Rotary pouring device for steel ladle
By designing a ladle rotary casting device including multiple double-arm ladle rotary tables and multiple injection holes, the problem of unstable casting of steel caused by frequent ladle replacement in continuous casting production is solved, and uniform casting of molten steel and the stability of the continuous casting billet quality is achieved.
Patent Information
- Application Number
- CN202420662423.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-04-02
AI Technical Summary
In continuous casting production, since the converter capacity of the steelmaking workshop has not expanded, the pouring time of the ladle is shortened, and frequent replacement of the ladle is required, resulting in a decrease in the liquid level of the steel in the intermediate tank, and changes in temperature and flow field, which affects the purity of the molten steel and the quality stability of the continuous casting billet.
A ladle rotary casting device is designed, including an intermediate tank and multiple double-arm ladle rotary tables. A multiple injection holes are provided on the top of the middle tank. The double-arm ladle rotary table is aligned with the injection holes. The rotation and stop of the double-arm ladle rotary table is accurately controlled through the control unit to achieve continuous rotation of the ladle and uniform pouring of the molten steel.
The number of times of replacement of ladles is reduced, the time of pouring steel is extended, the temperature field and flow field uniformity of the molten steel in the intermediate tank is improved, the time of floating in inclusions is extended, the cleanliness and continuous casting efficiency of the molten steel is improved, and the quality of the continuous casting billet is stabilized.
Smart Images
Figure CN222710806U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steelmaking and continuous casting, in particular to a ladle rotary casting device. Background Art
[0002] The ladle turret is one of the key equipment in continuous casting production. It is usually set between the molten steel receiving span and the pouring span column. Its main function is to receive the ladle filled with molten steel, rotate the turret, and make the ladle stop above the intermediate tank to supply molten steel. The empty ladle after pouring is rotated by the turret and then transported back to the smelting area.
[0003] At present, continuous casting machines mostly use a single ladle turret casting method, with one arm at the pouring position and the other arm at the receiving position. At the end of the pouring, the ladle filled with molten steel is placed on the arm on the receiving position by the overhead crane. After the ladle at the pouring position is poured, the two arms rotate at the same time, rotating the large ladle filled with molten steel to the pouring position, and the empty ladle rotates to the receiving position at the same time, and the empty ladle is taken off the line by the overhead crane. With the rapid development of high-efficiency continuous casting technology, the casting speed of continuous casting machines has gradually increased, but considering the development of product diversification, the converter capacity of the steelmaking workshop has not been expanded, resulting in shorter and shorter pouring time of molten steel in the ladle, and the need to frequently change the ladle for pouring. During the interval period when the ladle turret switches ladles, no molten steel is replenished to the tundish, but the molten steel flux from the tundish to the crystallizer does not change, resulting in a decrease in the molten steel level in the tundish, changes in the molten steel temperature and flow field in the tundish, and changes in the floating behavior of inclusions in the molten steel in the tundish, which has an adverse effect on the purity of the molten steel; at the same time, when the molten steel in the ladle is replaced and molten steel is re-injected into the tundish, during the mixing period of the new and old molten steel, the molten steel temperature, flow field and floating behavior of inclusions in the tundish will change again, resulting in poor stability in the quality of the continuous casting billets during this period.
[0004] In view of this, the inventor has designed a ladle rotary casting device based on many years of production design experience in this field and related fields and through repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content
[0005] The utility model aims to provide a ladle rotary casting device, which can effectively reduce the number of times of changing the ladle for casting, and improve the continuous casting efficiency and the quality stability of the continuous casting billet.
[0006] In order to achieve the above-mentioned object, the utility model proposes a ladle rotary pouring device, wherein the ladle rotary pouring device comprises:
[0007] The top of the intermediate tank is provided with two or more injection holes arranged sequentially and spaced apart;
[0008] More than two double-arm ladle turrets are arranged in parallel on the same side of the intermediate tank, and the double-arm ladle turrets are aligned with the injection holes one by one. The double-arm ladle turrets include a swivel support mechanism, a rotation drive mechanism and two support arms. The rotation drive mechanism is connected to the swivel support mechanism and drives the swivel support mechanism to rotate. The two support arms are symmetrically arranged on both sides of the swivel support mechanism and rotate synchronously with the swivel support mechanism. Each of the support arms is respectively provided with a receiving position for placing a ladle.
