CN107235502A - The method that calcirm-fluoride finished product is prepared using calcium fluoride containing sludge - Google Patents
The method that calcirm-fluoride finished product is prepared using calcium fluoride containing sludge Download PDFInfo
- Publication number
- CN107235502A CN107235502A CN201710678875.0A CN201710678875A CN107235502A CN 107235502 A CN107235502 A CN 107235502A CN 201710678875 A CN201710678875 A CN 201710678875A CN 107235502 A CN107235502 A CN 107235502A
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- China
- Prior art keywords
- fluoride
- calcium fluoride
- auxiliary agent
- calcirm
- containing sludge
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- 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
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/22—Fluorides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
Abstract
The present invention proposes a kind of method that utilization calcium fluoride containing sludge prepares calcirm-fluoride finished product, including：Mix calcium fluoride containing sludge and auxiliary agent A；The auxiliary agent A removes silica with the silicon dioxde reaction in the calcium fluoride containing sludge, is filtrated to get solution and sediment；The auxiliary agent A is for alkali lye or/and containing alkali waste water；The sediment and auxiliary agent B are mixed, the auxiliary agent B turns into calcirm-fluoride with the calcium hydroxide reaction in the sediment；Reacted with other hydroxide, become solution, removed；Calcium fluoride precipitate is obtained after cleaning, filtering produces calcirm-fluoride finished product.The operating procedure of the present invention is simple, and is that continuous circulation is carried out, and is easy to industrial application.In the obtained calcirm-fluoride finished product of the present invention, Calcium Fluoride Content is 95.0%~99.9%, belongs to high-grade artificial Fluorspar Powder, has a wide range of application.
Description
Technical field
The present invention relates to calcium fluoride sludge processing technology field, particularly relate to a kind of prepared using calcium fluoride containing sludge and be fluorinated
The method of calcium finished product.
Background technology
Calcirm-fluoride is the main original for preparing fluorochemical such as hydrofluoric acid, cryolith, aluminum fluoride on chemical industry
Material, in addition, fluorite fusing point is low, is widely used in the industry such as metallurgy, cement, glass, ceramics；Transparent colourless or colored firefly
Stone can also be used to prepare optical lens and handicraft.
Calcirm-fluoride (fluorite) belongs to non-renewable resources, and fluorite ore resource consumption is too fast, it is accordingly required in particular to protect.From 1999
Nian Qi, China is protected fluorite as strategic resource.The recycling for carrying out fluorine resource is the preferably square of protection fluorine resource
Method.
It was found from fluorine product is using process, the industry production such as electronics, glass corrosion, photovoltaic, LED illumination, plating, electrolytic aluminium
Fluoride waste can be all produced after the fluorine-containing product use that line is added, and eventually becomes calcium fluoride sludge.These industries are consumed every year
Various hydrofluoric acid and fluorine-containing product, the total amount for being converted into 100%HF is expected to be 33.5 ten thousand tons；When the absorptivity absorbed with water is
When 90%, the total fluoro quantity in waste water is up to 30.2 ten thousand tons.Calcium fluoride sludge (butt) 62 will be produced during wastewater treatment qualified discharge
Ten thousand tons；The moisture content of actual calcium fluoride sludge is about 103~1,240,000 tons for the annual production of 40~50%, i.e. calcium fluoride sludge.
At present, it is allowed to calcium fluoride sludge conventional treatment method have 4 kinds：Fill, burn common brick, mud of heating up water, resource comprehensive profit
With.
Landfill：Refer to qualified company, in specified place, after being solidified according to the program of regulation, make landfill stabilization.
Advantage is simple, conveniently.Have the disadvantage the higher wasting of resources, cost of disposal, land occupation, possible polluted underground water.
Burn common brick：Refer to qualified common brick factory, be mixed into using calcium fluoride sludge as raw material in clay, fired as common brick.
Advantage be it is simple, conveniently, utilization of resources.Have the disadvantage that consumption is few, can not consume comprehensively；And various regions are all in limitation common brick
Factory.
Heat up water mud：Refer to qualified cement plant, be mixed into using calcium fluoride sludge as raw material in cement raw material, instead of part
Calcium fluoride raw material, is fired as cement.Advantage be it is simple, conveniently, utilization of resources.Have the disadvantage that adaptability is narrow, be not each water
Mud factory can use, and consumption is few, can not consume comprehensively.
Current comprehensive utilization of resources includes：(need to dry, add high-quality Fluorspar Powder, granulation etc.) for steel and iron manufacturing.
