CN114522794A - Screening method for reducing content of crushed powder in plasma spheroidized powder - Google Patents
Screening method for reducing content of crushed powder in plasma spheroidized powder Download PDFInfo
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- CN114522794A CN114522794A CN202210317696.5A CN202210317696A CN114522794A CN 114522794 A CN114522794 A CN 114522794A CN 202210317696 A CN202210317696 A CN 202210317696A CN 114522794 A CN114522794 A CN 114522794A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B13/00—Control arrangements specially adapted for wet-separating apparatus or for dressing plant, using physical effects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/36—Devices therefor, other than using centrifugal force
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Abstract
The invention relates to the technical field of powder screening, and provides a screening method for reducing the content of broken powder in plasma spheroidized powder, which comprises the following steps: mixing plasma spheroidized powder to be screened, a dispersing agent and water to obtain a mixed solution; then, carrying out ultrasonic post-separation on the obtained mixed solution to obtain a precipitate; finally repeating the operation for n times on the obtained precipitate to obtain complete spherical plasma spheroidized powder; wherein n is more than or equal to 0. Because the specific surface area of the crushed powder is large, the crushed powder is easy to agglomerate in water, so that the weight of the crushed powder is increased, and the crushed powder is easy to settle to the bottom of a mixed solution; according to the invention, the dispersant is added into the mixed solution, so that the dispersibility of the crushed powder in the mixed solution is improved, the crushed powder floating in the mixed solution is prevented from agglomerating, and further the crushed powder is prevented from settling to the bottom of the mixed solution, and the content of the crushed powder in the plasma spheroidized powder is reduced.
Description
Technical Field
The invention relates to the technical field of powder screening, in particular to a screening method for reducing the content of broken powder in plasma spheroidized powder.
Background
Plasma spheroidization is a good way for preparing spherical powder with uniform components, high sphericity and good fluidity, and the technical principle is as follows: the powder is sent into the high-temperature plasma by using the high-temperature environment of the thermal plasma and the carrier gas, the powder particles are quickly heated and then surface (or whole) melted, and are condensed into spherical liquid drops under the action of surface tension, and the spherical liquid drops are condensed and solidified after entering a cooling chamber, so that the spherical powder is obtained. However, the plasma spheroidized powder obtained contains broken powder, which affects the service performance of the finally obtained powder.
In the prior art, a screening method of a screen is usually adopted to remove the crushed powder, but the non-spherical powder with the grain diameter slightly larger than the screen hole still remains in the complete spherical plasma spheroidized powder, so the effect of removing the crushed powder with the larger grain diameter is not ideal.
Therefore, it is desirable to provide a screening method for reducing the content of the crushed powder in the plasma spheroidized powder.
Disclosure of Invention
In view of this, the present invention provides a screening method for reducing the content of broken powder in plasma spheroidized powder, which can fully remove broken powder in plasma spheroidized powder, thereby obtaining complete spherical plasma spheroidized powder.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a screening method for reducing the content of broken powder in plasma spheroidized powder, which comprises the following steps:
(1) mixing plasma spheroidized powder to be screened, a dispersing agent and water to obtain a mixed solution;
(2) carrying out ultrasonic post-separation on the mixed solution obtained in the step (1) to obtain a precipitate;
(3) repeating the operation of the step (1) and the operation of the step (2) for n times on the precipitate obtained in the step (2) to obtain complete spherical plasma spheroidized powder; wherein n is more than or equal to 0.
Preferably, the dispersant in step (1) includes at least one of ammonium polymethacrylate, sodium tripolyphosphate, sodium hexametaphosphate, and sodium pyrophosphate.
Preferably, the dispersant is ammonium polymethacrylate.
Preferably, the volume ratio of the water to the plasma spheroidized powder in the step (1) is (3-10): 1.
preferably, the volume of the dispersing agent in the step (1) accounts for (1-3)% of the total volume of the plasma spheroidized powder and the water.
Preferably, the temperature of the ultrasound in the step (2) is 20-35 ℃.
Preferably, the frequency of the ultrasound in the step (2) is (35-50) KHZ.
Preferably, the time of the ultrasound in the step (2) is 5-20 min.
Preferably, the mixing solution is stirred while the ultrasound in the step (2) is performed.
Preferably, the time of the stirring and the time of the ultrasound are the same.
