粉体工学会誌

空気圧による粉体の微量流出量調整について

寺地信治, 日高重助, 三輪茂雄

1993 年 30 巻 10 号 p. 690-694
発行日: 1993/10/10
公開日: 2010/04/30

DOIhttps://doi.org/10.4164/sptj.30.10_690

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Making the best of the constancy in the flow-rate through a narrow nozzle, a low flow-rate (about 0.1-0.5kg/h) feeder for fine particles which had a graded narrow range was developed.
The flow-rate of a nozzle is changed within some range by reducing the air pressure above the aperture with a pump connected to the pressure transmitter, so it can detect the small pressure differences (±0.5Pa). A laser sensor is useful for the control of the flow-rate by computer for the change in the flow rate by condition change.

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ロール転動式ミルと高性能遠心分級機閉回路微粉砕システムの特性について

浅井信義, 山本修, 牧野哲久, 古川猛, 伊藤光弘, 二宮浩行

1993 年 30 巻 10 号 p. 695-702
発行日: 1993/10/10
公開日: 2010/04/30

DOIhttps://doi.org/10.4164/sptj.30.10_695

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This paper reports on the results of a test involving the grinding of silica sand, talc and limestone using a closed-circuit fine-grinding system built by combining Szego Mill, by a vertical ring roller mill, and by O-SEPA which is a high-performance system.
The test results are as follows:
(1) Lower specific power consumption was available by increasing the load power of the Szego Mill.
(2) By increasing rotations of main shaft of the Szego Mill, the specific surface area of the ground material was increased. It was found that an optimum rotation of the main shaft existed for each type of ground material.
(3) Comparing the result of grinding talc using this grinding system with that of grinding using a jet mill to obtain a fine powder of BET specific surface area while maintaning the original scaliness, this system consumed power as low as 1/16 compared with that of grinding through a jet mill.

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乾式分散機の性能評価

増田弘昭, 後藤邦彰

1993 年 30 巻 10 号 p. 703-708
発行日: 1993/10/10
公開日: 2010/04/30

DOIhttps://doi.org/10.4164/sptj.30.10_703

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Several kinds of powders were dispersed into the air by use of mixer type and nozzle-jet type dry dispersers, and the size distributions of the dispersed aerosol particles were measured. In the data analysis, a newly defined dispersion efficiency was introduced in order to represent the dispersion state of aerosols. On the other hand, the adhesion characteristic value representing the inter-particle adhesive force was obtained through the particle-reentrainment test developed in our laboratry. The data treatment made it possible to quantitatively evaluate the disperser performance for different kinds of powders. It was found that the dispersion efficiency was well correlated with the adhesion characteristic value if the mass flow ratio between particles and air was kept constant. Therefore, the dispersion efficiency of an arbitrary powder can be estimated by the particle-reentrainment test.

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空隙率分布を連続的に変化させた多孔体の作製法

李元徳, 岩田政司, 中村正秋, 外山茂樹

1993 年 30 巻 10 号 p. 709-712
発行日: 1993/10/10
公開日: 2010/04/30

DOIhttps://doi.org/10.4164/sptj.30.10_709

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微粒子に働く最大静電気力の検討

増田弘昭, 松坂修二

1993 年 30 巻 10 号 p. 713-716
発行日: 1993/10/10
公開日: 2010/04/30

DOIhttps://doi.org/10.4164/sptj.30.10_713

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希土類ボンド磁石の最近の進歩

武下拓夫

1993 年 30 巻 10 号 p. 717-727
発行日: 1993/10/10
公開日: 2010/04/30

DOIhttps://doi.org/10.4164/sptj.30.10_717

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真空下の物理的処理法による

銅-アルミナ系複合粒子の製造に関する基礎研究

加賀寿

1993 年 30 巻 10 号 p. 736-738
発行日: 1993/10/10
公開日: 2010/04/30

DOIhttps://doi.org/10.4164/sptj.30.10_736

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