Preparation device for rare earth alloy steel material

Abstract

The utility model relates to the technical field of rare earth alloy steel material preparation, in particular to a preparation device for a rare earth alloy steel material, which comprises an electric arc furnace main body, the top cover is used for closing and opening the interior of the electric arc furnace main body by changing the position of the top cover; the electrode group is used for melting to-be-prepared raw materials in the electric arc furnace main body through electrification; the gas inlet device is used for introducing oxygen or carbon into the electric arc furnace main body; the discharging module comprises a discharging opening formed in the bottom of the electric arc furnace body and used for discharging molten metal and a liquid feeding groove way connected with the discharging opening; the powder spraying module comprises a powder sprayer arranged above the liquid feeding groove path and is used for spraying deoxidizing agent powder to the molten metal of the liquid feeding groove path; powder spraying operation is carried out in the metal solution discharging process of the electric arc furnace in the steelmaking field, the powder spraying device can be flexibly adjusted, and then the powder spraying effect of deoxidizing agent powder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rare earth alloy steel material preparation, in particular to a preparation device for rare earth alloy steel material. Background Art

[0002] With the gradual development of modern industrial science and technology, aerospace, military industry, and automobile manufacturing require steel materials to have higher strength and plastic toughness. The traditional steel material preparation technology can no longer meet the needs of modern industry. In recent years, in order to meet the use requirements of different environments, rare earth alloy steel materials have emerged continuously. With the continuous advancement of science and technology and the accelerated advancement of industrialization, its application field and market prospects will be broader. It has excellent mechanical properties, wear resistance, corrosion resistance and high temperature resistance, and has now become an indispensable material in social industrial production. However, in the process of electric arc furnace steelmaking, a method of supplying oxygen to the metal molten pool to oxidize and remove impurities such as carbon, silicon, and phosphorus in the molten iron is adopted. However, in order to strengthen the smelting process of the electric arc furnace, the oxygen consumption per ton of steel is often increased in actual production, resulting in excessive oxygen elements in the molten steel at the end of smelting. In actual production, the method of adding deoxidizers such as block ferrosilicon alloys and silicon-manganese alloys to the ladle during the steelmaking process is often used to pre-deoxidize the molten steel. However, the utilization efficiency of block deoxidizers is low and the consumption is high.

[0003] Chinese patent publication number CN212864832U discloses an automatic deoxidizer spraying system, including a silo, a powder storage tank, a pneumatic conveying pipeline, a nozzle and a pulse dust collector; a feeding port and a dust outlet are arranged on the top of the silo, and the dust outlet is connected to the pulse dust collector through a dust conveying pipeline; a discharge port is arranged at the bottom of the silo, and the discharge port is connected to the feed port of the powder storage tank through a connecting pipeline, and the discharge port of the powder storage tank is connected to a plurality of nozzles through a pneumatic conveying pipeline, and the nozzles are arranged on the water-cooled furnace cover of the LF furnace; a material drying device is arranged in the silo, and the connecting pipeline is flexibly connected to the powder storage tank, and the powder storage tank is provided with a weighing device; the above technical scheme has the following problems: it is impossible to perform powder spraying operation for the metal solution discharging process and it is impossible to adjust the powder spraying device in a targeted manner according to the powder spraying effect. Utility Model Content

[0004] To this end, the utility model provides a preparation device for rare earth alloy steel materials, which is used to overcome the problems in the prior art that powder spraying operation cannot be performed on the metal solution discharging process of the electric arc furnace in the steelmaking field and the powder spraying device cannot be adjusted in a targeted manner according to the powder spraying effect.

[0005] In order to achieve the above object, the utility model provides a preparation device for rare earth alloy steel material, comprising:

[0006] The main body of the electric arc furnace is used to load the raw materials to be prepared;

[0007] A top cover, which is arranged on the top of the electric arc furnace body. The top cover is connected to the electric arc furnace body and is used to realize the closing and opening of the interior of the electric arc furnace body by changing the position of the top cover.

