CN114112861A - Method and device for measuring porosity of ionic rare earth ore - Google Patents
Method and device for measuring porosity of ionic rare earth ore Download PDFInfo
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 69
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000005070 sampling Methods 0.000 claims abstract description 94
- 239000003350 kerosene Substances 0.000 claims abstract description 66
- 239000011148 porous material Substances 0.000 claims abstract description 21
- 238000005303 weighing Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000002386 leaching Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 13
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 11
- 239000002390 adhesive tape Substances 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 6
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- 239000012466 permeate Substances 0.000 claims description 4
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- 239000007788 liquid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 16
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- 238000011065 in-situ storage Methods 0.000 abstract description 8
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
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- 229910052734 helium Inorganic materials 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
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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Abstract
The invention discloses a method and a device for measuring the porosity of ionic rare earth ore, which comprises field sampling and layered sampling by using a sampling pipe; indoor measurement, weighing original mass M1(ii) a Then drying the sample to obtain dry mass M2(ii) a Measuring the length of the sample and the inner diameter of the sampling tube to obtain the volume Q of the sample1(ii) a Adopting kerosene as a medium, and measuring the density of the kerosene by a volume method; naturally permeating kerosene into the sample under atmospheric pressure until the sample is completely soaked in the kerosene; the sample was placed vertically until no kerosene was exuded; weighing the sample soaked in the kerosene to obtain the mass M of the sample soaked in the kerosene3(ii) a Calculating the mass M of kerosene in the pores of rare earth ore3‑M2Then, the volume of kerosene in the pores of the sample was calculated: q is M/0.748g/cm3Finally, calculating the porosity of the sample as Q/Q1X 100%. The invention solves the problem of measuring the in-situ porosity of the rare earth ore on a larger scale, and provides researches such as scientific analysis of theories such as the space porosity change and seepage of the rare earth ore, ore leaching experiments and the likeAccording to the method.
Description
Technical Field
The invention relates to the technical field of rare earth ore porosity measurement, in particular to a method and a device for measuring ionic rare earth ore porosity.
Background
The pore structure and the porosity distribution of the ionic rare earth ore play an important role in leaching seepage, solute transfer, leaching effect and the like of the rare earth ore. The geometrical morphology of pores in the rare earth ore is one of key factors influencing moisture movement and solute migration in the rare earth ore, and the connectivity, pore size and porosity of the pores can directly influence the flow speed and flux distribution uniformity of a soil solution and jointly control the migration of moisture, solute and gas in the rare earth ore.
The porosity of rare earth ore is measured by the following methods: one is to use the traditional "ring knife method" to measure. The method has the greatest advantage of convenient operation, can obtain the porosity of the soil through simple conversion, and is widely applied in field investigation. The method has the defects that the method is greatly influenced by the sampling position, the original water content of the rare earth ore and the like, the sampling range is small, the porosity characteristics of the rare earth mine in a large range are difficult to characterize, and the difference between sample analyses is large.
Secondly, the porosity is calculated by using Nuclear Magnetic Resonance (NMR) or CT scanning and image binary segmentation. The method has the greatest advantage that quantitative research can be carried out, and the pore size, connectivity and spatial distribution characteristics of the test sample can be clearly seen through later-stage image processing. Especially, nuclear magnetic resonance has a resolution of 0.03mm, but its cost is high and sample preparation is complicated, which limits its large-scale application. In addition, the method measurement needs to reasonably estimate the porosity of the sample, and prevents the occurrence of micro pores or non-binary image areas.
The method has important milestone significance for TC scanning or Nuclear Magnetic Resonance (NMR) research on the pore structure, the pore radius and the like of the rare earth ore and gradual weakening of the parameters of the ore body strength after the rare earth ore is leached. However, the samples obtained by the two methods have certain size requirements, and if the samples are subjected to indoor remodeling sample analysis, the samples have certain differences with field in-situ samples. Therefore, the results of measuring the porosity of a sample using a CT scan or Nuclear Magnetic Resonance (NMR) study on a reshaped sample are different from those of an in situ sample.
