CN103572064B - Method for enriching lead and recovering rare earth from rare earth lead slag - Google Patents
Method for enriching lead and recovering rare earth from rare earth lead slag Download PDFInfo
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- CN103572064B CN103572064B CN201310580259.3A CN201310580259A CN103572064B CN 103572064 B CN103572064 B CN 103572064B CN 201310580259 A CN201310580259 A CN 201310580259A CN 103572064 B CN103572064 B CN 103572064B
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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 discloses a method for enriching lead and recovering rare earth from rare earth lead slag. The method comprises the following steps: (1) roasting the rare earth lead slag obtained from sodium sulphide sediment rare earth at the temperature of 750-850 DEG C; (2) adding sulfuric acid of 1-1.5mol/L into the roasted rare earth lead slag, and leaching at the temperature of 80-90 DEG C for more than 40 minutes; (3) conducting solid-liquid separation on the product treated in the step (2), carrying out alkaline transfer and acid dissolving on a liquid supernatant, and then extracting the rare earth; obtaining a lead-enriched product after washing the solid with water. According to the method provided by the invention, the treatment difficulty and cost for a lead-containing waste is greatly reduced, and 40% of the rare earth in the lead slag can be extracted.
Description
Technical field
The invention belongs to rare earth field, be specifically related to a kind of method of enriched lead and recovering rare earth in rare earth lead skim.
Background technology
In existing rare earth method of purification method, with the lead in sodium sulphite removing rare earth, with metal ions such as 40% rare earth compound and a large amount of Fe, Du, Ba, Ga in lead skim generative process; Follow-up lead skim processing cost is high, and rare earth resources is wasted in a large number, and environmental pollution is serious.
Summary of the invention
The object of the invention is to provide a kind of method of enriched lead and recovering rare earth in rare earth lead skim, and solving high, the rare earth resources of processing cost that existing technique exists wastes in a large number, the problem that environmental pollution is serious.
Technical scheme of the present invention is:
In rare earth lead skim, a method for enriched lead and recovering rare earth, comprises the steps:
(1) the rare earth lead skim that sodium sulphite precipitating rare earth obtains is carried out roasting at 750-850 DEG C;
(2) in the rare earth lead skim after roasting, add the sulfuric acid of 1-1.5mol/L, 80-90 DEG C leaches more than 40 minutes;
(3) by step (2) process after product carry out solid-liquid separation, supernatant liquor turns through alkali, acid-soluble after Extraction of rare earth; Solid obtains plumbous enriched substance after washing.
Further, the method that described alkali turns is: 2-2.5mol/L NaOH reacting by heating 7-9 hour.
Further, described acid-soluble method is: the hydrochloric acid leaching of 1-1.5mol/L more than 40 minutes.
Further, the maturing temperature in step (1) is 800 DEG C.
Further, the concentration adding sulfuric acid in step (2) is 1mol/L, leaching time more than 1 hour.
The present invention compared with prior art tool has the following advantages:
Method of the present invention substantially reduces intractability and the cost of lead bearing waste, by 40% Extraction of rare eart contained in lead skim out, according to producing 10000t rare earth capacity calculation year, can recycle rare earth 40t, economic return 4000000 yuan.Lead skim after treatment lead skim amount reduces 40t every year, reduces lead skim processing costs 180000 yuan.
Embodiment
Embodiment 1
In rare earth lead skim, a method for enriched lead and recovering rare earth, comprises the steps:
(1) the rare earth lead skim that sodium sulphite precipitating rare earth obtains is carried out roasting at 750 DEG C;
(2) in the rare earth lead skim after roasting, add the sulfuric acid of 1.5mol/L, 90 DEG C leach 40 minutes;
(3) supernatant liquor after step (2) being processed is siphoned in other retort, turns through alkali, acid-soluble, the Extraction of rare earths such as removal of impurities; The method that alkali turns is: 2mol/L NaOH reacting by heating 9 hours, and acid-soluble method is: the hydrochloric acid leaching of 1.5mol/L 40 minutes.Solid obtains plumbous enriched substance after washing.
Embodiment 2
In rare earth lead skim, a method for enriched lead and recovering rare earth, comprises the steps:
(1) the rare earth lead skim that sodium sulphite precipitating rare earth obtains is carried out roasting at 850 DEG C;
(2) in the rare earth lead skim after roasting, add the sulfuric acid of 1mol/L, 80 DEG C leach 50 minutes;
(3) supernatant liquor after step (2) being processed is siphoned in other retort, turns through alkali, acid-soluble, the Extraction of rare earths such as removal of impurities; The method that alkali turns is: 2.5mol/L NaOH reacting by heating 7 hours, and acid-soluble method is: the hydrochloric acid leaching of 1mol/L 50 minutes.Solid obtains plumbous enriched substance after washing.
