Method and equipment for purifying metal extractant active clay

Abstract

The invention discloses a metal extractant active clay purification method and equipment thereof, the method comprises acid leaching, screening, magnetic separation and post-treatment, metal impurities and other impurities in active clay can be effectively removed, and the purity and separation efficiency of a metal extractant are improved. The preparation method specifically comprises the following steps: firstly, mixing active clay with an acid solution, carrying out acid leaching treatment, and dissolving water-soluble impurities and metal ions; then large-particle impurities are removed through screening; removing metal impurities by adopting a magnetic separation technology; and finally, removing residual moisture and tiny impurities through drying and filtering steps. The method can improve the purity of the active clay and the recovery rate of the metal extraction agent. The invention further provides corresponding purification equipment which comprises a pretreatment unit, a screening device, a mixed reaction unit and a drying and filtering unit. The equipment is reasonable in structure, can efficiently complete the active clay purification process, and is suitable for large-scale application in modern metal extraction production.

Description

Technical Field

[0001] The invention relates to the field of chemical engineering, and in particular to a method and equipment for purifying activated clay as a metal extractant. Background Art

[0002] Activated clay is widely used in the fields of metal extraction, catalytic reaction, pollutant adsorption, etc., especially in the extraction process of metal ions, and has important industrial value. In the process of metal extraction, activated clay is usually used as an important adsorbent or carrier, in contact with metal extractants, to play its role in separating, purifying and concentrating metal ions. However, the composition of activated clay itself is complex, containing a variety of impurities and chemical components. These impurities may react with metal extractants during the extraction process, resulting in the loss of activity of the metal extractants, affecting the extraction efficiency, and ultimately reducing the purity of the metal extraction.

[0003] After the activated clay comes into contact with the metal extractant, metal ions or other impurities may chemically react with the active ingredients in the extractant to form precipitates or other unstable compounds, further causing the performance of the metal extractant to deteriorate. For example, the activated clay may contain harmful elements or impurities, which will react with the metal extractant, reduce the effectiveness of the extractant, and even prevent the metal ions from being completely extracted from the solution during the extraction process, resulting in a waste of resources.

[0004] In addition, during the metal extraction process, the mixture of metal extractant and activated clay usually needs to be separated to obtain a high-purity extractant product. If the separation is incomplete or inefficient, impurities will remain in the extractant, affecting subsequent processing and application. Traditional separation methods, such as gravity sedimentation and filtration, are not only inefficient, but also unable to completely remove fine impurities in the clay, and often require multiple treatments, which is time-consuming and labor-intensive. Therefore, improving the separation efficiency of metal extractants and activated clay, especially removing impurities while maintaining the activity of metal extractants, has become a technical problem that needs to be solved urgently in the field of metal extraction.

[0005] In order to improve the purity of metal extractants and reduce the impurity content in activated clay, some methods have been proposed, such as purifying activated clay by physical separation, chemical reaction precipitation, membrane separation, etc. However, these methods still face certain limitations in practical applications. Physical separation methods are often unable to efficiently remove fine particles or soluble impurities in clay; chemical reaction precipitation methods may lead to the formation of insoluble precipitates, thereby increasing the difficulty of separation; although membrane separation methods are highly efficient, they often have problems such as membrane pollution and complex operation, which limits their application in large-scale production.

[0006] Therefore, the present invention aims to provide an innovative metal extractant activated clay purification method and equipment, which can effectively remove impurities in the activated clay, improve the purity and separation efficiency of the metal extractant, solve the deficiencies in the prior art, thereby meeting the needs of modern metal extraction processes and promoting technological progress in related fields. Summary of the invention

[0007] The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a method and equipment for purifying activated clay for metal extractants. The method can remove impurities in the activated clay and recover the metal extractant through multiple processing steps such as acid leaching, screening, and magnetic separation, thereby improving the purification efficiency and the purity of the extractant.

[0008] The technical solution adopted by the present invention to solve the above problems is: a method for purifying activated clay as a metal extractant, the specific steps of which include:

[0009] a. Pretreatment of activated clay: Mixing the activated clay with an acid solution and performing acid leaching treatment;

[0010] b. Screening and separation: After acid leaching, the activated clay is screened to remove large particles of impurities;

[0011] c. Magnetic separation: Mix the screened acid-leached activated clay with a metal extractant to remove metal impurities;

[0012] d. Post-treatment: filtering and drying the activated clay after magnetic separation.

[0013] Preferably, the acidic solution is sulfuric acid, hydrochloric acid or other strong acid solutions.

[0014] Preferably, the acid leaching time in step a is 30 minutes to 3 hours, and the acid concentration is 5% to 15%. The acid concentration and immersion time are adjusted and optimized according to different types of activated clay.

