Rotational flow electrolysis efficient copper extraction process

Abstract

The invention discloses an efficient copper extraction process through rotational flow electrolysis, and relates to the technical field of rotational flow electrolysis. Copper concentrate is fed into a pre-electrolysis liquid tank, is fed into an electrolyte circulating tank through a conveying pump, is fed into an electrolytic tank through a circulating pump, and is continuously separated out and deposited on a starting sheet of a cathode under the action of a direct-current electric field; gas generated by an anode enters a circulating tank along with liquid flow in a concentrated manner to be separated out, the separated gas is introduced into an acid mist absorption system in a concentrated manner to reach the standard for treatment, and concentration polarization is thoroughly eliminated by increasing the flowing speed of a solution and changing the flowing form of the solution, so that a product subjected to electrodeposition reaction is purer, and the current efficiency is higher; and the metal extraction process flow is simplified, so that the circulating liquid in the circulating tank is always kept at 15g / L or above, the efficiency of rotational flow electrolysis can be improved, and the copper extraction time can be shortened.

Description

Technical Field

[0001] The invention relates to the technical field of cyclone electrolysis, in particular to a cyclone electrolysis high-efficiency copper extraction process. Background Art

[0002] Cyclone electrolysis is a new type of electrochemical deposition technology that can directly recover valuable metals from solutions containing multiple metal ions. By increasing the flow rate of the solution and changing the flow pattern of the solution, concentration polarization is completely eliminated. At the same time, the different precipitation potentials of metal ions in the solution are fully utilized, which greatly reduces the requirements for the copper ion content in the solution; the products of the electrodeposition reaction can be purer and the current efficiency can be higher; the existing devices take a long time to work, consume a lot of electricity, and have high operating costs. For example, it takes a long time to reduce from 30g / L to 1.5g / L, such as more than 22h or even longer. Based on this, a cyclone electrolysis efficient copper extraction process is produced, which can keep the copper ion concentration in the circulation tank above 15g / L, improve the electrolysis efficiency, shorten the copper extraction time, and reduce the operating cost. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a cyclonic electrolysis process for efficient copper extraction.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a cyclone electrolysis high-efficiency copper extraction process, wherein the copper concentrate is fed into a pre-electrolysis liquid tank, fed to an electrolyte circulation tank by a delivery pump, and fed into an electrolytic cell by a circulation pump, and continuously precipitates and deposits on a cathode starting plate under the action of a DC electric field, and the gas generated at the anode is concentrated into the circulation tank with the liquid flow to separate the gas, and the separated gas is concentratedly introduced into an acid mist absorption system for treatment up to standard.

[0005] Preferably, a concentrator is provided at one end of the cyclone electrolysis circulation tank, and when the copper ion concentration drops to 15 g / L, the membrane concentrator is started.

[0006] Preferably, the copper ions in the concentrated circulation tank: the lean liquid in the circulation tank is discharged from the fresh water end of the membrane concentration device, the copper ion concentration in the fresh water is generally less than 1.5g / L, and the concentrated liquid returns to the circulation tank to ensure that the circulating liquid in the circulation tank is always maintained above 15g / L.

[0007] Preferably, when the weight of the copper tube reaches 18-20 kg / tube, the system is shut down, the copper tube is taken out, and the starting electrode is put in to start the next cycle of electrolysis.

[0008] Preferably, the core of the membrane concentration is to use the membrane to intercept divalent ions (Cu2+ on the concentrated water side, and the Cu2+ concentration of the dilute liquid discharged from the dilute water side is below 1.5g / L.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The present invention completely eliminates concentration polarization by increasing the solution flow rate and changing the solution flow form, so that the product of the electrodeposition reaction is purer and the current efficiency is higher; the metal extraction process is simplified to ensure that the circulating liquid in the circulation tank is always maintained at more than 15g / L. Compared with the existing technology, the present invention not only improves the efficiency of cyclone electrolysis, but also shortens the copper extraction time, and reduces the power consumption, thereby reducing the operating cost, making the present invention more economical in actual work. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a process flow chart of efficient copper extraction by cyclone electrolysis according to the present invention; Figure 2 This is a conventional process flow chart for copper extraction by cyclone electrolysis according to the present invention. DETAILED DESCRIPTION

[0011] See also Figure 1 The present invention provides a technical solution: a cyclone electrolysis high-efficiency copper extraction process, wherein the copper concentrate is fed into the pre-electrolysis tank, and then fed into the electrolyte circulation tank by a delivery pump, and then fed into the electrolytic tank by a circulation pump. Under the action of the DC electric field, the copper concentrate is continuously precipitated and deposited on the cathode starting plate, and the gas generated by the anode is concentrated into the circulation tank with the liquid flow to separate the gas, and the separated gas is concentrated and introduced into the acid mist absorption system for standard treatment. A concentrator is arranged at one end of the cyclone electrolysis circulation tank. When the copper ion concentration is reduced to 15g / L, the membrane concentrator is started, and the concentrator circulation system is used to separate the gas. Copper ions in the ring tank: The lean liquid in the circulation tank is discharged from the fresh water end of the membrane concentration device. The copper ion concentration in the fresh water is generally less than 1.5g / L. The concentrated liquid returns to the circulation tank to ensure that the circulating liquid in the circulation tank is always maintained at more than 15g / L. When the weight of the copper tube reaches 18-20kg / root, the system is shut down to remove the copper tube, put in the starting electrode to start the next cycle of electrolysis. The core of membrane concentration is to use the membrane to intercept divalent ions (Cu2+ on the concentrated water side, and the Cu2+ concentration of the dilute liquid discharged from the fresh water side is below 1.5g / L.

Claims

1. A high-efficiency copper extraction process by cyclone electrolysis, characterized in that: The copper concentrate is fed into the pre-electrolysis tank, and then fed into the electrolyte circulation tank by a delivery pump, and then fed into the electrolytic tank by a circulation pump. Under the action of the DC electric field, the copper concentrate is continuously deposited on the cathode starting plate, and the gas generated by the anode is concentrated into the circulation tank with the liquid flow to separate the gas. The separated gas is concentrated and introduced into the acid mist absorption system for treatment up to the standard.

2. A cyclone electrolysis high-efficiency copper extraction process according to claim 1, characterized in that: A concentrator is arranged at one end of the cyclone electrolysis circulation tank, and when the copper ion concentration drops to 15 g / L, the membrane concentrator is started.

3. A cyclone electrolysis high-efficiency copper extraction process according to claim 1, characterized in that: The copper ions in the concentrated circulation tank: the lean liquid in the circulation tank is discharged from the fresh water end of the membrane concentration device, the copper ion concentration in the fresh water is generally less than 1.5g / L, and the concentrated liquid returns to the circulation tank to ensure that the circulating liquid in the circulation tank is always maintained above 15g / L.

4. A cyclone electrolysis high-efficiency copper extraction process according to claim 1, characterized in that: When the weight of the copper tube reaches 18-20 kg / tube, the system is shut down, the copper tube is taken out, and the starting electrode is put in to start the next cycle of electrolysis.

5. A cyclone electrolysis high-efficiency copper extraction process according to claim 1, characterized in that: The core of the membrane concentration is to use the membrane to intercept divalent ions (Cu2+ on the concentrated water side, and the Cu2+ concentration of the fresh water discharged from the fresh water side is below 1.5g / L.

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