CN110205442A - A kind of preparation method of artificial Fluorite pellet - Google Patents
A kind of preparation method of artificial Fluorite pellet Download PDFInfo
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- CN110205442A CN110205442A CN201910455457.4A CN201910455457A CN110205442A CN 110205442 A CN110205442 A CN 110205442A CN 201910455457 A CN201910455457 A CN 201910455457A CN 110205442 A CN110205442 A CN 110205442A
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- fluorite
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- Metallurgy (AREA)
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- Compositions Of Oxide Ceramics (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a kind of preparation methods of artificial Fluorite pellet, include following steps: 1) is filtered: being collected fluoride waste and is first filtered, filtrate concentration controls Funing tablet in 1g/L or more；2) is precipitated: excessive calcium compound being added into concentrate, then dilute hydrochloric acid and aluminium chloride mixed liquor is added dropwise, precipitating is collected by filtration；3) is acidified: dilute hydrochloric acid is added dropwise into precipitating, precipitating is collected after filtering；4) mud: composite fibre powder, pure water are added into precipitating, stirs into mud paste；5) is suppressed: mud cream being suppressed, and it is air-cooled to carry out cold wind；6) is dried: first being carried out microwave drying and is being carried out heating, drying；7) is sintered: Fluorite pellet is carried out cryogenic high pressure sintering；8) cools down: to Fluorite pellet wind cooling temperature lowering, and polishing, polishes, obtains artificial Fluorite pellet；Artificial Fluorite pellet of the invention, is refined with fluoride waste, is reduced fluorine in wastewater content, is avoided contaminated wastewater, is reduced Natural Fluorite consumption, is reduced production cost.
Description
Technical field
The present invention relates to the preparation technical field of Fluorite pellet, and in particular to a kind of preparation method of artificial Fluorite pellet.
Background technique
Fluorite has the fusing point of infusibility substance during the metal smelts such as reduction special steel, stainless steel, ferroalloy, promotes furnace
Slag flowing, the characteristic for separating slag and metal very well in Melting of Special Steels, ferroalloy production, change iron process and non-ferrous metal metallurgy
It is used as fluxing agent in the process, is widely used in desulfurization, dephosphorization, enhances malleability and tensile strength of metal etc..Smelting fluorite
It is CaF that ore, which generally requires grade,2Content >=70wt% or more lump ore, but by resource constraint, in high-grade fluorite block
Mine day is becoming tight, and cost is unprecedented soaring, and there are many fluorite raw ore block, the powder of the oxides such as low-grade, high FeO, MnO, special
It is not that pile up like a mountain for the low-grade high impurity fluorite ore tailing that generates with nonferrous metals ore symbiosis through ore dressing, hopeless, waste
How resource and pollution environment, dispose these wastes, proposes that a kind of effective method of resource becomes what society extremely paid close attention to
Problem.
In order to effectively solve the problems, such as this, flotation is carried out to low-grade fluorite block, powder tailing first, grade is increased to CaF2
Content >=80wt%, agglomeration processing appropriate secondly is carried out to the high-grade fluorite powder after flotation, so that it can be used for
Metal smelt must find a kind of reasonable method of preparation Fluorite pellet so that Fluorite pellet obtained has compared with high-grade, more high-strength
It spends, to can be used for special steel, stainless steel, blast furnace, non-ferrous metal metallurgy then urgently to be resolved.
Summary of the invention
For the present invention precisely in order to overcoming above-mentioned deficiency, the technical problem to be solved is that provide a kind of heavy-duty car brake
Piece is added inorfil and gives full play to enhancing skeleton function, reduces brake block processing and the crackle in use, crack phenomenon；Add
Enter the powder of rubber and resin to improve brake block toughness, W-phenolic resin is added to improve the thermostabilization of entire brake process
Property.A small amount of antirust agent or zinc powder is added, controls getting rusty for they.
