An experimental device and experimental method for galvanic corrosion between grinding media and sulfide ore

Abstract

The present invention discloses an experimental device and method for galvanic corrosion between grinding media and sulfide ore, belonging to the technical field of galvanic corrosion experiments between grinding media and sulfide ore. The experimental device includes a contact reaction box, a vacuum mechanism, an atmosphere and temperature control mechanism, and a controller. A carrying mechanism is provided in the contact reaction box, and a pressure mechanism is provided in the contact reaction box directly above the carrying mechanism. The vacuum mechanism is used to evacuate the contact reaction box, and the atmosphere and temperature control mechanism is used to adjust the gas type and temperature in the contact reaction box. The controller is electrically connected to the pressure mechanism, the vacuum mechanism, the carrying mechanism, and the atmosphere and temperature control mechanism. By experimentally causing galvanic corrosion between the sulfide ore sample and the grinding medium plate, and then conducting a flotation beneficiation test on the sulfide ore sample C that has undergone galvanic corrosion, the influencing factors of the grinding process and the influence of the grinding medium on the flotation beneficiation indicators of the sulfide ore can be obtained. The experiment consumes little energy and is simple to operate.

Description

Technical Field

[0001] The invention relates to a galvanic corrosion experimental device and an experimental method for grinding media and sulfide ore, and belongs to the technical field of galvanic corrosion experiments for grinding media and sulfide ore. Background Art

[0002] Galvanic corrosion in the field of grinding research refers to the galvanic corrosion that occurs when grinding media with different electrostatic potentials come into contact with sulfide ores, or between sulfide ores with different electrostatic potentials, while simultaneously in an electrolyte solution. Because these materials with different electrostatic potentials form a galvanic cell, a redox reaction occurs at the two electrodes of the resulting galvanic cell.

[0003] Grinding is a crucial process before mineral processing. During this process, the mineral is subjected to strong mechanical forces and undergoes a series of complex redox reactions, which alter the mineral's surface properties and the chemical properties of the slurry, directly impacting the effectiveness of subsequent mineral processing steps. In actual grinding, galvanic corrosion occurs upon contact between the grinding media and the mineral. This process is influenced by complex factors, and the collision between the grinding media and sulfide ores is highly random, making it difficult to study the galvanic corrosion between the grinding media and sulfide ores.

[0004] Different grinding media used in the sulfide ore grinding process may have significantly different effects on mineral processing. Currently, the main method for studying galvanic corrosion between grinding media and sulfide ores is to use mining grinding machinery to conduct actual grinding and then conduct actual flotation beneficiation tests. This method aims to understand the factors affecting the grinding process and the influence of grinding media on sulfide ore flotation beneficiation indicators. However, these experiments are energy-intensive and complex. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a galvanic corrosion experimental device and an experimental method for grinding media and sulfide ore.

[0006] The present invention is achieved through the following technical solutions:

[0007] A grinding medium and sulfide ore galvanic corrosion experimental device includes a contact reaction box, a vacuum mechanism, an atmosphere and temperature control mechanism, and a controller. The contact reaction box is provided with a carrying mechanism, and a pressure mechanism is provided in the contact reaction box directly above the carrying mechanism. The vacuum mechanism is used to evacuate the contact reaction box, and the atmosphere and temperature control mechanism is used to adjust the gas type and temperature in the contact reaction box. The controller is electrically connected to the pressure mechanism, the vacuum mechanism, the carrying mechanism, and the atmosphere and temperature control mechanism.

[0008] One side wall of the contact reaction box is made of a transparent material, and two manual operation components are provided on the side wall. The manual operation components include a secondary vacuum box, one end of the secondary vacuum box extends into the contact reaction box, and the end is hinged with a vacuum gate valve A. The end of the secondary vacuum box away from the vacuum gate valve A is connected to the outside world, and the end is provided with a flexible sealing glove for sealing. The secondary vacuum box is connected to the vacuum mechanism through a pipeline, and a vacuum gauge B is provided on the secondary vacuum box, and the vacuum gauge B is electrically connected to the controller.

[0009] An experimental sample placement box is provided in the contact reaction box, which is connected to the vacuum mechanism through a pipeline. A slot A is provided on one side of the experimental sample placement box to communicate with the contact reaction box, and a vacuum gate valve B is hinged at the slot A. A slot B is provided on the other side of the experimental sample placement box to communicate with the outside world, and a vacuum gate valve C is hinged at the slot B. A vacuum gauge C is provided on the experimental sample placement box, and the vacuum gauge C is electrically connected to the controller.

[0010] The pressure mechanism includes an electric cylinder and an insulating pressure plate. The electric cylinder is electrically connected to the controller, and the insulating pressure plate is connected to the top of the contact reaction box through the electric cylinder.

[0011] The carrying mechanism includes a carrying seat and a sample pool. The carrying seat is arranged at the bottom of the contact reaction box. The sample pool is arranged on the carrying seat. A pressure sensor is provided at the bottom inside the sample pool, and the pressure sensor is electrically connected to the controller.

[0012] The vacuum mechanism includes a chassis A and a vacuum gauge A. A mechanical pump and a molecular pump are provided in the chassis A, and the mechanical pump and the molecular pump are respectively connected to the contact reaction box through pipelines. The vacuum gauge A is provided on the contact reaction box. The mechanical pump, molecular pump and vacuum gauge A are all electrically connected to the controller.

[0013] The atmosphere and temperature control mechanism includes a chassis B, an atmosphere adjustment component, a temperature adjustment component, a temperature sensor and an electronic pressure gauge. The atmosphere adjustment component and the temperature adjustment component are both arranged in the chassis B and are respectively connected to the contact reaction box. The temperature sensor is arranged in the contact reaction box, and the electronic pressure gauge is arranged on the contact reaction box. The temperature sensor and the electronic pressure gauge are electrically connected to the controller.

[0014] The atmosphere adjustment component includes multiple gas storage tanks, each of which is connected to the contact reaction box through a pipeline A, and each pipeline A is installed with an electric ball valve, which is electrically connected to the controller; the temperature adjustment component is an air conditioner, and the air conditioner is electrically connected to the controller.

[0015] The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore includes the following steps:

[0016] A. Preparation of sulfide ore sample: prepare the pure sulfide ore sample required for the experiment, and ultrasonically clean the pure sulfide ore sample and then air-dry it or vacuum-dry it to obtain sulfide ore sample A; take sulfide ore sample A with a mass of W and add it to a liquid with a volume of V and mix it to obtain sulfide ore sample B;

[0017] B. Preparation of the grinding medium plate to be tested: Determine the material of the grinding medium plate, prepare two grinding medium plates of the same size, and evenly polish and ultrasonically clean the surfaces of the two grinding medium plates. After drying, obtain two grinding medium plates to be tested;

[0018] C. Determine the experimental environment: evacuate the contact reaction box through the vacuum mechanism, adjust the gas type and temperature t in the contact reaction box through the atmosphere and temperature control mechanism, and maintain the gas pressure and temperature t in the contact reaction box stable;

[0019] D. Installing the sulfide ore sample and the grinding medium plate to be tested: Install and fix one of the grinding medium plates to be tested prepared in step B to the lower end of the pressure mechanism and define it as grinding medium plate A. Place the other grinding medium plate to be tested prepared in step B into the sample pool of the supporting mechanism and define it as grinding medium plate B. Then, evenly cover the sulfide ore sample A or sulfide ore sample B prepared in step A on the grinding medium plate B.