[0009] The ladle rotary pouring device as described above, wherein the distance between two adjacent injection holes is greater than the length of the support arm.
[0010] The ladle rotary pouring device as described above, wherein the ladle rotary pouring device also includes a control unit, the control unit is electrically connected to the rotation drive mechanism, the control unit controls the electrical connection of the rotation drive mechanism, and the control unit controls the rotation and stop of the support arm through the rotation drive mechanism.
[0011] The ladle rotary casting device as described above, wherein the two support arms of the double-arm ladle turret are symmetrically arranged at 180 degrees.
[0012] The ladle rotary casting device as described above, wherein the rotary support mechanism of the double-arm ladle turret rotates 180 degrees each time.
[0013] The ladle rotary casting device as described above, wherein the control unit drives each of the double-arm ladle turrets to rotate in sequence, and the rotation interval between two adjacent double-arm ladle turrets is a fixed time.
[0014] The ladle rotary casting device as described above, wherein the rotation interval between two adjacent double-arm ladle turrets is 28 minutes.
[0015] The ladle rotary pouring device as described above, wherein the ladle rotary pouring device comprises two double-arm ladle turrets, and two injection holes are correspondingly opened on the intermediate tank.
[0016] The ladle rotary pouring device as described above, wherein the ladle rotary pouring device comprises a plurality of the double-arm ladle turrets, and a plurality of the injection holes are correspondingly opened on the intermediate tank.
[0017] The ladle rotary pouring device as described above, wherein a ladle is arranged on each of the accommodating positions.
[0018] Compared with the prior art, the utility model has the following characteristics and advantages:
[0019] The ladle rotary pouring device proposed by the utility model receives ladles respectively through more than two double-arm ladle rotary tables and transfers the ladles to the pouring positions to pour molten steel into the intermediate tank, thereby reducing the number of times the ladle is replaced and prolonging the molten steel pouring time; at the same time, the residence time of the molten steel in the intermediate tank is prolonged, the temperature field and flow field of the molten steel are more uniform, the floating time of inclusions is prolonged, and the cleanliness of the molten steel and the continuous casting efficiency are improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.
[0021] Figure 1 A top view of the ladle rotary casting device proposed in the utility model (I);
[0022] Figure 2 It is a side view of the ladle rotary casting device proposed by the utility model;
[0023] Figure 3 A top view of the ladle rotary casting device proposed in the utility model (II);
[0024] Figure 4 This is a top view of the ladle rotary casting device proposed in the utility model (three).
[0025] Description of Reference Numerals
[0026] 100. Ladle rotary pouring device; 10. Tundish;
[0027] 11. Injection hole; 20. Double-arm ladle turret;
[0028] 21. Rotary support mechanism; 22. Rotary drive mechanism;
[0029] 23. Support arm; 30. Ladle. DETAILED DESCRIPTION
[0030] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.
[0031] like Figure 1 , Figure 2 As shown, the utility model proposes a ladle rotary pouring device 100, which includes a tundish 10 and two or more double-arm ladle turrets 20. The top of the tundish 10 is provided with two or more injection holes 11 arranged sequentially and spaced apart. The two or more double-arm ladle turrets 20 are arranged side by side on the same side of the tundish 10, and each double-arm ladle turret 20 is matched with the injection holes 11 one by one. The double-arm ladle turret 20 includes a rotary support mechanism 21, a rotary drive mechanism 22 and two support arms 23. The rotary drive mechanism 22 is connected to the rotary support mechanism 21 and drives the rotary support mechanism 21 to rotate. The two support arms 23 are symmetrically arranged on both sides of the rotary support mechanism 21 and rotate synchronously with the rotary support mechanism 21. Each support arm 23 is respectively provided with a receiving position for placing the ladle 30.
[0032] The ladle rotary pouring device 100 proposed in the utility model receives the ladle 30 respectively through more than two double-arm ladle turntables 20, and transfers the ladle 30 to the pouring position to pour molten steel into the intermediate tank 10, thereby reducing the number of times the ladle is replaced and prolonging the molten steel pouring time; at the same time, the residence time of the molten steel in the intermediate tank is prolonged, the temperature field and flow field of the molten steel are more uniform, the floating time of inclusions is prolonged, and the cleanliness of the molten steel and the continuous casting efficiency are improved.
