Cooling device for ESP continuous casting cast-on head blank

Abstract

The utility model provides an ESP continuous casting cast-on head blank cooling device, which aims to improve the head blank cooling rate and reduce the cast-on accident rate, comprises a crystallizer, a dummy bar head and a T-shaped block, and is characterized in that the T-shaped block is provided with a mounting hole used for being fixedly connected with the dummy bar head, and the middle part of the upper end of the T-shaped block is provided with a notch; the lower end face of the notch is flush with the upper end face of the dummy bar head, and a scrap iron layer, a wood shaving layer and a reserved layer are arranged in the notch from bottom to top. The plugging steel sheet is arranged above the wood shaving layer on the dummy bar head and located on the outer side of the T-shaped block; by means of the device, the head blank cooling rate can be effectively increased, and the stability of casting starting of an ESP production line is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting starting devices, and particularly relates to an ESP continuous casting starting billet cooling device. Background Art

[0002] After the existing thin slab starting ingot rod is sent to the mold, rock wool is used to block and clamp the four sides, and the molten steel is cooled by the contact method of a solid T-shaped block. This method has a low cooling rate and poor effect, and there is a risk of breakout due to insufficient cooling of the starting billet. Content of the Utility Model

[0003] The purpose of the utility model is to improve the cooling rate of the starting billet and reduce the starting accident rate.

[0004] In order to achieve the above purpose, the utility model provides an ESP continuous casting starting billet cooling device, and the adopted technical scheme is as follows:

[0005] An ESP continuous casting starting billet cooling device, including a mold, a starting ingot head, and a T-shaped block, is characterized in that:

[0006] The T-shaped block is provided with a mounting hole for fixedly connecting with the starting ingot head, a notch is arranged in the middle of the upper end thereof, the lower end surface of the notch is flush with the upper end surface of the starting ingot head, and an iron chip layer, a wood chip layer, and a reserved layer are arranged in the notch from bottom to top;

[0007] A sealing steel sheet is arranged above the wood chip layer on the starting ingot head and is located outside the T-shaped block;

[0008] A sealing cotton rope is arranged between the starting ingot head and the inner wall of the mold copper plate.

[0009] Further, the thickness of the wood chip layer is greater than the thickness of the iron chip layer.

[0010] Further, the height of the reserved layer is greater than the wood chip layer.

[0011] Further, the wood chip layer is made of alloy steel with a carbon content of 0.4% - 0.75%, the diameter of the wood chip particles is 10mm - 20mm, the length is 10mm - 20mm, and the density is 1.2g / cm3 - 1.7g / cm3.

[0012] Further, the thickness of the wood chip layer is 22 - 25mm.

[0013] Further, the length of the iron chips in the iron chip layer is < 8mm, the diameter is < 3mm, and the density is 3.8g / cm3 - 4.3g / cm3.

[0014] Further, the thickness of the iron chip layer is 20mm.

[0015] Further, the distance between the lower end face of the reserved layer and the upper end face of the T-shaped block is 37-40 mm.

[0016] Further, an inclined surface is provided on the upper part of the side surface of the dummy bar head at one end of the mold discharge port.

[0017] Further, the connection gap between the T-shaped block and the dummy bar head is ≤ 0.5 mm.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. Through the notch provided at the upper end of the middle part of the T-shaped block, an iron filings layer and a wood shavings layer can be laid, and a reserved layer is provided above the wood shavings layer to ensure that there is enough height between the upper end face of the T-shaped block and the upper part of the wood shavings layer for molten steel to pass through, ensuring its cooling effect. After the molten steel solidifies, it is connected to the T-shaped block, and when starting the straightening, the head billet is pulled out of the mold;

[0020] 2. The thickness of the wood shavings layer is greater than that of the iron filings layer, which is beneficial to improving the cooling effect of the wood shavings layer and strengthening the strength of the primary billet shell;

[0021] 3. By optimizing the gap between the T-shaped block and the dummy bar head, the structure of the two-layer filling + reserved layer of the T-shaped block, the iron filings quantification, the wood shavings quantification, the steel plugging sheet and other measures for the starting casting of the ESP production line, the cooling rate of the head billet is increased, and the 100% success rate of the starting casting of the ESP production line is achieved. Description of the Drawings