Purpose to realize the present invention, the technical solution adopted is that: a kind of preparation method of artificial Fluorite pellet, the preparation side
Method has specifically included following steps:
1) is filtered: being collected the waste water containing fluorine ion, is first filtered, filter insoluble matter, filtrate enters concentration tank progress
Concentration, controls the concentration of fluorine ion in 1g/L or more；
2) is precipitated: excessive calcium compound is added into the fluoride waste after concentration, it is 1- that concentration is added dropwise after being sufficiently stirred
2% dilute hydrochloric acid and the mixed liquor of aluminium chloride control the pH of fluoride waste between 6.5-7.5, are filtered after being sufficiently stirred, and receive
Collection precipitating, is precipitated 2-3 times with pure water；
3) be acidified: toward collect precipitating in be added concentration be 1-2% dilute hydrochloric acid, be sufficiently stirred, when precipitating quality not
When changing again, stop that dilute hydrochloric acid is added, precipitating is collected in filtering, is precipitated 2-3 times with pure water, is collected filtrate and is applied to step 2
In；
4) mud: composite fibre powder is added into the precipitating collected, pure water is added after mixing well, mud is sufficiently stirred into
Paste, water content 30-50%；
5) is suppressed: the mud cream prepared being transferred in spheric granules press and is suppressed, press temperature 20- is controlled
50 DEG C, the Fluorite pellet suppressed carries out air-cooled in 10-30 DEG C of cold wind；
6) is dried: air-dried Fluorite pellet arrangement being placed in microwave drying baking oven, the frequency of microwave drying baking oven is arranged
For 300MHz-3GHz, microwave drying 10-30min；
Fluorite pellet is placed in oven heat again, setting oven temperature is 30-60 DEG C, dries 2-5h, the firefly dried
Stone ball；
Every minor tick 1h starts oven heat extraction fan, and the damp-heat air in baking oven is drained, and re-starts heating drying；
7) is sintered: Fluorite pellet arrangement being placed in 100-300 DEG C of sintering furnace, controlling the pressure in sintering furnace is 2-
5MPa, cryogenic high pressure are sintered 3-5h；
8) cools down: carrying out wind cooling temperature lowering to Fluorite pellet, control rate of temperature fall is 3-5 DEG C/min, is cooled to firefly after room temperature
The polishing of stone ball, polishing, obtain artificial Fluorite pellet.
Preferably, the calcium compound is mixture, the carbon of calcium carbonate, calcium oxide, calcium hydroxide, calcium carbonate and calcium oxide
The mixture or calcium oxide of sour calcium and calcium hydroxide and the mixture of calcium hydroxide；Calcium carbonate, calcium oxide or calcium hydroxide etc. exist
It is reacted to obtain calcium fluoride precipitate in fluorine ion under acid condition.
Preferably, the ratio of dilute hydrochloric acid and aluminium chloride is 3-5 in the preparation method step 2 of the artificial Fluorite pellet:
1；Addition aluminium ion is hydrolyzed to obtain aluminium hydroxide adsorbent, and obtained calcirm-fluoride is carried out sedimentation absorption, liquid is accelerated to divide admittedly
From aluminium hydroxide is added in Fluorite pellet, improves the hardness of Fluorite pellet.
Preferably, composite fibre powder is fluorite powder, fluorite ore in the preparation method step 4 of the artificial Fluorite pellet
Powder, mineral composition fiber powder, glass fiber powder, ceramic fibre powder and silicate fiber powder mixture, add various minerals
Heat resistance, the wearability for further increasing Fluorite pellet, improve the texture of Fluorite pellet.
Preferably, fluorite powder in the composite fibre powder, fluorite miberal powder, mineral composition fiber powder, glass fiber powder,
The adding proportion of ceramic fibre powder and silicate fiber powder is 1-2:1-3:1:1:1:1.
Preferably, the calcium fluoride precipitate in composite fibre powder adding proportion be 3-8:1.
Preferably, the content of calcirm-fluoride is more than or equal to 70% in the Fluorite pellet.
Preferably, the grain particle diameter of the Fluorite pellet is 1-5cm.
The invention has the benefit that artificial Fluorite pellet prepared by the present invention is added more using calcirm-fluoride as main component
Kind meets mineral matter element, it is therefore intended that thermal stability, the abrasion resistance and hardness for improving artificial Fluorite pellet, in the sedimentation of calcirm-fluoride
In the process, addition aluminium ion improves the settling rate of calcirm-fluoride, and the aluminium ion added further supplements artificial Fluorite pellet
Heat resistance and stability reduce the unstable compound in artificial Fluorite pellet by the sediment of acidification most initial
Content avoids artificial Fluorite pellet from cracking；Calcirm-fluoride is refined using fluoride waste, the fluorine ion greatly reduced in waste water contains
Amount, avoids contaminated wastewater, also reduces the consumption of Natural Fluorite, reduce production cost.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The scope of protection of the invention.
