CN109530456B - A continuous casting billet hot feeding and off-line system - Google Patents

Abstract

The invention discloses a continuous casting billet hot feeding and off-line system, which includes a continuous casting machine billet discharging roller (1), a steel fishing machine (2), a hot feeding roller (3), and a warm feeding roller (4). ), the slab insulation bed (7) and the hot steel feeding roller table (10). The steel fishing machine (2) can transport the slab on the billet discharge roller table (1) of the continuous casting machine to the hot steel feeding roller table (3) Or on the warm conveying roller conveyor (4), the warm conveying roller conveyor (4) can transport the cast slab to the cast slab insulating bed (7), and the cast slab on the cast slab insulating bed (7) can be transported to the hot conveying roller conveyor. (3), the hot-feeding roller table (3) can transport the slab to the hot-feeding steel rolling roller table (10). The continuous casting billet hot feeding and off-line system can control the surface temperature of the slab at 550℃-650℃, which meets the requirements of the steel rolling process; in addition, it can buffer the slab during roll changes and minor failures on the steel rolling production line. Function, improve the hot delivery of cast slabs and reduce the direct roll-off of cast slabs.

Description

A continuous casting billet hot feeding and off-line system

Technical field

The invention relates to the technical field of continuous casting in steel production, specifically a continuous casting billet hot feeding and off-line system.

Background technique

With the development of the steel industry, steel companies are paying more and more attention to energy saving and consumption reduction. Among them, the hot charging process of continuous casting billets is a major measure for steel companies to save energy, reduce consumption, and improve output and quality. Its implementation is based on supporting equipment and the premise of obtaining high-temperature defect-free cast slabs. It is a comprehensive technology that integrates a series of technologies such as production planning, continuous casting production, slab transportation, heating and rolling, and scheduling management. Especially the matching and parallel flow at the interface between continuous casting and steel rolling are the key to realizing hot feeding process technology. Due to certain differences in the production rhythm and maintenance intervals of steel rolling and continuous casting machines, if the rolling roll is changed, the continuous casting billet usually needs to be taken off the line directly, which reduces the hot transfer rate; in addition, according to the characteristics of the steel type, different steel rolling requirements for certain steel types The hot transfer temperature requirements are different. For example, some steel types require a hot transfer temperature greater than 700°C, while others require a hot transfer temperature between 550°C and 600°C. Conventional continuous casting hot transfer systems cannot meet the requirements.

Contents of the invention

In order to keep the temperature of the slab transported in continuous casting production within the appropriate range. The invention provides a continuous casting billet hot feeding and off-line system. The continuous casting billet hot feeding and off-line system can control the surface temperature of the cast billet at 550°C-650°C, which meets the requirements of the steel rolling process; in addition, For roll changes and minor failures on the steel rolling production line, it plays the role of caching the slab, improves the hot delivery of the slab, and reduces the direct removal of the slab.

The technical invention adopted by the present invention to solve the technical problem is: a continuous casting billet hot conveying and off-line system, including a continuous casting machine billet discharge roller, a steel fishing machine, a hot conveying roller, a warm conveying roller, and a casting machine. The billet insulation bed and the hot steel rolling roller table are located on the right side of the billet discharge roller table of the continuous casting machine. The warm feed roller table is located on the left side of the billet discharge roller table of the continuous caster. On the back side of the billet discharge roller table, the steel fishing machine can transport the slabs on the billet discharge roller table of the continuous casting machine to the hot feed roller table or the warm feed roller table. The warm feed roller table can transport the cast slabs to the slab insulation bed. The cast slab on the slab insulation bed can be transported to the hot-feeding roller table. The hot-feeding steel-rolling roller table is located on the rear side of the hot-feeding roller table. The hot-feeding roller table can transport the slab to the hot-feeding steel rolling roller table.

The continuous casting billet hot feeding and off-line system also includes a fixed billet storage stand, which is located between the steel fishing machine and the hot feeding roller table.

There is a first cooling bed on the right side of the hot conveying roller table, and the steel scraper can transport the slab on the billet discharge roller table of the continuous casting machine to the first cooling bed.

There is a collection bed on the right side of the first cooling bed, and the first cooling bed can transport the slab to the collection bed.

There is a billet pushing device on the right side of the slab insulation bed. The hot conveying roller is located between the slab heating bed and the billet pushing device. The billet pushing device can transport the slab on the slab heating bed to the hot conveying roller.

The slab thermal insulation bed includes an upper and lower thermal insulation cover and a second cooling bed. The thermal insulation cover can insulate the slab on the second cooling bed. The thermal insulation cover can also move. The stepping speed of the second cooling bed can adjust.

