Recovery device for indium in indium-containing waste

Abstract

The device comprises a recycling box, a reaction channel is formed in the recycling box, the reaction channel is arranged in a continuously bent S shape, the top end of the reaction channel penetrates through the side wall of the top of the recycling box, and a discharging cavity is formed in the side wall of the bottom of the recycling box; the bottom end of the reaction channel is communicated with a discharging cavity, a filtering and discharging device is arranged at the bottom end of the discharging cavity, a supporting device is arranged on the bottom side of the recycling box, a plurality of horizontal channel cavities which are sequentially, vertically and equidistantly arranged are formed in the reaction channel, and a screw rod is rotationally connected in each horizontal channel cavity; and one end of each screw rod extends out of the side wall of the recycling box and is fixedly connected with a gear. The reaction time and the reaction efficiency in the indium-containing waste gas, oxygen and sulfuric acid reaction channel are greatly increased, the indium leaching rate and the indium leaching efficiency are greatly improved, indium extraction and recovery of the indium-containing waste gas are more sufficient and thorough, and the resource recovery and utilization rate is high.

Description

Technical Field

[0001] The invention relates to the technical field of indium recovery, and in particular to a device for recovering indium from indium-containing waste gas. Background Art

[0002] Indium is a chemical element with atomic number 49. It is a soft, silvery-white metal with a slightly bluish hue. It is flammable, irritating, a heavy metal, and toxic.

[0003] Indium is mainly associated with lead, zinc, antimony, copper and other minerals. In the process of smelting and extracting the main metals, indium-containing waste gas will be produced. The discharged waste gas contains trace amounts of indium elements. The toxicity of indium is greater than that of lead and should not be underestimated. It is harmful to the environment and can cause pollution to water bodies. Therefore, it is necessary to recover indium from indium-containing waste gas. However, under the conditions of strong acid oxidation leaching, the indium-containing waste gas has a low leaching rate of indium due to the short leaching time of indium-containing waste gas in sulfuric acid. The low leaching rate greatly wastes precious scattered metal indium. Summary of the invention

[0004] The present invention provides an indium recovery device in indium-containing waste gas to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A device for recovering indium from indium-containing waste gas, comprising a recovery box, a reaction channel is provided in the recovery box, the reaction channel is arranged in a continuously curved S-shape, the top of the reaction channel passes through the top side wall of the recovery box, a discharge cavity is provided in the bottom side wall of the recovery box, the bottom end of the reaction channel is connected to the discharge cavity, a filtering and discharging device is arranged at the bottom end of the discharge cavity, a supporting device is arranged at the bottom side of the recovery box, the reaction channel contains a plurality of horizontal channel cavities which are vertically equidistant in sequence, and each of the horizontal channel cavities is rotatably connected to the discharge cavity. There is a spiral rod, one end of each of the spiral rods extends out of the side wall of the recovery box and is fixedly connected with a gear, and multiple gears are vertically meshed and connected in sequence. The side wall of the top gear is connected with an oxygen suction hose and a smoking hose through a suction pump device, and one end of the oxygen suction hose and the smoking hose are connected with a blowing pipe, the other end of the oxygen suction hose is connected to the oxygen supply equipment, and the other end of the smoking hose is connected to the exhaust port of indium-containing waste gas. The blowing pipe is L-shaped, and one end of the blowing pipe passes through the side wall of the recovery box and extends into the discharge cavity.

[0006] Preferably, the filtering and discharging device includes a threaded ring, which is fixedly connected to the bottom side wall of the recovery box, the inner side wall of the threaded ring is provided with an internal thread, the discharge chamber is located above the center of the threaded ring, the inner thread of the threaded ring is connected to a threaded barrel, the threaded barrel is connected to the discharge chamber, a filter screen is provided in the threaded barrel, and a sealing cover is connected to the bottom thread of the threaded barrel.