Applied to concrete manufacture (but possible fluorine leaching content can be exceeded).CaF2 in flotation fluorine-containing sludge is mixed into high-quality Fluorspar Powder
(flotation difficulty is larger, cost is high, content is low, still have mud discharging).As the raw material of ceramic post sintering, (mixed volume is few, in sludge
Impurity content influence ceramic mass).In these modes, the fluorination manufactured except steel industry in part using calcium fluoride sludge
Outside calcisphere grain, the practical application of other manner is simultaneously few.
In CN106936386A, a kind of preparation method of artificial Fluorite pellet is disclosed, the calcirm-fluoride that it is obtained is because of content
It is low, be only limitted to smelting iron and steel and use, and to be mixed into greater number of technical grade Fluorspar Powder, the economic value of comprehensive utilization compared with
It is low.
In CN105905933A, fluoride waste with calcium hydroxide precipitation be calcium fluoride sludge (Calcium Fluoride Content 65%~
70%), while low concentration fluoride waste and calcium chloride reaction generation calcirm-fluoride and by crystalline silica nuclei in fluidized bed
Middle crystallization is calcium fluoride crystal (Calcium Fluoride Content 90%~95%), then calcium fluoride sludge, calcium fluoride crystal and binding agent are mixed
Granulating and forming after conjunction, as fluorite finished product.The technology is a kind of method of fluorine containing waste water processing, is can not be calcium fluoride sludge
In the case of purification, the form being mixed with using high level calcium fluoride crystal improves the effective content of calcium fluoride sludge；It is led
Want problem to crystallize out calcium fluoride crystal in low concentration fluoride waste, fluidized bed huge structure certainly will be caused, investment is very high；
Also, low production efficiency, the grade of final finished fluorite (calcirm-fluoride) is low.
Method operating cost height, the treatment effeciency of existing processing calcium fluoride sludge are low, the calcium fluoride sludge warp after processing
Ji is worth low, fluorine serious waste of resources.
The content of the invention
The present invention proposes a kind of method that utilization calcium fluoride containing sludge prepares calcirm-fluoride finished product, and solution is run in the prior art
Costly, treatment effeciency is low, economic value is low, fluorine serious waste of resources the problems such as.
The technical proposal of the invention is realized in this way：
A kind of method that utilization calcium fluoride containing sludge prepares calcirm-fluoride finished product, including：
Mix calcium fluoride containing sludge and auxiliary agent A；The auxiliary agent A is gone with the silicon dioxde reaction in the calcium fluoride containing sludge
Except silica, solution and sediment are filtrated to get；The auxiliary agent A is for alkali lye or/and containing alkali waste water；
The sediment and auxiliary agent B are mixed, the auxiliary agent B turns into fluorination with the calcium hydroxide reaction in the sediment
Calcium；Reacted with other hydroxide, become solution, removed；Calcium fluoride precipitate is obtained after cleaning, filtering produces fluorination
Calcium finished product；The auxiliary agent B is hydrofluoric acid or/and the waste water of hydrofluoric acid containing；
The calcirm-fluoride finished product, its Calcium Fluoride Content is 95.0%~99.9%.
As preferred technical scheme, the auxiliary agent A and the reaction temperature of the silica in the calcium fluoride containing sludge
For normal temperature~150 DEG C.
As preferred technical scheme, the auxiliary agent A obtains water with the silicon dioxde reaction in the calcium fluoride containing sludge
Glass.Waterglass finished product can be used as after separation.
As preferred technical scheme, the auxiliary agent A and the product of the aluminium hydroxide reaction in the calcium fluoride containing sludge
For sodium aluminate solution.
As preferred technical scheme, the reaction temperature of the auxiliary agent B and the hydroxide in the sediment is normal temperature
~95 DEG C.
As preferred technical scheme, the calcium fluoride containing sludge is after the neutralization reaction of fluoride waste calcium hydroxide is handled
Sediment；CaF2 contents are 50~80%wt in the calcium fluoride sludge, and SiO2 contents are 1~30%wt, CaO (including Ca
(OH) 2 and CaCO3) content be 2~35%wt, the contents of Al (OH) 3 be 0~20%wt, surplus be other hydroxide.
By auxiliary agent A and auxiliary agent B, most of impurity in calcium fluoride sludge is removed, high-grade calcirm-fluoride is being obtained
While finished product, waterglass and water purification agent byproduct are also obtained；Moreover, auxiliary agent A and auxiliary agent B can be the useless of other industries
Thing；It is truly realized twice laid, each doing his best.
