CN107254259A - Novel rare-earth polishing powder and preparation method thereof - Google Patents
Novel rare-earth polishing powder and preparation method thereof Download PDFInfo
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- CN107254259A CN107254259A CN201710426259.6A CN201710426259A CN107254259A CN 107254259 A CN107254259 A CN 107254259A CN 201710426259 A CN201710426259 A CN 201710426259A CN 107254259 A CN107254259 A CN 107254259A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09G—POLISHING COMPOSITIONS; SKI WAXES
- C09G1/00—Polishing compositions
- C09G1/02—Polishing compositions containing abrasives or grinding agents
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Abstract
The present invention provides a kind of novel rare-earth polishing powder and preparation method thereof.A kind of preparation method of novel rare-earth polishing powder comprises the following steps：Step 1: raw material prepares；Step 2: sizing mixing, being fluorinated, being dehydrated；Step 3: drying；Step 4: wet ball grinding；Step 5: material by wet type mixing；Step 6: drying and high-temperature calcination；Step 7: airflow milling.Product after drying is carried out wet grinding glomeration by a kind of novel rare-earth polishing powder that the present invention is provided and preparation method thereof, then it is being coated on the product of conventional process flow, calcined again, product after so burning is essentially all sub- spherical, after airflow milling is crushed, the polishing powder produced does not have acute angle, and shape is all sub- spherical, scuffing will not be produced to glass, quality has arrived great lifting.
Description
Technical field
The invention belongs to polishing powder production technical field, more particularly to a kind of novel rare-earth polishing powder and preparation method thereof.
Background technology
The process of preparing for the polishing powder that tradition is used is simple, but has a great defect, and the product is used in low
Had no problem in the field at end, such as glass edging；But if used in high-end field, such as optical glass will produce a large amount of draw
Wound.This is mainly caused by raw material, is the defect of raw material in itself, and airflow milling allows irregular powder pair by gases at high pressure
Hit, the little particle powder so produced is variously-shaped to be had, most of particle has acute angle, acute angle is directly produced on glass and drawn
Wound, causes product unqualified.
The content of the invention
High-end field is cannot be used for solve existing polishing powder, powder has acute angle, and scuffing is easily produced on glass, is led
The underproof technical problem of product is caused, the present invention, which provides one kind, can be used for high-end field, powder does not have acute angle, it is not easy in glass
Scuffing is produced on glass, underproof novel rare-earth polishing powder of product and preparation method thereof is not caused.
The polishing powder for the novel rare-earth polishing powder that the present invention is provided is sub- spherical polishing powder.
In a kind of preferred embodiment of novel rare-earth polishing powder that the present invention is provided, the polishing powder particle size distribution is
D50=1.3 ± 0.2um.
The preparation method for the novel rare-earth polishing powder that the present invention is provided, comprises the following steps：
Step 1: raw material prepares：Prepare lanthanum cerium carbonated rare earth, prepare 1.5 ± 0.2um polishing powder using conventional method；
Step 2: sizing mixing, being fluorinated, being dehydrated：Lanthanum cerium carbonated rare earth addition water is sized mixing, hydrofluoric acid is added, progress is fluorinated anti-
Should, then be dehydrated, obtain fluorine carbonated rare earth；
Step 3: drying：Fluorine carbonated rare earth is dried at a temperature of 430 DEG C；
Step 4: wet ball grinding：The fluorine carbonated rare earth of drying is added into pure water and hydrofluoric acid, wet ball grinding is carried out, continued
Ball milling to powder center particle size distribution be D50=0.5 ± 0.2um；
Step 5: material by wet type mixing：The polishing powder for 1.5 ± 0.2um that pure water and conventional method prepare is added, batch mixing is carried out；
Step 6: drying and high-temperature calcination：First it is spray-dried high-temperature calcination again；
Step 7: airflow milling：The fluorine lanthanum carbonate cerium product of acquisition is subjected to air-flow crushing, powder center size distribution is obtained
Scope is D50=1.3 ± 0.2um rare earth powder.
