Accurate casting powder adding device and continuous casting machine

Abstract

The utility model relates to a precise casting powder adding device and a continuous casting machine, the precise casting powder adding device comprises a feeding assembly and a control assembly, the feeding assembly comprises a feeding hopper and a crystallizer, the crystallizer is arranged at the bottom of the feeding hopper, and a discharging port of the feeding hopper is communicated with the crystallizer; the control assembly comprises a flow control valve, a weighing sensor and a liquid level measuring instrument, and the control valve is arranged at a discharging opening of the feeding hopper; the weighing sensor is arranged on the outer side of the feeding hopper in the circumferential direction of the hopper, and the detection end of the weighing sensor abuts against the feeding hopper. The detection end of the position sensor is arranged opposite to the crystallizer; the liquid level sensor is electrically connected with the weighing sensor, and the weighing sensor is electrically connected with the flow control valve. The liquid level detector is used for detecting the liquid level height of molten steel in the crystallizer, the weighing sensor and the flow control valve are matched to accurately control the adding amount of casting powder, and fluctuation of the liquid level of the molten steel in crystals is prevented from being affected by inaccurate adding amount of the casting powder. Uniform heat transfer in the crystallizer is ensured, and the forming quality of casting blanks is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical engineering, in particular to a protective slag precise adding device and a continuous casting machine. Background Art

[0002] The continuous casting machine equipment is a key equipment in the iron and steel industry for continuously casting high-temperature molten steel into billets. Its main components include a ladle turret, a ladle, an intermediate ladle, a mold, a vibration table device, a secondary cooling device, a straightening device, a cutting device, and a billet discharging device, etc.

[0003] The mold is a key component in the continuous casting machine, which is used to receive molten steel and solidify it into a solid shell, while the protective slag is an important auxiliary material in continuous casting production and has an important impact on the quality of billets and the production process. The protective slag plays multiple functions in continuous casting production, such as preventing secondary oxidation of molten steel, heat insulation, and improving billet lubrication. Therefore, the addition amount of the protective slag will directly affect the quality of molten steel pouring.

[0004] In the prior art, it is difficult to accurately add the protective slag. When the slag addition amount is insufficient, it may lead to an increase in the friction between the billet and the mold wall, easily causing defects such as surface scratches and cracks on the billet. The heat transfer in the mold is uneven, which may lead to uneven cooling of the billet and affect the internal tissue structure and performance of the billet. The molten steel is easily directly exposed to the air, increasing the risk of air absorption and secondary oxidation, thereby affecting the purity of the steel. When the slag addition amount is too much: it may affect the heat transfer of the molten steel in the mold, resulting in difficult temperature control, and it may also make inclusions not easily float and be removed. It wastes the resources of the protective slag, increases the cost, and may also affect the economy of continuous casting production. It may bring inconvenience to subsequent cleaning and other operations. Summary of the Utility Model

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the addition of the protective slag in the prior art is difficult to accurately control and affects the quality of molten steel pouring.

[0006] To solve the above technical problem, the utility model provides a protective slag precise adding device, including:

[0007] A feeding assembly, the feeding assembly includes a feeding hopper and a mold, the mold is arranged at the bottom of the hopper, and the discharge port of the feeding hopper is communicated with the mold;

[0008] A control component, the control component includes a flow control valve, a weighing sensor and a liquid level measuring instrument. The control valve is arranged at the discharge port of the feeding hopper. The weighing sensor is arranged on the outer side of the feeding hopper along the circumferential direction of the hopper, and the detection end of the weighing sensor abuts against the feeding hopper. The liquid level sensor is arranged on the outer side of the crystallizer, and the detection end of the liquid level sensor faces the crystallizer. The liquid level sensor is electrically connected to the weighing sensor, and the weighing sensor is electrically connected to the flow control valve.

[0009] In an embodiment of the present invention, a feeding pipe is arranged at the discharge port of the feeding hopper, and two ends of the feeding pipe are respectively connected to the feeding hopper and the crystallizer.

