Removal device for removing gas in metal liquid

Abstract

The utility model relates to the technical field of metal smelting equipment, and discloses a removing device for removing gas in metal liquid, which comprises a shell, a vacuum pump is arranged at the top in the shell, an inflating device is arranged in the shell, and a waste heat treatment device is arranged at the right end of the shell. According to the removing device for removing the gas in the metal liquid, the storage tank is opened, inert gas is conveyed to the gas distributor through the gas conveying pipe, the gas distributor evenly exhausts gas, the inert gas enters the metal liquid in the shell, then a motor is started, the motor drives a connecting shaft to rotate, the connecting shaft drives a partition net and stirring blades to rotate, and the gas in the metal liquid is removed. The inert gas is subjected to small bubble cutting treatment through the cutting net, the contact area between the bubble surface and the metal solution is increased, the metal solution is stirred through the stirring blades, and therefore the effects that the contact area between the inert gas and the metal solution is increased conveniently, and then the efficiency of removing the gas in the metal solution is improved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of metal smelting equipment, and specifically relates to a removing device for removing gases in molten metal. Background Technique

[0002] An important step in metal smelting is to remove the gases in the molten metal. Gases dissolved in the molten metal, such as hydrogen and nitrogen, will form bubbles or pores during the solidification process of the metal, resulting in a decrease in the density of the metal material, thereby reducing its mechanical properties, such as strength and toughness. The presence of gases in the metal also easily causes various defects, such as white spots, hair cracks, segregation, etc., and these defects will further affect the service performance and lifespan of the metal.

[0003] In the prior art, the molten metal is usually placed in a vacuum environment through a vacuum pump, so that the gases dissolved in it quickly escape under the action of the pressure difference, or an inert gas (such as argon) is introduced into the molten metal, and the gases dissolved in the molten metal are discharged through the stirring and carrying action of the bubbles. However, when introducing the inert gas, the bubbles are too large, thereby reducing the contact area with the molten metal and lowering the gas removal efficiency.

[0004] Therefore, we propose a removing device for removing gases in molten metal to solve the problem that in the prior art, when using an inert gas to remove gases in molten metal, the contact area between the inert gas and the molten metal is small, resulting in a reduction in gas removal efficiency. Content of the Utility Model

[0005] The purpose of the utility model is to provide a removing device for removing gases in molten metal, so as to solve the problem that in the above-mentioned background technique, when using an inert gas to remove gases in molten metal in the prior art, the contact area between the inert gas and the molten metal is small, resulting in a reduction in gas removal efficiency.

[0006] To solve the above technical problems, the utility model provides the following technical solution: A removing device for removing gases in molten metal, including a housing, a vacuum pump is installed at the inner top of the housing, an air filling device is arranged inside the housing, and a waste heat treatment device is arranged at the right end of the housing;

[0007] The air filling device includes a storage tank, an air delivery pipe is fixedly connected to the upper end of the storage tank, the other end of the air delivery pipe is fixedly connected to a gas distributor, a motor is fixedly connected to the inner bottom of the gas distributor, a connecting shaft is fixedly connected to the upper end of the motor, a dividing net is fixedly connected to the bottom of the connecting shaft, and stirring blades are fixedly connected to the outer surface of the connecting shaft.

[0008] Preferably, a sealing plate is fixedly connected inside the housing, and heating elements are installed on the inner side wall of the housing.

[0009] Preferably, the gas pipeline penetrates through the left bottom of the housing and is fixedly connected to the housing, and the gas distributor is of a hollow structure.

[0010] Preferably, the motor is fixedly connected to the bottom of the housing, the connecting shaft penetrates through the housing and is rotatably connected to the housing, and the outer surface of the dividing net is attached to the inner side wall of the housing.

[0011] Preferably, the waste heat treatment device includes a water tank, an air inlet is fixedly connected to the left end of the water tank, a heat exchange tube is fixedly connected to the right end of the air inlet, the other end of the heat exchange tube is fixedly connected to an air outlet, a plurality of downcomers are fixedly connected to the lower end of the heat exchange tube, the lower end of the downcomer is fixedly connected to a recovery tank, and filter nets are installed inside both the air inlet and the air outlet.

[0012] Preferably, the left end of the air inlet is fixedly connected to the exhaust port of the vacuum pump, and the heat exchange tube is of a vertical wavy structure.

[0013] Preferably, the downcomer penetrates through the bottom of the water tank, and the recovery tank is located below the water tank.