At present, in addition to the porosity measurement method, the porosity of soil to be measured is calculated by using a microscopic image and a gray scale image of a soil sample through a fitting equation; further, the porosity of the sample is obtained by measuring a change in the gas concentration based on detection of the porosity of soil by a Shape from Shading (SFS-Shape from Shading) algorithm. Whether the method is suitable for measuring the porosity of the ionic rare earth ore is not reported at present.
In the measurement of the porosity of the porous medium, an evaporation tube method, a wax immersion method, an absolute ethyl alcohol-liquid paraffin method and the like are utilized. The core analysis method (SY/T5336-2006) is that for a rock sample with high clay content, the rock sample is put into an oven with the relative humidity of 40% and the drying temperature of 63 ℃ to be dried to constant weight (generally, the drying time is more than 4 hours), and finally helium is injected to measure the effective porosity of the rock sample. The above method is not reported in the porosity measurement of ionic rare earth ore at present. Aiming at the method for measuring the porosity in the porous medium, no good, simple, convenient and representative method is applied to the ionic rare earth ore at present.
Disclosure of Invention
The invention aims to provide a method and a device for measuring the porosity of an ionic rare earth ore, which are used for solving the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a method for measuring the porosity of ionic rare earth ore, which is realized by the following steps:
sampling in the field, namely performing layered sampling on the section of the rare earth ore by using a sampling pipe to obtain a sample;
indoor measurement, weighing the original mass M of the sample and the sampling tube1(ii) a Then drying the sample to obtain the dry mass M of the sample and the sampling tube2(ii) a Measuring the length of the sample and the inner diameter of the sampling tube to obtain the volume Q of the sample1(ii) a Kerosene is used as a medium, and the density of the kerosene is measured by a volume method and is 0.748g/cm3(ii) a Under the condition of vacuum pressure, the kerosene naturally permeates into the sample under the atmospheric pressure until the sample is completely soaked in the kerosene; the sample was placed vertically until no kerosene was exuded; weighing the sample soaked in the kerosene to obtain the mass M of the sample soaked in the kerosene3(ii) a Calculating the mass M of kerosene in the pores of rare earth ore3-M2Then calculating the sampleVolume of kerosene in pores: q is M/0.748g/cm3Finally, calculating the porosity of the sample as Q/Q1×100％。
Preferably, in the field sampling process, the sampling is drilled in the section of the fresh rare earth ore which is excavated in the field and is not subjected to ore leaching.
Preferably, in the drilling and sampling process, when the outer port of the sampling pipe is completely immersed in the rare earth ore and the end face of the sampling pipe is parallel to the excavation platform, ore sand around the sampling pipe is excavated, the sampling pipe is taken out, two sides of the sampling pipe are plugged by tinfoil paper, the sampling pipe is wrapped by tinfoil paper, and the outer side of the sampling pipe is wrapped by transparent adhesive tape again.
Preferably, the tin foil paper and the transparent adhesive tape of the sampling tube for field sampling are removed, and the sampling tube is placed on a balance to be weighed so as to obtain the original mass M of the sample and the sampling tube1。
Preferably, in the process of drying the sample, the sample is placed in an oven, the temperature is set to 63 degrees, and the sample is dried for 6 hours to constant weight so as to obtain the dry mass M of the sample and the sampling tube2。
Preferably, in the process of measuring the length of the sample, the length of the sample in the sampling pipe is measured by a vernier caliper for at least three times in different directions, and the average value is obtained.
An apparatus for measuring porosity of ionic rare earth ore, comprising:
the sampling tube is arranged in the sampling tube, and the top end and the bottom end of the sampling tube are respectively detachably connected with a transparent tube;
the kerosene container is characterized in that a first three-way pipe is communicated between the transparent pipe at the top end and the kerosene container, and the first three-way pipe is communicated with a second three-way pipe through the transparent pipe;
the vacuumizing assembly comprises a vacuum pump, the vacuum pump is connected with a vacuum container through a pipeline, a vacuum pressure gauge is installed on the vacuum container, the vacuum container is communicated with the second three-way pipe, and the second three-way pipe is communicated with the transparent pipe located at the bottom end through a pipeline.
