JPH0321356A - Pulverizing apparatus - Google Patents
Pulverizing apparatusInfo
- Publication number
- JPH0321356A JPH0321356A JP15446989A JP15446989A JPH0321356A JP H0321356 A JPH0321356 A JP H0321356A JP 15446989 A JP15446989 A JP 15446989A JP 15446989 A JP15446989 A JP 15446989A JP H0321356 A JPH0321356 A JP H0321356A
- Authority
- JP
- Japan
- Prior art keywords
- pulverizing
- collision member
- nozzle
- collision
- nozzles
- 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.)
- Granted
Links
- 238000010298 pulverizing process Methods 0.000 title claims abstract description 46
- 239000007787 solid Substances 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 abstract description 21
- 230000004888 barrier function Effects 0.000 abstract 6
- 238000009434 installation Methods 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 10
- 239000011802 pulverized particle Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- -1 carbide Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910003470 tongbaite Inorganic materials 0.000 description 1
Landscapes
- Disintegrating Or Milling (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、固形物の粉砕を圧縮空気エネルギーで行う旋
回流式ジェットミルの改良、特に粉砕における消費エネ
ルギーおよび粉砕粒度分布が改良される微粉砕装置に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement of a swirl jet mill that uses compressed air energy to grind solid matter, and particularly to a fine grinding device that improves the energy consumption during grinding and the particle size distribution of the grind. Regarding.
従来の技術
従来の旋回粉砕室を有する旋回流式ジェットミル（以下
、単にジェットミルという）は、圧縮空気を粉砕ノズル
より噴射させ、その高速空気流のエネルギーにより粒子
相互の衝突を起こし、固形物を粉砕し、更に高速空気流
の起こす旋回流により、粒子を遠心分級し、目的とする
粉砕粒径を有する粒子を得ていた。BACKGROUND OF THE INVENTION Conventional swirl flow jet mills (hereinafter simply referred to as jet mills) having a swirling grinding chamber inject compressed air from a grinding nozzle, and use the energy of the high-speed air flow to cause particles to collide with each other, thereby crushing solids. The particles were then centrifugally classified using a swirling flow generated by a high-speed air flow to obtain particles having the desired pulverized particle size.
ジェットミルの長所としては、圧縮空気の噴射を利用す
る為、断熱膨脹作用による温度低下が起こり、熱を嫌う
固形物の粉砕も可能であること、更に、粒子相互の衝突
、即ち、表面粉砕が主であることより微粉砕に適すると
いう利点があげられる。逆に短所としては、大量の圧縮
空気を使用するため、大型コンプレッサーが必要となり
、粉砕消費エネルギーが機械式ミルに比べ、２〜５倍と
非常に大きいこと、更に粒子相互の衝突が主であるため
、超微粉が発生し易く、また、衝突回数の少ない粒子は
粗粉のまま排出され、粉砕粒度分布が広くなることなど
があげられる。Jet mills have the advantage of using compressed air jets, which lowers the temperature due to the adiabatic expansion effect, making it possible to crush heat-sensitive solids.Furthermore, the jet mill eliminates collisions of particles with each other, i.e., surface crushing. It has the advantage that it is more suitable for fine pulverization than the main one. On the other hand, the disadvantages are that it uses a large amount of compressed air, so a large compressor is required, and the energy consumption for grinding is 2 to 5 times greater than that of a mechanical mill.Furthermore, particles mainly collide with each other. Therefore, ultrafine powder is likely to be generated, and particles that have a small number of collisions are discharged as coarse powder, resulting in a wide pulverized particle size distribution.
発明が解決しようとする課題
上記の短所のうち、粉砕粒度分布が広くなることに対す
る改善は、粗粉分級機と組み合わせ、粉砕機で目的粉砕
粒径より大きめに粉砕し、粗粉分級機によって分級し、
粗粉は再度粉砕機へ戻し、目的の粉砕粒径を得る閉回路
粉砕方式を採用することで、かなり拉度分布の狭い粉砕
が可能となった。しかしながら粉砕消費エネルギーに関
しては、依然改良できずにいる。Problems to be Solved by the Invention Among the above disadvantages, the improvement of the wide pulverized particle size distribution is to combine it with a coarse particle classifier, use the pulverizer to crush the particles to a size larger than the target pulverized particle size, and classify the particles using the coarse particle classifier. death,
The coarse powder is returned to the pulverizer again, and by adopting a closed-circuit pulverization method to obtain the desired pulverized particle size, it has become possible to pulverize with a fairly narrow ablation distribution. However, the energy consumption of crushing has not yet been improved.