Embodiment 1
A kind of preparation method of artificial Fluorite pellet, it is characterised in that: the preparation method has specifically included following steps:
1) is filtered: being collected the waste water containing fluorine ion, is first filtered, filter insoluble matter, filtrate enters concentration tank progress
Concentration, controls the concentration of fluorine ion in 1g/L or more；
2) is precipitated: excessive calcium compound is added into the fluoride waste after concentration, concentration is added dropwise after being sufficiently stirred is
2% dilute hydrochloric acid and the mixed liquor of aluminium chloride control the pH of fluoride waste between 6.5-7.5, are filtered after being sufficiently stirred, and receive
Collection precipitating, is precipitated 2-3 times with pure water；
3) be acidified: toward collect precipitating in be added concentration be 1% dilute hydrochloric acid, be sufficiently stirred, when precipitating quality no longer
When variation, stop that dilute hydrochloric acid is added, precipitating is collected in filtering, is precipitated 2-3 times with pure water, is collected filtrate and is applied to step 2
In；
4) mud: composite fibre powder is added into the precipitating collected, pure water is added after mixing well, mud is sufficiently stirred into
Paste, water content 40%；
5) is suppressed: the mud cream prepared being transferred in spheric granules press and is suppressed, press temperature 30 is controlled
DEG C, the Fluorite pellet suppressed carries out air-cooled in 15 DEG C of cold wind；
6) is dried: air-dried Fluorite pellet arrangement being placed in microwave drying baking oven, the frequency of microwave drying baking oven is arranged
For 1000MHz, microwave drying 15min；
Fluorite pellet is placed in oven heat again, setting oven temperature is 40 DEG C, dries 3h, the Fluorite pellet dried；
Every minor tick 1h starts oven heat extraction fan, and the damp-heat air in baking oven is drained, and re-starts heating drying；
7) is sintered: Fluorite pellet arrangement being placed in 200 DEG C of sintering furnace, controlling the pressure in sintering furnace is 3MPa, low
Warm high-pressure sinter 4h；
8) cools down: carrying out wind cooling temperature lowering to Fluorite pellet, control rate of temperature fall is 4 DEG C/min, is cooled to fluorite after room temperature
Ball polishing, polishing, obtain artificial Fluorite pellet.
Further, the calcium compound be calcium carbonate, calcium oxide, calcium hydroxide, calcium carbonate and calcium oxide mixture,
The mixture or calcium oxide of calcium carbonate and calcium hydroxide and the mixture of calcium hydroxide.
Further, the ratio of dilute hydrochloric acid and aluminium chloride is 4 in the preparation method step 2 of the artificial Fluorite pellet:
1。
Further, composite fibre powder is fluorite powder, fluorite ore in the preparation method step 4 of the artificial Fluorite pellet
Powder, mineral composition fiber powder, glass fiber powder, ceramic fibre powder and silicate fiber powder mixture.
Further, fluorite powder, fluorite miberal powder, mineral composition fiber powder, glass fibre in the composite fibre powder
The adding proportion of powder, ceramic fibre powder and silicate fiber powder is 2:1:1:1:1:1.
Further, the calcium fluoride precipitate in composite fibre powder adding proportion be 5:1.
Further, the content of calcirm-fluoride is more than or equal to 70% in the Fluorite pellet.
Further, the grain particle diameter of the Fluorite pellet is 2-4cm.
