Mobile feeding device for fluorinated salts in the upper part of an electrolytic cell

Abstract

The application discloses a mobile fluorinated salt feeding device for the upper part of an electrolytic cell, which comprises a conical material box, a spring operating rod, a filter screen layer, a mounting frame, a cloth bag cover and a discharging cylinder. The mounting frame is arranged in the upper part of the conical material box. The filter screen layer is arranged on the mounting frame. The discharging cylinder is arranged on the discharging port of the bottom of the conical material box. The cloth bag cover is arranged on the discharging cylinder. The spring operating rod is arranged in the center of the filter screen layer and the mounting frame. The conical material box, the spring operating rod, the cloth bag cover and the discharging cylinder are coaxially arranged. One end of the spring operating rod extends out of the top of the conical material box and is provided with a spring compression lifting frame. The bottom end of the spring operating rod extends out of the discharging port and is coaxially connected with a circular valve plate. The device can be movably arranged above a moving platform. The smooth inner wall of the conical box can improve the discharging speed, prevent fluorinated salt from being absorbed by moisture and adhered to the inner wall of the bottom of the cone to form arches and bridges, and ensure smooth discharging. Meanwhile, the conical box can increase the single-word feeding amount, reduce the labor intensity and improve the feeding efficiency.

Description

Technical Field

[0001] This application relates to the field of clean production technology for electrolytic aluminum, and in particular to a mobile feeding device for fluoride salts at the top of an electrolytic cell. Background Technology

[0002] In the normal aluminum electrolysis production process, the stability and conductivity of the electrolyte composition directly determine the electrolysis efficiency and product quality. To maintain the balance of the acidic electrolyte system and improve its conductivity, fluoride salts need to be added quantitatively to the aluminum electrolysis cell. Among them, aluminum fluoride is the core additive, and its consumption is usually stable at 20~40 kg / ton of electrolyzed Al to ensure that the free aluminum fluoride content in the electrolyte is stable within the range of 5~13%. Therefore, in the aluminum electrolysis production process, fluoride salts (such as cryolite, aluminum fluoride, etc.) need to be added to the electrolysis cell periodically to replenish the consumed fluoride salts, adjust the molecular ratio, and maintain stable production.

[0003] With the advancement of intelligent transformation in the aluminum electrolysis industry, fluoride salt silos are installed above the electrolytic cells. When fluoride salt needs to be added, the silo outlet is opened periodically to complete the discharge. The linkage between the silo and the electrolytic cell control system improves the timeliness and accuracy of fluoride salt addition, providing hardware support for stable electrolyte composition. However, currently, the material transfer process from the ground-level fluoride salt storage area to the silo above the electrolytic cell still relies on manual handling. This not only requires workers to undertake high-intensity physical labor, but also poses significant operational safety hazards due to the dense equipment and limited space in the electrolysis workshop, which increases the risk of collisions, falls, and other accidents during manual handling.

[0004] Furthermore, due to the limited experience of operators, manually adding fluoride salts directly to the silo can lead to the introduction of various impurities, compromising the accuracy of the feeding process. Since fluoride salt packaging often uses an inner liner bag structure, the liner bag is easily damaged by friction and tearing during manual unpacking and emptying. This allows residual impurities (such as packaging debris, dust clumps), and large, insufficiently ground fluoride salt particles to directly enter the silo. These foreign objects can clog the silo's feeding channel, interfering with the metering accuracy of subsequent metering components. This results in a discrepancy between the actual amount of fluoride salt added and the theoretical requirement. Severe deviations can also disrupt the electrolyte balance, affecting the quality stability of the products produced through aluminum electrolysis.

[0005] The information disclosed in the background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] This application provides a mobile feeding device for fluoride salts at the top of an electrolytic cell to address the above-mentioned technical problems. This device is convenient for feeding, can filter raw materials while feeding, and is also convenient for unloading and easy to operate.

[0007] This application provides a mobile feeding device for fluoride salts at the top of an electrolytic cell, including: a conical hopper, a spring control lever, a filter layer, a mounting frame, a bag cover, and a feeding cylinder;

[0008] An installation frame is housed in the upper part of the conical hopper; the filter screen layer is installed on the installation frame; a discharge cylinder is installed above the discharge port at the bottom of the conical hopper; and a bag cover is installed on the discharge cylinder.

[0009] The spring control lever passes through the center of the filter layer and the mounting frame; the conical material box, the spring control lever bag cover, and the discharge cylinder are coaxially arranged.

