CN111912878A - An experimental measurement device for electrical parameters of seabed polymetallic sulfide rocks - Google Patents

Abstract

The embodiment of the present invention provides an experimental measurement device for electrical parameters of seabed polymetallic sulfide rocks, including: a micro tank, a rock sample sleeve and an electrode; the micro tank includes a first micro tank and a second micro tank; the first micro tank and The second micro water tank is respectively arranged at both ends of the rock sample sleeve; the inside of the micro water tank is filled with liquid to simulate the seabed environment; the inside of the rock sample sleeve is used for accommodating the sample of the seabed polymetallic sulfide rock to be measured, and the electrode includes The first electrode and the second electrode are respectively arranged on both ends of the rock sample sleeve. In the embodiment of the present invention, the sealed micro water tank is arranged at both ends of the rock sample sleeve, which can better simulate the seabed environment, is beneficial to obtain the electrical parameters of the seabed polymetallic sulfide rock in the in-situ environment, and can also improve the measurement Accuracy, improve measurement efficiency, and have strong rock sample protection ability.

Description

An experimental measurement device for electrical parameters of seabed polymetallic sulfide rocks

technical field

The invention relates to the field of rock electrical parameter measurement, and more particularly, to an experimental measurement device for the electrical parameters of seabed polymetallic sulfide rocks.

Background technique

Seabed polymetallic sulfides are rich in copper, iron, nickel, silver, gold and other metal elements, and are a kind of potential mineral resources. There are obvious differences in parameters such as polarizability and resistivity between seabed polymetallic sulfides and surrounding rocks. Therefore, electrical exploration is an effective method to identify and evaluate seabed polymetallic sulfides. The electrical characteristics of rock ores are the bridge between electrical exploration data and ore body geological information. It can accurately and efficiently measure the electrical parameters of seabed polymetallic sulfide rock samples in the in situ environment in the laboratory to understand seabed polymetallics. The relationship between the electrical parameters of sulfides and the types of metal minerals, metal mineral content and other factors is helpful to more accurately interpret the actual exploration data.

Submarine polymetallic sulfides are different from conventional terrestrial metal ores in structural characteristics and occurrence environment. Terrestrial metal ores are usually dense, so the content of pore water in the rock is low, and the pore water is usually groundwater with weak conductivity; submarine polymetallic sulfide rocks usually have high permeability and high porosity, and due to long-term In the seabed environment, the pores are filled with seawater, and the seawater has strong electrical conductivity, and its resistivity is only 0.2-0.3Ω·m. It can be seen that the electrical characteristics of terrestrial metal ores are mainly controlled by the structural components of the rock itself, and the groundwater has less influence, while the electrical characteristics of seabed polymetallic sulfides are not only controlled by their own structural components, but also to a greater extent. affected by seawater. Therefore, it is necessary to restore the in-situ environment as much as possible when experimentally measuring the electrical parameters of polymetallic sulfides on the seabed.

However, the experimental measurement devices for rock electrical parameters in the prior art are generally divided into two types: two-electrode devices and four-electrode devices. Among them, the two-electrode device is easy to operate, but the electrode will be polarized, and there is contact resistance between the electrode and the rock sample, which affects the experimental measurement; the four-electrode method can eliminate the influence of the polarization of the power supply electrode, but the measurement operation is relatively complicated. In general, the rock electrical parameter measurement devices in the prior art have at least the following defects: 1. The current devices are mainly designed for terrestrial rocks and ores, and cannot accurately measure seabed polymetallic sulfides; 2. It is difficult to improve the measurement Efficiency while eliminating the interference of power supply electrode polarization to measurement; 3. Lack of high-performance electrode materials, the stability of the measurement is difficult to guarantee; 4. The device lacks sealing, and the measurement process is easily affected by the external environment.

SUMMARY OF THE INVENTION

In order to solve the above problems, the embodiments of the present invention provide an experimental measurement device for the electrical parameters of seabed polymetallic sulfide rocks that overcomes the above problems or at least partially solves the above problems.

