JPH054332B2 - - Google Patents
Info
- Publication number
- JPH054332B2 JPH054332B2 JP62309314A JP30931487A JPH054332B2 JP H054332 B2 JPH054332 B2 JP H054332B2 JP 62309314 A JP62309314 A JP 62309314A JP 30931487 A JP30931487 A JP 30931487A JP H054332 B2 JPH054332 B2 JP H054332B2
- Authority
- JP
- Japan
- Prior art keywords
- magnesium oxide
- powder
- raw material
- granulation
- granulating
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 29
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 21
- 239000000395 magnesium oxide Substances 0.000 claims description 20
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 19
- 239000011230 binding agent Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 description 14
- 230000003179 granulation Effects 0.000 description 14
- 239000002904 solvent Substances 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000012776 electronic material Substances 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- MUHFRORXWCGZGE-KTKRTIGZSA-N 2-hydroxyethyl (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCCO MUHFRORXWCGZGE-KTKRTIGZSA-N 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000011356 non-aqueous organic solvent Substances 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 238000001694 spray drying Methods 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は成形用酸化マグネシウム原料の造粒方
法に係り、特に電子材料及び磁性材料焼成用鞘等
の製造に好適な成形用酸化マグネシウム原料の造
粒方法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for granulating a magnesium oxide raw material for molding, and in particular to a method for granulating a magnesium oxide raw material for molding, which is suitable for producing electronic materials and sheaths for firing magnetic materials. Regarding a granulation method.
［従来の技術］
従来、電子材料や磁性材料の焼成に用いられる
酸化マグネシウム製鞘等の成形には、主にプレス
成形法が採用されている。このプレス成形法に用
いられる原料は、酸化マグネシウムの微粉を造粒
したものが用いられており、その造粒方法は、混
合造粒、強制造粒、熱利用型等に分類され、各々
多数の方法が知られている。[Prior Art] Conventionally, a press molding method has been mainly used for molding magnesium oxide sheaths and the like used for firing electronic materials and magnetic materials. The raw material used in this press molding method is granulated fine powder of magnesium oxide, and the granulation methods are classified into mixed granulation, forced granulation, heat utilization type, etc., and there are various methods for each. method is known.
ところで、プレス成形法においては、原料の流
動性が得られる製品の品質を決定する極めて重要
な因子となる。従来、流動性の高い造粒粉を得る
ためには、専ら噴霧乾燥造粒法が採用されてい
る。 By the way, in the press molding method, the fluidity of the raw material is an extremely important factor that determines the quality of the product obtained. Conventionally, in order to obtain granulated powder with high fluidity, a spray drying granulation method has been exclusively employed.
［発明が解決しようとする問題点］
しかしながら、酸化マグネシウムは水和性を有
するため、噴霧乾燥造粒法においては、スラリー
調製用の懸濁溶媒に非水系有機溶媒を多量に使用
しなければならない。このため、造粒に要する費
用が多額になり、製造コストの高騰を招いてい
た。しかも、非水系有機溶媒は、作業者への悪影
響、環境汚染問題を引き起す可能性があるため、
その使用は極力避るべきである。[Problems to be solved by the invention] However, since magnesium oxide is hydratable, in the spray drying granulation method, a large amount of non-aqueous organic solvent must be used as a suspending solvent for slurry preparation. . For this reason, the cost required for granulation becomes large, leading to a rise in manufacturing costs. Moreover, non-aqueous organic solvents can have a negative impact on workers and cause environmental pollution problems.
Its use should be avoided as much as possible.
［問題点を解決するための手段］
本発明の成形用酸化マグネシウム原料の造粒方
法は、酸化マグネシウム粉末を、界面活性剤を含
むバインダ溶液を用いて撹拌混合法により１次造
粒した後、解砕法により粒度を揃えることを特徴
とする。[Means for Solving the Problems] The method for granulating a magnesium oxide raw material for molding of the present invention involves first granulating magnesium oxide powder by a stirring and mixing method using a binder solution containing a surfactant, and then It is characterized by uniform particle size using a crushing method.