[0010] In an embodiment of the present invention, two ends of the flow control valve and the feeding hopper and the feeding pipe are detachably connected by a flange.

[0011] In an embodiment of the present invention, the feeding assembly further includes a conveyor belt. The conveyor belt is arranged on the top of the feeding hopper, and the output end of the conveyor belt is arranged close to the feeding hopper.

[0012] In an embodiment of the present invention, a driving roller and a driven roller are covered inside the conveyor belt, and a driving source is arranged at one end of the driving roller.

[0013] In an embodiment of the present invention, the control component further includes a control module. The flow control valve, the weighing sensor, the driving source and the liquid level measuring instrument are all electrically connected to the control module.

[0014] In an embodiment of the present invention, the flow control valve is an electric gate throttle valve.

[0015] In an embodiment of the present invention, scale lines are arranged on the surface of the crystallizer, and the detection end of the liquid level measuring instrument is horizontally arranged with the scale lines.

[0016] A continuous casting machine includes the above-mentioned mold powder precise addition device.

[0017] The above technical solution of the present invention has the following advantages compared with the prior art:

[0018] For the mold powder precise addition device and the continuous casting machine of the present invention, the liquid level height of the molten steel in the crystallizer is detected by a liquid level detector, and the addition amount of the mold powder is precisely controlled in cooperation with the weighing sensor and the flow control valve, avoiding the influence of the inaccurate addition amount of the mold powder on the fluctuation of the molten steel liquid level in the crystallizer. It ensures uniform heat transfer in the crystallizer and improves the forming quality of the cast slab. Description of the Drawings

[0019] To make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in combination with the attached drawings, wherein

[0020] Figure 1 is the schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is Figure 1 the schematic diagram of the structures of the feeding component and the control component in the middle;

[0022] Figure 3 is Figure 1 the schematic diagram of the conveyor belt in the middle;

[0023] Explanation of the reference numerals in the specification drawings: 1. Feeding component; 2. Control component; 3. Conveyor belt; 11. Feeding hopper; 12. Crystallizer; 13. Feeding pipe; 14. Flange; 21. Flow control valve; 22. Weighing sensor; 23. Liquid level measuring instrument; 24. Control module; 121. Scale line; 31. Driving roller; 32. Driven roller; 33. Driving source. Specific embodiments

[0024] The following further describes the present utility model in combination with the attached drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0025] Embodiment 1

[0026] Referring to Figures 1 - 3 as shown, the present utility model discloses a precise addition device for mold powder, including:

[0027] A feeding component 1, the feeding component 1 includes a feeding hopper 11 and a crystallizer 12, the crystallizer 12 is arranged at the bottom of the hopper, and the discharge port of the feeding hopper 11 is communicated with the crystallizer 12;

[0028] A control component 2, the control component 2 includes a flow control valve 21, a weighing sensor 22 and a liquid level measuring instrument 23, the control valve is arranged at the discharge port of the feeding hopper 11; the weighing sensor 22 is arranged on the outer side of the feeding hopper 11 along the circumferential direction of the hopper, and the detection end of the weighing sensor 22 abuts against the feeding hopper 11; the liquid level sensor is arranged on the outer side of the crystallizer 12, and the detection end of the liquid level sensor faces the crystallizer 12; the liquid level sensor is electrically connected to the weighing sensor 22, and the weighing sensor 22 is electrically connected to the flow control valve 21.

