CN115389605B - Method for rapidly evaluating ion adsorption type rare earth mine re-irrigation area resources - Google Patents
Method for rapidly evaluating ion adsorption type rare earth mine re-irrigation area resources Download PDFInfo
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- CN115389605B CN115389605B CN202211017065.8A CN202211017065A CN115389605B CN 115389605 B CN115389605 B CN 115389605B CN 202211017065 A CN202211017065 A CN 202211017065A CN 115389605 B CN115389605 B CN 115389605B
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 52
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 20
- 238000003973 irrigation Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 25
- 239000007924 injection Substances 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000005065 mining Methods 0.000 claims abstract description 23
- 238000004458 analytical method Methods 0.000 claims abstract description 21
- 238000005070 sampling Methods 0.000 claims abstract description 19
- 230000000007 visual effect Effects 0.000 claims abstract description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 9
- 239000011707 mineral Substances 0.000 claims abstract description 9
- 238000011835 investigation Methods 0.000 claims abstract description 8
- 238000004949 mass spectrometry Methods 0.000 claims abstract description 8
- 238000011156 evaluation Methods 0.000 claims abstract description 6
- 238000012876 topography Methods 0.000 claims abstract description 6
- 239000011435 rock Substances 0.000 claims abstract description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 28
- 239000000243 solution Substances 0.000 claims description 19
- 150000002500 ions Chemical class 0.000 claims description 16
- 210000003128 head Anatomy 0.000 claims description 14
- 238000002386 leaching Methods 0.000 claims description 11
- 235000006408 oxalic acid Nutrition 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 10
- 238000011065 in-situ storage Methods 0.000 claims description 7
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003153 chemical reaction reagent Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000012047 saturated solution Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- -1 oxalic acid rare earth Chemical class 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 2
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 2
- 239000012153 distilled water Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000009616 inductively coupled plasma Methods 0.000 claims description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 238000002513 implantation Methods 0.000 claims 1
- 238000010998 test method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000013049 sediment Substances 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
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/626—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using heat to ionise a gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
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- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
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Abstract
The invention discloses a method for rapidly evaluating resources of ion adsorption type rare earth mine re-irrigation areas, which comprises the following steps: s1, investigating the mining condition, and enclosing the range of a re-irrigation area; s2, preferentially selecting the upper part of the middle part of the mountain waist of the mountain according to the topography and topography characteristics of the re-irrigated area, and deploying a mineral exploration project between the existing liquid injection projects; s3, carrying out continuous sampling analysis on the rock cores disclosed by the exploratory engineering from top to bottom in sequence; s4, determining a deployment scheme of the next prospecting project according to a sample analysis result, and when the overall visual estimation grade of the sample is lower, not deploying the prospecting project around any more, otherwise, uniformly distributing the prospecting project according to the degree of network in a detailed investigation or exploration stage; s5, collecting a sample with higher visual estimation grade in the exploratory engineering, and sending the sample to a laboratory for mass spectrometry; s6, delineating residual ore bodies with exploitation values according to mass spectrometry analysis test results, and estimating the resource quantity. The invention can provide feasibility demonstration for the resource investigation and evaluation of ion adsorption type rare earth mine re-irrigation areas.
Description
Technical Field
The invention belongs to the field of geological mineral exploration, and particularly relates to a method for rapidly evaluating resources of ion adsorption type rare earth mine re-irrigation areas.
Background
Ion adsorption type rare earth ore refers to rare earth ore with rare earth elements in exchangeable adsorption state cations stored in a weathering crust, and is mainly mined by an in-situ leaching process at present. Mining practices find that the ore deposit still has re-mining value after mining for years, and taking Jiangxi foot holes as an example, the ore area sequentially adopts pool leaching, heap leaching and in-situ leaching mining processes, the in-situ leaching mining blocks adopted in the ore area undergo one to three different mining histories, and most mines have re-filling value. Therefore, under the condition that the residual resources are unknown after the ion adsorption type rare earth mine in-situ leaching mining, the investigation and evaluation of mine re-filling area resources are necessary to be carried out, and important references are provided for the detailed definition of the residual resource conditions of different areas in the mining area, reasonable selection of re-filling areas and unnecessary mining investment avoidance.
Disclosure of Invention
The invention aims to provide a method for rapidly evaluating resources of ion adsorption type rare earth mine re-irrigation areas, which is suitable for evaluating the resources of the ion adsorption type rare earth mine re-irrigation areas, provides feasibility demonstration for evaluating the resources of the re-irrigation areas, and provides a feasibility path for improving the recovery rate of the rare earth resources and guaranteeing the full utilization of the rare earth resources.
