Method for detecting galvanic effect between sulfide minerals in ore

Abstract

The invention discloses a method for detecting a galvanic effect between sulfide minerals in ore. The method comprises the following steps: S1, making a target ore slice and calibrating a three-dimensional coordinate system; s2, the target ore slice is polished and ground, and mineral element distribution information in the target ore slice is obtained; s3, determining coordinates of the target mineral according to the mineral element distribution information; s4, manufacturing a mineral electrode based on the target ore slice; and S5, the mineral electrode is polished and ground, then electrochemical behavior detection is conducted on the sulfide minerals in the mineral electrode according to the coordinates where the target minerals are located, and galvanic effect information between the sulfide minerals is obtained. According to the technical scheme disclosed by the invention, the distribution condition of the target sulfide mineral in the ore can be accurately identified, electrochemical detection of the unoxidized surface of the sulfide mineral is realized, and the method has a great application prospect for revealing and regulating electrochemical reaction in the ore grinding of the sulfide mineral and further improving the mineral flotation separation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral surface chemical property detection, and more specifically, to a method for detecting the galvanic effect of sulfide minerals in an ore. Background Art

[0002] Sulfide minerals usually have semiconductor properties. Due to their different electrostatic potentials, they form tiny electrochemical cells when they come into contact in the slurry. Minerals with more negative potential are oxidized as anodes, while minerals with more positive potential are reduced as cathodes. The strength of the galvanic reaction between sulfide minerals and between sulfide minerals and grinding media affects the corrosion rate, surface properties and flotation behavior of sulfide minerals. Therefore, a deep understanding of the mechanism and influencing factors of the galvanic reaction of sulfide minerals is conducive to guiding the optimization of grinding and flotation processes, thereby improving the utilization rate of mineral resources.

[0003] At present, for pure mineral specimens of sulfide minerals, the Galvani effect between different sulfide minerals is easier to detect because the singleness of the minerals can be guaranteed in a large area. However, due to the high purity of the test samples, the experimental data obtained in this way cannot effectively guide on-site production. The ore in the production and processing process is often composed of multiple minerals, and various minerals are in contact with each other. Because of the Galvani effect, the reactivity of one sulfide mineral will be affected by multiple associated minerals. The development of a detection method for the Galvani effect between sulfide minerals in actual ores can better fit the real environment in the grinding and flotation process, and the experimental data obtained can more effectively guide the practice of mineral flotation separation.

[0004] However, the distribution of minerals in the ore is too fine, usually less than a few hundred microns. The detection object of the electrochemical workstation is the entire ore sample, and it is impossible to obtain the electrochemical property data of only a certain mineral in the ore. Although the micro-area electrochemical microscope can focus the detection probe on a sufficiently small field of view, it cannot determine the type of mineral in the scanned field of view. In recent years, there have been reports on the use of laser etching plane coordinate systems on the surface of ore to observe the surface morphology of oxidized minerals such as carbonates. Compared with the observation of morphology, the precise identification and positioning of different types of minerals requires that the positioning coordinate system must be sufficiently accurate, and sulfide minerals are easily oxidized. The surface area that can be identified by the plane coordinate system is often the sulfide mineral oxide layer, and the electrochemical behavior of the original sulfide mineral cannot be obtained. This requires the etching scheme to take into account the function of removing the sulfide mineral oxide layer.

[0005] Therefore, how to provide a method for detecting the galvanic effect between sulfide minerals in ores, which can accurately identify the distribution of target sulfide minerals in the ore and realize electrochemical detection of the unoxidized surface of sulfide minerals, has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a method for detecting the galvanic effect of sulfide minerals in ores, which can accurately identify the distribution of target sulfide minerals in the ore and realize electrochemical detection of the unoxidized surface of sulfide minerals.

[0007] The technical solution provided by the present invention is as follows:

[0008] The present invention provides a method for detecting the Galvanic effect between sulfide minerals in an ore, comprising the following steps: S1, making a target ore slice, and calibrating a three-dimensional coordinate system for the target ore slice; S2, polishing the target ore slice, and then obtaining mineral element distribution information in the target mineral slice; S3, determining the coordinates of the target mineral according to the mineral element distribution information; S4, then making a mineral electrode based on the target ore slice; S5, polishing the mineral electrode, and then performing electrochemical behavior detection on the sulfide mineral in the mineral electrode according to the coordinates of the target mineral, to obtain the Galvanic effect information between the sulfide minerals.

