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Volume 30, Issue 10
Displaying 1-7 of 7 articles from this issue
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Nobuharu TERACHI, Jusuke HIDAKA, Sigeo MIWA1993 Volume 30 Issue 10 Pages 690-694
Published: October 10, 1993
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSMaking 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.View full abstractDownload PDF (422K) -
Nobuyoshi ASAI, Osamu YAMAMOTO, Tetsuhisa MAKINO, Takeshi FURUKAWA, Mi ...1993 Volume 30 Issue 10 Pages 695-702
Published: October 10, 1993
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThis 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.View full abstractDownload PDF (2139K) -
Hiroaki MASUDA, Kuniaki GOTOH1993 Volume 30 Issue 10 Pages 703-708
Published: October 10, 1993
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSSeveral 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.View full abstractDownload PDF (764K) -
Won-Deok YI, Masashi IWATA, Masaaki NAKAMURA, Sigeki TOYAMA1993 Volume 30 Issue 10 Pages 709-712
Published: October 10, 1993
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (380K) -
Hiroaki MASUDA, Shuji MATSUSAKA1993 Volume 30 Issue 10 Pages 713-716
Published: October 10, 1993
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (388K) -
Takuo TAKESHITA1993 Volume 30 Issue 10 Pages 717-727
Published: October 10, 1993
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (7615K) -
Hisashi KAGA1993 Volume 30 Issue 10 Pages 736-738
Published: October 10, 1993
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (410K)
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