CN111855902B - Experimental device and method for simulating in-situ fluidized mining of deep metal ore - Google Patents
Experimental device and method for simulating in-situ fluidized mining of deep metal ore Download PDFInfo
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Abstract
The invention provides an experimental device and method for simulating in-situ fluidized mining of deep metal ores, and belongs to the technical field of deep resource fluidized mining. The device comprises a reflux liquid port, a liquid storage tank, a liquid outlet, a pumping motor, a liquid flowmeter, an electric control airtight valve, a sealing ring, a safety valve, a pressure gauge, a pressure release valve, a reaction tank top cover, an electric heating temperature control layer, a fixing bolt, a sealing washer, a reaction tank body, a liquid injection pipeline, a liquid injection hole, a porous partition plate, a liquid collection curved surface, a liquid collection bin, a pH sensor, an oxidation-reduction potential sensor, an ion concentration sensor, a liquid collection tank, a data centralized control visual terminal, a temperature sensor, an oxygen concentration sensor, a gas pressure sensor, an electric control temperature changer, a gas flowmeter, an O-shaped gas2Storage tank, CO2And (4) storage tank. The invention realizes visual adjustment of temperature and air pressure of the experimental device and measurable and controllable parameters such as pH value, oxidation-reduction potential, ion concentration and the like, and provides reference for a research device and a research method for in-situ fluidization exploitation of deep metal ores.
Description
Technical Field
The invention relates to the technical field of deep-ground resource fluidized mining, in particular to an experimental device and method for simulating in-situ fluidized mining of deep-ground metal ores.
Background
At present, the shallow mineral resources are gradually exhausted, and the development of metal mineral resources gradually enters the deep part in order to relieve the contradiction between supply and demand of the resources. However, the deep mining process faces severe conditions of high ground temperature, high ground pressure and high osmotic pressure, and the traditional underground mining method has the problems of low mining efficiency, poor personnel safety and high operation cost, so that a device and a method suitable for deep mineral resource development and research are urgently sought. The in-situ fluidized mining is a green mining method which injects leaching solution into a deep broken ore bed through a liquid injection pipeline, recovers and extracts leaching pregnant solution to the surface of the earth after mineral leaching reaction, has the outstanding advantages of fluidization, pipelining and intellectualization, and can provide important reference for efficient, green and economic mining of deep metal mineral resources because more than 25% of uranium ores depend on in-situ fluidized mining at present.
Usually, an indoor in-situ fluidization exploitation experimental device is adopted to develop early-stage research and provide data reference for mine exploitation, and the conventional mainstream fluidization exploitation device and method are mainly used for the following five types: 1) the coal fluidization exploitation is mainly suitable for the exploitation of steeply inclined and inclined coal seams and can carry out coal and gas fluidization simultaneous exploitation operation; 2) the uranium ore in-situ leaching is mainly suitable for mining high-permeability sandstone-type or multi-layer sandstone-type uranium ore deposits; 3) in-situ crushing and leaching of metal ores, including in-situ mining of underground sandstone-type copper ores and the like; 4) fluidization leaching of fine minerals such as metal ore tailings, powder ore pulp and the like; 5) the salt deposit is leached in fluidization mode, and hydraulic fracturing, water soluble mining and the like of glauberite deposit, huge thick sylvite deposit and the like are achieved.