[0009] Furthermore, in a preferred embodiment of the present invention, in step S1, the step of making target ore slices includes:

[0010] S101, selecting a target ore, and performing surface impurity cleaning treatment on the target ore;

[0011] S102, cutting the target ore according to preset parameters to obtain a number of ore slices, then wrapping the number of ore slices with resin for protection, and performing polishing on the surfaces of the ore slices;

[0012] S103, judging the ore slices to be qualified according to the surface roughness index requirements, and obtaining qualified target ore slices.

[0013] Furthermore, in a preferred embodiment of the present invention, the surface roughness index is specifically required to be within 200 nm.

[0014] Furthermore, in a preferred embodiment of the present invention, in step S1, the step of calibrating the three-dimensional coordinate system of the target ore slice includes:

[0015] S111, presetting a first etching parameter and a second etching parameter;

[0016] S112, carving coordinate axes on the target ore slice by laser etching to establish a three-dimensional coordinate system;

[0017] S113, then according to the first etching parameters, drawing plane coordinate etching lines in the three-dimensional coordinate system to divide the surface of the target ore slice into a plurality of rectangular areas;

[0018] S114. Then, based on the second etching parameters, marking lines with different lengths and depths are drawn in the three-dimensional coordinate system as a depth scale.

[0019] Furthermore, in a preferred embodiment of the present invention, the step of calibrating the three-dimensional coordinate system of the ore slice further includes:

[0020] The etched surface morphology of the target ore slice sample is characterized after etching, and the characterization parameters are etching line width, line depth, and line spacing. The characterization parameter data of the sample is compared with the first etching parameter and the second etching parameter to obtain the target ore slice sample with consistent parameters.

[0021] Furthermore, in a preferred embodiment of the present invention, step S2 further comprises:

[0022] S201, cleaning the etched target ore slice sample, and drying the cleaned target ore slice sample with high-purity nitrogen;

[0023] S202, polishing the target ore slice with a polishing cloth in a glove box based on the depth scale to remove an oxide layer on the surface of the target ore slice;

[0024] S203, performing energy spectrum analysis on the polished target ore slice sample, selecting target mineral elements for element scanning, determining the area where the target mineral is located from the energy spectrum scanning structure, and recording the coordinates of the area.

[0025] Furthermore, in a preferred embodiment of the present invention, in step S4, the step of making the mineral electrode comprises:

[0026] S401, firstly, a layer of conductive glue is disposed at the center of the non-etched surface of the target mineral slice, and one end of the wire is attached to the conductive glue;

[0027] S402, selecting a mold of appropriate size according to test requirements;

[0028] S403, then placing the target mineral slice with the etched surface facing downward in the mold, and casting and fixing the target mineral slice and the wire with epoxy resin and curing agent to obtain a mineral electrode.

[0029] Furthermore, in a preferred embodiment of the present invention, the step of making the mineral electrode further comprises:

[0030] After the conductor is installed, a layer of grinding medium is arranged between the target mineral slice and the conductor, and the grinding medium is consistent with the size and thickness of the target mineral slice.

[0031] Furthermore, in a preferred embodiment of the present invention, the epoxy resin and the curing agent are uniformly mixed, and the mixing ratio of the epoxy resin to the fixing agent is 10:3.

[0032] Furthermore, in a preferred embodiment of the present invention, step S5 specifically includes:

[0033] S501, firstly, ultrasonically clean the mineral electrode, and blow dry the cleaned mineral electrode sample with high-purity nitrogen;

[0034] S502, based on the depth scale, polishing the etched area on the surface of the mineral electrode with a polishing cloth in a glove box to remove the surface oxide layer;

[0035] S503, then connecting the mineral electrode to an electrochemical workstation, positioning the detection probe or analysis probe of the characterization technology to the corresponding coordinates based on the coordinates of the target mineral area, conducting electrochemical behavior detection of the mineral, and obtaining the Galvanic effect information between sulfide minerals.

