Closed system for electrolyzing rare earth metal

Abstract

A closed system for electrolyzing rare earth metal belongs to the technical field of equipment for electrolyzing rare earth metal, and comprises a wall body forming a closed space, a door and a ventilation pipeline which are arranged on the wall body, and a sealing device positioned in the closed space, the sealing device comprises a rear fan cover, a left fan cover, a right fan cover, a fixing device, a telescopic pneumatic device and a suction pipeline, the rear fan cover is connected with the telescopic pneumatic device through the fixing device, the telescopic pneumatic device is connected with the suction pipeline, and the rear fan cover, the left fan cover and the right fan cover are placed on the upper surface of the electrolytic furnace body; the rear fan cover, the left fan cover and the right fan cover are combined together to form a sealing cover, and a cathode component hole is formed in the upper portion of the sealing cover. According to the utility model, dust, carbon monoxide, carbon dioxide and fluorine-containing waste gas can be prevented from overflowing and diffusing during stirring, feeding and discharging operations; the suction resistance and fan energy consumption can be reduced, meanwhile, the temperature in the seal can be reduced, and the service life of the magnetic suction sealing strip is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrolytic rare earth metal equipment and relates to a closed system for electrolyzing rare earth metal. Background Art

[0002] The fluoride molten salt electrolysis method for producing rare earth metals uses fluoride-lithium fluoride as the molten salt system, oxides as raw materials, graphite anodes, and electrolysis temperatures of 950-1200°C. Carbon monoxide, carbon dioxide, and fluorine-containing waste gas are produced during the electrolysis process, accompanied by a small amount of smoke and dust. Traditional waste gas collection uses a top or side waste gas collection device to collect waste gas, and then neutralizes the waste gas by spraying alkaline solution. The electrolysis process requires stirring, feeding, and discharging. Since the electrolytic furnace body is not fully enclosed, dust, carbon monoxide, carbon dioxide, and fluorine-containing waste gas overflow from the top or side of the electrolytic furnace, thus affecting the electrolysis operating environment.

[0003] The Chinese utility model patent with announcement number CN218465968U discloses a split fully enclosed sealing cover and a fully enclosed electrolytic furnace. Through the split design, the telescopic pneumatic device drives the rear hood and the left hood to move forward and backward, which is convenient for the furnace to be discharged and convenient for the operator to operate; the rear hood, the left hood and the right hood are combined to form a fully enclosed sealing cover, so that the production is carried out in a relatively closed atmosphere. This split fully enclosed sealing cover has achieved good technical effects in collecting electrolytic dust and waste gas generated during the electrolysis process, but after long-term use, the following technical problems arise: when the technical solution is stirring, feeding and discharging, it is necessary to open the left hood and the right hood, resulting in the inability to completely absorb the dust, carbon monoxide, carbon dioxide and fluorine-containing waste gas generated by electrolysis, causing waste gas overflow. In particular, when the left hood and the right hood are opened during electrolysis, dust, carbon monoxide, carbon dioxide and fluorine-containing waste gas overflow, causing damage to the operator's body. In addition, the device is fully closed during normal operation, resulting in large suction resistance and high fan energy consumption. At the same time, the internal temperature of the device is too high, which affects the life of the magnetic sealing strip. Frequent replacement of the magnetic sealing strip increases production costs.

[0004] A new closed system for electrolyzing rare earth metals is needed to solve the above-mentioned technical problems existing in the prior art. Summary of the invention

[0005] As an improved technical solution of CN218465968U, the utility model provides a closed system for electrolyzing rare earth metals to solve the technical problems existing in CN218465968U. The specific technical solution of the utility model is as follows.

[0006] A closed system for electrolyzing rare earth metals comprises a wall constituting a closed space, a door and a ventilation duct arranged on the wall, and a sealing device located in the closed space, wherein the ventilation duct is provided with an air supply port, and the sealing device comprises a rear air hood, a left air hood, a right air hood, a fixing device, a telescopic pneumatic device and a suction duct, wherein the rear air hood is connected to the telescopic pneumatic device via the fixing device, the telescopic pneumatic device is connected to the suction duct, the rear air hood, the left air hood and the right air hood are placed on the upper surface of the electrolytic furnace body, the rear air hood, the left air hood and the right air hood are combined together to form a sealing hood, and a cathode component hole is provided above the sealing hood.