However, the existing experimental device and research method have the following bottlenecks: 1) the existing innovative methods are more, but the experimental devices suitable for simulating the deep-ground leaching environment are fewer, the existing complex in-situ fluidization mining method is mostly conceptual, and is suitable for the shallow normal-temperature normal-pressure environment and lacks of hydraulic fracturing and leaching experimental environment simulation for the deep-ground environment; 2) the coal fluidized mining is more and the metal ore is rare, which is mainly because the metal ore rock strength is high, the traditional mining is more dependent on blasting operation for mining, and the metal ore fluidized mining becomes possible along with the continuous innovation and perfection of technologies such as hydraulic mechanical rock breaking and the like; 3) the existing metal ore fluidization mining experimental device is usually suitable for metal ore tailings or powder ore slurry, so that the ore particle size is small, and the experimental research on leaching of large-size ore is difficult to develop; 4) the existing device has low visualization degree and single monitoring parameter, and is difficult to effectively monitor and cooperatively regulate and control multi-phase media such as a temperature field, a pressure field, a seepage field, a solid, gas, liquid and the like in the in-situ leaching process. Therefore, the existing research and method are difficult to effectively satisfy the in-situ fluidization mining research of deep metal ores, still have the defects of experimental devices and methods, and a related innovative device or method is urgently needed to be proposed.
Disclosure of Invention
The invention aims to provide an experimental device and method for simulating in-situ fluidization exploitation of deep metal ores, explore a metal ore in-situ leaching device capable of effectively regulating and controlling pressure and temperature environments, and provide reference for simulating in-situ fluidization exploitation research of the deep metal ores.
The device includes solution spray circulation system, ore leaches reaction system, temperature regulation and control system, atmospheric pressure regulation and control system and data integrated control system, wherein, solution spray circulation system includes the liquid return mouth, the liquid storage pot, the liquid outlet, the pump sending motor, fluidflowmeter, annotate the liquid pipeline, annotate liquid hole and collection liquid jar, ore leaches reaction system and includes the reaction tank top cap, fixing bolt, seal ring, the reaction tank body, porous baffle, converge liquid curved surface and converge the liquid storehouse, temperature regulation and control system includes electric heating temperature control layer and automatically controlled thermoscope, atmospheric pressure regulation and control system includes automatically controlled airtight valve, the seal ring, the relief valve, the pressure gauge, the relief valve, gas flowmeter, O2Storage tank and CO2The storage tank and the data integrated control system comprise a pH sensor, an oxidation-reduction potential sensor, an ion concentration sensor,The device comprises a reaction tank top cover, a reaction tank body, an electric heating temperature control layer, a sealing ring, sealing rings, an electric control airtight valve, three groups of electric control airtight valves, a liquid storage tank and an O pressure sensor, wherein the reaction tank top cover and the reaction tank body are fixedly connected through fixing bolts, the electric heating temperature control layer is arranged inside the reaction tank and is connected and controlled by the electric control temperature changer, the bottom of the reaction tank top cover and the upper part of the reaction tank body are provided with the sealing rings, the sealing rings are matched with the electric control airtight valve to realize the airtight reaction tank body, and the three groups of electric control2Storage tank and CO2The storage tank, the relief valve, the pressure gauge, the relief valve connects gradually, install in reaction tank top cap upper portion, the inside pressure release of reaction cell body is realized in the cooperation, the inside notes liquid pipeline that sets up of reaction cell body, porous baffle, collect liquid curved surface and collect the liquid storehouse, annotate liquid pipeline below and installed porous baffle in proper order, collect liquid curved surface and collect the liquid storehouse, reaction cell body inside side wall installation temperature sensor, oxygen concentration sensor, baroceptor, the bottom has installed pH sensor in collecting the liquid storehouse, redox potential sensor, ion concentration sensor, the visual terminal of data centralized control carries out data acquisition and control to whole device.
The pH sensor, the oxidation-reduction potential sensor and the ion concentration sensor are all located below the liquid level of the liquid collecting bin, and the pressure gauge, the pH sensor, the oxidation-reduction potential sensor, the ion concentration sensor, the temperature sensor, the oxygen concentration sensor and the air pressure sensor are all pressure-resistant and high-temperature-resistant precision sensors.
The top cover of the reaction tank is a cylindrical cover body, and a liquid injection device, a gas injection device and a pressure relief device are arranged on the top cover; the reaction tank body is a cylindrical hollow tank body made of pressure-resistant stainless steel, a liquid injection pipeline is arranged in the reaction tank body, and a liquid injection hole is formed in the liquid injection pipeline.