[0007] Preferably, the supporting device comprises two supporting columns, and the two supporting columns are both fixedly connected to the bottom side walls of the recycling box, and the bottom side walls of the two supporting columns are both fixedly connected with a bottom plate.

[0008] Preferably, the suction pump device includes a fixing rod, which is fixedly connected to the outer wall of the recovery box, one end of the fixing rod is fixedly connected to a disc shell, and a circular plate is rotatably connected in the disc shell, an annular cavity is formed between the outer ring side wall of the circular plate and the inner ring side wall of the disc shell, and the middle sections of the oxygen inhalation hose and the smoking hose are both located in the annular cavity, and both ends of the oxygen inhalation hose and the smoking hose pass through the side walls of the disc shell respectively, two extrusion blocks are fixedly connected to the outer ring side walls of the circular plate, a protective shell is fixedly connected to the outer wall of the disc shell, a motor is fixedly connected in the protective shell, and the output shaft of the motor is fixedly connected to a rotating rod, the rotating rod passes through the disc shell and is rotatably connected to the two side walls of the disc shell, one end of the rotating rod is fixedly connected to the central side wall of the uppermost gear, and the rotating rod passes through and is fixedly connected to the side wall of the circular plate.

[0009] Preferably, the oxygen inhalation hose and the smoking hose are symmetrically arranged in a section located in the annular cavity.

[0010] Preferably, when the circular plate rotates, the two extrusion blocks on the side wall of the circular plate rotate to alternately cyclically squeeze the oxygen inhalation hose and the smoking hose, so that the oxygen inhalation hose and the smoking hose generate suction to suck oxygen and indium-containing waste gas into the blowing pipe.

[0011] Preferably, the oxygen supply equipment is an oxygen tank.

[0012] Preferably, the direction of the spiral on each of the spiral rods is opposite to the direction of the spiral on the adjacent spiral rod.

[0013] Preferably, the reaction channel is filled with sulfuric acid.

[0014] Preferably, the spiral rod is made of a material resistant to sulfuric acid corrosion.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The invention greatly increases the reaction time and reaction efficiency in the reaction channel of indium-containing waste gas, oxygen and sulfuric acid, thereby greatly improving the indium leaching rate and leaching efficiency, making the indium extraction and recovery of indium-containing waste gas more complete and thorough, and achieving a high resource recovery rate.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 This is a schematic structural diagram of a device for recovering indium from indium-containing waste gas proposed by the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of an indium recovery device from indium-containing waste gas proposed by the present invention; Figure 3 A schematic diagram of the side cross-sectional structure of an indium recovery device in indium-containing waste gas proposed by the present invention; Figure 4 This is a schematic diagram of the internal cross-sectional structure of the disc shell proposed by the present invention; Figure 5 It is a structural schematic diagram of the threaded barrel proposed by the present invention; Figure 6 for Figure 2 Schematic diagram of the locally enlarged structure of A in the middle.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Protective shell; 2. Disc shell; 3. Oxygen suction hose; 4. Smoking hose; 5. Screw rod; 6. Gear; 7. Blowing pipe; 8. Filter; 9. Threaded barrel; 10. Sealing cover; 11. Recovery box; 12. Reaction channel; 13. Discharge chamber; 14. Threaded ring; 15. Support column; 16. Bottom plate; 17. Fixed rod; 18. Motor; 19. Rotating rod; 20. Round plate; 21. Extrusion block. DETAILED DESCRIPTION

