CN115725857A - Method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water - Google Patents
Method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water Download PDFInfo
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- 229910052701 rubidium Inorganic materials 0.000 title claims abstract description 93
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000010445 mica Substances 0.000 title claims abstract description 36
- 229910052618 mica group Inorganic materials 0.000 title claims abstract description 36
- 238000005660 chlorination reaction Methods 0.000 title claims description 24
- 238000002386 leaching Methods 0.000 claims abstract description 58
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000003245 coal Substances 0.000 claims abstract description 19
- 238000011282 treatment Methods 0.000 claims abstract description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 11
- 150000003841 chloride salts Chemical class 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 235000019270 ammonium chloride Nutrition 0.000 claims description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 2
- 239000003830 anthracite Substances 0.000 claims description 2
- 239000002802 bituminous coal Substances 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 26
- 238000006243 chemical reaction Methods 0.000 abstract description 21
- FGDZQCVHDSGLHJ-UHFFFAOYSA-M rubidium chloride Chemical compound [Cl-].[Rb+] FGDZQCVHDSGLHJ-UHFFFAOYSA-M 0.000 abstract description 8
- 229940102127 rubidium chloride Drugs 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 10
- 239000011707 mineral Substances 0.000 description 10
- 235000010755 mineral Nutrition 0.000 description 10
- 239000000428 dust Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 239000000779 smoke Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000009614 chemical analysis method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 229910052642 spodumene Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 229910052629 lepidolite Inorganic materials 0.000 description 1
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention provides a method for extracting rubidium from low-grade mica ore by microwave chloridizing roasting water, which is carried out by adopting a two-step combined process of microwave chloridizing roasting and conventional water leaching, wherein the ore is firstly subjected to microwave chloridizing roasting, so that the rubidium in the low-grade mica ore can be enriched and extracted, and chloride can be converted into chloride with good water solubility by using chloride salt, thereby being beneficial to the subsequent water leaching step; under the action of microwave roasting, the microwave absorbing characteristics of the coal powder and the rubidium chloride can be utilized to quickly and uniformly improve the temperature of a reaction system, greatly shorten the temperature rise time and effectively improve the roasting efficiency. Through the mode, the extraction of rubidium in the low-grade mica ore at a lower temperature is realized, and the problems of long treatment flow, low extraction efficiency and the like in the rubidium extraction process in the prior art are effectively solved.
Description
Technical Field
The invention relates to the technical field of mineral extraction, in particular to a method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water.
Background
Rubidium is a member of alkali metals, is very active in nature, and is very easily oxidized in air. But due to their unique physicochemical properties play an irreplaceable role in many fields. In the traditional field, rubidium is mainly applied to the fields of electronic elements, special glass, chemical catalysis, medicines and the like, and nowadays, the rubidium has wide application prospects in high-end technical fields such as thermionic and magnetohydrodynamic power generation, laser technology conversion, satellite calibration and the like.
At present, the content of rubidium in nature is about 0.028%, and the element abundance in crust is sixteenth, which mainly exists in lepidolite, natural carnallite, potash ore, salt lake brine, seawater and the like. Although the total amount of rubidium resources in China is rich, the distribution of the rubidium resources is very dispersed, a pure rubidium mineral is not found at present, the rubidium mineral usually exists in minerals of the same group elements in an associated state, a large part of the rubidium mineral exists in muscovite, and some brine resources are associated with a certain amount of rubidium and are usually located in salt lakes of the northern lake, tibet, qinghai and other places. However, the rubidium is very low in grade, so that the extraction difficulty is increased, and the existing extraction process has the problems of high cost, long flow, low extraction efficiency and the like.
In the prior art, the application number is 202111429243.3, the publication date is 3 months and 1 days in 2022, and the patent document entitled "a method for extracting rubidium from spodumene tailings by volatilization based on a microwave field" firstly uniformly mixes spodumene tailings powder with inorganic nonmetallic fibers, coal powder, water glass and water, dries and dehydrates the mixture to obtain dry green pellets, then calcines the dry green pellets in a high-temperature environment, and collects smoke dust generated by calcination to obtain rubidium-enriched smoke dust; and finally, removing other impurity elements in the rubidium enriched smoke dust to realize extraction of rubidium. According to the technical scheme, the rubidium enriched smoke dust is obtained firstly, and then other impurity elements in the rubidium enriched smoke dust are removed to extract rubidium, so that the rubidium extraction process is not only performed under a high-temperature condition, but also needs a series of impurity removal treatments, and the working difficulty of the rubidium extraction process is increased; in addition, the composition of the minerals is complex, when the content of rubidium is high and the content of other impurities is low, the content of rubidium in the rubidium enriched smoke dust is high, the impurity removal process is easy to carry out, however, when the content of rubidium in the ore is low, the difficulty of impurity removal is increased, and meanwhile, the complex treatment process easily causes the loss of rubidium, and the extraction rate of rubidium is influenced.