In a kind of preferred embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided, in the step one,
The conventional method comprises the following steps：
Step one by one, raw material prepare：Prepare lanthanum cerium carbonated rare earth；
Step one two, size mixing, be fluorinated, being dehydrated：Lanthanum cerium carbonated rare earth addition water is sized mixing, hydrofluoric acid is added, is fluorinated
Reaction, then be dehydrated, obtain fluorine carbonated rare earth；
Step one three, calcining：Fluorine carbonated rare earth is calcined at 1020 DEG C；
Step one four, airflow milling：The fluorine rare earth oxide obtained after calcining is subjected to airflow milling, by product center granularity D50Control
System obtains required polishing powder in 1.5 ± 0.2um.
In a kind of preferred embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided, in the step 2,
The waste water that the dehydration is obtained is used for the use of sizing mixing.
In a kind of preferred embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided, in the step 3,
The dehydration is centrifugal dehydration.
In a kind of preferred embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided, in the step 4,
In wet ball grinding, the weight ratio of fluorine carbonated rare earth, pure water and hydrofluoric acid is 50:50:1.
In a kind of preferred embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided, have in the step 5
Body is：The good slurry of ball milling is transferred in agitator tank, under stirring, with slurry, pure water and 1.5 ± 0.2um polishing powders
Weight ratio be 10:7:5 ratio, adds pure water and 1.5 ± 0.2um polishing powder, is sufficiently stirred for a hour.
In a kind of preferred embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided, in the step 6,
In drying process with atomizing, gas inlet temperature is 360 degrees Celsius, and outlet temperature is 100 degrees Celsius.
In a kind of preferred embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided, in the step 6,
The high-temperature calcination temperature is 1070 DEG C, and the high-temperature calcination time is 5 hours.
Novel rare-earth polishing powder of the present invention and preparation method thereof has the advantages that：
Add during using polishing powder from rare earth cladding carbonated rare earth fluoride technology, polishing powder from rare earth secondary clacining technology, cladding
The technology dried after hydrogenation fluoric acid and cladding using spray drying technology, make product quality has arrived great lifting, can use
In high-end field, powder does not have acute angle, it is not easy to scuffing is produced on glass, does not cause product unqualified.Wet method is carried out to grind
Wear into spherical, be then coated on the product of conventional process flow, then calcined, the product after so burning is essentially all
Sub- spherical, after airflow milling is crushed, the polishing powder produced does not have acute angle, and shape is all that Asia is spherical, will not be to glass
Scuffing is produced, another benefit is, with the use of polishing powder, after surface coating layer is progressively worn away, the core of the inside
Acute angle is also ground off, and core is also worn into sub- spherical, can be continuing with, and calcine the hardness increase for the core for being, longevity twice
Life is lengthened.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing, wherein：
Fig. 1 is a kind of process chart of embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided；
The conventional method preparation 1.5 of the step of Fig. 2 is the preparation method of the novel rare-earth polishing powder shown in Fig. 1 one ±
A kind of 0.2um process chart of embodiment of polishing powder.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is all other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Polishing powder described in the novel rare-earth polishing powder 1 is sub- spherical polishing powder.The polishing powder particle size distribution is
D50=1.3 ± 0.2um.
Referring to Fig. 1, being a kind of technological process of embodiment of preparation method for the novel rare-earth polishing powder that the present invention is provided
Figure.
