CN115058609A - Method for leaching rare earth in basalt weathering crust - Google Patents
Method for leaching rare earth in basalt weathering crust Download PDFInfo
- Publication number
- CN115058609A CN115058609A CN202210700947.8A CN202210700947A CN115058609A CN 115058609 A CN115058609 A CN 115058609A CN 202210700947 A CN202210700947 A CN 202210700947A CN 115058609 A CN115058609 A CN 115058609A
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- China
- Prior art keywords
- leaching
- basalt
- rare earth
- weathering
- roasting
- Prior art date
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- 238000002386 leaching Methods 0.000 title claims abstract description 55
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 37
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000002893 slag Substances 0.000 claims abstract description 15
- 230000003213 activating effect Effects 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 230000035484 reaction time Effects 0.000 claims description 6
- 239000012190 activator Substances 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims 4
- 239000010955 niobium Substances 0.000 claims 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims 4
- 238000001914 filtration Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B59/00—Obtaining rare earth metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/06—Sulfating roasting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for leaching rare earth from basalt weathering crust, which adopts a process of adding an activating agent into a basalt weathering crust sample for low-temperature roasting, and adding a leaching agent into the obtained roasting slag for leaching.
Description
Technical Field
The invention relates to the technical field of comprehensive utilization of basalt weathering crust, in particular to a method for leaching rare earth in the basalt weathering crust.
Background
Rare earth is widely applied to the emerging fields of superconducting materials, aerospace, atomic energy and the like due to the special physical and chemical properties of the rare earth, and is an important strategic key mineral product which occupies the highest point of science and technology and economy in China. Rare earth is the dominant mineral resource in China, and the advantages of China as a large country of rare earth resources are gradually weakened, so that the development and utilization of potential rare earth resources are enhanced, and the method has important research significance.
In recent years, researches show that regional ancient weathering crust widely develops on unconformity surface of basalt top of two-fold system Emei mountain and bottom of overlying Longtan group or Xuanwei group in Guizhou area, and the ancient weathering crust contains abundant rare earth resources, namely Sigma RE 2 O 3 The average content is 0.093 percent, the industrial grade of the weathered shell type rare earth deposit is 800-1500 mu g/g (the geological survey specification DZ/T0202-. The rare earth enrichment layer related to the ancient surface weathering-deposition action has important resource potential and economic value and is expected to become important supplement of rare earth resources in China, so that the research on extracting rare earth from weathering crust has important scientific significance and economic value.
At present, the researches on the extraction of rare earth in the weathering crust are few and weak, most of the rare earth is in the preliminary leaching stage of a laboratory, the leaching rate of the rare earth is low and the leaching effect is not ideal in the direct leaching, and the energy consumption of the selective leaching after the high-temperature roasting and activation is high, an effective leaching method is lacked, and the leaching process needs to be further optimized.
Disclosure of Invention
The invention aims to provide a method for leaching rare earth in a basalt weathering crust, optimize the technological conditions for leaching the rare earth in the weathering crust, improve the leaching rate of the rare earth, and provide an effective rare earth leaching process to overcome the defects of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a method for leaching rare earth from basalt weathering crust comprises the steps of adding an activating agent into a basalt weathering crust sample for low-temperature roasting, and adding a leaching agent into obtained roasting slag for leaching, so that rare earth in the basalt weathering crust can be effectively leached.
As a further scheme of the invention: and carrying out crushing treatment on the basalt weathering crust sample, wherein the crushed grain size is-0.1 mm to-0.01 mm.
As a further scheme of the invention: the low-temperature roasting is to mix the basalt weathering crust sample with an activator, the roasting temperature is 120-250 ℃, and the roasting time is 2-6 h.
As a further scheme of the invention: the basalt weathering crust sample and the activating agent are mixed according to the mass ratio of 1: 1-1: 2.
As a further scheme of the invention: the activating agent is concentrated sulfuric acid.
As a further scheme of the invention: the leaching process is to add the roasting slag into a leaching agent, and carry out leaching reaction under the conditions that the reaction temperature is 50-90 ℃, the stirring intensity is 300r/min, and the reaction time is 0.5-2.5 h.
As a further scheme of the invention: the solid-liquid ratio of the roasting slag to the leaching agent is 1: 4-1: 10.