The apparatus for experimentally measuring the electrical parameters of the submarine polymetallic sulfide rock provided by the embodiment of the present invention includes: a micro water tank, a rock sample sleeve and an electrode; the micro water tank includes a first micro water tank and a second micro water tank; the first micro water tank and the second micro water tank Two micro water tanks are respectively arranged at both ends of the rock sample sleeve; the inside of the micro water tank is filled with liquid to simulate the seabed environment; the inside of the rock sample sleeve is used to accommodate the samples of seabed polymetallic sulfide rocks to be measured, and the electrodes include the first An electrode and a second electrode, the first electrode and the second electrode are respectively arranged on both ends of the rock sample sleeve.

The first micro water tank includes a first chamber, and the second micro water tank includes a second chamber; the shapes of the first chamber and the second chamber match the shape of the rock sample sleeve, and the first micro water tank passes through the second chamber. A chamber is connected with one end of the rock sample sleeve, and the second micro water tank is connected with the other end of the rock sample sleeve through the second chamber.

Wherein, the first electrode includes a first power supply electrode and a first measurement electrode, and the second electrode includes a second power supply electrode and a second measurement electrode; the first measurement electrode is arranged in the first chamber, and the first power supply electrode is embedded in the first micro tank The second measuring electrode is arranged in the second chamber, and the second power supply electrode is embedded in the second micro water tank on the opposite side of the second chamber.

Wherein, the device further includes a sliding rail, and the first micro water tank and the second micro water tank are connected by the sliding rail.

Wherein, the upper parts of the first micro water tank and the second micro water tank are provided with liquid injection holes and exhaust holes.

Wherein, the device further includes a first socket and a second socket; the first socket is arranged in the first micro water tank, the second socket is arranged in the second micro water tank; the first socket is connected with the first power supply electrode and the first measurement electrode, The two sockets are connected with the second power supply electrode and the second measurement electrode.

Among them, the material of the micro water tank is plexiglass.

Wherein, the first power supply electrode and the second power supply electrode are mesh metal platinum electrodes; the material of the first measurement electrode and the second measurement electrode is annular silver wire.

Wherein, the material of the rock sample sleeve is insulating silicon, so as to wrap the side of the sample of the seabed polymetallic sulfide rock to be measured.

Wherein, the device further comprises a hose clamp, the hose clamp is used for holding the rock sample sleeve, so that the rock sample sleeve is closely attached to the sample of the seabed polymetallic sulfide rock to be measured.

Compared with the prior art, the device for experimental measurement of electrical parameters of seabed polymetallic sulfide rocks provided by the embodiment of the present invention has at least the following beneficial effects: closed micro-grooves are arranged at both ends of the rock sample sleeve, which can better simulate the seabed environment, which is beneficial to obtain the electrical parameters of submarine polymetallic sulfide rocks in the in situ environment;

The measuring electrode and the power supply electrode are separated, the electrode is integrated in the water tank, and the guide rail is arranged outside the device, which not only eliminates the influence of the polarization of the power supply electrode, but also greatly improves the measurement efficiency;

The mesh platinum electrode is designed as the power supply electrode to ensure that the power supply electrode can remain stable in the seawater environment for a long time; the ring-shaped silver-silver chloride electrode is designed as the measuring electrode, which eliminates the influence of the polarization of the measuring electrode on the measurement and avoids the The traditional copper-copper sulfate electrode pollutes the rock sample, while the silver-silver chloride electrode can be reused through regular electroplating, saving costs.

The rock sample sleeve is designed to improve the overall sealing performance of the device. In the device, the two ends of the rock will not be squeezed, which not only protects the physical structure of the rock sample, but also eliminates the influence of the contact resistance on the measurement. In addition, the side of the rock sample is tightly wrapped by the sleeve, which ensures that the pore water is not easily volatilized during the measurement process, and also avoids the formation of redundant current loops on the rock surface.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of a cross-section of an experimental measurement device for electrical parameters of submarine polymetallic sulfide rocks provided in an embodiment of the present invention;

2 is a three-dimensional schematic structural diagram of an experimental measurement device for electrical parameters of seabed polymetallic sulfide rocks provided by an embodiment of the present invention;

FIG. 3 is a schematic flowchart of replacing a rock sample according to an embodiment of the present invention.