[0020] E. Determine the experimental pressure: According to the experimental requirements, the controller sets the pressure F applied by the pressure mechanism to the support mechanism and the pressure action time T;

[0021] F. Conducting a galvanic corrosion experiment: The pressure mechanism drives the grinding medium plate A downward into the sample pool. The grinding medium plate A acts on the sulfide ore sample A or the sulfide ore sample B on the grinding medium plate B at the pressure F set in step E and maintains this pressure for a time T. The sulfide ore sample A or the sulfide ore sample B fully contacts the grinding medium plate A and the grinding medium plate B, and galvanic corrosion occurs, thereby obtaining a sulfide ore sample C.

[0022] G. Preparing different sulfide ore samples C: adjusting one of the factors affecting the grinding process, the factors affecting the grinding process including the particle size of the sulfide ore pure mineral sample in step A, the type of liquid in step A, the volume V of the liquid in step A, the material of the grinding medium plate in step B, the bottom area of ​​the grinding medium plate in step B, the type of gas in the contact reaction box in step C, the temperature t in the contact reaction box in step C, the pressure F in step E, and the pressure action time T in step E, and then repeating steps A to G to prepare different sulfide ore samples C;

[0023] H. Perform flotation tests and characterization tests on the sulfide ore sample C in step G to obtain the influence of the grinding process influencing factors on the flotation and beneficiation indicators of the sulfide ore.

[0024] In step A, the particle size of the pure mineral sample of the sulfide ore is in the range of -200 mesh to 300 mesh, and the liquid is deionized water or a reagent;

[0025] In step C, the mechanical pump is first started to increase the vacuum degree in the contact reaction box to below 10Pa, and then the molecular pump is started to increase the vacuum degree in the contact reaction box to 10Pa by the mechanical pump and the molecular pump. -5 Pa order of magnitude;

[0026] In step C, the pressure in the contact reaction box is adjusted to be the same as the atmospheric pressure by the atmosphere and temperature control mechanism;

[0027] In step D, the experimenter installs the sulfide ore sample and the grinding medium plate to be tested through flexible sealing gloves.

[0028] The beneficial effects of the present invention are:

[0029] 1. Through the experiment, galvanic corrosion occurs between the sulfide ore sample and the grinding medium plate, and then the flotation beneficiation test is carried out on the sulfide ore sample C that has completed the galvanic corrosion. The influencing factors of the grinding process and the influence of the grinding medium on the flotation beneficiation indicators of the sulfide ore can be obtained. The experiment requires a small amount of sulfide ore sample, consumes little energy, and is simple to operate.

[0030] 2. One of the factors affecting the grinding process, such as the particle size of the pure mineral sample of sulfide ore, the type of liquid, the liquid volume V (i.e., the water content of the slurry), the material of the grinding medium plate, the contact area between the grinding medium plate and the sulfide ore sample, the type of gas in the contact reaction box, the temperature t in the contact reaction box, the pressure F, and the pressure action time T, can be used as a single variable to study the influence of the galvanic corrosion between the grinding medium and the target sulfide mineral on the floatability of the target sulfide mineral, which is beneficial to improve the flotation beneficiation effect of the target sulfide mineral.

[0031] 3. The experimental device has the advantages of fine variable control, reasonable device design, and easy operation; the experimental operation is convenient and simple, the experimental process produces little metal pollution, the experimental energy consumption is greatly reduced, the experimental influence rules are intuitive and clear, and the experimental mechanism exploration is more in-depth; it has broad application prospects in the research and development of new grinding media materials and the research on galvanic corrosion in sulfide ore flotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the present invention after the vacuum gauge A and the electronic pressure gauge are removed;

[0033] Figure 2 This is a schematic diagram of the internal structure of the present invention after the controller is removed;

[0034] Figure 3 Schematic diagram of the assembly structure of the insulating pressure plate and the grinding medium plate A of the present invention;

[0035] Figure 4 Schematic diagram of the assembly structure of the sample cell, grinding medium plate B and pressure sensor of the present invention;

[0036] Figure 5 This is a schematic diagram of the assembly structure of the contact reaction box, manual operation component and experimental sample placement box of the present invention;

[0037] Figure 6 It is a structural schematic diagram of the experimental sample placement box of the present invention;

[0038] Figure 7 (a) is the XPS spectrum of the S2p orbital of the sulfide ore sample A in the control group when there is no galvanic corrosion between the grinding medium and the sulfide ore; (b) is the XPS spectrum of the S 2p orbital of the obtained sulfide ore sample C;

[0039] Figure 8 The open circuit potential diagram (a), cyclic voltammetry curve (b), and Tafel curve result diagram (c) of the electrochemical test to determine whether galvanic corrosion between the grinding medium and the sulfide ore occurs.

[0040] In the figure: 1-contact reaction box, 2-pressure-applying mechanism, 20-electric cylinder, 21-insulating pressure plate, 22-grinding medium plate A, 3-vacuum mechanism, 30-chassis A, 31-mechanical pump, 32-molecular pump, 33-vacuum gauge A, 4-controller, 5-carrying mechanism, 50-carrying seat, 51-sample cell, 511-grinding medium plate B, 512-pressure sensor, 6-atmosphere and temperature control mechanism, 60-chassis B, 61-atmosphere adjustment component, 62-temperature adjustment component, 63-temperature sensor, 64-electronic pressure gauge, 7-manual operation component, 70-auxiliary vacuum box, 71-vacuum gate valve A, 72-flexible sealing gloves, 73-vacuum gauge B, 8-experimental sample placement box, 80-vacuum gate valve B, 81-vacuum gauge C, 82-vacuum gate valve C. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0042] like Figures 1 to 6As shown, the galvanic corrosion experimental device of grinding media and sulfide ore described in the present invention includes a contact reaction box 1, a vacuum mechanism 3, an atmosphere and temperature control mechanism 6 and a controller 4. A supporting mechanism 5 is installed in the contact reaction box 1, and a pressure mechanism 2 is installed in the contact reaction box 1 just above the supporting mechanism 5. The vacuum mechanism 3 is used to vacuum the contact reaction box 1, and the atmosphere and temperature control mechanism 6 is used to adjust the gas type and temperature in the contact reaction box 1. The controller 4 is electrically connected to the pressure mechanism 2, the vacuum mechanism 3, the supporting mechanism 5 and the atmosphere and temperature control mechanism 6. During use, the device is controlled as a whole by the controller 4, the contact reaction box 1 is vacuumed by the vacuum mechanism 3, the gas type and temperature in the contact reaction box 1 are adjusted by the atmosphere and temperature control mechanism 6, one of the grinding medium plates and the sulfide ore sample is carried by the carrying mechanism 5, the other grinding medium plate is pushed down to contact the sulfide ore sample by the pressure mechanism 2, and the sulfide ore sample is kept in contact with the two grinding medium plates for a certain period of time under a certain pressure. The sulfide ore sample undergoes galvanic corrosion in the process of contact with the two grinding medium plates, and then a flotation beneficiation test is carried out on the sulfide ore sample that has completed the galvanic corrosion, so as to obtain the influencing factors of the grinding process and the influence of the grinding medium on the flotation beneficiation indicators of the sulfide ore. The experiment requires a small number of sulfide ore samples, consumes little energy, and is simple to operate.