[0014] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0015] First, in the present utility model, by opening the storage tank, the inert gas is transmitted to the gas distributor through the gas pipeline, and the gas distributor exhausts the gas evenly, so that the inert gas enters the molten metal in the housing. Then, by starting the motor, the motor drives the connecting shaft to rotate, the connecting shaft drives the dividing net and the stirring blades to rotate, the dividing net cuts the inert gas into small bubbles, increasing the contact area between the bubble surface and the molten metal, and the stirring blades stir the molten metal, making the molten metal inside the housing flow, increasing the contact with the inert gas, thereby achieving the effect of facilitating the improvement of the contact area between the inert gas and the molten metal, and further improving the efficiency of removing gas from the molten metal.

[0016] Second, in the present utility model, the gas extracted by the vacuum pump has a large amount of hot gas, which is transported through the air inlet into the heat exchange tube to exchange heat with the water in the water tank, and then discharged from the air outlet. The filter net conducts a filtering operation to heat the water. The water droplets condensed from the hot gas after heat exchange fall into the recovery tank along the downcomer for recovery treatment, thereby achieving the effect of facilitating waste heat utilization and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0018] Figure 2 is a three-dimensional sectional structure schematic diagram of the present utility model;

[0019] Figure 3 is the structure of the present utility model Figure 2 Schematic enlarged view of part A in it;

[0020] Figure 4 is the schematic cross-sectional view of the water tank of the structure of the present utility model.

[0021] Wherein: 1. housing; 11. sealing plate; 2. vacuum pump; 3. gas charging device; 301. storage tank; 302. gas transmission pipe; 303. gas distributor; 304. motor; 305. connecting shaft; 306. dividing net; 307. stirring blade; 4. waste heat treatment device; 401. water tank; 402. air inlet; 403. heat exchange pipe; 404. air outlet; 405. downcomer; 406. recovery tank; 407. filter screen. Specific implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] The present utility model provides the following technical solutions:

[0024] Embodiment 1

[0025] Please refer to Figures 1-3 , a gas removal device for removing gas in molten metal, including a housing 1, a vacuum pump 2 is installed at the inner top of the housing 1, a gas charging device 3 is arranged inside the housing 1, and a waste heat treatment device 4 is arranged at the right end of the housing 1;

[0026] The gas charging device 3 includes a storage tank 301, an upper end of the storage tank 301 is fixedly connected with a gas transmission pipe 302, the other end of the gas transmission pipe 302 is fixedly connected with a gas distributor 303, a motor 304 is fixedly connected to the inner bottom of the gas distributor 303, an upper end of the motor 304 is fixedly connected with a connecting shaft 305, a dividing net 306 is fixedly connected to the bottom of the connecting shaft 305, and stirring blades 307 are fixedly connected to the outer surface of the connecting shaft 305.

[0027] Through the above technical solution, a vacuum pump 2 is used to evacuate the metal solution inside the housing 1. The storage tank 301 is used to store inert gas. The storage tank 301 is opened, and the inert gas is transmitted to the gas distributor 303 through the gas pipeline 302. The gas distributor 303 exhausts the gas evenly, so that the inert gas enters the metal solution inside the housing 1. Then, by starting the motor 304, the motor 304 drives the connecting shaft 305 to rotate, the connecting shaft 305 drives the dividing net 306 and the stirring blades 307 to rotate. The dividing net 306 cuts the inert gas into small bubbles, increasing the contact area between the bubble surface and the metal solution, causing the inert gas to carry the gas in the metal solution to rise. The stirring blades 307 stir the metal solution, making the metal solution inside the housing 1 flow, increasing the contact with the inert gas, so as to facilitate increasing the contact area between the inert gas and the metal solution, and further improving the efficiency of removing gas from the metal solution.

[0028] Specifically, a sealing plate 11 is fixedly connected inside the housing 1, and a heating element is installed on the inner side wall of the housing 1.

[0029] Through the above technical solution, by setting the sealing plate 11, the housing 1 is divided into a vacuum chamber and a metal heating chamber, and the metal is heated by the heating element.

[0030] Specifically, the gas pipeline 302 penetrates through the left bottom of the housing 1 and is fixedly connected to the housing 1. The gas distributor 303 is of a hollow structure.

[0031] Through the above technical solution, the gas pipeline 302 delivers the inert gas to the bottom of the housing 1, and the inert gas is evenly discharged through the gas distributor 303.

[0032] Specifically, the motor 304 is fixedly connected to the bottom of the housing 1, the connecting shaft 305 penetrates through the housing 1 and is rotatably connected to the housing 1, and the outer surface of the dividing net 306 is attached to the inner side wall of the housing 1.