In order to solve the technical problems, the technical scheme of the invention is as follows: a method for rapidly evaluating resources of ion adsorption type rare earth mine re-irrigation areas comprises the following steps:
S1, investigating the mining condition, and enclosing the range of a re-irrigation area;
s2, preferentially selecting the upper part of the middle part of the mountain waist of the mountain according to the topography and topography characteristics of the re-irrigated area, and deploying a mineral exploration project between the existing liquid injection projects;
S3, continuously sampling the rock cores disclosed by the exploratory engineering from top to bottom in sequence;
S4, performing an outdoor rapid analysis test on the sample collected in the S3 to obtain a sample analysis result, and primarily screening the rare earth mineral content of the sample;
S5, determining a deployment scheme of the next exploratory engineering according to the analysis result of the sample in the S4: when the overall visual estimation grade of the sample is lower than a preset grade threshold, the mountain head where the prospecting project is located in the S2 is regarded as not having the recharging value, and the prospecting project is not deployed; when the overall visual estimation grade of the sample is higher than or equal to a preset grade threshold value, uniformly distributing the prospecting engineering around the mountain head where the prospecting engineering is located in the S2 according to the degree of the detailed investigation or exploration stage;
S6, conveying the sample with the visual estimation grade higher than a preset grade threshold value in the mineral exploration engineering in the S5 to a laboratory for mass spectrometry test;
s7, delineating residual ore bodies with exploitation values according to mass spectrometry analysis test results, and estimating the resource quantity.
According to the scheme, the mining conditions in the step S1 comprise whether a liquid injection project exists, the specification of a liquid injection well, the distance between the liquid injection wells, a high-level reservoir, a liquid injection pipeline and the like.
According to the scheme, the purpose of deploying the prospecting project among the existing liquid injection projects in the step S2 is to control the mineral leaching blind areas which occur due to the fact that the liquid injection well spacing is large.
According to the above scheme, the sampling method in S3 is as follows: continuously sampling the well detection by adopting a grooving method, wherein the cross section of a sample groove is generally 5cm multiplied by 3cm; sampling a Gannan drill core sample by a shrinkage method; shallow drilling a core sample, sampling loose cores by a shrinkage method, sampling non-loose cores by a splitting method, and sampling the cores with the sampling length of 1m.
According to the scheme, the method for rapidly analyzing and testing the field in S4 specifically comprises the following steps:
The method comprises a detection tool box and an on-site detection operation step, wherein the detection tool box comprises a small weighing scale, a plurality of transparent test tubes with the volume of 50ml, a plurality of test tube racks, a plurality of funnels with the diameter of 8cm, two droppers with graduated rubber heads, a box of filter paper, a 1000ml reagent bottle containing ammonium sulfate solution with the concentration of 3%, a 100ml reagent bottle containing oxalic acid saturated solution and a 1000ml distilled water reagent bottle;
The on-site detection operation steps are as follows,
S401, weighing 30g of weathered crust sample by using a small weighing scale, and placing the weathered crust sample in a funnel with filter paper;
s402, placing a funnel on a transparent test tube, keeping the interval between a funnel opening and the bottom of the transparent test tube above 5mm, and placing the transparent test tube on a test tube rack;
s403, using a dropper with a graduated rubber head to absorb 10ml of ammonia sulfate solution, adding the ammonia sulfate solution into a funnel filled with a sample to be tested, repeatedly operating for 5 times before and after to enable the ammonia sulfate solution to fully react with the sample, and obtaining colorless and transparent rare earth-containing solution by soaking and filtering in a transparent test tube;
S404, sucking 3ml of oxalic acid saturated solution by using a dropper with a graduated rubber head, adding the oxalic acid saturated solution into a transparent test tube containing rare earth solution, obtaining oxalic acid rare earth solution with a certain turbidity, and shaking uniformly;
s405, estimating the grade of rare earth oxide in the sample by observing the turbidity of the oxalic acid rare earth solution by naked eyes.
According to the scheme, the preset grade threshold in S5 is 0.02% of the minimum industrial grade of the heavy rare earth specified in the specification for the heavy rare earth, and 0.035% of the minimum industrial grade of the light rare earth for the light rare earth; considering that a soaking blind area is easy to form at the upper position of a liquid injection well in an in-situ leaching process, even if a mine is mined for a plurality of times, the sample analysis result is still possibly higher than the industrial grade standard specified by the specification, when the exploratory project generally reveals that the sample analysis result at the position below the liquid injection well of the mountain is lower than the industrial grade standard, the mountain is still regarded as having no re-filling value.