[0043] A side wall of the contact reaction box 1 is made of a transparent material, and two manual operation components 7 are installed on the side wall. The manual operation component 7 includes a secondary vacuum box 70. The secondary vacuum box 70 has an opening at one end extending into the contact reaction box 1, and a vacuum gate valve A71 is hinged on this end. The end of the secondary vacuum box 70 away from the vacuum gate valve A71 is connected to the outside world, and a flexible sealing glove 72 is installed on this end for sealing. The secondary vacuum box 70 is connected to the vacuum mechanism 3 through a pipeline. A vacuum gauge B73 is installed on the secondary vacuum box 70, and the vacuum gauge B73 is electrically connected to the controller 4. When in use, the side wall of the contact reaction box 1 is made of a transparent material, which facilitates observation of the situation inside the contact reaction box 1 and facilitates the experimenter wearing the flexible sealing glove 72 to install the sulfide ore sample and the grinding medium plate to be tested. The auxiliary vacuum box 70 is connected to the mechanical pump 31 and the molecular pump 32 through pipelines respectively, and an electric ball valve is installed on each pipeline. Each electric ball valve is electrically connected to the controller 4. The vacuum gauge B73 is used to detect the vacuum degree in the auxiliary vacuum box 70.

[0044] The contact reaction box 1 is equipped with an experimental sample storage box 8, which is connected to the vacuum mechanism 3 via a pipeline. A slot A is provided on one side of the experimental sample storage box 8 for communication with the contact reaction box 1, and a vacuum gate valve B80 is hingedly connected to the slot A. A slot B is provided on the other side of the experimental sample storage box 8 for communication with the outside world, and a vacuum gate valve C82 is hingedly connected to the slot B. A vacuum gauge C81 is installed on the experimental sample storage box 8, and the vacuum gauge C81 is electrically connected to the controller 4. During use, the experimental sample storage box 8 is connected to the mechanical pump 31 and the molecular pump 32 via pipelines, and each pipeline is equipped with an electric ball valve, each of which is electrically connected to the controller 4. The vacuum gauge C81 is used to detect the vacuum level in the experimental sample storage box 8. After preparing the sulfide ore sample and the grinding medium plate to be tested, open the vacuum gate valve C82 and place them in the experimental sample placement box 8, and then close the vacuum gate valve C82. During the experiment, the experimenter can open the vacuum gate valve B80 after wearing the flexible sealing gloves 72, and take out the sulfide ore sample and the grinding medium plate to be tested in the experimental sample placement box 8 for experiment. It can be seen that the experimental sample placement box 8 serves as a bridge to communicate with the outside world and the contact reaction box 1. It can be seen that in the process of placing the external sulfide ore sample and the grinding medium plate to be tested in the contact reaction box 1, it can prevent the external environment from affecting the gas type, temperature and vacuum degree inside the contact reaction box 1.

[0045] The pressure mechanism 2 includes an electric cylinder 20 and an insulating pressure plate 21 . The electric cylinder 20 is electrically connected to the controller 4 , and the insulating pressure plate 21 is connected to the top of the contact reaction box 1 through the electric cylinder 20 .

[0046] The supporting mechanism 5 includes a supporting seat 50 and a sample pool 51. The supporting seat 50 is installed at the bottom of the contact reaction box 1. The sample pool 51 is installed on the supporting seat 50. A pressure sensor 512 is installed at the bottom of the inner side of the sample pool 51, and the pressure sensor 512 is electrically connected to the controller 4.

[0047] The vacuum mechanism 3 includes a chassis A30 and a vacuum gauge A33. A mechanical pump 31 and a molecular pump 32 are installed within chassis A30. Mechanical pump 31 and molecular pump 32 are connected to the contact reaction box 1 via pipes. The vacuum gauge A33 is mounted on the contact reaction box 1. The mechanical pump 31, molecular pump 32, and vacuum gauge A33 are all electrically connected to a controller 4. During use, the mechanical pump 31 and molecular pump 32 are used to evacuate the contact reaction box 1, the auxiliary vacuum box 70, and the experimental sample storage box 8. The vacuum gauge A33 is used to detect the vacuum level within the experimental sample storage box 8.

[0048] The atmosphere and temperature control mechanism 6 includes a chassis B60, an atmosphere adjustment component 61, a temperature adjustment component 62, a temperature sensor 63 and an electronic barometer 64. The atmosphere adjustment component 61 and the temperature adjustment component 62 are both installed in the chassis B60 and are respectively connected to the contact reaction box 1. The temperature sensor 63 is installed in the contact reaction box 1, and the electronic barometer 64 is installed on the contact reaction box 1. The temperature sensor 63 and the electronic barometer 64 are electrically connected to the controller 4.

[0049] The atmosphere adjustment assembly 61 includes multiple gas tanks, each connected to the contact reaction box 1 via a pipe A. Each pipe A is equipped with an electric ball valve, which is electrically connected to the controller 4. The temperature adjustment assembly 62 is an air conditioner, which is also electrically connected to the controller 4. During use, each gas tank stores different types of gas. For example, some tanks store compressed air, while others store nitrogen. The specific type of gas tank to be placed in the chassis B60 is determined based on experimental needs. The gas in the gas tank is used to fill the contact reaction box 1. The electronic barometer 64 is used to detect the air pressure in the contact reaction box 1. When the air pressure in the contact reaction box 1 is equal to the external atmospheric pressure, the controller 4 closes the electric ball valve on the pipe connecting the gas tank to the contact reaction box 1, and the gas tank stops charging the contact reaction box 1. The air conditioner is used to regulate the temperature in the contact reaction box 1. The temperature sensor 63 is used to detect the temperature in the contact reaction box 1.

[0050] The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore includes the following steps:

[0051] A. Preparation of sulfide ore sample: prepare the pure sulfide ore sample required for the experiment, and ultrasonically clean the pure sulfide ore sample and then air-dry it or vacuum-dry it to obtain sulfide ore sample A; take sulfide ore sample A with a mass of W and add it to a liquid with a volume of V and mix it to obtain sulfide ore sample B;

[0052] B. Prepare the grinding medium plate to be tested: Determine the material of the grinding medium plate, prepare two grinding medium plates of the same size, and evenly polish and ultrasonically clean the surfaces of the two grinding medium plates. After drying, obtain two grinding medium plates to be tested. When in use, the grinding medium plate is a rectangular plate, and its length and width dimensions match the dimensions of the matching sample cell 51.

[0053] C. Determine the experimental environment: evacuate the contact reaction box 1 through the vacuum mechanism 3, adjust the gas type and temperature t in the contact reaction box 1 through the atmosphere and temperature control mechanism 6, and maintain the gas pressure and temperature t in the contact reaction box 1 stable;

[0054] D. Installing the sulfide ore sample and the grinding medium plate to be tested: Install and fix one of the grinding medium plates to be tested prepared in step B to the lower end of the pressure mechanism 2 and define it as grinding medium plate A22. Place the other grinding medium plate to be tested prepared in step B into the sample pool 51 of the supporting mechanism 5 and define it as grinding medium plate B511. Then, evenly cover the sulfide ore sample A or sulfide ore sample B prepared in step A on the grinding medium plate B511.

[0055] E. Determine the experimental pressure: According to the experimental requirements, the controller 4 sets the pressure F applied by the pressure-applying mechanism 2 to the supporting mechanism 5 and the pressure action time T;

[0056] F. Conducting a galvanic corrosion experiment: The pressure mechanism 2 drives the grinding medium plate A22 downward into the sample pool 51. The grinding medium plate A22 acts on the sulfide ore sample A or the sulfide ore sample B on the grinding medium plate B511 at the pressure F set in step E and maintains the pressure for a time T. The sulfide ore sample A or the sulfide ore sample B fully contacts the grinding medium plate A22 and the grinding medium plate B511, and galvanic corrosion occurs, thereby producing a sulfide ore sample C.

