KR101746836B1 - Ball mill standardization method - Google Patents

Ball mill standardization method Download PDF

Info

Publication number
KR101746836B1
KR101746836B1 KR1020150126924A KR20150126924A KR101746836B1 KR 101746836 B1 KR101746836 B1 KR 101746836B1 KR 1020150126924 A KR1020150126924 A KR 1020150126924A KR 20150126924 A KR20150126924 A KR 20150126924A KR 101746836 B1 KR101746836 B1 KR 101746836B1
Authority
KR
South Korea
Prior art keywords
ball
ball mill
moving distance
mill
quot
Prior art date
Application number
KR1020150126924A
Other languages
Korean (ko)
Other versions
KR20170029841A (en
Inventor
최희규
이재현
Original Assignee
창원대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 창원대학교 산학협력단 filed Critical 창원대학교 산학협력단
Priority to KR1020150126924A priority Critical patent/KR101746836B1/en
Publication of KR20170029841A publication Critical patent/KR20170029841A/en
Application granted granted Critical
Publication of KR101746836B1 publication Critical patent/KR101746836B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Abstract

The present invention relates to a ball mill standardization method, and more particularly, to a ball mill standardization method which uses a moving distance of a ball loaded in each ball mill to reduce the variation of the average grain size, ≪ / RTI >

Description

Ball mill standardization method [0002]

The present invention relates to a ball mill standardization method, and more particularly, to a ball mill standardization method which can obtain a pulverized product having a small variation in average particle size and a similar shape by using the moving distance of the ball loaded in each ball pulverizer .

Recently, in material engineering, especially powder engineering, characterization of the size and shape of each particle in the raw material adjustment and manufacturing process has become an important factor for the success of material development due to the demand for high quality and high function of the particulate material. Particularly, knowledge on the size and shape of particles is very important information in the microparticulate system including not only emulsions but also aerosols, suspensions and the like.

In this regard, Korean Patent No. 10-1081823 discloses a method of processing a phosphor by using an oil-based ball mill including a process of adding a solvent to a phosphor and planetary ball milling, Discloses a technique for processing a phosphor using a planetary ball mill that provides a fine phosphor powder having improved luminance and practically sufficient brightness.

In addition, Korean Patent Laid-Open No. 10-2014-0015942 proposes a method of modifying the shape of particles of copper powder using a pulverizing process of an ultra-high-speed oil-type medium pulverizer, whereby a massive copper powder is easily deformed into a plate- The present invention has been described in connection with a method for deforming a particle shape of a copper powder.

On the other hand, the method of manufacturing raw material particles plays a major role in the success of the development of new functional materials. However, in the production of raw material particles using various devices, there is little research on the standardization of each device capable of obtaining raw material particles having an average particle size and shape similar to each other and the analysis of the characteristics of raw material particles.

Korean Patent No. 10-1081823 (published on June 6, 2011). Korean Patent Laid-Open No. 10-2014-0015942 (published on 2014.02.07.)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a process for producing a raw material particle using various ball mills, And a method for standardizing a ball mill.

According to an aspect of the present invention, there is provided a ball mill including a plurality of ball mills, the method comprising: measuring a moving distance and an operating time of the ball loaded in each ball mill; And calculating a ratio of a running time value per moving distance of the balls of each ball mill.

According to a preferred embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (1).

[Equation 1]

Figure 112015087191949-pat00001

According to another preferred embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (2).

&Quot; (2) "

Figure 112015087191949-pat00002

According to another preferred embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (3).

&Quot; (3) "

Figure 112015087191949-pat00003

According to another preferred embodiment of the present invention, in the ball mill standardization method, the deviation of the average particle diameter of the pulverized product obtained through each pulverizer may be +/- 5% of the average particle diameter of the pulverized product.

According to another preferred embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (4).

&Quot; (4) "

Figure 112015087191949-pat00004

The ball mill standardization method according to the present invention has an effect of obtaining a pulverized product having a small variation in particle size that can be obtained at the time of producing raw material particles using various ball pulverizers and having similar shapes.

