巻号一覧
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34 巻, 10 号
選択された号の論文の8件中1～8を表示しています
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三輪の確率モデルの検証と展開尾崎 都司正, 三輪 茂雄, 原 敬1997 年 34 巻 10 号 p. 750-758
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーPowder technology requires fusion with other technologies in order to reduce environmental impacts. There is no definitive screening model, even in the screening process, in powder technology. In this paper, the modeling of a screening process is tried by using information theory. The obtained equation is identical to Miwa'sprobability model, which includes previous research on the screening process introduced into screening time. In addition, the relationship between the residue probability and the screening time can be derived by information theory. It is shown that the separation of screening is not so complete in limited screening time, and the way of obtaining the particle distribution is proposed. This research shows that the screening process is the same as the transmission of information and that the conception of other engineering is useful to systematize existing knowledge and promote the fusion of technologies.抄録全体を表示PDF形式でダウンロード (860K) -
小竹 直哉, 安孫子 信次, 山口 秀栄, 神田 良照1997 年 34 巻 10 号 p. 759-766
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーThe demand for fine particles is increasing in many industries. Thus, it is important to evaluate and express the fineness of ground products and the progress of fine grinding.
In this work, fine grinding tests were carried out on silica glass using a small laboratory ball mill. The mill used was made of alumina with a diameter of 144mm and an inner length of 130mm. Its volume was about 2.1 liters. The grinding balls were also alumina. The effects of the diameter of the ball, the mass of feed, and the feed size on fine grinding were investigated when the mass of balls and the rotational speed of the mill were constant. The specific surface area and the size distribution of the ground products were measured by the BET adsorption method and the photo extinction method, respectively. The experimental equation was obtained and could be useful to estimate the cumulative undersize from the specific surface area.抄録全体を表示PDF形式でダウンロード (808K) -
須貝 幸廉, 佐藤 宗武, 小林 万希子1997 年 34 巻 10 号 p. 767-772
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーMixing experiments have been carried out to evaluate the mixing characteristics for an agitator-type Mixer using a binary, cohesive, fine powder system with different colors. The temporal variation in the state of mixing with time was measured by an optical method, and the power requirement was simultaneously monitored to estimate the changing flow-pattern with the charge ratio of powders in the vessel.
The influences of the revolution number of the bottom agitator and the chopper on the dispersion state were discussed based on the index of degree of attainment η, defined as a function of the lightness of the mixture, corresponding to the agglomerate size of the color component. It was found that the region of the charge ratio to give effective mixing was estimated by measuring the power requirement. In this region, the mixing rate was almost proportional to the rotational speed of the bottom agitator. The steady state and the final dispersion states of the finer and cohesive component (iron oxide) in the bulk powder (calcium carbonate) were changed by both the speed of the bottom agitator and chopper.
These results suggested that the optimal operating conditions to disperse the objective cohesive powders into the bulk powders depend on the intensity of the mixing and/or dispersion force.抄録全体を表示PDF形式でダウンロード (639K) -
鵜沼 英郎, 加藤 真一, 太田 敏孝, 高橋 実1997 年 34 巻 10 号 p. 773-777
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーA modified homogeneous precipitation technique involving the enzymatic decomposition of urea was proposed and was applied to the synthesis of alumina precursors. Spherical aluminum hydroxide aggregates were prepared at 298K from aqueous solutions containing aluminum sulfate, urea and urease. In contrast to the conventional technique involving the thermally-induced decomposition of urea, the resultant aggregates were amorphous with no trace of pseudoboehmite. The apparent rate of nucleation of the aggregates was found to correlate with the concentration of urease. As the result, the mean size of the aggregates could be controlled in a range between 0.3 to 1.9μm by adjusting the urease concentration. The precursors remained amorphous after calcination at 1073K for 2 hours, then transformed to γ-alumina after being calcined at 1273K, and the transformation to α-alumina was completed after calcination at 1473K.抄録全体を表示PDF形式でダウンロード (3695K) -
綿野 哲, 伊藤 義弘, 鈴木 輝夫, 宮南 啓1997 年 34 巻 10 号 p. 778-784
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーAn electrostatic field detecting system comprised of an electrostatic field sensor, a signal conditioning system, and an air purge unit was newly developed to continuously monitor the electrostatic field strength of charged particles in fluidized bed granulation and drying. The output characteristics of the sensor and the operating characteristics of the system, such as sensitivity and linearity, were tested. The developed system was practically applied to the fluidized bed granulation and drying processes, and the robustness to the operating conditions were examined. The electrostatic field strength during fluidized bed granulation and drying could be continuously and accurately monitored, and the performance of the system was evaluated.抄録全体を表示PDF形式でダウンロード (847K) -
砂田 久一, 長谷川 正樹, 槙野 正, 藤田 完次, 坂本 浩, 谷野 忠嗣, 川口 剛1997 年 34 巻 10 号 p. 785-795
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (1174K) -
早川 修1997 年 34 巻 10 号 p. 805-807
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (349K) -
伊藤 光弘1997 年 34 巻 10 号 p. 808-810
発行日: 1997/10/10
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (1649K)
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