Beneficial effect
(1) operating procedure of the invention is simple, and is that continuous circulation is carried out, and is easy to industrial application.
(2) in obtained calcirm-fluoride finished product of the invention, Calcium Fluoride Content is 95.00%~99.99%, belongs to high-grade
Artificial Fluorspar Powder, has a wide range of application.
(3) by calcium fluoride containing sludge being extracted as the realization of calcirm-fluoride finished product technology, calcirm-fluoride finished product is processed as fluorination
Hydrogen (hydrofluoric acid) and villiaumite are possibly realized.By taking electronics industry as an example：Due to using hydrofluoric acid, substantial amounts of calcirm-fluoride is generated dirty
Mud, landfill disposal cost is high, pollution environment, land occupation；, can be again using the technology and associated subsequent technology
The hydrofluoric acid needed for production is made in calcium fluoride sludge, the recycling economy circle of a complete fluorinated product is formed.
(4) a number of hydrofluoric acid containing waste water can be consumed in preparation process of the invention, makes fluoride wastewater treatment cost
Decline.
(5) it can consume a number of containing alkali waste water in preparation process of the invention, and be converted into waterglass finished product, become useless
For treasured.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
Only contain micro aluminium ion, barium ions, strontium ion and magnesium ion in calcium fluoride sludge in following embodiments；
In other embodiments, if containing more barium ions, strontium ion and magnesium ion etc.；Can also by with auxiliary agent A or auxiliary agent B
Reaction and remove.
High-grade fluorite is only obtained by adding alkali and the step of acid adding two in following embodiments, reactions steps are few, flow
It is short, save power consumption.Certain waste water can also be consumed simultaneously, reach turn waste into wealth, the purpose of Environment control, be suitable for extensive
Popularization and application.
Embodiment 1
The material used in the embodiment is：Calcium fluoride sludge 1667kg (moisture content 40%) after fluoride wastewater treatment；
Butt component：CaF2 contents are 65%wt, and SiO2 contents are 18%wt, and the contents of Ca (OH) 2 are 9%wt, other impurity 7%wt.
A kind of method that utilization calcium fluoride containing sludge prepares calcirm-fluoride finished product, comprises the following steps：
In 10M330% liquid caustic soda 800kg is added in stirred autoclave A；Stirring is opened, calcium fluoride sludge 1667kg is added；Directly
Connect into steam heating, reaction temperature is controlled at 75 DEG C, after reacting 2 hours, material is pumped into plate and frame filter press, filtered out
Solution is waterglass；Filter cake is pushed into stirred autoclave B, stirring adds 40% hydrofluoric acid 63kg after 20 minutes；Continue to react
10 minutes, whole materials are pumped into plate and frame filter press, the filtrate feeding Sewage Disposal filtered out, it is fluorination to obtain filter cake
Calcium product 1202kg, moisture content 38%, Calcium Fluoride Content 99.2%.
Embodiment 2
The material used in the embodiment is：Calcium fluoride sludge 1667kg (moisture content 40%) after fluoride wastewater treatment；
Butt component：CaF2 contents are 65%wt, and SiO2 contents are 18%wt, and the contents of Ca (OH) 2 are 9%wt, other impurity 7%wt.
A kind of method that utilization calcium fluoride containing sludge prepares calcirm-fluoride finished product, comprises the following steps：
In 10M330% liquid caustic soda 800kg is added in stirred autoclave A；Stirring is opened, calcium fluoride sludge 1667kg is added；Directly
Connect into boiling is steam heated to, after reacting 30 minutes, material is pumped into plate and frame filter press, the solution filtered out is water glass
Glass；Filter cake is pushed into stirred autoclave B, stirring adds the waste water 835kg of hydrofluoric acid containing concentration 3% after 20 minutes；Continue to react
20 minutes, whole materials are pumped into plate and frame filter press, the filtrate feeding Sewage Disposal filtered out, it is fluorination to obtain filter cake
Calcium product 1207kg, moisture content 38%, Calcium Fluoride Content 99.6%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (6)
1. the method for calcirm-fluoride finished product is prepared using calcium fluoride containing sludge, it is characterised in that including：
Mix calcium fluoride containing sludge and auxiliary agent A；The auxiliary agent A removes two with the silicon dioxde reaction in the calcium fluoride containing sludge
Silica, is filtrated to get solution and sediment；The auxiliary agent A is for alkali lye or/and containing alkali waste water；
The sediment and auxiliary agent B are mixed, the auxiliary agent B turns into calcirm-fluoride with the calcium hydroxide reaction in the sediment；With
Other hydroxide reactions, become solution, are removed；Obtain calcium fluoride precipitate after cleaning, filtering produce calcirm-fluoride into
Product；The auxiliary agent B is hydrofluoric acid or/and the waste water of hydrofluoric acid containing；
The calcirm-fluoride finished product, its Calcium Fluoride Content is 95.0%~99.9%.
