An ultrasonic external field enhanced air-filled leaching tank

Abstract

This invention relates to an ultrasonic field-enhanced gas-filled leaching tank, comprising a tank body, a stirring device, a gas filling device, and an ultrasonic generator. The tank body has a leaching chamber with an open upper end. The stirring head of the stirring device is located inside the leaching chamber. The gas filling device includes a gas filling pipe, with its inlet located outside the leaching chamber for connecting to an external gas supply device, and its outlet located inside the leaching chamber. The ultrasonic generator includes an ultrasonic probe, which is disposed inside the gas filling pipe to generate an ultrasonic field enhancement effect when gas is transported through the gas filling pipe. Compared with the prior art, the ultrasonic field-enhanced gas-filled leaching tank provided by this invention enhances the synergistic oxidation of oxidants and non-ferrous metals through ultrasound, achieving rapid and efficient leaching of non-ferrous metals. The advantage of this technology is that ultrasound can generate strong liquid flow shear force and microbubbles, increasing the contact area between the liquid and the metal surface, promoting the reaction between the oxidant and the non-ferrous metals, and improving leaching efficiency.

Description

Technical Field

[0001] This invention relates to the field of non-ferrous metal leaching and recycling technology, and in particular to an ultrasonic external field enhanced gas-filled leaching tank. Background Technology

[0002] Copper is an important non-ferrous metal with excellent electrical and thermal conductivity and corrosion resistance, and is widely used in electronics, communications, aerospace, chemical, and medical fields. Based on the form in which copper exists, copper ores can be classified into carbonate copper ores and oxide copper ores, among others.

[0003] The main methods for extracting copper from copper ore include hydrometallurgy, thermal smelting, electrolysis, and flotation. Methods for extracting copper from industrial solid waste (anode mud, copper-containing waste, etc.) include pyrometallurgical processes, combined beneficiation and smelting processes, all-hydrometallurgical processes, and combined pyrometallurgical and hydrometallurgical processes. Hydrometallurgy is a commonly used method, and its process includes leaching, purification, extraction, and electrowinning. During leaching, oxidants are often added to accelerate copper dissolution, thereby improving leaching efficiency. Commonly used oxidants include hydrogen peroxide, sulfuric acid, and chlorine oxides.

[0004] However, traditional wet leaching suffers from problems such as slow reaction rates, low leaching rates, and secondary pollution. In recent years, ultrasonic technology has been widely used in the leaching and recovery field, attracting much attention due to its ability to accelerate reactions and improve leaching efficiency. However, using ultrasonic technology alone still has drawbacks such as high consumption of chemical reagents and high energy consumption. Summary of the Invention

[0005] In view of this, it is necessary to provide an ultrasonic field-enhanced gas-filled leaching tank to solve the technical problem that the leaching effect is still not good when using ultrasound alone in the prior art.

[0006] This invention provides an ultrasonic field-enhanced gas-filled leaching tank, which includes: a tank body, a stirring device, a gas filling device, and an ultrasonic generator. The tank body has a leaching chamber with an upper opening. The stirring head of the stirring device is located inside the leaching chamber. The gas filling device includes a gas filling pipe. The gas inlet of the gas filling pipe is located outside the leaching chamber for connecting to an external gas supply device, and the gas outlet of the gas filling pipe is located inside the leaching chamber. The ultrasonic generator includes an ultrasonic probe, which is disposed inside the gas filling pipe to generate an ultrasonic field enhancement effect when the gas is transported through the gas filling pipe.

[0007] Furthermore, the stirring device includes a first driving member, a transmission shaft, and a stirring head. The first driving member is fixed on the tank and located outside the leaching chamber. The first driving member is connected to the transmission shaft, and the transmission shaft is fixedly connected to the stirring head. The first driving member can drive the stirring head to rotate via the transmission shaft.

[0008] Furthermore, the stirring head includes a rotating part and a fixed part. The drive shaft, the rotating part, and the fixed part are arranged coaxially. The rotating part is fixedly connected to the lower end of the drive shaft, and the fixed part is fixedly connected to the tank. The first driving member can drive the rotating part to rotate relative to the fixed part via the drive shaft.