The invention provides a screening method for reducing the content of broken powder in plasma spheroidized powder, which comprises the following steps: mixing plasma spheroidized powder to be screened, a dispersing agent and water to obtain a mixed solution; then, carrying out ultrasonic post-separation on the obtained mixed solution to obtain a precipitate; finally repeating the operation for n times on the obtained precipitate to obtain complete spherical plasma spheroidized powder; wherein n is more than or equal to 0. Because the specific surface area of the crushed powder is large, the crushed powder is easy to agglomerate in water, so that the weight of the crushed powder is increased, and the crushed powder is easy to settle to the bottom of a mixed solution; according to the invention, the dispersing agent is added into the mixed solution, so that the dispersibility of the crushed powder in the mixed solution is improved, the crushed powder floating in the mixed solution is prevented from agglomerating, the crushed powder is prevented from settling to the bottom of the mixed solution, and the content of the crushed powder in the plasma spheroidized powder is reduced.
Detailed Description
The invention provides a screening method for reducing the content of broken powder in plasma spheroidized powder, which comprises the following steps:
(1) mixing plasma spheroidized powder to be screened, a dispersing agent and water to obtain a mixed solution;
(2) carrying out ultrasonic post-separation on the mixed solution obtained in the step (1) to obtain a precipitate;
(3) repeating the operation of the step (1) and the operation of the step (2) for n times on the precipitate obtained in the step (2) to obtain complete spherical plasma spheroidized powder; wherein n is more than or equal to 0.
The plasma spheroidized powder, the dispersing agent and water are mixed to obtain a mixed solution.
In the invention, the plasma spheroidized powder to be screened is preferably spheroidized powder collected after plasma spheroidization is finished. In the invention, the powder to be screened after plasma spheroidizing contains broken powder besides complete spherical powder, wherein the broken powder seriously influences the subsequent use of the plasma spheroidized powder and needs to be removed.
In the present invention, the dispersant preferably includes at least one of ammonium polymethacrylate, sodium tripolyphosphate, sodium hexametaphosphate, and sodium pyrophosphate, and more preferably ammonium polymethacrylate. According to the invention, the dispersing agent is added into the mixed solution, so that the dispersibility of the crushed powder in the mixed solution is improved, the crushed powder floating in the mixed solution is prevented from agglomerating, and further from settling to the bottom of the mixed solution, and the content of the crushed powder in the plasma spheroidizing powder is reduced, wherein the ammonium polymethacrylate does not contain phosphorus, and the pollution of the phosphorus in the produced wastewater to the environment is avoided.
In the invention, the volume ratio of the water to the plasma spheroidized powder is preferably (3-10): 1, more preferably (5-7): 1. in the invention, the volume of the dispersant is preferably (1-3)%, more preferably (1.5-2.5)%, of the total volume of the plasma spheroidized powder and water. According to the invention, the dosage of the water and the dispersant is controlled within the range, so that the crushed powder in the mixed solution can be fully dispersed, and the suspension of the crushed powder in the plasma spheroidized powder is realized, thereby reducing the content of the crushed powder in the plasma spheroidized powder.
After the mixed solution is obtained, the invention preferably performs ultrasonic treatment on the mixed solution to obtain a suspension, and then separates the suspension to obtain a precipitate.
In the invention, the temperature of the ultrasonic wave is preferably 20-35 ℃, and more preferably 25 ℃; the frequency of the ultrasonic wave is preferably (35-50) KHZ, and more preferably (30-40) KHZ; the time of the ultrasonic treatment is preferably 5-20 min, and more preferably 10-15 min. The invention limits the ultrasonic parameters in the range, and is beneficial to the full separation of the broken powder and the complete spherical powder in the plasma spheroidized powder.
In the present invention, the ultrasound is preferably performed while the mixed system is stirred. In the present invention, the stirring time is preferably the same as the ultrasonic time. The stirring operation is not particularly specified in the present invention, and the solution system is stirred by a stirring manner well known to those skilled in the art. The invention can accelerate the separation of broken powder and complete spherical powder in plasma spheroidized powder in the mixed solution by simultaneously matching and stirring the mixed solution through ultrasound.
The operation of the separation is not particularly specified in the invention, and the suspended substances in the suspension are removed by adopting a separation mode well known to a person skilled in the art, and then the water in the suspension is poured off to obtain a precipitate.
