CN103173617A - Method for removing radium from south ionic rare earth leachate - Google Patents
Method for removing radium from south ionic rare earth leachate Download PDFInfo
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- CN103173617A CN103173617A CN2013100684459A CN201310068445A CN103173617A CN 103173617 A CN103173617 A CN 103173617A CN 2013100684459 A CN2013100684459 A CN 2013100684459A CN 201310068445 A CN201310068445 A CN 201310068445A CN 103173617 A CN103173617 A CN 103173617A
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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
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Abstract
The invention relates to a method for removing radium from south ionic rare earth leachate. The method is characterized in comprising the steps that: (1) ferrous salt or iron chips are added into a rare earth leachate according to a mass ratio that ferrous salt or iron chips to rare earth leachate is 0.1-10:1000; the materials are mixed for 0.5-6h by stirring; (2) solid barium chloride or a barium chloride solution are added into the rare earth leachate obtained in the step (1) according to a mass ratio that barium chloride to rare earth leachate is 0.1-10:1000; and the materials are uniformly mixed by stirring; (3) an oxidant is added into the rare earth leachate obtained in the step (2) according to a molar ratio that oxidant to rare earth leachate is 0.1-10:1; stirring is carried out for 0.5-3h, and 1-100ppm polyacrylamide flocculant is added; the material is subjected to standing and is clarified; clear solution is sucked; filtering is carried out; the precipitate is the radium-removing slag, and the clear solution is the radium-removed rare earth leachate. With the method provided by the invention, radium can be deeply removed from the rare earth leachate. The process is simple, separation effect is good, and subsequent rare earth separation processes are not affected.
Description
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Technical field
The present invention relates to a kind of method of removing radium from southern ion type rareearth leach liquor.
Background technology
Rare-earth mineral all contains the radioactive substance of some amount, and the radioelement of different rare-earth minerals has larger difference.Research work mainly concentrates on monazite, hamartite and aspect, mixing ore deposit thereof to the past people to the rare earth radioactivity, yet the ion type rareearth ore of China also contains some radioactive element radiums.Owing to containing radioactive element radium in ion type rareearth ore, cause also containing in re dip solution a small amount of radioactive element radium, wherein radium concentration is 1 ~ 30Bq/L, the leach liquor gross activity is higher.These radioelement further disperse in sepn process, cause radiocontamination area change in production environment, and process these radioelement difficulty and further strengthen.Therefore; need from radiation health protection or environment protection angle, the radiological hazard of ion type rareearth sepn process to be proposed the respective handling scheme; radioelement is carried out deep removal, reduce radioelement in the distribution of extraction separation process, be conducive to improve production environment.
At present, generally adopt to add chlorination barium salt precipitation radium in southern ion type rareearth feed liquid, because the ionic radius of radium and barium is very close, therefore exist isomorphous coprecipitation phenomena, in barium sulfate precipitate with under the radium carrier band.But barium sulfate radium method effect except radium from southern ion type rareearth leach liquor is not very desirable at present.Therefore, need to seek a kind of suitable, better effects if from southern ion type rareearth leach liquor except the method for radium.
Summary of the invention
The object of the present invention is to provide a kind of method of removing radium from southern ion type rareearth leach liquor.The re dip solution that described southern ion type rareearth leach liquor is hydrochloric acid in southern ion type rareearth ore, wherein rare earth ion concentration is 0.8 ~ 1.8mol/L, radium concentration is 1 ~ 30Bq/L, pH＞3.0.
The present invention is as follows except the method for radium: (1) presses ferrous salt or iron filings: the mass ratio 0.1 ~ 10: 1000 of re dip solution adds ferrous salt or iron filings in re dip solution, mix 0.5 ~ 6 hour; (2) press bariumchloride: the mass ratio 0.1 ~ 10: 1000 of re dip solution adds solid-state bariumchloride or barium chloride solution in the re dip solution of step (1), mix; (3) by oxygenant: the mol ratio 0.1 ~ 10: 1 of ferrous salt or iron filings is added oxygenant in the re dip solution of step (2), stir after 0.5 ~ 3 hour, add the polyacrylamide flocculant of 1 ~ 100ppm, after standing clarification, the sucking-off clear liquid, filter, precipitation is except the radium slag, and clear liquid is except the re dip solution after radium.
Above-mentioned ferrous salt is iron protochloride, ferrous sulfate or Iron diacetate.
Above-mentioned oxygenant is hydrogen peroxide or clorox.