[0036] The present invention provides a method for detecting the inter-galvanic effect of sulfide minerals in an ore, comprising the following steps: S1, making a target ore slice, and calibrating a three-dimensional coordinate system for the target ore slice; S2, polishing the target ore slice, and then obtaining mineral element distribution information in the target mineral slice;

[0037] S3, determining the coordinates of the target mineral according to the mineral element distribution information; S4, then making a mineral electrode based on the target ore slice; S5, polishing the mineral electrode, and then detecting the electrochemical behavior of the sulfide minerals in the mineral electrode according to the coordinates of the target mineral to obtain the Galvani effect information between the sulfide minerals. The method for detecting the inter-Galvani effect of sulfide minerals in the ore provided by the present invention can realize the accurate positioning of the target minerals in the ore and the electrochemical detection of the unoxidized surface of the sulfide minerals, and ensure the in-situ, authenticity and homology of the data on the chemical properties of the mineral surface to the greatest extent, and provide theoretical support for the efficient development and utilization of ore resources; the method flow mainly includes five steps, firstly, for the sulfide minerals that need to be detected by electrochemical behavior, the corresponding target minerals are selected, and the target ore is cut into slices according to preset parameters to obtain a number of target ore slices, and then the three-dimensional coordinate system is calibrated for the target ore slices, that is, the three-dimensional coordinate system is depicted on the surface of the target ore slices so that the ore slices have clear coordinate values; then, the mineral element distribution information in the target mineral slices needs to be determined, and the target element to be detected is obtained through the mineral element distribution information. The distribution of elements, and before obtaining the mineral element distribution information, the target mineral slice needs to be polished, and the oxide layer on the slice surface is removed for the first time by polishing; the next step is to determine the location of the target mineral in the depicted three-dimensional coordinate system based on the mineral element distribution information, so as to achieve accurate positioning of the target mineral to be measured; after determining the location of the target mineral in the target ore slice, the target mineral is then subjected to electrochemical behavior detection, and detection preparation is required before detection, that is, the target ore slice is made into a mineral electrode; after the mineral electrode is prepared, it is then necessary to perform polishing to remove the oxide layer on the slice surface again, and then dock the detection equipment according to the location of the target mineral, and perform electrochemical behavior detection on the mineral electrode, so as to obtain the Galvani effect information between the sulfide minerals in the ore. Therefore, compared with the prior art, the technical solution involved in the present invention can accurately identify the distribution of the target sulfide mineral in the ore, realize the electrochemical detection of the unoxidized surface of the sulfide mineral, and obtain the Galvani effect information between the sulfide minerals. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1It is a flow chart of the steps of the method for detecting the inter-galvanic effect of sulfide minerals in the ore involved in an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of manufacturing the mineral electrode involved in an embodiment of the present invention;

[0041] Figure 3 It is a schematic structural diagram of the mineral electrode involved in an embodiment of the present invention;

[0042] Figure 4 A schematic diagram of the target ore slice being cut and etched according to an embodiment of the present invention;

[0043] Figure 5 A depth scan diagram of the depth scale involved in the embodiment of the present invention;

[0044] Figure 6 The scanning electron microscope energy spectrum analysis diagram of the target elements Ni, Fe, Cu, and S involved in the embodiments of the present invention;

[0045] Figure 7 This is an electrochemical reaction activity diagram of the copper-nickel region involved in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0050] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0051] Please Figures 1 to 7 As shown, the present invention provides a method for detecting the Galvanic effect between sulfide minerals in an ore, comprising the following steps: S1, making a target ore slice, and calibrating a three-dimensional coordinate system for the target ore slice; S2, polishing the target ore slice, and then obtaining the mineral element distribution information in the target mineral slice; S3, determining the coordinates of the target mineral according to the mineral element distribution information; S4, then making a mineral electrode based on the target ore slice; S5, polishing the mineral electrode, and then performing electrochemical behavior detection on the sulfide mineral in the mineral electrode according to the coordinates of the target mineral, and obtaining the Galvanic effect information between the sulfide minerals. The technical solution involved in the present invention can accurately identify the distribution of the target sulfide mineral in the ore, realize the electrochemical detection of the unoxidized surface of the sulfide mineral, and obtain the Galvanic effect information between the sulfide minerals.

[0052] The following is a specific description of the method for detecting the inter-Galvani effect of sulfide minerals in the ore disclosed by the present invention in combination with a specific embodiment. In this embodiment, copper-nickel sulfide ore is the implementation object; this embodiment provides a method for exploring the inter-Galvani effect of copper-nickel sulfide minerals in copper-nickel ore, and the method specifically includes the following steps:

[0053] The main element composition of the ore used in this embodiment is shown in Table 1:

[0054] Mineral Type Cu(wt%) Ni(wt%) Fe(wt%) S (wt%) Others (wt%) Pentlandite 2.9 11.9 46.5 37.0 1.7

[0055] Table 1 Original grade of ore

[0056] S1. Prepare a target ore slice and calibrate a three-dimensional coordinate system for the target ore slice.