[0057] G. Preparing different sulfide ore samples C: adjusting one of the factors influencing the grinding process, the factors influencing the grinding process including the particle size of the sulfide ore pure mineral sample in step A, the type of liquid in step A, the volume V of the liquid in step A, the material of the grinding medium plate in step B, the bottom area of ​​the grinding medium plate in step B, the type of gas in the contact reaction box 1 in step C, the temperature t in the contact reaction box 1 in step C, the pressure F in step E, and the pressure action time T in step E, and then repeating steps A to G to prepare different sulfide ore samples C;

[0058] H. Perform flotation tests and characterization tests on the sulfide ore sample C in step G to determine the influence of grinding process factors on the flotation and beneficiation indicators of the sulfide ore. The obtained sulfide ore sample C can be tested using an electrochemical workstation to determine its open circuit potential, cyclic voltammetry curve, and Tafel curve, thereby revealing the influence of galvanic corrosion between the grinding media and the sulfide ore on the electrochemical properties of the sulfide ore sample C.

[0059] For the obtained sulfide ore sample C, the surface elemental chemical state and other analyses can be performed through X-ray photoelectron spectroscopy characterization to obtain the type, quantity and distribution of galvanic corrosion products on the sulfide ore surface, thereby revealing the mechanism of galvanic corrosion between grinding media and sulfide ore.

[0060] For the obtained sulfide ore sample C, ion chromatography can be used to determine the content of oxygen-containing sulfides on its surface, and high-performance liquid chromatography can be used to determine the content of elemental sulfur on its surface, thereby obtaining the existence form and content of sulfur on the surface of the sulfide ore sample, thereby gaining a deep understanding of the influence of the galvanic corrosion between grinding media and sulfide ore on the existence form and content of sulfur on the surface of sulfide ore, and further revealing the mechanism of galvanic corrosion between grinding media and sulfide ore.

[0061] In step A, the particle size of the pure mineral sample of the sulfide ore is in the range of -200 mesh to 300 mesh, and the liquid is deionized water or a reagent;

[0062] In step C, the mechanical pump 31 is first started to increase the vacuum degree in the contact reaction box 1 to below 10 Pa, and then the molecular pump 32 is started. The mechanical pump 31 and the molecular pump 32 are used together to increase the vacuum degree in the contact reaction box 1 to 10 Pa. -5 Pa order of magnitude;

[0063] In step C, the atmosphere and temperature control mechanism 6 is used to adjust the pressure in the contact reaction box 1 to be the same as the atmospheric pressure;

[0064] In step D, the experimenter wears flexible sealing gloves 72 to install the sulfide ore sample and the grinding medium plate to be tested.

[0065] The experimental device and method for galvanic corrosion between grinding media and sulfide ore described in the present invention have the following technical effects:

[0066] 1. Through the experiment, galvanic corrosion occurs between the sulfide ore sample and the grinding medium plate, and then the flotation beneficiation test is carried out on the sulfide ore sample C that has completed the galvanic corrosion. The influencing factors of the grinding process and the influence of the grinding medium on the flotation beneficiation indicators of the sulfide ore can be obtained. The experiment requires a small amount of sulfide ore sample, consumes little energy, and is simple to operate.

[0067] 2. One of the factors affecting the grinding process, such as the particle size of the pure mineral sample of sulfide ore, the type of liquid, the liquid volume V (i.e., the water content of the slurry), the material of the grinding medium plate, the contact area between the grinding medium plate and the sulfide ore sample, the type of gas in the contact reaction box 1, the temperature t in the contact reaction box 1, the pressure F, and the pressure action time T, can be used as a single variable to study the influence of the galvanic corrosion between the grinding medium and the target sulfide mineral on the floatability of the target sulfide mineral, which is beneficial to improve the flotation and beneficiation effect of the target sulfide mineral.

[0068] 3. The experimental device has the advantages of fine variable control, reasonable device design, and easy operation; the experimental operation is convenient and simple, the experimental process produces little metal pollution, the experimental energy consumption is greatly reduced, the experimental influence rules are intuitive and clear, and the experimental mechanism exploration is more in-depth; it has broad application prospects in the research and development of new grinding media materials and the research on galvanic corrosion in sulfide ore flotation.

[0069] Specifically, an electrochemical workstation or other testing and analysis equipment can be added to the contact reaction box 1 to characterize the galvanic corrosion process in the galvanic corrosion reaction area between the insulating pressure plate 21 and the sample pool 51 in real time, so as to more quickly and scientifically obtain the effects of different reaction conditions on the galvanic corrosion of the grinding medium and the sulfide ore. Alternatively, a small flotation machine or other mineral processing equipment can be added to the contact reaction box 1 to conduct a flotation test on the sulfide ore sample C. The flotation recovery rate or other flotation indicators can be used to macroscopically obtain the influence of different influencing conditions on the floatability of the sulfide ore, and the galvanic corrosion mechanism of the grinding medium and the sulfide ore can be studied in combination with more analytical tests.

[0070] Example 1:

[0071] The galvanic corrosion between grinding media and sulfide ore was studied in two different gas environments: air and nitrogen.

[0072] 1. First, prepare the sulfide ore mineral sample required for the experiment, with a particle size of -200 to 300 mesh. The pure sulfide ore mineral sample is ultrasonically cleaned and naturally air-dried, and is called sulfide ore sample A; take 1 gram of sulfide ore sample A, add 0.5 mL of deionized water and mix well to obtain sulfide ore sample B; then prepare the grinding medium sample, select two square grinding medium plates with a side length of 10 cm, the grinding medium plates are made of DT4 pure iron, and their surfaces are uniformly polished and ultrasonically cleaned, and wiped dry to obtain the grinding medium plates to be tested, and select a sample cell 51 with a size matching the size of the grinding medium plates to be tested; the grinding medium plate to be tested placed in the sample cell 51 is called grinding medium plate A22; the grinding medium plate to be tested fixed to the bottom of the insulating pressure plate 21 is called grinding medium plate B511.

[0073] 2. The atmosphere and temperature control mechanism 6 is used to adjust the atmosphere in the contact reaction chamber 1 to air and the temperature in the contact reaction chamber 1 to 20 degrees Celsius. Sample manipulation is performed using flexible sealing gloves 72. First, the grinding medium plate A22 is placed in the sample cell 51. Then, the sulfide ore sample A or the sulfide ore sample B is evenly covered on the grinding medium plate A22. The electric cylinder drives the insulating pressing plate 21 to press the grinding medium plate B511 into the sample cell 51. The pressure F is set to 60N. The sulfide ore sample to be tested is in full contact with both the grinding medium plate A22 and the grinding medium plate B511. The test is timed for 20 minutes to allow galvanic corrosion to occur under the set environmental conditions. The sulfide ore sample C is obtained after the galvanic corrosion reaction between the grinding medium and the sulfide ore.