Preferably, a first needle valve is arranged on a pipeline between the vacuum container and the second three-way pipe; a second needle valve is arranged on the transparent pipe between the first three-way pipe and the second three-way pipe; and a third needle valve is arranged at the liquid outlet end of the kerosene container.
Preferably, a sealing ring is arranged between the sampling tube and the transparent tube.
Preferably, the vacuum pump is provided with a switch, an air suction port and an air exhaust port, the air suction port is communicated with the vacuum container through a steel pipe, and the air exhaust port is communicated with the outside air.
The invention discloses the following technical effects:
(1) the invention solves the measurement of the in-situ porosity of the rare earth ore on a larger scale, and provides a basis for scientific analysis of theories such as the space porosity change and seepage of the rare earth ore, ore leaching experiments and other researches.
Due to the current knowledge of the porosity of the ionic rare earth ore, the described sample can be observed and characterized basically by adopting a small laboratory, and some conclusions are also the analysis results of the indoor reconstructed sample. At present, the research conclusion on the porosity of the ionic rare earth ore is directly applied to the rare earth mine with variation characteristics in a large space, and the error is large. According to the method, the in-situ rare earth ore sample is collected in the field for analysis, the sampling length, the sampling diameter, the sampling direction and the like of the sample are different from those of the traditional porosity measurement method, and the change characteristics of the space porosity of the rare earth ore can be clearly reflected by layered sampling and porosity measurement; on the basis of the change of the porosity space, a mathematical model is adopted to calculate the seepage rate, the solute transport rate and the like of the rare earth ore, which provides an important theoretical basis for the in-situ ore leaching process.
(2) According to the invention, kerosene is selected as a medium, two ends of a sample are sealed, and under the condition of vacuum pressure, the porosity of the rare earth ore is calculated through the pores of the kerosene seepage rare earth ore, so that the measurement precision of the porosity is improved.
The main components of the kerosene are organic alkane, aromatic hydrocarbon, unsaturated hydrocarbon, cyclic hydrocarbon and the like, the density of the kerosene is less than that of water, the kerosene does not exchange with metal ions absorbed by clay minerals when permeating into pores of rare earth ores, and the change of the structure of the clay minerals and the subsequent change of the porosity caused by hydration are reduced. The invention adopts kerosene as a medium, can effectively reduce the influence of ion exchange or hydration generated under the action of water, and improves the measurement precision of the porosity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a sampling horizon of a sampling tube in a field sampling process according to the present invention;
FIG. 2 is a schematic structural diagram of the apparatus for measuring porosity of ionic rare earth ore according to the present invention;
wherein, 1 is the sampling pipe, 2 is the hyaline tube, 3 is the kerosene container, 4 is first three-way pipe, 5 is the second three-way pipe, 6 is the vacuum pump, 7 is the vacuum container, 8 is the vacuum pressure gauge, 9 is first needle valve, 10 is the second needle valve, 11 is the third needle valve, 12 is the sealing washer, 13 is the switch, 14 is the extraction opening, 15 is the gas vent.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a method for measuring the porosity of ionic rare earth ore, which is realized by the following steps:
sampling in the field, drilling and sampling in a fresh rare earth ore section which is excavated in the field and is not subjected to ore leaching, wherein the in-situ mechanical property of the rare earth ore can be ensured, the sampling pipe 1 is used for sampling in the rare earth ore section in a layered manner, the sampling layer position is shown in figure 1, so as to obtain a sample, in the drilling and sampling process, when the outer port of the sampling pipe 1 is completely immersed in the rare earth ore and the end surface of the sampling pipe is parallel to an excavation platform, ore sand around the sampling pipe 1 is excavated, the sampling pipe 1 is taken out, two sides of the sampling pipe 1 are blocked by tinfoil paper, the sampling pipe 1 is wrapped by tinfoil paper, the outer side of the sampling pipe 1 is wrapped by transparent adhesive tape again, and the water content of the sampling pipe is ensured to be unchanged;