実開昭５１−１００３７４号、同５１−１００３７５号
、同５６−６４７５４号公報、および特開昭５８−１４
３８５３号公報に記載の粉砕機は、単一粉砕ノズル対単
一衝突板方式のもので、粉砕機単体ではジェットミルに
比べ、粉砕粒度分布が広くなるという欠点を有するため
、粗粉分級機との組み合わせが必須となる。また、単一
ノズルの為、大型機へのスケールアップは、効率が落ち
るので行えないという欠点を有している。特開昭５７−
８４７５６号公報に記載の粉砕機は、連通管を有するた
め、粉砕ノズルの本数が多い場合は、構造が複雑となり
、実用的ではない。Utility Model Application No. 51-100374, 51-100375, 56-64754, and JP-A-58-14
The pulverizer described in Publication No. 3853 has a single pulverizing nozzle and a single collision plate system, and the pulverizer itself has the disadvantage that the pulverized particle size distribution is wider than that of a jet mill. A combination of these is required. Furthermore, since it uses a single nozzle, it has the disadvantage that it cannot be scaled up to a larger machine because efficiency will drop. Japanese Unexamined Patent Publication 1987-
Since the pulverizer described in Japanese Patent No. 84756 has a communicating pipe, the structure becomes complicated when the number of pulverizing nozzles is large, which is not practical.
本発明は、従来の技術における上記のような欠点を改良
することを目的としてなされたものである。The present invention has been made with the aim of improving the above-mentioned drawbacks in the conventional technology.
即ち、本発明の目的は、粉砕ノズルの噴射方向の前方に
衝突部材を設置し、粒子間の衝突と粒子の衝突部材への
衝突という２つの力を有効に利用し、粉砕エネルギー効
率が高く、かつ粉砕粒度分布の狭い粉砕物を生産する微
粉砕装置を提供するものである。That is, an object of the present invention is to install a collision member in front of a crushing nozzle in the jetting direction, effectively utilize the two forces of collision between particles and collision of particles with the collision member, and achieve high crushing energy efficiency. The present invention also provides a pulverizing device that produces a pulverized product with a narrow pulverized particle size distribution.
課題を解決するための手段
本発明は、粉砕室内で圧縮空気を複数の粉砕ノズルから
噴射し、固形物を粉砕する旋回流式ジェットミルよりな
る微粉砕装置において、各粉砕ノズルの噴射方向前方に
、噴射空気が衝突するように衝突部材を設けたことを特
徴とする。Means for Solving the Problems The present invention provides a pulverizing apparatus consisting of a swirl jet mill that injects compressed air from a plurality of pulverizing nozzles into a pulverizing chamber to pulverize solid materials. , a collision member is provided so that the jet air collides with the jet air.
本発明の微粉砕装置について、実施例に相当する図面に
よって説明すると、本発明の微粉砕装置は、旋回粉砕室
Ｂ内で圧縮空気を複数の粉砕ノズル３から噴射して固形
物を粉砕する旋回流式ジェットミルよりなり、そして、
各粉砕ノズル３の噴射方向前方に衝突部材２を設け、粉
砕ノズルからの噴射空気が衝突部材２に衝突するように
構成されている。The pulverizing apparatus of the present invention will be described with reference to drawings corresponding to embodiments. Consists of a flow jet mill, and
A collision member 2 is provided in front of each crushing nozzle 3 in the injection direction, and the configuration is such that the jet air from the crushing nozzle collides with the collision member 2.
本発明において、衝突部材の設置位置は、粉砕ノズルか
らの噴射空気の中心方向を００としたとき、衝突部材の
衝突面の中心が２０＠以内の頂角を有する円錐形範囲に
あるようするのが好ましく、また衝突部材の衝突面先端
と粉砕ノズル先端との距離が、ポテンシャルコアゾーン
の５倍以下であるのが好ましい。In the present invention, the installation position of the collision member is such that the center of the collision surface of the collision member is within a conical range having an apex angle of 20 @ or less, when the center direction of the air jetted from the crushing nozzle is set to 00. It is preferable that the distance between the tip of the collision surface of the collision member and the tip of the crushing nozzle is 5 times or less than the potential core zone.