The liquid injection pipeline is made of pressure-resistant steel pipes and comprises 1 group of vertical liquid injection pipelines and 6 groups of horizontal liquid injection pipelines, and liquid injection holes are uniformly formed in the liquid injection pipelines.
The top cover of the reaction tank is provided with 3 groups of electric control airtight valves, one group is used for sealing the liquid injection pipeline, and the other two groups are used for sealing the liquid from O2Storage tank, CO2Gas of storage tank, wherein the electric control is used for closing liquid injection pipelineThe airtight valve is connected with the liquid storage tank and used for sealing the liquid from the O2Storage tank, CO2And gas flow meters are arranged on pipelines at the front ends of the two groups of electric control airtight valves for the gas in the storage tank.
The upper part of the liquid storage tank is provided with a reflux liquid port, the lower part of the liquid storage tank is provided with a liquid outlet, the reflux liquid port is communicated with the liquid collection tank, the liquid outlet is connected with an electric control airtight valve through a pumping motor, and a liquid flow meter is arranged between the pumping motor and the electric control airtight valve.
The liquid-converging curved surface is an arc-shaped curved surface, the inclination angle of the curved surface is 2-3 degrees, and a circular hole is formed in the center of the bottom of the curved surface and used for solution permeation.
The method applying the invention comprises the following steps:
s1: calibrating a pH sensor, an oxidation-reduction potential sensor and an ion concentration sensor of the reaction tank body by using standard liquid under a standard condition, and cleaning and drying for later use;
s2: connecting a liquid injection pipeline and a top cover of the reaction tank, placing the liquid injection pipeline and the top cover of the reaction tank in the reaction tank body, naturally pouring crushed ores into the reaction tank body for piling, then closing an electric control airtight valve of the top cover of the reaction tank and the reaction tank body, and matching a sealing ring, a fixing bolt and a sealing washer with the closed reaction tank body;
s3: opening a safety valve, a pressure gauge and a pressure relief valve, monitoring by a temperature sensor, matching and adjusting to a target temperature by an electric control temperature changer and an electric heating temperature control layer, monitoring the pressure in the reaction tank body to a standard atmospheric pressure by an air pressure sensor, and closing the safety valve and the pressure relief valve;
s4: mixing O with2Storage tank and CO2O in the storage tank2And CO2Injecting the mixture into a reaction tank body through a pressure release valve, a pumping motor, a gas flowmeter and an electric control airtight valve in sequence, and monitoring to reach target air pressure by matching a pressure gauge and an air pressure sensor;
s5: opening an electric control airtight valve, and pumping the leaching solution in the liquid storage tank into a liquid injection pipeline by matching a pumping motor and a liquid flowmeter, and entering the ore pile through a liquid injection hole;
s6: the leaching solution passes through the porous partition plate, flows through the solution-converging curved surface and the electric control airtight valve, is finally accumulated in the solution-converging bin, and the pH value, the oxidation-reduction potential and the ion concentration parameter are respectively obtained by utilizing a pH sensor, an oxidation-reduction potential sensor and an ion concentration sensor;
s7: closing the upper part of the top cover of the reaction tank, the bottom of the liquid-converging bin and the bottom of the reaction tank body by using a data centralized control visual terminal, and keeping the electric control airtight valve at the lower part of the liquid-converging curved surface open;
s8: sequentially opening a safety valve and a pressure relief valve which are connected with the liquid gathering bin, compressing the leaching liquid into the liquid gathering bin by negative pressure, opening an electric control airtight valve at the bottom of the reaction tank body, enabling the solution to flow into a liquid collecting tank, and finally pumping the solution to a liquid storage tank by a pumping motor to realize closed cycle;
s9: after the experiment is finished, the electric control temperature changer is closed, the safety valve and the pressure release valve which are connected with the reaction tank body are opened to release pressure, and after the environmental air pressure is reached, the fixing bolt is taken down to clean the top cover of the reaction tank and the reaction tank body for next use.