[0029] It can be seen that the charging hopper 11 in the present utility model is used to place the mold powder, and then the mold powder is added from the charging hopper 11 into the mold 12 to lubricate between the mold 12 and the molten steel. The entire control assembly 2 is used to accurately add the mold powder in the charging hopper 11. Specifically, the liquid level measuring instrument 23 is arranged outside the mold 12 to detect the height of the molten steel liquid level inside the mold 12, and the abnormality of the liquid level can reflect the state of the billet in the mold 12. When the liquid level detector detects that the molten steel liquid level is too high, it is judged that the friction force between the billet and the wall of the mold 12 increases, the lubrication is insufficient, and the addition amount of the mold powder in the mold 12 is insufficient. The liquid level measuring instrument 23 feeds back a signal to the host computer, and the host computer controls the flow control valve 21 to open, and cooperates with the weighing sensor 22 to accurately control the addition amount of the mold powder. After the mold powder in the charging hopper 11 is added into the mold 12, the lubrication between the billet and the mold 12 is increased, and the increase in the entire molten steel liquid level caused by the pulling force between the billet and the mold 12 is solved. The lubricity between the billet and the mold 12 is good, which can avoid the surface scratch of the cast steel. Secondly, the heat transfer in the mold 12 is uniform, improving the forming quality of the billet.

[0030] The present utility model detects the height of the molten steel liquid level in the mold 12 through the liquid level detector, and cooperates with the weighing sensor 22 and the flow control valve 21 to accurately control the addition amount of the mold powder, avoiding the influence of inaccurate addition amount of the mold powder on the fluctuation of the molten steel liquid level in the mold. It ensures uniform heat transfer in the mold 12 and improves the forming quality of the billet.

[0031] Further, a feeding pipe 13 is arranged at the discharge port of the charging hopper 11, and both ends of the feeding pipe 13 are respectively connected to the charging hopper 11 and the mold 12.

[0032] Specifically, the feeding pipe 13 in the present utility model is arranged between the discharge port of the charging hopper 11 and the mold 12, mainly playing a guiding role to accurately add the mold powder in the charging hopper 11 into the mold 12.

[0033] As a preferred scheme of the present utility model, the flow control valve 21 is an electric gate throttle valve. During use, the opening degree of the gate is controlled through an electric signal to ensure the accuracy of the addition amount of the mold powder.

[0034] Further, both ends of the flow control valve 21 are detachably connected to the charging hopper 11 and the feeding pipe 13 through a flange 14.

[0035] Specifically, the flow control valve 21 is installed through the flange 14 welded at the discharge port of the charging hopper 11 and the port of the feeding pipe 13. On the one hand, it is convenient for the installation of the flow control valve 21, and on the other hand, it is convenient for the subsequent maintenance of the flow control valve 21.

[0036] Further, the feeding component 1 further includes a conveyor belt 3, the conveyor belt 3 is arranged on the top of the feeding hopper 11, and the output end of the conveyor belt 3 is arranged close to the feeding hopper 11.

[0037] Specifically, the main function of the conveyor belt 3 is to convey the mold powder and convey the mold powder into the feeding hopper 11. Since the mold powder needs to be stored in a dry environment, it is necessary to control the stock of the mold powder in the feeding hopper 11.

[0038] Further, the conveyor belt 3 is internally covered with a driving roller 31 and a driven roller 32, and one end of the driving roller 31 is provided with a driving source 33.

[0039] Specifically, the driving of the conveyor belt 3 requires the driving roller 31 and the driven roller 32 to drive the conveyor belt 3 to rotate, driving the conveyance of the mold powder on the conveyor belt 3. The rotation of the driving roller 31 is driven by the driving source 33. As a preferred solution of the present invention, the driving source 33 is a servo motor. In fact, the addition amount of the mold powder can also be controlled by the rotation speed and rotation interval time of the servo motor.

[0040] Specifically, the control component 2 further includes a control module 24, and the flow control valve 21, the weighing sensor 22, the driving source 33 and the liquid level measuring instrument 23 are all electrically connected to the control module 24.

[0041] Specifically, the control module 24 serves as a host computer, which is used to receive the feedback signals of the control module 24, the flow control valve 21, the weighing sensor 22, the driving source 33 and the liquid level measuring instrument 23, and issue signals to the flow control valve 21 and the driving source 33 according to the information of the feedback signals, so as to realize the automatic opening and closing of the flow control valve 21 and the rotation of the driving source 33.