[0010] One end of the spring control lever extends out of the top of the conical hopper and is equipped with a spring compression lifting frame; the bottom end of the spring control lever extends out of the discharge port and is coaxially connected to the circular valve plate.

[0011] Preferably, the spring compression lifting frame includes: an upper sliding plate, a fixing plate, a lifting ring, a spring, and a limiting nut;

[0012] Both ends of the lifting ring are slidably connected to the upper sliding plate and fixedly connected to the fixing plate;

[0013] The upper slide plate, the fixed plate, the spring, and the limit nut are fitted onto the spring operating lever; the limit nut and the fixed plate are fixedly connected to the spring operating lever;

[0014] The upper sliding plate is slidably connected to the spring control lever;

[0015] The spring and the limiting nut are housed between the upper sliding plate and the fixed plate;

[0016] One end of the spring is connected to the limit nut, and the other end is connected to the fixing plate.

[0017] Preferably, the spring compression lifting frame includes: a sliding section; sliding sections are respectively provided on the two symmetrical ends of the lifting ring; the sliding sections are slidably disposed within the two ends of the upper slide plate and are fixedly connected to the fixed plate.

[0018] Preferably, the spring control lever is an operating lever; the top of the operating lever extends out of the center axis of the upper slide plate and has an opening.

[0019] Preferably, it includes: a connecting nut; the extended end of the sliding section is threadedly connected to the screw holes at both ends of the fixed plate and extends out of the fixed plate; the connecting nut is provided on the extended section of the sliding section.

[0020] Preferably, the sealing ring includes: a ring body and a silicone sleeve; the outer wall of the ring body is connected to the inner wall of the feed cylinder; the silicone sleeve is fitted on the inner wall of the ring body; during transfer, the circular valve plate abuts against the silicone sleeve.

[0021] Preferably, it includes: a plurality of lifting rings; the lifting rings are disposed at each of the top corners of the conical hopper.

[0022] Preferably, it includes: a baffle plate; the baffle plate is disposed on the top periphery of the conical hopper.

[0023] Preferably, the mounting bracket includes: multiple mounting horizontal plates, mounting vertical plates, and mounting holes;

[0024] The mounting horizontal plates are respectively installed on the opposite side walls of the conical hopper; another mounting horizontal plate is installed in the middle of the conical hopper, with both ends connected to the opposite side walls of the conical hopper; the mounting vertical plates are respectively connected to each mounting horizontal plate and are installed in the middle of the conical hopper;

[0025] The mounting holes are located at the intersection of the mounting longitudinal plate and the middle mounting transverse plate, and are coaxial with the conical hopper.

[0026] Preferably, the filter layer includes: a steel filter screen and multiple connecting plates; the connecting plates are disposed on the bottom surface of the steel filter screen and are respectively aligned and connected to each mounting horizontal plate; mounting holes are opened on the connecting plates opposite the mounting holes of the mounting frame.

[0027] The beneficial effects that this application can produce include:

[0028] 1) The electrolytic cell upper fluoride salt mobile feeding device provided in this application can be movably set above the mobile platform. The device adopts a conical box with a smooth inner wall, which can improve the feeding speed, prevent the fluoride salt from absorbing moisture and adhering to the inner wall of the cone bottom to form arches and bridges, and ensure smooth feeding. At the same time, the conical box can increase the amount of material fed at one time, reduce labor intensity, and improve feeding efficiency.

[0029] 2) The electrolytic cell upper fluoride mobile feeding device provided in this application is equipped with a disassembly hook on the top feed port of the device, which is convenient to be hoisted on the gantry crane. The gantry crane can precisely control the movement of the box and accurately lower it to the feeding port at the top of the electrolytic furnace to achieve precise feeding.

[0030] 3) The electrolytic cell upper fluoride mobile feeding device provided in this application has a filter screen installed at the upper part of the feed inlet, which can filter out various impurities formed during feeding and improve the purity of the fed fluoride.

[0031] 4) The mobile feeding device for fluoride salts at the top of the electrolytic cell provided in this application has a spring operating rod installed along the central axis of the conical material box. The spring operating rod is driven to the circular valve plate at the bottom of the box. During transfer, while the conical material box is transferred by the gantry crane, one end of the spring operating rod is lifted to drive the circular valve plate to close the conical material box, so that there is no material outsourcing during the transfer process. After the conical material box is transferred to the top of the target electrolytic cell, the spring operating rod pushes down the circular valve plate under the push of the spring, opening the discharge port at the bottom of the conical material box for discharge, so as to achieve reliable transfer and discharge.

