Redox multi-stage hydrometallurgy device

Abstract

The invention discloses an oxidation-reduction multi-section type hydrometallurgy device in the technical field of hydrometallurgy, which comprises a reduction electrolytic bath and an oxidation electrolytic bath, the reduction electrolytic bath is provided with a to-be-reduced mineral inlet and is communicated with a reducing substance extraction and separation chamber as an outlet of the reduction electrolytic bath, and the oxidation electrolytic bath is provided with a to-be-oxidized mineral inlet and is communicated with a reducing substance extraction and separation chamber as an outlet of the reduction electrolytic bath. An oxidizing substance extraction and separation chamber is communicated to serve as an outlet of the oxidizing electrolytic tank; the reducing substance extraction and separation chamber is communicated with the oxidizing electrolytic bath through a material pipe, and a valve is arranged on the material pipe; the oxidizing substance extraction and separation chamber is communicated with the reducing electrolytic bath through a material pipe, and a valve is arranged on the material pipe; target product outlets are formed in the reducing substance extraction and separation chamber and the oxidizing substance extraction and separation chamber. Oxidation electrolytic baths and reduction electrolytic baths are arranged according to oxidation or reduction extraction modes of target components in different minerals, the reduction electrolytic baths and the oxidation electrolytic baths can be used in an independent mode, a series connection mode and a parallel connection mode, and hydrometallurgy target element extraction is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrometallurgy, and in particular to an oxidation-reduction multi-stage hydrometallurgy device. Background Art

[0002] Against the backdrop of growing demand for metal materials and increasingly scarce resources, hydrometallurgy, as a key technology for extracting valuable metals from ores or other metal-containing materials, is in a process of continuous evolution and innovation.

[0003] Traditional hydrometallurgical processes have exposed many limitations when faced with complex ore compositions and diverse metal extraction needs. For one thing, most conventional hydrometallurgical processes use only a single oxidation or reduction stage, making it difficult to effectively process ores containing metal elements in multiple valence states. For example, for iron ore containing both divalent and trivalent iron, as well as other transition metal ions, with complex and variable ratios of each metal, a single oxidation or reduction method cannot accurately control the conversion and separation of metals of different valence states, resulting in low metal recovery rates and a large amount of valuable metals remaining in the tailings, causing a serious waste of resources.

[0004] On the other hand, the traditional process steps lack consistency and lack close coordination and optimization between the various links. From leaching, separation to purification, the processes are relatively independent, and the transfer of intermediate materials is cumbersome. It is not only time-consuming and labor-intensive, but also prone to the introduction of impurities, making it difficult for the final product purity to meet the increasingly stringent requirements of high-end manufacturing for high-purity metals. Moreover, the traditional hydrometallurgical system lacks refined management of the use of chemical reagents, often with problems of excessive reagent input or low utilization, which not only increases production costs, but also increases the burden of subsequent wastewater treatment, putting greater pressure on the environment.

[0005] With the rapid development of cutting-edge fields such as electronics, new energy, and aerospace, the demand for high-purity rare metals such as lithium, cobalt, nickel, and rare earth elements has exploded. These metals are found in complex ores and contain numerous associated elements. Existing simple hydrometallurgical methods are no longer sufficient for efficient and environmentally friendly extraction. Summary of the Invention

[0006] In order to overcome the problem that the separation and extraction rate of valuable components in existing hydrometallurgical processes is low, resulting in a large amount of valuable components remaining in the by-products and causing waste, the present invention provides a redox staged hydrometallurgical device.

