CN106145443A - A kind of processing method of Rare Earth Production waste water - Google Patents
A kind of processing method of Rare Earth Production waste water Download PDFInfo
- Publication number
- CN106145443A CN106145443A CN201610619996.3A CN201610619996A CN106145443A CN 106145443 A CN106145443 A CN 106145443A CN 201610619996 A CN201610619996 A CN 201610619996A CN 106145443 A CN106145443 A CN 106145443A
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- China
- Prior art keywords
- rare earth
- waste water
- ammonia
- production waste
- processing method
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F17/00—Compounds of rare earth metals
- C01F17/20—Compounds containing only rare earth metals as the metal element
- C01F17/253—Halides
- C01F17/271—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/003—Downstream control, i.e. outlet monitoring, e.g. to check the treating agents, such as halogens or ozone, leaving the process
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses the processing method of a kind of Rare Earth Production waste water, comprise the steps: that Rare Earth Production waste water is passed through settling tank by (1), supernatant passes through contaminant filter, removes granule foreign；(2) waste water after going the removal of impurity adds the mixture of sodium carbonate and sodium acid carbonate, makes rare earth element precipitate, separate solid-liquid, in solid phase, add hydrochloric acid, obtain rare earth chloride；(3) liquid phase after separating step (2) is passed through sedimentation basin, alkali is added in sedimentation basin, regulation pH value is to 10 13, by overflow manner, waste water is incorporated in intermediate water tank after standing, utilize elevator pump by waste water extracting in intermediate water tank to ammonia abjection device, in ammonia abjection device, ammonia nitrogen is transformed into ammonia, utilizes vavuum pump to be pumped into ammonia in gas-liquid separator；Draining after ammonia abjection device process for the detection, ammonia nitrogen is up to standard i.e. directly to be discharged through drainpipe.Treating capacity is big, processes step simple, can realize industrialized application.
Description
Technical field
The invention belongs to Rare Earth Production field, be specifically related to the processing method of a kind of Rare Earth Production waste water.
Background technology
Rare earth element has the physical properties such as excellent light, electricity, magnetic, superconduction, catalysis, can be each with other materials component property
New material different, various in style, is referred to as " the industry monosodium glutamate " in the present age.Rare earth material is each national economy and national defense industry
Individual field has been widely used, and plays an important role in contemporary society's economy and high-tech numerous areas.But, in recent years with
The expansion further of Rare-earth Industry scale, rare-earth trade is in smelting separation, and the wastewater flow rate of annual discharge reaches more than 2,000 ten thousand tons,
Waste water contains substantial amounts of rare earth, it was reported that China's rare earth yield in recent years is 120,000 tons/year, and recovery rate only up to reach
96～97%, namely the rare earth up to 4000 tons/year running off with low dense state with waste water, these discharge one sides containing RE waste water
Face causes the loss of valuable rare earth resources, on the other hand also result in environmental pollution.
The work reclaiming research of current rare earth is mainly towards used rare-earth products.For example for rare earth
Loss in process for the magnetic material or rare earth discard magnetic material, many researchers utilize multiple method therefrom reclaim Nd, Tb,
The rare earths such as Dy (M.Itoh, J.Alloys Compd., 2009,477,484-487；T.Saito,ScriptaMater,2004,
51,1069–1073.).Mei Guangjun etc. have studied multiple methods (Mei Guangjun, the regeneration extracting Y, Eu rare earth element from fluorescent lamp
The Study on Resources, 2007,6:29-35).Owing to rare earth removal process is extremely complex and it is necessary to through physics and chemical treatment, lead
Cause with high costs, up to the present also there is no rare earth in the middle of magnet material, battery, illuminating lamp, catalyst for the large-scale application
Recycling engineering.
