Short-process electric furnace steelmaking process arrangement method

Abstract

The invention discloses a short-process electric furnace steelmaking process arrangement method which solves the technical problems that an existing electric furnace steelmaking arrangement mode is low in production efficiency, one-time investment of an electric furnace steelmaking workshop is increased, and logistics transportation efficiency in the workshop is low. The short-process electric furnace steelmaking process arrangement method comprises the steps that an electric arc furnace, a ladle refining furnace, a continuous casting machine and a casting residue pouring device are sequentially arranged in a steelmaking workshop in the longitudinal direction of the steelmaking workshop, and a molten steel conveying line and a buggy ladle return line are arranged in the steelmaking workshop in parallel in the longitudinal direction of the steelmaking workshop; transportation buggy ladles are arranged on the molten steel transportation line and the buggy ladle return line; a first buggy ladle transverse displacement device and a second buggy ladle transverse displacement device are arranged in a steelmaking workshop, and the movement direction of a transportation buggy ladle can be switched between a molten steel transportation line and a buggy ladle return line through the first buggy ladle transverse displacement device and the second buggy ladle transverse displacement device. The production efficiency can be improved, the one-time investment of an electric furnace steelmaking workshop is reduced, and the logistics transportation efficiency in the workshop is improved.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical technology, specifically relating to a method for arranging a short-process electric arc furnace steelmaking process. Background Technology

[0002] The steel industry is one of the world's most energy-intensive industries, accounting for about 7% of global greenhouse gas emissions and 11% of global carbon dioxide emissions. Long-process steel mills, represented by blast furnaces and converters, produce about 72% of the world's steel and contribute 92% of the carbon dioxide generated by steel production, while short-process steel mills produce 28% of the world's steel and contribute 8% of the carbon dioxide generated by the steel industry.

[0003] Currently, there are various types of process layouts for short-process electric arc furnace steelmaking workshops. Based on factors such as furnace type, nominal furnace capacity, investment constraints, and site conditions, the main approaches are as follows: Method 1: Steel is tapped horizontally from the electric arc furnace. The steel is tapped across the span of the electric arc furnace, meaning that after tapping from the electric arc furnace, it is transported by a ladle car to another span in the workshop, and then hoisted by a crane in that span to the next refining process.

[0004] Method 2: Steel is tapped longitudinally from the electric arc furnace. The steel is tapped from the same span of the electric arc furnace and transported to the next refining process by a ladle car via the tapping track under the furnace, or by a crane within the same span to lift the ladle to the next refining process.

[0005] For method 1, the electric furnace taps steel horizontally, and the ladle enters another bay, which adds a heavy-duty workshop bay. At the same time, a metallurgical casting crane for lifting the ladle is required, which increases the project investment. For method 2, where steel is tapped longitudinally from the electric arc furnace, if the ladle is transported to the next refining process via the tapping track under the furnace, the ladle car and the ladle enter the refining furnace together, occupying the ladle car for the duration of the refining furnace's smelting cycle, thus affecting the electric arc furnace's production rhythm. If, after tapping, the ladle is lifted by an overhead crane within the same span to the next refining furnace ladle car, although this does not occupy the ladle car, it adds the time required for the crane to lift the ladle. This lifting process takes approximately 8-10 minutes, impacting production efficiency.

[0006] Therefore, the short-process electric arc furnace steelmaking layout in related technologies has disadvantages such as low production efficiency, increased initial investment in electric arc furnace steelmaking workshops, and low logistics and transportation efficiency within the workshops, which need to be improved. Summary of the Invention

[0007] In order to solve all or some of the above problems, the purpose of this invention is to provide a short-process electric arc furnace steelmaking process layout method, which can improve production efficiency, reduce the initial investment of the electric arc furnace steelmaking workshop, and improve the efficiency of logistics transportation within the workshop.

