CN111157423A - In-situ real-time representation device and method for liquid holdup of ore heap - Google Patents
In-situ real-time representation device and method for liquid holdup of ore heap Download PDFInfo
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- CN111157423A CN111157423A CN202010007939.6A CN202010007939A CN111157423A CN 111157423 A CN111157423 A CN 111157423A CN 202010007939 A CN202010007939 A CN 202010007939A CN 111157423 A CN111157423 A CN 111157423A
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- 239000007788 liquid Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 54
- 239000002253 acid Substances 0.000 claims abstract description 46
- 238000002386 leaching Methods 0.000 claims abstract description 37
- 238000003860 storage Methods 0.000 claims abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000012512 characterization method Methods 0.000 claims abstract description 11
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- 229910000431 copper oxide Inorganic materials 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical group [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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Abstract
The invention provides an in-situ real-time representation device and method for the liquid holdup of an ore heap, and belongs to the technical field of monitoring of the liquid holdup of a heap leaching system. The device comprises a tension sensor, a force measuring instrument, an acid-resistant organic glass column, a porous partition sieve, a water outlet, a flow guide bent pipe, a double-layer flow guide plate, a flow guide straight pipe, a liquid collection tank, a peristaltic pump, a liquid storage tank, a LabView real-time digital display system, a dissolved oxygen sensor, a pH sensor, a threaded lead screw, a fixing bolt, a stabilizing plate and a connecting plate. The double-layer guide plate, the acid-resistant organic glass column and the connecting plate are fixed by the threaded screw rod and the fixing bolt; the upper end of the tension sensor is connected with the stable plate, and the lower end of the tension sensor is fixed with the connecting plate; the diversion bent pipe is sleeved outside the diversion straight pipe for sealing. The device has simple structure and simple and convenient operation, realizes the undisturbed, long-acting and real-time in-situ characterization of the liquid holdup of the ore heap in the leaching process, and provides reference for monitoring the liquid holdup of the industrial heap.
Description
Technical Field
The invention relates to the technical field of monitoring of liquid holdup of heap leaching systems, in particular to a device and a method for in-situ real-time characterization of the liquid holdup of an ore heap.
Background
The heap leaching technology is characterized in that leaching solution is sprayed on the top of an ore bulk heap, and the heap leaching solution is widely applied to mining strategic metal mineral resources such as low-grade secondary copper sulfide ore, copper oxide ore, laterite-nickel ore, uranium ore and the like by virtue of the outstanding advantages of low capital construction cost and high leaching efficiency. For heap leaching of ore piles, leaching solution is an important medium for reactive ions, water-soluble oxygen, bacteria, reaction heat and the like; however, the heap is a non-saturated leaching system, i.e.: and simultaneously, gas, solid and liquid three-phase media exist. Therefore, the liquid holding behavior of the ore heap is extremely complex and difficult to predict, the reaction kinetics, the mass transfer, the oxygen transfer and the heat transfer processes and the leaching rate of valuable metals in the ore leaching process are directly influenced, the heap surface preferential flow and the leaching blind area are easily formed, and the strengthening and the valuable metal ion recovery in the ore heap leaching process are greatly restricted. Therefore, monitoring of the liquid retention behavior of the ore heap becomes one of the focuses of the attention of the seepage rule of the ore heap at home and abroad, and is also the key for realizing the regulation and control of the ore leaching process.
Currently, the liquid holdup is generally used to quantitatively characterize the liquid holdup behavior of a mine pile. The domestic and foreign research on the liquid holdup of the heap leaching system mostly focuses on the following two categories: firstly, directly inserting probe-type testing devices such as a liquid holdup sensor into an ore particle pile, monitoring the change of solution amount at different positions in the pile, combining numerical simulation software, performing interpolation and developing liquid holdup simulation, and the method has the advantages that the in-situ monitoring of the liquid holdup can be realized; and secondly, scanning the water-containing discrete particle pile by using a computer tomography scanning technology, a particle image speed measurement and other non-disturbance scanning methods to obtain the instantaneous liquid holding characteristic of the ore pile.