以下、本発明を詳細に説明する。 The present invention will be explained in detail below.
本発明においては、まず、酸化マグネシウム原
料を粉砕し、好ましくは平均粒径１〜2μｍ程度
の微粉を得る。これをヘンシエルミキサ等の混合
機に、界面活性剤を含むバインダ溶液と共に投入
し、酸化マグネシウム微粉をバインダ溶液と混合
して撹拌混合造粒を行なう。ここで用いるバイン
ダ溶液は、3.0〜40重量％、特に20重量％程度の
バインダを含有する溶液に対して、１〜60重量％
程度の界面活性剤を添加したものが好適である。
なお、バインダとしては、一般に、ポリビニルブ
チラール等が用いられ、その溶媒としてはエチル
アルコール等が用いられる。界面活性剤としては
ステアリン酸等が用いられる。 In the present invention, first, a magnesium oxide raw material is pulverized to obtain a fine powder preferably having an average particle size of about 1 to 2 μm. This is put into a mixer such as a Henschel mixer together with a binder solution containing a surfactant, and the fine magnesium oxide powder is mixed with the binder solution and granulated with stirring. The binder solution used here is 1 to 60% by weight relative to the solution containing about 3.0 to 40% by weight, especially about 20% by weight of binder.
It is preferable to add a certain amount of surfactant.
Note that polyvinyl butyral or the like is generally used as the binder, and ethyl alcohol or the like is used as the solvent. Stearic acid or the like is used as the surfactant.
また、用いるバインダ溶液の量は、酸化マグネ
シウム微粉に対する重量割合で５〜15重量％とす
るのが好ましい。 Further, the amount of the binder solution used is preferably 5 to 15% by weight relative to the magnesium oxide fine powder.
なお、本発明において、混合機としては、ヘン
シエルミキサの他、ニーダー、アイリツヒミキサ
等を用いることもできる。 In addition, in the present invention, as the mixer, in addition to the Henschel mixer, a kneader, an Eiritzhi mixer, etc. can also be used.
次いで、撹拌混合造粒して得られた撹拌造粒物
を解砕造粒機により、ハンマー等の解砕具で粉砕
し、スクリーンを通して粒度を下げ、かつ粒度を
整える。 Next, the stirred granules obtained by stirring and granulating are crushed by a crushing tool such as a hammer using a crushing granulator, and passed through a screen to reduce and adjust the particle size.
解砕造粒機としては、回転ナイフ（垂直）型、
回転ナイフ（水平）型、回転バー型等の解砕造粒
機を用いることができる。 As crushing and granulating machines, rotating knife (vertical) type,
A crushing and granulating machine such as a rotating knife (horizontal) type or a rotating bar type can be used.
このような本発明の方法によれば、60〜600μ
ｍの範囲に粒径分布を有する、流動性に極めて優
れた酸化マグネシウム造粒粉が得られる。 According to such a method of the present invention, 60 to 600μ
Magnesium oxide granulated powder with extremely excellent fluidity and having a particle size distribution in the range of m is obtained.
［作用］
本発明は、原料粉体を撹拌混合法と解砕法の２
段階の造粒工程を経る複合造粒法により造粒する
ものである。[Function] The present invention provides two methods for preparing raw material powder: a stirring and mixing method and a crushing method.
Granulation is performed by a composite granulation method that involves a step-by-step granulation process.
本発明の複合造粒法では、撹拌混合時に混合機
の回転羽根の回転により、原料の酸化マグネシウ
ム粉が回転・流動する際に、バインダ溶液が適度
に分散・混合される。このため、スラリーを調製
する必要がなく、また、バインダ溶液の溶媒のみ
で造粒が可能となるので、使用する溶媒量は少量
で良く、人体・環境に対する影響が極めて小さ
い。 In the composite granulation method of the present invention, the binder solution is appropriately dispersed and mixed when the raw material magnesium oxide powder is rotated and fluidized by the rotation of the rotary blade of the mixer during stirring and mixing. Therefore, there is no need to prepare a slurry, and granulation can be performed using only the solvent of the binder solution, so only a small amount of solvent can be used, and the impact on the human body and environment is extremely small.
