JPH03288557A - Manufacture of fine granular powder of oxidizer - Google Patents
Manufacture of fine granular powder of oxidizerInfo
- Publication number
- JPH03288557A JPH03288557A JP8818890A JP8818890A JPH03288557A JP H03288557 A JPH03288557 A JP H03288557A JP 8818890 A JP8818890 A JP 8818890A JP 8818890 A JP8818890 A JP 8818890A JP H03288557 A JPH03288557 A JP H03288557A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- fine granular
- collecting bag
- granular powder
- static electricity
- 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
- 239000000843 powder Substances 0.000 title claims abstract description 28
- 239000007800 oxidant agent Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000000835 fiber Substances 0.000 claims abstract description 20
- 230000005611 electricity Effects 0.000 abstract description 10
- 230000003068 static effect Effects 0.000 abstract description 10
- 238000010298 pulverizing process Methods 0.000 abstract description 7
- 238000004880 explosion Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical compound FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 abstract description 3
- 238000005406 washing Methods 0.000 abstract description 3
- 102100025840 Coiled-coil domain-containing protein 86 Human genes 0.000 abstract 2
- 101000932708 Homo sapiens Coiled-coil domain-containing protein 86 Proteins 0.000 abstract 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 abstract 2
- 230000000593 degrading effect Effects 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 7
- 239000004744 fabric Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 208000034809 Product contamination Diseases 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Landscapes
- Filtering Materials (AREA)
- 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、吸湿性酸化剤を乾燥気体を用い、衝突式気流
粉砕機により粉砕し、粉砕された微粒粉体を捕集する酸
化剤微粒粉体の製造方法に関するものである。Detailed Description of the Invention [Industrial Field of Application] The present invention provides oxidizing agent fine particles that are obtained by crushing a hygroscopic oxidizing agent using a dry gas using a collision-type air flow crusher and collecting the crushed fine powder. This invention relates to a method for producing powder.
衝突式気流粉砕機は、第１図に示すごとく、原料粉体を
供給口ｌから気流中に送り込み、粉砕室２において供給
口３から乾燥気体を送り込み、超音速ノズルでマツハ２
．５以上の気流を発生させ、ノズル内での気流の撹乱に
よる粒子相互間の衝突で粉砕を行うと同時に、ノズル前
方の衝突板に固気准合流を衝突させて粉砕する。粉砕さ
れた粉体は、サイクロンセパレータ４からサイクロン内
筒５に送られることにより分級され、小さな粒子は捕集
袋６で分離される。また、大きな粒子は、再び循環パイ
プ７を通って粉砕室２に送られ粉砕される。この粉砕法
は、粒径が１μ以下の粉体を得る目的で使用される。As shown in Fig. 1, the collision type airflow crusher feeds raw material powder into the airflow from the supply port 1, feeds dry gas from the supply port 3 in the crushing chamber 2, and then uses supersonic nozzles to
．． 5 or more air currents are generated, and the particles are pulverized by colliding with each other due to the disturbance of the air flow within the nozzle, and at the same time, the solid-air quasi-mixture is made to collide with the collision plate in front of the nozzle, thereby pulverizing the particles. The pulverized powder is sent from the cyclone separator 4 to the cyclone inner cylinder 5 to be classified, and small particles are separated by a collection bag 6. Moreover, large particles are sent to the grinding chamber 2 again through the circulation pipe 7 and are ground. This pulverization method is used for the purpose of obtaining powder having a particle size of 1 μm or less.
その際、従来の捕集袋６の構造は、布地を円筒形に縫製
し端末を結束したものであり、その布地は天然繊維や、
合成繊維等が用いられている。At that time, the structure of the conventional collection bag 6 is that the fabric is sewn into a cylindrical shape and the ends are tied together, and the fabric is made of natural fibers,
Synthetic fibers are used.
しかし、この捕集袋は、粉砕時に帯電電圧最大８万Ｖの
静電気が発生する。これは、エネルギー的に粉しん爆発
を誘起するに充分なエネルギーであり、また、静電気が
発生するための粉体の捕集も容易ではなく、その静電気
を除去する方法として静電気防止剤の使用が考えられた
が、帯ｔ！圧を大巾に下げる効果はなく、袋の洗濯等に
よる繰り返しがきかないいわゆる持続性がなかった。ま
た製品への汚染等が懸念された。However, this collection bag generates static electricity with a charging voltage of up to 80,000 V when crushed. This is enough energy to induce a dust explosion, and it is not easy to collect the powder because it generates static electricity, so the use of antistatic agents is a method to remove static electricity. I thought about it, but Obi T! It did not have the effect of significantly lowering the pressure, and it did not have the so-called sustainability that it could not be repeated by washing the bag. There were also concerns about product contamination.
