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Volume 33, Issue 6
Displaying 1-13 of 13 articles from this issue
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Masayuki HORIO1996 Volume 33 Issue 6 Pages 455
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
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Eiji OBATA, Masato MARUYAMA, Yuichi OHIRA, Makoto AKIYOSHI, Koji ANDO1996 Volume 33 Issue 6 Pages 456-461
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSParticle sizes and their distribution in a fluidized crystallizer can be determined by measuring the superficial velocity and pressure drops across the beds of various heights in fluidized beds.
The growth behavior of sodium chloride crystals in a fluidized crystallizer was investigated from crystal size distributions in a three-hour cystallization. The Ergun equation for pressure drop of packed beds in the transition flow region applied to the crystal size distributions was in good agreement with the size distributions obtained by a microscope method.View full abstractDownload PDF (2207K) -
Narimichi TAKEI, Kiyoshi NISHIYAMA, Kazunori MIYATA, Hiroshi SAITO1996 Volume 33 Issue 6 Pages 462-467
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe mechanism for the granulation and coating with a rotary disk and an agitator equipped in a fluidized-bed granulator was examined. With this granulator, the two rotating revolvers give a densely agglomerated product. Which is considered to result from their large shear stress. No growth of coarse particles occurred during granulation and coating when the two revolvers inversely rotate; fine particles were not produced under the above mentioned operating condition. In the present study, an image analyzer was used to measure the particle size distribution of the agglomerates. The image analyzer was useful for the precise observation of particle growth with the lapse of time.View full abstractDownload PDF (578K) -
Katsutoshi NARUSE, Nobutaka KASHIMA, Shugo HOSODA, Seiichiro TOYODA, T ...1996 Volume 33 Issue 6 Pages 468-475
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSIn many applications of fluidization, it is important to quantitatively analyze solid circulation behavior in order to design fluidized bed reactors. In this study, pressure drop equations for a Newtonian fluid was applied to solid circulating flow across a tube bank, and a new method of measuring the apparent bed viscosity with a simple rotating bar was developed. The measurement of fluidized bed viscosity was done in a bed of silica sand(dp=0.582mm and 0.150mm) in the ambient condition.
It was found that the obtained viscosity enables prediction of the circulation rate of solids in fluidized beds with a tube bank, such as the Internally Circulating Fluidized Bed Boiler.View full abstractDownload PDF (811K) -
Hiroyuki TSUJIMOTO, Toyokazu YOKOYAMA1996 Volume 33 Issue 6 Pages 476-480
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
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Hisakazu SUNADA, Masaki HASEGAWA, Tadashi MAKINO, Kanji FUJITA, Hirosh ...1996 Volume 33 Issue 6 Pages 481-486
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
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Sadashi TANIGUCHI, Masahiko NAKAMURA, Takashi KONISHI, Toshiaki HIGUCH ...1996 Volume 33 Issue 6 Pages 487-499
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWith the use of a newly developed air-type surface treatment and blending system, milk casein particles were surface-treated, blended and matured with titanium oxide. The physical properties such as whiteness, compression strenght and dyeability of the resulting product were carefully evaluated from the point of view of future practical applications as a fibrous composite material. It was found that the new treatment/blending system could solve the problem of the thermal deterioration of milk casein which was caused by the sliding heat generated during blending and the heat generated during maturing in a container in a conventional mechanical treatment/blending system. Intimate treatment and blending with titanium oxide could produce fine tissures with a 4.4% or so rise in compressive yield strenght. In this way, a reliable manufacturing method was established in order to produce high-performance fibrous composite material from milk casein and a correlation was obtained between the process conditions, on one hand and the varying properties of treated powder and resulting material, on the other.
Furthermore, a simulation of particle behavior in the air blending field was analyzed to compare with and study the blending behavior of the actual system through high-speed image processing as well as fluorescent X-ray analysis. It was confirmed that the simulation analysis results and the actual behavior study results match each other well. This study will help in the application of simulation microanalysis to material and system design.View full abstractDownload PDF (8321K) -
Atsuya TOWATA, Akira TSUGE, Mutsuo SANDO1996 Volume 33 Issue 6 Pages 500-504
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA composite particle of ultra fine titanium nitride particles and carbon black fine particles was prepared by reductive nitrification in N2 from titania ultra fine particles coated on carbon black fine particles. The nitrification temperature of the titania was lower than that of titania mechanically mixed with carbon black powder. As the amount of titania coated on the carbon black particles was larger, the size of the nitrified particles on the carbon black particle became larger and the remaining titanium oxide increased. The size of the titanium nitride particles varied with the content of ZrO2 in the titania coating on the carbon black particles.View full abstractDownload PDF (4571K) -
Tohru MORIWAKI1996 Volume 33 Issue 6 Pages 505-509
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSAfter an analysis of power transmission and a comparison of the published pulverization data with estimated power, the following problems were confirmed, unrelated to the coincidentallity of direction between revolution and rotation.
1) The theoretical power necessary for pulverization in planetary mills is determined as the product of the frictional force owing to planetary motion μmaN and rp(ω1+ω2) in place of the velocity of pot, in the same manner as coventional ball mills.
2) Under even conditions the pulverizing rate is proportional to the theoretical power for pulverization, no matter whether the mill pot revolves or not.View full abstractDownload PDF (458K) -
Munetake SATOH, Tomohiro IWASAKI, Kei MIYANAMI1996 Volume 33 Issue 6 Pages 510-515
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSA rotary-intrusion-type of rheometer with a conical rotor has been improved to detect the intruding stress as well as the shearing torque at the cell bottom. The characteristic curves of the shearing torque versus the depth of intrusion of the rotor in the powder bed and the normal stress versus the depth of intrusion have been measured simultaneously under various operating conditions. Two experimental coefficients C and m were introduced to characterize the relationship between the shearing torque and the depth of intrusion. The coefficient m indicates the compressibility tendency of the powder bed during intrusion of the rotor. The friction property of powders has been discussed based on the coefficient C measured at m=1 (without the compressive condition).View full abstractDownload PDF (658K) -
Mitsuhiro ITO1996 Volume 33 Issue 6 Pages 516-518
Published: June 10, 1996
Released on J-STAGE: April 30, 2010
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1996 Volume 33 Issue 6 Pages 536a
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1168K) -
1996 Volume 33 Issue 6 Pages 536b
Published: 1996
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (1168K)
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