Chinese invention patent application " Rare-earth Mine slag and effluent administers trace rare-earth recovery process " (CN101979335A)
Use lime as precipitating reagent, make rare earth ion generate hydroxide precipitation and separate with waste water, although the method is simple, but due to
The water yield is big, needs to adjust pH could discharge to neutrality with acid is anti-.The efficiency of other the method recovering rare earth is undesirable.Chinese invention is special
Profit application " technique of recovering rare earth from waste water from rare earth mine exploitation by precipitation-extraction " (CN101974690A) uses hydroxide
The method recovering rare earth that calcium precipitate and P507 organic extraction combine, rare earth yield can reach more than 85%, this method
Extractant solution loss is big, and cost is high, is easily generated secondary pollution, and also to be taken by sedimentation basin clarification filtration large-area
Land resource.
Chinese invention patent application is " with the side of recovering rare earth from low-concentration rare earth solution through prussian blue colloidal nanoparticles
Method " (CN102352448A) utilizes Prussian blue colloidal nanoparticles as adsorbent, by dialyser recovering rare earth, this side
Method rare earth organic efficiency is higher but there is also the problem that cost is high, treating capacity is little simultaneously.Additionally, use resin adsorption method also to compare
Simply, but load capacity is little, resin cost is high, and rare earth resolves more difficulty.
Content of the invention
It is an object of the present invention to provide the processing method of a kind of Rare Earth Production waste water, solve existing RE waste water processing cost
Problem high, that treating capacity is little.
The technical scheme is that the processing method of a kind of Rare Earth Production waste water, comprise the steps:
(1) Rare Earth Production waste water being passed through settling tank, supernatant passes through contaminant filter, removes granule foreign；
(2) waste water after going the removal of impurity adds the mixture of sodium carbonate and sodium acid carbonate, makes rare earth element precipitate, point
From solid-liquid, in solid phase, add hydrochloric acid, obtain rare earth chloride；
(3) by step (2) separate after liquid phase be passed through sedimentation basin, in sedimentation basin add alkali, regulation pH value to 10-13,
By overflow manner, waste water is incorporated in intermediate water tank after standing, utilizes elevator pump to extract waste water in intermediate water tank to ammonia
In abjection device, in ammonia abjection device, ammonia nitrogen is transformed into ammonia, utilizes vavuum pump to be pumped into ammonia in gas-liquid separator；Detection warp
Draining after ammonia abjection device process, ammonia nitrogen is up to standard i.e. directly to be discharged through drainpipe.
Further, described contaminant filter is quartz filter, ceramic filter, the one in active carbon filter
Or multiple combinations.
Further, in the mixture of sodium carbonate and sodium acid carbonate, the mol ratio of sodium carbonate and sodium acid carbonate is: 1 0.8-
1.5。
Further, the concentration of hydrochloric acid is 0.5-2mol/L.
Further, in step (3), alkali is NaOH.
The present invention compared with prior art has the advantage that
In the present invention, using sedimentation after-filter removal of impurities, being subsequently adding alkaline precipitating agent makes waste water rare earth elements precipitate,
Then using watery hydrochloric acid recovering rare earth, waste liquid removes ammonia nitrogen by ammonia abjection device, has treating capacity big, processes step simply excellent
Point, can realize industrialized application.
Detailed description of the invention
Embodiment 1
The processing method of a kind of Rare Earth Production waste water, comprises the steps:
(1) Rare Earth Production waste water being passed through settling tank, supernatant passes through quartz filter, removes granule foreign；
(2) waste water after going the removal of impurity adds mixture, sodium carbonate and the sodium acid carbonate of sodium carbonate and sodium acid carbonate
Mol ratio be: 1 0.8, make rare earth element precipitate, separate solid-liquid, in solid phase add 0.5mol/L hydrochloric acid, obtain chlorination dilute
Soil；
(3) liquid phase after separating step (2) is passed through sedimentation basin, adds NaOH in sedimentation basin, and regulation pH value arrives
10, by overflow manner, waste water is incorporated in intermediate water tank after standing, utilizes elevator pump to extract extremely waste water in intermediate water tank
In ammonia abjection device, in ammonia abjection device, ammonia nitrogen is transformed into ammonia, utilizes vavuum pump to be pumped into ammonia in gas-liquid separator；Inspection
Surveying the draining after processing through ammonia abjection device, ammonia nitrogen is up to standard i.e. directly to be discharged through drainpipe.