[0008] This invention provides a method for arranging a short-process electric arc furnace steelmaking process, comprising: The electric arc furnace, ladle refining furnace, continuous casting machine and casting equipment are arranged in sequence along the longitudinal direction of the steelmaking workshop, and the molten steel transport line and ladle car return line are arranged parallel along the longitudinal direction of the steelmaking workshop. A ladle car is provided on the molten steel transport line and the ladle car return line, and the ladle car can pass through the electric arc furnace, the ladle refining furnace and the continuous casting machine in sequence when it moves along the molten steel transport line. A first ladle car lateral shift position is set in the steelmaking workshop. The first ladle car lateral shift position is set on the side of the molten steel transport line and the ladle car return line close to the casting device. After the transport ladle car moves along the molten steel transport line and passes the continuous casting machine, the transport ladle car can move along the first ladle car lateral shift position to the ladle car return line. A second ladle car lateral shifter is set up in the steelmaking workshop. The second ladle car lateral shifter is located on the side of the molten steel transport line and the ladle car return line close to the electric arc furnace. After the transport ladle car moves along the ladle car return line to the side of the electric arc furnace, the transport ladle car can move along the second ladle car lateral shifter to the molten steel transport line.

[0009] Optionally, the electric arc furnace adopts a longitudinal steel tapping arrangement, and the electric arc furnace is a top-charging electric furnace, a horizontally continuously feeding scrap preheating electric furnace, or a vertical scrap preheating electric furnace.

[0010] Optionally, the continuous casting machine is arranged horizontally, the casting platform of the continuous casting machine is at the same level as the workshop floor, and the steel casting method of the continuous casting machine adopts vehicle-mounted ladle casting.

[0011] Optionally, the continuous casting machine is equipped with two reciprocating tundish trolleys, and the continuous casting platform of the continuous casting machine is not equipped with an online tundish baker.

[0012] Optionally, the ladle casting device includes a ladle casting position and a crane, the crane being used to lift the ladle from the ladle transport vehicle to the ladle casting position.

[0013] Optionally, a hot repair station for ladles is set up in the steelmaking workshop. The hot repair station for ladles is located on the opposite side of the ladle casting residue pouring station. After the casting residue pouring is completed, the crane is used to lift the ladle to the hot repair station for hot repair work. After the hot repair of the ladle is completed, the crane is used to lift the ladle to the ladle transport vehicle.

[0014] Optionally, a ladle dismantling station and a ladle cold repair station are provided in the steelmaking workshop. The ladle dismantling station is located on the side of the ladle hot repair station away from the first ladle car lateral movement station, and the ladle cold repair station is located on the side of the ladle casting station away from the first ladle car lateral movement station.

[0015] Optionally, a total of 3-4 ladle cars are set up on the molten steel transport line and the ladle car return line, and the ladle cars are new energy ladle cars that can be charged.

[0016] Optionally, two charging stations for ladle cars are provided in the steelmaking workshop. The two charging stations are located at corresponding ends of the ladle car return line, and the transport ladle car can be charged at either charging station.

[0017] Optionally, a furnace shell maintenance station is provided in the steelmaking workshop, and the furnace shell maintenance station is located on the side of the electric arc furnace away from the ladle refining furnace.

[0018] As can be seen from the above technical solution, the short-process electric arc furnace steelmaking process layout method provided by the present invention has the following advantages: This short-process electric arc furnace steelmaking process layout method can improve production efficiency, reduce the initial investment in the electric arc furnace steelmaking workshop, and improve the efficiency of logistics transportation within the workshop.

[0019] Other features and advantages of the present invention will be set forth in the following description. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.

[0021] Figure 1 This is a plan view of the short-process electric arc furnace steelmaking process layout method in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Electric arc furnace; 2. Ladle refining furnace; 3. Continuous casting machine; 4. Ladle casting device; 41. Ladle casting position; 42. Crane trolley; 5. Molten steel transport line; 6. Ladle car return line; 7. First ladle car lateral movement position; 8. Second ladle car lateral movement position; 9. Ladle hot repair position; 10. Ladle dismantling position; 11. Ladle cold repair position; 12. Ladle car charging position; 13. Furnace shell repair position; 14. Crusher; 15. Baler; 16. Gantry shear; 17. Crushed raw material storage area; 18. Crushed finished material storage area; 19. Baled material raw material storage area; 20. Finished product bale storage area; 21. Heavy scrap sheared raw material storage area; 22. Finished product sheared material storage area; 23. Transport ladle car. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be arbitrarily combined with each other.

[0024] like Figure 1 The illustration shows an embodiment of the present invention, which discloses a method for arranging a short-process electric arc furnace steelmaking process, including: Within the steelmaking workshop, an electric arc furnace 1, a ladle refining furnace 2, a continuous casting machine 3, and a casting recovery device 4 are arranged sequentially along its longitudinal direction. A molten steel transport line 5 and a ladle car return line 6 are arranged parallel to each other along the longitudinal direction of the steelmaking workshop, with the molten steel transport line 5 passing sequentially through the electric arc furnace 1, the ladle refining furnace 2, and the continuous casting machine 3. In this embodiment, the longitudinal direction of the steelmaking workshop refers to the length of the steelmaking workshop.