[0074] 3. Repeat the experiment in step 2 three times, and use the obtained sulfide ore sample C for flotation test and characterization test each time to obtain flotation indicators and test data such as recovery rate. In order to obtain the change of S atomic valence state on the sulfide ore surface after galvanic corrosion between grinding medium and sulfide ore, it is necessary to perform peak fitting on the XPS spectrum of S 2p orbital and the relative content of sulfur atoms with different valence states. X-ray photoelectron spectroscopy test was performed on the sulfide ore sample A of the control group where galvanic corrosion between grinding medium and sulfide ore did not occur, and the corresponding XPS spectrum was obtained as shown in the figure below. Figure 7 (a) is shown, and the relative content distribution of different valence states of sulfur atoms is shown in Table 1. When the sulfide ore sample is chalcopyrite, 1 gram of pure chalcopyrite mineral sample is taken, 0.5 ml of deionized water is added and mixed evenly at room temperature and air conditions, and a pressure of 60 Newtons is applied for 20 minutes. The XPS spectrum of the sulfide ore sample C is as follows: Figure 7 (b) shows the relative content distribution of sulfur atoms in different valence states as shown in Table 1. By comparing the XPS energy spectrum of S 2p orbitals and the relative content of S atomic valence states before and after galvanic corrosion between grinding media and sulfide ore, the mechanism of galvanic corrosion between grinding media and sulfide ore was further studied.

[0075] 4. Turn on the vacuum mechanism 3 to place the contact reaction box 1 in a high vacuum state. Use the atmosphere and temperature control mechanism 6 to adjust the gas in the contact reaction box 1 to nitrogen and the temperature in the contact reaction box 1 to 20 degrees Celsius. Perform sample manipulation using the flexible sealing glove 72. First, place the grinding medium plate A22 into the sample cell 51. Then, evenly cover the sulfide ore sample A or sulfide ore sample B on the grinding medium plate A22. The electric cylinder drives the insulating pressing plate 21 to press the grinding medium plate B511 into the sample cell 51. The pressure F is set to 60N. The sulfide ore sample to be tested is in full contact with both the grinding medium plate A22 and the grinding medium plate B511. The test is timed for 20 minutes to allow galvanic corrosion to occur between them under the set environmental conditions. The sulfide ore sample C is obtained after the galvanic corrosion reaction between the grinding medium and the sulfide ore.

[0076] 5. Repeat step 4 three times, and use the obtained sulfide ore sample C to perform flotation test and characterization test each time to obtain flotation indicators and test data such as recovery rate.

[0077] 6. Combining experimental data with test data, we can analyze the effect of galvanic corrosion between DT4 pure iron and sulfide ore flotation on the floatability of target sulfide minerals under two gas types, determine whether the grinding media material has an enhancing effect on the floatability of target sulfide minerals under the gas conditions, and study the galvanic corrosion mechanism between grinding media and sulfide ore.

[0078] Table 1. S atomic concentration on the surface of chalcopyrite samples, whether galvanic corrosion between grinding media and sulfide ore occurs

[0079]

[0080] Example 2:

[0081] The galvanic corrosion between grinding media and sulfide ore was studied under different pressure values.

[0082] 1. First, prepare the sulfide ore mineral sample required for the experiment, with a particle size of -200 to 300 mesh. This experiment uses a pure chalcopyrite mineral sample that has been ultrasonically cleaned and naturally air-dried, and is called sulfide ore sample A; take 1 gram of sulfide ore sample A, add 0.3 mL of deionized water and mix evenly to obtain sulfide ore sample B; then prepare the grinding medium sample, select two square grinding medium plates with a side length of 10 cm, and the grinding medium plates are made of DT4 pure iron. The surface is evenly polished and ultrasonically cleaned, and wiped dry to obtain the grinding medium plates to be tested, and select a sample cell 51 with a size that matches the size of the grinding medium plates to be tested; the grinding medium plate to be tested placed in the sample cell 51 is called grinding medium plate A22; the grinding medium plate to be tested fixed to the bottom of the insulating pressure plate 21 is called grinding medium plate B511.

[0083] 2. Turn on the vacuum mechanism 3 to place the contact reaction chamber 1 in a high vacuum state. Use the atmosphere and temperature control mechanism 6 to adjust the gas in the contact reaction chamber 1 to air and the temperature in the contact reaction chamber 1 to 20 degrees Celsius. Perform sample manipulation using the flexible sealing glove 72. First, place the grinding medium plate A22 into the sample cell 51. Then, evenly cover the sulfide ore sample A or sulfide ore sample B on the grinding medium plate A22. The electric cylinder drives the insulating pressing plate 21 to press the grinding medium plate B511 into the sample cell 51. The sulfide ore sample to be tested is in full contact with both the grinding medium plate A22 and the grinding medium plate B511. The test is timed for 10 minutes to allow galvanic corrosion to occur between the grinding medium and the sulfide ore under the set environmental conditions. This yields the sulfide ore sample C after the galvanic corrosion reaction between the grinding medium and the sulfide ore.

[0084] 3. When the electric cylinder in experimental step 2 applies pressure, the set pressure F is 0N, 60N, and 100N respectively. Step 2 is repeated three times at each pressure value. Each time, the obtained sulfide ore sample C is used for flotation experiment and characterization test to obtain flotation indicators and test data such as recovery rate. The flotation index recovery rate is shown in Table 2. Analysis shows that when the pressure is relatively small such as 0N, 60N, and 100N during the grinding process, the galvanic corrosion between the grinding medium and the sulfide ore has a significant effect on the floatability of the sulfide ore.

[0085] 4. Combining the experimental data and test data of repeated experiments at different pressure values, we can analyze the effect of galvanic corrosion between DT4 pure iron and sulfide ore on the floatability of target sulfide minerals under different pressure conditions, determine whether the grinding medium material has an enhancing effect on the floatability of target sulfide minerals under different pressure conditions, and study the galvanic corrosion mechanism between grinding media and sulfide ore.

[0086] Table 2. Effect of grinding pressure on chalcopyrite flotation recovery

[0087]

[0088] Example 3:

[0089] The galvanic corrosion between grinding media and sulfide ore was studied under two different conditions: deionized water and xanthate solution.

[0090] 1. First, prepare the sulfide ore mineral sample required for the experiment, with a particle size of -200 to 300 mesh. The pure sulfide ore mineral sample is ultrasonically cleaned and then naturally air-dried, which is called sulfide ore sample A.

[0091] 2. Take 1 gram of sulfide ore sample A and add 0.5 milliliters of deionized water to mix thoroughly to obtain sulfide ore sample B. Then, prepare the grinding medium sample. Select two 10-centimeter square grinding medium plates made of DT4 pure iron. Evenly polish and ultrasonically clean their surfaces, then wipe dry to obtain the grinding medium plates to be tested. Select a sample cell 51 of a size that matches the grinding medium plates to be tested. The grinding medium plates to be tested placed in the sample cell 51 are referred to as grinding medium plates A22. The grinding medium plates to be tested, secured to the bottom of the insulating pressure plate 21, are referred to as grinding medium plates B511. Turn on the vacuum mechanism 3 to place the contact reaction chamber 1 in a high vacuum state. Use the atmosphere and temperature control mechanism 6 to regulate the atmosphere in the contact reaction chamber 1 to nitrogen and the temperature to 25 degrees Celsius. Sample operation is performed through flexible sealing gloves 72. First, the grinding medium plate A22 is placed in the sample pool 51. Then, the sulfide ore sample A or the sulfide ore sample B is evenly covered on the grinding medium plate A22. The electric cylinder drives the insulating pressure plate 21 to press the grinding medium plate B511 into the sample pool 51. The pressure F is 60N. The sulfide ore sample to be tested is in full contact with the grinding medium plate A22 and the grinding medium plate B511 at the same time. The time is set for 20 minutes to allow them to undergo galvanic corrosion under the set environmental conditions, and the sulfide ore sample C after the galvanic corrosion reaction between the grinding medium and the sulfide ore is obtained.