[0022] Figure 1 It is a schematic top view of the structure of the present utility model

[0023] Figure 2 It is a front view of the structure of the present utility model

[0024] Figure 3 It is a front view of the T-shaped block structure

[0025] Figure 4 It is a sectional view of the T-shaped block

[0026] Among them, 1 - wide face copper plate of the mold, 2 - narrow face copper plate of the mold, 3 - T-shaped block, 301 - mounting hole, 302 - notch, 303 - inclined surface, 4 - iron filings layer, 5 - wood shavings layer, 6 - reserved layer, 7 - steel plugging sheet, 8 - paper rope for plugging, 9 - dummy bar head. Specific Embodiments

[0027] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0028] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the view direction or positional relationship, and is only for the convenience of describing the utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the utility model.

[0029] As Figures 1 - 4 shown, an ESP continuous casting starting billet cooling device includes a mold, a dummy bar head 9, and a T-shaped block 3. The T-shaped block 3 is arranged at the bottom of the mold and fixedly connected to the dummy bar head 9. A plugging paper rope 8 is arranged between the dummy bar head 9, the wide face copper plate 1 of the mold, and the narrow face copper plate 2 of the mold. An iron filings layer 4 and a shaving layer 5 are sequentially laid from bottom to top above the dummy bar head 9. Above the shaving layer 5, multiple groups of plugging steel sheets 7 are arranged, and the plugging steel sheets 7 are located outside the T-shaped block 3.

[0030] Specifically, the structure of the T-shaped block 3 is as Figure 3 and Figure 4 shown. The longitudinal section is T-shaped, and the thickness is the thickness of the billet - 60 mm. The connection gap between the T-shaped block 3 and the dummy bar head 9 is ≤ 0.5 mm. Two groups of mounting holes 301 distributed through the thickness direction are arranged at the lower part of the T-shaped block 3. The T-shaped block 3 is fixedly connected to the dummy bar head 9 after a pin shaft passes through the mounting holes 301. At the upper end of the middle part of the longitudinal section of the T-shaped block 3, there is a notch 302. When the dummy bar head 9 and the T-shaped block 3 are in the installed state, the lower end face of the notch 302 is flush with the upper end face of the dummy bar head 9. The notch 302 is sequentially an iron filings layer 4, a shaving layer 5, and a reserved layer 6 from bottom to top. When the T-shaped block 3 and the dummy bar head 9 are in the installed state, an iron filings layer 4 and a shaving layer 5 are sequentially laid from bottom to top above the dummy bar head 9, and the iron filings layer 4 and the shaving layer 5 are also located in the notch 302. And the thickness of the shaving layer 5 is greater than that of the iron filings layer 4 to ensure its cooling effect. The distance between the upper end face of the shaving layer 5, that is, the lower end face of the reserved layer 6, and the upper end face of the T-shaped block 3 is 37 - 40 mm. The height of the reserved layer 6 is greater than the thickness of the shaving layer 5. By setting the reserved layer 6, it is ensured that there is enough space above the shaving layer 5 for molten steel to flow in to improve its cooling efficiency. After the molten steel solidifies, it is connected to the T-shaped block, and when straightening, the starting billet is pulled out of the mold.

[0031] In addition, as Figure 4 shown, an inclined surface 303 is arranged at the upper end of the right side surface of the T-shaped block 3, that is, the side far from the dummy bar head 9. Through the arrangement of the inclined surface 303, it is convenient to slow down the flow rate of the molten steel and reduce the impact on the shaving layer.

[0032] In this embodiment, the specific implementation is as follows:

[0033] First, as shown in Figure 1 and Figure 2 , send the dummy bar head 9 to a position 970 mm from the lower edge inside the mold. Use compressed air to clean the oil stains and water stains on the surfaces of the dummy bar head 9 and the T-shaped block 3. Clamp the mold, and use the plugging paper rope 8 to plug the gap between the dummy bar head 9 and the inner wall of the mold copper plate. The wide surface paper rope is used between the plugging paper rope 9 and the wide surface copper plate 1 of the mold, and its length is the width of the lower opening of the mold + 500 mm. The narrow surface paper rope is used between the plugging paper rope 9 and the narrow surface copper plate 2 of the mold, and its length is 110 mm.