After the precipitate is obtained, the preparation of the mixed solution and the operation of the ultrasonic treatment in the scheme are repeated for n times, and then a crude product of the complete spherical plasma spheroidized powder is obtained, wherein n is more than or equal to 0, and preferably n is 3. In the present invention, after the preparation of the mixed solution and the operation of the ultrasonic treatment are completed once, if the obtained precipitate contains the crushed powder, the preparation of the mixed solution and the operation of the ultrasonic treatment are repeated until the precipitate contains no crushed powder.
After the crude product of the complete spherical plasma spheroidized powder is obtained, the invention preferably washes and dries the crude product to obtain the complete spherical plasma spheroidized powder.
The washing reagent is not specially specified in the invention, and the dispersing agent on the obtained complete spherical plasma spheroidized powder can be removed by adopting a reagent well known by the technical personnel in the field. In embodiments of the invention, the washing agent is preferably ethanol. The invention takes the organic solvent ethanol with relatively low price as the washing agent, which not only can remove the ammonium polymethacrylate on the complete spherical plasma spheroidized powder, but also can easily and completely dry the obtained complete spherical plasma spheroidized powder quickly because the boiling point of the ethanol is relatively low.
The drying method is not particularly limited in the present invention, and the solvent on the washed product can be removed by a drying method well known to those skilled in the art.
According to the invention, the dispersant is added into the mixed solution, so that the dispersibility of the crushed powder in the mixed solution is improved, the crushed powder floating in the mixed solution is prevented from agglomerating, and further the crushed powder is prevented from settling to the bottom of the mixed solution, and the content of the crushed powder in the plasma spheroidized powder is reduced.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
(1) Adding 500g of powder collected after the completion of the plasma spheroidization to be screened into a 1L beaker, adding deionized water 7 times the volume of the powder into the beaker, adding ammonium polymethacrylate into the beaker, and adding 2% of the volume of the ammonium polymethacrylate, which is the sum of the volume of the water and the volume of the plasma spheroidization powder, to obtain a mixed solution.
(2) And (2) putting the mixed solution obtained in the step (1) into an ultrasonic cleaning machine, setting the water temperature in the ultrasonic cleaning machine to be 25 ℃, the ultrasonic frequency to be 40KHZ, and carrying out ultrasonic treatment for 10min, wherein the mixed solution is stirred simultaneously to obtain a suspension.
(3) Scooping suspended matters in the suspension obtained in the step (2) by using water, and pouring water in the container to expose powder settled at the bottom of the container;
repeating the steps (1) to (3) for three times, and washing the powder which is deposited at the bottom of the container by using absolute ethyl alcohol to obtain a precipitate.
(4) And (4) sealing the precipitate obtained in the step (3) by using tinfoil, and drying in a constant-temperature oven at 80 ℃ for 24 hours to obtain complete spherical plasma spheroidized powder.
As can be seen from example 1, the dispersant ammonium polymethacrylate is added into the mixed solution, so that the dispersibility of the crushed powder is improved, the crushed powder is fully removed in the form of suspended matters, and finally the complete spherical plasma spheroidized powder is obtained.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A screening method for reducing the content of broken powder in plasma spheroidized powder comprises the following steps:
(1) mixing plasma spheroidized powder to be screened, a dispersing agent and water to obtain a mixed solution;
(2) carrying out ultrasonic post-separation on the mixed solution obtained in the step (1) to obtain a precipitate;
(3) repeating the operation of the step (1) and the operation of the step (2) for n times on the precipitate obtained in the step (2) to obtain complete spherical plasma spheroidized powder; wherein n is more than or equal to 0.
2. A screening method according to claim 1, wherein the dispersant in step (1) comprises at least one of ammonium polymethacrylate, sodium tripolyphosphate, sodium hexametaphosphate and sodium pyrophosphate.
3. A screening method according to claim 2, wherein said dispersing agent is ammonium polymethacrylate.
4. A screening method according to claim 1, wherein the volume ratio of the water to the plasma spheroidized powder in the step (1) is (3-10): 1.
5. a screening method according to claim 1, wherein the volume of the dispersant in the step (1) is (1-3)% of the total volume of the plasma spheroidized powder and the water.