[0015] In addition, the present invention also provides a metal extractant activated clay purification device, the device sequentially comprising:

[0016] Pretreatment unit: a device for mixing activated clay with an acid solution and performing an acid leaching treatment;

[0017] Screening device: a device used to remove larger impurity particles from activated clay;

[0018] Mixing reaction unit: a device used to mix the activated clay after acid leaching with the metal extractant;

[0019] Drying and filtration unit: A device used to remove residual moisture and metal extractants from activated clay.

[0020] Preferably: the pre-processing unit comprises

[0021] Acid mixing tank: used to store acid solution and contain the activated clay to be treated;

[0022] Stirring device: including a stirrer and a driving motor for driving the stirrer to rotate, the stirrer is rotatably arranged in the acid liquid mixing tank;

[0023] Acid adding device: including an acid supply pipeline, a flow meter and an acid storage tank. The acid storage tank is connected to the acid mixing tank through the acid supply pipeline. The flow meter is arranged on the acid supply pipeline.

[0024] Temperature control system: includes a heater, a heating pipe and a temperature sensor. The heating pipe is arranged at the periphery of the acid mixing tank and is connected to the heater. The temperature sensor is arranged at the bottom or the middle of the acid mixing tank.

[0025] Preferably, the screening device comprises a screen and a vibrating device, and the vibrating device drives the screen to vibrate at a high frequency through a vibrating motor.

[0026] Preferably, the mixing reaction unit comprises a mixing tank and a magnetic separation device, the mixing tank is used for mixing the active clay and the metal extractant, and the magnetic separation device is installed beside the mixing tank for separating metal impurities by electromagnetic force.

[0027] Preferably, the drying and filtering unit comprises a drying furnace, a hot air blower and a filter screen, the drying furnace is arranged at the bottom of the mixing tank, the filter screen is obliquely arranged in the drying furnace, and the hot air blower is connected to the drying furnace through a hot air duct.

[0028] Compared with the prior art, the present invention has the following advantages and effects:

[0029] The present invention can efficiently remove impurities, especially metal impurities and soluble substances, in activated clay by introducing a multi-step treatment process including acid leaching, screening, magnetic separation and dry filtration. Through acid leaching, water-soluble impurities and metal ions can be effectively dissolved and removed; the screening step can further remove large particle impurities to ensure the uniformity of the material; magnetic separation effectively removes metal impurities through electromagnetic technology to improve the recovery rate and purity of metal extractants; finally, the dry filtration step ensures that the moisture and tiny impurities in the activated clay are completely removed to obtain activated clay with higher purity. This method not only improves the purity of the activated clay, but also can recover the metal extractant, avoiding the multiple treatments and high energy consumption problems in traditional separation methods.

[0030] In addition, the purification equipment provided by the present invention has a reasonable structural design and is easy to operate, and can realize an efficient and environmentally friendly treatment process in industrial production, meeting the needs of the modern metal extraction industry for efficient separation and resource recovery. Through the purification method and equipment of the present invention, it is possible to achieve efficient removal of impurities in the metal extraction process and improve the reuse rate of the metal extractant, which has significant economic benefits and environmental protection effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the framework of the metal extractant activated clay purification method of Example 1 of the present invention.

[0032] Figure 2 It is a schematic structural diagram of the metal extractant activated clay purification device according to Example 2 of the present invention.

[0033] Figure numbers: purification equipment 1, pretreatment unit 2, acid mixing tank 21, stirring device 22, agitator 221, drive motor 222, acid adding device 23, acid supply pipeline 231, flow meter 232, acid storage tank 233, temperature control system 24, heater 241, temperature sensor 242, heating pipe 243, screening device 3, screen 31, vibration device 32, mixing reaction unit 4, mixing tank 41, magnetic separation device 42, drying and filtering unit 5, drying furnace 51, hot air blower 52, filter 53, hot air pipe 54. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0035] Embodiment 1:

[0036] See also Figure 1 This embodiment provides a method for purifying activated clay as a metal extractant, and the specific steps are as follows:

[0037] a. Pretreatment of activated clay:

[0038] First, the activated clay to be treated is mixed with an acidic solution and subjected to acid leaching treatment. An appropriate acidic solution is selected, such as sulfuric acid, hydrochloric acid or other strong acid solutions, wherein the concentration of sulfuric acid can be 5% to 15%, and the concentration of hydrochloric acid can be 5% to 10%. The acid leaching time is adjusted according to different types of activated clay, and is generally controlled between 30 minutes and 3 hours. The acid solution is continuously injected into the acid mixing tank 21 through the acid supply pipeline to ensure that the acid solution is in full contact with the activated clay. During the acid leaching process, the acid solution dissolves the water-soluble impurities and metal ions in the activated clay and separates them from the activated clay. In this step, some impurities in the activated clay are removed by the acidic solution through the acid leaching process, which helps to improve the efficiency of subsequent treatment. This step can effectively remove soluble metal impurities and insoluble inorganic impurities, such as carbonates, sulfates and other substances, and improve the treatment effect of the metal extractant in the subsequent steps.