The technical scheme of the invention has the following beneficial effects:
according to the scheme, the pressure and temperature environment of the metal ore in-situ leaching device can be effectively regulated, key parameters such as solution ion concentration, pH value, oxidation-reduction potential and the like can be obtained by means of a pressure-resistant and temperature-resistant high-precision sensor, an effective device and method are provided for deeply disclosing a deep fluidization leaching mechanism, and related devices and methods can provide certain reference for industrial deep metal ore in-situ fluidization leaching.
Drawings
FIG. 1 is a schematic structural diagram of an experimental apparatus according to the present invention;
FIG. 2 is a schematic three-dimensional structure of a key component of the experimental apparatus according to the present invention; wherein, (a) is a three-dimensional structure diagram, (b) is a three-dimensional structure diagram of a liquid injection pipeline, and (c) is a three-dimensional structure diagram of a reaction tank.
Wherein: 1-reflux liquid port, 2-liquid storage tank, 3-liquid outlet, 4-pumping motor, 5-liquid flowmeter, 6-electric control airtight valve, 7-sealing ring, 8-safety valve, 9-pressure gauge, 10-pressure relief valve, 11-reaction tank top cover, 12-electric heating temperature control layer, 13-fixing bolt, 14-sealing ring, 15-reaction tank body, 16-liquid injection pipeline, 17-liquid injection hole, 18-porous partition plate, 19-liquid collection curved surface, 20-liquid collection bin and 21-pH transmissionThe system comprises a sensor, 22-an oxidation-reduction potential sensor, 23-an ion concentration sensor, 24-a liquid collecting tank, 25-a data centralized control visualization terminal, 26-a temperature sensor, 27-an oxygen concentration sensor, 28-a gas pressure sensor, 29-an electric control temperature changer, 30-a gas flowmeter and 31-O2Storage tank, 32-CO2And (4) storage tank.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an experimental device and method for simulating in-situ fluidized mining of deep metal ores.
As shown in fig. 1, the device comprises a solution spraying circulation system, an ore leaching reaction system, a temperature regulation and control system, an air pressure regulation and control system and a data integration control system, wherein the solution spraying circulation system comprises a reflux liquid port 1, a liquid storage tank 2, a liquid outlet 3, a pumping motor 4, a liquid flowmeter 5, a liquid injection pipeline 16, a liquid injection hole 17 and a liquid collection tank 24, the ore leaching reaction system comprises a reaction tank top cover 11, a fixing bolt 13, a sealing gasket 14, a reaction tank body 15, a porous partition plate 18, a liquid collection curved surface 19 and a liquid collection bin 20, the temperature regulation and control system comprises an electric heating temperature control layer 12 and an electric control temperature changer 29, the air pressure regulation and control system comprises an electric control airtight valve 6, a sealing gasket 7, a safety valve 8, a pressure gauge 9, a pressure release2Storage tank 31 and CO2A storage tank 32, a data integration control system comprises a pH sensor 21, an oxidation-reduction potential sensor 22, an ion concentration sensor 23, a data centralized control visual terminal 25, a temperature sensor 26, an oxygen concentration sensor 27 and an air pressure sensor 28, the device comprises a reaction tank top cover 11, a reaction tank body 15 which is connected and fixed by a fixing bolt 13, an electric heating temperature control layer 12 is arranged in the reaction tank body, the electric heating temperature control layer 12 is connected and controlled by an electric temperature changer 29, a sealing gasket 14 is arranged at the bottom of the reaction tank top cover 11 and the upper part of the reaction tank body 15, the lower part of the reaction tank top cover 11 and the upper part of the reaction tank body 15 are respectively provided with a sealing ring 7, the sealing ring 7 is matched with an electric control airtight valve 6 to realize the airtight sealing of the reaction tank body2Storage tank 31 and CO2Storage tank 32, safetyValve 8, pressure gauge 9, relief valve 10 connect gradually, install in 11 upper portions of reaction tank top covers, the cooperation realizes the inside pressure release of reaction tank body 15, reaction tank body 15 is inside to set up annotates liquid pipeline 16, porous partition 18, collect liquid curved surface 19 and collect liquid storehouse 20, annotate liquid pipeline 16 below and install porous partition 18 in proper order, collect liquid curved surface 19 and collect liquid storehouse 20, reaction tank body 15 inside lateral wall installation temperature sensor 26, oxygen concentration sensor 27, baroceptor 28, collect liquid storehouse 20 in the bottom and installed pH sensor 21, redox potential sensor 22, ion concentration sensor 23, the visual terminal 25 of data centralized control carries out data acquisition and control to whole device.
