巻号一覧
前身誌
18 巻, 7 号
選択された号の論文の7件中1～7を表示しています
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狩野 武, 伊東 勝之1981 年 18 巻 7 号 p. 476-483
発行日: 1981/07/10
公開日: 2010/04/30
ジャーナル フリーIt is desirable to choose economic and heat-resisting filter media as collectors of fine dust contained in high temperature gases, such as the exhaust gases from metallurgical or ceramic industries.
This paper deals with fundamental studies of the pressure drop and the filtration efficiency of a sand-bed filter as a collector of fine dust. In the experiment conducted at room temperature, four kinds of sand with different particle diameters are used as filter media, and calcium carbonate is used as a sample dust.
The result of experiments shows that the sand-bed filter has satisfactory filtration efficiency and comparatively low pressure drop of air flow, those are requisite properties of a fine dust filter.抄録全体を表示PDF形式でダウンロード (982K) -
竹下 武成, 狩野 武, 渡辺 始, 山本 哲也, 依岡 学1981 年 18 巻 7 号 p. 484-491
発行日: 1981/07/10
公開日: 2010/04/30
ジャーナル フリーThis paper deals with a study of flow characteristics and the velocity distribution of granular materials in an inclined open channel.
In the experiments, glass beads and sesame seeds have been used as the sample of granular materials. The velocity profile of the materials at the open surface, the lateral sides and also the bottom of the channel are clarified, and the relationship between the shear strees and shear rate of the flow characteristics are theoretically analyzed.
As the conclusion of this study, it may be considered that the flow pattern of granular materials in a rectangular channel shows characteristics of a pseudo-plastic fluid.抄録全体を表示PDF形式でダウンロード (823K) -
堀 仁貞, 山田 康雄, 牟田 典四郎, 加藤 博雄1981 年 18 巻 7 号 p. 491-498
発行日: 1981/07/10
公開日: 2010/04/30
ジャーナル フリーBoth fine and coarse particles were produced during a shot of glass beads. The fracture behavior of the coarse particles was investigated by using the beads which have a size range of from 1.41 to 1.68mm.
The beads were projected at various speeds in a shot life tester, and fractured beads were classified into fine and coarse particle groups with two standard screens of 1.41 and 0.59mm. The coarse particles were reprojected until they became fine particles less than 0.59mm in diamter. Measuring of the whole weight and a particle size distribution of the coarse particles was made at each projection.
The obtained results were as follows:
1) Some of beads were not fractured though beads were subjected to a number of projections, however, after an onset of fracture these numbers of proiections did not affect the fracture behavior of the coarse particles.
2) Relationship between a residue weight of the coarse particles and the projection number was given by a straight line on the Weibll's chart.
3) The ratio of the residue weight to the whole weight of the coarse particles and crushed weight were expressed as a function of the projection number.抄録全体を表示PDF形式でダウンロード (788K) -
立山 博, 陣内 和彦, 木村 邦夫, 恒松 絹江1981 年 18 巻 7 号 p. 498-506
発行日: 1981/07/10
公開日: 2010/04/30
ジャーナル フリーAn experimental study has been made to obtain the compressive strength and Martens scratching hardness of quartz, alkali feldspar and plagioclase particles. These minerals were sorted from weathered granite according to the weathering degree. The compressive strength and hardness of weathered plagioclase particles showed a prominent decrease due to argillization against the unweathered ones as compared with the other two minerals. The different behaviour of the compressive strength and hardness of each mineral suggests that the abrasive grinding mechanism may be more effective than compressive one for differential grinding.
Laboratory scale mill tests were carried out with the samples of weathered granite by using pot mill, jet mill and hammer mill. The results of the differential grinding show that pot mill was more effective than jet and hammer mills in the amount of grinding for plagioclase particles.抄録全体を表示PDF形式でダウンロード (964K) -
森山 龍一, 早野 延男, 上滝 具貞1981 年 18 巻 7 号 p. 507-512
発行日: 1981/07/10
公開日: 2010/04/30
ジャーナル フリーThis paper deals with the filling conditions which influence vertical bottom pressure distribuion. The bottom pressure differs extremely, dependent on where a certain bulk solid is fed, i. e. either center-feed or perimeter-feed. In order to study the reasons for this, the authors measured the air pressure drop for the filling bed, and calculated the porosity.
From the results, it is found that:
1) In the case of center-feed, the porosity in the bed increses more than that of perimeter-feed.
2) The porosity of the higher prssure section on the bottom increases more than of the lower pressure section.
For these reasons, it is explained that the porosity is closely related to strength of arching generated by frictional phenomena in the bed.抄録全体を表示PDF形式でダウンロード (674K) -
野中 道郎1981 年 18 巻 7 号 p. 513-523
発行日: 1981/07/10
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (1164K) -
笠原 三紀夫, 高橋 幹二1981 年 18 巻 7 号 p. 524-530
発行日: 1981/07/10
公開日: 2010/04/30
ジャーナル フリーPDF形式でダウンロード (2285K)
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