[0033] Through the above technical solution, the dividing net 306 is attached to the inner side wall of the housing 1, preventing air bubbles from passing through the gap between the dividing net 306 and the housing 1, and thoroughly dividing the large air bubbles of the inert gas to form a large number of small air bubbles.

[0034] Embodiment 2

[0035] Please refer to Figure 1 and Figure 4, and on the basis of the first embodiment, it is further obtained that: the waste heat treatment device 4 includes a water tank 401. The left end of the water tank 401 is fixedly connected with an air inlet 402. The right end of the air inlet 402 is fixedly connected with a heat exchange tube 403. The other end of the heat exchange tube 403 is fixedly connected with an air outlet 404. The lower end of the heat exchange tube 403 is fixedly connected with a plurality of downcomers 405. The lower end of the downcomer 405 is fixedly connected with a recovery tank 406. Filter meshes 407 are installed inside both the air inlet 402 and the air outlet 404.

[0036] Through the above technical solution, the gas extracted by the vacuum pump 2 has a large amount of hot air, which is transported through the air inlet 402 into the heat exchange tube 403 to conduct heat exchange with the water in the water tank 401, and then discharged from the air outlet 404. The filtering operation is carried out by the filter mesh 407 to heat the water. The water droplets condensed from the hot air after heat exchange fall into the recovery tank 406 along the downcomer 405 for recovery treatment, so as to achieve the effect of facilitating waste heat utilization and saving energy.

[0037] Specifically, the left end of the air inlet 402 is fixedly connected with the exhaust port of the vacuum pump 2, and the heat exchange tube 403 is arranged in a vertical wavy structure.

[0038] Through the above technical solution, the heat exchange tube 403 is arranged in a wavy structure, which increases the contact area with the water inside the water tank 401 and improves the heat exchange efficiency.

[0039] Specifically, the downcomer 405 penetrates through the bottom of the water tank 401, and the recovery tank 406 is located below the water tank 401.

[0040] Although the specific embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these specific embodiments without departing from the principle and spirit. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for removing gas from liquid metal, comprising a housing (1), a vacuum pump (2) being installed at the top of the housing (1), and characterized in that: An air charging device (3) is provided inside the shell (1), and a residual heat treatment device (4) is provided at the right end of the shell (1); The inflation device (3) comprises a storage tank (301), the upper end of the storage tank (301) is fixedly connected to a gas supply pipe (302), the other end of the gas supply pipe (302) is fixedly connected to a gas distributor (303), the inner bottom of the gas distributor (303) is fixedly connected to a motor (304), the upper end of the motor (304) is fixedly connected to a connecting shaft (305), the bottom of the connecting shaft (305) is fixedly connected to a dividing net (306), and the outer surface of the connecting shaft (305) is fixedly connected to a stirring blade (307).

2. The device for removing gas from liquid metal according to claim 1, characterized in that: A sealing plate (11) is fixedly connected to the interior of the shell (1), and a heating element is installed on the inner side wall of the shell (1).

3. The device for removing gas from liquid metal according to claim 1, characterized in that: The gas delivery pipe (302) passes through the left bottom of the shell (1) and is fixedly connected to the shell (1), and the gas distributor (303) is configured as a hollow structure.

4. The device for removing gas from liquid metal according to claim 1, characterized in that: The motor (304) is fixedly connected to the bottom of the shell (1), the connecting shaft (305) passes through the shell (1) and is rotationally connected to the shell (1), and the outer surface of the dividing net (306) is in contact with the inner wall of the shell (1).

5. The device for removing gas from liquid metal according to claim 1, characterized in that: The waste heat treatment device (4) comprises a water tank (401), the left end of the water tank (401) is fixedly connected to an air inlet (402), the right end of the air inlet (402) is fixedly connected to a heat exchange tube (403), the other end of the heat exchange tube (403) is fixedly connected to an air outlet (404), the lower end of the heat exchange tube (403) is fixedly connected to a plurality of downpipes (405), the lower end of the downpipe (405) is fixedly connected to a recovery box (406), and filter screens (407) are installed inside the air inlet (402) and the air outlet (404).

6. The device for removing gas from liquid metal according to claim 5, characterized in that: The left end of the air inlet (402) is fixedly connected to the exhaust port of the vacuum pump (2), and the heat exchange tube (403) is configured as a vertical wavy structure.

7. The device for removing gas from liquid metal according to claim 5, characterized in that: The downcomer pipe (405) runs through the bottom of the water tank (401), and the recovery tank (406) is located below the water tank (401).

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