The preparation method S1 for the novel rare-earth polishing powder that the present invention is provided, comprises the following steps：
Step S11, raw material prepare：Prepare lanthanum cerium carbonated rare earth, prepare 1.5 ± 0.2um polishing powder using conventional method；
Step S12, size mixing, be fluorinated, being dehydrated：Lanthanum cerium carbonated rare earth addition water is sized mixing, hydrofluoric acid is added, progress is fluorinated anti-
Should, then be dehydrated, obtain fluorine carbonated rare earth；The waste water that the dehydration is obtained is used for the use of sizing mixing；
Step S13, drying：Fluorine carbonated rare earth is dried at a temperature of 430 DEG C；
Step S14, wet ball grinding：The fluorine carbonated rare earth of drying is added into pure water and hydrofluoric acid, wet ball grinding is carried out, continued
Ball milling to powder center particle size distribution be D50=0.5 ± 0.2um；In wet ball grinding, fluorine carbonated rare earth, pure water and hydrofluoric acid
Weight ratio be 50:50:1.
Step S15, material by wet type mixing：The polishing powder for 1.5 ± 0.2um that pure water and conventional method prepare is added, batch mixing is carried out；
Specially：The good slurry of ball milling is transferred in agitator tank, under stirring, with the weight of slurry, pure water and 1.5um polishing powders
Amount is than being 10:7:5 ratio, adds pure water and 1.5um polishing powder, is sufficiently stirred for a hour.
Step S16, drying and high-temperature calcination：First it is spray-dried high-temperature calcination again；In drying process with atomizing, inlet gas body temperature
Spend for 360 degrees Celsius, outlet temperature is 100 degrees Celsius；The high-temperature calcination temperature is 1070 DEG C, and the high-temperature calcination time is 5
Hour.
Step S17, airflow milling：The fluorine lanthanum carbonate cerium product of acquisition is subjected to air-flow crushing, powder center granularity point is obtained
Cloth scope is D50=1.3 ± 0.2um rare earth powder.
The conventional method preparation 1.5 of the step of Fig. 2 is the preparation method of the novel rare-earth polishing powder shown in Fig. 1 one ±
A kind of 0.2um process chart of embodiment of polishing powder.
The polishing powder S11 that the conventional method prepares 1.5 ± 0.2um comprises the following steps：
Step S111, raw material prepare：Prepare lanthanum cerium carbonated rare earth；
Step S112, size mixing, be fluorinated, being dehydrated：Lanthanum cerium carbonated rare earth addition water is sized mixing, hydrofluoric acid is added, is fluorinated
Reaction, then be dehydrated, obtain fluorine carbonated rare earth；
Step S113, calcining：Fluorine carbonated rare earth is calcined at 1020 DEG C；
Step S114, airflow milling：The fluorine rare earth oxide obtained after calcining is subjected to airflow milling, by product center granularity D50Control
System obtains required polishing powder in 1.5 ± 0.2um.
The novel rare-earth polishing powder of the present invention and preparation method thereof S1 has the advantages that：
Add during using polishing powder from rare earth cladding carbonated rare earth fluoride technology, polishing powder from rare earth secondary clacining technology, cladding
The technology dried after hydrogenation fluoric acid and cladding using spray drying technology, make product quality has arrived great lifting, can use
In high-end field, powder does not have acute angle, it is not easy to scuffing is produced on glass, does not cause product unqualified.Wet method is carried out to grind
Wear into spherical, be then coated on the product of conventional process flow, then calcined, the product after so burning is essentially all
Sub- spherical, after airflow milling is crushed, the polishing powder produced does not have acute angle, and shape is all that Asia is spherical, will not be to glass
Scuffing is produced, another benefit is, with the use of polishing powder, after surface coating layer is progressively worn away, the core of the inside
Acute angle is also ground off, and core is also worn into sub- spherical, can be continuing with, and calcine the hardness increase for the core for being, longevity twice
Life is lengthened.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of novel rare-earth polishing powder, it is characterised in that the polishing powder is sub- spherical polishing powder.
2. the preparation method of novel rare-earth polishing powder according to claim 1, it is characterised in that the polishing Powder Particle Size point
Cloth scope is D50=1.3 ± 0.2um.