indoor measurement, preparing indoor measurement analysis instrument and material, including one balance (measuring range 3.0kg, accurate to percentile), vernier caliper, kerosene, etc., removing tinfoil paper and transparent adhesive tape from sampling tube 1 for field sampling, placing on balance, weighing to obtain original mass M of sample and sampling tube 11(ii) a Then, the sample is dried, the sample is placed in a drying oven, the temperature is set to 63 degrees, and the sample is dried for 6 hours to constant weight so as to obtain the dry mass M of the sample and the sampling tube 12(ii) a Measuring the length of the sample and the inner diameter of the sampling tube 1, measuring the length of the sample in the sampling tube 1 by using a vernier caliper in the process of measuring the length of the sample, at least three times in different directions, and calculating the average value to obtain the volume Q of the sample1(ii) a Kerosene is used as a medium, and the density of the kerosene is measured by a volume method and is 0.748g/cm3(ii) a Under the condition of vacuum pressure, the kerosene naturally permeates into the sample under the atmospheric pressure until the sample is completely soaked in the kerosene; the sample was placed vertically until no kerosene was exuded; weighing the sample soaked in the kerosene to obtain the mass M of the sample soaked in the kerosene3(ii) a Calculating the mass M of kerosene in the pores of rare earth ore3-M2Then, the volume of kerosene in the pores of the sample was calculated: q is M/0.748g/cm3Finally, calculating the porosity of the sample as Q/Q1×100％。
An apparatus for measuring the porosity of ionic rare earth ore, see fig. 2, comprising:
the sampling tube 1 is used for arranging a sample in the sampling tube 1, and the top end and the bottom end of the sampling tube 1 are respectively detachably connected with a transparent tube 2;
the kerosene container 3 is characterized in that a first three-way pipe 4 is communicated between the transparent pipe 2 positioned at the top end and the kerosene container 3, and the first three-way pipe 4 is communicated with a second three-way pipe 5 through the transparent pipe 2;
the vacuumizing assembly comprises a vacuum pump 6, the vacuum pump 6 is connected with a vacuum container 7 through a pipeline, a vacuum pressure gauge 8 is installed on the vacuum container 7, the vacuum container 7 is communicated with a second three-way pipe 5, and the second three-way pipe 5 is communicated with the transparent pipe 2 located at the bottom end through a pipeline.
In a further optimized scheme, a first needle valve 9 is arranged on a pipeline between the vacuum container 7 and the second three-way pipe 5; a second needle valve 10 is arranged on the transparent pipe 2 between the first three-way pipe 4 and the second three-way pipe 5; third needle valve 11 is installed to kerosene container 3's play liquid end, and vacuum pump 6 has switch 13, extraction opening 14 and gas vent 15, and extraction opening 14 passes through steel pipe and vacuum container 7 intercommunication, and gas vent 15 intercommunication outside air through opening first needle valve 9, second needle valve 10 and vacuum pump 6, closes third needle valve 11 simultaneously, can carry out the evacuation operation, through closing first needle valve 9, second needle valve 10 and vacuum pump 6, opens third needle valve 11 simultaneously, can inject kerosene.
According to the further optimization scheme, the sealing ring 12 is arranged between the sampling tube 1 and the transparent tube 2, two ends of the sampling tube 1 are sealed, and under the condition of vacuum pressure, the porosity of the rare earth ore is calculated through the pores of the kerosene seepage rare earth ore, so that the porosity measurement precision is improved.
The following is one embodiment of the present invention:
(1) sampling in the field
In order to ensure the in-situ mechanical property of the rare earth ore, a sampling pipe 1 (steel pipe) with the caliber of 80mm and the length of 400mm is used for drilling and sampling in a section of a fresh rare earth ore which is excavated in the field and is not subjected to ore leaching. When the outer port of the steel pipe is completely immersed in the rare earth ore and the section of the steel pipe is parallel to the excavation platform, the ore sand around the steel pipe is excavated, the steel pipe is taken out, two sides of the steel pipe are plugged by tinfoil paper, the steel pipe is wrapped by tinfoil paper, the outer side of the steel pipe is wrapped by transparent adhesive tape again, and the water content of the steel pipe is ensured to be unchanged.