However, there are two main types of methods that have the following four problems: 1) the testing method represented by computed tomography technology and the like is considered to be an effective instantaneous and short-time measuring technology, and the leaching process of the heap leaching system usually lasts for one month or even several months. Therefore, long-term monitoring of liquid holdup is difficult to achieve; 2) the testing method of the sensor inserted in the ore heap can realize the in-situ monitoring of the liquid holding behavior, but generates obvious disturbance to the internal flow field of the ore heap, thereby greatly influencing the accuracy of the research result; 3) the accuracy of the interpolation type sensor is limited, for a probe type sensor directly inserted into the ore heap, the test area is easy to be overlapped or omitted, the range of the probe type sensor is difficult to be effectively identified by the existing method, and the liquid holding condition of the whole ore heap cannot be monitored; 4) the monitoring cost is high. For monitoring the liquid holdup of a discrete ore pile, several or even dozens of sensors are usually needed, and if a computed tomography technology is adopted for continuous scanning, the economic cost is too high, and the method is not suitable for industrial and laboratory research. Therefore, for the liquid holdup of the ore heap, an in-situ monitoring method with no disturbance, long acting and real time is still lacked, and the problem of 'black box' that the liquid holdup is unclear in the leaching process of the ore heap is difficult to solve.
Disclosure of Invention
The invention provides a device and a method for in-situ real-time characterization of liquid holdup of a mine pile, explores an effective method for dynamically associating a tension sensor, a force measuring instrument and a LabView real-time digital display system, and can be finally applied to real-time in-situ monitoring of the actual liquid holdup of the mine pile.
The device comprises a suspension force measuring system, a spraying circulating system, a real-time digital display system and a supporting and fixing system, wherein the suspension force measuring system comprises a tension sensor, a force measuring instrument, an acid-resistant organic glass column, a porous partition sieve and a water outlet; the upper end of the tension sensor is fixedly connected with the stabilizing plate by the matching of the threaded lead screw and the fixing bolt, the lower end of the tension sensor is fixedly connected with the connecting plate by the matching of the threaded lead screw and the fixing bolt, the electric signal of the tension sensor is transmitted to the force measuring instrument, the force measuring instrument is connected with the LabView real-time digital display system, a double-layer guide plate is arranged below the connecting plate, an acid-resistant organic glass column and the double-layer guide plate are arranged below the double-layer, the acid-resistant organic glass column is fixedly connected with the connecting plate through the matching of a threaded lead screw and a fixing bolt, the lower portion in the acid-resistant organic glass column is provided with a porous partition sieve, a water outlet is reserved at the bottom of the acid-resistant organic glass column, a liquid collection tank is arranged right below the water outlet, a dissolved oxygen sensor and a pH sensor are arranged at the bottom of the liquid collection tank, the liquid collection tank is connected with a liquid storage tank through a peristaltic pump, the liquid storage tank is connected with a diversion bent pipe, and the dissolved oxygen sensor and the pH sensor are connected with.
Wherein, acid-resistant organic glass post is the cylindrical organic glass post of upper end open-ended.
The double-layer guide plate is uniformly inserted with the guide straight pipe, the lower end opening of the guide bent pipe is sleeved above the guide straight pipe to realize airtight connection, and the upper end opening of the guide bent pipe is immersed in the leaching liquid of the liquid storage tank.
The diversion elbows are acid-resistant rubber hoses and are arranged in 5 groups, and each group is provided with 1 opening at the upper end and 8 openings at the lower end; the double-layer guide plate is a round organic glass plate, and round holes are uniformly distributed on the double-layer guide plate, and the total number of the round holes is 40; the flow guide straight pipe is a hard cylindrical organic glass pipe with openings at two ends.
The spraying circulation system is a closed circulation, the leaching solution in the liquid storage tank enters the diversion elbow pipe to realize solution diversion under the pumping action of the peristaltic pump, and the leaching solution uniformly and vertically falls into the acid-resistant organic glass column through the diversion straight pipe between the double-layer diversion plates.
The method for applying the device comprises the following steps:
s1: before the test is started, liquid in the acid-resistant organic glass column is emptied, dried and kept stand to ambient temperature, and bulk particles such as ores are poured into the acid-resistant organic glass column from an opening at the upper end of the acid-resistant organic glass column to complete particle stacking in the acid-resistant organic glass column;
s2: fixedly connecting a stabilizing plate, a tension sensor, a connecting plate and a double-layer guide plate by using a threaded lead screw and a fixing bolt, adjusting the distance from a guide straight pipe to the upper end of an acid-resistant organic glass column, and calibrating and resetting a force measuring instrument and a LabView real-time digital display system;
s3: setting the spraying strength of a peristaltic pump and starting the peristaltic pump, uniformly dripping the leaching solution in the liquid storage tank into the acid-resistant organic glass column through the diversion bent pipe, the double-layer diversion plate and the diversion straight pipe, penetrating the leaching solution through the particle pile, discharging the acid-resistant organic glass column through the porous partition sieve and the water outlet, and feeding the acid-resistant organic glass column into a liquid collection tank;
s4: after the peristaltic pump is started, the liquid holdup of the acid-resistant organic glass column begins to increase, a tension signal is captured by the tension sensor to generate an electric signal, the electric signal is processed by the dynamometer and transmitted to the LabView real-time digital display system, and the dissolved oxygen concentration measured by the dissolved oxygen sensor and the pH value of the solution measured by the pH sensor realize data display and recording through the LabView real-time digital display system.