また、解砕法においては、解砕具により解砕さ
れた粉体はスクリーンを通過して、粒径が小さく
粒度が均一な、高特性酸化マグネシウム粉が得ら
れる。 In addition, in the crushing method, the powder crushed by the crusher passes through a screen to obtain high-quality magnesium oxide powder with small particle size and uniform particle size.
［実施例］
以下、実施例及び比較例を挙げて本発明をより
具体的に説明するが、本発明はその要旨を超えな
い限り、以下の実施例に限定されるものではな
い。[Examples] Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples unless it exceeds the gist thereof.
実施例 １
平均粒径1.6μｍの電融酸化マグネシウム1000ｇ
と、界面活性剤（「ポリノン０−44」鐵野化成製
（主成分：ポリエチレングリコールモノオレー
ト））5.0ｇを添加した、20重量％バインダ溶液
（「セルナSE−604」中京油脂製（主成分：ワツク
ス類、溶媒：エチルアルコール）75ｇとをヘンシ
エルミキサにて200〜600rpmで３分間撹拌混合造
粒した。次いで、得られた造粒物を解砕造粒機に
て900rpmで回転するハンマーで衝撃粉砕した。Example 1 1000g of fused magnesium oxide with an average particle size of 1.6μm
and a 20% by weight binder solution (“Cerna SE-604” manufactured by Chukyo Yushi Co., Ltd. (main component: polyethylene glycol monooleate)) to which 5.0 g of surfactant (“Polynon 0-44” manufactured by Tetsuno Kasei Co., Ltd. (main component: polyethylene glycol monooleate)) was added. : waxes, solvent: ethyl alcohol) were mixed and granulated by stirring at 200 to 600 rpm for 3 minutes in a Henschel mixer.Then, the resulting granules were crushed and granulated using a hammer rotating at 900 rpm in a crushing granulator. Shattered by impact.
このようにして得られた造粒粉は、流動性が高
く、固め見掛比重は2.00、圧縮度は6.3％であつ
た。また、この造粒粉を1000Kg／cm2のプレス圧で
成形したところ、成形体の密度は2.72ｇ／cm3と極
めて高密度であつた。 The granulated powder thus obtained had high fluidity, a compacted apparent specific gravity of 2.00, and a degree of compaction of 6.3%. Further, when this granulated powder was molded at a press pressure of 1000 kg/cm 2 , the density of the molded product was extremely high at 2.72 g/cm 3 .
実施例 ２
界面活性剤、バインダ溶液を下記のものに代え
たこと以外は、実施例１と同様にして造粒を行な
つた。Example 2 Granulation was carried out in the same manner as in Example 1, except that the surfactant and binder solution were replaced with those shown below.
界面活性剤：
種類；ポリエチレングリコール
（平均分子量400）
（和光純薬工業製）
使用量；5.0ｇ
バインダ溶液：
バインダ：ポリビニルブチラール
（「Ｇ−7211」第一工業製薬製）
溶媒：エチルアルコール
濃度：18.8重量％
使用量：80ｇ
得られた造粒粉は、流動性が高く、固め見掛比
重は1.93、圧縮度は10.1％であつた。また、この
造粒粉を1000Kg／cm2のプレス圧で成形したとこ
ろ、成形体の密度は2.51ｇ／cm3と極めて高密度で
あつた。 Surfactant: Type: Polyethylene glycol (average molecular weight 400) (manufactured by Wako Pure Chemical Industries) Amount used: 5.0g Binder solution: Binder: Polyvinyl butyral (“G-7211” manufactured by Daiichi Kogyo Seiyaku) Solvent: Ethyl alcohol Concentration: 18.8% by weight Amount used: 80g The obtained granulated powder had high fluidity, an apparent compacted specific gravity of 1.93, and a degree of compaction of 10.1%. Further, when this granulated powder was molded at a press pressure of 1000 kg/cm 2 , the density of the molded product was extremely high at 2.51 g/cm 3 .