FIG. 1 is a process diagram showing each step of a ball mill standardization method according to the present invention.
2 is a motion prediction diagram of a ball loaded in an electric ball mill.
FIG. 3 is a movement prediction diagram of the ball loaded into the ball mill according to the rotation speed of the agitation ball mill.
4 is a cross-sectional view (a, b) of the planetary ball mill and a predictive diagram (c) of the movement motion of the ball loaded in the planetary ball mill.
5 is an SEM photograph of the pulverized product obtained according to the operation time of the pulverizer in Example 1 measured in Experimental Example 1. Fig.
6 is an SEM photograph of the pulverized product obtained according to the operation time of the pulverizer in Example 2 measured in Experimental Example 2. Fig.

Hereinafter, the present invention will be described in more detail.

As shown in FIG. 1, the method for standardizing a ball mill according to the present invention comprises: measuring a moving distance and an operating time of a ball loaded in each ball mill in a plurality of ball mills; And calculating a ratio of a running time value per moving distance of the balls of each ball mill.

The plurality of ball mills is not particularly limited as long as it is a mill using a ball usually used for milling the particles.

First, the moving distance and the running time of the ball loaded in the ball mill are measured.

The moving distance of the ball loaded in the ball mill refers to the moving distance of the ball loaded in the ball mill when the mill is rotated once.

The method of measuring the moving distance of the ball loaded in the ball mill may be different depending on the ball mill used, and the measuring method is not particularly limited.

In an embodiment of the present invention, as shown in FIG. 2, the ball inside the conventional ball mill moves along the inner circumference of the ball ball mill pot, . Therefore, the moving distance of the ball loaded in the electric ball mill can be calculated by the following equation (5).

&Quot; (5) "

Figure 112015087191949-pat00005

In another embodiment of the present invention, as shown in FIG. 3, the inner balls of the stirring ball mill can move along the circumference of the stirring vanes up and down and the stirring vanes according to the rotation of the stirring vanes. However, it is considered that the effect of crushing due to the up - and - down movement of the inner ball is insignificant.

Therefore, the moving distance of the ball loaded in the stirring ball mill can be calculated by the following equation (6).

&Quot; (6) "

Figure 112015087191949-pat00006

In another embodiment of the present invention, the inner ball of the planetary ball mill has a ball pot (R x pi) and a ball pot (A x [pi] (the inner diameter of the planet ball crusher ball port + the outer diameter of the planet ball crusher ball port + the minimum distance between the turntables).

Therefore, the moving distance of the balls loaded in the planetary ball mill can be calculated by the following equation (7).

&Quot; (7) "

Figure 112015087191949-pat00007

Next, the ratio of the running time value per moving distance of the balls of each ball mill is calculated.

The moving distance of each ball miller ball which can be calculated as described above means the moving distance of the ball loaded in the ball miller when the ball miller rotates once.

Therefore, the total moving distance of the ball loaded in the ball mill can be calculated by multiplying the moving distance of the ball loaded in the ball mill by the mill speed of the mill and the operating time of the mill.

The operating time ratio per moving distance of the balls charged into each ball mill is calculated by dividing the operating time of each mill when the balls charged in each ball mill move the same distance and use the same mill speed, Is not particularly limited as long as it can be calculated by the following formula.

In another embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (1).

[Equation 1]

Figure 112015087191949-pat00008

In another embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (2).

&Quot; (2) "

Figure 112015087191949-pat00009

In another embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (3).

&Quot; (3) "

Figure 112015087191949-pat00010

In another embodiment of the present invention, the ratio of the running time value per moving distance of the ball in each ball mill may satisfy the following equation (4).

&Quot; (4) "

Figure 112015087191949-pat00011

Further, the ball mill standardization method may be carried out by using various ball mills and various powder such as sphere type, plate type, flake type, wire type or bar type, It is possible to obtain a pulverized product having a small variation in the average particle diameter of the pulverized product obtained at a deviation of the average particle diameter of the pulverized product obtained through each pulverizer at the time of pulverization by 5% of the average particle diameter of the pulverized product.