The technical scheme of the invention has the following beneficial effects:
in the scheme, the monitoring of the liquid holdup of the unsaturated ore heap in a static state and in a dynamic state in the leaching process can be realized, and an effective research device and method are provided for deeply disclosing a correlation mechanism between the liquid holdup of the ore heap and the leaching efficiency. The device and the method for monitoring the liquid holdup of the ore heap have the outstanding advantages of high visualization degree, strong operability, low equipment cost and the like, can realize real-time, long-acting and accurate monitoring of the whole liquid holdup of the ore heap, and provide good reference for monitoring the liquid holdup of an industrial heap leaching system and strengthening a leaching process.
Drawings
FIG. 1 is a schematic structural diagram of an in-situ real-time characterization device for liquid holdup of a mine pile according to the present invention;
fig. 2 is a schematic structural diagram of a spray circulation system in the in-situ real-time characterization device for liquid holdup of a mine pile, wherein (a) is a front view and (b) is a top view.
Wherein: 1-a threaded lead screw; 2-fixing the bolt; 3-a stabilizing plate; 4-a tension sensor; 5-a dynamometer; 6-connecting plates; 7-LabView real-time digital display system; 8-diversion bend pipe; 9-double layer flow guide plate; 10-diversion straight pipe; 11-acid resistant plexiglas column; 12-porous partition sieve; 13-a water outlet; 14-dissolved oxygen sensor; 15-a pH sensor; 16-a liquid collection tank; 17-a peristaltic pump; 18-a liquid 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 in-situ real-time representation device and method for the liquid holdup of a mine pile.
As shown in fig. 1, the device comprises a suspension force measuring system, a spraying circulating system, a real-time digital display system and a supporting and fixing system, wherein the suspension force measuring system comprises a tension sensor 4, a force measuring instrument 5, an acid-resistant organic glass column 11, a porous partition sieve 12 and a water outlet 13, the spraying circulating system comprises a diversion elbow 8, a double-layer diversion plate 9, a diversion straight pipe 10, a liquid collecting tank 16, a peristaltic pump 17 and a liquid storage tank 18, the real-time digital display system comprises a LabView real-time digital display system 7, a dissolved oxygen sensor 14 and a pH sensor 15, and the supporting and fixing system comprises a threaded lead screw 1, a fixing bolt 2, a stabilizing plate 3 and; the upper end of a tension sensor 4 is fixedly connected with a stabilizing plate 3 by the matching of a threaded lead screw 1 and a fixing bolt 2, the lower end of the tension sensor 4 is fixedly connected with a connecting plate 6 by the matching of the threaded lead screw 1 and the fixing bolt 2, the electric signal of the tension sensor 4 is transmitted to a force measuring instrument 5, the force measuring instrument 5 is connected with a LabView real-time digital display system 7, a double-layer guide plate 9 is arranged below the connecting plate 6, an acid-proof organic glass column 11 is arranged below the double-layer guide plate 9, the double-layer guide plate 9 and the acid-proof organic glass column 11 are fixedly connected with the connecting plate 6 by the matching of the threaded lead screw and the fixing bolt, a porous partition sieve 12 is arranged at the lower part in the acid-proof organic glass column 11, a water outlet 13 is reserved at the bottom of the acid-proof organic glass column 11, a liquid collection tank 16, the liquid storage tank 18 is connected with the diversion elbow 8, and the dissolved oxygen sensor 14 and the pH sensor 15 are connected with the LabView real-time digital display system 7.
As shown in fig. 2, 5 sets of the diversion elbows 8 are provided, and each set has 1 upper end opening and 8 lower end openings. Wherein, the lower end opening is hermetically connected with the diversion straight pipe 10, the upper end opening is inserted into the liquid storage tank 18 at the top, the liquid storage tank is immersed below the leaching liquid level, and the leaching liquid can be pumped to the top of the ore pile in the acid-resistant organic glass column 11 through the diversion bent pipe 8, the double-layer diversion plate 9 and the diversion straight pipe 10 in sequence by the peristaltic pump 17.
