JPH03178352A - Wet gravitational classification method - Google Patents
Wet gravitational classification methodInfo
- Publication number
- JPH03178352A JPH03178352A JP31630789A JP31630789A JPH03178352A JP H03178352 A JPH03178352 A JP H03178352A JP 31630789 A JP31630789 A JP 31630789A JP 31630789 A JP31630789 A JP 31630789A JP H03178352 A JPH03178352 A JP H03178352A
- Authority
- JP
- Japan
- Prior art keywords
- particles
- heavy liquid
- liquid
- classified
- light liquid
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 19
- 239000007788 liquid Substances 0.000 claims abstract description 82
- 239000002245 particle Substances 0.000 claims abstract description 64
- 230000005484 gravity Effects 0.000 claims abstract description 24
- 230000001376 precipitating effect Effects 0.000 claims 1
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000725 suspension Substances 0.000 abstract description 8
- 238000010908 decantation Methods 0.000 abstract description 7
- 239000010419 fine particle Substances 0.000 description 14
- 238000004062 sedimentation Methods 0.000 description 12
- 239000011362 coarse particle Substances 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 229920006328 Styrofoam Polymers 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000008261 styrofoam Substances 0.000 description 2
- LUEWUZLMQUOBSB-FSKGGBMCSA-N (2s,3s,4s,5s,6r)-2-[(2r,3s,4r,5r,6s)-6-[(2r,3s,4r,5s,6s)-4,5-dihydroxy-2-(hydroxymethyl)-6-[(2r,4r,5s,6r)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol Chemical compound O[C@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@@H](O[C@@H]2[C@H](O[C@@H](OC3[C@H](O[C@@H](O)[C@@H](O)[C@H]3O)CO)[C@@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O LUEWUZLMQUOBSB-FSKGGBMCSA-N 0.000 description 1
- 229920002581 Glucomannan Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940046240 glucomannan Drugs 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は湿式重力分級方法に係り、特に粉体を重力沈降
分級法により少ないデカンテーション回数にて効率的に
微粒子と粗粒子とに分級することができる湿式重力分級
方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wet gravity classification method, and particularly to a method for efficiently classifying powder into fine particles and coarse particles using a gravity sedimentation classification method with a small number of decantations. The present invention relates to a wet gravity classification method that can be used.
［従来の技術］
第２図は重力沈降分級法に用いられる重力沈降分級槽の
模式的な説明図である。この方法は、粉体を重力沈降分
級槽１内の分散媒２中に稀薄な分散濃度で入れて攪拌し
た後、静かに沈降させ、定時間後に、比較的沈降時間の
遅い微粒子３を含む上澄み層を抜き出す（以下、この操
作を「デカンテーションｊという。）ことにより、比較
的沈降速度の速い粗粒子４と比較的沈降速度の遅い微粒
子３とを分級する方法である。このデカンテーション操
作回数を多くすることにより分級精度を高めることがで
きる。[Prior Art] FIG. 2 is a schematic illustration of a gravity sedimentation classification tank used in the gravity sedimentation classification method. In this method, powder is placed in a dispersion medium 2 in a gravity sedimentation classification tank 1 at a dilute dispersion concentration, stirred, and then allowed to settle gently. After a certain period of time, a supernatant containing fine particles 3 having a relatively slow settling time By extracting the layer (hereinafter, this operation is referred to as "decantation j"), it is a method of classifying coarse particles 4 with a relatively fast sedimentation rate and fine particles 3 with a relatively slow sedimentation rate.The number of times of this decantation operation The classification accuracy can be improved by increasing the number of .
［発明が解決しようとする課題］
従来の方法では、沈降槽内で攪拌した際、すでに微粒子
は槽内に分散された状態となっており、静置しても粗粒
子は沈殿するものの微粒子が浮上することはない。むし
ろ、粗粒子と共に微粒子も下層へ移動するようになるた
め、沈降する粗粒子群の中に微粒子がまぎれ込み、分級
精度が低下する。[Problems to be Solved by the Invention] In the conventional method, when the sedimentation tank is stirred, the fine particles are already dispersed in the tank, and even if the sedimentation tank is left still, the coarse particles settle, but the fine particles do not. It won't surface. Rather, since the fine particles move to the lower layer together with the coarse particles, the fine particles are mixed into the settling coarse particles and the classification accuracy is reduced.