[0092] 3. Take 1 gram of sulfide ore sample A and add 0.5 ml of 1*10 -4mol / L xanthate solution was mixed to obtain sulfide ore sample B. Then, a grinding medium sample was prepared by selecting two 10 cm square grinding medium plates made of DT4 pure iron. Their surfaces were evenly polished and ultrasonically cleaned, then wiped dry to obtain the grinding medium plates to be tested. A sample cell 51 of a size matching the size of the grinding medium plates to be tested was selected. The grinding medium plate to be tested placed in sample cell 51 is referred to as grinding medium plate A22; the grinding medium plate to be tested, secured to the bottom of insulating pressure plate 21, is referred to as grinding medium plate B511. The vacuum mechanism 3 was activated to place the contact reaction chamber 1 in a high vacuum state. The atmosphere and temperature control mechanism 6 was used to adjust the gas in the contact reaction chamber 1 to nitrogen and the temperature in the contact reaction chamber 1 to 25°C. Sample operation is performed through flexible sealing gloves 72. First, the grinding medium plate A22 is placed in the sample pool 51. Then, the sulfide ore sample A or the sulfide ore sample B is evenly covered on the grinding medium plate A22. The electric cylinder drives the insulating pressure plate 21 to press the grinding medium plate B511 into the sample pool 51. The pressure F is 60N. The sulfide ore sample to be tested is in full contact with the grinding medium plate A22 and the grinding medium plate B511 at the same time. The time is set for 20 minutes to allow them to undergo galvanic corrosion under the set environmental conditions, and the sulfide ore sample C after the galvanic corrosion reaction between the grinding medium and the sulfide ore is obtained.

[0093] 4. Repeat step 2 for three times, and use the obtained sulfide ore sample C for flotation experiments and characterization tests each time to obtain flotation indicators and test data such as recovery rate. For the obtained sulfide ore sample C, the open circuit potential, cyclic voltammetry curve and Tafel curve of the sulfide ore sample C can be tested using an electrochemical workstation to reveal the influence of the galvanic corrosion between the grinding medium and the sulfide ore on the electrochemical properties of the sulfide ore sample C. When the sulfide ore sample is a chalcopyrite sample, an electrochemical test is performed to obtain the open circuit potential, cyclic voltammetry curve and Tafel curve of whether galvanic corrosion between the grinding medium and the sulfide ore occurs. Figure 8 (a) shows that the open circuit potential, cyclic voltammetry curve and Tafel curve before and after the galvanic corrosion between the grinding medium and the sulfide ore are compared to study the mechanism of galvanic corrosion between the grinding medium and the sulfide ore from an electrochemical perspective.

[0094] 5. Repeat step 3 for three times, and use the obtained sulfide ore sample C to perform flotation experiments and characterization tests each time to obtain flotation indicators and test data such as recovery rate.

[0095] 6. Combine the experimental data and test data obtained in steps 4 and 5 to study the galvanic corrosion mechanism between the grinding medium and the sulfide ore, and determine whether the grinding medium material has an enhancing effect on the floatability of the target sulfide mineral.

[0096] 7. Combining the experimental data and test data obtained in steps 4 and 5, we can analyze the effect of galvanic corrosion between DT4 pure iron and sulfide ore on the floatability of target sulfide minerals under the influence of xanthate solution, determine whether the grinding medium material has an enhancing effect on the floatability of target sulfide minerals under different reagent solution conditions, and study the galvanic corrosion mechanism between grinding media and sulfide ore.

[0097] Example 4:

[0098] The galvanic corrosion between grinding media and chalcopyrite was studied under the influence of different water contents in sulfide ore slurry.

[0099] First, prepare the chalcopyrite mineral sample required for the experiment. Its particle size is -200-300 mesh. The pure chalcopyrite mineral sample is ultrasonically cleaned and air-dried, referred to as chalcopyrite sample A. Take 1 gram of chalcopyrite sample A and add a volume V of deionized water to mix thoroughly, obtaining chalcopyrite sample B. Next, prepare the grinding medium sample. Select two square grinding medium plates with a side length of 10 cm. Made of DT4 pure iron, their surfaces are evenly polished, ultrasonically cleaned, and wiped dry to obtain the grinding medium plates to be tested. A sample cell 51 of matching dimensions is selected. The grinding medium plates to be tested placed in the sample cell 51 are referred to as grinding medium plates A22. The grinding medium plates to be tested, secured to the bottom of the insulating pressure plate 21, are referred to as grinding medium plates B511. The vacuum mechanism 3 is activated, placing the contact reaction chamber 1 in a high vacuum state. The atmosphere and temperature control mechanism 6 are used to maintain the contact reaction chamber 1 at air and a temperature of 20°C. Sample manipulation is performed using flexible sealing gloves 72. First, the grinding medium plate A22 is placed in the sample pool 51. Then, the chalcopyrite sample A or the chalcopyrite sample B is evenly covered on the grinding medium plate A22. The electric cylinder drives the insulating pressing plate 21 to press the grinding medium plate B511 into the sample pool 51. The pressure F is 30N. The chalcopyrite sample to be tested is in full contact with the grinding medium plate A22 and the grinding medium plate B511 at the same time. The test is timed for 10 minutes to allow galvanic corrosion to occur between them under the set environmental conditions, thereby obtaining the chalcopyrite sample C after the galvanic corrosion reaction between the grinding medium and the chalcopyrite.

[0100] 2. In experimental step 1, chalcopyrite sample A was added to deionized water with a volume of V and mixed to obtain chalcopyrite sample B; the volume V was 0 mL, 0.25 mL, 0.5 mL, and 1 mL respectively; step 1 was repeated three times under each water content condition, and chalcopyrite sample C was obtained each time for flotation experiment and characterization test, and flotation indicators and test data such as recovery rate were obtained. The flotation index recovery rate is shown in Table 3. Analysis shows that within a certain water content range, the adverse effect of DT4 pure iron grinding medium on the floatability of sulfide ore (chalcopyrite) gradually increases with the increase of water content during the grinding process. This may be because the water content causes the enhanced galvanic corrosion between the grinding medium and the sulfide ore.

[0101] 3. Combining the experimental data and test data under different water content conditions, the galvanic corrosion mechanism between grinding media and chalcopyrite is studied to determine whether the grinding media material has an enhancing effect on the floatability of the target chalcopyrite mineral.

[0102] 4. Combining the experimental data and test data under different water content conditions, we can analyze the effect of galvanic corrosion between DT4 pure iron and chalcopyrite on the floatability of target chalcopyrite under the influence of slurry water content, determine whether the grinding medium material has an enhancing effect on the floatability of target chalcopyrite under the influence of different slurry water content, and study the galvanic corrosion mechanism between grinding media and chalcopyrite.

[0103] Table 3. Effect of slurry moisture content in the grinding process on chalcopyrite flotation recovery

[0104]

[0105] Embodiment 5:

[0106] The galvanic corrosion between grinding media and sulfide ore was studied under different pressure action times.

[0107] 1. First, prepare the sulfide ore mineral sample required for the experiment, with a particle size of -200 to 300 mesh. This experiment uses a pure chalcopyrite mineral sample that has been ultrasonically cleaned and naturally air-dried, and is called sulfide ore sample A; take 1 gram of sulfide ore sample A, add 0.5 mL of deionized water and mix well to obtain sulfide ore sample B; then prepare the grinding medium sample, select two square grinding medium plates with a side length of 10 cm, made of DT4 pure iron, and their surfaces are evenly polished and ultrasonically cleaned. After wiping dry, the grinding medium plates to be tested are obtained, and a sample cell 51 with a size matching the size of the grinding medium plates to be tested is selected; the grinding medium plate to be tested placed in the sample cell 51 is called grinding medium plate A22; the grinding medium plate to be tested fixed to the bottom of the insulating pressure plate 21 is called grinding medium plate B511.