The pH sensor 21, the oxidation-reduction potential sensor 22 and the ion concentration sensor 23 are all positioned below the liquid level of the liquid collecting bin 20, and the pressure gauge 9, the pH sensor 21, the oxidation-reduction potential sensor 22, the ion concentration sensor 23, the temperature sensor 26, the oxygen concentration sensor 27 and the air pressure sensor 28 are all pressure-resistant and high-temperature-resistant precision sensors.
As shown in figure 2(a), the upper part of the reaction tank top cover 11 is provided with a sealing ring 7, the interior is provided with an electric heating temperature control layer 12, the bottom is provided with a sealing washer 14, the edge is provided with a fixing bolt 13, and the reaction tank is connected with an electric control airtight valve 6, a safety valve 8, a pressure gauge 9 and a pressure relief valve 10 by pipelines and is used for injecting solution and O into a reaction tank body 152、CO2And venting pressure.
As shown in fig. 2(b), the liquid injection pipeline 16 includes 1 group of vertical liquid injection pipelines 16 and 6 groups of horizontal liquid injection pipelines 16, and liquid injection holes 17 are uniformly distributed on the liquid injection pipelines.
As shown in fig. 2(c), a liquid-collecting curved surface 19 is arranged below the porous partition plate 18 in the reaction tank body 15, the center of the liquid-collecting curved surface 19 is a circular pore passage for solution leakage, and the lower part is communicated with a liquid-collecting bin 20 through an electrically-controlled airtight valve 6.
The practical application process of the device is as follows:
s1: adjusting the temperature and the pressure to standard conditions (273.15K and 101kPa), calibrating a pH sensor 21, an oxidation-reduction potential sensor 22 and an ion concentration sensor 23 in the reaction tank body 15 by using standard liquid, cleaning and drying the top cover 11 of the reaction tank and the reaction tank body 15 for later use;
s2: a liquid injection pipeline 16 is connected with a top cover 11 of the reaction tank and is arranged in the reaction tank body 15, and according to research requirements, crushed ores with certain particle size distribution are naturally poured into the reaction tank body 15 for ore stacking;
s3: after the building is finished, closing the electric control airtight valve 6 on the reaction tank top cover 11 and the reaction tank body 15, and finishing the sealing of the reaction tank body 15 by utilizing the matching of the sealing ring 7, the fixing bolt 13 and the sealing washer 14;
s4: opening a safety valve 8, a pressure gauge 9 and a pressure relief valve 10, adjusting an electric heating temperature control layer 12 by using an electric control temperature changer 29, monitoring to a target temperature by using a temperature sensor 26, monitoring the pressure in a reaction tank body 15 to a standard atmospheric pressure by using an air pressure sensor 28, and closing the safety valve 8 and the pressure relief valve 10;
s5: according to the proportion required by research, adding O2Storage tank 31 and CO2Oxygen and carbon dioxide in the storage tank 32 sequentially pass through the pressure release valve 10, the pumping motor 4, the gas flowmeter 30 and the electric control airtight valve 6 and are finally injected into the reaction tank body 15, and the pressure gauge 9 and the pressure sensor 28 are used for monitoring the pressure until the target pressure is reached;
s6: setting initial pumping pressure and liquid flow by using a liquid flowmeter 5, opening an electric control airtight valve 6, pumping the leaching solution in a liquid storage tank 2 into a liquid injection pipeline 16 through a pumping motor 4, and entering the interior of the ore pile through a liquid injection hole 17 to participate in leaching reaction;
