CN108298714A - The method of FLUORIDE REMOVAL IN WASTEWATER in the refining separation of fluorine carbon cerium mischmetal mining and metallurgy - Google Patents
The method of FLUORIDE REMOVAL IN WASTEWATER in the refining separation of fluorine carbon cerium mischmetal mining and metallurgy Download PDFInfo
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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
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C02F2101/14—Fluorine or fluorine-containing compounds
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- 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
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention discloses the methods of FLUORIDE REMOVAL IN WASTEWATER in a kind of refining separation of fluorine carbon cerium mischmetal mining and metallurgy, are related to fluorine carbon cerium mischmetal mining and metallurgy refining separation field.The method of FLUORIDE REMOVAL IN WASTEWATER carries out fluorine removal as defluorinating agent using the waste water for containing high concentration calcium salt of chlorination system in the refining separation of fluorine carbon cerium mischmetal mining and metallurgy to high fluorine waste water in the fluorine carbon cerium mischmetal mining and metallurgy refining separation of the present invention, by the wastewater reuse containing high concentration calcium salt in chlorination system, two kinds of each self-dischargings of waste water are avoided, environmentally friendly cost is substantially reduced；Impurity is few in defluorinating agent, and pH is relatively low, and defluorination effect is good, reaches national grade one discharge standard, saves two level, three-level depth fluorine removal process, saves the time；During fluorine removal, the yield of calcirm-fluoride reaches 70%, refines the byproduct in separation process as fluorine carbon cerium mischmetal mining and metallurgy, additional profit is high.
Description
Technical field
The present invention relates to fluorine carbon cerium mischmetal mining and metallurgys to refine separation field, gives up in especially a kind of fluorine carbon cerium mischmetal mining and metallurgy refining separation
The method of water fluoridation.
Background technology
Bastnaesite is the main mineral of global Rare-earth Industry, and representative mine mainly has U.S. awns court of a feudal ruler Paasche dilute
Native mine, sichuan yak level ground mine and packet header Bayan Obo mischmetal mine and Shandong Weishan Lake Rare Earth Mine.
Sichuan bastnaesite fluorine content is 6% or so, using " oxidizing roasting-salt Ore Leaching-high-temperature alkali conversion-washing pressure
Filter-second of hydrochloric acid leaching-purification of leaching liquor removal of impurities-extraction and separation-precipitation-calcining " technique.Wherein washing press filtration process can produce
Raw high fluorine alkali waste water, fluorine content is in 6g/L or so.
The traditional chemical precipitation method are calcium salt to the common precipitating reagent of FLUORIDE REMOVAL IN WASTEWATER, such as:Quick lime, milk of lime, calcium chloride etc..
By adding the medicament of calcium ions into waste water, fluorine ion is converted to the CaF of indissoluble2Precipitation, ion-reaction equation Ca2
++2F-→CaF2↓.When quick lime or milk of lime fluorine removal is used alone, even if pH value reaches the fluorine content in 12 or more water outlets
In 20-50mg/L or so, it is unable to reach national grade one discharge standard, needs to carry out two level, three-level depth fluorine removal.High fluorine alkali waste water
The main reason for middle fluorine is difficult to disposably eliminate be：On the one hand because of SO in waste water4 2-、CO3 2-Ionic adsorption generates in the reaction
CaF2On particle, CaF is influenced2The quick progress of reaction of formation；On the other hand since the solubility of milk of lime is smaller, fail to carry
For sufficient Ca2+Make trip at CaF2Precipitation.With water-soluble preferable calcium salt (such as CaCl2) it is used as precipitating reagent, although water outlet fluorine
Ion can reach discharge standard, but expense is too high that certain environmentally friendly cost pressure is brought to enterprise.
Invention content
The goal of the invention of the present invention is：In view of the above problems, a kind of fluorine carbon cerium mischmetal mining and metallurgy refining separation is provided
The method of middle FLUORIDE REMOVAL IN WASTEWATER, chlorination system is useless containing high concentration calcium salt during this method is detached using the refining of fluorine carbon cerium mischmetal mining and metallurgy
Water realizes the recycling of waste water, zero cost as defluorinating agent；Defluorination effect is good, saves two level, three-level depth fluorine removal work
Sequence saves the time；Calcirm-fluoride yield is high, and additional profit is high.