The mass spectrometry test described in S6 was performed using an inductively coupled-plasma mass spectrometer according to the above protocol.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a resource evaluation method for ion adsorption type rare earth mine re-irrigation areas for the first time under the condition that residual resources are unknown after in-situ ore leaching exploitation of ion adsorption type rare earth mine, provides feasibility demonstration for investigation and evaluation of re-irrigation areas resources, provides important references for avoiding unnecessary exploitation investment and reducing environmental pollution caused by excessive exploitation of mine, and provides a feasibility path for improving rare earth resource recovery rate and guaranteeing full utilization of rare earth resources.
Drawings
FIG. 1 is a schematic diagram of a resource investigation and evaluation flow of an ion adsorption type rare earth mine re-irrigation area;
FIG. 2 (a) is a graph showing the results of the rare earth grade field rapid analysis of the sample exposing the core in the light gray block in FIG. 1 according to the embodiment of the present invention;
Fig. 2 (b) is a graph of the rare earth grade field rapid analysis result of the sample of the disclosed core in the dark gray block in fig. 1 according to the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The following description will take a mining block of Jiangxi foot hole heavy rare earth mining area as an example.
Through field mine exploitation condition investigation, 4 types of liquid injection well projects exist in a mine range, a circle-dividing and compound-filling area range is shown in fig. 1 (partial screenshot), 2 types of liquid injection well projects exist in the diagram range, wherein the diameter of a liquid injection well of a light gray block is 18.0cm, the depth is about 2.0 meters, and the well spacing is 1.50m; the diameter of the liquid injection well of the dark gray area is 30.0cm, the depth is about 2.0 meters, and the well spacing is 2.0-3.0 meters.
Firstly, a Gannan drilling engineering (shown in figure 1) is constructed at the upper part of the middle part of the mountain waist of a mountain where a light gray block is located, the exploratory engineering is arranged between the existing injection well engineering of the mountain head, and continuous sampling analysis is sequentially carried out on cores revealed in the exploratory engineering from top to bottom, and as the revealed cores are granite weathered crust fully weathered loose sand, sample collection is carried out according to a shrinkage method, and the sample length is 1.0 meter. The result of the rapid analysis in the field is shown in figure 2a, the concentration of the solution in the test tube is low, most of the solution is clear water, and the test result shows that the rare earth visual estimation grade is lower than 0.01%. Therefore, the mining engineering is abandoned to be continuously laid on the mountain head (light gray block) when the mining engineering is deployed in the next step, and the mountain ridge (watershed) is used as a boundary line for demarcation when the boundary line is sketched.
In the same way, a Gannan drilling process (shown in figure 1) is constructed at the upper part of the middle part of each mountain waist of the mountain where the dark gray block is located, the prospecting process is arranged between the existing liquid injection well processes of the mountain head, continuous sampling analysis is carried out on the rock cores revealed by the prospecting process in sequence from top to bottom, the rapid analysis result in the field is shown in figure 2b, a large amount of oxalic acid rare earth sediment is shown at the bottom of the test tube, the test result shows that the drilling rare earth visual estimation grade gradually decreases from top to bottom, but all the sample rare earth visual estimation grades are higher than 0.02%. In the next step of mining engineering deployment, the mining engineering is uniformly distributed around the mining engineering at the mountain head (dark gray block) where the mining engineering is located according to the detail or exploration network specified by the specification (as shown in fig. 1).
And (3) carrying out sample collection and numbering on the ore prospecting engineering with the estimated rare earth grade higher than 0.02% by adopting a shrinkage method according to the specification of 1.0 meter in length from top to bottom, and timely conveying the ore prospecting engineering to a laboratory for inductively coupled-plasma mass spectrometry analysis to accurately analyze the rare earth grade of the sample. Finally, the morphology of the residual ore body having the mining value is defined according to the analysis result, and the resource amount is estimated to be XXXton (dark gray block in FIG. 1).