(2) Indoor measurement and analysis
Indoor measurement and analysis instrument and material: one balance (measuring range 3.0kg, accurate to percentile), a vernier caliper, kerosene and the like.
Secondly, removing the wrapped aluminum foil paper, adhesive tape paper and the like from the steel pipe sample collected in the field, placing the steel pipe sample on a balance for weighing to obtain the original mass (including the steel pipe) M of the sample1(g) (ii) a The sample is placed in an oven, the temperature is set at 63 degrees, and the sample is dried for 6 hours to constant weight, so as to obtain the dry mass (containing steel tube) M of the sample2(g)。
Measuring the length of the sample in the steel pipe by using a vernier caliper, at least for more than 3 times in different directions, and calculating an average value; measuring the inner diameter of the steel pipe and calculating the volume Q of the sample1(cm3). Measuring the density of the kerosene by adopting a volume method, wherein the density is 0.748g/cm3。
Putting the sample in the designed device to start measurement
The first step is as follows: and (3) closing the third needle valve 11, opening the first needle valve 9 and the second needle valve 10, opening the vacuum pump 6, vacuumizing for 15 minutes, and displaying-0.095 MPa by the pressure gauge, wherein the reading is stable.
The second step is that: and (3) closing the vacuum pump 6, closing the first needle valve 9 and the second needle valve 10, and opening the third needle valve 11, so that the kerosene naturally permeates into the test sample by depending on the atmospheric pressure.
The third step: observing the transparent tube 2 at the bottom of the sample, and closing the third needle valve 11 when kerosene seeps into the transparent tube 2.
The fourth step: taking out the sample from the device, vertically placing the sample, and standing for 15 minutes; until no kerosene was exuded from the sample.
Fifthly, placing the sample on a balance for weighing to obtain the mass M of the sample soaked in the kerosene3(ii) a Mass M (g) M of kerosene in pores of rare earth ore3-M2。
Sixthly, calculating the volume of kerosene in the pores of the sample: q is M/0.748g/cm3
Seventhly, calculating the porosity (%) of the sample to be Q/Q1×100％。
In this embodiment, the vacuum pump 6 for the laboratory is a fly-over VRD-4, and the air extraction rate is 4m3Per hour, ultimate pressure 5X 10-2pa; the vacuum pressure gauge 8 is preferably a vacuum gauge manufactured by Shanghai Automation instruments, Inc.
The sealing rings 12 on the two sides of the sample are designed specially according to the caliber of a steel pipe; comprises an outer cover (a joint with the aperture of 6mm is reserved), a rubber sealing ring, sealant and the like.
The external diameter of the experimental transparent pipe 2 is 6mm, and the experimental transparent pipe is matched with all three-way pipes.
The density of the kerosene for experiments is measured by adopting a volume method, the specific process is that a certain amount of kerosene with a certain volume is measured and placed on a high-precision balance for weighing, and the density of the kerosene is obtained through calculation.
The experimental balance is preferably a loose precision balance ZG-TP 203.