さらに、湿度調整でも可能であるが吸湿性粉体の場合、
再凝集して微粒粉体を得ることができにくかった。Furthermore, it is possible to adjust the humidity, but in the case of hygroscopic powder,
It was difficult to re-agglomerate and obtain fine powder.
本発明者は、吸湿性酸化剤を乾燥気体を用い、衝突式気
流粉砕機により粉砕する際、捕集袋における静電気の発
生を防止し、粉じん爆発の防止、粉砕された微粒粉体（
１μ以下）の回収を容易にすることを目的として、種々
検討を行った結果、導電性繊維を含有する捕集袋を用い
ることにより、上記問題点が解決されることを見出し、
本発明を充放した。The present inventor has developed a method that prevents the generation of static electricity in the collection bag when pulverizing a hygroscopic oxidizing agent using dry gas using a collision-type airflow pulverizer, prevents dust explosions, and pulverizes the pulverized fine powder (
As a result of various studies aimed at facilitating the collection of particles (less than 1μ), it was discovered that the above problems could be solved by using a collection bag containing conductive fibers.
The present invention has been fully utilized.
すなわち、本発明は、吸湿性酸化剤を乾燥気体を用い、
衝突式気流粉砕機により粉砕し、粉砕された微粒粉体を
、導電性繊維を含む捕集袋にて捕集することを特徴とす
る酸化剤微粒粉体の製造方法である。That is, the present invention uses a dry gas for a hygroscopic oxidizing agent,
This is a method for producing fine oxidizing agent powder, which is characterized in that the fine powder is crushed by an impact type airflow crusher and the fine powder is collected in a collection bag containing conductive fibers.
本発明における捕集袋は、粉砕物が気体と共に送り込ま
れるため、気体を内側から外側へ通過することと、微粒
粉体を外側へ出さないことが前提である。従って、捕集
袋の材質は、導電性物質の織り込みが可能であり、微粒
粉体を捕集し、気体を通過させる網目構造をもつポリエ
ステル、ポリアミド等の合成繊維、綿、麻等の天然繊維
でできているものであれば特に制限はない。In the collecting bag of the present invention, since the crushed material is sent together with the gas, it is premised that the gas is allowed to pass from the inside to the outside and that the fine powder is not released to the outside. Therefore, the material of the collection bag is synthetic fiber such as polyester or polyamide, or natural fiber such as cotton or hemp, which can be woven with a conductive substance and has a mesh structure that collects fine powder and allows gas to pass through. There are no particular restrictions as long as it is made of.
この捕集袋に含有させる導電性物質の材質は、鉄、銅等
導電性を有するものであれば良いが、錆等の腐食の点よ
り、ステンレスワイヤが良好である。この導電性物質の
形状は、綿状（単線又は複線）、帯状等が良いが、粉砕
により得られた微粒粉体を取り出すため、捕集袋は、自
在に変形することが必要であるので、単線の場合０．５
閣以下、帯状の場合厚さ０．５ ｍ以下、幅５ＩＩＩＩ
ｎ以下が好ましい、また、繰り返し使用する場合の変形
時に断線がないよう０．１１１１１以下の線状物を束ね
た複線を入れることがさらに好ましい。The material of the conductive substance contained in this collection bag may be any conductive material such as iron or copper, but stainless steel wire is preferable from the viewpoint of corrosion such as rust. The shape of this conductive material is preferably cotton-like (single wire or double wire), band-like, etc., but in order to take out the fine powder obtained by crushing, the collection bag needs to be able to deform freely. 0.5 for single line
Below the cabinet, in the case of a strip, the thickness is 0.5 m or less, and the width is 5III.
It is preferable that the wire is less than n, and it is more preferable to insert a double wire made by bundling wires of 0.11111 or less so that there is no breakage during deformation during repeated use.