衝突部材は、合金、表面処理金属、またはセラミックか
ら形威された、球形、卵形、円柱形または円錐形の形状
を有するものが使用でき、また、この衝突部材のサイズ
としては、噴射空気の中心方向に対して垂直な而又は断
面の面積が、粉砕ノズルの最小内径部の断面積の５０倍
以下であることが好ましい。The impingement member can be made of alloy, surface-treated metal, or ceramic and has a spherical, oval, cylindrical, or conical shape, and the size of the impingement member is limited to the size of the jet air. It is preferable that the cross-sectional area perpendicular to the center direction is 50 times or less the cross-sectional area of the minimum inner diameter portion of the crushing nozzle.
作用
本発明の微粉砕装置において、複数の粉砕ノズルから噴
射された圧縮空気は、圧縮空気噴射方向前方に設けた衝
突部材に衝突するので、利用されずに消費されている圧
縮空気エネルギーを有効に粉砕に活用することができる
。Function: In the pulverizing device of the present invention, the compressed air injected from the plurality of pulverizing nozzles collides with the collision member provided forward in the compressed air injection direction, so that the compressed air energy that is not used and is consumed can be effectively utilized. It can be used for crushing.
実施例 本発明の実施例を図面によって説明する。Example Embodiments of the present invention will be described with reference to the drawings.
第１図は、本発明の微粉砕装置の平面図であり、第２図
は第１図のＡ−Ａ’線断面図である。図中、ｌは微粉砕
装置本体、２は衝突部材、３は粉砕ノズル、４は圧縮空
気室、５は排出管、Ｂは旋回粉砕室、７は衝突部材支持
部品である。FIG. 1 is a plan view of the pulverizer of the present invention, and FIG. 2 is a sectional view taken along the line AA' in FIG. In the figure, l is the main body of the pulverizer, 2 is a collision member, 3 is a crushing nozzle, 4 is a compressed air chamber, 5 is a discharge pipe, B is a rotating crushing chamber, and 7 is a collision member support component.
本発明の微粉砕装置においては、旋回式ジェットミル本
体ｌの旋回粉砕室Ｂ内に、衝突部材２を粉砕ノズル３の
噴射方向前方に、各噴射ノズルに対応して設け、それに
より利用されずに消費されている圧縮空気エネルギーを
有効に粉砕に活用することができる。In the pulverizing device of the present invention, the collision member 2 is provided in the rotating crushing chamber B of the rotating jet mill main body 1, in front of the crushing nozzle 3 in the injection direction, corresponding to each injection nozzle, so that the collision member 2 is not used. The compressed air energy that is currently consumed can be effectively used for crushing.
衝突部材の設置位置については、粉砕ノズルからの噴射
空気の中心方向を０＠とすると、衝突部材の衝突面の中
心が２０＠以内の頂角を有する円錐形範囲にあり、好ま
しくは、噴射された圧縮空気の中心方向、即ちＯ＠であ
る。２０″の角度を越えると、衝突部材の衝突面が噴射
された圧縮空気の流れから外れる割合が大きくなり、衝
突部材の効゛果がなくなる。また、距離については、圧
縮空気をノズルより噴射した場合、噴射された圧縮空気
が有効なエネルギーを有するゾーンをポテンシャルコア
ゾーン（通常、ノズル内径の５倍）と呼ぶが、衝突部材
の衝突面先端と粉砕ノズル先端との距離が前記ポテンシ
ャルコアゾーンの５倍以内、好ましくは２〜３倍とする
のが望ましい。上記距離が５倍を越える場合は、他のノ
ズルからの噴射空気を乱したり、粒子の分級効果を有す
る旋回流を乱し、逆に粉砕効果を低下させる原因となる
。Regarding the installation position of the collision member, assuming that the center direction of the jet air from the crushing nozzle is 0@, the center of the collision surface of the collision member is in a conical range having an apex angle of 20@ or less, and preferably, The center direction of the compressed air, that is, O@. If the angle exceeds 20", the collision surface of the collision member will deviate from the flow of the injected compressed air, and the effectiveness of the collision member will be lost. Also, regarding the distance, it is important to note that In this case, the zone where the injected compressed air has effective energy is called the potential core zone (usually 5 times the inner diameter of the nozzle), but the distance between the tip of the collision surface of the collision member and the tip of the crushing nozzle is 5 times the potential core zone. If the above distance exceeds 5 times, it may disturb the air injected from other nozzles or the swirling flow that has the effect of classifying particles, and vice versa. This causes a reduction in the crushing effect.