[0108] 2. Turn on the vacuum mechanism 3 to place the contact reaction box 1 in a high vacuum state. Use the atmosphere and temperature control mechanism 6 to adjust the gas in the contact reaction box 1 to air and the temperature in the contact reaction box 1 to 20 degrees Celsius. Perform sample manipulation using the flexible sealing glove 72. First, place the grinding medium plate A22 into the sample cell 51. Then, evenly cover the sulfide ore sample A or sulfide ore sample B on the grinding medium plate A22. The electric cylinder drives the insulating pressing plate 21 to press the grinding medium plate B511 into the sample cell 51. The pressure F is set to 30N. The sulfide ore sample to be tested is in full contact with both the grinding medium plate A22 and the grinding medium plate B511. The test is timed for T minutes to allow galvanic corrosion to occur between them under the set environmental conditions. The sulfide ore sample C is obtained after the galvanic corrosion reaction between the grinding medium and the sulfide ore.

[0109] 3. When applying pressure through the electric cylinder in experimental step 2, the pressure time T is 1min, 5min, 10min, and 20min respectively. Step 2 is repeated three times at each pressure time. Each time, the obtained sulfide ore sample C is used for flotation experiment and characterization test to obtain flotation indicators and test data such as recovery rate. The flotation index recovery rate is shown in Table 4. Analysis shows that within a certain action time range, the adverse effect of DT4 pure iron grinding medium on the floatability of sulfide ore (chalcopyrite) gradually increases with the increase of action time during the grinding process.

[0110] 4. Combining the experimental data and test data of different pressure application times, we can analyze the effect of galvanic corrosion between DT4 pure iron and sulfide ore on the floatability of target sulfide minerals under different pressure application times, determine whether the grinding medium material has an enhancing effect on the floatability of target sulfide minerals under the influence of different pressure application times, and study the galvanic corrosion mechanism between grinding media and sulfide ore.

[0111] Table 4. Effect of different grinding time on chalcopyrite flotation recovery

[0112]

[0113] Example 6:

[0114] The galvanic corrosion between grinding media and sulfide ore was studied under the influence of different grinding media materials.

[0115] 1. First, prepare the sulfide ore sample required for the experiment, with a particle size of -200 to 300 mesh. In this experiment, a pure chalcopyrite mineral sample was used, which was ultrasonically cleaned and then naturally air-dried. It is called sulfide ore sample A. Take 1 gram of sulfide ore sample A, add 0.5 mL of deionized water and mix well to obtain sulfide ore sample B.

[0116] 2. Next, prepare the grinding media sample. Select two 10-cm square grinding media plates made of 304 stainless steel. Their surfaces are evenly polished and ultrasonically cleaned, then dried to obtain the grinding media plates to be tested. A sample cell 51 matching the size of the grinding media plates to be tested is selected. The grinding media plates to be tested placed in the sample cell 51 are referred to as grinding media plates A22; the grinding media plates to be tested, secured to the bottom of the insulating pressure plate 21, are referred to as grinding media plates B511. The vacuum mechanism 3 is activated to place the contact reaction chamber 1 in a high vacuum state. The atmosphere and temperature control mechanism 6 is used to maintain the atmosphere in the contact reaction chamber 1 at air and a temperature of 20°C. Sample operation is performed through the flexible sealing gloves 72. First, the grinding medium plate A22 is placed in the sample pool 51. Then, the sulfide ore sample A or the sulfide ore sample B is evenly covered on the grinding medium plate A22. The electric cylinder drives the insulating pressure plate 21 to press the grinding medium plate B511 into the sample pool 51. The pressure F is 30N. The sulfide ore sample to be tested is in full contact with the grinding medium plate A22 and the grinding medium plate B511 at the same time. The time is set for 20 minutes to allow them to undergo galvanic corrosion under the set environmental conditions, and the sulfide ore sample C after the galvanic corrosion reaction between the grinding medium and the sulfide ore is obtained.

[0117] 3. Next, prepare the grinding media sample. Select two 10 cm square grinding media plates made of Q235 low-carbon steel. Their surfaces are evenly polished and ultrasonically cleaned, then dried to obtain the grinding media plates to be tested. A sample cell 51 matching the size of the grinding media plates to be tested is selected. The grinding media plates to be tested placed in the sample cell 51 are referred to as grinding media plates A22; the grinding media plates to be tested, secured to the bottom of the insulating pressure plate 21, are referred to as grinding media plates B511. The vacuum mechanism 3 is activated to place the contact reaction chamber 1 in a high vacuum state. The atmosphere and temperature control mechanism 6 is used to maintain the atmosphere in the contact reaction chamber 1 at air and a temperature of 25°C. Sample operation is performed through the flexible sealing gloves 72. First, the grinding medium plate A22 is placed in the sample pool 51. Then, the sulfide ore sample A or the sulfide ore sample B is evenly covered on the grinding medium plate A22. The electric cylinder drives the insulating pressure plate 21 to press the grinding medium plate B511 into the sample pool 51. The pressure F is 30N. The sulfide ore sample to be tested is in full contact with the grinding medium plate A22 and the grinding medium plate B511 at the same time. The time is set for 20 minutes to allow them to undergo galvanic corrosion under the set environmental conditions, and the sulfide ore sample C after the galvanic corrosion reaction between the grinding medium and the sulfide ore is obtained.

[0118] 4. The operation step 2 was repeated three times, and each time the obtained sulfide ore sample C was used for flotation experiments and characterization tests; flotation indicators and test data such as recovery rate under the influence of 304 stainless steel were obtained. The flotation index recovery rate is shown in Table 5. Analysis shows that under the same experimental conditions, the effect of 304 stainless steel grinding media on the floatability of sulfide ore (chalcopyrite) is relatively weak, and 304 stainless steel may have a good enhancing effect on the floatability of the target sulfide ore.

[0119] 5. The operation step 3 was repeated three times, and each time the obtained sulfide ore sample C was used for flotation experiments and characterization tests; flotation indicators and test data such as recovery rate under the influence of Q235 low carbon steel were obtained. The flotation index recovery rate is shown in Table 5. Analysis shows that under the same experimental conditions, Q235 low carbon steel grinding media has a stronger adverse effect on the floatability of sulfide ore (chalcopyrite), and Q235 low carbon steel may not have an enhancing effect on the floatability of the target sulfide ore.

[0120] 6. Combining the experimental data and test data obtained in steps 4 and 5, we can conclude the effect of galvanic corrosion between two different grinding media, 304 stainless steel and Q235 low carbon steel, and sulfide ore on the floatability of the target sulfide mineral, determine whether the grinding medium material has an enhancing effect on the floatability of the target sulfide mineral, and study the galvanic corrosion mechanism between the grinding medium and sulfide ore.

[0121] Table 5. Effect of different grinding media materials on chalcopyrite flotation recovery

[0122] .