As a further scheme of the invention: the leaching agent adopts a sulfuric acid solution with the volume concentration of 10-25%.
Compared with the prior art, the invention has the beneficial effects that:
1. the raw material used by the method is weathering crust claystone at the top of basalt in Emei mountain, the rare earth resource reserves are abundant, the source is wide, and reasonable development and utilization are not achieved at present;
2. sulfuric acid is used as an activating agent and a leaching agent, is low in cost and easy to obtain, and can effectively leach rare earth in weathered crust claystone, and the leaching rate of the rare earth can reach more than 90%;
3. firstly, sulfuric acid is adopted to roast and activate weathered crust claystone at low temperature, and then sulfuric acid is adopted to stir and leach rare earth, so that the method has the advantages of high rare earth leaching rate, low cost, simple operation, strong adaptability and the like.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely described below; it is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Example 1
Weighing 50g of sample crushed to-0.074 mm, uniformly mixing the sample and concentrated sulfuric acid according to the mass ratio of 1:1, roasting at 150 ℃ for 4 hours, after roasting, slowly adding roasted slag into sulfuric acid with the volume fraction of 10% according to the solid-to-liquid ratio of 1:10, stirring and leaching under the conditions that the reaction temperature is 70 ℃, the stirring strength is 300r/min, and the reaction time is 1 hour, and after leaching, filtering to obtain leachate and leached slag, wherein the leaching rate of rare earth is 91.14%.
Example 2
Weighing 50g of sample crushed to-0.074 mm, uniformly mixing the sample and concentrated sulfuric acid according to the mass ratio of 1:1, roasting at the temperature of 120 ℃ for 4 hours, after roasting, slowly adding roasted slag into sulfuric acid with the volume fraction of 10% according to the solid-to-liquid ratio of 1:10, stirring and leaching under the conditions that the reaction temperature is 70 ℃, the stirring strength is 300r/min and the reaction time is 1 hour, and after leaching, filtering to obtain leachate and leached slag, wherein the leaching rate of rare earth is 84.00%.
Example 3
Weighing 50g of sample crushed to-0.074 mm, uniformly mixing the sample and concentrated sulfuric acid according to the mass ratio of 1:1, roasting at 150 ℃ for 2h, slowly adding roasted slag into sulfuric acid with the volume fraction of 10% according to the solid-to-liquid ratio of 1:10 after roasting is finished, carrying out stirring leaching under the conditions that the reaction temperature is 70 ℃, the stirring strength is 300r/min and the reaction time is 1h, and filtering to obtain leachate and leached slag after leaching is finished, wherein the leaching rate of rare earth is 85.19%.
Example 4
Weighing 50g of sample crushed to-0.074 mm, uniformly mixing the sample and concentrated sulfuric acid according to the mass ratio of 1:1, roasting at 150 ℃ for 4 hours, after roasting, slowly adding roasted slag into sulfuric acid with the volume fraction of 15% according to the solid-to-liquid ratio of 1:10, stirring and leaching under the conditions that the reaction temperature is 70 ℃, the stirring strength is 300r/min and the reaction time is 1 hour, and after leaching, filtering to obtain leachate and leached slag, wherein the leaching rate of rare earth is 98.82%.
The four embodiments are only four specific preferred examples within the parameter range disclosed in the technical scheme, and the embodiments with other range values are not described in detail in the specification; but can be tested according to the protocol of the present application by a person skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method for leaching rare earth from basalt weathering crust is characterized by comprising the following steps: the method adopts a process that an activating agent is added into a basalt weathering crust sample for low-temperature roasting, and a leaching agent is added into the obtained roasting slag for leaching, so that rare earth in the basalt weathering crust can be effectively leached.
2. The method for leaching rare earth from basalt weathering crust according to claim 1, characterized in that: and carrying out crushing treatment on the basalt weathering crust sample, wherein the crushed grain size is-0.1 mm to-0.01 mm.
3. The method of niobium leaching from basalt weathering shells as claimed in claim 1, wherein: the low-temperature roasting is to mix the basalt weathering crust sample with an activator, the roasting temperature is 120-250 ℃, and the roasting time is 2-6 h.
4. The method of rare earth leaching in basalt weathering crust of claim 3, wherein: the basalt weathering crust sample and the activator are mixed according to the mass ratio of 1: 1-1: 2.