[0032] 5) The mobile feeding device for fluoride salts at the top of the electrolytic cell provided in this application has a feeding guide barrel at the outlet of the device. The diameter of the guide barrel is smaller than the diameter of the feed port at the top of the electrolytic cell. When feeding, the feeding port of the conical material box is inserted into the feed port at the top of the electrolytic cell to feed the material, thus preventing dust from escaping.

[0033] 6) The mobile feeding device for fluoride salts at the top of the electrolytic cell provided in this application has a cloth bag installed at the outlet of the device. When feeding, the cloth bag extends into the feed inlet of the electrolytic cell to form a sealed channel. The entire process from the feed inlet to the silo is sealed, realizing dust-free operation, improving the working environment, and protecting the health of employees. Attached Figure Description

[0034] Figure 1 A schematic diagram of a movable fluoride feeding device at the top of the electrolytic cell in at least one embodiment provided in this application;

[0035] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle;

[0036] Figure 3 A top view of the conical hopper structure in at least one embodiment provided in this application;

[0037] Figure 4 A schematic diagram of the bottom structure of the filter screen in at least one embodiment provided in this application;

[0038] Legend:

[0039] Conical material box 1, lifting ring 21, baffle plate 22, filter screen layer 235, mounting bracket 14, support rod 31, round valve plate 123, discharge cylinder 23, sealing ring 234, bag cover 232, mounting horizontal plate 141, mounting vertical plate 142, mounting hole 143, connecting plate 231, steel filter screen 233, operating rod 12, upper sliding plate 131, spring 111, lifting ring 11, sliding section 122, limit nut 15, fixing plate 132, connecting nut 121. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0042] Technical means not detailed in this application and not used to solve the technical problems of this application are all set according to common general knowledge in the field, and multiple common general knowledge setting methods can be implemented.

[0043] See Figures 1-4 The mobile feeding device for fluoride salts at the top of the electrolytic cell provided in this application includes: a conical material box 1, a spring operating lever, a filter layer 235, a mounting frame 14, a bag cover 232, and a feeding cylinder 23; a discharge port is provided on the bottom surface of the conical material box 1, and a feeding cylinder 23 is provided on the discharge port; one end of the bag cover 232 is connected to the bottom surface of the feeding cylinder 23, and the other end extends vertically downward. During feeding, the bag cover 232 covers the feed port on the electrolytic cell to prevent dust generated during feeding from overflowing; during feeding, the feeding cylinder 23 is inserted into the feed port on the electrolytic cell. The diameter of the feeding cylinder 23 is smaller than that of the feed port on the electrolytic cell; the bottom diameter of the bag cover 232 is larger than that of the feed port on the electrolytic cell, realizing accurate dust-free feeding.

[0044] The top surface of the conical material box 1 is open to facilitate material feeding. A mounting frame 14 is installed inside the open end of the top surface of the conical material box 1, and a filter screen layer 235 is installed on the mounting frame 14; the operating end of the spring operating lever extends out of the top surface of the conical material box 1, and the other end extends out of the discharge port on the bottom surface of the conical material box 1;

[0045] The spring control lever includes: an operating lever 12, a spring compression lifting frame, and a circular valve plate 123; one end of the operating lever 12 extends out of the lower discharge port of the conical material box 1 and is connected to the central area of ​​the circular valve plate 123, and the other end extends out of the feed port of the conical material box 1, with a spring compression lifting frame installed on the extended end;

[0046] The spring-compression lifting frame includes: a sliding plate 131, a spring 111, a lifting ring 11, a sliding section 122, a limiting nut 15, a fixing plate 132, and a connecting nut 121. The top protruding end of the operating rod 12 passes through the central axis of the sliding plate 131 and the fixing plate 132. The sliding plate 131 and the fixing plate 132 are spaced apart, and the spring 111 is pressed between the sliding plate 131 and the fixing plate 132. One end of the spring 111 abuts against the top surface of the fixing plate 132, and the other end abuts against the bottom surface of the limiting nut 15 located below the sliding plate 131. The limiting nut 15 is sleeved on the operating rod 12. The top end of the operating rod 12 extends out of a through hole opened in the middle of the sliding plate 131.

[0047] Lifting rings 11 are provided through both sides of the sliding plate 131 and the fixing plate 132; sliding sections 122 are provided on the two opposite sides of the lifting rings 11; the sliding sections 122 are respectively through the mounting holes on both sides of the sliding plate 131 and the fixing plate 132, the sliding sections 122 are fixedly connected to the fixing plate 132, and the sliding sections 122 are slidably connected to the sliding plate 131.