[0019] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0020] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] See also Figures 1 to 6 In an embodiment of the present invention, an indium recovery device in indium-containing waste gas comprises a recovery box 11, a reaction channel 12 is provided in the recovery box 11, the reaction channel 12 is arranged in a continuously curved S shape, the top of the reaction channel 12 passes through the top side wall of the recovery box 11, a discharge cavity 13 is provided in the bottom side wall of the recovery box 11, the bottom end of the reaction channel 12 is connected to the discharge cavity 13, a filtering and discharging device is arranged at the bottom end of the discharge cavity 13, a supporting device is provided at the bottom side of the recovery box 11, the supporting device comprises two supporting columns 15, the two supporting columns 15 are fixedly connected to the bottom side wall of the recovery box 11, the bottom side walls of the two supporting columns 15 are fixedly connected to the bottom plates 16, the reaction channel 12 contains a plurality of horizontal channel cavities which are vertically equidistant in sequence, and each horizontal channel cavity A spiral rod 5 is connected to the inner rotation, and the spiral direction on each spiral rod 5 is opposite to the spiral direction on the adjacent spiral rod 5. One end of each spiral rod 5 extends out of the side wall of the recovery box 11 and is fixedly connected to a gear 6. Multiple gears 6 are vertically meshed and connected in sequence. The side wall of the top gear 6 is connected to an oxygen hose 3 and a smoking hose 4 through a suction pump device. One end of the oxygen hose 3 and the smoking hose 4 are connected to a blowing pipe 7. The other end of the oxygen hose 3 is connected to an oxygen supply device, which is an oxygen tank. The other end of the smoking hose 4 is connected to an exhaust port for indium-containing waste gas. The blowing pipe 7 is L-shaped, and one end of the blowing pipe 7 passes through the side wall of the recovery box 11 and extends into the discharge chamber 13. The reaction channel 12 is filled with sulfuric acid, and the spiral rod 5 is made of a material resistant to sulfuric acid corrosion.

[0023] See also Figure 2 and Figure 5 The filtering and discharging device includes a threaded ring 14, which is fixedly connected to the bottom side wall of the recovery box 11. The inner side wall of the threaded ring 14 is provided with an internal thread. The discharge chamber 13 is located above the center of the threaded ring 14. The threaded ring 14 is internally threaded with a threaded barrel 9, which is connected to the discharge chamber 13. A filter screen 8 is provided in the threaded barrel 9. A sealing cover 10 is threadedly connected to the bottom of the threaded barrel 9. After the oxygen, sulfuric acid and indium-containing waste gas react in the reaction channel 12, leaching residue and indium-containing leachate can be obtained. When the leaching residue and indium-containing leachate are in the discharge chamber 13, the sealing cover 10 can be unscrewed first, and the leaching residue in the reaction channel 12 is intercepted by the filter screen 8 in the threaded barrel 9, so that the indium-containing leachate is discharged. Then, the threaded barrel 9 is unscrewed to discharge the leaching residue on the filter screen 8 in the threaded barrel 9.

[0024] See also Figure 2 and Figure 6 The suction pump device includes a fixing rod 17, which is fixedly connected to the outer wall of the recovery box 11, one end of the fixing rod 17 is fixedly connected to a disc shell 2, a circular plate 20 is rotatably connected inside the disc shell 2, an annular cavity is formed between the outer ring side wall of the circular plate 20 and the inner ring side wall of the disc shell 2, the middle section of the oxygen inhalation hose 3 and the smoking hose 4 are both located in the annular cavity, the oxygen inhalation hose 3 and the smoking hose 4 are symmetrically arranged in the annular cavity, the two ends of the oxygen inhalation hose 3 and the smoking hose 4 respectively pass through the side wall of the disc shell 2, two extrusion blocks 21 are fixedly connected to the outer ring side wall of the circular plate 20, a protective shell 1 is fixedly connected to the outer wall of the disc shell 2, and a motor 1 is fixedly connected inside the protective shell 1 8. The output shaft of the motor 18 is fixedly connected with a rotating rod 19, which penetrates the disc shell 2 and is rotatably connected to the two side walls of the disc shell 2. One end of the rotating rod 19 is fixedly connected to the central side wall of the uppermost gear 6. The rotating rod 19 penetrates and is fixedly connected to the side wall of the circular plate 20. When the motor 18 is started, the motor 18 can drive the rotating rod 19 to rotate. The rotation of the rotating rod 19 can drive the circular plate 20 to rotate. The two extrusion blocks 21 on the side wall of the circular plate 20 can rotate to alternately circulate and squeeze the oxygen inhalation hose 3 and the smoking hose 4, so that the oxygen inhalation hose 3 and the smoking hose 4 generate suction, and the oxygen and the indium-containing waste gas are sucked into the blowing pipe 7, and then the oxygen and the indium-containing waste gas enter the discharge chamber 13.