比較例 １
実施例１で用いた電融マグネシア原料1000ｇを
2.0の溶媒（エチルアルコール）に懸濁させて
スラリーを調製し、これをスプレードライヤー装
置により噴霧乾燥して造粒した。Comparative Example 1 1000g of the electrofused magnesia raw material used in Example 1 was
2.0 to prepare a slurry, which was spray-dried using a spray dryer and granulated.
得られた造粒粉の流動性は実施例１，２で得ら
れたものに比べて相当に劣り、固め見掛比重は
1.58、圧縮度は17.4％であり、1000Kg／cm2のプレ
ス圧で成形したところ、成形体の密度は2.40ｇ／
cm3であつた。 The fluidity of the obtained granulated powder was considerably inferior to that obtained in Examples 1 and 2, and the apparent specific gravity of the solidified powder was
1.58, the compression degree is 17.4%, and when molded with a press pressure of 1000 kg/cm 2 , the density of the molded product is 2.40 g/cm 2.
It was warm at cm3 .
［発明の効果］
以上詳述した通り、本発明の成形用酸化マグネ
シウム原料の造粒方法は、撹拌混合法と解砕法と
の複合造粒法であつて、溶媒使用量を大幅に低減
することができるので、安全な作業環境下で安価
にかつ効率的に酸化マグネシウム造粒粉を得るこ
とができる。しかも、得られる造粒粉は極めて粒
度分布の整つた粉体であることから、その流動性
は著しく高く、電子材料、磁性材料焼成用鞘等の
高特性を要求される酸化マグネシウム成形体の成
形用原料粉として、極めて有用である。[Effects of the Invention] As detailed above, the method of granulating the magnesium oxide raw material for molding of the present invention is a composite granulation method of a stirring and mixing method and a crushing method, and the amount of solvent used can be significantly reduced. As a result, magnesium oxide granulated powder can be obtained efficiently and at low cost in a safe working environment. Moreover, since the obtained granulated powder has an extremely uniform particle size distribution, its fluidity is extremely high, and it can be used to mold magnesium oxide compacts that require high properties such as electronic materials and sheaths for firing magnetic materials. It is extremely useful as raw material powder.
Claims (1)
バインダ溶液を用いて撹拌混合法により１次造粒
した後、解砕法により粒度を揃えることを特徴と
する成形用酸化マグネシウム原料の造粒方法。1. A method for granulating a magnesium oxide raw material for molding, which comprises first granulating magnesium oxide powder by a stirring and mixing method using a binder solution containing a surfactant, and then adjusting the particle size by a crushing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309314A JPH01153515A (en) | 1987-12-07 | 1987-12-07 | Method for granulating magnesium oxide raw material for forming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309314A JPH01153515A (en) | 1987-12-07 | 1987-12-07 | Method for granulating magnesium oxide raw material for forming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01153515A JPH01153515A (en) | 1989-06-15 |
| JPH054332B2 true JPH054332B2 (en) | 1993-01-19 |
Family
ID=17991522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62309314A Granted JPH01153515A (en) | 1987-12-07 | 1987-12-07 | Method for granulating magnesium oxide raw material for forming |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01153515A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2830670B2 (en) * | 1992-12-29 | 1998-12-02 | キヤノン株式会社 | Optical scanning device |
| JP2013251503A (en) * | 2012-06-04 | 2013-12-12 | Toshiba Corp | Current-voltage nonlinear resistor and manufacturing method thereof |
-
1987
- 1987-12-07 JP JP62309314A patent/JPH01153515A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01153515A (en) | 1989-06-15 |
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