[0008] An electrode group, which includes two preparation electrodes penetrating through the furnace cover and is used to melt the raw materials to be prepared inside the electric arc furnace body by energization.

[0009] An air inlet device, which is arranged on the side wall of the electric arc furnace body and is used to introduce oxygen or carbon into the interior of the electric arc furnace body.

[0010] An exhaust port is also opened on the side wall of the electric arc furnace body and is used to discharge the waste gas generated during the melting process of the raw materials to be prepared.

[0011] A discharging module, which includes a discharging port arranged at the bottom of the electric arc furnace body for discharging the molten metal and a liquid delivery tank path connected to the discharging port.

[0012] A powder spraying module, which includes a powder sprayer arranged above the liquid delivery tank path and is used to spray deoxidizer powder into the molten metal in the liquid delivery tank path.

[0013] Further, the air inlet device is arranged at the central position of the height of the side wall of the electric arc furnace body, and the part of the air inlet device outside the electric arc furnace is inclined away from the horizontal ground and the included angle with the side wall of the electric arc furnace body is 60°.

[0014] Further, the discharging port is provided with a sliding gate for realizing the discharge of the molten metal solution inside the electric arc furnace body by changing its own position height.

[0015] Further, the liquid delivery tank path is an unclosed groove-shaped cuboid structure, and the liquid delivery tank path is made of refractory material.

[0016] Further, the powder spraying module further includes two first connecting rods connected to the outer side wall of the electric arc furnace body. The other ends of the two first connecting rods are respectively and correspondingly fixedly connected with a rod sleeve. The same rotating rod is arranged inside the two rod sleeves, and the rotating rod is connected to the powder sprayer through two second connecting rods.

[0017] Further, the connection between the rotating rod and the two second connecting rods is detachable, and a power device is connected to one end of the rotating rod to provide power for the rotation of the rotating rod.

[0018] Further, a vibration sensor is arranged on the first connecting rod to monitor the vibration frequency of the first connecting rod during the working process of the powder sprayer.

[0019] Further, a powder input port for inputting deoxidizer powder and an air inlet for inputting gas are opened on the powder sprayer. The powder input port is connected to a powder storage tank through a powder delivery pipe, and the powder storage tank is used to store deoxidizer.

[0020] Further, the air inlet is connected to an air compressor through an air duct, and the air compressor is provided with a pressure gauge.

[0021] Further, both of the preparation electrodes are placed on one side of the central axis of the arc furnace body.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model is provided with a powder spraying module. Among them, the second connecting rod is detachably arranged, and the operator can independently select the length of the second connecting rod, thereby changing the height of the powder sprayer. And the operator can adaptively select the powder spraying amount per unit time of the powder sprayer according to the vibration frequency of the first connecting rod measured by the vibration sensor during the powder spraying process, avoiding the problem that the deoxidizer spills out of the liquid delivery pipeline due to the height or powder spraying amount of the powder sprayer, thereby improving the powder spraying effect. Further, it avoids the problem of high consumption of manually adding deoxidizer and improves the utilization efficiency of the deoxidizer.

[0023] Further, the part of the air inlet device of the present utility model placed outside the arc furnace is inclined upward and the included angle with the side wall of the arc furnace body is 60°, which better guides the gas into the arc furnace body and avoids the eddy current phenomenon of the air flow at the inlet, thereby improving the uniformity and stability of the air flow.

[0024] Further, the structure of the liquid delivery tank path in the present utility model is an open groove-shaped cuboid structure. While ensuring the smooth delivery of the molten metal to the ladle, it can make the molten metal spray powder during the discharge process to oxidize and remove impurities such as carbon, silicon, and phosphorus in the molten iron, thereby improving the production efficiency.

[0025] Further, the powder sprayer in the present utility model realizes the change of the angle of the powder sprayer by controlling the operation of the motor, avoiding the problem that the spraying angle cannot be adjusted, making the powder spraying angle of the powder sprayer adjustable and flexible in real time, thereby improving the powder spraying efficiency.