The present invention adopts the acid-respons that adds in ferrous salt or iron filings and solution to generate the divalence ferrous ion, and the ferrous ion in re dip solution is increased; Add subsequently bariumchloride in rare earth feed liquid.Because the ionic radius of radium and barium is very close, radium and barium and sulfate radical form barium sulfate radium precipitation, then adding oxygenant makes the divalence ferrous ion be oxidized to ferric ion, the ferric ion hydrolysis generates ferric hydroxide precipitate, utilize the strong adsorptive power of ferric hydroxide precipitate, the barium sulfate radium deposit seeds that absorption suspends and flocculation, the barium sulfate radium particle that suspends in minimizing solution further improves the purpose except the radium effect.
The method of removing radium from southern ion type rareearth leach liquor of the present invention can be with radium deep removal from re dip solution, and technique is simple, and good separating effect does not affect follow-up Rare Earth Separation technique.
Embodiment
Embodiment 1
South ion type rareearth leach liquor, wherein rare earth ion concentration is 1.7mol/L, radium concentration is 10Bq/L, pH=3.0.By iron filings: the re dip solution mass ratio toward re dip solution in adds iron filings at 0.1: 1000, mixes 6 hours; Press bariumchloride: the re dip solution mass ratio to above-mentioned re dip solution in adds solid bariumchloride at 5: 1000, mixes; Press hydrogen peroxide: the mol ratio of iron filings is added the hydrogen peroxide of 37%wt at 10: 1, stir after 1 hour, add the 1%wt polyacrylamide solution of 50ppm, after standing clarification, the sucking-off clear liquid filters, and precipitation is except the radium slag, clear liquid is for except the re dip solution after radium, analyzes to record wherein that radium concentration is 0.055Bq/L.
Embodiment 2
South ion type rareearth leach liquor, wherein rare earth ion concentration is 1.2mol/L, radium concentration is 30Bq/L, pH=4.0.By ferrous sulfate: the re dip solution mass ratio toward re dip solution in adds ferrous sulfate at 0.2: 1000, mixes 0.5 hour; By bariumchloride: the mass ratio of re dip solution to above-mentioned re dip solution in adds bariumchloride at 10: 1000, mixes; Press clorox: the mol ratio of iron filings is added 20% chlorine bleach liquor at 9: 1, stir after 3 hours, add the 1%wt polyacrylamide solution of 9000ppm, after standing clarification, the sucking-off clear liquid filters, and precipitation is except the radium slag, clear liquid is for except the re dip solution after radium, analyzes to record wherein that radium concentration is 0.065Bq/L.
Embodiment 3
South ion type rareearth leach liquor, wherein rare earth ion concentration is 0.85mol/L, radium concentration is 20Bq/L, pH=3.5.By iron protochloride: the re dip solution mass ratio toward re dip solution in adds iron protochloride at 10: 1000, mixes 0.5 hour; Press bariumchloride: the mass ratio of re dip solution to above-mentioned re dip solution in adds 30%wt barium chloride solution at 5: 1000, mixes; Press clorox: the mol ratio of iron filings is added 50% clorox at 5: 1, stir after 0.5 hour, add the 1%wt polyacrylamide solution of 1000ppm, after standing clarification, the sucking-off clear liquid filters, and precipitation is except the radium slag, clear liquid is for except the re dip solution after radium, analyzes to record wherein that radium concentration is 0.050Bq/L.
Embodiment 4
South ion type rareearth leach liquor, wherein rare earth ion concentration is 1.5mol/L, radium concentration is 20Bq/L, pH=3.5.By Iron diacetate: the re dip solution mass ratio toward re dip solution in adds Iron diacetate at 2: 1000, mixes 3 hours; Press bariumchloride: the mass ratio of re dip solution to above-mentioned re dip solution in adds 10%wt barium chloride solution at 0.2: 1000, mix, press hydrogen peroxide: the mol ratio of iron filings is added 20%wt hydrogen peroxide at 0.2: 1, stirs after 2.5 hours, adds the 2%wt polyacrylamide solution of 2500ppm, after standing clarification, the sucking-off clear liquid filters, and precipitation is except the radium slag, clear liquid is for except the re dip solution after radium, analyzes to record wherein that radium concentration is 0.070Bq/L.
Claims (3)
- One kind from southern ion type rareearth leach liquor except the method for radium, the re dip solution that described southern ion type rareearth leach liquor is hydrochloric acid in southern ion type rareearth ore, wherein rare earth ion concentration is 0.8 ~ 1.8mol/L, radium concentration is 1 ~ 30Bq/L, pH＞3.0, it is characterized in that step is as follows: (1) presses ferrous salt or iron filings: the mass ratio 0.1 ~ 10: 1000 of re dip solution adds ferrous salt or iron filings in re dip solution, mix 0.5 ~ 6 hour; (2) press bariumchloride: the mass ratio 0.1 ~ 10: 1000 of re dip solution adds solid-state bariumchloride or barium chloride solution in the re dip solution of step (1), mix; (3) by oxygenant: the mol ratio 0.1 ~ 10: 1 of ferrous salt or iron filings is added oxygenant in the re dip solution of step (2), stir after 0.5 ~ 3 hour, add the polyacrylamide flocculant of 1 ~ 100ppm, after standing clarification, the sucking-off clear liquid, filter, precipitation is except the radium slag, and clear liquid is except the re dip solution after radium.