[0048] In one specific embodiment, it includes: a plurality of support rods 31; the support rods 31 are respectively disposed at each vertex of the bottom surface of the conical material box 1. They are used to protect the feed cylinder 23 during material feeding, preventing the feed cylinder 23 from directly contacting the ground.

[0049] In one specific embodiment, it includes: multiple baffles 22; the baffles 22 are arranged along the top periphery of the conical material box 1 to prevent material from overflowing during feeding and to increase the filtration feeding space above the filter screen layer 235.

[0050] In one specific embodiment, the mounting frame 14 includes: a mounting horizontal plate 141 and a mounting vertical plate 142; the mounting horizontal plates 141 are symmetrically arranged in pairs on the opposite inner walls of the conical hopper 1, and extend vertically outward to form a support platform. A third mounting horizontal plate 141 is located in the central region of the conical hopper 1, and its two ends are respectively connected to the side walls of the conical hopper 1. The two ends of the mounting vertical plate 142 are respectively connected to the central regions of the mounting horizontal plates 141 located on the opposite inner walls of the conical hopper 1, and are connected to the third mounting horizontal plate 141 located in the central region of the conical hopper 1. A mounting hole 143 is provided at the intersection of the third mounting horizontal plate 141 and the mounting vertical plate 142 so that a spring operating lever can be inserted therethrough.

[0051] In one specific embodiment, the filter layer 235 includes: a connecting plate 231 and a steel filter screen 233; the connecting plate 231 is respectively provided on two opposite sides and the central area of ​​the bottom surface of the steel filter screen 233; the connecting plate 231 is respectively connected to the mounting frame 14 to realize the installation of the filter screen. This installation can improve the overall load-bearing capacity of the device, and is especially suitable for filtering fluoride salts with large self-weight, filtering out impurities, which is conducive to accurately controlling the content of various elements in electrolytic aluminum products and improving product quality.

[0052] In one specific embodiment, it includes: multiple lifting rings 21; lifting rings 21 are respectively provided on each apex corner of the conical material box 1. This facilitates the disassembly and connection of the gantry crane to realize the hoisting of the conical material box 1.

[0053] In one specific embodiment, the two ends of the sliding segment 122 extend out of the fixing plate 132 and are detachably connected to the fixing plate 132 via connecting nuts 121. The two protruding ends of the sliding segment 122 may be provided with threaded structures to achieve detachable connection with the fixing plate 132.

[0054] In one specific embodiment, it includes: a sealing ring 234; the sealing ring 234 is accommodated and connected to the inner wall of the feeding cylinder 23, and is disposed outside the bottom surface of the discharge port of the conical material box 1.

[0055] In one specific embodiment, the sealing ring 234 includes a ring body and a silicone sleeve; the outer wall of the ring body is connected to the inner wall of the feed cylinder 23, and the silicone sleeve is fitted onto the inner wall of the ring body. By setting the silicone sleeve, the sealing degree during transfer is improved, the transfer safety is enhanced, and the occurrence of material leakage during transfer is reduced.

[0056] When adding material to the conical hopper 1 on the operating platform, a gantry crane lifts the lifting ring 11. At this time, after the operating rod 12, which passes through the filter layer 235 and the mounting frame 14, is lifted, the circular valve plate 123 abuts against the sealing ring 234 set in the discharge port, thus sealing the conical hopper 1. After manually adding fluoride salt into the conical hopper 1, the lifting rings 21 are connected to the gantry crane hooks via iron chains. The gantry crane then lifts the conical hopper 1 and transports it to the area above the electrolytic cell inlet. The operator controls the conical hopper 1 to align with the inlet and lowers it until the support rod 31 contacts the top of the electrolytic cell, completing the placement of the conical hopper 1. At this time, the bag cover 232 below the discharge cylinder 23 is placed over the inlet, and the discharge cylinder 23 is inserted into the inlet. Discharging material in this state can avoid dust generation and effectively protect the environment of the discharge area.

[0057] Since the discharge port of the conical hopper 1 and the operating rod 12 are coaxial, the position of the discharge port can be determined by observing the position of the central axis of the operating rod 12 during operation, thereby achieving accurate control of the material discharge.

[0058] After the conical material box 1 is placed on the electrolytic cell, the gantry crane releases the lifting ring 11. The restoring force of the spring 111 pushes the fixed plate 132 and the lower operating rod 12 fixedly connected to it downwards, causing the circular valve plate 123 to move downwards and away from the sealing ring 234. At this time, a space is formed between the sealing ring 234 and the circular valve plate 123. The denser powdered fluoride salt flows out of the space and into the electrolytic cell under the action of gravity. Automatic feeding is completed. After feeding is completed, the gantry crane lifts the lifting ring 21 to lift the conical material box 1 away from the electrolytic cell, completing the feeding operation.