Hereinafter, the present invention will be described in detail with reference to examples.

However, this embodiment is only an example for explaining the present invention in more detail, and the scope of the present invention is not limited to these embodiments.

≪ Example 1 >

(1) Calculation of travel distance of ball loaded in ball mill

A ball port of a conventional ball mill (HAJI Eng. Korea) was a zirconia pot having an inner diameter of 0.04 m. The ball port of the planetary ball mill (HAJI Eng. Korea) was a zirconia pot having an inner diameter of 0.04 m and an outer diameter of 0.108 m, and the distance between the ports was 0.028 m. Respectively.

First, as shown in FIG. 2, the balls loaded in the electric ball mill were judged to move along the inner circumference of the ball ball mill pot. Therefore, the moving distance of the ball loaded in the electric ball mill was calculated by the following equation (5) to obtain 0.04?.

&Quot; (5) "

Figure 112015087191949-pat00012

Next, as shown in FIG. 4, the ball inside the planetary ball mill is divided into a ball circumference (R 占 π) of the ball mill and a maximum distance (A × π; inner diameter of the planetary ball grinder ball port + outer diameter of the planet ball grinder ball port + minimum distance between the turntables). Therefore, the moving distance of the balls loaded in the planetary ball mill was calculated by the following equation (7) to obtain 0.18?.

&Quot; (7) "

Figure 112015087191949-pat00013

(2) Calculating the running time of the ball mill

Using the moving distance of the ball loaded in the ball mill calculated in Example 1-1, the total moving distance of the balls loaded in each mill was calculated using the following equation (8).

&Quot; (8) "

Figure 112015087191949-pat00014

When the moving distance of the balls charged in the ball mill is the same and the rotating speed of the ball mill is the same, the operating time of each ball mill is calculated as a ratio, and the following equation (4) is established.

&Quot; (4) "

Figure 112015087191949-pat00015

(3) Verification test of standardization method

Using the ratios of Equation (4) set up in Example 1-2, the running time of the ball mill for the pulverizer and the running time of the ball mill for pulverizing the ball were experimented as shown in the following Table 1 to obtain the ball ball mill and the ball mill . At this time, a plate-shaped copper powder having an aspect ratio of 5 or more (ALDRICH, purity: 99.0%, average particle diameter: 75 μm) was used as the raw material powder, The copper powder was used at a ratio by weight of 10: 1 by weight. More specifically, 40 g balls and 4 g of copper powder were used for the electric ball mill, and 440 g balls and 44 g of copper powder were used for the oil ball mill.

Total travel distance (m) of the ball loaded in the ball mill. Electric ball mill operating time (hours) Oil ball mill operating time (hours) 18,144 12 2.2 36,288 24 4.5 145,152 96 17.8 254,016 168 31.2

<Experimental Example 1> Particle analysis of pulverized material

In order to analyze the aspect ratio of the pulverized product obtained in Example 1, analysis was carried out by a known method for measuring the value obtained by dividing the long axis parallel to the length and the length of the pulverized particles by the short axis, Are shown in Table 2 below.

Electric ball crusher Oil ball crusher Operation time (hour) Aspect ratio Operation time (hour) Aspect ratio 12 1.33 2.2 1.22 24 1.40 4.5 1.17 96 1.04 17.8 1.08 168 1.08 31.2 1.02

As can be seen from the above Table 2, it can be confirmed that the aspect ratio of the pulverized material pulverized by the electric ball mill and the planetary ball pulverizer becomes closer to 1 as the running time of the ball mill becomes longer, It was confirmed that the shapes of the water particles became similar to each other.

In order to confirm the shape change of the pulverized particles while moving at the same moving distance, the particle shape of the pulverized product was photographed using a scanning electron microscope (SEM, JEOL JMS 5610, Japan) .