The porosity of the rare earth ore is measured by the experiment of the invention, and the parameters are shown in the following table:
in the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. The method for measuring the porosity of the ionic rare earth ore is characterized by comprising the following steps of:
sampling in the field, namely performing layered sampling on the section of the rare earth ore by using a sampling tube (1) to obtain a sample;
indoor surveyWeighing the sample and the original mass M of the sampling tube (1)1(ii) a Then drying the sample to obtain the dry mass M of the sample and the sampling tube (1)2(ii) a Measuring the length of the sample and the inner diameter of the sampling tube (1) to obtain the volume Q of the sample1(ii) a Kerosene is used as a medium, and the density of the kerosene is measured by a volume method and is 0.748g/cm3(ii) a Under the condition of vacuum pressure, the kerosene naturally permeates into the sample under the atmospheric pressure until the sample is completely soaked in the kerosene; the sample was placed vertically until no kerosene was exuded; weighing the sample soaked in the kerosene to obtain the mass M of the sample soaked in the kerosene3(ii) a Calculating the mass M of kerosene in the pores of rare earth ore3-M2Then, the volume of kerosene in the pores of the sample was calculated: q is M/0.748g/cm3Finally, calculating the porosity of the sample as Q/Q1×100％。
2. The method for measuring the porosity of ionic rare earth ore according to claim 1, wherein: in the field sampling process, drilling and sampling are carried out in the section of fresh rare earth ore which is excavated in the field and is not subjected to ore leaching.
3. The method for measuring the porosity of ionic rare earth ore according to claim 2, wherein: in the drilling sampling process, when the outer port of the sampling tube (1) is completely immersed in rare earth ore and the end face of the sampling tube is parallel to an excavation platform, ore sand around the sampling tube (1) is excavated, the sampling tube (1) is taken out, the two sides of the sampling tube are plugged by tinfoil paper, the sampling tube (1) is wrapped by the tinfoil paper, and the outer side of the sampling tube (1) is wrapped by transparent adhesive tape again.
4. The method of claim 3, wherein the porosity of the ionic rare earth ore is measured by: removing the tinfoil paper and the transparent adhesive tape from the sampling tube (1) for field sampling, placing the sampling tube (1) on a balance, and weighing to obtain the original mass M of the sample and the sampling tube (1)1。
5. The method for measuring the porosity of ionic rare earth ore according to claim 1, wherein: in the process of drying the sample, the sample is placed in a drying ovenIn the box, the temperature is set at 63 degrees, and the sample is dried for 6 hours to constant weight so as to obtain the dry mass M of the sample and the sampling tube (1)2。
6. The method for measuring the porosity of ionic rare earth ore according to claim 1, wherein: in the process of measuring the length of the sample, the length of the sample in the sampling tube (1) is measured by a vernier caliper for more than three times in at least different directions, and the average value is calculated.
7. The ionic rare earth ore porosity measuring device is based on the ionic rare earth ore porosity measuring method of claim 1, and is characterized by comprising the following steps:
the sampling tube (1), the sample is set up in the said sampling tube (1), the top and bottom of the said sampling tube (1) connect with the transparent tube (2) removably respectively;
the kerosene container (3), the transparent pipe (2) positioned at the top end is communicated with the kerosene container (3) through a first three-way pipe (4), and the first three-way pipe (4) is communicated with a second three-way pipe (5) through the transparent pipe (2);
the vacuumizing assembly comprises a vacuum pump (6), the vacuum pump (6) is connected with a vacuum container (7) through a pipeline, a vacuum pressure gauge (8) is installed on the vacuum container (7), the vacuum container (7) is communicated with the second three-way pipe (5), and the second three-way pipe (5) is communicated with the transparent pipe (2) located at the bottom end through a pipeline.
8. The apparatus for measuring porosity of ionic rare earth ore according to claim 7, wherein: a first needle valve (9) is arranged on a pipeline between the vacuum container (7) and the second three-way pipe (5); a second needle valve (10) is arranged on the transparent pipe (2) between the first three-way pipe (4) and the second three-way pipe (5); and a third needle valve (11) is arranged at the liquid outlet end of the kerosene container (3).
9. The apparatus for measuring porosity of ionic rare earth ore according to claim 7, wherein: and a sealing ring (12) is arranged between the sampling tube (1) and the transparent tube (2).
10. The apparatus for measuring porosity of ionic rare earth ore according to claim 7, wherein: the vacuum pump (6) is provided with a switch (13), an air suction port (14) and an exhaust port (15), the air suction port (14) is communicated with the vacuum container (7) through a steel pipe, and the exhaust port (15) is communicated with the outside air.
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