The steel fishing machine is located above the billet discharge roller of the continuous casting machine. The transmission direction of the hot conveying roller is the front and rear direction, and the conveying direction of the warm conveying roller is the front and rear direction.

The slab insulation bed is lower than the billet discharge roller table of the continuous caster, and the hot steel rolling roller table is lower than the hot feed roller table.

The beneficial effects of the present invention are: the off-line system meets the billet discharging methods of hot billet delivery, warm billet delivery, pile cooling, slow cooling, and emergency billet picking. It improves the hot feed rate of the slab, saves energy and reduces consumption; meets the warm feed requirements of the steel rolling process; improves the flexibility of production and facilitates the connection between continuous casting and steel rolling.

Description of drawings

The description and drawings that constitute a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

Figure 1 is a top view of the continuous casting billet hot feeding and off-line system.

1. Continuous casting machine billet discharge roller table; 2. Steel fishing machine; 3. Hot feeding roller table; 4. Warm feeding roller table; 5. First cooling bed; 6. Collection bed; 7. Cast slab insulation bed; 8. , Fixed billet storage platform; 9. Billet pushing device; 10. Hot steel rolling roller table.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

A continuous casting billet hot feeding and off-line system, including a continuous caster billet discharge roller 1, a steel fishing machine 2, a hot feeding roller 3, a warm feeding roller 4, a slab insulation bed 7 and a hot feeding rolling roller. Lane 10, the hot conveying roller conveyor 3 is located on the right side of the continuous casting machine's billet exit roller conveyor 1, the warm conveying roller conveyor 4 is located on the left side of the continuous casting machine's billet exit roller conveyor 1, and the slab insulation bed 7 is located on the continuous casting machine's billet exit conveyor. On the rear side of the roller table 1, the steel scooping machine 2 can transport the slab on the continuous casting machine discharge roller table 1 to the hot feed roller table 3 or the warm feed roller table 4. The warm feed roller table 4 can transport the slab. to the slab insulation bed 7. The slab on the slab insulation bed 7 can be transported to the hot-feeding roller conveyor 3. The hot-feeding steel rolling roller conveyor 10 is located on the rear side of the hot-feeding roller conveyor 3. The hot-feeding roller conveyor 3 can The cast slab is transported to the hot steel rolling roller table 10, as shown in Figure 1.

In this embodiment, the continuous casting billet hot feeding and off-line system also includes a fixed billet storage platform 8 , which is located between the steel fishing machine 2 and the hot feeding roller table 3 . A first cooling bed 5 is provided on the right side of the hot conveying roller table 3, and the steel scooping machine 2 can transport the slab on the billet discharge roller table 1 of the continuous casting machine to the first cooling bed 5. A collection bed 6 is provided on the right side of the first cooling bed 5, and the first cooling bed 5 can transport the slab to the collection bed 6.

In this embodiment, a billet pushing device 9 is provided on the right side of the slab heating bed 7. The hot conveying roller 3 is located between the slab heating bed 7 and the billet pushing device 9. The billet pushing device 9 can push the slab onto the slab heating bed. The cast slab on 7 is transported to the hot feeding roller 3. The slab insulation bed 7 includes a thermal insulation cover and a second cooling bed arranged up and down. Both the first cooling bed 5 and the second cooling bed can be ordinary cooling beds. The thermal insulation cover can insulate the slab on the second cooling bed. The heat preservation cover can also be moved, and the stepping speed of the second cooling bed can be adjusted.

In this embodiment, the steel fishing machine 2 is located above the billet discharge roller 1 of the continuous casting machine. The billet discharge direction of the billet discharge roller 1 of the continuous casting machine is the front and rear direction, and the conveying direction of the hot feeding roller 3 is the front and rear direction. The conveying direction of the warm conveying roller 4 is the front and rear direction. The conveying direction of the hot steel rolling roller table 10 is the front and rear direction. The slab insulation bed 7 is lower than the billet discharge roller table 1 of the continuous caster, and the hot steel rolling roller table 10 is lower than the hot feed roller table 3 .

In order to facilitate understanding and description, the present invention uses an absolute positional relationship for expression, in which the directional word "front" represents the upper direction of Figure 1 , "back" represents the lower direction of Figure 1 , and "left" represents the direction of the lower side of Figure 1 The left direction, "right" means the right direction in Figure 1. The present invention is described using a user's perspective of observation, but the above directional terms cannot be understood or interpreted as limiting the scope of the present invention.