[0025] The working principle of the present invention is: When in use, firstly, one end of the smoking hose 4 can be connected to the exhaust port of the indium-containing waste gas, and then one end of the oxygen-absorbing hose 3 can be connected to the oxygen tank, and then sulfuric acid can be filled into the reaction channel 12, and then the motor 18 can be started, and the motor 18 can drive the rotating rod 19 to rotate, and the rotation of the rotating rod 19 can drive the circular plate 20 to rotate, and the two extrusion blocks 21 on the side wall of the circular plate 20 can rotate to alternately cyclically squeeze the oxygen-absorbing hose 3 and the smoking hose 4, so that the oxygen-absorbing hose 3 and the smoking hose 4 generate suction, and the oxygen and the indium-containing waste gas are sucked into the blowing pipe 7, and then the oxygen and the indium-containing waste gas enter the discharge cavity. 13, and then the oxygen and the indium-containing waste gas flow upward along the reaction channel 12 and react with the sulfuric acid in the reaction channel 12. When the oxygen and the indium-containing waste gas flow through the spiral rod 5 in the reaction channel 12, the spiral rod 5 can make the horizontal channel cavity in the reaction channel 12 form a spiral cavity. When the waste gas flows along the spiral cavity of the spiral rod 5, the flow time of the waste gas in the reaction channel 12 can be increased, thereby greatly increasing the reaction time of the waste gas and the sulfuric acid. By making the oxygen, sulfuric acid and the indium-containing waste gas contact more fully and thoroughly in the reaction channel 12, leaching residue and indium-containing leachate can be obtained after the reaction is completed; While the rotating rod 19 rotates, it can also drive multiple meshing gears 6 to rotate simultaneously. The rotation of multiple gears 6 can drive multiple spiral rods 5 to rotate. The rotation of multiple spiral rods 5 can not only stir the indium-containing waste gas into fine bubbles, increase the contact area with sulfuric acid, and increase the reaction efficiency, but also the rotation of the spiral rods 5 can gradually push the leaching residue of the reaction of the indium-containing waste gas and sulfuric acid into the discharge chamber 13 along the reaction channel 12. After the reaction is completed, the blocking cover 10 can be unscrewed first, and the leaching residue in the reaction channel 12 is intercepted by the filter screen 8 in the threaded barrel 9, so that the indium-containing leachate is discharged. Finally, the pH value of the indium-containing leachate is adjusted to 2-2.5, and P204 is used to extract indium in the indium-containing leachate to separate indium and extracted liquid, and the extracted indium can be recovered.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A device for recovering indium from indium-containing waste gas, comprising a recovery box (11), characterized in that: A reaction channel (12) is provided in the recovery box (11), and the reaction channel (12) is arranged in a continuously curved S shape. The top of the reaction channel (12) passes through the top side wall of the recovery box (11), and a discharge cavity (13) is provided in the bottom side wall of the recovery box (11). The bottom end of the reaction channel (12) is connected to the discharge cavity (13), and a filtering and discharging device is provided at the bottom end of the discharge cavity (13). A supporting device is provided on the bottom side of the recovery box (11). The reaction channel (12) contains a plurality of horizontal channel cavities arranged vertically and equidistantly in sequence, and a spiral rod (5) is rotatably connected to each of the horizontal channel cavities, and each of the spiral rods (5) is rotatably connected to each other. One end of the rotary rod (5) extends out of the side wall of the recovery box (11) and is fixedly connected to a gear (6). The plurality of gears (6) are vertically meshed and connected in sequence. The side wall of the top gear (6) is connected to an oxygen inhalation hose (3) and a smoking hose (4) through a suction pump device. One end of each of the oxygen inhalation hose (3) and the smoking hose (4) is connected to a blowing pipe (7). The other end of the oxygen inhalation hose (3) is connected to an oxygen supply device. The other end of the smoking hose (4) is connected to an exhaust port for indium-containing waste gas. The blowing pipe (7) is arranged in an L shape. One end of the blowing pipe (7) passes through the side wall of the recovery box (11) and extends into the discharge chamber (13).