[0007] The technical solution adopted by the present invention to solve its technical problem is: The invention discloses an oxidation-reduction multi-stage hydrometallurgical device, comprising a reduction electrolytic cell and an oxidation electrolytic cell. The reduction electrolytic cell is provided with an inlet for the mineral to be reduced and is connected to a reducing substance extraction and separation chamber as an outlet of the reduction electrolytic cell. The oxidation electrolytic cell is provided with an inlet for the mineral to be oxidized and is connected to an oxidizing substance extraction and separation chamber as an outlet of the oxidation electrolytic cell. The reducing substance extraction and separation chamber is connected to the oxidation electrolytic cell via a material pipe with a valve provided on the material pipe, and the oxidizing substance extraction and separation chamber is connected to the reduction electrolytic cell via a material pipe with a valve provided on the material pipe. Both the reducing substance extraction and separation chamber and the oxidizing substance extraction and separation chamber are provided with outlets for target products.

[0008] In this application, oxidation electrolytic cells and reduction electrolytic cells are set up respectively for the oxidation or reduction extraction of target components in different minerals. In order to meet the requirements of different minerals, the reduction electrolytic cells and oxidation electrolytic cells can be used individually, in series and in parallel to enhance the extraction of target elements by hydrometallurgy.

[0009] Furthermore, the reduction electrolytic cell is a double-walled structure with an interlayer, the inner wall of which is a conductive electrode serving as the reduction cell anode, and a reduction cell cathode is provided in the reduction electrolytic cell.

[0010] Furthermore, a plurality of reduction cell cathodes are arranged in the reduction electrolytic cell.

[0011] Furthermore, the cathode material of the reduction electrolytic cell is an alloy, ruthenium-iridium, graphite, titanium or platinum electrode, and its shape is thorn-shaped, spiral-shaped or helical; the anode material of the reduction cell is an alloy or ruthenium-iridium.

[0012] Furthermore, the oxidation electrolytic cell is a double-walled structure with an interlayer, the inner wall of which is a conductive electrode serving as the oxidation cell cathode, and an oxidation cell anode is provided in the oxidation electrolytic cell.

[0013] Furthermore, a plurality of oxidation tank anodes are arranged in the oxidation electrolytic tank.

[0014] Furthermore, the anode material of the oxidation electrolytic cell is an alloy, ruthenium-iridium, graphite, titanium or platinum electrode, and its shape is thorn-shaped, spiral-shaped or helical; the cathode material of the oxidation cell is an alloy or ruthenium-iridium.

[0015] Furthermore, the electrolysis voltage of the reduction electrolytic cell and the oxidation electrolytic cell is 0.6V-360V, and the electrolysis time is 30min-180min.

[0016] Furthermore, the minerals entering the reduction electrolytic cell or the oxidation electrolytic cell are hydrometallurgical, and the solid-liquid mass ratio of the minerals to the extraction reagents is between 1:2 and 1:50.

[0017] Furthermore, the power source of the reduction electrolytic cell and the oxidation electrolytic cell is solar photovoltaic panels.

[0018] The beneficial effects of the present invention are: Oxidation electrolytic cells and reduction electrolytic cells are set up respectively for the oxidation or reduction extraction of target components in different minerals. In order to meet the requirements of different minerals, the reduction electrolytic cells and oxidation electrolytic cells can be used separately, in series or in parallel to enhance the extraction of target elements by hydrometallurgy. It can precisely convert metal elements of different valence states in ores. For example, for complex ores containing multiple variable-valence transition metals, during the initial oxidation process, low-valence metal ions can be gradually oxidized to high-valence states, making them more soluble in the leachate. Subsequently, through a precisely controlled reduction stage, high-valence metal ions can be reduced and precipitated as needed. Compared with traditional single-stage hydrometallurgy, it can improve metal recovery rates, greatly reduce the residual valuable metals in tailings, and achieve deep resource utilization. From a sustainable development perspective, whether it's low-grade, highly impure ores or difficult-to-process rare earth ores, this technology and system, with its flexible and versatile multi-stage redox strategy, can quickly adjust process parameters based on ore characteristics, achieving "tailor-made" metal extraction. This broadens the range of ore resources available to enterprises and injects strong momentum into the long-term and stable development of the metal industry. High metal recovery rates mean more metal products can be produced per unit of ore, significantly reducing the ore procurement cost per ton of metal. Overall production costs can be reduced by approximately 30% compared to traditional hydrometallurgical processes, significantly enhancing the company's market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the oxidation-reduction multi-stage hydrometallurgical device provided by the present invention.