6. A screening method according to claim 1, wherein the temperature of the ultrasound in step (2) is 20 to 35 ℃.
7. A screening method according to claim 1, wherein the frequency of the ultrasound in step (2) is (35-50) KHZ.
8. A screening method according to claim 1 or 6 or 7, wherein the time of the ultrasound in step (2) is 5-20 min.
9. A screening method according to claim 1, wherein the mixing solution is stirred while the ultrasound in step (2) is performed.
10. A method according to claim 9, wherein the time of agitation and the time of sonication are the same.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210317696.5A CN114522794A (en) | 2022-03-29 | 2022-03-29 | Screening method for reducing content of crushed powder in plasma spheroidized powder |
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| CN202210317696.5A CN114522794A (en) | 2022-03-29 | 2022-03-29 | Screening method for reducing content of crushed powder in plasma spheroidized powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231615A (en) * | 2022-06-22 | 2022-10-25 | 季华实验室 | Preparation method of nano-structure YSZ powder for additive manufacturing |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101838136A (en) * | 2010-05-14 | 2010-09-22 | 上海大豪纳米材料喷涂有限公司 | Preparation method of aluminium oxide and titanium dioxide compound ceramic powder |
| JP2011194344A (en) * | 2010-03-20 | 2011-10-06 | Fukumoto Giken:Kk | Method for separating and refining inorganic-type hollow fine-particle powder raw material, high-purity fine particle powder and separation refining apparatus |
| CN102489383A (en) * | 2011-12-02 | 2012-06-13 | 宝丰恒瑞新材料有限公司 | Dispersing agent used for silicon carbide micro powder water overflow grading and application method thereof |
| CN104087890A (en) * | 2014-07-18 | 2014-10-08 | 郑州高端装备与信息产业技术研究院有限公司 | Method for preparing ceramic coating lining of mud pump cylinder sleeve |
| CN204234313U (en) * | 2014-11-14 | 2015-04-01 | 北京科技大学 | A kind of disc type spherical powder screening plant |
| CN108993383A (en) * | 2018-07-16 | 2018-12-14 | 深圳市环球绿地新材料有限公司 | The preparation of spherical activated charcoal and screening technique |
| CN114555839A (en) * | 2019-10-18 | 2022-05-27 | 杰富意钢铁株式会社 | Method and apparatus for recovering manganese from waste dry battery |
-
2022
- 2022-03-29 CN CN202210317696.5A patent/CN114522794A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011194344A (en) * | 2010-03-20 | 2011-10-06 | Fukumoto Giken:Kk | Method for separating and refining inorganic-type hollow fine-particle powder raw material, high-purity fine particle powder and separation refining apparatus |
| CN101838136A (en) * | 2010-05-14 | 2010-09-22 | 上海大豪纳米材料喷涂有限公司 | Preparation method of aluminium oxide and titanium dioxide compound ceramic powder |
| CN102489383A (en) * | 2011-12-02 | 2012-06-13 | 宝丰恒瑞新材料有限公司 | Dispersing agent used for silicon carbide micro powder water overflow grading and application method thereof |
| CN104087890A (en) * | 2014-07-18 | 2014-10-08 | 郑州高端装备与信息产业技术研究院有限公司 | Method for preparing ceramic coating lining of mud pump cylinder sleeve |
| CN204234313U (en) * | 2014-11-14 | 2015-04-01 | 北京科技大学 | A kind of disc type spherical powder screening plant |
| CN108993383A (en) * | 2018-07-16 | 2018-12-14 | 深圳市环球绿地新材料有限公司 | The preparation of spherical activated charcoal and screening technique |
| CN114555839A (en) * | 2019-10-18 | 2022-05-27 | 杰富意钢铁株式会社 | Method and apparatus for recovering manganese from waste dry battery |
Non-Patent Citations (3)
| Title |
|---|
| 李合琴等: "《金属材料工程实验教程》", 31 July 2018, 合肥工业大学出版社 * |
| 杨俊杰: "制药工程原理与设备", 重庆大学出版社 * |
| 郑水林等: "《超细粉碎工程》", 30 September 2006, 中国建材工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231615A (en) * | 2022-06-22 | 2022-10-25 | 季华实验室 | Preparation method of nano-structure YSZ powder for additive manufacturing |
| CN115231615B (en) * | 2022-06-22 | 2024-05-07 | 季华实验室 | Preparation method of nano-structure YSZ powder for additive manufacturing |
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