The working process of the continuous casting billet hot feeding and off-line system of the present invention is introduced below:

1. The cast slab is directly hot-sent, and the process route is 1-2-3-10.

The cast slab is transported to the steel scooping machine 2 through the billet discharge roller table 1 of the continuous casting machine. The steel scooping machine lifts the billet hook and transports it to the hot feeding roller table 3. The hot feeding roller table is connected with the steel rolling hot feeding roller table. The cast slab is transported to the steel rolling process. This process route can ensure that the temperature of the slab is relatively high and the surface temperature of the slab is greater than 700°C.

2. The slab is warmly delivered, and the process route is 1-2-4-7-3-10.

The cast slab is transported to the steel scooping machine 2 through the continuous casting machine's billet discharge roller table 1. The steel scooping machine lifts the cast slab hook to the warm conveying roller conveyor 4, and the warm conveying roller conveyor 4 transports the cast slab to the cast slab for heat preservation. 7 beds. The slab insulation bed 7 is composed of a conventional cooling bed (second cooling bed) and an insulation cover above the cooling bed. The insulation cover is movable. According to the insulation requirements, the insulation cover moves on the second cooling bed to adjust the coverage and is used to adjust the insulation. The cooling rate of the cooling bed, the billet storage capacity of the billet holding bed 7 is about 1 furnace of steel, the billet storage capacity is 30min-50min, and the outlet billet temperature adjustment range is 550℃-650℃. For the slab insulation bed, the running time of the slab on the cooling bed can be adjusted by adjusting the step speed of the cooling bed and whether to add a thermal insulation cover to adjust the temperature drop of the slab, so as to achieve the required slab surface temperature according to the steel rolling requirements. The slab heating bed gradually transports the slab to the cooling bed outlet, and the slab pushing device 9 transports the slab to the hot feeding roller 3. The hot feed roller conveyor is connected to the steel rolling hot conveyor roller conveyor to transport the cast slab to the steel rolling process. This process route can control the surface temperature of the slab at 550°C-650°C, which meets the requirements of the steel rolling process; it also serves as a cache for the slab and improves the hot delivery of the slab for roll changes and minor failures on the steel rolling production line. Reduce the casting billet to go offline directly.

3. The conventional cooling bed is taken off the production line, and the cast slabs are piled up for cold storage. The process route is 1-2-5-6.

The cast slab is transported to the steel scooping machine 2 through the continuous casting machine discharge roller 1. The steel scooping machine lifts the cast billet hook and transports it to the first cooling bed 5. The cooling bed steps the cast slab to the cooling bed outlet, where it is collected The bed 6 groups the slabs, and the slab clamps carried by the overhead crane take the slabs off the line and store them coldly. This process route is an off-line path that does not require hot delivery of the slab, but instead carries out cold storage of the slab.

4. The cast billet is stored in the slow cooling pit, and the process route is 1-2-8.

The cast billet is transported to the steel scooping machine 2 through the continuous casting machine billet discharge roller 1, and the steel casting machine lifts the billet hook and transports it to the fixed billet storage platform 8. The billet is lifted to the slow cooling pit through the billet clamp carried by the crane, and the billet undergoes the slow cooling process. This route can make the produced slab enter the slow cooling pit as soon as possible, ensuring the slow cooling effect of the slab and reducing intermediate links.

5. Processing of accidental billets.

For the first three working conditions, the accident billet can be transported to the fixed billet storage platform 8 through the steel fishing machine, and the accident billet can be picked out without affecting normal production. For the fourth working condition, it can be The steel fishing machine 2 lifts the billet hook and transports it to the first cooling bed 5. The cooling bed steps the billet to the cooling bed outlet and then transports it to the collection bed for picking out the accidental billets. By sorting out the accidental billets, the accidental billets can be prevented from entering the next process.

From the above introduction, it can be seen that the continuous casting billet hot feeding and off-line system can realize the following five billet off-line methods, while meeting the needs of different process requirements.

1. Direct hot feeding of the slab. This process route can ensure that the temperature of the slab is relatively high and the surface temperature of the slab is greater than 700°C.