[0020] Markings in the figure are: Ⅰ-reduction electrolytic cell, Ⅱ-oxidation electrolytic cell, 1-conductive wire, 2-power supply, 3-reduction cell cathode, 4-inlet of mineral to be reduced, 5-reactor wall interlayer, 6-material pipe, 7-reduction reactor, 8-multi-cathode reduction chamber, 9-reducing substance extraction and separation chamber, 10-oxidizing substance extraction and separation chamber, 11-target product outlet, 12-inlet of mineral to be oxidized, 13-valve, 14-oxidation cell cathode, 15-oxidation cell anode, 16-reduction cell anode, 17-solar photovoltaic panel. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] like Figure 1 As shown, the present invention provides a redox multi-stage hydrometallurgical device.

[0024] An oxidation-reduction multi-stage hydrometallurgical device comprises a reduction electrolytic cell I and an oxidation electrolytic cell II. The reduction electrolytic cell I is provided with an inlet 4 for the mineral to be reduced and is connected to a reducing substance extraction and separation chamber 9 as an outlet of the reduction electrolytic cell I. The oxidation electrolytic cell II is provided with an inlet 12 for the mineral to be oxidized and is connected to an oxidizing substance extraction and separation chamber 10 as an outlet of the oxidation electrolytic cell II. The reducing substance extraction and separation chamber 9 is connected to the oxidation electrolytic cell II via a material pipe 6 and a valve 13 is provided on the material pipe 6. The oxidizing substance extraction and separation chamber 10 is connected to the reduction electrolytic cell I via a material pipe 6 and a valve 13 is provided on the material pipe 6. Both the reducing substance extraction and separation chamber 9 and the oxidizing substance extraction and separation chamber 10 are provided with a target product outlet 11.

[0025] In this application, oxidation electrolytic cell II and reduction electrolytic cell I are respectively set up for the oxidation or reduction extraction of target components in different minerals. In order to meet the requirements of different minerals, reduction electrolytic cell I and oxidation electrolytic cell II can be used in three ways: alone, in series, and in parallel to enhance the extraction of target elements by hydrometallurgy. It can precisely convert metal elements of varying valences within ores. For example, for complex ores containing multiple variable-valence transition metals, the initial oxidation process can gradually oxidize low-valence metal ions to high-valence states, making them more soluble in the leachate. Subsequently, a precisely controlled reduction stage allows the high-valence metal ions to be reduced and precipitated as needed. Compared to traditional single-stage hydrometallurgy, this process can improve metal recovery rates, significantly reduce the amount of valuable metals remaining in tailings, and achieve intensive resource utilization.

[0026] From a sustainable development perspective, whether it's low-grade, highly impure ores or difficult-to-process rare earth ores, this technology and system, with its flexible and versatile multi-stage redox strategy, can quickly adjust process parameters based on ore characteristics, achieving "tailor-made" metal extraction. This broadens the range of ore resources available to enterprises and injects strong momentum into the long-term and stable development of the metal industry. High metal recovery rates mean more metal products can be produced per unit of ore, significantly reducing the ore procurement cost per ton of metal. Overall production costs can be reduced by approximately 30% compared to traditional hydrometallurgical processes, significantly enhancing the company's market competitiveness.

[0027] Overall, the present invention demonstrates a simple process and low cost, enabling efficient extraction of target components from minerals. The extraction efficiency of valuable components can be increased by 20% to 50%, while reducing costs by 30% and significantly reducing solid waste generation. Therefore, the present invention not only significantly improves the extraction efficiency of target elements but also reduces solid waste production, demonstrating broad application and development prospects.

[0028] Furthermore, the reduction electrolytic cell I is a double-walled structure with an interlayer, the inner wall of which is a conductive electrode serving as the reduction cell anode 16 , and a reduction cell cathode 3 is provided in the reduction electrolytic cell I.