[0034] Then, as shown in Figure 3 , use a measuring tool with a specification of 100 mm * 100 mm * 50 mm, fill it with flat-bottomed hopper iron filings, and evenly sprinkle them above the dummy bar head 9 inside the mold. The length of the iron filings < 8 mm, the diameter < 3 mm, and the density is 3.8 g / cm 3 -4.3 g / cm 3 . After using a special tool to flatten it, measure to ensure that the thickness of the iron filings is 20 mm.

[0035] Next, spread steel shavings above the iron filings layer 4. The steel shavings are made of alloy steel with a carbon content of 0.4% - 0.75%. The diameter of the shaving particles is 10 mm - 20 mm, the length is 10 mm - 20 mm, and the density is 1.2 g / cm 3 -1.7 g / cm 3 . After spreading, ensure that the thickness of the shaving layer 5 is 22 - 25 mm.

[0036] Finally, place the plugging steel sheet 7 above the shaving layer 5. The steel sheet is 200 mm long, 20 mm wide, and 1 mm thick. The material is low carbon (C content < 0.04%) and low silicon (Si content < 0.05%). Two plugging steel sheets 7 are placed between the T-shaped block 3 and the narrow surface copper plate 2 of the mold, and four plugging steel sheets 7 are placed between the T-shaped block 3 and the wide surface copper plate 1 of the mold. Finally, place the cooling rack on the T-shaped block 3.

[0037] This solution effectively improves the cooling rate of the first billet and realizes the stable starting of the ESP production line by optimizing the gap between the T-shaped block 3 and the dummy bar head 9, the three-layer structure inside the notch 302 of the T-shaped block 3, the iron filings quantification, the shaving quantification, the plugging steel sheet, etc. Currently, the starting success rate is 100%.

[0038] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. An ESP continuous casting pouring head billet cooling device, comprising a crystallizer, a starter head, and a T-block, characterized in that: A T-shaped block, wherein a mounting hole for fixed connection with the starter head is provided on the T-shaped block, a notch is provided in the middle of the upper end thereof, the lower end surface of the notch is flush with the upper end surface of the starter head, and an iron filing layer, a shaving layer and a reserved layer are provided in the notch from bottom to top; The plugging steel sheet is arranged above the shaving layer on the dummy head and outside the T-block; The sealing cotton rope is arranged between the ingot starter and the inner wall of the copper plate of the crystallizer.

2. The ESP continuous casting pouring head billet cooling device according to claim 1, characterized in that: The thickness of the wood shavings layer is greater than the thickness of the iron filings layer.

3. The ESP continuous casting pouring head billet cooling device according to claim 1 or 2, characterized in that: The height of the reserved layer is greater than the thickness of the wood shaving layer.

4. The ESP continuous casting pouring head billet cooling device according to claim 1, characterized in that: The shavings layer is made of alloy steel with a carbon content of 0.4% to 0.75%, and the diameter of the shavings particles is 10 mm to 20 mm and the length is 10 mm. - 20mm, density 1.2g / cm 3 ~1.7g / cm 3 .

5. The ESP continuous casting pouring head billet cooling device according to claim 1 or 4, characterized in that: The thickness of the wood shavings layer is 22 to 25 mm.

6. The ESP continuous casting pouring head billet cooling device according to claim 1, characterized in that: The length of the iron chips in the iron chip layer is less than 8 mm, the diameter is less than 3 mm, and the density is 3.8 g / cm 3 ~4.3g / cm 3 .

7. The ESP continuous casting pouring head billet cooling device according to claim 1 or 6, characterized in that: The thickness of the iron filings layer is 20 mm.

8. The ESP continuous casting pouring head billet cooling device according to claim 1, characterized in that: The distance between the lower end surface of the reserved layer and the upper end surface of the T-block is 37-40 mm.

9. The ESP continuous casting pouring head billet cooling device according to claim 1, characterized in that: An inclined surface is arranged on the upper part of the side surface of the ingot starter head at one end of the crystallizer discharge port.

10. The ESP continuous casting pouring head billet cooling device according to claim 1, characterized in that: The connection gap between the T-block and the ingot starter is ≤0.5mm.

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