[0042] Further, scale lines 121 are arranged on the surface of the mold 12, and the detection end of the liquid level measuring instrument 23 is arranged horizontally with the scale lines 121.

[0043] Specifically, the scale lines 121 on the surface of the mold 12 are used to mark the amount of molten iron required for cooling different billets. It is necessary to ensure that the detection end of the liquid level measuring instrument 23 is flush with the scale lines 121, further ensuring the accuracy of the detection value and the accuracy of the addition amount of the mold powder.

[0044] Embodiment 2

[0045] A continuous casting machine includes the mold powder precise addition device described in Embodiment 1.

[0046] In summary, the present utility model introduces a precise addition device for mold powder and a continuous casting machine. The height of the molten steel level inside the mold 12 is detected by a liquid level detector, and the abnormality of the liquid level can reflect the state of the billet in the mold 12. When the liquid level detector detects that the molten steel level is too high, it is judged that the friction between the billet and the wall of the mold 12 increases, the lubrication is insufficient, and the addition amount of the mold powder in the mold 12 is insufficient. The liquid level measuring instrument 23 feeds back a signal to the upper computer, and the upper computer controls the flow control valve 21 to open, and cooperates with the weighing sensor 22 to precisely control the addition amount of the mold powder. After the mold powder in the charging hopper 11 is added into the mold 12, the lubrication between the billet and the mold 12 is increased, and the increase in the entire molten steel level caused by the pulling force between the billet and the mold 12 is solved. The lubricity between the billet and the mold 12 is good, which can avoid the surface scratching of the cast steel. Secondly, the heat transfer in the mold 12 is uniform, improving the forming quality of the billet.

[0047] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A precise adding device for mold slag, characterized in that: include: A feeding assembly, the feeding assembly comprising a feeding hopper and a crystallizer, the crystallizer is arranged at the bottom of the feeding hopper, and the discharge port of the feeding hopper is connected to the crystallizer; A control component, the control component includes a flow control valve, a weighing sensor and a liquid level measuring instrument, the control valve is arranged at the discharge port of the upper hopper; the weighing sensor is arranged on the outer side of the upper hopper along the circumference of the hopper, and the detection end of the weighing sensor is in contact with the upper hopper; the liquid level sensor is arranged on the outer side of the crystallizer, and the detection end of the liquid level sensor is arranged opposite to the crystallizer; the liquid level sensor is electrically connected to the weighing sensor, and the weighing sensor is electrically connected to the flow control valve.

2. The precise mold slag adding device according to claim 1, characterized in that: The discharge port of the upper hopper is provided with a feeding pipe, and the two ends of the feeding pipe are respectively connected to the upper hopper and the crystallizer.

3. The precise adding device for mold slag according to claim 2 is characterized in that: The two ends of the flow control valve are detachably connected to the upper hopper and the feeding pipe via flanges.

4. The precise mold slag adding device according to claim 1, characterized in that: The feeding assembly further comprises a conveyor belt, which is arranged on the top of the feeding hopper, and the output end of the conveyor belt is arranged close to the feeding hopper.

5. The precise adding device for mold slag according to claim 4 is characterized in that: The conveyor belt is internally coated with a driving roller and a driven roller, and a driving source is arranged at one end of the driving roller.

6. The precise adding device for mold slag according to claim 5, characterized in that: The control assembly further comprises a control module, and the flow control valve, the weighing sensor, the driving source and the liquid level measuring instrument are all electrically connected to the control module.

7. The precise mold slag adding device according to claim 1, characterized in that: The flow control valve is an electric gate throttle valve.

8. The precise mold slag adding device according to claim 1, characterized in that: The surface of the crystallizer is provided with scale lines, and the detection end of the liquid level measuring instrument is arranged horizontally with the scale lines.

9. A continuous casting machine, characterized in that: It comprises a precise adding device for protective slag as described in any one of claims 1-8.

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