The practical application process of the device is as follows:
s1: and constructing a suspension force measuring system. Utilize threaded lead screw 1 and fixing bolt 2, fix double-deck guide plate 9, acidproof organic glass post 11 and connecting plate 6, tension sensor 4 upper end is connected with firm board 3 through threaded lead screw 1, and the lower extreme is fixed with connecting plate 6 through threaded lead screw 1.
S2: the suspension force measurement system is pre-conditioned. Before spraying begins, liquid in the acid-resistant organic glass column 11 is emptied, the drying and the standing are carried out to the ambient temperature, the ore and other bulk particles are poured into the acid-resistant organic glass column 11 from the upper end opening, and the particle piling in the acid-resistant organic glass column 11 is completed.
S3: and (5) constructing a spraying circulation system. Above the double-layer guide plate 9, the guide bent pipe 8 is sleeved outside the guide straight pipe 10 for connection and sealing. Utilize threaded lead screw 1 and fixing bolt 2, will stabilize board 3, tension sensor 4, connecting plate 6, double-deck guide plate 9 and will carry out fixed connection, avoid the shower direction not vertical to lead to the dropping liquid irregular, get rid of "limit wall effect", promptly: the leaching solution is transmitted downwards along the wall surface, so that the accuracy of the liquid holdup data is ensured; and the distance from the flow guide straight pipe 10 to the upper end of the acid-resistant organic glass column 11 is adjusted to ensure proper height.
S4: and (5) calibrating the real-time digital display system. And (5) after S1-S3 are finished, standing and stabilizing the device, adjusting the force measuring instrument 5 and the LabView real-time digital display system 7, calibrating and clearing.
S5: and setting and starting a spraying environment. The initial spraying intensity of the peristaltic pump 17 is set and started, the leaching solution in the liquid storage tank 18 uniformly drops into the acid-resistant organic glass column 11 through the diversion bent pipe 8, the double-layer diversion plate 9 and the diversion straight pipe 10, penetrates through the particle pile, is discharged out of the acid-resistant organic glass column 11 through the porous partition sieve 12 and the water outlet 13, and enters the liquid collection tank 16 at the bottom.
S6: and (4) capturing a liquid holdup signal in real time and monitoring the leaching process. After the peristaltic pump 17 is started, the liquid holdup of the acid-resistant organic glass column 11 starts to increase, a tension signal is captured by the tension sensor 4 to generate an electric signal, the electric signal is transmitted to the LabView real-time digital display system 7 after being processed by the dynamometer 5, the dissolved oxygen concentration measured by the dissolved oxygen sensor 14 and the pH value of the solution measured by the pH sensor 15 are displayed and recorded in real time through the LabView real-time digital display system 7.
S7: after the monitoring research is finished, the peristaltic pump is closed, the fixing bolt is adjusted, the suspension device is taken down, and the acid-resistant organic glass column is emptied of ore particles and cleaned for subsequent recycling.
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 (6)
1. The utility model provides a real-time characterization device of ore deposit liquid holdup normal position which characterized in that: the system comprises a suspension force measuring system, a spraying circulating system, a real-time digital display system and a supporting and fixing system, wherein the suspension force measuring system comprises a tension sensor (4), a force measuring instrument (5), an acid-resistant organic glass column (11), a porous partition sieve (12) and a water outlet (13), the spraying circulating system comprises a diversion elbow (8), a double-layer diversion plate (9), a diversion straight pipe (10), a liquid collection tank (16), a peristaltic pump (17) and a liquid storage tank (18), the real-time digital display system comprises a LabView real-time digital display system (7), a dissolved oxygen sensor (14) and a pH sensor (15), and the supporting and fixing system comprises a threaded lead screw (1), a fixing bolt (2), a stabilizing plate (3) and a; the upper end of a tension sensor (4) is fixedly connected with a stabilizing plate (3) by matching a threaded lead screw (1) with a fixing bolt (2), the lower end of the tension sensor (4) is fixedly connected with a connecting plate (6) by matching the threaded lead screw (1) with the fixing bolt (2), an electric signal of the tension sensor (4) is transmitted to a force measuring instrument (5), the force measuring instrument (5) is connected with a LabView real-time digital display system (7), a double-layer guide plate (9) is arranged below the connecting plate (6), an acid-resistant organic glass column (11) is arranged below the double-layer guide plate (9), the acid-resistant organic glass column (11) is fixedly connected with the connecting plate (6) by matching the threaded lead screw and the fixing bolt, a porous partition sieve (12) is arranged at the inner lower part of the acid-resistant organic glass column (11), a water outlet (13) is reserved at the bottom of the acid-resistant organic glass column (11, the bottom of the liquid collection tank (16) is provided with a dissolved oxygen sensor (14) and a pH sensor (15), the liquid collection tank (16) is connected with a liquid storage tank (18) through a peristaltic pump (17), the liquid storage tank (18) is connected with a diversion elbow (8), and the dissolved oxygen sensor (14) and the pH sensor (15) are connected with a LabView real-time digital display system (7).