2. the method that utilization calcium fluoride containing sludge according to claim 1 prepares calcirm-fluoride finished product, it is characterised in that described
The reaction temperature of silica in auxiliary agent A and the calcium fluoride containing sludge is normal temperature~150 DEG C.
3. the method that utilization calcium fluoride containing sludge according to claim 1 or 2 prepares calcirm-fluoride finished product, it is characterised in that
The auxiliary agent A obtains waterglass with the silicon dioxde reaction in the calcium fluoride containing sludge.
4. the method that utilization calcium fluoride containing sludge according to claim 1 or 2 prepares calcirm-fluoride finished product, it is characterised in that
The auxiliary agent A is sodium aluminate solution with the product that the aluminium hydroxide in the calcium fluoride containing sludge reacts.
5. the method that utilization calcium fluoride containing sludge according to claim 1 prepares calcirm-fluoride finished product, it is characterised in that described
The reaction temperature of hydroxide in auxiliary agent B and the sediment is normal temperature~95 DEG C.
6. the method that utilization calcium fluoride containing sludge according to claim 1 prepares calcirm-fluoride finished product, it is characterised in that described
Calcium fluoride containing sludge is the sediment after the neutralization reaction of fluoride waste calcium hydroxide is handled；CaF2 contains in the calcium fluoride sludge
Measure as 50~80%wt, SiO2 contents are 1~30%wt, CaO content is 2~35%wt, and the contents of Al (OH) 3 are 0~20%wt,
Surplus is other hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710678875.0A CN107235502B (en) | 2017-08-10 | 2017-08-10 | The method for preparing calcirm-fluoride finished product using calcium fluoride containing sludge |
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| CN201710678875.0A CN107235502B (en) | 2017-08-10 | 2017-08-10 | The method for preparing calcirm-fluoride finished product using calcium fluoride containing sludge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109775743A (en) * | 2019-03-22 | 2019-05-21 | 盛隆资源再生（无锡）有限公司 | A method of sterling calcirm-fluoride is extracted from calcium fluoride sludge |
| CN111994937A (en) * | 2020-08-31 | 2020-11-27 | 苏州中材非金属矿工业设计研究院有限公司 | Method for recovering calcium fluoride from fluorine-containing sludge |
| CN112897562A (en) * | 2021-01-05 | 2021-06-04 | 上海大学 | Method for purifying calcium fluoride from calcium fluoride sludge |
| CN113753934A (en) * | 2021-10-14 | 2021-12-07 | 湖北鑫熔生态科技新材料有限公司 | Method for preparing 97% purity fluorite powder |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109775743A (en) * | 2019-03-22 | 2019-05-21 | 盛隆资源再生（无锡）有限公司 | A method of sterling calcirm-fluoride is extracted from calcium fluoride sludge |
| CN109775743B (en) * | 2019-03-22 | 2021-11-30 | 盛隆资源再生（无锡）有限公司 | Method for extracting pure calcium fluoride from calcium fluoride sludge |
| CN111994937A (en) * | 2020-08-31 | 2020-11-27 | 苏州中材非金属矿工业设计研究院有限公司 | Method for recovering calcium fluoride from fluorine-containing sludge |
| CN111994937B (en) * | 2020-08-31 | 2023-11-03 | 苏州中材非金属矿工业设计研究院有限公司 | Method for recycling calcium fluoride from fluorine-containing sludge |
| CN112897562A (en) * | 2021-01-05 | 2021-06-04 | 上海大学 | Method for purifying calcium fluoride from calcium fluoride sludge |
| CN113753934A (en) * | 2021-10-14 | 2021-12-07 | 湖北鑫熔生态科技新材料有限公司 | Method for preparing 97% purity fluorite powder |
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Inventor after: Ying Shengrong Inventor after: Wen Tao Inventor after: Jiang Zhan Inventor after: Ying Yue Inventor before: Ying Shengrong Inventor before: Wen Tao Inventor before: Jiang Zhan |