5. The method of rare earth leaching in basalt weathering crust of claim 1, wherein: the activating agent is concentrated sulfuric acid.
6. The method of niobium leaching from basalt weathering shells as claimed in claim 1, wherein: the leaching process is to add the roasting slag into a leaching agent, and carry out leaching reaction under the conditions that the reaction temperature is 50-90 ℃, the stirring intensity is 300r/min, and the reaction time is 0.5-2.5 h.
7. The method of niobium leaching from basalt weathering shells according to claim 6, wherein: the solid-liquid ratio of the roasting slag to the leaching agent is 1: 4-1: 10.
8. The method of niobium leaching from basalt weathering shells as claimed in claim 1, wherein: the leaching agent adopts a sulfuric acid solution with the volume concentration of 10-25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210700947.8A CN115058609A (en) | 2022-06-20 | 2022-06-20 | Method for leaching rare earth in basalt weathering crust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210700947.8A CN115058609A (en) | 2022-06-20 | 2022-06-20 | Method for leaching rare earth in basalt weathering crust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115058609A true CN115058609A (en) | 2022-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210700947.8A Pending CN115058609A (en) | 2022-06-20 | 2022-06-20 | Method for leaching rare earth in basalt weathering crust |
Country Status (1)
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|---|---|
| CN (1) | CN115058609A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405337A (en) * | 2002-09-25 | 2003-03-26 | 包头稀土研究院 | Low-temperature roasting and decomposing process of rare earth heading concentrated sucfuric acid |
| CN1721559A (en) * | 2004-12-15 | 2006-01-18 | 北京有色金属研究总院 | Process for comprehensive recovery of rare earth and thorium from rare earth ore |
| CN101363079A (en) * | 2007-08-10 | 2009-02-11 | 有研稀土新材料股份有限公司 | Smelting method of iron rich mengite rare-earth mine |
| CN101633980A (en) * | 2008-07-23 | 2010-01-27 | 甘肃稀土新材料股份有限公司 | Roasting process of sulfuric acid of rare-earth ore |
| CN105671304A (en) * | 2016-02-25 | 2016-06-15 | 昆明贵金属研究所 | Method for recycling rare earth and platinum group metal from spent automobile emission purification catalyst |
| JP2017014605A (en) * | 2015-07-06 | 2017-01-19 | 三菱マテリアル株式会社 | Recovery method of rare earth element |
| CN108950188A (en) * | 2018-05-25 | 2018-12-07 | 包头稀土研究院 | The method of concentrated sulfuric acid low-temperature bake phosphorous rare earth ore concentrate step by step arithmetic phosphorus and rare earth |
-
2022
- 2022-06-20 CN CN202210700947.8A patent/CN115058609A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405337A (en) * | 2002-09-25 | 2003-03-26 | 包头稀土研究院 | Low-temperature roasting and decomposing process of rare earth heading concentrated sucfuric acid |
| CN1721559A (en) * | 2004-12-15 | 2006-01-18 | 北京有色金属研究总院 | Process for comprehensive recovery of rare earth and thorium from rare earth ore |
| CN101363079A (en) * | 2007-08-10 | 2009-02-11 | 有研稀土新材料股份有限公司 | Smelting method of iron rich mengite rare-earth mine |
| CN101633980A (en) * | 2008-07-23 | 2010-01-27 | 甘肃稀土新材料股份有限公司 | Roasting process of sulfuric acid of rare-earth ore |
| JP2017014605A (en) * | 2015-07-06 | 2017-01-19 | 三菱マテリアル株式会社 | Recovery method of rare earth element |
| CN105671304A (en) * | 2016-02-25 | 2016-06-15 | 昆明贵金属研究所 | Method for recycling rare earth and platinum group metal from spent automobile emission purification catalyst |
| CN108950188A (en) * | 2018-05-25 | 2018-12-07 | 包头稀土研究院 | The method of concentrated sulfuric acid low-temperature bake phosphorous rare earth ore concentrate step by step arithmetic phosphorus and rare earth |
Non-Patent Citations (1)
| Title |
|---|
| 《中国矿床发现史 贵州卷》编委会: "《现代冶金工艺学 有色金属冶金卷》", vol. 1, 第114-118页, pages: 422 - 118 * |
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