In view of the above, there is a need to design an improved method for extracting rubidium from low-grade mica ore by microwave chlorination roasting, so as to solve the above problems.
Disclosure of Invention
The invention aims to provide a method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water, which has the advantages of high extraction efficiency, simple operation, greenness and no pollution.
In order to realize the aim, the invention provides a method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water, which comprises the following steps:
s1, grinding rubidium-containing low-grade mica ore to be used as a roasting raw material, and uniformly mixing the roasting raw material with chloride and coal powder in a preset mass to obtain a roasting mixed material;
s2, transferring the roasted mixed material into a crucible, placing the crucible into a microwave reactor with the power of 600-800W, roasting at the temperature of 700-800 ℃, and grinding again after roasting to obtain a leaching raw material; and then leaching and filtering the leaching raw material to obtain rubidium-containing leaching liquid and leaching residues.
Preferably, in step S1, the amount of the chloride salt added is 50 to 200% by mass of the roasting raw material.
Preferably, in step S1, the amount of the pulverized coal added is 5 to 30% of the mass of the roasting raw material.
Preferably, in the step S2, the heat preservation time in the roasting process is 12 to 20min.
Preferably, in step S2, the leaching treatment is performed according to a ratio of leachate to leaching raw material liquid-solid of (2-4.4): 1 under the conditions described above.
Preferably, in step S2, the temperature of the leaching treatment is 25 to 45 ℃.
Preferably, in step S2, the treatment time of the leaching treatment is 20 to 40min.
Preferably, in step S1, the chloride salt includes calcium chloride, sodium chloride and ammonium chloride.
Preferably, in step S1, the leaching solution is deionized water.
Preferably, in step S1, the pulverized coal includes anthracite, carbon powder, and bituminous coal.
The invention has the beneficial effects that:
1. the method for extracting rubidium by microwave chloridizing roasting water of the low-grade mica ore provided by the invention is carried out by adopting a two-step combined process of microwave chloridizing roasting and conventional water leaching, the process is carried out by treating the mineral to be extracted by using the microwave chloridizing roasting, extracting rubidium from the mineral and enriching the rubidium by using the reaction between added chloride and the rubidium, and the rubidium can be leached by using the good solubility of the rubidium chloride in water in the water leaching process; meanwhile, under the action of microwave roasting, the reaction rate of chloride and rubidium is accelerated, and the high-efficiency extraction of rubidium in low-grade mica ore at a lower temperature is realized. Particularly, in the extraction process of the rubidium, the efficient extraction of the rubidium in the low-grade mica ore can be realized by optimizing the process conditions such as microwave power, roasting temperature, roasting time and the like in the extraction process.
2. According to the method for extracting rubidium from low-grade mica ore by microwave chloridizing roasting water, the minerals to be extracted are treated by microwave chloridizing roasting, the coal powder is added in the process, the reaction system can be heated by utilizing the strong wave absorption characteristic of the coal powder, so that the temperature of the reaction system can quickly reach the temperature required by the reaction of rubidium and chloride, and meanwhile, the generated rubidium chloride also has the wave absorption characteristic, the reaction system can be heated in the reaction process, so that the whole reaction system can be quickly heated, the time required by heating is effectively shortened, the temperature distribution in the reaction system is more uniform, the chlorination process is more fully reacted, the generation of intermediate products can be avoided, and the roasting efficiency is greatly improved; in addition, the coal powder added in the roasting process can also increase the reaction activity, mainly because the large specific surface area of the coal powder can adsorb oxygen in the air to accelerate the chlorination reaction, and the treatment efficiency in the roasting process is improved. Through the mode, the defects of slow temperature rise, long heating time, low extraction efficiency and the like existing in the prior art when conventional roasting is used for heating treatment are effectively overcome, and meanwhile, the method for extracting rubidium from the low-grade mica ore is more green, energy-saving, simple and efficient.