[0059] During the discharge process, the part of the operating lever 12 that extends out of the upper slide plate 131 moves relative to the upper slide plate 131. The movement stroke is the height of the discharge space, which can be adjusted by setting the length of the operating lever 12 extending out of the upper slide plate 131 using the spring model 111.

[0060] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mobile feeding device for fluoride salts at the top of an electrolytic cell, characterized in that, include: Conical hopper (1), spring control lever, filter screen layer (235), mounting bracket (14), bag cover (232), discharge cylinder (23); The upper part of the conical material box (1) accommodates the mounting frame (14); the filter layer (235) is installed on the mounting frame (14); the bottom outlet of the conical material box (1) is provided with a discharge cylinder (23); the bag cover (232) is provided on the discharge cylinder (23); The spring control lever passes through the center of the filter layer (235) and the mounting bracket (14); the conical material box (1), the spring control lever bag cover (232), and the discharge cylinder (23) are coaxially arranged; One end of the spring control lever extends out of the top of the conical hopper (1) and is equipped with a spring compression lifting frame; the bottom end of the spring control lever extends out of the discharge port and is coaxially connected to the circular valve plate (123).

2. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 1, characterized in that, The spring compression lifting frame includes: an upper sliding plate (131), a fixing plate (132), a lifting ring (11), a spring (111), and a limiting nut (15); The two ends of the lifting ring (11) are slidably connected to the upper slide plate (131) and fixedly connected to the fixing plate (132); The upper slide plate (131), the fixing plate (132), the spring (111), and the limit nut (15) are sleeved on the spring operating rod; the limit nut (15) and the fixing plate (132) are fixedly connected to the spring operating rod; The upper slide plate (131) is slidably connected to the spring control lever; The spring (111) and the limiting nut (15) are housed between the upper slide plate (131) and the fixing plate (132); One end of the spring (111) is connected to the limiting nut (15), and the other end is connected to the fixing plate (132).

3. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 2, characterized in that, The spring compression lifting frame includes: a sliding section (122); the sliding section (122) is respectively provided on the two symmetrical ends of the lifting ring (11); the sliding section (122) is slidably disposed in the two ends of the upper slide plate (131) and is fixedly connected to the fixing plate (132).

4. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 2, characterized in that, The spring control lever is an operating lever (12); the top of the operating lever (12) extends out of the center axis of the upper slide plate (131) and has an opening.

5. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 3, characterized in that, include: Connecting nut (121); the extended end of the sliding section (122) is threadedly connected to the screw holes at both ends of the fixed plate (132) and extends out of the fixed plate (132); connecting nut (121) is provided on the extended section of the sliding section (122).

6. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 1, characterized in that, The sealing ring (234) includes: a ring body and a silicone sleeve; the outer wall of the ring body is connected to the inner wall of the feed cylinder (23); the silicone sleeve is fitted on the inner wall of the ring body; during transfer, the round valve plate (123) abuts against the silicone sleeve.

7. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 1, characterized in that, include: Multiple lifting rings (21); the lifting rings (21) are located at the top corners of the conical hopper (1).

8. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 1, characterized in that, include: Baffle plate (22); Baffle plate (22) is set on the top periphery of the conical hopper (1).

9. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 1, characterized in that, The mounting bracket (14) includes: multiple mounting horizontal plates (141), mounting vertical plates (142), and mounting holes (143); The mounting horizontal plates (141) are respectively set on the opposite side walls of the conical hopper (1); another mounting horizontal plate (141) is set in the middle of the conical hopper (1), and its two ends are respectively connected to the opposite side walls of the conical hopper (1); the mounting vertical plate (142) is respectively connected to each mounting horizontal plate (141) and is set in the middle of the conical hopper (1); The mounting hole (143) is opened at the intersection of the mounting longitudinal plate (142) and the middle mounting transverse plate (141), and is coaxial with the conical hopper (1).

10. The mobile feeding device for fluoride salts at the top of the electrolytic cell according to claim 9, characterized in that, The filter layer (235) includes: a steel filter (233) and multiple connecting plates (231); the connecting plates (231) are disposed on the bottom surface of the steel filter (233) and are respectively aligned and connected to each mounting horizontal plate (141); Mounting holes (143) are provided on the connecting plate (231) opposite to the mounting holes (143) of the mounting bracket (14).

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