[0029] Specifically, the reduction electrolytic cell I has a reduction reactor 7 as the main structure of the electrolytic cell, the reduction reactor 7 has a reactor wall interlayer 5, the inner wall of the reduction reactor 7 is a conductive electrode serving as the reduction cell anode 16, and a multi-cathode reduction cavity 8 is formed within the inner wall of the reactor, with multiple reduction cell cathodes 3 evenly arranged.

[0030] Furthermore, the cathode material of the reduction electrolytic cell I is an alloy, ruthenium-iridium, graphite, titanium or platinum electrode, and its shape is thorn-shaped, spiral-shaped or helical; the material of the reduction cell anode 16 is an alloy or ruthenium-iridium.

[0031] Furthermore, the oxidation electrolytic cell II is a double-walled structure with an interlayer, the inner wall of which is a conductive electrode serving as the oxidation cell cathode 14, and an oxidation cell anode 15 is provided in the oxidation electrolytic cell II.

[0032] Specifically, the oxidation electrolytic cell II has an oxidation reactor as the main structure of the electrolytic cell, the oxidation reactor has a reactor wall interlayer 5, the inner wall of the oxidation reactor is a conductive electrode serving as the oxidation cell cathode 14, and a multi-anodized cavity is formed within the inner wall of the reactor, with multiple oxidation cell anodes 15 evenly arranged.

[0033] Furthermore, the anode material of the oxidation electrolytic cell II is an alloy, ruthenium-iridium, graphite, titanium or platinum electrode, and its shape is thorn-shaped, spiral-shaped or helical; the cathode material of the oxidation cell 14 is an alloy or ruthenium-iridium.

[0034] As described above, the reduction electrolytic cell I and the oxidation electrolytic cell II in this embodiment have the same structure, except that the positive and negative connections are reversed. Depending on the existence form of the target extract, the powdered concentrate mineral and the extraction agent are mixed and then enter the reduction electrolytic cell I or the oxidation electrolytic cell II, or enter the electrolytic cell in sections to extract the reducing minerals and oxidizing minerals in the minerals separately.

[0035] In other words, Reduction Electrolytic Cell I and Oxidation Electrolytic Cell II can operate independently, allowing the mineral to be reduced or oxidized alone. Alternatively, reduction can be performed first, followed by oxidation after the reducing substances are extracted. Alternatively, oxidation can be performed first, followed by reduction after the oxidizing substances are extracted. This solution can significantly improve the mineral quality and reduce the subsequent extraction and separation and purification costs.

[0036] Furthermore, the electrolysis voltage of the reduction electrolytic cell I and the oxidation electrolytic cell II is 0.6V-360V, and the electrolysis time is 30min-180min.

[0037] Furthermore, the minerals entering the reduction electrolytic cell I or the oxidation electrolytic cell II are hydrometallurgical, and the solid-liquid mass ratio of the minerals to the extraction reagents is between 1:2 and 1:50.

[0038] Furthermore, the power source of the reduction electrolytic cell I and the oxidation electrolytic cell II is the solar photovoltaic panel 17 .

[0039] Specifically, it includes a power source 2 and a solar photovoltaic panel 17 , and the solar photovoltaic panel 17 is used to supply power to the power source 2 .

[0040] The anode of the power supply 2 corresponding to the reduction electrolytic cell I is connected to the inner wall of the reduction electrolytic cell I through the conductive wire 1, and the cathode of the power supply 2 corresponding to the reduction electrolytic cell I is connected to the cathode 3 of the reduction cell.

[0041] The cathode of the power supply 2 corresponding to the oxidation electrolytic cell II is connected to the inner wall of the oxidation electrolytic cell II through the conductive wire 1, and the anode of the power supply 2 corresponding to the oxidation electrolytic cell II is connected to the cathode 14 of the oxidation cell.

[0042] The implementation of the above embodiment is as follows.