Drawings
FIG. 1 is a schematic flow diagram of a method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the solution of the present invention are shown in the drawings, and other details not closely related to the present invention are omitted.
In addition, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water, which comprises the following steps:
s1, grinding low-grade mica ore containing rubidium to be used as a roasting raw material, and uniformly mixing the roasting raw material with chloride and coal powder with preset mass to obtain a roasting mixed material;
s2, transferring the roasted mixed material into a crucible, roasting in a microwave reactor at the temperature of 700-800 ℃, taking out the crucible after the reaction is finished, cooling to room temperature, and grinding the roasted material into powder to obtain a leaching raw material; then taking certain mass of leaching raw materials, soaking in water for 20-40 min at the temperature of 25-45 ℃, and filtering to obtain rubidium-containing leaching liquid and leaching residues.
Preferably, in step S1, the amount of chloride salt added is 50 to 200% by mass of the raw material for calcination.
Preferably, in step S1, the amount of the pulverized coal added is 5 to 30% by mass of the roasting raw material.
Preferably, in step S2, the power of the microwave reactor during the roasting process is 700-900W.
Preferably, in the step S2, the roasting temperature is 700-800 ℃, and the heat preservation time in the roasting process is 12-20 min.
Preferably, in step S2, the leaching process is performed with deionized water, and the liquid-solid ratio of the deionized water to the leaching raw material is (2-4.4): 1, the unit of the liquid-solid ratio here is mL/g.
The method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water is further described by combining specific examples as follows:
example 1
In this embodiment, the method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water is used for treating rubidium-containing ore, element analysis is performed on the ore before test, the content of rubidium in the ore is 0.066%, and the specific extraction process comprises the following steps:
s1, grinding rubidium-containing low-grade mica ore in an ore grinding machine to obtain a roasting raw material, and uniformly mixing chloride salt accounting for 120% of the mass of the roasting raw material with coal powder to obtain a roasting mixed material, wherein the addition amount of the coal powder accounts for 10% of the mass of the roasting raw material;
s2, transferring the roasted mixed material to a cruciblePlacing the mixture in a microwave reactor, roasting at the temperature of 750 ℃ under 700W, keeping the temperature for 16min, taking out a crucible after the reaction is finished, cooling to room temperature, and grinding the roasted material into powder to obtain a leaching raw material; and putting 15g of leaching raw materials into a beaker, leaching for 30min at the temperature of 35 ℃, and filtering to obtain rubidium-containing leaching solution and leaching residues. Washing and drying the leaching residue, measuring the content of rubidium in the leaching residue by adopting a chemical analysis method, and calculating to obtain a leaching rate of 98.2 percent of rubidium, wherein the calculation formula of the leaching rate is
Wherein m is 0 The mass of the raw material rubidium-containing ore is expressed in g; m is 1 The mass of the leaching slag obtained after leaching is expressed as g; omega 1 The content of rubidium in the leaching residue obtained after leaching is expressed in unit; omega 0 Represents the content of rubidium in the raw rubidium-containing ore, m in this example 1 ＝6.08g，ω 1 ＝0.003％。
Examples 2 to 17
Examples 2 to 17 differ from example 1 only in that: the process parameters in the extraction process are different from those in embodiment 1, and other steps are substantially the same as those in embodiment 1, and are not described herein again. The setting of the process parameters of examples 1 to 17 and the leaching rate of rubidium under the corresponding conditions are shown in table 1, and it can be seen from the table that when the microwave power is 700W, the roasting temperature is 750 ℃, and the roasting time is 16min, the leaching rate of rubidium is the maximum, which indicates that the leaching effect under the conditions is the best; in addition, the leaching rate shows a rule of increasing and then decreasing along with the increase of the microwave power, the roasting temperature and the roasting time.
Comparative example 1
In comparative example 1, the process was carried out using a conventional muffle furnace, and the specific steps were as follows:
s1, grinding rubidium-containing low-grade mica ore in an ore mill to obtain a roasting raw material, and uniformly mixing chloride salt with the mass being 120% of the mass of the roasting raw material with coal powder to obtain a roasting mixed material, wherein the addition amount of the coal powder is 10% of the mass of the roasting raw material;
s2, transferring the roasted mixed material into a crucible, roasting the mixture in a muffle furnace at 750 ℃, preserving heat for 16min, taking out the crucible after the reaction is finished, cooling the crucible to room temperature, and grinding the roasted material into powder to obtain a leaching raw material; and then 15g of leaching raw materials are taken and placed in a beaker, and the weight ratio of the leaching raw materials to the liquid-solid ratio is 3.2:1, adding deionized water, leaching at 45 ℃ for 40min, and filtering to obtain rubidium-containing leachate and leaching residues.