[0026] Further, the present utility model is provided with an air compressor, which provides a stable air flow to the powder storage tank through an air duct, ensuring that the oxidant can be stably supplied to the powder sprayer for powder spraying, and also avoiding the problem that the oxidant is blocked in the powder storage tank or the powder delivery pipe, thereby maintaining the smooth progress of the powder spraying process. Description of the Drawings

[0027] Figure 1 It is a vertical cross-sectional view of the preparation device for rare earth alloy steel materials of the present utility model;

[0028] Figure 2 It is a schematic diagram of the liquid delivery tank path of the present utility model;

[0029] Figure 3Schematic diagram of the powder spraying module of the present utility model;

[0030] In the figure: arc furnace main body 1, exhaust port 2, top cover 3, preparation electrode 4, sliding gate 5, liquid delivery groove path 6, powder sprayer 7, first connecting rod 8, air inlet 9, rotating rod 10, rod sleeve 11, second connecting rod 12, spray port 13, powder delivery port 14, motor 15. Specific embodiments

[0031] In order to make the purpose and advantages of the present utility model clearer, the present utility model will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0033] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] Please refer to Figures 1 to 3 as shown Figure 1 Vertical cross-sectional view of the preparation device for rare earth alloy steel materials of the present utility model; Figure 2 Schematic diagram of the liquid delivery groove path of the present utility model; Figure 3 Schematic diagram of the powder spraying module of the present utility model.

[0035] The present utility model provides a preparation device for rare earth alloy steel materials, including:

[0036] Arc furnace main body 1, used to load the raw materials to be prepared;

[0037] Top cover 3, which is arranged on the top of the arc furnace main body 1. The top cover 3 is connected to the arc furnace main body 1 and is used to realize the closing and opening of the inside of the arc furnace main body 1 by changing the position of the top cover 3;

[0038] An electrode group, which includes two preparation electrodes 4 penetrating through the furnace cover for melting the raw materials to be prepared inside the main body 1 of the electric arc furnace by energization;

[0039] An air inlet device, which is arranged on the side wall of the main body 1 of the electric arc furnace for introducing oxygen or carbon into the main body 1 of the electric arc furnace;

[0040] An exhaust port 2 is also opened on the side wall of the main body 1 of the electric arc furnace for discharging the waste gas generated during the melting process of the raw materials to be prepared;

[0041] A discharging module, which includes a discharging port arranged at the bottom of the main body 1 of the electric arc furnace for discharging the molten metal and a liquid delivery tank path 6 connected to the discharging port;

[0042] A powder spraying module, which includes a powder sprayer 7 arranged above the liquid delivery tank path 6 for spraying deoxidizer powder into the molten metal in the liquid delivery tank path 6.

[0043] Specifically, the air inlet device is arranged at the central position of the height of the side wall of the main body 1 of the electric arc furnace, and the part of the air inlet device outside the electric arc furnace is inclined away from the horizontal ground and the included angle with the side wall of the main body 1 of the electric arc furnace is 60°. The inclined angle can prevent dust and impurities on the ground from being sucked into the furnace, keep the gas in the furnace clean, and reduce oxygen consumption: A large amount of oxygen is required during the steelmaking process in the electric arc furnace. Through the inclined air inlet device, oxygen can be effectively transported into the furnace, reducing the volume of oxygen mixed with air before reaching the furnace, thereby reducing oxygen consumption.

[0044] Specifically, the discharging port is provided with a sliding gate 5 for discharging the molten metal inside the main body 1 of the electric arc furnace by changing its own position height.

[0045] Specifically, the liquid delivery tank path 6 is an open groove-shaped cuboid structure, and the liquid delivery tank path 6 is made of refractory material. For the specific selection of the refractory material, the operator can choose according to the actual application scenario, including but not limited to aluminosilicate refractory material, alumina-magnesia (carbon) quality, magnesia-carbon quality, and magnesia-calcium (carbon) quality.