[0057] In the embodiment of the present invention, step S1 is to prepare a target ore slice for the copper-nickel ore, and then calibrate a three-dimensional coordinate system on the copper-nickel ore slice.

[0058] Specifically, in an embodiment of the present invention, in step S1, the step of making target ore slices includes: S101, selecting a target ore, and cleaning the surface impurities of the target ore; S102, cutting the target ore according to preset parameters to obtain a number of ore slices, then wrapping the several ore slices with resin for protection, and polishing the surface of the ore slices; S103, judging the qualification of the ore slices according to the surface roughness index requirements, and obtaining qualified target ore slices.

[0059] Specifically, in the embodiment of the present invention, the surface roughness index requirement is that the roughness is within 200 nm.

[0060] Among them, in this embodiment, in step S1, copper-nickel ore with a cross-sectional area greater than 10mm×10mm is selected, fine mud, impurities, etc. on the surface of the ore are cleaned, and then the actual ore is cut by a petrographic sample cutting machine, and ore slices with a length and width of 10mm and a thickness of 2mm are cut based on the preset parameters of the slices to prepare a plurality of ore slices; then the ore slices are wrapped with resin for protection, and the surface of the ore slices is polished and polished by a fully automatic metallographic sample polishing machine, and the roughness of the polished surface is tested, wherein the sandpaper mesh numbers used by the fully automatic metallographic sample polishing machine during polishing are 1200 mesh, 2500 mesh, 4000 mesh, 5000 mesh, and 7000 mesh respectively, and the polishing liquid is 0.25μm diamond suspension polishing liquid for polishing for 2min; after polishing the ore slices, suitable target ore slices are screened out at 200nm.

[0061] Specifically, in an embodiment of the present invention, in step S1, the step of calibrating the three-dimensional coordinate system of the target ore slice includes: S111, presetting a first etching parameter and a second etching parameter; S112, engraving the coordinate axis on the target ore slice by laser etching to establish a three-dimensional coordinate system; S113, then according to the first etching parameter, engraving plane coordinate etching lines in the three-dimensional coordinate system to divide the surface of the target ore slice into a number of rectangular areas; S114, then based on the second etching parameter, engraving marking lines of different lengths and depths in the three-dimensional coordinate system as a depth scale.

[0062] In this embodiment, Keyence MD-T1010 is used to perform laser etching on the target ore slice, the etching laser power is 90 kWh, the etching speed is 1500 mm / s, the etching time is 65 s, and the line spacing is 0.02 mm.

[0063] Specifically, in an embodiment of the present invention, the first etching parameters are as follows: the total area of ​​the laser etching region is 6250μm×6250μm, the minimum square area is 250μm×250μm, the etching line depth is 50μm, the line width is 30μm, and the line width becomes 50μm every 1250μm.

[0064] Specifically, in an embodiment of the present invention, the second etching parameters are as follows: in the set area, the etching line parameters from top to bottom are respectively line depth 40μm, line length 1250μm; line depth 30μm, line length 1000μm; line depth 20μm, line length 750μm; line depth 10μm, line length 500μm.

[0065] Among them, in this embodiment, the plane coordinate etching line is based on the first etching parameter, and the depth scale is based on the second etching parameter. The plane coordinate etching line is used to divide the laser etching area into a plurality of rectangular areas. The position of the target mineral can be more accurately located through the rectangular areas, and the block planning and design of the target ore slices are also convenient for obtaining the electrochemical behavior differences of the target minerals; the depth of the etching center depth scale area line is as follows: Figure 5 As shown, the depth scale is depicted based on the second etching parameter, and the depth scale is a positioning mark used to determine the depth of the polished and etched surface in the step of removing the oxide layer on the surface of the ore.

[0066] Specifically, in an embodiment of the present invention, the step of calibrating the three-dimensional coordinate system of the ore slice also includes: characterizing the morphology of the etching surface of the target ore slice sample after etching, wherein the characterization parameters are etching line width, line depth, and line spacing, and comparing the characterization parameter data of the sample with the first etching parameter and the second etching parameter to obtain the target ore slice sample with consistent parameters.

[0067] S2, polishing the target ore slice, and then obtaining mineral element distribution information in the target mineral slice.