The technical solution adopted by the present invention is as follows：
The method of FLUORIDE REMOVAL IN WASTEWATER in the refining separation of fluorine carbon cerium mischmetal mining and metallurgy comprising following steps：
(1) it collects alkali and turns high fluorine waste water, be aerated through wind turbine uniform；
(2) salt acid for adjusting pH is added into high fluorine waste water to 9-11；
(3) defluorinating agent being put into high fluorine waste water, precipitation reaction being carried out to fluorine, defluorinating agent is the refining point of fluorine carbon cerium mischmetal mining and metallurgy
The waste water containing high concentration calcium salt from chlorination system in the process；
(4) hydrochloric acid is added and adjusts the wastewater pH after reaction to 6-9；
(5) flocculant is added to flocculate to form alumen ustum, discharged wastewater met the national standard after filtering.
Using " oxidizing roasting-salt Ore Leaching-high-temperature alkali converts-washes press filtration-second of hydrochloric acid leaching-purification of leaching liquor
During the technique of removal of impurities-extraction and separation-precipitation-calcining " smelts separation bastnaesite, not only it will produce in washing press filtration process
High fluorine alkali waste water also will produce in second salt Ore Leaching, hydrochloric acid of leaching level-one extraction separation process and largely contain high concentration
The waste water of calcium salt.In conventional procedure, high fluorine waste water and the waste water containing high concentration calcium salt discharge after handling respectively.In the present invention,
Using the waste water for containing high concentration calcium salt from chlorination system in separation process of smelting as defluorinating agent, high fluorine waste water is carried out
Processing, realizes the recycling of calcic waste water, reduces cost；The waste water impurity containing high concentration calcium salt of chlorination system is few,
PH is relatively low, and defluorination effect is good, reaches national grade one discharge standard, saves two level, three-level depth fluorine removal process, when saving
Between；The yield of calcirm-fluoride reaches 70%, refines the byproduct in separation process as fluorine carbon cerium mischmetal mining and metallurgy, additional profit is high.
The method that a kind of Rare Earth Mine of the present invention smelts FLUORIDE REMOVAL IN WASTEWATER in separation in step (2), is added into high fluorine waste water
Salt acid for adjusting pH is to 10.
By adopting the above-described technical solution, the calcium fluoride particles formed under this condition are larger, it is not easy to form colloidal dispersion,
System viscosity is reduced, reaction is more abundant.
The method that a kind of Rare Earth Mine of the present invention smelts FLUORIDE REMOVAL IN WASTEWATER in separation in step (3), is added into high fluorine waste water
Before defluorinating agent, the fluorinated volume in high fluorine waste water is detected, testing result is denoted as c1, the addition volume V of defluorinating agent2Under
Formula calculates：V2=(V1×c1×N×(1.1-1.3))/c2, wherein V1For high fluorine wastewater volume, c2For fluorine removal agent concentration, N is small
It has a try and tests proportionality coefficient, (1.1-1.3) is excess coefficient.
By adopting the above-described technical solution, giving the optimum response ratio between defluorinating agent and high fluorine waste water, wherein
N is small-scale experiment proportionality coefficient, i.e. the theoretical proportions coefficient of the two reaction, and in different technical process, value is different, should
Coefficient is obtained by small-scale experiment.(1.1-1.3) is excess coefficient, i.e., after obtaining theoretical proportions coefficient according to small-scale experiment, according to
Excessive defluorinating agent is added in excess coefficient, so that fluorine is deposited completely, wherein volume unit m3, concentration unit g/L.
The method that a kind of Rare Earth Mine of the present invention smelts FLUORIDE REMOVAL IN WASTEWATER in separation, in step (3), the addition speed of defluorinating agent
For 5-15m3/h。
By adopting the above-described technical solution, vigorous reaction during fluorine removal is avoided to form a large amount of jellies and influence fluorine removal
Effect.
The method that a kind of Rare Earth Mine of the present invention smelts FLUORIDE REMOVAL IN WASTEWATER in separation, which is characterized in that described in step (5)
Flocculant is polyacrylamide.
The method that a kind of Rare Earth Mine of the present invention smelts FLUORIDE REMOVAL IN WASTEWATER in separation, the polyacrylamide are cationic,
And it is the solution that mass concentration is 2-3 ‰.