次に、衝突部材の形状としては、球形、円柱形、卵形お
よび円錐形等があげられるが、球形が好ましい。更に衝
突部材の大きさは、前記設置距離の理由と同様、他のノ
ズルからの噴射された圧縮空気を乱したり、旋回流を乱
したりしない範囲の大きさがよく、噴射空気の中心方向
に対して垂直な面又は断面の面積が、粉砕ノズルの最小
内径部の断面積の５０倍以下であるのが望ましい。Next, the shape of the collision member includes a spherical shape, a cylindrical shape, an oval shape, a conical shape, etc., but a spherical shape is preferable. Furthermore, the size of the collision member should be within a range that does not disturb the compressed air injected from other nozzles or the swirling flow, similar to the reason for the above-mentioned installation distance, and should be within a range that does not disturb the compressed air injected from other nozzles or disturbs the swirling flow. It is desirable that the area of the plane or cross section perpendicular to the crushing nozzle is 50 times or less the cross-sectional area of the minimum inner diameter portion of the crushing nozzle.
衝突部材の材質は、耐摩耗性のものならば問題なく使用
することができる。特に、耐摩耗性合金、耐摩耗表面処
理金属、セラミックス等が望ましい。Any wear-resistant material can be used for the collision member without any problem. In particular, wear-resistant alloys, wear-resistant surface-treated metals, ceramics, etc. are desirable.
衝突部材の材質の例として、合金類としては、超硬ヲ始
め、コバルトベースのステライト合金、ニッケルベース
のデロロ合金、鉄ベースのデルクロム合金、トライスチ
ル合金、およびトリバロイ金属間化合物があげられ、セ
ラミックスとしては、アルミナ、チタニア、ジルコニア
等の酸化物、炭化ケイ素、炭化クロム等の炭化物、窒化
ケイ素、窒化チタン等の窒化物、硼化クロム、硼化チタ
ン等の硼化物等があげられる。Examples of collision member materials include alloys such as carbide, cobalt-based Stellite alloy, nickel-based Deloro alloy, iron-based Delchrome alloy, TriStyl alloy, and Tribaloy intermetallic compound, and ceramics. Examples include oxides such as alumina, titania, and zirconia, carbides such as silicon carbide and chromium carbide, nitrides such as silicon nitride and titanium nitride, and borides such as chromium boride and titanium boride.
本発明の微粉砕装置を使用して微粉砕を行う場合の具体
例を以下に示す。A specific example of pulverization using the pulverizer of the present invention is shown below.
第１図および第２図に示す微粉砕装置を使用した。この
微粉砕装置は、旋回粉砕室内径４２０ ｗφ、旋回粉砕
室円周部高さ５０１１％中心部高さ１００ ｍｔａで、
旋回粉砕室中心底部に内径１８８ｅｍφ、高さ７４ｍｍ
の排出管を有していた。また、旋回粉砕室円周部の粉砕
ノズルは、内径５．２＋ａｍφのラバーノズル４個を中
心方向から３５度ずらせた角度に設置し、原料は旋回粉
砕室蓋部よりエアーインジエクションノズルの作用によ
って供給されるようにした。上記のジェットミルよりな
る微粉砕装置とミクロンセパレーター（ホソカワミクロ
ン■製）を組み合わせて閉回路粉砕システムとし、以下
の条件で粉砕を行った。A pulverizer shown in FIGS. 1 and 2 was used. This fine grinding device has a rotating grinding chamber diameter of 420 wφ, a circumferential height of the rotating grinding chamber of 5011%, a center height of 100 mta,
Inner diameter 188emφ, height 74mm at the center bottom of the rotating crushing chamber
It had a discharge pipe. In addition, the crushing nozzles on the circumference of the rotating crushing chamber are four rubber nozzles with an inner diameter of 5.2+amφ and are installed at an angle of 35 degrees from the center, and the raw material is fed through the air injection nozzle from the lid of the rotating crushing chamber. Powered by A closed-circuit pulverization system was prepared by combining the above-mentioned jet mill pulverizer and a micron separator (manufactured by Hosokawa Micron ■), and pulverization was carried out under the following conditions.