2. The indium recovery device in indium-containing waste gas according to claim 1, characterized in that: The filtering and discharging device comprises a threaded ring (14), the threaded ring (14) being fixedly connected to the bottom side wall of the recovery box (11), the inner side wall of the threaded ring (14) being provided with an internal thread, the discharge cavity (13) being located above the center of the threaded ring (14), the threaded ring (14) being internally threadedly connected to a threaded barrel (9), the threaded barrel (9) being connected to the discharge cavity (13), a filter screen (8) being provided inside the threaded barrel (9), and a sealing cap (10) being threadedly connected to the bottom of the threaded barrel (9).

3. The indium recovery device in indium-containing waste gas according to claim 2, characterized in that: The support device comprises two support columns (15), the two support columns (15) are fixedly connected to the bottom side wall of the recovery box (11), and the bottom side walls of the two support columns (15) are fixedly connected to a bottom plate (16).

4. The device for recovering indium from indium-containing waste gas according to claim 3, characterized in that: The suction pump device comprises a fixing rod (17), wherein the fixing rod (17) is fixedly connected to the outer wall of the recovery box (11), one end of the fixing rod (17) is fixedly connected to a disc shell (2), a circular plate (20) is rotatably connected inside the disc shell (2), an annular cavity is formed between the outer ring side wall of the circular plate (20) and the inner ring side wall of the disc shell (2), a middle section of the oxygen inhalation hose (3) and the smoking hose (4) are both located in the annular cavity, the two ends of the oxygen inhalation hose (3) and the smoking hose (4) respectively penetrate the side wall of the disc shell (2), and the circular plate (20) is rotatably connected to the disc shell (2). Two extrusion blocks (21) are fixedly connected to the outer ring side wall of the disc shell (20), a protective shell (1) is fixedly connected to the outer side wall of the disc shell (2), a motor (18) is fixedly connected inside the protective shell (1), and a rotating rod (19) is fixedly connected to the output shaft of the motor (18), the rotating rod (19) passes through the disc shell (2) and is rotatably connected to the two side walls of the disc shell (2), one end of the rotating rod (19) is fixedly connected to the central side wall of the uppermost gear (6), and the rotating rod (19) passes through and is fixedly connected to the side wall of the circular plate (20).

5. The device for recovering indium from indium-containing waste gas according to claim 4, characterized in that: The oxygen inhalation hose (3) and the smoking hose (4) are symmetrically arranged at a section located in the annular cavity.

6. The device for recovering indium from indium-containing waste gas according to claim 5, characterized in that: When the circular plate (20) rotates, the two squeezing blocks (21) on the side wall of the circular plate (20) rotate to alternately cyclically squeeze the oxygen inhalation hose (3) and the smoking hose (4), so that the oxygen inhalation hose (3) and the smoking hose (4) generate suction force, thereby sucking oxygen and indium-containing waste gas into the blowing pipe (7).

7. The device for recovering indium from indium-containing waste gas according to claim 6, characterized in that: The oxygen supply equipment is an oxygen tank.

8. The device for recovering indium from indium-containing waste gas according to claim 7, characterized in that: The spiral direction on each spiral rod (5) is opposite to the spiral direction on the adjacent spiral rod (5).

9. The device for recovering indium from indium-containing waste gas according to claim 8, characterized in that: The reaction channel (12) is filled with sulfuric acid.

10. The device for recovering indium from indium-containing waste gas according to claim 9, characterized in that: The spiral rod (5) is made of a material resistant to sulfuric acid corrosion.

Images