In the figure, 1: micro water tank; 2: exhaust hole; 3: power supply electrode; 4: socket; 5: injection hole; 6: socket; 7: hose clamp; 8: measuring electrode; 9: seawater; 10: Rock sample sleeve.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are disclosed. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In view of the above-mentioned defects of the rock electrical experimental devices commonly used in the existing technology, comprehensively considering the advanced experimental technology and the latest development trend of related foreign devices, and taking into account the practicability, it is necessary to design a new submarine polymetallic from the following aspects An experimental measurement device for electrical parameters of sulfide rocks.

1-2, an embodiment of the present invention provides an experimental measurement device for electrical parameters of seabed polymetallic sulfide rocks, including: a micro tank 1, a rock sample sleeve 10 and electrodes; the micro tank 1 includes a first micro tank and a second micro tank Two micro water tanks; the first micro water tank and the second micro water tank are respectively arranged on both ends of the rock sample sleeve 10; the inside of the micro water tank 1 is filled with liquid to simulate the seabed environment; the inside of the rock sample sleeve 10 is used to accommodate the to-be-measured The sample of the seabed polymetallic sulfide rock, the electrodes include a first electrode and a second electrode, and the first electrode and the second electrode are respectively arranged at both ends of the rock sample sleeve 10 .

Among them, micro-grooves are arranged at both ends of the sleeve for accommodating the sample, which can ensure that the rock sample is always in a salt-saturated environment during the measurement of electrical parameters, and effectively restore the seabed environment. In order to obtain seabed polymetallic sulfide rocks The electrical parameters in the in situ environment provide strong support. Wherein, the above-mentioned liquid may be seawater. The first micro water tank can be the water tank on the left side of the rock sample sleeve 10 in FIG. 1 , and the second micro water tank can be the water tank on the right side of the rock sample sleeve 10 .

The micro tank is the key to simulate the seabed environment. As an optional embodiment, the material of the micro tank is plexiglass, that is, the tank is made of plexiglass. This insulating material has good transparency, chemical stability, and weather resistance. And mechanical properties, can ensure that the tank is in a stable state for a long time. In addition, the micro water tank 1 is provided with a top cover, and the top cover is provided with a liquid injection hole 5 and an exhaust hole 2 . Two micro-sinks are respectively connected to the left and right sides of the rock sample sleeve. The device has good sealing performance as a whole, which ensures that the measurement process is not disturbed by air.

Based on the content of the above embodiment, as an optional embodiment, the first electrode includes a first power supply electrode and a first measurement electrode, and the second electrode includes a second power supply electrode and a second measurement electrode; In a chamber, the first power supply electrode is embedded in the side of the first micro water tank opposite to the first chamber; the second measurement electrode is arranged in the second chamber, and the second power supply electrode is embedded in the second micro water tank and the second the opposite side of the chamber.

Based on the content of the foregoing embodiment, as an optional embodiment, the first micro water tank and the second micro water tank are connected by a slide rail.

Based on the content of the above embodiment, as an optional embodiment, the device further includes a first socket and a second socket; the first socket is arranged in the first micro water tank, and the second socket is arranged in the second micro water tank; the first socket It is connected with the first power supply electrode and the first measurement electrode, and the second socket is connected with the second power supply electrode and the second measurement electrode.

Specifically, the embodiment of the present invention improves the measurement efficiency under the condition of eliminating the polarization of the power supply electrode through the following two aspects.

First, in the experimental measurement of rock electrical parameters in the laboratory, rock samples are generally processed into standard columns with a diameter of 1 inch, but the length of each rock sample may vary to some extent. By arranging slide rails in the device provided in the embodiment of the present invention, for example, two slide rails as shown in FIG. 2 , the distance between the first micro water tank and the second micro water tank can be adjusted according to the length of the rock sample, So as to meet the measurement needs of rock samples of different lengths. Then, when measuring a batch of rock samples, the steps of replacing the rock samples are shown in Fig. 3, which can be as follows: Step 101, open the top cover of the water tank, and suck out the seawater; Step 102, then separate the core sleeve from the micro water tank, and replace the sleeve After the middle rock sample, connect the sleeve to the water tank again; step 103, inject seawater again.