実施例１
衝突部材 個数 ４個
設置距離 ２２ＩｌｌＩ１
形状 円柱
大きさ １８ｍｍφＸ３５ｍ＋ｓ材質
ＳＵＳ３０４
粉砕条件 粉砕圧 ７．６ ｋｇ／ｃｊＧ供給圧
６．０ ｋｇ／ｃｊＧ
排気風量 １１−１２ｍ’ ／ｍ１ｎ二次空気風ｊ
１ １．２ 〜１．５ ｍ’ ／ｓｈｉｎ電子写真用
トナー材料のハンマーミル破砕物（重量平均粒径Ｄ ５
ｏ− ３００〜５００ ｌｍ）を原料とし、重量平均粒
径Ｄ５０（以下、ｉｌｌにＤ，。と言う）が１１浦にな
るように上記の条件で粉砕し、粒度分布をコールターカ
ウンターＴＡ一■（コールターエレクトロニクス社製）
で測定した。その結果を第１表に示す。Example 1 Collision member Number of pieces 4 Installation distance 22IllI1 Shape Cylinder size 18mmφX35m+s Material
SUS304 Grinding conditions Grinding pressure 7.6 kg/cjG Supply pressure 6.0 kg/cjG Exhaust air volume 11-12m'/m1n Secondary air wind j
1 1.2 to 1.5 m'/shin Hammer mill crushed product of electrophotographic toner material (weight average particle diameter D 5
o-300 to 500 lm) was used as a raw material, pulverized under the above conditions so that the weight average particle diameter D50 (hereinafter referred to as "ill") was 11 pores, and the particle size distribution was measured using a Coulter counter TA1 ( Manufactured by Coulter Electronics)
It was measured with The results are shown in Table 1.
比較例１
粉砕室内に衝突部材を設けない構造とした以外は、実施
例１と同じ条件でＤ５ｏ−１１ＩＩＩｍになる様に粉砕
を行った。その結果を第１表に示す。Comparative Example 1 Grinding was carried out under the same conditions as in Example 1 to obtain D5o-11IIIm, except that no collision member was provided in the grinding chamber. The results are shown in Table 1.
実施例２
衝突部材の衝突面の中心を、粉砕ノズルの噴射中心方向
に正確に設置した以外は、実施例１と同じ条件でＤｓｏ
””１１−になる様に粉砕を行った。Example 2 Dso was carried out under the same conditions as Example 1, except that the center of the collision surface of the collision member was placed accurately in the direction of the jet center of the crushing nozzle.
Grinding was carried out so that the particle size was 11-.
実施例３
衝突部材の衝突面の中心を、粉砕ノズルの噴射中心方向
から粉砕室外周方向へ水平に１５″ずらした以外は、実
施例１と同じ条件でＤ，。−１１−になる様に粉砕を行
った。Example 3 Same conditions as Example 1 except that the center of the collision surface of the collision member was shifted horizontally by 15'' from the direction of the injection center of the crushing nozzle toward the outer circumferential direction of the crushing chamber so that D, -11-. Shredded.
実施例４
衝突部材の設置距離（衝突部材の衝突面先端と粉砕ノズ
ル先端との距Ｍ）を８０ｍ■とした以外は、実施例２と
同じ条件でＤ５０””１１−になる様に粉砕を行った。Example 4 Pulverization was carried out under the same conditions as Example 2, except that the installation distance of the collision member (distance M between the tip of the collision surface of the collision member and the tip of the crushing nozzle) was 80 m. went.
実施例５
衝突部材の設置距離を１４０ ｍｍとした以外は、実施
例２と同じ条件でＤ５ｏ＝ｌｌＩＩ！ｍになる様に粉砕
を行った。Example 5 D5o=llII! under the same conditions as Example 2 except that the installation distance of the collision member was 140 mm. It was ground to a size of m.
実施例６
衝突部材の形状を球形（１６ｍｍφ）とした以外は、実
施例４と同じ条件でＤ ５０−１１ｍになる様に粉砕を
行った。Example 6 Pulverization was carried out under the same conditions as in Example 4, except that the shape of the collision member was spherical (16 mmφ) to give a D of 50-11 m.
実施例７
衝突部材の形状を四角柱（１８ｍｍＸｌ８關Ｘ ３０ｍ
園）とし、四角柱の平面部分が粉砕ノズルと対向するよ
うに設置した以外は、実施例４と同じ条件で０５０＝ｌ
ｌａになる様に粉砕を行った。Example 7 The shape of the collision member was a square prism (18 mm x 8 inches x 30 m
050=l under the same conditions as Example 4, except that the flat part of the square prism was installed so as to face the crushing nozzle.
The powder was crushed so that it became la.
