Secondary cooling device of square billet continuous casting machine

Abstract

The utility model discloses a square billet continuous casting machine secondary cooling device which comprises a water tank, the water tank is arranged on the lower portion of a crystallizer, a blank inlet is formed in the upper end face of the water tank, a blank outlet is formed in the lower end face of the water tank, a water inlet is formed in the side wall of the water tank, and a water outlet is formed in the upper end face of the water tank. The casting blank cooling device can be used for uniformly cooling a casting blank with high strength, is simple in equipment replacement and low in cost, and can be used for efficiently recycling used cooling water and relieving the pressure of subsequent water treatment.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous casting in metallurgical industry, and in particular relates to a secondary cooling device for a square billet continuous casting machine. Background Art

[0002] The secondary cooling of the continuous casting machine generally uses a "spray rack + nozzle" to cool the ingot. Misalignment of the spray rack, blockage or tilting of the nozzle will lead to problems such as de-squareness, core segregation, and bending of the ingot. Frequent replacement of nozzles or spray racks will greatly increase the cost of use.

[0003] There are currently many related technologies for improving the uniformity of cooling of ingots. One is to use gas cooling. There is a related patent "A method for improving the uniformity of cooling of ingots" (application number 202210686638.X), which mainly uses high-pressure and low-temperature inert gas through the nozzle in the secondary cooling chamber to cool the high-temperature ingot; the specific heat capacity of gas is too low compared to liquid, and the cooling intensity is low. For example, the specific heat capacity of air is only about 1 / 3 of that of water; the second is "spray rack + nozzle" water spray cooling, and there is a related patent "Spray device of the secondary cooling system of the continuous casting machine" (application number 202311642992.3). This type of cooling method is prone to spray rack misalignment, nozzle clogging or skewness, resulting in billet quality problems. Frequent replacement of spray racks and nozzles is too expensive, and the subsequent wastewater treatment costs are also high. Utility Model Content

[0004] Technical problems solved: In view of the above technical problems, the utility model provides a secondary cooling device for a square billet continuous casting machine, which can cool the billet with high strength and uniformity. The equipment is simple to replace with low cost, and the used cooling water can be efficiently recycled to reduce the pressure of subsequent water treatment.

[0005] Technical solution: A secondary cooling device for a square billet continuous casting machine comprises a water tank, which is arranged at the lower part of the crystallizer, the upper end face of the water tank is provided with a billet inlet, and the lower end face is provided with a billet outlet, the side wall of the water tank is provided with a water inlet, and the upper end face of the water tank is provided with a water outlet.

[0006] Preferably, a water baffle is provided inside the water tank, and the water baffle is arranged at the lower edge of the water inlet.

[0007] Furthermore, the number of the water inlets is the same as the number of the baffles.

[0008] Preferably, support rollers are provided between the water tanks.

[0009] Preferably, the number of water tanks is set according to the cooling intensity.

[0010] Beneficial effects: The device of the utility model can cool the ingot with high intensity and uniformity, the equipment replacement is simple and low-cost, and the used cooling water can be efficiently recovered to reduce the pressure of subsequent water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural schematic diagram of a secondary cooling device of a square billet continuous casting machine of the utility model;

[0012] Figure 2 It is a schematic diagram of the structure of the water tank;

[0013] Serial numbers in the figure: 1. crystallizer, 2. support roller, 3. water tank, 4. billet, 5. water inlet, 6. water outlet, 7. baffle, 8. billet inlet. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings. Example 1

[0015] Reference Figure 1-Figure 2 A secondary cooling device for a billet continuous casting machine includes a water tank 3, which is arranged at the lower part of a crystallizer 1. The upper end surface of the water tank 3 is provided with a billet inlet 8, and the lower end surface is provided with a billet outlet. The side wall of the water tank 3 is provided with a water inlet 5, and the upper end surface of the water tank 3 is provided with a water outlet 6.

[0016] Three baffles 7 are provided inside the water tank 3 . The baffles 7 are arranged at the lower edge of the water inlets 5 . The number of the water inlets 5 is the same as the number of the baffles 7 .

[0017] Support rollers 2 are arranged between the water tanks 3 to support the ingot 4 and facilitate the ingot 4 to move along the track formed by the water tanks 3 .

[0018] When in use, the billet 4 first passes through the crystallizer 1 for cooling, and then the billet 4 enters the water tank 3 from the billet inlet 8, and the cooling water enters the water tank 3 from the water inlet 5. By increasing the water flow rate, the water spreads to the top of the water tank 3. The water baffle 7 added inside the water tank 3 can prevent the water from flowing away quickly through the gap between the water tank 3 and the billet 4. The water spreads to the top of the water tank 3 and flows out through the water outlet 6, so that the billet 4 is fully in contact with the water and cooled quickly and evenly. The cooling intensity is controlled by controlling the water flow rate and the number of water tanks 3 opened.

[0019] Compared with the existing secondary nozzle cooling of the billet continuous casting machine, this device has the advantages of high cooling intensity, good uniformity control, simple equipment replacement, low cost, and convenient recycling of cooling water.

[0020] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A secondary cooling device for a billet continuous casting machine, characterized in that: It comprises a water tank, which is arranged at the lower part of the crystallizer, the upper end face of the water tank is provided with a blank inlet, and the lower end face is provided with a blank outlet, the side wall of the water tank is provided with a water inlet, and the upper end face of the water tank is provided with a water outlet.

2. A secondary cooling device for a billet continuous casting machine according to claim 1, characterized in that: A water baffle is provided inside the water tank, and the water baffle is arranged at the lower edge of the water inlet.

3. A secondary cooling device for a billet continuous casting machine according to claim 2, characterized in that: The number of the water inlets is the same as the number of the baffles.

4. The secondary cooling device of a billet continuous casting machine according to claim 1, characterized in that: Support rollers are arranged between the water tanks.

5. The secondary cooling device of a billet continuous casting machine according to claim 1, characterized in that: The number of the water tanks is set according to the cooling intensity.

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