Embodiment 3
In rare earth lead skim, a method for enriched lead and recovering rare earth, comprises the steps:
(1) the rare earth lead skim that sodium sulphite precipitating rare earth obtains is carried out roasting at 800 DEG C;
(2) in the rare earth lead skim after roasting, add the sulfuric acid of 1.25mol/L, 85 DEG C leach 50 minutes;
(3) supernatant liquor after step (2) being processed is siphoned in other retort, turns through alkali, acid-soluble, the Extraction of rare earths such as removal of impurities; The method that alkali turns is: 2.3mol/L NaOH reacting by heating 7 hours, and acid-soluble method is: the hydrochloric acid leaching of 1.2mol/L 45 minutes.Solid obtains plumbous enriched substance after washing.
Claims (1)
1. the method for enriched lead and recovering rare earth in rare earth lead skim, is characterized in that, comprise the steps:
(1) the rare earth lead skim that sodium sulphite precipitating rare earth obtains is carried out roasting at 750-850 DEG C;
(2) in the rare earth lead skim after roasting, add the sulfuric acid of 1-1.5mol/L, 80-90 DEG C leaches more than 40 minutes;
(3) by step (2) process after product carry out solid-liquid separation, supernatant liquor turns through alkali, acid-soluble after Extraction of rare earth; Solid obtains plumbous enriched substance after washing; The method that described alkali turns is: 2-2.5mol/L NaOH reacting by heating 7-9 hour; Described acid-soluble method is: the hydrochloric acid leaching of 1-1.5mol/L more than 40 minutes.
2. the method for enriched lead and recovering rare earth in a kind of rare earth lead skim according to claim 1, it is characterized in that, the maturing temperature in step (1) is 800 DEG C.
3. the method for enriched lead and recovering rare earth in a kind of rare earth lead skim according to claim 1, it is characterized in that, the concentration adding sulfuric acid in step (2) is 1mol/L, leaching time more than 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310580259.3A CN103572064B (en) | 2013-11-19 | 2013-11-19 | Method for enriching lead and recovering rare earth from rare earth lead slag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310580259.3A CN103572064B (en) | 2013-11-19 | 2013-11-19 | Method for enriching lead and recovering rare earth from rare earth lead slag |
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| CN103572064A CN103572064A (en) | 2014-02-12 |
| CN103572064B true CN103572064B (en) | 2015-03-11 |
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| CN201310580259.3A Active CN103572064B (en) | 2013-11-19 | 2013-11-19 | Method for enriching lead and recovering rare earth from rare earth lead slag |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087964B (en) * | 2014-05-12 | 2017-04-05 | 广东珠江稀土有限公司 | It is a kind of to remove lead from rare earth extraction saponification waste-water while the technique of recovering rare earth |
| CN107988487A (en) * | 2017-10-30 | 2018-05-04 | 四川英创环保科技有限公司 | A kind of lead skim wet oxidation decomposition technique |
| CN111636001A (en) * | 2020-05-19 | 2020-09-08 | 四川省冕宁县方兴稀土有限公司 | Acid-base combined method for treating bastnaesite and recovering rare earth from waste slag |
| CN113667842B (en) * | 2021-07-14 | 2022-09-20 | 四川省冕宁县方兴稀土有限公司 | Method for removing non-rare earth impurities in rare earth hydrometallurgy |
| CN115058608A (en) * | 2022-06-20 | 2022-09-16 | 淄博灵芝化工有限公司 | Method for recovering rare earth from rare earth lead sulfide zinc slag |
| CN116607010B (en) * | 2023-07-19 | 2023-10-17 | 长沙华时捷环保科技发展股份有限公司 | Method for removing and recovering lead from lead-containing solution |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202460A (en) * | 1998-06-04 | 1998-12-23 | 葛新芳 | Method for producing mixed rare-earth chloride |
| CN101967555A (en) * | 2010-10-25 | 2011-02-09 | 东北大学 | Method for dipping and decomposing bastnaesite after activation |
| CN102399999A (en) * | 2010-09-15 | 2012-04-04 | 北京有色金属研究总院 | Comprehensive recovery process for rare earth and strontium intergrowth multi-metal ore |
| CN102653820A (en) * | 2012-04-24 | 2012-09-05 | 包头稀土研究院 | Method for extracting scandium from baiyuneboite tailings |
-
2013
- 2013-11-19 CN CN201310580259.3A patent/CN103572064B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1202460A (en) * | 1998-06-04 | 1998-12-23 | 葛新芳 | Method for producing mixed rare-earth chloride |
| CN102399999A (en) * | 2010-09-15 | 2012-04-04 | 北京有色金属研究总院 | Comprehensive recovery process for rare earth and strontium intergrowth multi-metal ore |
| CN101967555A (en) * | 2010-10-25 | 2011-02-09 | 东北大学 | Method for dipping and decomposing bastnaesite after activation |
| CN102653820A (en) * | 2012-04-24 | 2012-09-05 | 包头稀土研究院 | Method for extracting scandium from baiyuneboite tailings |
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| CN103572064A (en) | 2014-02-12 |
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Address after: 614803 Jinsu Town, Wutongqiao District, Leshan City, Sichuan Province Patentee after: Leshan Shenghe Rare Earth Co.,Ltd. Address before: 614803 Jinsu Town, Wutongqiao District, Leshan City, Sichuan Province Patentee before: LESHAN SHENGHE RARE EARTH Co.,Ltd. |