実施例８
衝突部材の形状を球形（２０關φ）とした以外は、実施
例４と同じ条件でＤ，。−１１ｍになる様に粉砕を行っ
た。Example 8 D, under the same conditions as Example 4 except that the shape of the collision member was spherical (20 mm diameter). It was crushed to a length of -11 m.
実施例９
衝突部材の形状を球形（３７闘φ）とした以外は、実施
例４と同じ条件でＤｓｏ−１１ＪＪＩＩＩになる様に粉
砕を行った。Example 9 Pulverization was carried out under the same conditions as in Example 4, except that the shape of the collision member was changed to a spherical shape (37mm diameter) to obtain Dso-11JJIII.
以上の実施例および比較例の結果を第１表に示す。Table 1 shows the results of the above examples and comparative examples.
以下余白
実施例と比較例の比較から明らかなように、ジェットミ
ルの旋回粉砕室に衝突部材を設置することにより、粉砕
消費エネルギーが低減でき、かつ、粒度分布がシャープ
な粉砕物が得られることが分かる。As is clear from the comparison of the blank examples and comparative examples below, by installing a collision member in the rotating crushing chamber of the jet mill, the energy consumption of crushing can be reduced and a crushed product with a sharp particle size distribution can be obtained. I understand.
実施例１〜３の比較から、衝突部材の設置位置（衝突部
材の衝突面中心の粉砕ノズル噴射中心方向からのズレ）
の最適化をはかることにより、粉砕消費エネルギーをさ
らに低減することができる。From the comparison of Examples 1 to 3, the installation position of the collision member (deviation of the center of the collision surface of the collision member from the direction of the crushing nozzle jet center)
By optimizing the pulverization energy consumption, it is possible to further reduce the energy consumption.
粉砕ノズル（ラバール管）圧縮空気の拡散状態と実施例
３の結果から判断すると、衝突部材の設置位置の範囲は
、ノ′ズルの中心方向０″より±ｌＯ″以内（すなわち
、衝突部材の衝突面の中心から、粉砕ノズルからの噴射
空気の中心方向で２０″以内の頂角を有する円錐形範囲
）であれば、圧縮空気のエネルギーを有効に利用するこ
とができ、好ましくは、０″である。Judging from the diffusion state of compressed air in the crushing nozzle (Laval tube) and the results of Example 3, the range of the installation position of the collision member is within ±lO" from 0" in the center direction of the nozzle (i.e., the range of the collision member The energy of the compressed air can be used effectively if the apex angle is within 20'' from the center of the surface in the direction of the center of the air jetted from the crushing nozzle. be.
実施例２、４、５の比較から、衝突部材の設置距離の最
適化をはかることにより、粉砕消費エネルギーをさらに
低減できることが確認された。設置距離の範囲としては
、使用する粉体により最適距離が異なるが、粉砕ノズル
から噴射される圧縮空気のエネルギーが最大であるポテ
ンシャルコアゾーンはもちろん、粒子の巻き込み、加速
ゾーン及び他の粉砕ノズルから噴射される圧縮空気流へ
の干渉ゾーン、旋回分散ゾーンへの干渉を考慮すると、
ボレンシャルコアゾーンは２６＋ｕ （５ Ｘ５．２關
：ノズル内径）であり、その５倍以下の範囲は０〜１３
０ ｍｍであって、この範囲内であるのが好ましい。From a comparison of Examples 2, 4, and 5, it was confirmed that the crushing energy consumption could be further reduced by optimizing the installation distance of the collision member. The optimum installation distance range varies depending on the powder used, but it can be used not only in the potential core zone, where the energy of the compressed air injected from the crushing nozzle is maximum, but also in the particle entrainment, acceleration zone, and injected from other crushing nozzles. Considering the interference zone to the compressed air flow and the interference to the swirl dispersion zone,
The volencial core zone is 26+u (5 x 5.2: nozzle inner diameter), and the range of 5 times or less is 0 to 13
0 mm, and preferably within this range.
実施例４、６、７、の比較から、衝突部材の形状の最適
化をはかることにより、粉砕消費エネルギーをさらに低
減できることが確認された。衝突部材の形状は、粉砕ノ
ズルから噴射される圧縮空気流を乱さない形状であるの
が好ましく、球形、卵形、円柱形、円錐形、特に球形′
が効果があることが分かる。From a comparison of Examples 4, 6, and 7, it was confirmed that the crushing energy consumption could be further reduced by optimizing the shape of the collision member. The shape of the collision member is preferably a shape that does not disturb the compressed air flow injected from the crushing nozzle, and may be spherical, oval, cylindrical, conical, especially spherical.
is found to be effective.