2. The in-situ real-time characterization device of liquid holdup of a mine pile according to claim 1, wherein: the acid-resistant organic glass column (11) is a cylindrical organic glass column with an opening at the upper end.
3. The in-situ real-time characterization device of liquid holdup of a mine pile according to claim 1, wherein: evenly insert water conservancy diversion straight tube (10) on double-deck guide plate (9), the lower extreme opening of water conservancy diversion return bend (8) is cup jointed to water conservancy diversion straight tube (10) top, and water conservancy diversion return bend (8) upper end opening submergence is in liquid storage pot (18) immersion liquid.
4. The in-situ real-time characterization device of liquid holdup of a mine pile according to claim 3, wherein: the diversion elbow pipes (8) are acid-resistant rubber hoses and are provided with 5 groups, and each group is provided with 1 opening at the upper end and 8 openings at the lower end; the double-layer guide plates (9) are round organic glass plates, and round holes are uniformly distributed on the double-layer guide plates (9), and the total number of the round holes is 40; the flow guide straight pipe (10) is a hard cylindrical organic glass pipe with openings at two ends.
5. The in-situ real-time characterization device of liquid holdup of a mine pile according to claim 1, wherein: the spraying circulation system is a closed circulation, the leaching solution in the liquid storage tank (18) enters the diversion elbow (8) to realize solution diversion under the pumping action of the peristaltic pump (17), and the leaching solution uniformly and vertically falls into the acid-resistant organic glass column (11) through the diversion straight pipe (10) between the double-layer diversion plates (9).
6. The method for in-situ real-time characterization of the liquid holdup of a mine pile according to claim 1, characterized in that: the method comprises the following steps:
s1: before the test is started, liquid in the acid-resistant organic glass column (11) is emptied, dried and stood to ambient temperature, and the discrete particles are poured into the acid-resistant organic glass column (11) from the upper end opening of the acid-resistant organic glass column to complete the particle stacking in the acid-resistant organic glass column (11);
s2: fixedly connecting a stabilizing plate (3), a tension sensor (4), a connecting plate (6) and a double-layer guide plate (9) by using a threaded lead screw (1) and a fixing bolt (2), adjusting the distance from a guide straight pipe (10) to the upper end of an acid-resistant organic glass column (11), and calibrating and resetting a force measuring instrument (5) and a LabView real-time digital display system (7);
s3: setting the spraying intensity of a peristaltic pump (17) and starting, uniformly dripping the leaching solution in a liquid storage tank (18) into an acid-resistant organic glass column (11) through a diversion bent pipe (8), a double-layer diversion plate (9) and a diversion straight pipe (10), penetrating through a particle pile, discharging the leaching solution out of the acid-resistant organic glass column (11) through a porous partition sieve (12) and a water outlet (13), and entering a liquid collection tank (16);
s4: after the peristaltic pump (17) is started, the liquid holdup of the acid-resistant organic glass column (11) begins to increase, a tension signal is captured by the tension sensor (4) to generate an electric signal, the electric signal is processed by the dynamometer (5) and transmitted to the LabView real-time digital display system (7), and the data display and recording of the dissolved oxygen concentration measured by the dissolved oxygen sensor (14) and the pH value of the solution measured by the pH sensor (15) are realized by the LabView real-time digital display system (7).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111826520A (en) * | 2020-06-28 | 2020-10-27 | 北京科技大学 | Experimental device and method for reinforcing copper sulfide ore leaching by using seawater-based solution |
| CN111855902A (en) * | 2020-06-28 | 2020-10-30 | 北京科技大学 | Experimental device and method for simulating in-situ fluidized mining of deep metal ore |
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