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A method for rapidly evaluating resources of ion adsorption type rare earth mine re-irrigation areas is characterized by comprising the following steps:
S1, investigating the mining condition, and enclosing the range of a re-irrigation area;
s2, preferentially selecting the upper part of the middle part of the mountain waist of the mountain according to the topography and topography characteristics of the re-irrigated area, and deploying a mineral exploration project between the existing liquid injection projects;
S3, continuously sampling the rock cores disclosed by the exploratory engineering from top to bottom in sequence;
S4, performing an outdoor rapid analysis test on the sample collected in the S3 to obtain a sample analysis result, and primarily screening the rare earth mineral content of the sample;
S5, determining a deployment scheme of the next exploratory engineering according to the analysis result of the sample in the S4: when the overall visual estimation grade of the sample is lower than a preset grade threshold, the mountain head where the prospecting project is located in the S2 is regarded as not having the recharging value, and the prospecting project is not deployed; when the overall visual estimation grade of the sample is higher than or equal to a preset grade threshold value, uniformly distributing the prospecting engineering around the mountain head where the prospecting engineering is located in the S2 according to the degree of the detailed investigation or exploration stage;
s6, performing mass spectrometry analysis test on the sample with the eye estimation grade higher than the preset grade threshold in the exploring engineering in the S5;
s7, delineating residual ore bodies with exploitation values according to mass spectrometry analysis test results, and estimating the resource quantity.
2. The method for rapidly evaluating resources in an ion-adsorbing rare earth mine re-irrigated area according to claim 1, wherein the mine exploitation condition in S1 comprises whether there is a liquid injection project, a liquid injection well specification, a liquid injection well spacing, a high-level reservoir and a liquid injection pipeline.
3. The method for rapidly evaluating resources of ion adsorption type rare earth mine re-pouring area according to claim 1, wherein the purpose of deploying the prospecting project between the existing liquid injection projects in S2 is to control a mineral leaching blind area which occurs due to a large liquid injection well spacing.
4. The method for rapidly evaluating resources in an ion-adsorbing rare earth mine re-irrigated area according to claim 1, wherein the sampling method in S3 is as follows: continuously sampling the well detection by adopting a grooving method, wherein the cross section of a sample groove is generally 5cm multiplied by 3cm; sampling a Gannan drill core sample by a shrinkage method; shallow drilling a core sample, sampling loose cores by a shrinkage method, sampling non-loose cores by a splitting method, and sampling the cores with the sampling length of 1m.
5. The method for rapidly evaluating resources of ion adsorption type rare earth mine re-irrigation areas according to claim 1, wherein the field rapid analysis and test method in S4 is specifically as follows:
The method comprises a detection tool box and an on-site detection operation step, wherein the detection tool box comprises a small weighing scale, a plurality of transparent test tubes with the volume of 50ml, a plurality of test tube racks, a plurality of funnels with the diameter of 8cm, two droppers with graduated rubber heads, a box of filter paper, a 1000ml reagent bottle containing ammonium sulfate solution with the concentration of 3%, a 100ml reagent bottle containing oxalic acid saturated solution and a 1000ml distilled water reagent bottle;
The on-site detection operation steps are as follows,
S401, weighing 30g of weathered crust sample by using a small weighing scale, and placing the weathered crust sample in a funnel with filter paper;
s402, placing a funnel on a transparent test tube, keeping the interval between a funnel opening and the bottom of the transparent test tube above 5mm, and placing the transparent test tube on a test tube rack;
s403, using a dropper with a graduated rubber head to absorb 10ml of ammonia sulfate solution, adding the ammonia sulfate solution into a funnel filled with a sample to be tested, repeatedly operating for 5 times before and after to enable the ammonia sulfate solution to fully react with the sample, and obtaining colorless and transparent rare earth-containing solution by soaking and filtering in a transparent test tube;
S404, sucking 3ml of oxalic acid saturated solution by using a dropper with a graduated rubber head, adding the oxalic acid saturated solution into a transparent test tube containing rare earth solution, obtaining oxalic acid rare earth solution with a certain turbidity, and shaking uniformly;
s405, estimating the grade of rare earth oxide in the sample by observing the turbidity of the oxalic acid rare earth solution by naked eyes.
6. The method for rapidly evaluating resources in an ion adsorption type rare earth mine re-irrigation area according to claim 1, wherein the preset grade threshold in S5 is based on 0.02% of heavy rare earth boundary grade and 0.035% of light rare earth boundary grade specified in the weathered shell ion adsorption type rare earth mine geological survey Specification; considering that a soaking blind area is easy to form at the upper position of a liquid injection well in an in-situ leaching process, even if a mine is mined for a plurality of times, the sample analysis result is still possibly higher than the boundary grade standard specified by the specification, when the mining engineering generally reveals that the sample analysis result at the position of the hole depth below the mountain liquid injection well is lower than the industrial grade standard, the mountain is still regarded as having no re-filling value.
7. The method for rapid evaluation of ion adsorption type rare earth mine re-implantation area resources according to claim 1, wherein the mass spectrometry test in S6 is performed by using an inductively coupled-plasma mass spectrometer.
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