The method that a kind of Rare Earth Mine of the present invention smelts FLUORIDE REMOVAL IN WASTEWATER in separation, high fluorine waste water and cationic polyacrylamide
The ratio between volume of solution is 45-55:1.
By adopting the above-described technical solution, cationic polyacrylamide rapidly flocculates the calcirm-fluoride of generation at big
Grain precipitation, avoids the formation of colloidal dispersion, influences defluorination effect.
The method that a kind of Rare Earth Mine of the present invention smelts FLUORIDE REMOVAL IN WASTEWATER in separation after forming alumen ustum, stops aeration immediately.
It should be noted that alumen ustum is substantially calcium fluoride precipitate, in flocculation process, usually flocculation at snowflake state,
It is referred to as alumen ustum in the art.Alumen ustum should stop being aerated immediately after being formed, and influence sedimentation effect to avoid all flowers are smashed.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. fluorine removal is carried out to high fluorine waste water using the waste water for containing high concentration calcium salt in chlorination system as defluorinating agent, by chlorination
Wastewater reuse containing high concentration calcium salt in system avoids two kinds of each self-dischargings of waste water, substantially reduces environmentally friendly cost.
2. the waste water impurity containing high concentration calcium salt of chlorination system is few, pH is relatively low, and defluorination effect is good, reaches country
First discharge standard saves two level, three-level depth fluorine removal process, saves the time.
3. the yield of calcirm-fluoride reaches 70%, the byproduct in separation process is refined as fluorine carbon cerium mischmetal mining and metallurgy, adds profit
Profit is high.
Description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the process flow chart of the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy refining separation provided by the invention.
Specific implementation mode
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, abstract), unless specifically stated,
It is replaced by other equivalent or with similar purpose alternative features.That is, unless specifically stated, each feature is a series of
An example in equivalent or similar characteristics.
Embodiment 1
The present embodiment provides the method for FLUORIDE REMOVAL IN WASTEWATER in a kind of refining separation of fluorine carbon cerium mischmetal mining and metallurgy, this method uses fluorine carbon cerium
Rare Earth Mine smelts the waste water for containing high concentration calcium salt of chlorination system in separation as defluorinating agent, realizes the repetition profit of waste water
With zero cost；Defluorination effect is good, saves two level, three-level depth fluorine removal process, saves the time；Calcirm-fluoride yield is high, additional profit
It is high.As shown in Figure 1, this method is as follows：
Step 1：The high fluorine waste water after alkali turns is collected, its volume is denoted as V1, it is aerated through wind turbine uniform.
Step 2：Hydrochloric acid is added into high fluorine waste water and adjusts its pH to 9.
Step 3：The concentration for detecting high fluorine fluorine in wastewater, is denoted as c1, defluorinating agent is then added to precipitate fluorine.Fluorine removal is added
Agent volume V2=(V1×c1×N×1.1)/c2, wherein V1For high fluorine wastewater volume, c2For calcium ion concentration in defluorinating agent, N is
Small-scale experiment proportionality coefficient, 1.1 be excess coefficient.Defluorinating agent is that fluorine carbon cerium mischmetal mining and metallurgy is refined chlorination system in separation process and contained
There is the waste water of high concentration calcium salt, the addition speed control of defluorinating agent is in 5m3/h。
Step 4：Be added hydrochloric acid adjust precipitation after waste water to its pH be 6.
Step 5：Cationic-type polyacrylamide solution is added into high fluorine waste water the calcirm-fluoride fine grained of formation flocculates
At bulky grain.The mass concentration of cationic-type polyacrylamide anions in solution type polyacrylamide be 2 ‰, high fluorine waste water with
The ratio between volume of cationic-type polyacrylamide solution is 45:1.
Step 6：When the flocculation of calcirm-fluoride fine grained is at macroscopic alumen ustum, stop aeration immediately, completely after precipitation, mistake
Filter, discharged wastewater met the national standard.
Embodiment 2
The present embodiment provides the method for FLUORIDE REMOVAL IN WASTEWATER in a kind of refining separation of fluorine carbon cerium mischmetal mining and metallurgy, this method uses fluorine carbon cerium
Rare Earth Mine smelts the waste water for containing high concentration calcium salt of chlorination system in separation as defluorinating agent, realizes the repetition profit of waste water
With zero cost；Defluorination effect is good, saves two level, three-level depth fluorine removal process, saves the time；Calcirm-fluoride yield is high, additional profit
It is high.As shown in Figure 1, this method is as follows：
Step 1：The high fluorine waste water after alkali turns is collected, its volume is denoted as V1, it is aerated through wind turbine uniform.
