Method for rapidly identifying ion adsorption type rare earth ore and application thereof

Abstract

The invention discloses a method for rapidly identifying ion adsorption type rare earth ore, and relates to the technical field of mineral exploration, and the method comprises the following steps: reacting a collected rare earth ore sample with an ammonium sulfate solution to obtain a filtrate, adding an oxalic acid solution into the filtrate, and obtaining the ion adsorption type rare earth ore when white floccules appear. The method realizes the effect of determining whether the rare earth ore is the ion adsorption type rare earth ore in the field, and has the characteristics that the time is greatly shortened (the test is completed in the field without being sent to a laboratory), the procedure is convenient and simple, the cost is greatly reduced, and the efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of mineral exploration, and in particular to a method for rapidly identifying ion-adsorbed rare earth ores and an application thereof. Background Art

[0002] Rare earth elements are widely used in high-tech due to their special physical and chemical properties. They play an irreplaceable role in the fields of national defense and military industry and have become extremely important strategic resources. Ion-adsorption rare earth ores are formed by free rare earth ions produced by weathering of parent rocks being adsorbed by clay minerals in the weathering crust and continuously enriched. Although the grade of ion-adsorption rare earth ores is relatively low (total rare earth oxides account for about 0.05wt%-0.2wt%), they provide more than 80% of the world's medium and heavy rare earths.

[0003] At present, in order to identify whether it is an ion-adsorption type rare earth mineral, it is necessary to collect samples in the field, mail them to the laboratory, and use the laboratory's fixed large-scale instruments and equipment to conduct analysis and testing. Only by obtaining experimental data can it be determined whether it is an ion-adsorption type rare earth mineral. Therefore, there are disadvantages such as long cycle (from the field to the laboratory, waiting in line in the laboratory, as short as 1 month, as long as 3 months or longer), complicated procedures (sampling, sample delivery, sample preparation, instrument testing), and high cost (mailing fees, chemicals, instrument loss, electricity bills, etc.).

[0004] Therefore, how to provide a method for quickly identifying ion-adsorbed rare earth ores is a technical problem that urgently needs to be solved in this field. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a method for quickly identifying ion-adsorbed rare earth ores and its application. The present invention utilizes the mineralization characteristics of the rare earth ions in the ion-adsorbed rare earth ores adsorbed on clay minerals and the characteristics of clay minerals to solve the traditional technical problem of being unable to complete and determine whether it is a rare earth ore in the field.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A method for rapidly identifying ion-adsorbing rare earth ores comprises the following steps: reacting a collected rare earth ore sample with an ammonium sulfate solution to obtain a filtrate, adding an oxalic acid solution to the filtrate, and producing white floccules, which are ion-adsorbing rare earth ores.

[0008] Preferably, the mass ratio of the rare earth ore sample, the ammonium sulfate and the oxalic acid is 12:5:1.

[0009] Preferably, the concentration of the ammonium sulfate solution is 4.0-4.5%.

[0010] Preferably, the ammonium sulfate solution is added in 3-5 times.

[0011] Preferably, the concentration of the oxalic acid solution is 3.5-4.0%.

[0012] Preferably, the reaction time after each addition is 2.5-3 min.

[0013] The above method is used in field testing to identify ion-adsorption rare earth ores.

[0014] Preferably, the specific steps of the test identification are:

[0015] (1) Collect rare earth ore samples on site and prepare ammonium sulfate solution and oxalic acid solution for use;

[0016] (2) placing the rare earth ore sample into a funnel-shaped filter paper, then adding the ammonium sulfate solution, and collecting the filtrate;

[0017] (3) Add the oxalic acid solution to the filtrate and observe the color change of the filtrate. If white floccules appear, it is determined to be an ion-adsorbed rare earth ore. If the solution does not change, it is not an ion-adsorbed rare earth ore.

[0018] Preferably, the specific steps of adding the ammonium sulfate solution in step (2) are: dripping the ammonium sulfate solution into the sample rare earth ore sample, reacting for 2.5-3 minutes, dripping the ammonium sulfate solution again, reacting for 2.5-3 minutes, and then repeating 1-3 times to obtain the filtrate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The method of the present invention can determine whether it is an ion adsorption type rare earth ore in the field, and has the characteristics of greatly reducing time (testing is completed in the field without sending it to the laboratory), convenient and simple procedures, greatly reducing costs, and greatly improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings in this description are only embodiments of the present invention.