Embodiment 2
A kind of preparation method of artificial Fluorite pellet, it is characterised in that: the preparation method has specifically included following steps:
1) is filtered: being collected the waste water containing fluorine ion, is first filtered, filter insoluble matter, filtrate enters concentration tank progress
Concentration, controls the concentration of fluorine ion in 1g/L or more；
2) is precipitated: excessive calcium compound is added into the fluoride waste after concentration, concentration is added dropwise after being sufficiently stirred is
1% dilute hydrochloric acid and the mixed liquor of aluminium chloride control the pH of fluoride waste between 6.5-7.0, are filtered after being sufficiently stirred, and receive
Collection precipitating, is precipitated 2-3 times with pure water；
3) be acidified: toward collect precipitating in be added concentration be 1% dilute hydrochloric acid, be sufficiently stirred, when precipitating quality no longer
When variation, stop that dilute hydrochloric acid is added, precipitating is collected in filtering, is precipitated 2-3 times with pure water, is collected filtrate and is applied to step 2
In；
4) mud: composite fibre powder is added into the precipitating collected, pure water is added after mixing well, mud is sufficiently stirred into
Paste, water content 50%；
5) is suppressed: the mud cream prepared being transferred in spheric granules press and is suppressed, press temperature 20 is controlled
DEG C, the Fluorite pellet suppressed carries out air-cooled in 10 DEG C of cold wind；
6) is dried: air-dried Fluorite pellet arrangement being placed in microwave drying baking oven, the frequency of microwave drying baking oven is arranged
For 300MHz, microwave drying 30min；
Fluorite pellet is placed in oven heat again, setting oven temperature is 30 DEG C, dries 5h, the Fluorite pellet dried；
Every minor tick 1h starts oven heat extraction fan, and the damp-heat air in baking oven is drained, and re-starts heating drying；
7) is sintered: Fluorite pellet arrangement being placed in 100 DEG C of sintering furnace, controlling the pressure in sintering furnace is 5MPa, low
Warm high-pressure sinter 5h；
8) cools down: carrying out wind cooling temperature lowering to Fluorite pellet, control rate of temperature fall is 3 DEG C/min, is cooled to fluorite after room temperature
Ball polishing, polishing, obtain artificial Fluorite pellet.
Further, the calcium compound be calcium carbonate, calcium oxide, calcium hydroxide, calcium carbonate and calcium oxide mixture,
The mixture or calcium oxide of calcium carbonate and calcium hydroxide and the mixture of calcium hydroxide.
Further, the ratio of dilute hydrochloric acid and aluminium chloride is 3 in the preparation method step 2 of the artificial Fluorite pellet:
1。
Further, composite fibre powder is fluorite powder, fluorite ore in the preparation method step 4 of the artificial Fluorite pellet
Powder, mineral composition fiber powder, glass fiber powder, ceramic fibre powder and silicate fiber powder mixture.
Further, fluorite powder, fluorite miberal powder, mineral composition fiber powder, glass fibre in the composite fibre powder
The adding proportion of powder, ceramic fibre powder and silicate fiber powder is 1:1:1:1:1:1.
Further, the calcium fluoride precipitate in composite fibre powder adding proportion be 3:1.
Further, the content of calcirm-fluoride is more than or equal to 70% in the Fluorite pellet.
Further, the grain particle diameter of the Fluorite pellet is 1-3cm.
Embodiment 3
A kind of preparation method of artificial Fluorite pellet, it is characterised in that: the preparation method has specifically included following steps:
1) is filtered: being collected the waste water containing fluorine ion, is first filtered, filter insoluble matter, filtrate enters concentration tank progress
Concentration, controls the concentration of fluorine ion in 1g/L or more；
2) is precipitated: excessive calcium compound is added into the fluoride waste after concentration, concentration is added dropwise after being sufficiently stirred is
2% dilute hydrochloric acid and the mixed liquor of aluminium chloride control the pH of fluoride waste between 7.0-7.5, are filtered after being sufficiently stirred, and receive
Collection precipitating, is precipitated 2-3 times with pure water；
3) be acidified: toward collect precipitating in be added concentration be 2% dilute hydrochloric acid, be sufficiently stirred, when precipitating quality no longer
When variation, stop that dilute hydrochloric acid is added, precipitating is collected in filtering, is precipitated 2-3 times with pure water, is collected filtrate and is applied to step 2
In；
4) mud: composite fibre powder is added into the precipitating collected, pure water is added after mixing well, mud is sufficiently stirred into
Paste, water content 50%；
5) is suppressed: the mud cream prepared being transferred in spheric granules press and is suppressed, press temperature 50 is controlled
DEG C, the Fluorite pellet suppressed carries out air-cooled in 30 DEG C of cold wind；
6) is dried: air-dried Fluorite pellet arrangement being placed in microwave drying baking oven, the frequency of microwave drying baking oven is arranged
For 3GHz, microwave drying 10min；
Fluorite pellet is placed in oven heat again, setting oven temperature is 60 DEG C, dries 2h, the Fluorite pellet dried；
Every minor tick 1h starts oven heat extraction fan, and the damp-heat air in baking oven is drained, and re-starts heating drying；
7) is sintered: Fluorite pellet arrangement being placed in 300 DEG C of sintering furnace, controlling the pressure in sintering furnace is 2MPa, low
Warm high-pressure sinter 3h；
8) cools down: carrying out wind cooling temperature lowering to Fluorite pellet, control rate of temperature fall is 5 DEG C/min, is cooled to fluorite after room temperature
Ball polishing, polishing, obtain artificial Fluorite pellet.