[0033] In an optional embodiment of the utility model, the distance between two adjacent injection holes 11 is greater than the length of the support arm 23, that is, the distance between the two double-arm ladle turntables 20 is greater than the support arm 23, so that the two adjacent double-arm ladle turntables 20 will not interfere with each other during operation.
[0034] In an optional embodiment of the utility model, the ladle rotary pouring device 100 also includes a control unit (not shown in the figure), which is electrically connected to the rotation drive mechanism 22 of each double-arm ladle turntable 20, and the control unit controls the rotation and stop of the rotary support mechanism 21 through the rotation drive mechanism 22, so that the control unit can accurately control the operation and stop of each double-arm ladle turntable 20.
[0035] In an optional example of this embodiment, the two support arms 23 of the double-arm ladle turret 20 are symmetrically arranged at 180 degrees.
[0036] In an optional example, the swivel support mechanism 21 of the double-arm ladle turret 20 rotates 180 degrees each time.
[0037] Furthermore, the double-arm ladle turret 20 has a ladle receiving position and a pouring position symmetrically arranged on both sides of the rotary support mechanism 21, that is, the ladle receiving position and the pouring position are symmetrically arranged at 180 degrees, and the rotary support mechanism 21 drives the support arm 23 to rotate between the ladle receiving position and the pouring position.
[0038] In an optional example of this embodiment, the control unit is capable of controlling the double-arm ladle turrets 20 to operate simultaneously, receive the ladles 30 simultaneously, and pour molten steel into the intermediate tank 10 simultaneously.
[0039] In an optional embodiment of this embodiment, the control unit drives each double-arm ladle turntable 20 to rotate in sequence, and the operation interval between two adjacent double-arm ladle turntables 20 is a fixed time, that is, the control unit controls each double-arm ladle turntable 20 to operate sequentially at fixed time intervals, so that each double-arm ladle turntable 20 receives the ladle 30 in sequence, and rotates to the pouring position in sequence.
[0040] Preferably, the rotation interval of two adjacent double-arm ladle turrets 20 is 28 minutes.
[0041] In an optional example, each double-arm ladle turret 20 pours molten steel into the tundish 10 simultaneously.
[0042] In another optional example, each double-arm ladle turret 20 pours molten steel into the tundish 10 in sequence.
[0043] In an optional embodiment of the present invention, the ladle rotary pouring device 100 includes two double-arm ladle turrets 20 , and two injection holes 11 are correspondingly opened on the intermediate tank 10 .
[0044] In another optional embodiment of the present invention, the ladle rotary pouring device 100 includes a plurality of double-arm ladle turrets 20 , and a plurality of injection holes 11 are correspondingly opened on the intermediate tank 10 .
[0045] In an optional embodiment of the utility model, a ladle 30 is provided at each accommodation position. When the ladle 30 is transferred to a position (pouring position) close to the intermediate tank 10 with the support arm 23, the ladle 30 pours molten steel into the intermediate tank 10; when the empty ladle 30 after pouring is transferred to a position (receiving position) away from the intermediate tank 10 with the support arm 23, the overhead crane can lift the empty ladle 30 off the production line.
[0046] Please refer to Figures 1 to 4 As shown, the specific implementation process and working principle of the ladle rotary pouring device 100 proposed by the utility model are now described in detail in combination with an embodiment.