s7: after the ore leaching reaction is finished, the leaching pregnant solution flows downwards to pass through the porous partition plate 18, finally converges in the solution converging bin 20 through the solution converging curved surface 19 and the lower electric control airtight valve 6, and the pH value, the oxidation-reduction potential and the ion concentration parameters are respectively obtained by utilizing the pH sensor 21, the oxidation-reduction potential sensor 22 and the ion concentration sensor 23;
s8: closing the electric control airtight valves 6 at the upper part of the reaction tank top cover 11, the bottom of the liquid-converging bin 20 and the bottom of the reaction tank body 15 by using the data centralized control visualization terminal 25, and keeping the electric control airtight valve 6 at the lower part of the liquid-converging curved surface 19 open;
s9: sequentially opening a safety valve 8 and a pressure release valve 10 which are connected with a liquid converging bin 20, pressing the leached pregnant solution to flow into the liquid converging bin 20 under the action of negative pressure, then opening an electric control airtight valve 6 at the bottom of a reaction tank body 15 to enable the solution to flow into a liquid collecting tank 24, and finally pumping the solution to a liquid storage tank 2 by a pumping motor 4 to realize closed circulation of the solution;
s10: after the experiment is finished, the electric control temperature changer 29 is closed, the safety valve 8 and the pressure release valve 10 which are connected with the reaction tank body 15 are opened for pressure release, after the environmental air pressure is reached, the fixing bolt 13 is taken down, and the reaction tank top cover 11 and the reaction tank body 15 are cleaned for next use.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides an experimental apparatus of simulation deep metal mine normal position fluidization exploitation which characterized in that: the ore leaching reaction system comprises a solution spraying circulation system, an ore leaching reaction system, a temperature regulation system, an air pressure regulation system and a data integrated control system, wherein the solution spraying circulation system comprises a return liquid port (1), a liquid storage tank (2), a liquid outlet (3), a pumping motor (4), a liquid flow meter (5), a liquid injection pipeline (16), a liquid injection hole (17) and a liquid collection tank (24), the ore leaching reaction system comprises a reaction tank top cover (11), a fixing bolt (13), a sealing washer (14), a reaction tank body (15), a porous partition plate (18), a liquid collection curved surface (19) and a liquid collection bin (20), the temperature regulation system comprises an electric heating temperature control layer (12) and an electric control temperature changer (29), the air pressure regulation system comprises an electric control airtight valve (6), a sealing washer (7), a safety valve (8), a pressure gauge (9), a pressure release valve (10), a gas flow meter, O is2Storage tank (31) and CO2The device comprises a storage tank (32), wherein a data integrated control system comprises a pH sensor (21), an oxidation-reduction potential sensor (22), an ion concentration sensor (23), a data centralized control visual terminal (25), a temperature sensor (26), an oxygen concentration sensor (27) and an air pressure sensor (28), and a reaction tank top cover (11) and a reaction tank body (15) of the device are connected through a fixing bolt (13)Fixedly connected, an electric heating temperature control layer (12) is arranged in the reaction tank, the electric heating temperature control layer (12) is connected and controlled by an electric control temperature changer (29), a sealing gasket (14) is arranged at the bottom of a reaction tank top cover (11) and the upper part of a reaction tank body (15), sealing rings (7) are arranged at the lower part of the reaction tank top cover (11) and the upper part of the reaction tank body (15), the sealing rings (7) are matched with an electric control airtight valve (6) to realize the airtight of the reaction tank body (15), three groups of electric control airtight valves (6) on the reaction tank top cover (11) are arranged and are respectively connected