また、導電性物質の入れ方としては、捕集袋の機軸方向
にのみ入れる場合は、袋の径に対して複数本人れること
が必要であり、粉砕する粉体によって異なるが、静電気
を低下させるためには、導電性繊維間の間隔は１０ｃｍ
以下が良い。さらに、粉じん爆発を引き起こす下限の物
質を考えると、５ｃ１１１以下がさらに好ましい。また
、円周方向に入れる場合の間隔は、機軸方向と同しであ
るがその場合は、各導電性繊維を連結するために機軸方
向に導電性繊維を１本以上入れる必要がある。また、機
軸、円周方向の組み合わせもとりうる。また、布への入
れ方は、布を織る時に多糸と共に織り込んでも良いし、
布の状態で導電性繊維を縫い込むことも可能である。In addition, when inserting conductive substances only in the axial direction of the collection bag, it is necessary to insert more than one person per the diameter of the bag, and this will vary depending on the powder to be crushed, but it will reduce static electricity. For this, the spacing between the conductive fibers is 10cm
The following is good. Furthermore, considering the lower limit of substances that cause dust explosions, 5c111 or less is more preferable. Further, when inserted in the circumferential direction, the spacing is the same as in the machine axis direction, but in that case, it is necessary to insert one or more conductive fibers in the machine axis direction in order to connect each conductive fiber. Further, a combination of the machine axis and the circumferential direction is also possible. Also, as for how to put it into the cloth, you can weave it together with multiple threads when weaving the cloth,
It is also possible to sew conductive fibers into the fabric.
また、この捕集袋の帯電を外部へ逃がす方法としては、
粉砕機本体に捕集袋を接触させることで充分ではあるが
、捕集袋の端末にアースを取ることにより、さらに効果
がある。In addition, as a method to release the electrostatic charge of this collection bag to the outside,
Although it is sufficient to bring the collection bag into contact with the crusher body, it is even more effective to ground the end of the collection bag.
本発明における吸湿性酸化剤とは、過塩素酸アンモニウ
ム、硝酸アンモニウム等の通常固体推進薬に用いられる
酸化剤のことであり、水分を吸湿しやすい物質のことで
ある。また、粉砕に用いられる酸化剤の粒径としては、
５０〜４５０μ摺が好ましく、更に１００〜２５０μｍ
が好ましい。The hygroscopic oxidizing agent in the present invention refers to an oxidizing agent commonly used in solid propellants, such as ammonium perchlorate and ammonium nitrate, and is a substance that easily absorbs moisture. In addition, the particle size of the oxidizing agent used for pulverization is as follows:
50 to 450 μm is preferable, and more preferably 100 to 250 μm
is preferred.
［実施例］ 以下、実施例によって本発明を具体的に説明する。[Example] Hereinafter, the present invention will be specifically explained with reference to Examples.
実施例１
捕集袋の形状は、直径５０ｃｍ、長さ３００ｃｍとし、
材質は、ポリエステル系繊維とした。この円筒状袋の機
軸方向に、導電性繊維として直径０．０５釦のスチレン
ワイヤ約５０本束ねた繊維状物を２００間隔毎にポリエ
ステル系布の中に縫い込んだ。Example 1 The shape of the collection bag is 50 cm in diameter and 300 cm in length.
The material was polyester fiber. In the axial direction of this cylindrical bag, conductive fibers made of about 50 bundles of styrene wires each having a diameter of 0.05 buttons were sewn into the polyester fabric at intervals of 200.
この捕集袋を、第２図に示す如く固定し、Ｎ２ガスを用
い、約２００μｍの過塩素酸アンモニウムの粉砕を実施
した。この時、捕集袋に発生する帯電電圧を測定し、下
記に示す弐を用いて火花のエネルギーを求めた。その結
果を、第１表に示す。This collection bag was fixed as shown in FIG. 2, and ammonium perchlorate of about 200 μm was pulverized using N2 gas. At this time, the charged voltage generated on the collection bag was measured, and the energy of the spark was determined using the second instrument shown below. The results are shown in Table 1.
実施例２
導電性繊維を入れる間隔を５ＣＩｌ＋とする以外は、実
施例１と同様に実施した。その結果を第１表に示す。Example 2 The same procedure as in Example 1 was carried out except that the interval between conductive fibers was set to 5CIl+. The results are shown in Table 1.
実施例３
補集袋の材質をポリアミド繊維とし、導電性繊維の入れ
る間隔を２ｃ１１１とする以外は、実施例１と同様に実
施した。その結果を第１表に示す。Example 3 The same procedure as in Example 1 was carried out except that the material of the collection bag was polyamide fiber and the interval between conductive fibers was 2c111. The results are shown in Table 1.