[0039] b. Screening and separation:

[0040] The activated clay after acid leaching is screened by the screening device 3 to remove large particle impurities. The screening device 3 includes a screen 31 and a vibrating device 32. The vibrating device 32 drives the screen 31 to vibrate at high frequency through a vibration motor to ensure that large particle impurities are effectively screened. The screened material is more uniform, which reduces the difficulty of material processing in subsequent steps and prevents large particle impurities from affecting the effects of magnetic separation and other post-processing links. This step removes larger particle impurities by screening to ensure that the particle size of the remaining material is suitable for subsequent magnetic separation and drying treatment, further improving the efficiency of the purification process.

[0041] c. Magnetic separation:

[0042] The screened acid-leached activated clay is mixed with a metal extractant in a certain proportion, and a mixing reaction is carried out in a mixing tank 41 to generate metal impurities. In order to remove the metal impurities, magnetic separation technology is used. A magnetic separation device 42 is set next to the mixing tank 41 to adsorb and remove the metal impurities in the mixture through electromagnetic force. The removal of metal impurities is achieved by adjusting the magnetic field strength and operation time of the magnetic separation device 42 to ensure that the impurities are fully separated. This step removes metal impurities through magnetic separation, which can effectively improve the purity of activated clay and metal extractants, avoid the influence of metal impurities on subsequent use, and help improve the recovery rate of metal extractants.

[0043] d. Post-processing:

[0044] The activated clay after magnetic separation is filtered and dried. First, the metal extractant is filtered out through the filter 53, and the filtered metal extractant can be recycled for secondary processing. Then the remaining activated clay enters the drying process. The drying equipment is heated by a hot air blower 52, and the air is sent into the drying furnace 51 by a hot air duct 54 to evaporate the residual water in the activated clay to ensure that it is completely dried, and finally obtain activated clay with high purity. The purification method can effectively remove water-soluble impurities and metal impurities in the activated clay, avoiding the defect of the traditional technology that the impurities cannot be completely removed, and at the same time can improve the recovery rate of the metal extractant, with good economic benefits and environmental protection effects.

[0045] Embodiment 2:

[0046] See also Figure 2 The present invention also provides a metal extractant activated clay purification device 1, which comprises:

[0047] 1. Preprocessing unit 2:

[0048] The pretreatment unit 2 is used to mix the activated clay with the acid solution and perform acid leaching treatment. Specifically, it includes:

[0049] Acid mixing tank 21: used to store acid solution and contain the activated clay to be treated. The acid mixing tank 21 can contain an appropriate amount of acid and activated clay to ensure that the two are fully mixed. The acid supply pipeline controls the supply of acid through a flow meter to ensure an accurate ratio of acid to activated clay.

[0050] The stirring device 22 includes a stirrer 221 and a driving motor 222 . The stirrer 221 is located in the acid solution mixing tank 21 and is rotated by the driving motor 222 to ensure sufficient contact and reaction between the acid solution and the active clay.

[0051] The acid adding device 23 includes an acid supply pipeline, a flow meter and an acid storage tank 233. The flow meter is used to accurately control the inflow of the acid to ensure that the acid is added in a predetermined proportion.

[0052] Temperature control system 24: includes a heater 241 and a temperature sensor 242. The temperature control system 24 heats the acid solution through a heating pipe 243 to ensure that the temperature of the acid solution is maintained within a reasonable range (eg, 40°C to 60°C) to improve the acid leaching efficiency.

[0053] The pretreatment unit 2 provides a good treatment environment for the subsequent removal and purification of impurities in the activated clay by precisely controlling the concentration, soaking time and temperature of the acid solution.

[0054] 2. Screening device 3:

[0055] The screening device 3 comprises a screen 31 and a vibrating device 32. The vibrating device 32 drives the screen 31 to vibrate at high frequency through a vibrating motor, thereby effectively removing large particle impurities in the activated clay after acid leaching. The screening device 3 ensures that the material entering the next processing stage is a material with uniform particles and no large particle impurities through physical screening, thereby providing a good material basis for the subsequent magnetic separation and dry filtration process.