[0009] Furthermore, the rotating part has a plurality of first blades evenly distributed along its radial direction, and the fixing part has a plurality of second blades. The second blades are arc-shaped and evenly distributed around the axis of the fixing part, and the second blades are arranged outside the first blades.

[0010] Furthermore, the fixing part also includes an upper plate, the lower surface of which is connected to the second blade, and a plurality of through holes are formed on the upper plate to connect the gap between the first blade and the second blade.

[0011] Furthermore, the inflation pipe includes an air inlet section, a connecting section, and an air outlet section connected in sequence. The connecting section is sleeved on the drive shaft and is fixedly connected to the fixing part and the groove respectively.

[0012] Furthermore, it also includes a separator built into the leaching chamber, which is fixedly connected to the tank to separate an aeration chamber with an upper opening from the leaching chamber, and the air outlet section is connected to the aeration chamber.

[0013] Furthermore, the ultrasonic generator also includes an installation tube and a sealing head. One end of the installation tube is connected to the connecting section, and the other end extends through the tank to the outside of the leaching chamber. The sealing head is fixedly connected to the ultrasonic probe, and the sealing head can also be detachably sealed to the port of the installation tube located outside the leaching chamber.

[0014] Furthermore, it also includes a slag scraping device, which includes a second driving member and a scraper. The second driving member is fixed on the tank and is connected to the scraper for transmission, so as to drive the scraper to rotate at the opening of the leaching chamber.

[0015] Furthermore, it also includes a discharge pipe that penetrates the tank and connects to the bottom of the leaching chamber.

[0016] Compared with existing technologies, the ultrasonic external field enhanced aerated leaching tank provided by this invention enhances the synergistic oxidation of oxidants and non-ferrous metals through ultrasound, achieving rapid and efficient leaching of non-ferrous metals. The advantage of this technology lies in the fact that ultrasound can generate strong liquid shear force and microbubbles, increasing the contact area between the liquid and the metal surface, promoting the reaction between the oxidant and the non-ferrous metals, thereby improving leaching efficiency.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 A schematic diagram of a structural embodiment of the ultrasonic external field enhanced gas-filled leaching tank provided by the present invention;

[0020] Figure 2 for Figure 1 Internal structure diagram

[0021] Figure 3 for Figure 2 Schematic diagram of the rotating part;

[0022] Figure 4 for Figure 2 A schematic diagram of the structure of the central fixing part. Detailed Implementation

[0023] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0024] Please see Figure 1 This invention provides an ultrasonic external field enhanced gas-filled leaching tank. The ultrasonic external field enhanced gas-filled leaching tank includes a tank body 1, a stirring device 2, a gas filling device, and an ultrasonic generator 4. The tank body 1 has a leaching chamber with an open upper end. The stirring head of the stirring device 2 is located inside the leaching chamber and is used to stir the leaching solution, ensuring thorough mixing of the ore and oxidant. The gas filling device includes a gas filling pipe 3. The inlet end of the gas filling pipe 1 is located outside the leaching chamber for connecting to external gas supply equipment, such as a gas pipe, air pump, or high-pressure gas cylinder. The outlet end of the gas filling pipe 3 is located inside the leaching chamber. The ultrasonic generator 4 includes an ultrasonic probe (not shown), which is disposed inside the gas filling pipe 3 to generate an ultrasonic external field enhancement effect when gas is transported through the gas filling pipe 3.

[0025] Ultrasound is a high-frequency vibration wave that can promote the movement of reactant molecules and the reaction rate through mechanical, thermal, and chemical effects. Using an ultrasonic-enhanced aerated high-efficiency leaching tank as the leaching equipment offers several advantages. First, air is introduced during the leaching process to replace the addition of chemical oxidants. This not only reduces production costs and minimizes equipment corrosion but also eliminates the safety hazards associated with chemical oxidants during production. Second, the coupling effect of ultrasonic enhancement and mechanical stirring allows for a high copper leaching rate at lower reagent concentrations and shorter leaching times, significantly improving production efficiency. Furthermore, the thermal effect of ultrasound can generate localized temperature rises, accelerating the reaction rate. By controlling the aeration rate and ultrasonic power, the leaching tank can effectively control the temperature during the leaching process, achieving a highly efficient, low-consumption, and safe copper leaching process.