Claims

1. An experimental method based on a galvanic corrosion experimental device for grinding media and sulfide ore, characterized by: The experimental device comprises a contact reaction box (1), a vacuum mechanism (3), an atmosphere and temperature control mechanism (6) and a controller (4); a carrying mechanism (5) is provided in the contact reaction box (1), and a pressure mechanism (2) is provided in the contact reaction box (1) just above the carrying mechanism (5); the vacuum mechanism (3) is used to evacuate the contact reaction box (1); the atmosphere and temperature control mechanism (6) is used to adjust the gas type and temperature in the contact reaction box (1); and the controller (4) is electrically connected to the pressure mechanism (2), the vacuum mechanism (3), the carrying mechanism (5) and the atmosphere and temperature control mechanism (6); The pressure mechanism (2) includes an electric cylinder (20) and an insulating pressure plate (21), the electric cylinder (20) is electrically connected to the controller (4), and the insulating pressure plate (21) is connected to the top of the contact reaction box (1) through the electric cylinder (20); A side wall of the contact reaction box (1) is made of a transparent material, and two manual operation components (7) are provided on the side wall. The manual operation component (7) includes a secondary vacuum box (70). One end of the secondary vacuum box (70) extends into the contact reaction box (1) and is hinged with a vacuum gate valve A (71). An end of the secondary vacuum box (70) away from the vacuum gate valve A (71) is connected to the outside world and is sealed with a flexible sealing glove (72). The secondary vacuum box (70) is connected to the vacuum mechanism (3) through a pipeline. A vacuum gauge B (73) is provided on the secondary vacuum box (70), and the vacuum gauge B (73) is electrically connected to the controller (4). The experimental method comprises the following steps: A. Preparation of sulfide ore sample: prepare the pure sulfide ore sample required for the experiment, and ultrasonically clean the pure sulfide ore sample and then air-dry it or vacuum-dry it to obtain sulfide ore sample A; take sulfide ore sample A with a mass of W and add it to a liquid with a volume of V and mix it to obtain sulfide ore sample B; B. Preparation of the grinding medium plate to be tested: Determine that the material of the grinding medium plate is DT4 pure iron, prepare two grinding medium plates of the same size, and evenly polish and ultrasonically clean the surfaces of the two grinding medium plates. After drying, obtain two grinding medium plates to be tested; C. Determine the experimental environment: evacuate the contact reaction box (1) through the vacuum mechanism (3), adjust the gas type and the temperature t in the contact reaction box (1) through the atmosphere and temperature control mechanism (6), and maintain the gas pressure and temperature t in the contact reaction box (1) stable; D. Installing the sulfide ore sample and the grinding medium plate to be tested: one of the grinding medium plates to be tested prepared in step B is fixed to the lower end of the pressure mechanism (2) and is defined as grinding medium plate A (22); the other grinding medium plate to be tested prepared in step B is placed in the sample pool (51) of the supporting mechanism (5) and is defined as grinding medium plate B (511); and then the sulfide ore sample A or the sulfide ore sample B prepared in step A is evenly covered on the grinding medium plate B (511); E. Determine the experimental pressure: according to the experimental requirements, set the pressure F and the pressure action time T applied by the pressure-applying mechanism (2) to the supporting mechanism (5) through the controller (4); F. Conducting a galvanic corrosion experiment: the pressure mechanism (2) drives the grinding medium plate A (22) to press down into the sample pool (51), and the grinding medium plate A (22) acts on the sulfide ore sample A or the sulfide ore sample B on the grinding medium plate B (511) at the pressure F set in step E, and maintains the pressure for a time T. The sulfide ore sample A or the sulfide ore sample B fully contacts the grinding medium plate A (22) and the grinding medium plate B (511) and galvanic corrosion occurs, thereby obtaining a sulfide ore sample C; G. Preparation of different sulfide ore samples C: adjusting a grinding process influencing factor, the grinding process influencing factor including the particle size of the sulfide ore pure mineral sample in step A, the type of liquid in step A, the volume V of the liquid in step A, the material of the grinding medium plate in step B, the bottom area of ​​the grinding medium plate in step B, the type of gas in the contact reaction box (1) in step C, the temperature t in the contact reaction box (1) in step C, the pressure F in step E and the pressure action time T in step E, and then repeating steps A to G to prepare different sulfide ore samples C; H. Perform flotation tests and characterization tests on the sulfide ore sample C in step G to obtain the influence of the grinding process influencing factors on the flotation and beneficiation indicators of the sulfide ore.

2. The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore according to claim 1, characterized in that: An experimental sample placement box (8) is provided in the contact reaction box (1), and the experimental sample placement box (8) is connected to the vacuum mechanism (3) through a pipeline. A notch A is provided on one side of the experimental sample placement box (8) for communicating with the contact reaction box (1), and a vacuum gate valve B (80) is hingedly connected to the notch A. A notch B is provided on the other side of the experimental sample placement box (8) for communicating with the outside world, and a vacuum gate valve C (82) is hingedly connected to the notch B. A vacuum gauge C (81) is provided on the experimental sample placement box (8), and the vacuum gauge C (81) is electrically connected to the controller (4).

3. The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore according to claim 1, characterized in that: The supporting mechanism (5) comprises a supporting seat (50) and a sample pool (51), wherein the supporting seat (50) is arranged at the bottom of the contact reaction box (1), and the sample pool (51) is arranged on the supporting seat (50). A pressure sensor (512) is provided at the bottom inside the sample pool (51), and the pressure sensor (512) is electrically connected to the controller (4).

4. The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore according to claim 1, characterized in that: The vacuum mechanism (3) includes a chassis A (30) and a vacuum gauge A (33). A mechanical pump (31) and a molecular pump (32) are provided in the chassis A (30), and the mechanical pump (31) and the molecular pump (32) are respectively connected to the contact reaction box (1) through pipelines. The vacuum gauge A (33) is provided on the contact reaction box (1), and the mechanical pump (31), the molecular pump (32) and the vacuum gauge A (33) are all electrically connected to the controller (4).

5. The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore according to claim 1, characterized in that: The atmosphere and temperature control mechanism (6) comprises a chassis B (60), an atmosphere adjustment component (61), a temperature adjustment component (62), a temperature sensor (63) and an electronic barometer (64). The atmosphere adjustment component (61) and the temperature adjustment component (62) are both arranged in the chassis B (60) and are respectively connected to the contact reaction box (1). The temperature sensor (63) is arranged in the contact reaction box (1). The electronic barometer (64) is arranged on the contact reaction box (1). The temperature sensor (63) and the electronic barometer (64) are electrically connected to the controller (4).

6. The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore according to claim 5, characterized in that: The atmosphere adjustment component (61) includes a plurality of gas storage tanks, each gas storage tank is connected to the contact reaction box (1) through a pipeline A, and each pipeline A is installed with an electric ball valve, which is electrically connected to the controller (4); the temperature adjustment component (62) is an air conditioner, and the air conditioner is electrically connected to the controller (4).

7. The experimental method of the galvanic corrosion experimental device of grinding media and sulfide ore according to claim 4, characterized in that: In step A, the particle size of the pure mineral sample of sulfide ore is 200-300 mesh, and the liquid is deionized water or a reagent; In step C, the mechanical pump (31) is first started to increase the vacuum degree in the contact reaction box (1) to below 10Pa, and then the molecular pump (32) is started to increase the vacuum degree in the contact reaction box (1) to 10Pa by the mechanical pump (31) and the molecular pump (32). -5 Pa order of magnitude; In step C, the pressure in the contact reaction box (1) is adjusted to be the same as the atmospheric pressure by the atmosphere and temperature control mechanism (6); In step D, the experimenter installs the sulfide ore sample and the grinding medium plate to be tested through the flexible sealing gloves (72).

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