[0007] The utility model forms a closed space through the wall. When stirring, feeding and discharging operations are performed, since the electrolytic furnace and the sealing cover are in the closed space, the gas and dust overflowing after the left and right air hoods are opened will still be sucked away by the suction pipe and will not spread to other areas of the production workshop.

[0008] Furthermore, ventilation holes are provided on the left and right hoods. By providing ventilation holes on the left and right hoods, the suction resistance and the energy consumption of the fan can be reduced on the one hand, and the temperature inside the hood can be reduced on the other hand, and the service life of the magnetic sealing strip can be extended.

[0009] Furthermore, it also includes a hinge, and the rear wind shield and the left wind shield are connected by the hinge.

[0010] Furthermore, contact surfaces of the rear air hood, the left air hood and the right air hood are provided with magnetic sealing strips.

[0011] Furthermore, there are multiple groups of enclosed spaces, doors and sealing devices, each group has a enclosed space, a door and a set of sealing devices, and the suction pipes of the multiple sets of sealing devices are connected to the purification tower after being converged.

[0012] The utility model has the following beneficial technical effects: it can prevent dust, carbon monoxide, carbon dioxide and fluorine-containing waste gas from overflowing and spreading during stirring, feeding and discharging operations; it can reduce suction resistance and fan energy consumption, and at the same time can reduce the temperature inside the seal and extend the life of the magnetic sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of multiple groups of structures of a closed system for electrolyzing rare earth metals.

[0014] Figure 2 The utility model is a schematic top view of a closed system for electrolyzing rare earth metals.

[0015] Figure 3 It is a left-side schematic diagram of a closed system for electrolyzing rare earth metals provided by the utility model.

[0016] Figure 4 is a schematic diagram of the sealing cover.

[0017] Figure markings: 1-rear air hood, 2-left air hood, 3-right air hood, 4-left ventilation hole, 5-hinge, 6-fixing device, 7-telescopic pneumatic device, 8-left handle, 9-right handle, 10-suction pipe, 11-cathode component, 12-air supply port, 13-right ventilation hole, 14-electrolytic furnace body, 15-door, 16-ventilation duct, 17-wall, 18-purification tower. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solution of the utility model in conjunction with the drawings of the specification. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance, quantity or position.

[0020] In the description of the present invention, it should be noted that, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] A closed system for electrolyzing rare earth metals, such as Figure 1-4 shown. Figure 1For display effect, the top of the enclosed space is removed to show the internal sealing device, and the actual enclosed space has a top. The closed system includes a wall 17 constituting a closed space, a door 15 and a ventilation duct 16 arranged on the wall 17, a suction duct 10, and a sealing device located in the closed space. The ventilation duct 16 is provided with an air supply port 12. The suction duct 10 is connected to a purification tower 18. The sealing device includes a rear air hood 1, a left air hood 2, a right air hood 3, a hinge 5, a fixing device 6, a telescopic pneumatic device 7 and a suction duct 10. The rear air hood 1 is connected to the telescopic pneumatic device 7 through the fixing device 6, and the telescopic pneumatic device 7 is connected to the suction duct 10. The rear air hood 1, the left air hood 2 and the right air hood 3 are placed on the upper surface of the electrolytic furnace body 14. The rear air hood 1 and the left air hood 2 are connected through the hinge 5. The contact surfaces of the rear air hood 1, the left air hood 2 and the right air hood 3 are provided with a magnetic sealing strip. The rear air hood 1, the left air hood 2 and the right air hood 3 are combined together to form a sealing cover, and a cathode component 11 hole is provided above the sealing cover. The left air hood 2 is provided with a left ventilation hole 4 and a left handle 8 , and the right air hood 3 is provided with a right ventilation hole 13 and a right handle 9 .