[0068] S3. Determine the coordinates of the target mineral according to the mineral element distribution information.

[0069] In this embodiment, steps S2 and S3 perform elemental analysis on the etched area of ​​the ore slice with the aid of a scanning electron microscope energy spectrometer, and then determine the coordinates of the pentlandite area based on the elemental composition of the pentlandite.

[0070] Specifically, in an embodiment of the present invention, step S2 further includes: S201, cleaning the target ore slice sample after etching, and blowing the cleaned target ore slice sample with high-purity nitrogen; S202, based on the depth scale, polishing the target ore slice with a polishing cloth in a glove box to remove the oxide layer on the surface of the target ore slice; S203, performing energy spectrum analysis on the polished target ore slice sample, selecting the target mineral element for element scanning, determining the area where the target mineral is located from the energy spectrum scanning structure, and recording the coordinates of the area.

[0071] Specifically, in the embodiment of the present invention, in S201, the step of cleaning the etched target ore slice sample is as follows: placing the target ore slice in a beaker of anhydrous ethanol, and placing an ultrasonic cleaner in the beaker for ultrasonic treatment for 5 minutes.

[0072] Specifically, in the embodiment of the present invention, in S202, the cleaned ore slice is polished in a glove box using a 20000 mesh polishing cloth until the 10 μm depth scale disappears.

[0073] Wherein, in step S2, a scanning electron microscope energy spectrometer is used to analyze and obtain the element distribution information of the target mineral; for this embodiment, the elements Ni, Fe, and S constituting pentlandite are selected for surface scanning, and the area where the pentlandite is located in the ore sample is determined from the element surface scanning results, and the coordinates of the area are recorded. The scanning electron microscope energy spectrum analysis diagram of the target elements Ni, Fe, Cu, and S in this embodiment is shown in FIG. Figure 6 As shown, the location of the copper-nickel associated area can be determined.

[0074] S4. Then, a mineral electrode is manufactured based on the target ore slice.

[0075] Specifically, in an embodiment of the present invention, in step S4, the step of making a mineral electrode includes: S401, firstly setting a layer of conductive glue at the center of the non-etched surface of the target mineral slice, and sticking one end of the wire on the conductive glue; S402, selecting a mold of a suitable size according to the test requirements; S403, then placing the target mineral slice with the etched surface facing down in the mold, and casting and fixing the target mineral slice and the wire with epoxy resin and curing agent to obtain a mineral electrode.

[0076] Specifically, in the embodiment of the present invention, the epoxy resin and the curing agent are uniformly mixed, and the mixing ratio of the epoxy resin to the fixing agent is 10:3.

[0077] Among them, in this embodiment, according to the scanning electrochemical microscope model used, a cylindrical mold with a diameter of 25 mm and a height of 20 mm is selected, and then the epoxy resin and the curing agent are mixed in a ratio of 10:3, stirred evenly and poured into the mold, and placed at room temperature for 3 hours to obtain the mineral electrode after being fixed.

[0078] Specifically, in an embodiment of the present invention, the step of making a mineral electrode further includes: after the wire is installed, a layer of grinding medium is arranged between the target mineral slice and the wire, and the grinding medium is consistent with the size and thickness of the target mineral slice.

[0079] See Figure 2 As shown, in an embodiment of the present invention, the main structure of the mineral electrode is composed of the target ore slice 1, the conductive glue 2, the wire 3 and the grinding medium 4; the upper surface of the target ore slice 1 is laser etched, the conductive glue 2 is arranged on the non-etched surface of the target ore slice 1, the wire 3 is connected to the target ore slice 1 through the conductive glue 2, and the grinding medium 4 is arranged under the conductive glue 2 to meet different detection purposes.

[0080] S5, polishing the mineral electrode, and then detecting the electrochemical behavior of the sulfide minerals in the mineral electrode according to the coordinates of the target mineral to obtain the Galvanic effect information between the sulfide minerals.

[0081] Specifically, in an embodiment of the present invention, step S5 specifically includes: S501, first ultrasonically cleaning the mineral electrode, and blowing the cleaned mineral electrode sample dry with high-purity nitrogen; S502, then based on the depth scale, using a polishing cloth in a glove box to polish the etched area on the surface of the mineral electrode to remove its surface oxide layer; S503, then connecting the mineral electrode to an electrochemical workstation, based on the coordinates of the target mineral area, positioning the detection probe or analysis probe of the characterization technology to the corresponding coordinates, carrying out electrochemical behavior detection of the mineral, and obtaining the galvanic effect information between sulfide minerals.