3. the preparation method of the novel rare-earth polishing powder described in a kind of claim 1, it is characterised in that comprise the following steps：
Step 1: raw material prepares：Prepare lanthanum cerium carbonated rare earth, prepare 1.5 ± 0.2um polishing powder using conventional method；
Step 2: sizing mixing, being fluorinated, being dehydrated：Lanthanum cerium carbonated rare earth addition water is sized mixing, hydrofluoric acid is added, fluorination reaction is carried out, then
It is dehydrated, obtains fluorine carbonated rare earth；
Step 3: drying：Fluorine carbonated rare earth is dried at a temperature of 430 DEG C；
Step 4: wet ball grinding：The fluorine carbonated rare earth of drying is added into pure water and hydrofluoric acid, wet ball grinding is carried out, continues ball milling
It is D to powder center particle size distribution50=0.5 ± 0.2um；
Step 5: material by wet type mixing：The polishing powder for 1.5 ± 0.2um that pure water and conventional method prepare is added, batch mixing is carried out；
Step 6: drying and high-temperature calcination：First it is spray-dried high-temperature calcination again；
Step 7: airflow milling：The fluorine lanthanum carbonate cerium product of acquisition is subjected to air-flow crushing, powder center particle size distribution is obtained
For D50=1.3 ± 0.2um rare earth powder.
4. the preparation method of novel rare-earth polishing powder according to claim 3, it is characterised in that in the step one, institute
Conventional method is stated to comprise the following steps：
Step one by one, raw material prepare：Prepare lanthanum cerium carbonated rare earth；
Step one two, size mixing, be fluorinated, being dehydrated：Lanthanum cerium carbonated rare earth addition water is sized mixing, hydrofluoric acid is added, carries out fluorination reaction,
It is dehydrated again, obtains fluorine carbonated rare earth；
Step one three, calcining：Fluorine carbonated rare earth is calcined at 1020 DEG C；
Step one four, airflow milling：The fluorine rare earth oxide obtained after calcining is subjected to airflow milling, by product center granularity D50Control exists
1.5 ± 0.2um, obtains required polishing powder.
5. the preparation method of novel rare-earth polishing powder according to claim 3, it is characterised in that in the step 2, institute
Stating the waste water that dehydration obtains is used for the use of sizing mixing.
6. the preparation method of novel rare-earth polishing powder according to claim 3, it is characterised in that in the step 3, institute
It is centrifugal dehydration to state dehydration.
7. the preparation method of novel rare-earth polishing powder according to claim 3, it is characterised in that wet in the step 4
In method ball milling, the weight ratio of fluorine carbonated rare earth, pure water and hydrofluoric acid is 50:50:1.
8. the preparation method of novel rare-earth polishing powder according to claim 3, it is characterised in that specific in the step 5
For：The good slurry of ball milling is transferred in agitator tank, under stirring, with slurry, pure water and 1.5 ± 0.2um polishing powders
Weight ratio is 10:7:5 ratio, adds pure water and 1.5 ± 0.2um polishing powder, is sufficiently stirred for a hour.
9. the preparation method of novel rare-earth polishing powder according to claim 3, it is characterised in that in the step 6, spray
In mist drying process, gas inlet temperature is 360 degrees Celsius, and outlet temperature is 100 degrees Celsius.
10. the preparation method of novel rare-earth polishing powder according to claim 3, it is characterised in that in the step 6, institute
It is 1070 DEG C to state high-temperature calcination temperature, and the high-temperature calcination time is 5 hours.
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| CN109111856A (en) * | 2018-08-24 | 2019-01-01 | 甘肃稀土新材料股份有限公司 | A kind of lanthanum cerium yttrium element polishing powder and its preparation process |
| CN115678436A (en) * | 2022-11-04 | 2023-02-03 | 包头市科蒙新材料开发有限责任公司 | Preparation method of novel cerium-rich rare earth polishing powder |
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| CN115678436A (en) * | 2022-11-04 | 2023-02-03 | 包头市科蒙新材料开发有限责任公司 | Preparation method of novel cerium-rich rare earth polishing powder |
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Application publication date: 20171017 |