Further, the calcium compound be calcium carbonate, calcium oxide, calcium hydroxide, calcium carbonate and calcium oxide mixture,
The mixture or calcium oxide of calcium carbonate and calcium hydroxide and the mixture of calcium hydroxide.
Further, the ratio of dilute hydrochloric acid and aluminium chloride is 5 in the preparation method step 2 of the artificial Fluorite pellet:
1。
Further, composite fibre powder is fluorite powder, fluorite ore in the preparation method step 4 of the artificial Fluorite pellet
Powder, mineral composition fiber powder, glass fiber powder, ceramic fibre powder and silicate fiber powder mixture.
Further, fluorite powder, fluorite miberal powder, mineral composition fiber powder, glass fibre in the composite fibre powder
The adding proportion of powder, ceramic fibre powder and silicate fiber powder is 2:3:1:1:1:1.
Further, the calcium fluoride precipitate in composite fibre powder adding proportion be 8:1.
Further, the content of calcirm-fluoride is more than or equal to 70% in the Fluorite pellet.
Further, the grain particle diameter of the Fluorite pellet is 2-5cm.
In the present invention, the artificial Fluorite pellet prepared by the present invention, using calcirm-fluoride as main component, addition is a variety of to meet mine
Material element, it is therefore intended that thermal stability, the abrasion resistance and hardness for improving artificial Fluorite pellet, in the infall process of calcirm-fluoride,
Add aluminium ion improve calcirm-fluoride settling rate, and add aluminium ion further supplement artificial Fluorite pellet heat resistance and
Stability is reduced the content of the unstable compound in artificial Fluorite pellet, is avoided by the sediment of acidification most initial
Artificial Fluorite pellet cracks；Calcirm-fluoride is refined using fluoride waste, the content of fluoride ion in waste water is greatly reduced, avoids
Contaminated wastewater also reduces the consumption of Natural Fluorite, reduces production cost.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of preparation method of artificial Fluorite pellet, it is characterised in that: the preparation method has specifically included following steps:
1) is filtered: being collected the waste water containing fluorine ion, is first filtered, filters insoluble matter, it is dense that filtrate enters concentration tank progress
Contracting, controls the concentration of fluorine ion in 1g/L or more；
2) is precipitated: excessive calcium compound is added into the fluoride waste after concentration, it is 1-2% that concentration is added dropwise after being sufficiently stirred
Dilute hydrochloric acid and aluminium chloride mixed liquor, control the pH of fluoride waste between 6.5-7.5, be filtered after being sufficiently stirred, collect
Precipitating is precipitated 2-3 times with pure water；
3) is acidified: the dilute hydrochloric acid that concentration is 1-2% being added into the precipitating collected, is sufficiently stirred, when the quality of precipitating no longer becomes
When change, stop that dilute hydrochloric acid is added, precipitating is collected in filtering, is precipitated 2-3 times with pure water, is collected filtrate and is applied in step 2；
4) mud: composite fibre powder being added into the precipitating collected, pure water is added after mixing well, mud paste is sufficiently stirred into,
Water content is 30-50%；
5) is suppressed: the mud cream prepared is transferred in spheric granules press and is suppressed, controls 20-50 DEG C of press temperature,
The Fluorite pellet that compacting obtains carries out air-cooled in 10-30 DEG C of cold wind；
6) is dried: air-dried Fluorite pellet arrangement being placed in microwave drying baking oven, the frequency of setting microwave drying baking oven is
300MHz-3GHz, microwave drying 10-30min；
Fluorite pellet is placed in oven heat again, setting oven temperature is 30-60 DEG C, dries 2-5h, the Fluorite pellet dried；
Every minor tick 1h starts oven heat extraction fan, and the damp-heat air in baking oven is drained, and re-starts heating drying；
7) is sintered: Fluorite pellet arrangement is placed in 100-300 DEG C of sintering furnace, controlling the pressure in sintering furnace is 2-5MPa,
Cryogenic high pressure is sintered 3-5h；
8) cools down: carrying out wind cooling temperature lowering to Fluorite pellet, control rate of temperature fall is 3-5 DEG C/min, is cooled to Fluorite pellet after room temperature
Polishing, polishing, obtain artificial Fluorite pellet.