Step 2：Hydrochloric acid is added into high fluorine waste water and adjusts its pH to 10.
Step 3：The concentration for detecting high fluorine fluorine in wastewater, is denoted as c1, defluorinating agent is then added to precipitate fluorine.Fluorine removal is added
Agent volume V2=(V1×c1×N×1.2)/c2, wherein V1For high fluorine wastewater volume, c2For calcium ion concentration in defluorinating agent, N is
Small-scale experiment proportionality coefficient, 1.2 be excess coefficient.Defluorinating agent is that fluorine carbon cerium mischmetal mining and metallurgy is refined chlorination system in separation process and contained
There is the waste water of high concentration calcium salt, the addition speed control of defluorinating agent is in 12m3/h。
Step 4：Be added hydrochloric acid adjust precipitation after waste water to its pH be 8.
Step 5：Cationic-type polyacrylamide solution is added into high fluorine waste water the calcirm-fluoride fine grained of formation flocculates
At bulky grain.The mass concentration of cationic-type polyacrylamide anions in solution type polyacrylamide is 2.5 ‰, high fluorine waste water
It is 50 with the ratio between the volume of cationic-type polyacrylamide solution:1.
Step 6：When the flocculation of calcirm-fluoride fine grained is at macroscopic alumen ustum, stop aeration immediately, completely after precipitation, mistake
Filter, discharged wastewater met the national standard.
Embodiment 3
The present embodiment provides the method for FLUORIDE REMOVAL IN WASTEWATER in a kind of refining separation of fluorine carbon cerium mischmetal mining and metallurgy, this method uses fluorine carbon cerium
Rare Earth Mine smelts the waste water for containing high concentration calcium salt of chlorination system in separation as defluorinating agent, realizes the repetition profit of waste water
With zero cost；Defluorination effect is good, saves two level, three-level depth fluorine removal process, saves the time；Calcirm-fluoride yield is high, additional profit
It is high.As shown in Figure 1, this method is as follows：
Step 1：The high fluorine waste water after alkali turns is collected, its volume is denoted as V1, it is aerated through wind turbine uniform.
Step 2：Hydrochloric acid is added into high fluorine waste water and adjusts its pH to 11.
Step 3：The concentration for detecting high fluorine fluorine in wastewater, is denoted as c1, defluorinating agent is then added to precipitate fluorine.Fluorine removal is added
Agent volume V2=(V1×c1×N×1.3)/c2, wherein V1For high fluorine wastewater volume, c2For calcium ion concentration in defluorinating agent, N is
Small-scale experiment proportionality coefficient, 1.3 be excess coefficient.Defluorinating agent is that fluorine carbon cerium mischmetal mining and metallurgy is refined chlorination system in separation process and contained
There is the waste water of high concentration calcium salt, the addition speed control of defluorinating agent is in 15m3/h。
Step 4：Be added hydrochloric acid adjust precipitation after waste water to its pH be 9.
Step 5：Cationic-type polyacrylamide solution is added into high fluorine waste water the calcirm-fluoride fine grained of formation flocculates
At bulky grain.The mass concentration of cationic-type polyacrylamide anions in solution type polyacrylamide be 2 ‰, high fluorine waste water with
The ratio between volume of cationic-type polyacrylamide solution is 55:1.
Step 6：When the flocculation of calcirm-fluoride fine grained is at macroscopic alumen ustum, stop aeration immediately, completely after precipitation, mistake
Filter, discharged wastewater met the national standard.
Embodiment 4
The present embodiment is carried out using the method for FLUORIDE REMOVAL IN WASTEWATER in the fluorine carbon cerium mischmetal mining and metallurgy refining separation provided in embodiment 2
Small-scale experiment twice, be respectively labeled as lab scale 1. with lab scale 2., lab scale is 1. with lab scale test method 2. and result respectively such as table 1
Shown in table 2.