The leaching rate of rubidium measured by a chemical analysis method after washing and drying the leaching residue is 86.9%, and the result is obviously lower than the leaching rate of 98.2% in example 1. The method is mainly characterized in that when the microwave method is used for roasting, the temperature of a reaction system can be quickly raised by utilizing the strong wave absorption characteristic of coal powder, meanwhile, the wave absorption characteristic of rubidium chloride generated in the reaction process is better, the reaction system can be locally heated, the temperature of the whole reaction system is ensured to be kept uniform, and under the combined action of the two processes, the rubidium is effectively extracted and enriched from the mineral to be treated, so that the extraction efficiency of the rubidium is improved. However, in comparative example 1, the muffle furnace calcination method requires a long temperature rise process, and the temperature of the reaction system is not uniform during the reaction process, so that the enrichment and extraction processes are not effective, and the final leaching rate of rubidium is not high.
Table 1 setting of process parameters of examples 1 to 17 and comparative example 1 and leaching rate of rubidium under corresponding conditions
In conclusion, according to the method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water, disclosed by the invention, the ore to be treated is treated by microwave chlorination roasting, so that the rubidium in the low-grade mica ore can be enriched and extracted, and the rubidium can be converted into chloride with good water solubility by using chloride, thereby facilitating the subsequent water leaching step; in the treatment process, the extraction efficiency of the rubidium can be improved by optimizing the process conditions such as microwave power, roasting temperature, roasting time and the like in the extraction process. Through the mode, the extraction of rubidium in the low-grade mica ore at a lower temperature is realized, and the problems of long treatment flow, low extraction efficiency and the like in the rubidium extraction process in the prior art are effectively solved.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. A method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water is characterized by comprising the following steps:
s1, grinding low-grade mica ore containing rubidium to be used as a roasting raw material, and uniformly mixing the roasting raw material with chloride and coal powder with preset mass to obtain a roasting mixed material;
s2, transferring the roasted mixed material into a crucible, placing the crucible into a microwave reactor with the power of 600-800W, roasting at the temperature of 700-800 ℃, and grinding again after roasting to obtain a leaching raw material; and then leaching and filtering the leaching raw material to obtain rubidium-containing leaching liquid and leaching residues.
2. The method for extracting rubidium from low-grade mica ore through microwave chlorination roasting water as claimed in claim 1, wherein in step S1, the addition amount of the chloride is 50-200% of the roasting raw material by mass.
3. The method for extracting rubidium from low-grade mica ore through microwave chlorination roasting water is characterized in that in the step S1, the addition amount of coal powder is 5-30% of the roasting raw material by mass.
4. The method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water as claimed in claim 1, wherein in step S2, the heat preservation time in the roasting process is 12-20 min.
5. The method for extracting rubidium from low-grade mica ore through microwave chlorination roasting water as claimed in claim 1, wherein in step S2, the leaching treatment is performed according to the liquid-solid ratio of a leachate to a leaching raw material being (2-4.4): 1 under the conditions described above.
6. The method for extracting rubidium from low-grade mica ore through microwave chlorination roasting water as claimed in claim 1, wherein in step S2, the temperature of the leaching treatment is 25-45 ℃.
7. The method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water as claimed in claim 1, wherein in step S2, the treatment time of the leaching treatment is 20-40 min.
8. The method for extracting rubidium from low-grade mica ore by microwave chlorination roasting water as claimed in claim 1, wherein in step S1, the chloride salt comprises calcium chloride, sodium chloride and ammonium chloride.
9. The method for extracting rubidium from low-grade mica ore through microwave chlorination roasting water as claimed in claim 5, wherein in step S1, the leachate is deionized water.
10. The method for extracting rubidium from low-grade mica ore through microwave chlorination roasting and water leaching, according to claim 1, is characterized in that in the step S1, the coal powder comprises anthracite, carbon powder and bituminous coal.
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