[0025] Three to four ladle cars 23 are installed on the molten steel transport line 5 and the ladle car return line 6. As the ladle cars 23 move along the molten steel transport line 5, they sequentially pass the electric arc furnace 1, the ladle refining furnace 2, and the continuous casting machine 3. In this embodiment, the ladle car 23 is a moving trolley that supports the ladle and sits above the tundish. When multiple heats are cast consecutively, two ladle cars 23 can be configured to achieve rapid ladle replacement.

[0026] A first ladle car lateral shifter 7 is set up in the steelmaking workshop. The first ladle car lateral shifter 7 is set on the side of the molten steel transport line 5 and the ladle car return line 6 near the casting device 4. One end of the first ladle car lateral shifter 7 is connected to the molten steel transport line 5 and the other end is connected to the ladle car return line 6. After the transport ladle car 23 moves along the molten steel transport line 5 and passes the continuous casting machine 3, the transport ladle car 23 can move along the first ladle car lateral shifter 7 to the ladle car return line 6.

[0027] A second ladle car lateral shifter 8 is set up in the steelmaking workshop. The second ladle car lateral shifter 8 is set on the side of the molten steel transport line 5 and the ladle car return line 6 near the electric arc furnace 1. One end of the second ladle car lateral shifter 8 is connected to the molten steel transport line 5 and the other end is connected to the ladle car return line 6. After the transport ladle car 23 moves along the ladle car return line 6 to the side of the electric arc furnace 1, the transport ladle car 23 can move along the second ladle car lateral shifter 8 onto the molten steel transport line 5.

[0028] In this embodiment, the short-process electric arc furnace steelmaking process layout involves a direct connection between the electric arc furnace 1 and the ladle refining furnace 2, meaning they share a single ladle car 23 and molten steel transport line 5. Similarly, the ladle refining furnace 2 and the continuous casting machine 3 are also directly connected, sharing the same ladle car 23 and molten steel transport line 5. This eliminates the need for hoisting operations, reducing costs and improving production efficiency.

[0029] Furthermore, by using two ladle cars to laterally shift, the ladle transport car 23 achieves a reciprocating cycle. The ladle and transport car 23 complete one work cycle within the workshop without the need for overhead cranes. This achieves a "one-cart-one-ladle" system and ensures smooth turnover of the ladle and transport car 23. This design reduces investment in the steelmaking workshop, decreases the number of overhead cranes within the workshop, reduces the number of ladle lifting operations between processes, improves workshop logistics and production efficiency, and reduces production costs.

[0030] In one embodiment, such as Figure 1 As shown, the electric arc furnace 1 adopts a longitudinal steel tapping arrangement, that is, the steel tapping direction is parallel to the length of the plant. Furthermore, the electric arc furnace 1 can be a top-charged electric furnace, a horizontally continuously fed scrap preheating electric furnace, or a vertical scrap preheating electric furnace. Of course, in other embodiments, the electric arc furnace 1 can also use other types of electric furnaces, which will not be listed in detail here.

[0031] In one embodiment, such as Figure 1 As shown, the continuous casting machine 3 adopts a horizontal layout. The casting platform of the continuous casting machine 3 is at the same elevation as the workshop floor, and the steel casting method of the continuous casting machine 3 adopts vehicle-mounted ladle casting, that is, the ladle transport vehicle 23 drives directly to the casting position of the casting machine. At the same time, two reciprocating trolleys are installed on the continuous casting machine 3, and there is no online trolley baking device on the continuous casting platform of the continuous casting machine 3.

[0032] In one embodiment, such as Figure 1 As shown, the ladle casting device 4 includes a ladle casting position 41 and a crane 42. When the ladle car 23 completes the casting operation and moves to the ladle car dispatch position, the crane 42 lifts the ladle on the ladle car 23 to the ladle casting position 41 and performs the casting operation.

[0033] In this embodiment, the ladle car dispatching position refers to the end of the molten steel transport line 5 near the ladle casting position 41. After the transport ladle car 23 arrives at this position, it can move to the ladle car return line 6 through the first ladle car lateral shift position 7.