[0022] During the smelting process of electrolytic production of rare earth metals, the door 15 is closed, and the ventilation duct 16 transports fresh air into the room through the air supply port 12. The fresh air enters the suction duct 10 through the left ventilation hole 4 and the right ventilation hole 13. The fresh air, high-temperature electrolyte vapor and fluorine-containing waste gas enter the purification tower 18 through the suction duct 10 for recovery and treatment, reducing the contact between the high-temperature electrolyte vapor and the surface of the left wind hood 2 and the right wind hood 3 and increasing air flow, thereby reducing the surface temperature of the left wind hood 2 and the right wind hood 3.

[0023] The surface temperature of the left and right hoods 2 and 3 after opening holes in different directions was tested, and the average value was taken after multiple measurements. The results are shown in the following table.

[0024]

[0025] It can be seen from the above table that the upper surface temperature of the wind hood with holes is 29.58% lower than the upper surface temperature of the wind hood without holes; the side surface temperature of the wind hood with holes is 25.82% lower than the side surface temperature of the wind hood without holes; the side surface temperature of the wind hood with holes on the side is 15.66% lower than the side surface temperature of the wind hood without holes; the upper surface temperature of the wind hood with holes on the side is 19.91% lower than the upper surface temperature of the wind hood without holes.

[0026] The reduction in the surface temperature of the air hood can extend the service life of the magnetic sealing strips provided on the contact surfaces of the rear air hood, the left air hood and the right air hood, reduce the replacement frequency of the magnetic sealing strips, and reduce production costs.

[0027] When the operator performs the electrolysis discharging operation, the door 15 is closed, and the ventilation duct 16 delivers fresh air to the room through the air supply port 12. The left wind hood 2 is flipped over to the top of the rear wind hood 1 through the hinge 5, and the right wind hood 3 is placed in a safe position. The rear wind hood 1 moves backward through the telescopic pneumatic device 7 and is fixed in position by the fixing device 6. Fresh air passes through the electrolytic furnace and enters the suction duct 10 to bring most of the high-temperature electrolyte vapor, dust, carbon monoxide, carbon dioxide and fluorine-containing waste gas generated by electrolysis into the purification tower 18 for recovery and treatment.

[0028] The purification tower 18 can centrally recover and treat high-temperature electrolyte steam, dust, carbon monoxide, carbon dioxide and fluorine-containing waste gas generated during electrolysis in one or more electrolytic furnaces through the suction pipe 10.

[0029] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The protection scope of the present invention is defined by the claims and their equivalent technical solutions.

Claims

1. A closed system for electrolyzing rare earth metals, characterized in that: It includes a wall forming a closed space, a door and a ventilation duct arranged on the wall, and a sealing device located in the closed space. The ventilation duct is provided with an air supply port. The sealing device includes a rear air hood, a left air hood, a right air hood, a fixing device, a telescopic pneumatic device and a suction duct. The rear air hood is connected to the telescopic pneumatic device through the fixing device, and the telescopic pneumatic device is connected to the suction duct. The rear air hood, the left air hood and the right air hood are placed on the upper surface of the electrolytic furnace body. The rear air hood, the left air hood and the right air hood are combined together to form a sealing hood, and a cathode component hole is provided above the sealing hood.

2. A closed system for electrolyzing rare earth metals according to claim 1, characterized in that: Ventilation holes are arranged on the left wind shield and the right wind shield.

3. A closed system for electrolyzing rare earth metals according to claim 1, characterized in that: The utility model also comprises a hinge, and the rear wind shield and the left wind shield are connected by the hinge.

4. A closed system for electrolyzing rare earth metals according to claim 1, characterized in that: The contact surfaces of the rear wind shield, the left wind shield and the right wind shield are provided with magnetic sealing strips.

5. A closed system for electrolyzing rare earth metals according to claim 1, characterized in that: There are multiple groups of enclosed spaces, doors and sealing devices, each group has a enclosed space, a door and a set of sealing devices, and the suction pipes of the multiple sets of sealing devices are connected to the purification tower after being converged.

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