[0026] Please see Figure 2 In some embodiments, the stirring device 2 includes a first driving member 21, a drive shaft 22, and a stirring head 23. The first driving member 21 is fixedly mounted on the tank 1 and located outside the leaching chamber. The first driving member 21 is connected to the drive shaft 22, and the drive shaft 22 is fixedly connected to the stirring head 23. The first driving member 21 can drive the stirring head 23 to rotate via the drive shaft 22 to achieve the stirring effect. The first driving member 21 is generally a motor with a suitable power rating.

[0027] Please see Figure 3 and Figure 4 In some embodiments, the stirring head 23 includes a rotating part 231 and a fixed part 232, and the drive shaft 22, the rotating part 231 and the fixed part 232 are arranged coaxially. The rotating part 231 is fixedly connected to the lower end of the drive shaft 22, and the fixed part 232 is fixedly connected to the tank 1. The first driving member 21 can drive the rotating part 231 to rotate relative to the fixed part 232 via the drive shaft 22.

[0028] The rotating part 231 has a plurality of first blades evenly distributed radially thereon, and the fixing part 232 has a plurality of second blades. The second blades are arc-shaped and evenly distributed around the axis of the fixing part, and are arranged outside the first blades. The fixing part 232 also includes an upper plate, the lower surface of which is connected to the second blades. The upper plate has a plurality of through holes that connect the gaps between the first blades and the second blades.

[0029] When the first driving member 21 drives the rotating part 231 to rotate, the first blade rotates at high speed relative to the second blade, and a strong convection is formed between the first blade and the second blade, which draws the leachate in from the outside and sprays it out from the through hole, producing a good dispersion effect.

[0030] In some embodiments, the inflation tube 3 includes an air inlet section 31, a connecting section 32, and an air outlet section 33 connected in sequence. The connecting section 32 is sleeved on the drive shaft 22 and is fixedly connected to the fixing part 232 and the groove 1 respectively.

[0031] In some embodiments, the leaching tank further includes a separator 5 built into the leaching chamber. The separator 5 is fixedly connected to the tank body 1 to separate an aeration chamber with an upper opening from the leaching chamber. The air outlet section 33 is connected to the aeration chamber. Ore can be added into the aeration chamber, aerated, and then overflow into the leaching chamber.

[0032] The ultrasonic generator 4 also includes a mounting tube 41 and a sealing head 42. One end of the mounting tube 41 is connected to the connecting section 32, and the other end extends through the tank 1 to the outside of the leaching chamber. The sealing head 42 is fixedly connected to the ultrasonic probe, and the sealing head 42 can also be detachably sealed to the port of the mounting tube 41 located outside the leaching chamber. In use, the ultrasonic probe is built into the mounting tube 41 to apply ultrasonic field enhancement to the air flowing through the connecting section 32.

[0033] In some embodiments, the ultrasonic field-enhanced aerated leaching tank further includes a slag scraping device 6. The slag scraping device 6 includes a second driving member 61 and a scraper 62. The second driving member 61 is fixed to the tank body 1 and is connected to the scraper 62 for transmission, thereby driving the scraper 62 to rotate at the opening of the leaching chamber. The second driving member 61 is generally a motor of suitable power and can be directly connected to the scraper 62, or connected via an intermediate connecting member, such as a pulley or gear set.

[0034] The leaching tank is also equipped with a discharge pipe (not shown), which runs through the tank body 1 and connects to the bottom of the leaching chamber for discharging the treated ore.

[0035] This ultrasonic external field enhanced aerated leaching tank uses an aerated mechanical stirring tank as the leaching equipment. Ultrasonic waves are placed at the bottom for external field enhancement, with air as the oxidant and sulfuric acid as the reagent to leach copper from copper-containing ores and solid waste. Taking the recovery of copper and high-purity silicon powder from organosilicon waste catalysts as an example, the ultrasonic waves work by combining the ultrasonic probe at the bottom of the leaching chamber with the oxidant to produce a synergistic oxidation effect. This allows copper to be rapidly and efficiently oxidized and leached, while carbon powder floats on the liquid surface. It is then collected and separated by a top scraper, ultimately achieving efficient copper extraction and silicon powder purification.