1 lab scale of table 1. test method and result
| Waste water title | Wastewater flow rate (mL) | Waste water temperature (DEG C) | pH | F-(mg/L) | Ca2+(g/L) |
| Alkali turns waste water | 300 | 38.5 | 12 | 5920 | / |
| Defluorinating agent | 70 | 21.2 | 4.5 | / | 97.5 |
| Waste water after reaction | / | / | 8 | 5.62 | 3.92 |
2 lab scale of table 2. test method and result
| Waste water title | Wastewater flow rate (mL) | Waste water temperature (DEG C) | pH | F-(mg/L) | Ca2+(g/L) |
| Alkali turns waste water | 300 | 38.5 | 12 | 5920 | / |
| Defluorinating agent | 60 | 21.2 | 4.5 | / | 97.5 |
| Waste water after reaction | / | / | 8 | 11.43 | 0.54 |
It can be obtained by the data of Tables 1 and 2：1. lab scale is the excessive fluorine removal reaction of defluorinating agent, defluorination effect is good, instead
Fluorinated volume is less than national standard reference 8mg/L in waste water after answering.The amount of lab scale 2. defluorinating agent is lucky, basically reaches fluorine removal effect
Fruit.So 2. calculating Ca by lab scale2+With F-Quality consumption than be 3.28:1, i.e., often processing 1g F-3.28g need to be consumed
Ca2+, i.e. small-scale experiment coefficient N is 3.28.
Embodiment 5
The present embodiment is according to the small-scale experiment in embodiment 4 as a result, fluorine removal to the high fluorine waste water in actual production process
Have a try greatly and tests.
In actual production process, the waste water containing high concentration calcium salt from chlorination system that our factory generates daily is (following
Abbreviation defluorinating agent) amount about 75m3, it is about 300m that high fluorine alkali, which turns waste water,3, after testing, Ca2+Mean concentration is 97.5g/L, F-It is average
A concentration of 6g/L, it is 60.6m to calculate required fluorine removal dosage3, to ensure that one-step method fluorine removal is primary qualified and makes full use of existing
Defluorinating agent, using lab scale 1. in defluorinating agent add ratio, be added excess defluorinating agent, that is, 60.6m3* 120%=72.72m3.According to
This is theoretical, has carried out two big have a try and has tested, be respectively labeled as trying greatly 1. and big examination 2., 1. and big examination test method 2. big examination
And result difference is as shown in Table 3 and Table 4.
Table 3 tries greatly 1. test method and result
| Waste water title | Wastewater flow rate (m3) | Waste water temperature (DEG C) | pH | F-(mg/L) | Ca2+(g/L) |
| Alkali turns waste water | 164.5 | 35 | 13.5 | 5814 | / |
| Defluorinating agent | 38.25 | 21 | 4.5 | / | 97.5 |
| Waste water after reaction | / | / | 8 | 3.96 | 4.1 |
Table 4 tries greatly 2. test method and result
| Waste water title | Wastewater flow rate (m3) | Waste water temperature (DEG C) | pH | F-(mg/L) | Ca2+(g/L) |
| Alkali turns waste water | 105.75 | 35.5 | 13.5 | 5930 | / |
| Defluorinating agent | 25.3 | 20 | 4.5 | / | 97.5 |
| Waste water after reaction | / | / | 8 | 5.83 | 3.04 |
It can be obtained by the data of table 3 and table 4：1., 2. big examination is that excessive extraction wastewater is reacted, can reach defluorination effect,
And after reacting 1. waste water impurity index is coincide substantially with lab scale, thus demonstrates fluorine carbon cerium mischmetal mining and metallurgy refining point provided by the invention
The science and practicability of method from middle FLUORIDE REMOVAL IN WASTEWATER.
In addition, in being detached using the fluorine carbon cerium mischmetal mining and metallurgy refining of the present invention before the method for FLUORIDE REMOVAL IN WASTEWATER, it is annual for giving up
The reagent cost of water fluoridation is：2000 tons * 830 yuan=1,660,000 yuan of calcium chloride, depth fluorine removal medicament 10 tons * 28000 yuan=280,000
Member utilizes the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy provided by the invention refining separation, it is contemplated that cost-effective 1,940,000 yuan of year
Left and right has considerable prospect of the application.