[0056] 3. Mixed reaction unit 4:

[0057] The mixing reaction unit 4 includes a mixing tank 41 and a magnetic separation device 42. The mixing tank 41 is used to uniformly mix the activated clay after acid leaching with the metal extractant. During the mixing process, the stirring speed and mixing time of the mixing tank 41 are adjusted to ensure that the activated clay is fully in contact with the metal extractant to achieve the best purification effect. The magnetic separation device 42 is installed next to the mixing tank 41 to remove metal impurities in the mixture through electromagnetic separation technology. The magnetic field strength during the separation process can be adjusted as needed to ensure the complete removal of metal impurities and improve the purity of the metal extractant.

[0058] 4. Drying and filtering unit 5:

[0059] The drying and filtering unit 5 includes a drying furnace 51, a hot air blower 52 and a filter 53. The drying furnace 51 is arranged at the bottom of the mixing tank 41, and the filter 53 is arranged horizontally in the drying furnace 51, dividing the drying furnace 51 into two upper and lower chambers, wherein the metal extractant can sink to the lower chamber through the filter 53, and the active clay cannot pass through the filter 53 and is retained in the upper chamber. The hot air blower 52 transports the hot air to the upper chamber in the drying furnace 51 through the hot air duct 54 to ensure the complete removal of the moisture in the active clay. The metal extractant in the lower chamber can be recycled through secondary treatment. The drying and filtering unit 5 can effectively remove the residual moisture in the active clay and filter impurities, ensuring that the final product has a high purity.

[0060] The purification equipment 1 has a reasonable structural design and clear functional divisions, and can efficiently complete the purification process of activated clay. The purification equipment 1 uses a metal extractant to effectively remove impurities from the activated clay through multiple processes such as pretreatment, screening, magnetic separation, and dry filtration, thereby improving the purity of the activated clay and meeting the demand for efficient and environmentally friendly purification equipment 1 in the metal extraction industry.

[0061] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, as long as they do not deviate from the contents of the present specification or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A method for purifying activated clay as a metal extractant, characterized in that: The following steps are involved: a. Pretreatment of activated clay: Mixing the activated clay with an acid solution and performing acid leaching treatment; b. Screening and separation: After acid leaching, the activated clay is screened to remove large particles of impurities; c. Magnetic separation: Mix the screened acid-leached activated clay with a metal extractant to remove metal impurities; d. Post-treatment: filtering and drying the activated clay after magnetic separation.

2. The metal extractant activated clay purification method according to claim 1, characterized in that: The acidic solution is sulfuric acid, hydrochloric acid or other strong acid solutions.

3. The metal extractant activated clay purification method according to claim 1, characterized in that: The acid leaching time in step a is 30 minutes to 3 hours, and the acid solution is a sulfuric acid solution with a concentration of 5% to 15%. The acid concentration and immersion time are adjusted and optimized according to different types of active clay.

4. A metal extractant activated clay purification device, comprising Pretreatment unit: a device for mixing activated clay with an acid solution and performing an acid leaching treatment; Screening device: a device used to remove larger impurity particles from activated clay; Mixing reaction unit: a device used to mix the activated clay after acid leaching with the metal extractant; Drying and filtration unit: A device used to remove residual water and metal extractants from activated clay.

5. The metal extractant activated clay purification equipment according to claim 4, characterized in that: The pre-processing unit comprises Acid mixing tank: used to store acid solution and contain the activated clay to be treated; Stirring device: including a stirrer and a driving motor for driving the stirrer to rotate, the stirrer is rotatably arranged in the acid liquid mixing tank; Acid adding device: including an acid supply pipeline, a flow meter and an acid storage tank. The acid storage tank is connected to the acid mixing tank through the acid supply pipeline. The flow meter is arranged on the acid supply pipeline. Temperature control system: includes a heater, a heating pipe and a temperature sensor. The heating pipe is arranged at the periphery of the acid mixing tank and is connected to the heater. The temperature sensor is arranged at the bottom or the middle of the acid mixing tank.

6. The metal extractant activated clay purification equipment according to claim 4, characterized in that: The screening device comprises a screen and a vibrating device, and the vibrating device drives the screen to vibrate at a high frequency through a vibrating motor.

7. The metal extractant activated clay purification equipment according to claim 4, characterized in that: The mixing reaction unit comprises a mixing tank and a magnetic separation device. The mixing tank is used for mixing the active clay and the metal extractant. The magnetic separation device is installed beside the mixing tank and is used for separating metal impurities by electromagnetic.

8. The metal extractant activated clay purification equipment according to claim 4, characterized in that: The drying and filtering unit comprises a drying furnace, a hot air blower and a filter screen. The drying furnace is arranged at the bottom of the mixing tank, the filter screen is obliquely arranged in the drying furnace, and the hot air blower is connected to the drying furnace through a hot air duct.

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