CN101683998B - One-step production method for cerium poor rare earth fluoride and cerium fluoride - Google Patents
One-step production method for cerium poor rare earth fluoride and cerium fluoride Download PDFInfo
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- CN101683998B CN101683998B CN2008100461464A CN200810046146A CN101683998B CN 101683998 B CN101683998 B CN 101683998B CN 2008100461464 A CN2008100461464 A CN 2008100461464A CN 200810046146 A CN200810046146 A CN 200810046146A CN 101683998 B CN101683998 B CN 101683998B
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Abstract
The invention relates to a non-ferrous metal rare-earth separating method, concretely, a one-step production method for cerium poor rare earth fluoride and cerium fluoride, wherein the one-step production method for cerium poor rare earth fluoride and cerium fluoride, comprising the following steps of: A. oxidizing and roasting rare-earth ore concentrate; B. selectively dissolving the rare-earth ore concentrate with dilute hydrochloric acid after oxidizing roasting, and adding a catalyst; C. filtrating and separating the SLAG and the solution after selective dissolution. The method of the invention can implement zero discharge of waste water, reduce the cost, increase product value, decrease process flow, and reduce labor strength.
Description
Technical field
The present invention relates to the non-ferrous metal Rare Earth Separation, be specially few cerium rare earth chloride, cerium fluoride one step production method.
Background technology
At present widely used cerium rare earth chloride working system the steps include: that oxidizing roasting, hydrochloric acid are excellently dissolved in the industry, filtration, filter residue alkali are changeed, 11～13 washings, filter; Two suboptimums dissolve, filter; Three suboptimums dissolve, filter.There is following problem and shortage in such technology: the ore deposit after the roasting through repeatedly excellently dissolve, alkali changes, washing, filter, technical process is long; Because flow process need repeat repeatedly to carry slag repeatedly, labour intensity is big; After changeing, filter residue alkali needs washing, fluorine-containing and alkali in the rinsing solution, and the emission of serious pollution of environment of this waste water, high to the cost of its improvement, difficulty is big; Such technology is low to equipment efficiency of usage; The alkali commentaries on classics needs 0.28 ton of/ton ore deposit of consumable liquid sodium hydroxide; Alkali turns over also needs whole day 24 hours that the temperature in the alkali turn trough is remained on 100～120 degree in the journey; Consume a large amount of electric energy and water vapour, the alkali cake after alkali changes also needs a large amount of water and flocculation agent lotion alkali cake, and cost is high; Directly the fluorine of discharging is the product of demand on the market on the contrary.
Summary of the invention
The present invention is just to above environmental protection and technical problem, provides a kind of and can realize wastewater zero discharge, reduces cost, increases value of the product, reduces technical process, reduces few cerium rare earth chloride, cerium fluoride one step production method of labour intensity.
Concrete scheme of the present invention is following:
Few cerium rare earth chloride, cerium fluoride one step production method may further comprise the steps:
A, rare earth ore concentrate oxidizing roasting;
B, the rare earth ore concentrate after the oxidizing roasting carried out Hydrogen chloride is excellent to be dissolved, and add catalyzer;
C, slag, solution after excellent dissolve are carried out filtering separation.
Catalyzer is the salt of sulfuric acid or nitric acid or perchloric acid or hypochlorous acid or potassium permanganate or ydrogen peroxide 50 or other mineral acids or other organic acids or strong acid and strong base generation.
In the excellent molten process of Hydrogen chloride, add catalyzer; Make cerium participate in reaction, utilize the preferential complex scheme of fluorine, make cerium and fluorion in the liquid state generate cerium fluoride and get into slag; Trivalent rare earth gets into liquid; Thereby the purity of cerium in the raising solids reduces the content of cerium in the liquid state, reaches that conventional multi is excellently dissolved, alkali changes isolating effect.
Positively effect of the present invention shows:
(1) realized fluorine-containing alkaline waste water zero release;
(2) reduce alkali commentaries on classics, washing etc. and repeated operation;
(3) auxiliary material, energy consumption reduce significantly;
(4) manual work is reduced to 40% of old technology;
(5) average ore per ton reduces by 1750 yuan of costs than original technology;
(6) technology of the present invention defluorination not, the fluorine discharging reduces by 60～80 kilograms of/ton ore deposits;
(7) plant efficiency can improve 60%;
Description of drawings
Fig. 1 is a schematic flow sheet of the present invention;
Fig. 2 is existing process flow diagram.
Embodiment
Below in conjunction with embodiment the present invention is described further.
Specific embodiment 1:
Few cerium rare earth chloride, cerium fluoride one step production method may further comprise the steps:
D, rare earth ore concentrate oxidizing roasting;
E, the rare earth ore concentrate after the oxidizing roasting carried out Hydrogen chloride is excellent to be dissolved, and add catalyzer;
F, slag, solution after excellent dissolve are carried out filtering separation.