[0046] Specifically, the powder spraying module further includes two first connecting rods 8 connected to the outer side wall of the main body 1 of the electric arc furnace. The other ends of the two first connecting rods are respectively fixedly connected with a rod sleeve 11, and the same rotating rod 10 is arranged inside the two rod sleeves 11. The rotating rod 10 is connected to the powder sprayer 7 through two second connecting rods 12.

[0047] Specifically, the connection between the rotating rod 10 and the two second connecting rods 12 is detachable. One end of the rotating rod 10 is connected with a power device for providing power for the rotation of the rotating rod 10, and the power device adopts a motor 13.

[0048] The second connecting rod 12 can have different specifications. During the use of second connecting rods 12 with different specifications, the lengths of the parts perpendicular to the ground are different. Operators can select according to the actual application scenarios, thereby flexibly controlling the height of the powder sprayer 7.

[0049] Specifically, a vibration sensor is provided on the first connecting rod 8 for monitoring the vibration frequency of the first connecting rod 8 during the operation of the powder sprayer 7. The specific model of the vibration sensor is not limited, nor is the connection form, as long as the monitoring requirements are met.

[0050] The powder sprayer 7 further includes a connection assembly. The connection assembly includes a connecting member 16 protruding from the side wall of the powder sprayer 7. The connection part between the second connecting rod 12 and the connecting member 16 is a groove structure. Threaded holes are provided both in the groove structure of the second connecting rod 12 and on the connecting member 16 for connecting the second connecting rod 12 to the connecting member 16 of the powder sprayer 7 through bolts matching the threaded holes.

[0051] Specifically, a powder input port 14 for inputting deoxidizer powder and an air inlet 9 for inputting gas are provided on the powder sprayer 7. The powder input port 14 is connected to a powder storage tank through a powder delivery pipe 14, and the powder storage tank is used for storing deoxidizer.

[0052] Specifically, the air inlet 9 is connected to an air compressor through an air duct, and the air compressor is provided with a pressure gauge.

[0053] Specifically, both of the preparation electrodes 4 are placed on one side of the central axis of the electric arc furnace body 1. Concentrating the preparation electrodes 4 on one side can make the electric arc act more concentratedly on the furnace charge, improving the thermal efficiency and heating speed. Moreover, arranging the preparation electrodes 4 on one side of the central axis is convenient for maintenance and replacement, simplifying the operation process.

[0054] The powder storage tank is connected to an air compressor through an air duct. The air compressor is provided with a pressure gauge. The air duct is connected to the air compressor and the powder storage tank respectively through connectors. The specific model of the connector only needs to meet the outlet specifications of the air compressor, the specifications of the air duct, and the specific usage requirements. The specific model of the air compressor is not limited, as long as the production requirements are met; the pressure gauge is connected to the air compressor through a threaded connection interface. The specific model of the pressure gauge is not limited, as long as the monitoring requirements are met.

[0055] Specifically, when the preparation device is in use, the top cover 3 connected to the main body 1 of the electric arc furnace is closed, and the oxygen or carbon is introduced into the interior of the main body 1 of the electric arc furnace by opening the air inlet device. When the preparation electrode 4 in the electrode group is energized, the metal inside the main body 1 of the electric arc furnace melts into a metal melt. Among them, the operator opens the exhaust port 2 according to the actual situation to discharge the waste gas generated during the melting process of the raw material to be prepared. When discharging the material, the sliding gate 5 is opened to discharge the metal melt through the liquid delivery trough path 6. A ladle for receiving the metal solution is arranged at the end of the liquid delivery direction of the liquid delivery trough path 6. The powder injector 7 above the liquid delivery trough path 6 sprays the deoxidizer powder into the metal melt in the liquid delivery trough path 6. During this process, the vibration sensor monitors the vibration frequency of the first connecting rod 8 in real time;

[0056] Among them, it can be understood that the greater the operating power of the air compressor, the more likely the powder injector 7 is to vibrate, resulting in the scattered deoxidizer powder outside the liquid delivery trough path, affecting the powder spraying effect. Therefore, the operator can grasp the vibration frequency of the first connecting rod 8 in real time according to the value monitored by the vibration sensor, and then autonomously adjust the power of the air compressor according to the vibration frequency, thereby improving the powder spraying effect.