2. a kind of preparation method of artificial Fluorite pellet according to claim 1, it is characterised in that: the calcium compound is carbon
Sour calcium, calcium oxide, calcium hydroxide, the mixture of calcium carbonate and calcium oxide, calcium carbonate and calcium hydroxide mixture or calcium oxide
With the mixture of calcium hydroxide.
3. a kind of preparation method of artificial Fluorite pellet according to claim 1, it is characterised in that: the artificial Fluorite pellet
The ratio of dilute hydrochloric acid and aluminium chloride is 3-5:1 in preparation method step 2.
4. a kind of preparation method of artificial Fluorite pellet according to claim 1, it is characterised in that: the artificial Fluorite pellet
Composite fibre powder is fluorite powder, fluorite miberal powder, mineral composition fiber powder, glass fiber powder, ceramics in preparation method step 4
The mixture of fiber powder and silicate fiber powder.
5. a kind of preparation method of artificial Fluorite pellet according to claim 4, it is characterised in that: in the composite fibre powder
The addition of fluorite powder, fluorite miberal powder, mineral composition fiber powder, glass fiber powder, ceramic fibre powder and silicate fiber powder
Ratio is 1-2:1-3:1:1:1:1.
6. a kind of preparation method of artificial Fluorite pellet according to claim 1, it is characterised in that: the calcium fluoride precipitate in
The adding proportion of composite fibre powder is 3-8:1.
7. a kind of preparation method of artificial Fluorite pellet according to claim 6, it is characterised in that: be fluorinated in the Fluorite pellet
The content of calcium is more than or equal to 70%.
8. a kind of preparation method of artificial Fluorite pellet described in -7 any one according to claim 1, it is characterised in that: the firefly
The grain particle diameter of stone ball is 1-5cm.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH054090A (en) * | 1991-06-27 | 1993-01-14 | Hitachi Plant Eng & Constr Co Ltd | Treatment of fluorine-containing organic waste water |
| CN101492192A (en) * | 2009-02-26 | 2009-07-29 | 杭州诚洁环保有限公司 | Coagulating agent for treating wastewater containing fluorine and use process thereof |
| CN102899486A (en) * | 2012-11-05 | 2013-01-30 | 内蒙古科技大学 | Method for leaching bastnaesite-containing rare-earth ore concentrates in complexing mode and preparing kryocide |
| CN103232053A (en) * | 2013-05-17 | 2013-08-07 | 北方民族大学 | Method for producing calcium fluoride by bottom sludge generated during treatment of industrial fluoride-containing wastewater |
| CN105905933A (en) * | 2016-06-23 | 2016-08-31 | 昆山阳澄蓝谷环境研究所有限公司 | Process for preparing high-purity artificial fluorite by recovering fluoride-containing wastewater |
| CN106986368A (en) * | 2017-03-13 | 2017-07-28 | 李德寿 | A kind of preparation method of artificial Fluorite pellet |
-
2019
- 2019-05-29 CN CN201910455457.4A patent/CN110205442B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH054090A (en) * | 1991-06-27 | 1993-01-14 | Hitachi Plant Eng & Constr Co Ltd | Treatment of fluorine-containing organic waste water |
| CN101492192A (en) * | 2009-02-26 | 2009-07-29 | 杭州诚洁环保有限公司 | Coagulating agent for treating wastewater containing fluorine and use process thereof |
| CN102899486A (en) * | 2012-11-05 | 2013-01-30 | 内蒙古科技大学 | Method for leaching bastnaesite-containing rare-earth ore concentrates in complexing mode and preparing kryocide |
| CN103232053A (en) * | 2013-05-17 | 2013-08-07 | 北方民族大学 | Method for producing calcium fluoride by bottom sludge generated during treatment of industrial fluoride-containing wastewater |
| CN105905933A (en) * | 2016-06-23 | 2016-08-31 | 昆山阳澄蓝谷环境研究所有限公司 | Process for preparing high-purity artificial fluorite by recovering fluoride-containing wastewater |
| CN106986368A (en) * | 2017-03-13 | 2017-07-28 | 李德寿 | A kind of preparation method of artificial Fluorite pellet |
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