with a liquid storage tank (2) and an2Storage tank (31) and CO2Storage tank (32), reaction tank body (15) bottom and collection liquid storehouse (20) bottom respectively set up an automatically controlled airtight valve, relief valve (8), pressure gauge (9), relief valve (10) connect gradually, install in reaction tank top cap (11) upper portion, the cooperation realizes the inside pressure release of reaction tank body (15), reaction tank body (15) inside sets up annotates liquid pipeline (16), porous partition plate (18), collect liquid curved surface (19) and collection liquid storehouse (20), safety valve and relief valve are connected to collection liquid storehouse (20) side, annotate liquid pipeline (16) below and install porous partition plate (18) in proper order, collect liquid curved surface (19) and collection liquid storehouse (20), reaction tank body (15) inside lateral wall installation temperature sensor (26), oxygen concentration sensor (27), baroceptor (28), the bottom has installed pH sensor (21) in collection liquid storehouse (20), redox potential sensor (22), The ion concentration sensor (23) and the data centralized control visualization terminal (25) are used for carrying out data acquisition and control on the whole device.
2. The experimental facility for simulating in-situ fluidized mining of deep metal ores according to claim 1, wherein: the pH sensor (21), the oxidation-reduction potential sensor (22) and the ion concentration sensor (23) are all located below the liquid level of the liquid collection bin (20), and the pressure gauge (9), the pH sensor (21), the oxidation-reduction potential sensor (22), the ion concentration sensor (23), the temperature sensor (26), the oxygen concentration sensor (27) and the air pressure sensor (28) are pressure-resistant and high-temperature-resistant precision sensors.
3. The experimental facility for simulating in-situ fluidized mining of deep metal ores according to claim 1, wherein: the reaction tank top cover (11) is a cylindrical cover body, and a liquid injection device, a gas injection device and a pressure relief device are arranged on the reaction tank top cover; the reaction tank body (15) is a cylindrical hollow tank body made of pressure-resistant stainless steel, a liquid injection pipeline (16) is arranged in the reaction tank body (15), and a liquid injection hole (17) is formed in the liquid injection pipeline (16).
4. The experimental facility for simulating in-situ fluidized mining of deep metal ores according to claim 3, wherein: the liquid injection pipelines (16) are made of pressure-resistant steel pipes and comprise 1 group of vertical liquid injection pipelines (16) and 6 groups of horizontal liquid injection pipelines (16), and liquid injection holes (17) are uniformly formed in the liquid injection pipelines (16).
5. The experimental facility for simulating in-situ fluidized mining of deep metal ores according to claim 1, wherein: the reaction tank top cover (11) is provided with 3 groups of electric control airtight valves (6), one group is used for sealing the liquid injection pipeline (16), and the other two groups are used for sealing the liquid from O2Storage tank (31), CO2The gas of the storage tank (32), wherein an electrically controlled airtight valve (6) for closing the liquid injection pipeline (16) is connected with the storage tank (2) for closing the gas from the O2Storage tank (31), CO2And a gas flowmeter (30) is arranged on the front end pipeline of the two groups of electric control airtight valves (6) for the gas in the storage tank (32).
6. The experimental facility for simulating in-situ fluidized mining of deep metal ores according to claim 5, wherein: liquid storage pot (2) upper portion sets up return fluid mouth (1), and the lower part sets up liquid outlet (3), return fluid mouth (1) and collection liquid jar (24) intercommunication, and automatically controlled airtight valve (6) are connected through pumping motor (4) in liquid outlet (3), set up fluidflowmeter (5) between pumping motor (4) and the automatically controlled airtight valve (6).