[0057] The selection of the deoxidizer powder is set by the operator according to the actual application scenario; the selection of the raw material to be prepared is selected by the operator according to the required steel grade characteristics and physical properties. The raw material to be prepared includes but is not limited to scrap steel, pig iron, rare earth metals, and alloying elements.

[0058] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

[0059] The above are only the preferred embodiments of the present invention and are not used to limit the present invention; for those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preparation device for rare earth alloy steel materials, characterized in that, Including: An electric arc furnace body for loading raw materials to be prepared; A top cover which is arranged at the top of the electric arc furnace body, and the top cover is connected to the electric arc furnace body, and is used to realize the closing and opening of the inside of the electric arc furnace body by changing the position of the top cover; An electrode group which includes two preparation electrodes penetrating through the furnace cover and is used to melt the raw materials to be prepared inside the electric arc furnace body by electrifying; An air inlet device which is arranged on the side wall of the electric arc furnace body and is used to introduce oxygen or carbon into the inside of the electric arc furnace body; An exhaust port is also opened on the side wall of the electric arc furnace body and is used to discharge the waste gas generated during the melting process of the raw materials to be prepared; A discharging module which includes a discharging port arranged at the bottom of the electric arc furnace body for discharging molten metal and a liquid delivery tank path connected to the discharging port; A powder spraying module which includes a powder sprayer arranged above the liquid delivery tank path and is used to spray deoxidizer powder into the molten metal in the liquid delivery tank path.

2. The preparation device for rare earth alloy steel materials according to claim 1, characterized in that The air inlet device is arranged at the central position of the height of the side wall of the electric arc furnace body, and the part of the air inlet device outside the electric arc furnace is inclined away from the horizontal ground and the included angle with the side wall of the electric arc furnace body is 60°.

3. The preparation device for rare earth alloy steel materials according to claim 2, characterized in that, The discharging port is provided with a sliding gate for realizing the discharge of the molten metal inside the electric arc furnace body by changing its own position height.

4. The preparation device for rare earth alloy steel materials according to claim 1, wherein, The liquid delivery tank path is an unclosed groove-shaped cuboid structure, and the liquid delivery tank path is made of refractory material.

5. The preparation device for rare earth alloy steel materials according to claim 1, characterized in that, The powder spraying module also includes two first connecting rods connected to the outer side wall of the electric arc furnace body. The other ends of the two connecting rods are respectively fixedly connected with a rod sleeve, and the same rotating rod is arranged in the two rod sleeves. The rotating rod is connected to the powder sprayer through two second connecting rods.

6. The preparation device for rare earth alloy steel materials according to claim 5, characterized in that, The connection between the rotating rod and the two second connecting rods is detachable. One end of the rotating rod is connected with a power device for providing power for the rotation of the rotating rod.

7. The preparation device for rare earth alloy steel materials according to claim 6, characterized in that, A vibration sensor is arranged on the first connecting rod for monitoring the vibration frequency of the first connecting rod during the working process of the powder sprayer.

8. The preparation device for rare earth alloy steel materials according to claim 7, characterized in that, The powder sprayer is provided with a powder input port for inputting deoxidizer powder and an air inlet for inputting gas. The powder input port is connected to a powder storage tank through a powder delivery pipe, and the powder storage tank is used to store deoxidizer.

9. The preparation device for rare earth alloy steel materials according to claim 8, characterized in that, The air inlet is connected to an air compressor through an air duct, and the air compressor is provided with a pressure gauge.

10. The preparation device for rare earth alloy steel materials according to claim 7, wherein, Both of the two preparation electrodes are arranged on one side of the central axis of the electric arc furnace body.

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