[0022] Figure 1 This is a flow chart of adding ammonium sulfate solution in Example 1 of the present invention;

[0023] Figure 2 This is a diagram of the reaction results of 19 rare earth mineral samples in Examples of the present invention. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0025] Example 1

[0026] The present invention provides a method for quickly identifying ion adsorption type rare earth ores, which specifically comprises the following steps:

[0027] (1) Prepare standard solid ammonium sulfate, standard solid oxalic acid, special solution reagent bottles, test tubes, filter paper, funnel, and scale (0.1 g) for easy carrying in the field;

[0028] (2) preparing a 4.3% ammonium sulfate solution and a 3.8% oxalic acid solution for later use;

[0029] (3) Collect rare earth ore samples in the field, weigh the rare earth ore sample, ammonium sulfate and oxalic acid in a mass ratio of 12:5:1, fold the filter paper into a funnel shape, put the funnel-shaped filter paper into the funnel, put the funnel into the test tube, and put the collected sample into the funnel with the filter paper;

[0030] (4) Slowly and evenly drip the ammonium sulfate solution into the sample in the funnel (such as Figure 1 ), react for 2.5 min, add ammonium sulfate solution again, react for 2.5 min, repeat twice, total reaction time 10 min, wait until NH 4+ The ions completely replace the rare earth ions in the sample, and the solution all leaks through the filter paper into the test tube to obtain the filtrate;

[0031] (5) Add a well-proportioned oxalic acid solution to the filtrate in the test tube and observe the color change of the solution. If white floccules appear in the filtrate in the test tube, it is determined to be an ion-adsorbed rare earth ore. If the solution does not change, it is not an ion-adsorbed rare earth ore. At the same time, according to the different concentrations of white floccules in the test tube, the ion-adsorbed rare earth mineralization, low-grade ore and industrial ore can be semi-quantitatively determined;

[0032] The above method was used to identify 9 rare earth ore samples (labeled H2-H10). The relevant results are shown in Table 1 and Figure 2 ;

[0033] Table 1

[0034] Serial number grade H2 0.03 H3 0.04 H4 0.0757 H5 0.0715 H6 0.099 H7 0.0909 H8 0.0848 H9 0.1562 H10 0.1172

[0035] According to the industry standard "Mineral Geological Exploration Specifications Rare Earth" (DZ / T 0204-2022), 0.035% is the boundary grade (0.035% and above is rare earth ore), and 0.05% is the minimum industrial grade; as can be seen from the table and figure, H6-H10 is an industrial mine, and H4-H5 is a low-grade mine. The method of the present invention can quickly determine whether it is an ion adsorption type rare earth ore. The test is completed on-site and does not need to be sent to the laboratory, which greatly reduces the time. The procedure is convenient and simple, the cost can be greatly reduced, and the efficiency can be greatly improved.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for rapidly identifying ion-adsorption rare earth ores, characterized in that: The method comprises the following steps: reacting the collected rare earth ore sample with an ammonium sulfate solution to obtain a filtrate, adding an oxalic acid solution to the filtrate, and producing white floccules, which are ion-adsorbed rare earth ore.

2. A method for rapidly identifying ion-adsorption rare earth ores according to claim 1, characterized in that: The mass ratio of the rare earth ore sample, the ammonium sulfate and the oxalic acid is 12:5:

1.

3. A method for rapidly identifying ion-adsorption rare earth ores according to claim 1, characterized in that: The concentration of the ammonium sulfate solution is 4.0-4.5%.

4. A method for rapidly identifying ion-adsorption rare earth ores according to claim 1, characterized in that: The ammonium sulfate solution is added in 3-5 portions.

5. The method for rapidly identifying ion-adsorption rare earth ores according to claim 1, characterized in that: The concentration of the oxalic acid solution is 3.5-0.4%.

6. A method for rapidly identifying ion-adsorption rare earth ores according to claim 4, characterized in that: The reaction time after each addition is 2.5-3 minutes.

7. Application of the method according to any one of claims 1 to 6 in field testing and identification of ion-adsorption type rare earth ores.

8. The use according to claim 7, characterized in that: The specific steps of the test identification are: (1) Collect rare earth ore samples on site and prepare ammonium sulfate solution and oxalic acid solution for use; (2) placing the rare earth ore sample into a funnel-shaped filter paper, then adding the ammonium sulfate solution, and collecting the filtrate; (3) Add the oxalic acid solution to the filtrate and observe the color change of the filtrate. If white floccules appear, it is determined to be an ion-adsorbed rare earth ore. If the solution does not change, it is not an ion-adsorbed rare earth ore.

9. The use according to any one of claim 8, characterized in that: The specific steps of adding the ammonium sulfate solution in step (2) are: dripping the ammonium sulfate solution into the sample rare earth ore sample, reacting for 2.5-3 minutes, dripping the ammonium sulfate solution again, reacting for 2.5-3 minutes, and then repeating 1-3 times to obtain the filtrate.

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