to 3, characterized in that: The rough rolling mechanism adopts a reversible rolling mill.

5. The thin slab and conventional slab coupling production unit according to claim 1, characterized in that: The rough rolling mechanism comprises a rough rolling mill and a post-rough rolling heat preservation roller table arranged downstream of the rough rolling mill, and the rough rolling mill is arranged adjacent to the active response device.

6. The thin slab and conventional slab coupling production unit according to claim 5, characterized in that: There are two roughing mills, which are arranged in series.

7. The thin slab and conventional slab coupling production unit according to claim 1 or 5, characterized in that: A hot coil box is also arranged between the rough rolling mechanism and the finishing rolling mechanism.

8. The thin slab and conventional slab coupling production unit according to claim 1, characterized in that: A shearing machine is also arranged between the rough rolling mechanism and the finishing rolling mechanism.

9. The thin slab and conventional slab coupling production unit according to claim 1, characterized in that: The discharge rollers of the slab heating furnace are co-linearly connected to the upstream of the active response device.

10. The thin slab and conventional slab coupling production unit according to claim 1, characterized in that: The slab heating furnace is a walking beam heating furnace.

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