[0034] In one embodiment, such as Figure 1As shown, a ladle hot repair position 9 is set up in the steelmaking workshop. The ladle hot repair position 9 is located opposite the ladle casting position 41, that is, at the end of the smelting span. After the casting is completed, the crane 42 can lift the ladle to the ladle hot repair position 9 for hot repair work. Simultaneously, when the casting of one ladle on a transport ladle car 23 is completed, that transport ladle car 23 moves to the end, leaving process space for the next transport ladle car 23 to cast. Furthermore, after the ladle hot repair is completed, the crane 42 can also lift the ladle onto the transport ladle car 23, allowing the transport ladle car 23 to begin the next process cycle.

[0035] In one embodiment, such as Figure 1 As shown, a ladle dismantling position 10 and a ladle cold repair position 11 are set up in the steelmaking workshop. The ladle dismantling position 10 is located on the side of the ladle hot repair position 9 away from the first ladle car lateral movement position 7, and the ladle cold repair position 11 is located on the side of the ladle casting position 41 away from the first ladle car lateral movement position 7.

[0036] In one embodiment, such as Figure 1 As shown, the ladle transport vehicle 23 is a new energy ladle vehicle that can be charged. At the same time, two ladle vehicle charging positions 12 are set in the steelmaking workshop. The two ladle vehicle charging positions 12 are set at the corresponding ends of the ladle vehicle return line 6, so that the ladle transport vehicle 23 can be charged at either ladle vehicle charging position 12.

[0037] In one embodiment, such as Figure 1 As shown, a furnace shell maintenance station 13 is set up in the steelmaking workshop, and the furnace shell maintenance station 13 is located on the side of the electric arc furnace 1 away from the ladle refining furnace 2.

[0038] In one embodiment, such as Figure 1 As shown, a crusher 14, a baler 15, and a gantry shear 16 are arranged in the steelmaking workshop. The crusher 14, the baler 15, and the gantry shear 16 are located on the side of the casting position, and the crusher 14, the baler 15, and the gantry shear 16 are arranged in sequence along the transverse direction of the steelmaking workshop.

[0039] In one embodiment, such as Figure 1 As shown, in the steelmaking workshop, a crushed raw material stacking area 17 is set up on one side of the crusher 14 and a crushed finished material stacking area 18 is set up on the other side. In the steelmaking workshop, a baling material raw material stacking area 19 is set up on one side of the baler 15 and a finished bale stacking area 20 is set up on the other side. In the steelmaking workshop, a heavy scrap shearing material stacking area 21 is set up on one side of the gantry shear 16 and a finished shearing material stacking area 22 is set up on the other side.

[0040] The steelmaking process in this embodiment is as follows: After the electric arc furnace 1 completes the smelting, the steel is tapped into the ladle on the transport ladle car 23. The transport ladle car 23 carries the ladle through the molten steel transport line 5 to the smelting station of the ladle refining furnace 2. After the ladle refining furnace 2 completes the smelting (the composition and temperature of the molten steel meet the casting requirements), the transport ladle car 23 drives to the molten steel casting position of the continuous casting machine 3. The ladle carried on the transport ladle car 23 opens the sliding gate and begins casting. After casting is completed, the transport ladle car 23 drives to the ladle car dispatching position.

[0041] Subsequently, the ladle on the transport ladle car 23 is lifted by the crane 42 to the ladle casting position 41. After the casting is completed, the ladle is lifted by the crane 42 to the ladle hot repair position 9 for hot repair work. At the same time, the transport ladle car 23 moves to the ladle car return line 6 via the first ladle car lateral shift position 7. After the ladle hot repair is completed, the ladle is lifted by the crane 42 back onto the transport ladle car 23.

[0042] Subsequently, the ladle car moves to the second ladle car lateral shift position 8 on the ladle return line, and then moves to the molten steel transport line 5 via the second ladle car lateral shift position 8. At this time, the ladle on the transport ladle car 23 is ready to receive the molten steel produced in the electric arc furnace 1, thus starting the next work cycle.

[0043] As can be seen from the above, the short-process electric arc furnace steelmaking process layout method in this embodiment can reduce the investment in steelmaking workshop buildings, reduce the number of overhead cranes in the workshop, reduce the hoisting links of steel ladles between various processes, improve the efficiency of workshop logistics and production efficiency, and at the same time reduce production costs.

[0044] It should be noted that, unless otherwise stated, the technical or scientific terms used in this invention should have the ordinary meaning as understood by one of ordinary skill in the art.