Embodiment 2
The processing method of a kind of Rare Earth Production waste water, comprises the steps:
(1) Rare Earth Production waste water being passed through settling tank, supernatant passes through ceramic filter, removes granule foreign；
(2) waste water after going the removal of impurity adds mixture, sodium carbonate and the sodium acid carbonate of sodium carbonate and sodium acid carbonate
Mol ratio be: 1 1.5, make rare earth element precipitate, separate solid-liquid, in solid phase add 2mol/L hydrochloric acid, obtain rare earth chloride；
(3) liquid phase after separating step (2) is passed through sedimentation basin, adds NaOH in sedimentation basin, and regulation pH value arrives
12, by overflow manner, waste water is incorporated in intermediate water tank after standing, utilizes elevator pump to extract extremely waste water in intermediate water tank
In ammonia abjection device, in ammonia abjection device, ammonia nitrogen is transformed into ammonia, utilizes vavuum pump to be pumped into ammonia in gas-liquid separator；Inspection
Surveying the draining after processing through ammonia abjection device, ammonia nitrogen is up to standard i.e. directly to be discharged through drainpipe.
Embodiment 3
The processing method of a kind of Rare Earth Production waste water, comprises the steps:
(1) Rare Earth Production waste water being passed through settling tank, supernatant passes through quartz filter and active carbon filter, removes
Granule foreign；
(2) waste water after going the removal of impurity adds mixture, sodium carbonate and the sodium acid carbonate of sodium carbonate and sodium acid carbonate
Mol ratio be: 1 1.2, make rare earth element precipitate, separate solid-liquid, in solid phase add 1mol/L hydrochloric acid, obtain rare earth chloride；
(3) liquid phase after separating step (2) is passed through sedimentation basin, adds NaOH in sedimentation basin, and regulation pH value arrives
11, by overflow manner, waste water is incorporated in intermediate water tank after standing, utilizes elevator pump to extract extremely waste water in intermediate water tank
In ammonia abjection device, in ammonia abjection device, ammonia nitrogen is transformed into ammonia, utilizes vavuum pump to be pumped into ammonia in gas-liquid separator；Inspection
Surveying the draining after processing through ammonia abjection device, ammonia nitrogen is up to standard i.e. directly to be discharged through drainpipe.
Embodiment described above only have expressed the detailed description of the invention of the application, and it describes more concrete and detailed, but simultaneously
Therefore the restriction to the application protection domain can not be interpreted as.It should be pointed out that, for those of ordinary skill in the art
For, on the premise of conceiving without departing from technical scheme, some deformation can also be made and improve, these broadly fall into this
The protection domain of application.
Claims (5)
1. the processing method of a Rare Earth Production waste water, it is characterised in that comprise the steps:
(1) Rare Earth Production waste water being passed through settling tank, supernatant passes through contaminant filter, removes granule foreign；
(2) waste water after going the removal of impurity adds the mixture of sodium carbonate and sodium acid carbonate, makes rare earth element precipitate, separate solid
Liquid, adds hydrochloric acid in solid phase, obtains rare earth chloride；
(3) liquid phase after separating step (2) is passed through sedimentation basin, adds alkali in sedimentation basin, and regulation pH value, to 10-13, stands
By overflow manner, waste water is incorporated in intermediate water tank afterwards, utilizes elevator pump by waste water extracting in intermediate water tank to ammonia abjection
In device, in ammonia abjection device, ammonia nitrogen is transformed into ammonia, utilizes vavuum pump to be pumped into ammonia in gas-liquid separator；Detection is through ammonia
Draining after abjection device process, ammonia nitrogen is up to standard i.e. directly to be discharged through drainpipe.
2. the processing method of a kind of Rare Earth Production waste water according to claim 1, it is characterised in that described contaminant filter
For the combination of one or more in quartz filter, ceramic filter, active carbon filter.
3. the processing method of a kind of Rare Earth Production waste water according to claim 1, it is characterised in that sodium carbonate and bicarbonate
In the mixture of sodium, the mol ratio of sodium carbonate and sodium acid carbonate is: 1 0.8-1.5.