The invention is not limited in specific implementation modes above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (8)
1. the method for FLUORIDE REMOVAL IN WASTEWATER in the refining separation of fluorine carbon cerium mischmetal mining and metallurgy, which is characterized in that it includes the following steps：
（1）It collects alkali and turns high fluorine waste water, be aerated through wind turbine uniform；
（2）Salt acid for adjusting pH is added into high fluorine waste water to 9-11；
（3）Defluorinating agent being put into high fluorine waste water, precipitation reaction being carried out to fluorine, defluorinating agent is that the refining of fluorine carbon cerium mischmetal mining and metallurgy detached
The waste water containing high concentration calcium salt of chlorination system in journey；
（4）Hydrochloric acid is added and adjusts the wastewater pH after reaction to 6-9；
（5）Flocculant is added to flocculate to form alumen ustum, discharged wastewater met the national standard after filtering.
2. the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy refining separation according to claim 1, which is characterized in that step
（2）In, salt acid for adjusting pH is added into high fluorine waste water to 10.
3. the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy refining separation according to claim 1, which is characterized in that step
（3）In, before defluorinating agent is added into high fluorine waste water, the fluorinated volume in high fluorine waste water is detected, testing result is denoted as c1, remove
The addition volume V of fluorine agent2It calculates according to the following formula：V2=（V1×c1×N×(1.1-1.3)）/c2, wherein V1For high fluorine waste water body
Product, c2For calcium ion concentration in defluorinating agent, N is small-scale experiment proportionality coefficient,（1.1-1.3）For excess coefficient.
4. the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy refining separation according to claim 3, which is characterized in that step
（3）In, the addition speed of defluorinating agent is 5-15m3/h。
5. the method for FLUORIDE REMOVAL IN WASTEWATER, special in the fluorine carbon cerium mischmetal mining and metallurgy refining separation according to any one of claim 1-4
Sign is, step（5）In, the flocculant is polyacrylamide.
6. the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy refining separation according to claim 5, which is characterized in that described
Polyacrylamide is cationic, and is the solution that mass concentration is 2-3 ‰.
7. the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy refining separation according to claim 6, which is characterized in that high fluorine
The ratio between waste water and the volume of cationic polyacrylamide solution are 45-55:1.
8. the method for FLUORIDE REMOVAL IN WASTEWATER in fluorine carbon cerium mischmetal mining and metallurgy refining separation according to claim 7, which is characterized in that formed
After alumen ustum, stop aeration immediately.
Priority Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109574313A (en) * | 2018-12-26 | 2019-04-05 | 四川省乐山锐丰冶金有限公司 | A kind of RE waste water resource comprehensive utilization production crystal form CaF2Method |
| CN111876599A (en) * | 2020-07-24 | 2020-11-03 | 乐山盛和稀土股份有限公司 | Rare earth feed liquid value adjusting process |
| CN114045405A (en) * | 2021-10-25 | 2022-02-15 | 四川江铜稀土有限责任公司 | Method for fixing fluorine in alkali-transferring slag during smelting separation of fluorine-carbon cerium rare earth ore |
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| CN202038939U (en) * | 2011-05-19 | 2011-11-16 | 山东昭和新材料科技股份有限公司 | Fluorine-contained wastewater treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202038939U (en) * | 2011-05-19 | 2011-11-16 | 山东昭和新材料科技股份有限公司 | Fluorine-contained wastewater treatment system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109574313A (en) * | 2018-12-26 | 2019-04-05 | 四川省乐山锐丰冶金有限公司 | A kind of RE waste water resource comprehensive utilization production crystal form CaF2Method |
| CN109574313B (en) * | 2018-12-26 | 2021-12-17 | 四川省乐山锐丰冶金有限公司 | Comprehensive recovery production crystal form CaF of rare earth wastewater resources2Method (2) |
| CN111876599A (en) * | 2020-07-24 | 2020-11-03 | 乐山盛和稀土股份有限公司 | Rare earth feed liquid value adjusting process |
| CN114045405A (en) * | 2021-10-25 | 2022-02-15 | 四川江铜稀土有限责任公司 | Method for fixing fluorine in alkali-transferring slag during smelting separation of fluorine-carbon cerium rare earth ore |
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Address after: 615600 Rare Earth Industrial Park, Fuxing Town, Mianning County, Liangshan Yi Autonomous Prefecture, Sichuan Province Patentee after: Zhongxi (Liangshan) Rare Earth Co.,Ltd. Address before: 615600 Rare Earth Industrial Park, Fuxing Town, Mianning County, Liangshan Yi Autonomous Prefecture, Sichuan Province Patentee before: SICHUAN JCC RARE EARTH METALS CO.,LTD. |
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