さらに、実施例８及び９の比較から、衝突部材の大きさ
の最適化をはかることにより、粉砕消費エネルギーをさ
らに低減できることが確認された。Furthermore, from a comparison of Examples 8 and 9, it was confirmed that by optimizing the size of the collision member, the energy consumption for crushing could be further reduced.
衝突部材の大きさの範囲としては、粉砕ノズルから噴Ｈ
される圧縮空気の広がりと、衝突部材の設置範囲から、
粉砕ノズルの最小内径部の断面積の５０倍以下が好まし
いことが分かる。なお、実施例８及び９の場合、粉砕ノ
ズルの最小内径部断面積の５０倍は１０８１＋＋ｕｓ’
（−１／４ Ｘ（５．２） ’ ｘ ３．ｌ４ｘ５
０）であり、実施例８は３１４ ｍｍ２、実施例９は１
０７５ｍｍ’である。The size range of the collision member is as follows:
From the spread of the compressed air and the installation range of the collision member,
It can be seen that the cross-sectional area of the minimum inner diameter portion of the crushing nozzle is preferably 50 times or less. In the case of Examples 8 and 9, 50 times the cross-sectional area of the minimum inner diameter of the crushing nozzle is 1081++us'
(-1/4 X (5.2) ' x 3.l4x5
0), Example 8 is 314 mm2, Example 9 is 1
075mm'.
実施例１０
実施例１〜９において使用した微粉砕装置を使用して、
４本の粉砕ノズルに対向するそれぞれの衝突部材として
、超硬（材質ＷＩＩ４０、日立金属側製）、粉末高速度
工具鋼（ＩＩＡＰ４０ 、日立金属沖製）、サイアロン
（ＩＩＣＮＩＯ 、日立金属■製）及びＳＵＳ３０４を
用い、実施例２と同じ条件で、磁性粉含有樹脂のハンマ
ーミル粉砕物（３００〜５００ｍ）を原料とし、原料供
給量２０ｋｇ／Ｉ１で４時間粉砕を行い、衝突部材の摩
耗重量変化（摩耗度）を測定した。各粉砕ノズルの差を
なくすために、１時間毎に衝突部材の位置を交換し、測
定を行った。その結果を第２表に示す。Example 10 Using the pulverizer used in Examples 1 to 9,
The collision members facing the four crushing nozzles were made of carbide (material WII40, manufactured by Hitachi Metals), powdered high-speed tool steel (IIAP40, manufactured by Hitachi Metals Oki), sialon (IICNIO, manufactured by Hitachi Metals), and Using SUS304 and under the same conditions as in Example 2, using a hammer mill pulverized product (300 to 500 m) of magnetic powder-containing resin as a raw material, pulverization was performed for 4 hours at a raw material supply rate of 20 kg/I1, and the wear weight change of the collision member ( degree of wear) was measured. In order to eliminate the difference between each crushing nozzle, the position of the collision member was changed every hour and measurements were taken. The results are shown in Table 2.
第２表 ・
肋摩耗度ｉ （Ｗ＋−＋ −Ｗ＋ ） ／Ｗ＋−＋
Ｘｌ００ （１−１．２，３．４）〔Ｖは衝突部材
重量 Ｃｔ）、 量はサンプリング時間（ｈｒ） ）上
記の結果から明らかなように、超硬は、ＳＯＳＳ０４の
９８．８倍、ｌＩＡＰ４０は７ｌ．２倍、サイアロンは
５５，４倍であり、いずれも良好な耐摩耗性が得られた
。Table 2 Rib wear degree i (W+-+ -W+) /W+-+
Xl00 (1-1.2, 3.4) [V is collision member weight Ct), quantity is sampling time (hr)) As is clear from the above results, carbide is 98.8 times that of SOSS04, lIAP40 is 7l. 2 times, and Sialon was 55.4 times, and good abrasion resistance was obtained in both cases.
発明の効果
以上の結果から明らかなように、本発明の微粉砕装置は
各粉砕ノズルの噴射方向前方に衝突部材を設けたから、
消費エネルギーが低減され、かつ、粉砕粒度分布のシャ
ープな粉砕が可能になる。さらに、耐摩耗材質により、
摩耗性の強い粉体の粉砕も可能である。Effects of the Invention As is clear from the above results, the pulverizing device of the present invention has a collision member in front of each pulverizing nozzle in the injection direction.