[0036] Its advantages include: 1. Green production: Replacing traditional oxidants such as xanthates with air achieves green production, saves on reagent consumption, and reduces environmental pollution. 2. High-efficiency extraction: The synergistic effect of the leaching agent, air, and ultrasound achieves high-efficiency copper extraction. 3. Simplified recovery process: Separation of carbon powder and silicon powder is achieved in one step, improving the purity of silicon powder in the leaching residue and simplifying the recovery process. 4. Improved reagent utilization: Through a combined aeration-stirring-ultrasound approach, the reagents are uniformly dispersed, maximizing their effective utilization and reducing reagent dosage. Overall, this method for recovering copper has advantages such as high efficiency, environmental friendliness, and simplicity, and is expected to be widely used in industrial production.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An ultrasonic external field enhanced gas-filled leaching tank, characterized in that, It includes: a tank The apparatus includes a stirring device, an air filling device, and an ultrasonic generator. The tank has an leaching chamber with an open top. The stirring head of the stirring device is located inside the leaching chamber. The air filling device includes an air filling pipe with its inlet end located outside the leaching chamber for connecting to an external air supply device and its outlet end located inside the leaching chamber. The ultrasonic generator includes an ultrasonic probe located inside the air filling pipe for generating an ultrasonic field enhancement effect when gas is transported through the air filling pipe. The stirring device includes a first driving member, a transmission shaft, and a stirring head. The first driving member is driven to the transmission shaft. The stirring head includes a rotating part and a fixed part. The transmission shaft, the rotating part, and the fixed part are arranged coaxially. The rotating part is fixedly connected to the lower end of the transmission shaft, and the fixed part is fixedly connected to the tank. The first driving member can drive the rotating part to rotate relative to the fixed part via the transmission shaft. The rotating part has a plurality of first blades evenly distributed radially. The fixed part has a plurality of second blades. The second blades are arc-shaped and evenly distributed around the axis of the fixed part. The second blades are arranged outside the first blades. The fixed part also includes an upper plate. The lower surface of the upper plate is connected to the second blades. A plurality of through holes are formed on the upper plate to connect the gaps between the first blades and the second blades.

2. The ultrasonic external field enhanced gas-filled leaching tank according to claim 1, characterized in that, The first driving member is fixed on the tank and located outside the leaching chamber.

3. The ultrasonic external field enhanced gas-filled leaching tank according to claim 1, characterized in that, The inflation tube includes an air inlet section, a connecting section, and an air outlet section connected in sequence. The connecting section is sleeved on the drive shaft and is fixedly connected to the fixing part and the groove respectively.

4. The ultrasonic external field enhanced gas-filled leaching tank according to claim 3, characterized in that, It also includes a separator built into the leaching chamber, the separator being fixedly connected to the tank body to separate an aeration chamber with an upper opening from the leaching chamber, and the air outlet section being connected to the aeration chamber.

5. The ultrasonic external field enhanced gas-filled leaching tank according to claim 3, characterized in that, The ultrasonic generator also includes an installation tube and a sealing head. One end of the installation tube is connected to the connecting section, and the other end extends through the tank to the outside of the leaching chamber. The sealing head is fixedly connected to the ultrasonic probe, and the sealing head can also be detachably and sealingly connected to the port of the installation tube located outside the leaching chamber.

6. The ultrasonic external field enhanced gas-filled leaching tank according to claim 1, characterized in that, It also includes a slag scraping device, which includes a second driving member and a scraper. The second driving member is fixed on the tank and is connected to the scraper for driving the scraper to rotate at the opening of the leaching chamber.

7. The ultrasonic external field enhanced gas-filled leaching tank according to claim 1, characterized in that, It also includes a discharge pipe that extends through the tank and connects to the bottom of the leaching chamber.

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