4. the processing method of a kind of Rare Earth Production waste water according to claim 1, it is characterised in that the concentration of hydrochloric acid is
0.5-2mol/L。
5. the processing method of a kind of Rare Earth Production waste water according to claim 1, it is characterised in that in step (3), alkali is
NaOH.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610619996.3A CN106145443A (en) | 2016-07-29 | 2016-07-29 | A kind of processing method of Rare Earth Production waste water |
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| CN201610619996.3A CN106145443A (en) | 2016-07-29 | 2016-07-29 | A kind of processing method of Rare Earth Production waste water |
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| CN201610619996.3A Pending CN106145443A (en) | 2016-07-29 | 2016-07-29 | A kind of processing method of Rare Earth Production waste water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607858A (en) * | 2018-12-20 | 2019-04-12 | 全南包钢晶环稀土有限公司 | Liquid waste treating apparatus is used in a kind of production of rare earth metal |
| CN110408778A (en) * | 2019-07-02 | 2019-11-05 | 江西万弘高新技术材料有限公司 | A kind of heavy rare earth of sodium carbonate and sodium bicarbonate mixed precipitation |
| CN110776182A (en) * | 2019-10-24 | 2020-02-11 | 华新绿源(内蒙古)环保产业发展有限公司 | Method for comprehensively treating rare earth ammonia nitrogen wastewater in rare earth alkaline leaching process |
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| CN101353178A (en) * | 2002-06-07 | 2009-01-28 | 昭和电工株式会社 | Process for recovering rare earth oxide, process for producing abrasive containing rare earth oxide and polishing method using abrasive |
| CN103570158A (en) * | 2013-11-06 | 2014-02-12 | 中国地质大学（武汉） | Method for recovering rare earth from rare earth production wastewater and implementing up-to-standard release of ammonia nitrogen |
| CN104774561A (en) * | 2015-03-27 | 2015-07-15 | 南昌大学 | Method for preparing rare earth polishing powder and recovering ammonium salt by using fluorine-containing niobium-tantalum wastewater |
| CN105293772A (en) * | 2015-11-17 | 2016-02-03 | 中国地质大学（武汉） | Method for recovering of rare earth and resource utilization of ammonia nitrogen from rare earth processing and smelting wastewater |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101353178A (en) * | 2002-06-07 | 2009-01-28 | 昭和电工株式会社 | Process for recovering rare earth oxide, process for producing abrasive containing rare earth oxide and polishing method using abrasive |
| CN1807253A (en) * | 2006-01-18 | 2006-07-26 | 朴钟殷 | Method for treating tail gas and waste water from rare earth finished ore acid method burning process |
| CN103570158A (en) * | 2013-11-06 | 2014-02-12 | 中国地质大学（武汉） | Method for recovering rare earth from rare earth production wastewater and implementing up-to-standard release of ammonia nitrogen |
| CN104774561A (en) * | 2015-03-27 | 2015-07-15 | 南昌大学 | Method for preparing rare earth polishing powder and recovering ammonium salt by using fluorine-containing niobium-tantalum wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607858A (en) * | 2018-12-20 | 2019-04-12 | 全南包钢晶环稀土有限公司 | Liquid waste treating apparatus is used in a kind of production of rare earth metal |
| CN110408778A (en) * | 2019-07-02 | 2019-11-05 | 江西万弘高新技术材料有限公司 | A kind of heavy rare earth of sodium carbonate and sodium bicarbonate mixed precipitation |
| CN110776182A (en) * | 2019-10-24 | 2020-02-11 | 华新绿源(内蒙古)环保产业发展有限公司 | Method for comprehensively treating rare earth ammonia nitrogen wastewater in rare earth alkaline leaching process |
| CN110776182B (en) * | 2019-10-24 | 2022-02-08 | 华新绿源(内蒙古)环保产业发展有限公司 | Method for comprehensively treating rare earth ammonia nitrogen wastewater in rare earth alkaline leaching process |
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