本発明、は上記従来の問題点を解決し、粗粒子側への微
粒子の混入を大幅に低減することにより、少ないデカン
テーション回数にて効率的に分級を行なうことができる
湿式重力分級方法を提供することを目的とする。The present invention solves the above-mentioned conventional problems and provides a wet gravity classification method that allows efficient classification with fewer decantations by significantly reducing the incorporation of fine particles into the coarse particles. The purpose is to
［課題を解決するための手段］
本発明の湿式重力分級方法は、不混和性の重液及び軽液
を用いて該重液よりも比重の大きな粒子の分級を行なう
方法であって、重液の層の上側に、被分級粒子を軽液に
分散させてなる懸濁液を存在させ、大径粒子を重液中に
沈降させた後、小径粒子を含む軽液層と大径粒子を含む
重液層とを分離して分級を行なうことを特徴とする。[Means for Solving the Problems] The wet gravity classification method of the present invention is a method for classifying particles having a higher specific gravity than the heavy liquid using an immiscible heavy liquid and a light liquid. A suspension of particles to be classified in a light liquid is placed above the layer, and after the large particles are settled in the heavy liquid, a light liquid layer containing small particles and a light liquid layer containing large particles are formed. It is characterized by separating the heavy liquid layer and performing classification.
［作用］
かかる本発明方法にあっては、重液及び軽液が不混和性
であり、かつ比重差があるので、上側の軽液層と下側の
重液層とは混和しない。従って、軽液中の粒子は重液の
流れの影響を受けることなく重力の作用によってのみ軽
液から重液に移行する。（即ち、沈降する。）従って、
例えば粒子全体の約半分が重液に移行した時点で重液と
軽液とを分離すると、重液中には小径粒子は殆ど含まれ
ておらず、分級精度が極めて高い。[Function] In the method of the present invention, the heavy liquid and the light liquid are immiscible and have a difference in specific gravity, so the upper light liquid layer and the lower heavy liquid layer are not miscible. Therefore, the particles in the light liquid migrate from the light liquid to the heavy liquid only by the action of gravity without being affected by the flow of the heavy liquid. (i.e., settles out.) Therefore,
For example, if the heavy liquid and the light liquid are separated at the time when about half of the total particles have been transferred to the heavy liquid, the heavy liquid will contain almost no small-diameter particles and the classification accuracy will be extremely high.
以下に本発明の詳細な説明する。The present invention will be explained in detail below.
本発明において、軽液及び重液は不混和性であると共に
、さらに
■ 軽液、重液とも被分級粒子に対して濡れ易い。In the present invention, the light liquid and the heavy liquid are immiscible, and (1) both the light liquid and the heavy liquid easily wet the particles to be classified.
■ 軽液と重ｌ夜が接した時、発熱や気泡の発生等によ
る界面の乱れが生じない。■ When light liquid and heavy liquid come into contact, there is no disturbance at the interface due to heat generation or bubble formation.
ことが必要である。It is necessary.
従って、比重関係及び■、■の条件を満足するものであ
れば、用いる軽液と重液との組み合せは任意であるが、
例えば、次のような組み合せを例示することができる。Therefore, the combination of light liquid and heavy liquid to be used is arbitrary, as long as the specific gravity relationship and the conditions (1) and (2) are satisfied.
For example, the following combinations can be exemplified.
熱水／冷水
水７食塩水
水／ショ糖液
水／エチレングリコール水溶液
水／ポリビニルアルコール水溶液
イソプロピルアルコール／水
本発明においては、特に、被分級粒子と重液との比重差
は０．０１〜０．１、重液と軽液との比重差は０．０３
〜０．３程度であることが好ましい。Hot water/Cold water 7 Salt water/Sucrose solution/Ethylene glycol aqueous solution/Polyvinyl alcohol aqueous solution Isopropyl alcohol/Water In the present invention, in particular, the difference in specific gravity between the particles to be classified and the heavy liquid is 0.01 to 0. .1, the difference in specific gravity between heavy liquid and light liquid is 0.03
It is preferable that it is about 0.3.