In the second aspect, in addition to installing the slide rail in the device, the power supply and measurement electrodes in the traditional two-electrode method are separated, so that the power supply electrode 3 is embedded in the outer edge of the micro water tank through the groove, and the measurement electrode 8 is fixed on the inner side of the water tank. Inside the chamber (which can be a cylindrical chamber, for example). The power supply electrode 3 and the signal acquisition instrument can be connected to the electrode through the socket 4 . The power supply electrode 3 is connected to the signal transmitter through the socket 4 , and the measurement electrode 8 is connected to the signal receiver through the socket 6 . When changing the rock sample, the electrode moves with the water tank and does not need to be disassembled separately. It should be noted that this design method can eliminate the influence of the polarization of the power supply electrode, and can further improve the measurement efficiency.

It should be noted that, in the embodiment of the present invention, the power supply electrode and the measurement electrode in the traditional two-pole method are separated, so as to eliminate the influence of the polarization of the power supply electrode. The device adopts a modular design, and a slide rail is installed on the outside of the device to improve the measurement efficiency. Therefore, while eliminating the polarization of the power supply electrode, the measurement efficiency is significantly improved, breaking through the bottleneck of traditional two-electrode and four-electrode devices.

Based on the content of the above embodiment, as an optional embodiment, the first power supply electrode and the second power supply electrode are mesh metal platinum electrodes; the material of the first measurement electrode and the second measurement electrode is annular silver wire.

Specifically, the stability of the electrode is the most important factor affecting the measurement accuracy. This stability is reflected in the corrosion resistance of the power supply electrode and the non-polarization characteristics of the measurement electrode. Both the corrosion resistance and non-polarization characteristics are determined by the material of the electrode. Decide. The power supply electrode 3 can be a mesh metal platinum electrode. Metal platinum is chemically inert and can maintain a relatively stable state in seawater. The mesh structure can make the injected current form a uniformly distributed electric field in the saltwater. The measuring electrode 8 adopts a ring-shaped silver wire. Before the experimental measurement starts, the silver wire is placed in a sodium chloride solution and energized for several minutes to form a silver chloride film on the surface of the silver wire. Compared with the copper-copper sulfate non-polarization electrode used in the traditional experimental measurement device, the silver-silver chloride electrode in the device provided by the embodiment of the present invention not only has better non-polarization characteristics, but also does not cause damage to the rock sample. Pollution. The silver chloride film will disappear after a long time of measurement. At this time, the silver wire needs to be plated again. This treatment method ensures that the electrode can be recycled.

It should be noted that the chemical properties of the electrode material determine its stability during the measurement process and have a great influence on the induced polarization effect. In the embodiment of the present invention, a non-polarization, anti-oxidation, anti-corrosion and low-pollution material is selected as the electrode, which greatly improves the stability and accuracy of the measurement.

In order to ensure that the measurement is carried out in a stable environment, in addition to the induced polarization effect of the electrode, the following factors in the traditional experimental setup will affect the measurement: (1) there is contact resistance on the contact surface between the rock sample and the measurement electrode; (2) Pore water seeps out from the surface of the rock sample to form a current conduction path; (3) the pore water of the rock sample is continuously volatilized during the measurement process; (4) the two ends of the sulfide rock sample are squeezed during the measurement process, causing damage to the rock structure.

In order to solve these problems, based on the content of the above embodiment, as an optional embodiment, the material of the rock sample sleeve is insulating silicon, so as to wrap the side of the sample of the seabed polymetallic sulfide rock to be measured.

Based on the content of the above embodiments, as an optional embodiment, the device further includes a hose clamp, and the hose clamp is used to clamp the rock sample sleeve, so that the rock sample sleeve can be connected to the seabed polymetallic sulfide to be measured. The samples of the rock fit snugly.

Specifically, in the embodiment of the present invention, insulating silica gel is used to make a rock sample sleeve 10, which wraps the side of the rock sample, and is equipped with a hose clamp 7 for clamping, so as to ensure that the sleeve and the side of the rock sample are tightly fitted, and the volatilization of pore water is avoided. At the same time, the influence of the current path on the surface of the rock sample on the measurement is eliminated. In addition, the measurement electrode and the rock sample are fully coupled through seawater, eliminating the influence of contact resistance. Therefore, the embodiment of the present invention strengthens the sealing of the rock sample, avoids the situation that the rock sample is squeezed, the pore water evaporates, etc., which will affect the measurement accuracy during the measurement process, improves the overall sealing performance of the device, and ensures that the measurement is performed in a stable environment. conduct.