2. The slab is warmly transported. The slab is transported to the steel scooping machine 2 through the continuous casting machine discharge roller 1. The steel fishing machine lifts the cast slab hook and transports it to the warm conveying roller 4. The warm conveying roller 4 will The slab is transported to the slab insulation bed 7. For the slab insulation bed, the running time of the slab on the cooling bed can be adjusted by adjusting the step speed of the cooling bed. The temperature drop of the slab can also be adjusted by adding a thermal insulation cover to achieve the required slab surface according to the steel rolling requirements. temperature. The slab heating bed gradually transports the slab to the cooling bed outlet, and the slab pushing device 9 transports the slab to the hot feeding roller 3. The hot feed roller conveyor is connected to the steel rolling hot conveyor roller conveyor to transport the cast slab to the steel rolling process. This process route can control the surface temperature of the slab at 550°C-650°C, which meets the requirements of the steel rolling process; it also serves as a cache for the slab and improves the hot delivery of the slab for roll changes and minor failures on the steel rolling production line. Reduce the casting billet to go offline directly.

3. The conventional cooling bed is taken off the production line, and the cast slabs are piled up for cold storage.

4. The cast billet is stored in the slow cooling pit.

5. Processing of accidental billets. For the first three working conditions, the accident billet can be transported to the fixed billet storage platform 8 through the steel fishing machine, and the accident billet can be picked out without affecting normal production. For the fourth working condition, it can be The steel fishing machine 2 lifts the billet hook and transports it to the first cooling bed 5. The cooling bed steps the billet to the cooling bed outlet and then transports it to the collection bed for picking out the accidental billets. By sorting out the accidental billets, the accidental billets can be prevented from entering the next process.

The above are only specific embodiments of the present invention and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the patent protection scope of the present invention, should still be covered by this patent. category. In addition, the technical features in the present invention can be freely combined with each other, between technical features and technical inventions, and between technical inventions and technical inventions.

Claims (6)

1. A continuous casting billet hot feeding and off-line system, characterized in that the continuous casting billet hot feeding and off-line system includes a continuous casting machine billet discharge roller (1), a steel fishing machine (2), Hot conveying roller table (3), warm conveying roller table (4), slab insulation bed (7) and hot steel rolling roller table (10). The hot conveying roller table (3) is located at the billet discharge roller table (1) of the continuous casting machine. ), the warm conveying roller table (4) is located on the left side of the billet discharge roller table (1) of the continuous casting machine, and the slab insulation bed (7) is located on the rear side of the billet discharge roller table (1) of the continuous casting machine. The steel machine (2) can transport the slab on the discharge roller table (1) of the continuous casting machine to the hot feeding roller table (3) or the warm feeding roller table (4). The warm feeding roller table (4) can transport the cast slab. The billet is transported to the slab insulation bed (7). The slab on the slab insulation bed (7) can be transported to the hot feeding roller conveyor (3). The hot steel rolling roller conveyor (10) is located on the hot conveying roller conveyor (3). ), the hot-feed roller conveyor (3) can transport the slab to the hot-feed steel rolling roller conveyor (10); There is a first cooling bed (5) on the right side of the hot conveying roller table (3). The steel fishing machine (2) can transport the cast slab on the billet discharge roller table (1) of the continuous casting machine to the first cooling bed (5). )superior; There is a billet pushing device (9) on the right side of the slab heating bed (7). The hot conveying roller (3) is located between the slab heating bed (7) and the billet pushing device (9). The billet pushing device (9) The cast slab on the slab insulation bed (7) can be transported to the hot conveying roller table (3). 2. The continuous casting billet hot feeding and off-line system according to claim 1, characterized in that the continuous casting billet hot feeding and off-line system also includes a fixed billet storage stand (8), a fixed billet storage stand (8), and a fixed billet storage stand (8). The billet storage stand (8) is located between the steel fishing machine (2) and the hot feeding roller (3). 3. The continuous casting billet hot delivery and off-line system according to claim 1, characterized in that a collection bed (6) is provided on the right side of the first cooling bed (5), and the first cooling bed (5) can Transport the cast slab to the collection bed (6). 4. The continuous casting billet hot delivery and off-line system according to claim 1, characterized in that the billet insulation bed (7) contains an insulation cover and a second cooling bed arranged up and down, and the insulation cover can The cast slab on the second cooling bed is insulated, the heat preservation cover can also be moved, and the step speed of the second cooling bed can be adjusted. 5. The continuous casting billet hot feeding and off-line system according to claim 1, characterized in that the steel fishing machine (2) is located above the billet discharge roller table (1) of the continuous casting machine, and the hot feeding roller table (3 ) is the front-to-back direction, and the conveying direction of the warm conveying roller (4) is the front-to-back direction. 6. The continuous casting billet hot feeding and off-line system according to claim 1, characterized in that the billet insulation bed (7) is lower than the continuous casting machine billet discharge roller table (1), and the hot steel rolling roller table ( 10) Lower than the hot feeding roller (3).