[0043] First, the equipment was manufactured according to the equipment processing parameters shown in Table 1.

[0044] Table 1 Equipment processing parameters Based on the aforementioned equipment, electrolysis processes were carried out for different minerals, and the results are shown in Table 2.

[0045] Table 2 Electrolysis process and effects The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Redox multi-stage hydrometallurgical device, characterized in that: The invention comprises a reduction electrolytic cell (I) and an oxidation electrolytic cell (II), wherein the reduction electrolytic cell (I) is provided with an inlet (4) for a mineral to be reduced and is connected to a reducing substance extraction and separation chamber (9) as an outlet of the reduction electrolytic cell (I), and the oxidation electrolytic cell (II) is provided with an inlet (12) for a mineral to be oxidized and is connected to an oxidizing substance extraction and separation chamber (10) as an outlet of the oxidation electrolytic cell (II); The reducing substance extraction and separation chamber (9) is connected to the oxidation electrolytic cell (II) through the material pipe (6), and the material pipe (6) is provided with a valve (13); the oxidizing substance extraction and separation chamber (10) is connected to the reduction electrolytic cell (I) through the material pipe (6), and the material pipe (6) is provided with a valve (13); The reducing substance extraction and separation chamber (9) and the oxidizing substance extraction and separation chamber (10) are both provided with a target product outlet (11).

2. The oxidation-reduction multi-stage hydrometallurgical device according to claim 1, characterized in that: The reduction electrolytic cell (I) is a double-walled structure with an interlayer, the inner wall of which is a conductive electrode serving as a reduction cell anode (16), and a reduction cell cathode (3) is provided in the reduction electrolytic cell (I).

3. The oxidation-reduction multi-stage hydrometallurgical device according to claim 2, characterized in that: A plurality of reduction cell cathodes (3) are arranged in the reduction electrolytic cell (I).

4. The oxidation-reduction multi-stage hydrometallurgical device according to claim 2, characterized in that: The cathode material of the reduction electrolytic cell (I) is an alloy, ruthenium-iridium, graphite, titanium or platinum electrode, and the shape is thorn-shaped, spiral-shaped or helical; the material of the reduction cell anode (16) is an alloy or ruthenium-iridium.

5. The oxidation-reduction multi-stage hydrometallurgical device according to claim 1, characterized in that: The oxidation electrolytic cell (II) is a double-walled structure with an interlayer, the inner wall of which is a conductive electrode serving as an oxidation cell cathode (14), and an oxidation cell anode (15) is provided in the oxidation electrolytic cell (II).

6. The oxidation-reduction multi-stage hydrometallurgical device according to claim 5, characterized in that: A plurality of oxidation tank anodes (15) are arranged in the oxidation electrolytic cell (II).

7. The oxidation-reduction multi-stage hydrometallurgical device according to claim 5, characterized in that: The anode material of the oxidation electrolytic cell (II) is an alloy, ruthenium-iridium, graphite, titanium or platinum electrode, and the shape is thorn-shaped, spiral-shaped or helical; the cathode material of the oxidation cell (14) is an alloy or ruthenium-iridium.

8. The oxidation-reduction multi-stage hydrometallurgical device according to claim 1, characterized in that: The electrolysis voltage of the reduction electrolytic cell (I) and the oxidation electrolytic cell (II) is 0.6V-360V, and the electrolysis time is 30min-180min.

9. The oxidation-reduction multi-stage hydrometallurgical device according to claim 1, characterized in that: The minerals entering the reduction electrolytic cell (I) or the oxidation electrolytic cell (II) are hydrometallurgical, and the solid-liquid mass ratio of the minerals to the extraction reagents is between 1:2 and 1:

50.

10. The oxidation-reduction multi-stage hydrometallurgical device according to any one of claims 1 to 9, characterized in that: The electricity source for the reduction electrolytic cell (I) and the oxidation electrolytic cell (II) is solar photovoltaic panels (17).

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