To sum up, compared with the prior art, the device for experimental measurement of electrical parameters of submarine polymetallic sulfide rocks provided by the embodiment of the present invention has at least the following beneficial effects:

Closed micro-grooves are set at both ends of the rock sample sleeve, which can better simulate the seabed environment and help to obtain the electrical parameters of seabed polymetallic sulfide rocks in the in-situ environment;

The measuring electrode and the power supply electrode are separated, the electrode is integrated in the water tank, and the guide rail is arranged outside the device, which not only eliminates the influence of the polarization of the power supply electrode, but also greatly improves the measurement efficiency;

The mesh platinum electrode is designed as the power supply electrode to ensure that the power supply electrode can remain stable in the seawater environment for a long time; the ring-shaped silver-silver chloride electrode is designed as the measuring electrode, which eliminates the influence of the polarization of the measuring electrode on the measurement and avoids the The traditional copper-copper sulfate electrode pollutes the rock sample, while the silver-silver chloride electrode can be reused through regular electroplating, saving costs.

The rock sample sleeve is designed to improve the overall sealing performance of the device. In the device, the two ends of the rock will not be squeezed, which not only protects the physical structure of the rock sample, but also eliminates the influence of the contact resistance on the measurement. In addition, the side of the rock sample is tightly wrapped by the sleeve, which ensures that the pore water is not easily volatilized during the measurement process, and also avoids the formation of redundant current loops on the rock surface.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a many metal sulphide rock electrical parameter experiment measuring device in seabed which characterized in that includes: a micro water tank, a rock sample sleeve and an electrode;

the micro water tank comprises a first micro water tank and a second micro water tank; the first micro water tank and the second micro water tank are respectively arranged at two ends of the rock sample sleeve; the interior of the micro water tank is filled with liquid to simulate a seabed environment;

the inside of the rock sample sleeve is used for containing a sample of seabed polymetallic sulfide rock to be measured, the electrodes comprise a first electrode and a second electrode, and the first electrode and the second electrode are respectively arranged at two ends of the rock sample sleeve.

2. The apparatus of claim 1, wherein the first micro water tank comprises a first chamber and the second micro water tank comprises a second chamber;

the shape of first cavity with the second cavity all with the telescopic shape phase-match of rock specimen, first miniature basin passes through first cavity with the telescopic one end of rock specimen is connected, the miniature basin of second passes through the second cavity with the telescopic other end of rock specimen is connected.

3. The apparatus of claim 2, wherein the first electrode comprises a first supply electrode and a first measurement electrode, and the second electrode comprises a second supply electrode and a second measurement electrode;

the first measuring electrode is arranged in the first cavity, and the first power supply electrode is embedded in one side of the first micro water tank, which is opposite to the first cavity;

the second measuring electrode is arranged in the second cavity, and the second power supply electrode is embedded in one side, opposite to the second cavity, of the second micro water tank.

4. The apparatus of claim 1, further comprising a slide rail, wherein the first micro water tank and the second micro water tank are connected by the slide rail.

5. The apparatus as claimed in claim 1, wherein the first and second micro water tanks are each provided at an upper portion thereof with a liquid injection hole and an air exhaust hole.

6. The apparatus of claim 3, further comprising a first socket and a second socket; the first socket is arranged on the first micro water tank, and the second socket is arranged on the second micro water tank; the first socket is connected with the first power supply electrode and the first measuring electrode, and the second socket is connected with the second power supply electrode and the second measuring electrode.

7. The device of claim 1, wherein the micro water tank is made of plexiglass.

8. The device of claim 3, wherein the first and second powered electrodes are reticulated platinum electrodes; the first measuring electrode and the second measuring electrode are made of annular silver wires.

9. The apparatus of claim 1, wherein the material of the rock sample sleeve is silicon-on-insulator to wrap around the sides of the sample of seafloor polymetallic sulfide rock to be measured.

10. The apparatus of claim 1 or 9, further comprising a hose clamp for clamping the rock sample sleeve to closely conform the rock sample sleeve to the sample of seafloor polymetallic sulfide rock to be measured.

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