[0047] In this embodiment, the ladle rotary pouring device 100 includes two double-arm ladle turrets 20, and two injection holes 11 are correspondingly provided on the intermediate tank 10. The double-arm ladle turret 20 includes a swivel support mechanism 21, a rotation drive mechanism 22 and two support arms 23, and the two support arms 23 are connected to the swivel support mechanism 21, and the two support arms 23 are driven by the rotation drive mechanism 22 to rotate simultaneously. Figure 2 As shown in FIG. 1 , the ladle rotary pouring device 100 is in a normal working position, and the double-arm ladle turret 20 receives two ladles 30 from the ladle receiving position. The double-arm ladle turret 20 on the left first rotates 180° to make the left ladle 30 reach the pouring position, and the double-arm ladle turret 20 on the right does not operate at this time. Figure 3 Then the double-arm ladle turret 20 on the right side rotates 180°, so that the ladle 30 on the right side reaches the pouring position, as shown. Figure 4 As shown. Then, the molten steel of the two ladles 30 is simultaneously injected into the tundish 10. When the molten steel in the tundish 10 reaches the target liquid level, the opening of the long shroud of each ladle is adjusted so that the molten steel injected into the tundish 10 is the same as the molten steel flux flowing into the crystallizer from the tundish 10, so that the liquid level of the tundish 10 remains stable. When the molten steel in the ladle 30 at the pouring position is about to be poured, the ladle receiving position of the double-arm ladle turntable 20 receives the ladle full of molten steel lifted by the overhead crane, and waits for the ladle at the pouring position to be poured. After that, the left double-arm ladle turntable 20 rotates 180°, and the right double-arm ladle turntable 20 does not operate at this time. Then, the right double-arm ladle turntable 20 rotates 180°, and the ladle at the pouring position can be poured, and the empty ladle at the receiving position can be lifted off the line by the overhead crane. This reciprocating cycle achieves continuous production.
[0048] The ladle rotary pouring device 100 in this embodiment can be used in a 100-ton converter workshop in conjunction with an ultra-thin strip continuous casting and rolling production line. The continuous casting machine is a single stream, and the molten steel throughput of the crystallizer is about 7t / min. When a single-ladle turret production mode is adopted, the turret is rotated and the ladle is changed approximately every 14 minutes; if the ladle rotary pouring device 100 production mode proposed by the utility model is adopted, the turret is changed approximately every 28 minutes, which reduces the number of times the ladle is changed for pouring, and improves the continuous casting efficiency and the quality stability of the continuous casting billet.
[0049] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.
Claims
1. A ladle rotary casting device, characterized in that: The ladle rotary casting device comprises: The top of the intermediate tank is provided with two or more injection holes arranged sequentially and spaced apart; More than two double-arm ladle turrets are arranged in parallel on the same side of the intermediate tank, and the double-arm ladle turrets are aligned with the injection holes one by one. The double-arm ladle turrets include a swivel support mechanism, a rotation drive mechanism and two support arms. The rotation drive mechanism is connected to the swivel support mechanism and drives the swivel support mechanism to rotate. The two support arms are symmetrically arranged on both sides of the swivel support mechanism and rotate synchronously with the swivel support mechanism. Each of the support arms is respectively provided with a receiving position for placing a ladle.
2. The ladle rotary casting device according to claim 1, characterized in that: The distance between two adjacent injection holes is greater than the length of the support arm.
3. The ladle rotary casting device according to claim 1, characterized in that: The ladle rotary pouring device also includes a control unit, which is electrically connected to the rotary drive mechanism, and the control unit controls the rotation and stop of the support arm through the rotary drive mechanism.
4. The ladle rotary casting device according to claim 3, characterized in that: The two support arms of the double-arm ladle turret are symmetrically arranged at 180 degrees.
5. The ladle rotary casting device according to claim 4, characterized in that: The slewing support mechanism of the double-arm ladle turret rotates 180 degrees each time.
6. The ladle rotary casting device according to claim 5, characterized in that: The control unit drives each of the double-arm ladle turrets to rotate in sequence, and the rotation interval between two adjacent double-arm ladle turrets is a fixed time.
7. The ladle rotary casting device according to claim 6, characterized in that: The rotation interval of two adjacent double-arm ladle turrets is 28 minutes.
8. The ladle rotary casting device according to claim 1, characterized in that: The ladle rotary pouring device comprises two double-arm ladle turrets, and two injection holes are correspondingly provided on the intermediate tank.
9. The ladle rotary casting device according to claim 1, characterized in that: The ladle rotary pouring device comprises a plurality of the double-arm ladle turrets, and a plurality of the injection holes are correspondingly opened on the intermediate tank.
10. The ladle rotary casting device according to claim 1, characterized in that: A steel ladle is arranged on each of the accommodating positions.