[0045] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A short process electric furnace steelmaking process arrangement method, characterized in that, Comprise: Arranging electric arc furnace (1), ladle refining furnace (2), continuous casting machine (3) and casting remaining device (4) along the longitudinal direction of the steelmaking plant in sequence, and arranging molten steel transport line (5) and ladle car return line (6) along the longitudinal direction of the steelmaking plant in parallel; Transporting ladle car (23) is arranged on the molten steel transport line (5) and the ladle car return line (6), and the transporting ladle car (23) can pass through the electric arc furnace (1), the ladle refining furnace (2) and the continuous casting machine (3) in sequence when moving along the molten steel transport line (5); First ladle car transverse displacement (7) is arranged in the steelmaking plant, the first ladle car transverse displacement (7) is arranged on the side of the molten steel transport line (5) and the ladle car return line (6) close to the casting remaining device (4), and the transporting ladle car (23) can move to the ladle car return line (6) along the first ladle car transverse displacement (7) after moving along the molten steel transport line (5) and passing through the continuous casting machine (3); Second ladle car transverse displacement (8) is arranged in the steelmaking plant, the second ladle car transverse displacement (8) is arranged on the side of the molten steel transport line (5) and the ladle car return line (6) close to the electric arc furnace (1), and the transporting ladle car (23) can move to the molten steel transport line (5) along the second ladle car transverse displacement (8) after moving along the ladle car return line (6) and moving to the side of the electric arc furnace (1).

2. Short process electric steelmaking plant arrangement method according to claim 1, characterized in that, The electric arc furnace (1) adopts longitudinal tapping arrangement type, and the electric arc furnace (1) adopts top charging electric furnace, horizontal continuous charging scrap steel preheating electric furnace or vertical scrap steel preheating electric furnace.

3. The short- process electric steelmaking process arrangement method according to claim 1, characterized in that, The continuous casting machine (3) adopts under-laying arrangement, the casting platform of the continuous casting machine (3) is consistent with the workshop ground level, and the pouring mode of the continuous casting machine (3) adopts vehicle-mounted ladle pouring.

4. Short process electric steelmaking process arrangement method according to claim 3, characterized in that, Two reciprocating intermediate ladle trolleys are arranged on the continuous casting machine (3), and no on-line intermediate ladle oven is arranged on the casting platform of the continuous casting machine (3).

5. The short- process electric steelmaking process arrangement method according to claim 1, characterized in that, The casting remaining device (4) comprises a ladle casting remaining position (41) and a hoisting trolley (42), and the hoisting trolley (42) is used for hoisting the ladle on the transporting ladle car (23) to the ladle casting remaining position (41).

6. The short- process electric steelmaking process arrangement method according to claim 5, characterized in that, Ladle hot repair position (9) is arranged in the steelmaking plant, the ladle hot repair position (9) is arranged on the side opposite to the ladle casting remaining position (41), the hoisting trolley (42) is used for hoisting the ladle to the ladle hot repair position (9) for hot repair operation after casting remaining, and the hoisting trolley (42) is used for hoisting the ladle to the transporting ladle car (23) after the hot repair of the ladle is completed.

7. Short process electric steelmaking plant arrangement method according to claim 6, characterized in that, Pot package disassembly position (10) and pot package cold repair position (11) are arranged in the steelmaking plant, the pot package disassembly position (10) is arranged on the side of the ladle hot repair position (9) away from the first ladle car transverse displacement (7), and the pot package cold repair position (11) is arranged on the side of the ladle casting remaining position (41) away from the first ladle car transverse displacement (7).

8. The short- process electric steelmaking process arrangement method according to claim 1, characterized in that, The steel ladle transport line (5) and the steel ladle return line (6) are provided with 3-4 steel ladle transport vehicles (23), and the steel ladle transport vehicle (23) is a new energy steel ladle vehicle capable of charging.

9. Short process electric steelmaking process arrangement method according to claim 8, characterized in that, Two steel ladle charging positions (12) are arranged in the steelmaking workshop, the two steel ladle charging positions (12) are arranged at the respective ends of the steel ladle return line (6), and the steel ladle transport vehicle (23) can be charged at any steel ladle charging position (12).

10. The short- process electric steelmaking process arrangement method according to claim 1, characterized in that, A furnace shell maintenance position (13) is arranged in the steelmaking workshop, and the furnace shell maintenance position (13) is arranged on the side of the electric arc furnace (1) away from the steel ladle refining furnace (2).

Images