[0082] Specifically, in the embodiment of the present invention, the characterization technology includes: scanning electrochemical microscopy technology, micro-area electrochemical impedance technology and scanning Kelvin probe technology.

[0083] Specifically, in the embodiment of the present invention, in step S502, the etched surface of the cleaned electrode sample is polished with 20000-grit sandpaper in a glove box until the 20 μm depth scale disappears, thereby removing the surface oxide layer.

[0084] Specifically, in an embodiment of the present invention, the steps of conducting electrochemical behavior detection of minerals include: connecting the mineral motor to the electrochemical workstation after pre-treatment with flotation agents; using a probe to locate the associated area of ​​the target mineral; determining the working voltage value, making an approximation curve through the probe, and determining the distance between the probe and the surface of the electrode sample; fixing the probe distance and scanning the set area, scanning the electrochemical reaction activity surface of the set area, and obtaining the electrochemical reaction activity information of the target mineral.

[0085] Among them, in this embodiment, the electrochemical behavior detection of minerals is carried out specifically by placing the electrode sample on the stage of the VersaSCAN micro-area electrochemical testing system and performing a scanning electrochemical microscope test; in this embodiment, in the steps of performing the scanning electrochemical microscope test, first, a solution containing 0.01 mol / L potassium ferrocyanide and 0.1 mol / L potassium chloride is prepared, the electrode sample is immersed in the stage, and the electrochemical workstation is connected; a platinum wire probe with a diameter of 10 μm is selected to locate the copper-nickel sulfide ore associated area determined in S230; an approximation curve is made with a voltage value of 0.5 V to determine that the distance between the probe and the sample surface is 25 μm; the probe distance is fixed to 25 μm, the probe scanning area range is set to 500 μm*500 μm, the scanning speed is 20 μm / s, the scanning step length is 5 μm, and the electrochemical reaction activity surface of the copper-nickel area is scanned, and the obtained electrochemical reaction activity diagram is as shown in Figure 7 shown.

[0086] In summary, an embodiment of the present invention relates to a method for detecting the Galvani effect between sulfide minerals in an ore. A coordinate system is etched on the surface of an ore using laser etching technology. Combined with energy spectrum analysis, the coordinates of various minerals in the ore sample can be determined to achieve accurate positioning of the mineral distribution in the actual ore. The etched samples are used to make electrodes suitable for micro-area detection technology. The probe is placed at the coordinates of the mineral to be studied according to the test requirements, so as to explore the Galvani effect between sulfide minerals. The method for detecting the galvanic effect between sulfide minerals in the ore provided by the present invention can realize the accurate positioning of the target mineral in the ore and the electrochemical detection of the unoxidized surface of the sulfide mineral. Since the different mineral phases under study are on the same ore sample, the consistency of the processing conditions for different mineral phases can be guaranteed, and the in-situ, authenticity and homology of the surface chemical property data of the mineral can be guaranteed to the greatest extent, providing theoretical support for the efficient development and utilization of ore resources. The method flow mainly includes five steps. First, for the sulfide mineral that needs to be electrochemically detected, the corresponding target mineral is selected, and the target ore is cut into slices according to preset parameters to obtain a number of target ore slices. Then, the three-dimensional coordinate system is calibrated for the target ore slice, that is, the three-dimensional coordinate system is depicted on the surface of the target ore slice so that the ore slice has clear coordinate values. Then, the distribution information of the mineral elements in the target mineral slice needs to be determined. The distribution of the target element to be detected is obtained through the mineral element distribution information, and before obtaining the mineral element distribution information, the target mineral slice needs to be polished, and the oxide layer on the slice surface is removed for the first time through polishing; the next step is to determine the location of the target mineral in the depicted three-dimensional coordinate system based on the mineral element distribution information, so as to achieve accurate positioning of the target mineral to be detected; after determining the location of the target mineral in the target ore slice, the target mineral is then subjected to electrochemical behavior detection, and detection preparation is required before detection, that is, the target ore slice is made into a mineral electrode; after the mineral electrode is prepared, it is then necessary to perform polishing to remove the oxide layer on the slice surface again, and then dock the detection equipment according to the location of the target mineral, and perform electrochemical behavior detection on the mineral electrode, so as to obtain the Galvani effect information between the sulfide minerals in the ore. Therefore, compared with the prior art, the technical solution involved in the present invention can accurately identify the distribution of the target sulfide mineral in the ore, realize the electrochemical detection of the unoxidized surface of the sulfide mineral, and obtain the Galvani effect information between the sulfide minerals.