5 (a)) and the planetary ball mill (Fig. 5 (b)). As can be seen from Fig. 5, as the operating time of each pulverizer becomes longer, , It was confirmed that similar shapes were formed in each of the ground particles while moving at the same moving distance. It was confirmed that the average particle diameter of the ground particles obtained in the range of 95 to 105% of the average particle diameter was small.

&Lt; Example 2 >

(1) Calculation of travel distance of ball loaded in ball mill

A stirring ball mill (Stirred Ball Mill, HAJI Eng. Korea) was used with a stirring blade having a length of 0.07 m. As shown in FIG. 3, the inner balls of the stirrer ball mill were determined to move along the circumference of the up and down and stirring blades according to the rotation of the stirring blades. However, The effect was negligible and was not considered. Therefore, the moving distance of the ball loaded in the stirring ball mill was calculated by the following equation (6) to obtain 0.07?.

&Quot; (6) &quot;

Figure 112015087191949-pat00016

Next, the moving distance of the ball loaded in the planetary ball mill was calculated using Equation (7) in the same manner as in Example 1 to obtain 0.18?.

(2) Calculation of operation time of each ball mill

Using the moving distance of the ball loaded in the ball mill calculated in Example 2-1, the total moving distance of the ball loaded in the stirring ball mill and the planetary ball mill was calculated using the equation (8) And the operating time of each ball mill was calculated by the equation (4) in the same manner as in Example 1, as a ratio.

(3) Verification test of standardization method

Using the ratio of the running time set in Example 2-3, the stirring ball mill operating time and the running time of the planetary ball mill were tested as shown in the following Table 3 to obtain a stirred ball mill and an oil ball mill Respectively. The same copper powder as in Example 1 was used as the raw material powder, and the stirring ball mill was composed of 40 g balls and 4 g of copper powder. The ball mill was rotated at a speed of 500 rpm and a ball having a diameter of 3 mm. 440 g of balls and 44 g of copper powder were used as the oil ball mill.

A ball having a diameter of 3 mm was used, and only the planetary ball mill and the agitated ball mill were used as the mill and the mill hours were operated as described in Table 3 below.

The moving distance of the ball in the ball mill (m) Oil ball crusher
Operation time (minutes) Stirring ball mill
Operation time (minutes) 5,093 15 46 10,185 30 93 20,370 60 185 40,740 120 370

<Experimental Example 2> Particle analysis of pulverized material

The pulverized particles obtained in Example 2 were photographed using a scanning electron microscope, and the results of the photographing are shown in Fig.

As shown in Fig. 6, as the size of balls used for milling increases in the agitated ball mill (Fig. 5 (a)) and the oil mill (Fig. 5 (b)), And it was confirmed that the average particle size was in the range of 95 to 105%, which is similar to each other. As a result, it was confirmed that the shape and size of the pulverized particles became similar while moving the same distance.

As can be seen from the above Examples and Experimental Examples, the ball mill standardization method according to the present invention can be applied to various kinds of powder such as spherical, plate, flake, fiber or bar type, It is possible to obtain a pulverized product having a small variation in the average particle diameter and a shape similar to that of the pulverized product.

Claims (6)

In a plurality of ball mills including an electric ball mill, a stirring ball mill and a planetary ball mill,
Measuring the moving distance and the running time of the ball loaded in each ball mill; And
Calculating a ratio of a running time value per moving distance of the balls of each ball mill in the case where the balls charged in each ball mill move at the same distance and use the same grinding wheel rotational speed,
Wherein a ratio of a running time value per moving distance of the ball in each of the ball mills satisfies the following equation (4): &lt; EMI ID = 3.0 &gt;
&Quot; (4) &quot;
Figure 112017040055624-pat00027
. delete delete delete The ball mill standardization method according to claim 1, wherein the deviation of the average particle diameter of the pulverized product obtained through each pulverizer is ± 5% of the average particle diameter of the pulverized product. delete
KR1020150126924A 2015-09-08 2015-09-08 Ball mill standardization method KR101746836B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150126924A KR101746836B1 (en) 2015-09-08 2015-09-08 Ball mill standardization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150126924A KR101746836B1 (en) 2015-09-08 2015-09-08 Ball mill standardization method