本発明の実施にあたっては、例えば次のような方法を採
用するのが有利である。即ち、まず、下部に抜き出しバ
ルブを有する沈降槽を用意し、この沈降槽内に比重の大
きい重液（例えば水）を投入しておく。この沈降槽とし
ては、円筒形の槽底部が逆円錐形状にすぼまり、沈降す
る粒子を集めてその逆円錐形状の先端の抜き出しバルブ
から効率的に抜き出すことができるように構成されたも
のが好ましい。In implementing the present invention, it is advantageous to employ, for example, the following method. That is, first, a sedimentation tank having a discharge valve at the bottom is prepared, and a heavy liquid (for example, water) with a high specific gravity is charged into the sedimentation tank. This settling tank is constructed so that the bottom of the cylindrical tank narrows into an inverted conical shape, and the settling particles can be collected and efficiently extracted from the extraction valve at the tip of the inverted conical shape. preferable.
次いで、沈降槽中の下層の重液上に被分級粒子の軽液（
例えばイソプロピルアルコール）懸濁液を供給する。こ
の懸濁液の供給の際には、下層の重液の液面上に、開孔
を有する発泡スチロール製円板などの懸濁液が流通し得
る複数の開孔を有する部材を装置するのが好ましい。こ
のような部材を用いることにより、軽液と重液との界面
の乱れを防止することができ、重液側への微粒子の混入
を確実に防止することができる。また、粒子を層流で沈
降させるために、槽内の適当な箇所にハニカムを水平方
向に設置しても良い。なお、本発明において、軽液と重
液の使用割合には特に制限はなく、軽液と重液の物性や
被分級粒子の粒度分布等に応じて適宜決定される。軽液
に悲濁させる粒子の割合は体積割合で１〜３％程度とす
るのが好ましい。Next, a light liquid of particles to be classified (
(e.g. isopropyl alcohol) suspension. When supplying this suspension, it is recommended to install a member with a plurality of holes, such as a styrofoam disc with holes, above the liquid level of the lower layer of heavy liquid, through which the suspension can flow. preferable. By using such a member, it is possible to prevent the interface between the light liquid and the heavy liquid from being disturbed, and it is possible to reliably prevent fine particles from entering the heavy liquid side. Further, in order to cause the particles to settle in a laminar flow, a honeycomb may be installed horizontally at an appropriate location within the tank. In the present invention, there is no particular restriction on the ratio of the light liquid to the heavy liquid used, and it is appropriately determined depending on the physical properties of the light liquid and the heavy liquid, the particle size distribution of the particles to be classified, and the like. It is preferable that the proportion of particles that make the light liquid turbid is about 1 to 3% by volume.
重液上に被分級粒子を軽液に分散させた懸濁液を供給し
、上層の軽液中の被分級粒子のうちの大径粒子の沈降が
開始した後は、所定の沈降時間をおいた後、沈殿粒子を
沈降槽底部の抜き出しバルブから抜き出すと共に、上層
の軽液をサイホンで抜き出す。これにより、被分級粒子
中の大径粒子は沈殿粒子として回収され、また小径粒子
は上層の軽液中に回収され、被分級粒子は効率的に分級
される。A suspension of particles to be classified in a light liquid is supplied onto a heavy liquid, and after the large-diameter particles among the particles to be classified in the upper layer of the light liquid begin to settle, wait for a predetermined settling time. After that, the precipitated particles are extracted from the extraction valve at the bottom of the settling tank, and the light liquid in the upper layer is extracted using a siphon. As a result, the large-diameter particles among the particles to be classified are recovered as precipitated particles, and the small-diameter particles are recovered in the upper light liquid, so that the particles to be classified are efficiently classified.
本発明方法においては、軽液よりなる上層イ夜と重液よ
りなる下層液とは、不混和性を有すると共に比重差があ
るため、乱流は殆ど生じることかなく、大径粒子（粗粒
子）に小径粒子（微粒子）がまぎれ込んで沈降すること
も殆どない。In the method of the present invention, the upper layer consisting of a light liquid and the lower layer consisting of a heavy liquid are immiscible and have a difference in specific gravity, so turbulence hardly occurs, and large-diameter particles (coarse particles) ), there is almost no chance of small particles (fine particles) getting mixed in and settling out.
このため、粗粒子と微粒子とは極めて精度良く、効率的
に分級される。For this reason, coarse particles and fine particles are classified very accurately and efficiently.
［実施例コ 以下に実施例を挙げて本発明をより具体的に説明する。[Example code] EXAMPLES The present invention will be explained in more detail with reference to Examples below.