[0087] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting the inter-galvanic effect of sulfide minerals in an ore, characterized in that: The following steps are involved: S1. Making a target ore slice and calibrating a three-dimensional coordinate system for the target ore slice; S2, polishing the target ore slice to obtain mineral element distribution information in the target mineral slice; S3, determining the coordinates of the target mineral according to the mineral element distribution information; S4, manufacturing a mineral electrode based on the target ore slice; S5. Polishing the mineral electrode, and detecting the electrochemical behavior of the sulfide minerals in the mineral electrode according to the coordinates of the target mineral to obtain the Galvanic effect information between the sulfide minerals.

2. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 1, characterized in that: In step S1, the step of making target ore slices includes: S101, selecting a target ore, and performing surface impurity cleaning treatment on the target ore; S102, cutting the target ore according to preset parameters to obtain a number of ore slices, then wrapping the number of ore slices with resin for protection, and performing polishing on the surfaces of the ore slices; S103, judging the ore slices to be qualified according to the surface roughness index requirements, and obtaining qualified target ore slices.

3. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 2, characterized in that: The surface roughness index requirement is specifically that the roughness is within 200 nm.

4. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 2, characterized in that: In step S1, the step of calibrating the three-dimensional coordinate system of the target ore slice includes: S111, presetting a first etching parameter and a second etching parameter; S112, carving coordinate axes on the target ore slice by laser etching to establish a three-dimensional coordinate system; S113, according to the first etching parameters, drawing plane coordinate etching lines in the three-dimensional coordinate system to divide the surface of the target ore slice into a plurality of rectangular areas; S114. Based on the second etching parameters, marking lines of different lengths and depths are drawn in the three-dimensional coordinate system as a depth scale.

5. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 4, characterized in that: The step of calibrating the three-dimensional coordinate system of the ore slice also includes: The etched surface morphology of the target ore slice sample is characterized after etching, and the characterization parameters are etching line width, line depth, and line spacing. The characterization parameter data of the sample is compared with the first etching parameter and the second etching parameter to obtain the target ore slice sample with consistent parameters.

6. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 1, characterized in that: Step S2 further comprises: S201, cleaning the etched target ore slice sample, and drying the cleaned target ore slice sample with high-purity nitrogen; S202, polishing the target ore slice with a polishing cloth in a glove box based on the depth scale to remove an oxide layer on the surface of the target ore slice; S203, performing energy spectrum analysis on the polished target ore slice sample, selecting target mineral elements for element scanning, determining the area where the target mineral is located from the energy spectrum scanning structure, and recording the coordinates of the area.

7. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 1, characterized in that: In step S4, the steps of making the mineral electrode include: S401, disposing a layer of conductive glue at the center of the non-etched surface of the target mineral slice, and pasting one end of the wire on the conductive glue; S402, selecting a mold of appropriate size according to test requirements; S403, placing the target mineral slice with the etched surface facing downward in the mold, casting and fixing the target mineral slice and the wire with epoxy resin and curing agent to obtain a mineral electrode.

8. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 7, characterized in that: The step of making the mineral electrode also includes: After the conductor is installed, a layer of grinding medium is arranged between the target mineral slice and the conductor, and the grinding medium is consistent with the size and thickness of the target mineral slice.

9. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 7, characterized in that: The epoxy resin and the curing agent are uniformly mixed, and the mixing ratio of the epoxy resin to the fixing agent is 10:

3.

10. The method for detecting the inter-galvanic effect of sulfide minerals in ores according to claim 1, characterized in that: Step S5 specifically includes: S501, performing ultrasonic cleaning on the mineral electrode, and blowing the cleaned mineral electrode sample dry with high-purity nitrogen; S502, based on the depth scale, polishing the etched area on the surface of the mineral electrode with a polishing cloth in a glove box to remove the surface oxide layer; S503, connecting the mineral electrode to an electrochemical workstation, positioning the detection probe or analysis probe of the characterization technology to the corresponding coordinates based on the coordinates of the target mineral region, conducting electrochemical behavior detection of the mineral, and obtaining the Galvanic effect information between sulfide minerals.

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