比較例
捕集袋を導電性繊維の入れていないポリエステル系繊維
とし、被粉砕物を塩化カリウムとする以外は、実施例１
と同様に実施した。その結果を第１表に示す。Comparative Example Example 1 except that the collection bag was made of polyester fibers without conductive fibers and the material to be crushed was potassium chloride.
It was carried out in the same way. The results are shown in Table 1.
以下余白 第１表 注１） 電子顕微鏡にて観察 〔発明の効果〕 本発明は、次に示すような効果をもつことが判った。Margin below Table 1 Note 1) Observation with an electron microscope 〔Effect of the invention〕 It has been found that the present invention has the following effects.
■）吸湿性酸化剤を乾燥気体を用いて、衝突式気流粉砕
機により粉砕する際、静電気の発生を抑制し、紛しん爆
発の危険性を回避することが可能となった。(2) When pulverizing a hygroscopic oxidizing agent using dry gas using an impact-type airflow pulverizer, it is now possible to suppress the generation of static electricity and avoid the risk of an explosion due to dust.
２） これに伴い、微粒粉体の捕集袋より回収する作業
が容易となった。2) Along with this, it has become easier to collect fine powder from collection bags.
３） 捕集袋の洗濯等により、静電気発生を抑制する効
果が減少することなく、繰り返し使用が可能となった。3) The collection bag can be used repeatedly without decreasing its effectiveness in suppressing static electricity generation by washing, etc.
第１図は、従来の衝突式気流粉砕機の一実施態様の正面
図、第２図は、本発明に用いる衝突式気流粉砕機の一実
施態様の正面図である。
１は粉体供給口、２は粉砕室、３は気体供給口、４はサ
イクロンセパレータ、５はサイクロン内筒、６は捕集袋
、マは循環パイプ、８は導電性繊維を含む捕集袋、９は
導電性繊維。
第
■
図FIG. 1 is a front view of an embodiment of a conventional impingement type air flow crusher, and FIG. 2 is a front view of an embodiment of the collision type air flow crusher used in the present invention. 1 is a powder supply port, 2 is a crushing chamber, 3 is a gas supply port, 4 is a cyclone separator, 5 is a cyclone inner cylinder, 6 is a collection bag, M is a circulation pipe, 8 is a collection bag containing conductive fibers , 9 is a conductive fiber. Figure ■
Claims (1)
り粉砕し、粉砕された微粒粉体を導電性繊維を含む捕集
袋にて捕集することを特徴とする酸化剤微粒粉体の製造
方法An oxidizing agent fine powder, which is characterized in that a hygroscopic oxidizing agent is crushed using a dry gas in an impact-type airflow crusher, and the crushed fine powder is collected in a collection bag containing conductive fibers. Production method
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8818890A JPH03288557A (en) | 1990-04-04 | 1990-04-04 | Manufacture of fine granular powder of oxidizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8818890A JPH03288557A (en) | 1990-04-04 | 1990-04-04 | Manufacture of fine granular powder of oxidizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03288557A true JPH03288557A (en) | 1991-12-18 |
Family
ID=13935927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8818890A Pending JPH03288557A (en) | 1990-04-04 | 1990-04-04 | Manufacture of fine granular powder of oxidizer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03288557A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009034648A (en) * | 2007-08-03 | 2009-02-19 | Freunt Ind Co Ltd | Filter medium for trapping particulate, bag filter and cartridge filter using the same, and granulating coating apparatus |
| RU2467991C1 (en) * | 2011-06-07 | 2012-11-27 | Открытое акционерное общество "Научно-исследовательский институт полимерных материалов" | Method of producing ground fraction of ammonium perchlorate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58104642A (en) * | 1981-12-11 | 1983-06-22 | タイオキサイド・グル−プ・ピ−エルシ− | Fluid energy impact type mill |
-
1990
- 1990-04-04 JP JP8818890A patent/JPH03288557A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58104642A (en) * | 1981-12-11 | 1983-06-22 | タイオキサイド・グル−プ・ピ−エルシ− | Fluid energy impact type mill |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009034648A (en) * | 2007-08-03 | 2009-02-19 | Freunt Ind Co Ltd | Filter medium for trapping particulate, bag filter and cartridge filter using the same, and granulating coating apparatus |
| RU2467991C1 (en) * | 2011-06-07 | 2012-11-27 | Открытое акционерное общество "Научно-исследовательский институт полимерных материалов" | Method of producing ground fraction of ammonium perchlorate |
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