Described catalyzer is 5% sulfuric acid, and add-on is 0.8% of a hydrochloric acid consumption, and the adding method is to add earlier or add simultaneously, and the content that cerium among the rare figure of the rich lanthanum chlorination of cerium is lacked in excellent molten back is 6～18%, and the content of the cerium in the rich cerium slag is for being not less than 93%.
In the excellent molten process of Hydrogen chloride, add catalyzer; Make cerium participate in reaction, utilize the preferential complex scheme of fluorine, make cerium and fluorion in the liquid state generate cerium fluoride and get into slag; Trivalent rare earth gets into liquid; Thereby the purity of cerium in the raising solids reduces the content of cerium in the liquid state, reaches that conventional multi is excellently dissolved, alkali changes isolating effect.
Specific embodiment 2:
Few cerium rare earth chloride, cerium fluoride one step production method may further comprise the steps:
G, rare earth ore concentrate oxidizing roasting;
H, the rare earth ore concentrate after the oxidizing roasting carried out Hydrogen chloride is excellent to be dissolved, and add catalyzer;
I, slag, solution after excellent dissolve are carried out filtering separation.
Described an acidic catalyst is 8% nitric acid, and add-on is 0.8% of a hydrochloric acid consumption, and the adding method is to add earlier or add simultaneously, and the content that cerium in the cerium lanthanum concentrate rare earth chloride is lacked in excellent molten back is 6～18%, and the content of the cerium in the rich cerium slag is for being not less than 93%.
Claims (1)
1. few cerium rare earth chloride, cerium fluoride one one-step production method may further comprise the steps:
A, rare earth ore concentrate oxidizing roasting;
B, the rare earth ore concentrate after the oxidizing roasting carried out Hydrogen chloride is excellent to be dissolved, and add sulfuric acid or nitric acid or perchloric acid or hypochlorous acid or potassium permanganate or ydrogen peroxide 50; Make cerium participate in reaction, utilize the preferential complex scheme of fluorine, make cerium and fluorion in the liquid state generate cerium fluoride and get into slag, trivalent rare earth gets into liquid;
C, slag, solution after excellent dissolve are carried out filtering separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100461464A CN101683998B (en) | 2008-09-24 | 2008-09-24 | One-step production method for cerium poor rare earth fluoride and cerium fluoride |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100461464A CN101683998B (en) | 2008-09-24 | 2008-09-24 | One-step production method for cerium poor rare earth fluoride and cerium fluoride |
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| Publication Number | Publication Date |
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| CN101683998A CN101683998A (en) | 2010-03-31 |
| CN101683998B true CN101683998B (en) | 2012-02-29 |
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| CN2008100461464A Active CN101683998B (en) | 2008-09-24 | 2008-09-24 | One-step production method for cerium poor rare earth fluoride and cerium fluoride |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020030084A1 (en) * | 2018-08-10 | 2020-02-13 | 有研稀土新材料股份有限公司 | Process for smelting and separating rare earth concentrate using combination method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102399982A (en) * | 2010-09-10 | 2012-04-04 | 周毅 | Bastnaesite (bastnasite) separation method based on mixed acid |
| CN102399983A (en) * | 2010-09-10 | 2012-04-04 | 周毅 | Bastnaesite (bastnasite) separation method |
| CN103374652B (en) * | 2012-09-29 | 2015-04-22 | 有研稀土新材料股份有限公司 | Method for comprehensively recycling rare earth and fluorine in process of treating bastnaesite |
| CN106916975B (en) * | 2017-03-07 | 2018-08-14 | 四川省冕宁县方兴稀土有限公司 | A method of the Extraction of rare earth from iron thorium waste residue |
-
2008
- 2008-09-24 CN CN2008100461464A patent/CN101683998B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 姜海珍等."氟碳铈镧精矿制取氯化稀土的研究".《江西有色金属》.2002,第16卷(第3期),第24-26页. |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020030084A1 (en) * | 2018-08-10 | 2020-02-13 | 有研稀土新材料股份有限公司 | Process for smelting and separating rare earth concentrate using combination method |
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| CN101683998A (en) | 2010-03-31 |
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Owner name: LESHAN SHENGHE RARE EARTH CO., LTD. Free format text: FORMER OWNER: EMEISHAN KESHENG RARE EARTH TECHNOLOGY CO., LTD. Effective date: 20110303 |
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Effective date of registration: 20110303 Address after: 614803 Golden Millet Town, five pass, Sichuan, Leshan Applicant after: LESHAN SHENGHE RARE EARTH Co.,Ltd. Address before: 610000 No. 86 Jinding South Road, Mount Emei, Sichuan Applicant before: EMEISHAN KESHENG RARE EARTH TECHNOLOGY Co.,Ltd. |
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Address after: Jinsu Town, Wutong District, Leshan City, Sichuan Province 614803 Patentee after: Leshan Shenghe Rare Earth Co.,Ltd. Address before: Jinsu Town, Wutong District, Leshan City, Sichuan Province 614803 Patentee before: LESHAN SHENGHE RARE EARTH Co.,Ltd. |
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