Energy consumption is reduced and pulverization with a sharp pulverization particle size distribution becomes possible. In addition, the wear-resistant material
It is also possible to grind highly abrasive powders.
第１図は、本発明の微粉砕装置の一例の平面図であり、
第２図は、第１図のＡ−Ａ’線断面図である。
ｌ・・・微粉砕装置本体、２・・・衝突部材、３・・・
粉砕ノズル、４・・・圧縮空気室、５・・・排出管、６
・・・旋回粉砕室、７・・・衝突部材支持部品。FIG. 1 is a plan view of an example of the pulverization device of the present invention,
FIG. 2 is a sectional view taken along the line AA' in FIG. 1. l... Fine grinding device main body, 2... Collision member, 3...
Grinding nozzle, 4... Compressed air chamber, 5... Discharge pipe, 6
... Rotating crushing chamber, 7... Collision member support parts.
Claims (6)
し、固形物を粉砕する旋回流式ジェットミルよりなる微
粉砕装置において、各粉砕ノズルの噴射方向前方に、噴
射空気が衝突するように衝突部材を設けたことを特徴と
する微粉砕装置。(1) In a pulverizing device consisting of a swirl flow jet mill that pulverizes solids by injecting compressed air from multiple pulverizing nozzles in a pulverizing chamber, the jet air collides with the front of each pulverizing nozzle in the jetting direction. A pulverizing device characterized by being provided with a collision member.
たとき、衝突部材の衝突面の中心が２０゜以内の頂角を
有する円鍾形範囲に設置されたことを特徴とする特許請
求の範囲第１項に記載の微粉砕装置。(2) A patent claim characterized in that when the center direction of the air jetted from the crushing nozzle is 0°, the center of the collision surface of the collision member is installed in a circular circular range having an apex angle of 20° or less. The pulverizing device according to item 1.
が、ポテンシャルコアゾーンの５倍以下であることを特
徴とする特許請求の範囲第２項に記載の微粉砕装置。(3) The pulverizer according to claim 2, wherein the distance between the tip of the collision surface of the collision member and the tip of the pulverization nozzle is five times or less the potential core zone.
り選ばれることを特徴とする特許請求の範囲第３項に記
載の微粉砕装置。(4) The pulverizer according to claim 3, wherein the collision member is selected from spherical, oval, cylindrical, and conical shapes.
直な面又は断面の面積が、粉砕ノズルの最小内径部の断
面積の５０倍以下であることを特徴とする特許請求の範
囲第４項に記載の微粉砕装置。(5) Claim 4, characterized in that the area of the plane or cross section perpendicular to the central direction of the jetted air in the collision member is 50 times or less the cross-sectional area of the minimum inner diameter portion of the crushing nozzle. The pulverizing device described in .
およびセラミックスより選ばれることを特徴とする特許
請求の範囲第５項に記載の微粉砕装置。(6) The material of the collision surface of the collision member is an alloy, a surface-treated metal,
The pulverizer according to claim 5, characterized in that the pulverizer is selected from ceramics and pulverizers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1154469A JPH0757326B2 (en) | 1989-06-19 | 1989-06-19 | Pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1154469A JPH0757326B2 (en) | 1989-06-19 | 1989-06-19 | Pulverizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0321356A true JPH0321356A (en) | 1991-01-30 |
| JPH0757326B2 JPH0757326B2 (en) | 1995-06-21 |
Family
ID=15584930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1154469A Expired - Fee Related JPH0757326B2 (en) | 1989-06-19 | 1989-06-19 | Pulverizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0757326B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215321A (en) * | 2010-04-08 | 2011-10-12 | 联咏科技股份有限公司 | Mobile detection method and device |
| JP5849951B2 (en) * | 2010-07-30 | 2016-02-03 | ホソカワミクロン株式会社 | Jet mill |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57190656A (en) * | 1981-05-20 | 1982-11-24 | Hosokawa Micron Kk | Air current type crushing classifying device |
-
1989
- 1989-06-19 JP JP1154469A patent/JPH0757326B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57190656A (en) * | 1981-05-20 | 1982-11-24 | Hosokawa Micron Kk | Air current type crushing classifying device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102215321A (en) * | 2010-04-08 | 2011-10-12 | 联咏科技股份有限公司 | Mobile detection method and device |
| JP5849951B2 (en) * | 2010-07-30 | 2016-02-03 | ホソカワミクロン株式会社 | Jet mill |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0757326B2 (en) | 1995-06-21 |
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