実施例１
内径２０ｃｍ、長さ２００ｃｍで、底部の逆円錐形部の
下端に抜き出しバルブを有する沈降槽を用いて、本発明
方法に従って分級を行なった。Example 1 Classification was carried out according to the method of the present invention using a sedimentation tank with an internal diameter of 20 cm and a length of 200 cm, with a take-off valve at the lower end of the inverted conical bottom.
被分級粒子及び用いた軽液、重液は下記の通りである。The particles to be classified and the light liquid and heavy liquid used are as follows.
被分級粒子：グルコマンナンを原料として製造した多孔
質球状粒子（比重
１．０５ｇ／ｃｒｎ’）（粒度分布
は第１図（ａ）に示す。）
軽 液：８０重量％イソプロピルアルコール（Ｉ ＰＡ
）
（比重ｏ、ａｏｇ／ｃｍ”）
重 液 ： 水 （比重１．０ｇ／ａｍ’）まず、沈
降槽内に深さ１５０ｃｍまで水を入れ、その上に１４０
ｍＩＬの被分級粒子を軽液１４℃中に懸濁させて供給し
た。この際、重液と軽液との界面を乱さずに軽液を注ぐ
ことができるように、下層の水面上に複数の流通孔を有
する発泡スチロール製円板を浮かべ、この上から静かに
被分級粒子を軽液に分散させた懸濁液を注いだ。Particles to be classified: Porous spherical particles (specific gravity 1.05 g/crn') manufactured using glucomannan as a raw material (particle size distribution is shown in Figure 1 (a)) Light liquid: 80% by weight isopropyl alcohol (IPA)
) (Specific gravity o, aog/cm") Heavy liquid: Water (Specific gravity 1.0 g/am') First, fill the settling tank with water to a depth of 150 cm, and add 140
Particles to be classified by mIL were suspended in a light liquid at 14° C. and supplied. At this time, so that the light liquid can be poured without disturbing the interface between the heavy liquid and the light liquid, a Styrofoam disk with multiple flow holes is floated on the water surface in the lower layer, and the classified object is gently placed on top of the disk. A suspension of particles dispersed in a light liquid was poured.
１２０分後、沈殿粒子を抜き出しバルブから抜き出した
。また、上層の軽液をサイホンで抜き出した。After 120 minutes, the precipitated particles were extracted and removed through the valve. In addition, the upper layer of light liquid was extracted using a siphon.
軽液中の粒子と回収した沈殿粒子とについて、それぞれ
コールタ−カウンターで粒度を測定した。測定結果を第
１図（ｂ）、（ｃ）に示す。The particle sizes of the particles in the light liquid and the recovered precipitated particles were each measured using a Coulter counter. The measurement results are shown in FIGS. 1(b) and 1(c).
第１図より明らかなように、沈殿粒子中の粒径２５μｍ
以下の微粒子の除去率は１００％であった。従って、本
発明の方法によれば、１回のデカンテーションで微粒子
を完全に除去することができることが確認された。As is clear from Figure 1, the particle size of the precipitated particles is 25 μm.
The removal rate of the following fine particles was 100%. Therefore, according to the method of the present invention, it was confirmed that fine particles could be completely removed by one decantation.
なお、回収した粒子の重量割合は上層のＩＰＡ層中に１
．３％、沈殿粒子７４．８％であり、残りの２３．９％
の粒子は、沈降槽内の水層中に残留した。The weight ratio of the recovered particles was 1 in the upper IPA layer.
．． 3%, precipitated particles 74.8%, remaining 23.9%
particles remained in the water layer in the settling tank.
［発明の効果］
以上詳述した通り、本発明の湿式重力分級方法によれば
、少ないデカンテーション回数にて、被分級粒子を効率
的に分級することが可能とされ、分級効率の向上、分級
精度の改善が図れる。[Effects of the Invention] As detailed above, according to the wet gravity classification method of the present invention, particles to be classified can be efficiently classified with a small number of decantations, and the classification efficiency is improved and the classification Accuracy can be improved.
第１図は実施例１における分級操作前後の粒度分布を示
すグラフ、第２図は従来法を示す模式的な説明図である
。
１・・・重力沈降分級槽、 ２・・・分散媒、３・・
・微粒子、 ４・・・粗粒子。FIG. 1 is a graph showing the particle size distribution before and after the classification operation in Example 1, and FIG. 2 is a schematic explanatory diagram showing the conventional method. 1... Gravity sedimentation classification tank, 2... Dispersion medium, 3...