Publications (2)

Publication Number Publication Date
KR20170029841A KR20170029841A (en) 2017-03-16
KR101746836B1 true KR101746836B1 (en) 2017-06-14

Family

ID=58497795

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150126924A KR101746836B1 (en) 2015-09-08 2015-09-08 Ball mill standardization method

Country Status (1)

Country Link
KR (1) KR101746836B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107597310B (en) * 2017-07-18 2019-04-26 浙江工业大学之江学院 A method of Ball Diameters of Tube Coal Mill is determined based on bed of material impact clamping of crushing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005272488A (en) 2004-03-22 2005-10-06 Fujikura Ltd METHOD FOR PRODUCING alpha-SIALON PHOSPHOR POWDER
KR101081823B1 (en) 2009-11-30 2011-11-09 서울대학교산학협력단 Processing method for fluorescent material using planetary ball mill and fluorescent material

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140015942A (en) 2012-07-27 2014-02-07 창원대학교 산학협력단 Method to change of the particle morphology of cupper powder by a planetary ball milling process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005272488A (en) 2004-03-22 2005-10-06 Fujikura Ltd METHOD FOR PRODUCING alpha-SIALON PHOSPHOR POWDER
KR101081823B1 (en) 2009-11-30 2011-11-09 서울대학교산학협력단 Processing method for fluorescent material using planetary ball mill and fluorescent material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
한국분말야금학회지 v.19 no.1, 2012년, pp.32-39*

Also Published As

Publication number Publication date
KR20170029841A (en) 2017-03-16

Similar Documents

Publication Publication Date Title
CN1292861C (en) Copper flake powder, method for producing copper flake powder, and conductive paste using copper flake powder
CN1177012C (en) Cerium based abrasive material and method for producing cerium based abrasive material
CN101948639B (en) Method for preparing high floating value floating aluminum silver paste
KR20080046195A (en) Process for producing flaky silver powder and flaky silver powder produced by the process
CN102482765A (en) Sputtering target of ferromagnetic material with low generation of particles
CN102557606A (en) Preparation method for magnesium-zinc soft ferrite material and magnesium-zinc soft ferrite material
CN103722175B (en) The manufacture method of superfine flaky zinc powder with high corrosion resistance
KR101746836B1 (en) Ball mill standardization method
JPH0788391A (en) Production of superfine powder
CN111212696A (en) Aluminum powder pigment and method for producing same
KR20170029843A (en) Method for manufacturing metal powder having particle shape modified by milling process
CN104692805A (en) Sintered ceramic, slide part therefrom, and process for producing sintered ceramic
JP4795484B2 (en) Iron ore raw material grinding method
CN101591163B (en) Preparation method of nano-loess slurry
KR101184730B1 (en) Method for Preparing Cerium Oxide Nano Powder Having Uniform Particle Distribution
US20180230315A1 (en) Aluminum pigment, method for producing aluminum pigment, coating composition comprising aluminum pigment, coating film, article having the coating film, ink composition, and printed product
US20120132736A1 (en) Silicon metal grinding machine
Kim et al. Wear resistance characteristics of micro-sized ceramic beads in a vertical bead mill
CN207431265U (en) A kind of VN alloy particulate abrasive machine
JP2015166123A (en) Method of manufacturing tungsten carbide-based cemented carbide tool excellent in thermal crack resistance
CN110975996B (en) Method for improving grinding efficiency of permanent magnetic ferrite pre-sintering material
JP3687898B2 (en) Method for producing cerium-based abrasive and cerium-based abrasive produced using the method
TWI710541B (en) Manufacturing method of sputtering target component and sputtering target component
KR20140076911A (en) Dielectric additives for MLCC and method for dispersion thereof
JP2010111570A (en) Y2o3 composite bead

Legal Events

Date Code Title Description
AMND Amendment
E601 Decision to refuse application
AMND Amendment
X701 Decision to grant (after re-examination)
GRNT Written decision to grant