7. The experimental facility for simulating in-situ fluidized mining of deep metal ores according to claim 1, wherein: the liquid-converging curved surface (19) is an arc-shaped curved surface, the inclination angle of the curved surface is 2-3 degrees, and a circular hole is formed in the center of the bottom of the curved surface and used for solution leakage.
8. The method for applying the experimental device for simulating in-situ fluidization exploitation of the deep metal ore in claim 1, is characterized in that: the method comprises the following steps:
s1: under standard conditions, a pH sensor (21), an oxidation-reduction potential sensor (22) and an ion concentration sensor (23) of the reaction tank body (15) are calibrated by using standard liquid, and cleaning and drying are carried out for later use;
s2: connecting a liquid injection pipeline (16) with a reaction tank top cover (11), placing the reaction tank into a reaction tank body (15), naturally pouring crushed ores into the reaction tank body (15) for building, then closing all electric control airtight valves (6) at the bottoms of the reaction tank top cover (11) and the reaction tank body (15), and matching a sealing ring (7), a fixing bolt (13) and a sealing washer (14) with the closed reaction tank body (15);
s3: starting a safety valve (8), a pressure gauge (9) and a pressure relief valve (10) which are connected with the reaction tank body (15), monitoring by a temperature sensor (26), adjusting to a target temperature by matching an electric control temperature changer (29) and an electric heating temperature control layer (12), monitoring the pressure in the reaction tank body (15) to a standard atmospheric pressure by an air pressure sensor (28), and closing the safety valve (8) and the pressure relief valve (10) which are connected with the reaction tank body (15);
s4: mixing O with2Storage tank (31) and CO2O in the storage tank (32)2And CO2The gas is injected into a reaction tank body (15) through a pressure release valve (10), a pumping motor (4), a gas flowmeter (30) and an electric control airtight valve (6) in sequence, and a pressure gauge (9) is matched with a gas pressure sensor (28) to monitor the target gas pressure;
s5: an electric control airtight valve (6) connected with the liquid storage tank (2) above the reaction tank top cover (11) is opened, and the pump motor (4) is matched with the liquid flowmeter (5) to pump the leaching solution in the liquid storage tank (2) into a liquid injection pipeline (16) and enter the ore heap through a liquid injection hole (17);
s6: the leaching solution passes through a porous partition plate (18), flows through a solution converging curved surface (19) and an electric control airtight valve (6), is finally accumulated in a solution converging bin (20), and a pH value, an oxidation-reduction potential and an ion concentration parameter are respectively obtained by utilizing a pH sensor (21), an oxidation-reduction potential sensor (22) and an ion concentration sensor (23);
s7: closing all the electric control airtight valves (6) at the upper part of a reaction tank top cover (11), the bottom of a liquid gathering bin (20) and the bottom of a reaction tank body (15) by using a data centralized control visual terminal (25), and keeping the electric control airtight valves (6) at the lower part of a liquid gathering curved surface (19) open;
s8: a safety valve and a pressure release valve which are connected with the liquid gathering bin (20) are sequentially opened, negative pressure presses the leaching liquid to enter the liquid gathering bin (20), an electric control airtight valve (6) at the bottom of the reaction tank body (15) is opened, the solution flows into a liquid gathering tank (24), and finally the solution is pumped to a liquid storage tank (2) by a pumping motor (4) to realize closed circulation;
s9: after the experiment is finished, the electric control temperature changer (29) is closed, the safety valve (8) and the pressure release valve (10) which are connected with the reaction tank body (15) are opened to release pressure, after the environmental air pressure is reached, the fixing bolt (13) is taken down, and the reaction tank top cover (11) and the reaction tank body (15) are cleaned to be used next time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010599083.6A CN111855902B (en) | 2020-06-28 | 2020-06-28 | Experimental device and method for simulating in-situ fluidized mining of deep metal ore |
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