・Fine particles, 4... Coarse particles.
Claims (1)
重の大きな粒子の分級を行なう方法であつて、 重液の層の上側に、被分級粒子を軽液に分散させてなる
懸濁液を存在させ、大径粒子を重液中に沈降させた後、
小径粒子を含む軽液層と大径粒子を含む重液層とを分離
して分級を行なうことを特徴とする湿式重力分級方法。(1) A method of classifying particles having a higher specific gravity than the heavy liquid using an immiscible heavy liquid and a light liquid, in which particles to be classified are dispersed in the light liquid above a layer of the heavy liquid. After precipitating the large particles into the heavy liquid,
A wet gravity classification method characterized by separating and classifying a light liquid layer containing small diameter particles and a heavy liquid layer containing large diameter particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31630789A JPH03178352A (en) | 1989-12-05 | 1989-12-05 | Wet gravitational classification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31630789A JPH03178352A (en) | 1989-12-05 | 1989-12-05 | Wet gravitational classification method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03178352A true JPH03178352A (en) | 1991-08-02 |
Family
ID=18075674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31630789A Pending JPH03178352A (en) | 1989-12-05 | 1989-12-05 | Wet gravitational classification method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03178352A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5720394A (en) * | 1994-07-15 | 1998-02-24 | Yazaki Corporation | Sample supply unit for settling classification system |
| JP2002346432A (en) * | 2001-05-23 | 2002-12-03 | Clariant (Japan) Kk | Method for classification of resin particles |
| JP2013230452A (en) * | 2012-04-03 | 2013-11-14 | Hitachi Chemical Co Ltd | Wet classification method |
-
1989
- 1989-12-05 JP JP31630789A patent/JPH03178352A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5720394A (en) * | 1994-07-15 | 1998-02-24 | Yazaki Corporation | Sample supply unit for settling classification system |
| JP2002346432A (en) * | 2001-05-23 | 2002-12-03 | Clariant (Japan) Kk | Method for classification of resin particles |
| JP2013230452A (en) * | 2012-04-03 | 2013-11-14 | Hitachi Chemical Co Ltd | Wet classification method |
| JP2017056459A (en) * | 2012-04-03 | 2017-03-23 | 日立化成株式会社 | Wet classification method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gibbs et al. | Coagulation and transport of sediments in the Gironde Estuary | |
| Alldredge et al. | The attachment probabilities of marine snow and their implications for particle coagulation in the ocean | |
| Anderson et al. | Sinking characteristics of dinoflagellate cysts 1 | |
| Hawley | Settling velocity distribution of natural aggregates | |
| Tobiason et al. | Physicochemical aspects of particle removal in depth filtration | |
| Logan et al. | Fractal geometry of marine snow and other biological aggregates | |
| Lagvankar et al. | A Size‐Density Relationship for Floes | |
| Gregory | The role of floc density in solid-liquid separation | |
| JP2005098704A (en) | Method for fractionating particulate of different specific gravity | |
| Gross et al. | Electron microscopy of the centrifuged sea urchin egg, with a note on the structure of the ground cytoplasm | |
| US3519400A (en) | Method of centrifugal separation and recovery of chemical species utilizing a liquid medium | |
| US4624763A (en) | Separation of dispersed phase from phase mixture | |
| Schubel et al. | Agglomeration of fine-grained suspended sediment in northern Chesapeake Bay | |
| Kallay et al. | A method for continuous preparation of uniform colloidal hematite particles | |
| Siano | Layered sedimentation in suspensions of monodisperse spherical colloidal particles | |
| Kotylar et al. | Effect of salt on the flocculation behavior of nano particles in oil sands fine tailings | |
| JPH03178352A (en) | Wet gravitational classification method | |
| Nielsen | Nucleation in barium sulfate precipitation | |
| Bhatty | Clusters formation during sedimentation of dilute suspensions | |
| Newman et al. | Settling and coagulation characteristics of fluorescent particles determined by flow cytometry and fluorometry | |
| Ives | Coagulation and flocculation: Part II—Orthokinetic flocculation | |
| Erzan et al. | Fractal geometry and size distribution of clay particles | |
| JP2905507B2 (en) | Particle classification method and apparatus | |
| Veerapaneni | Formation and morphology of colloidal deposits in porous media | |
| US1944479A (en) | Method of treating emulsions |