- 2. the method except radium according to claim 1, is characterized in that described ferrous salt is iron protochloride, ferrous sulfate or Iron diacetate.
- 3. the method except radium according to claim 1, is characterized in that described oxygenant is hydrogen peroxide or clorox.
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| CN201310068445.9A CN103173617B (en) | 2013-03-05 | 2013-03-05 | Method for removing radium from south ionic rare earth leachate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200247A (en) * | 2015-09-30 | 2015-12-30 | 中铝广西国盛稀土开发有限公司 | Method for improvement of low-grade ore solubility and removal of impurities in feed liquid |
| WO2016041436A1 (en) * | 2014-09-19 | 2016-03-24 | 有研稀土新材料股份有限公司 | Leaching agent and leaching method for leaching rare earth in ion-adsorbed rare earth ore |
| WO2018006437A1 (en) * | 2016-07-08 | 2018-01-11 | 广东省稀有金属研究所 | Method for removing radioactive substances from lanthanum extracting waste water |
| CN108117187A (en) * | 2017-11-29 | 2018-06-05 | 中铝广西国盛稀土开发有限公司 | The process of heavy metal in a kind of intermittent processing RE waste water |
| CN108486372A (en) * | 2018-02-13 | 2018-09-04 | 广西师范大学 | The removal methods of impurity in a kind of Rare Earth Mine leachate |
| CN109999531A (en) * | 2019-02-28 | 2019-07-12 | 宜兴新乐祺纺织印染有限公司 | A kind of production method of low-activity anion nanometer material |
| CN111575508A (en) * | 2020-05-09 | 2020-08-25 | 湛江市红日稀土有限公司 | Method for reducing radioactivity of rare earth feed liquid |
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| CN102491479A (en) * | 2011-12-01 | 2012-06-13 | 核工业北京化工冶金研究院 | Neutralization method for treating alkali wastewater containing uranium |
| CN102491555A (en) * | 2011-12-01 | 2012-06-13 | 核工业北京化工冶金研究院 | Method for removing fluorine in acid uranium process wastewater |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102491479A (en) * | 2011-12-01 | 2012-06-13 | 核工业北京化工冶金研究院 | Neutralization method for treating alkali wastewater containing uranium |
| CN102491555A (en) * | 2011-12-01 | 2012-06-13 | 核工业北京化工冶金研究院 | Method for removing fluorine in acid uranium process wastewater |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016041436A1 (en) * | 2014-09-19 | 2016-03-24 | 有研稀土新材料股份有限公司 | Leaching agent and leaching method for leaching rare earth in ion-adsorbed rare earth ore |
| CN105200247A (en) * | 2015-09-30 | 2015-12-30 | 中铝广西国盛稀土开发有限公司 | Method for improvement of low-grade ore solubility and removal of impurities in feed liquid |
| WO2018006437A1 (en) * | 2016-07-08 | 2018-01-11 | 广东省稀有金属研究所 | Method for removing radioactive substances from lanthanum extracting waste water |
| CN108117187A (en) * | 2017-11-29 | 2018-06-05 | 中铝广西国盛稀土开发有限公司 | The process of heavy metal in a kind of intermittent processing RE waste water |
| CN108486372A (en) * | 2018-02-13 | 2018-09-04 | 广西师范大学 | The removal methods of impurity in a kind of Rare Earth Mine leachate |
| CN108486372B (en) * | 2018-02-13 | 2019-11-08 | 广西师范大学 | The removal methods of impurity in a kind of Rare Earth Mine leachate |
| CN109999531A (en) * | 2019-02-28 | 2019-07-12 | 宜兴新乐祺纺织印染有限公司 | A kind of production method of low-activity anion nanometer material |
| CN109999531B (en) * | 2019-02-28 | 2021-06-15 | 宜兴新乐祺纺织印染有限公司 | Production method of low-radioactivity negative ion nano material |
| CN111575508A (en) * | 2020-05-09 | 2020-08-25 | 湛江市红日稀土有限公司 | Method for reducing radioactivity of rare earth feed liquid |
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| CN103173617B (en) | 2014-07-09 |
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Effective date of registration: 20171227 Address after: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee after: GUANGDONG INSTITUTE OF RARE METALS Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: Guangzhou Research Institute of Non-ferrous Metals |
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Address after: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee after: Institute of rare metals, Guangdong Academy of Sciences Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: GUANGDONG INSTITUTE OF RARE METALS |