Effects of flow rate, slurry solid content, and feed size distribution on rod mill efficiency

2015 ◽  
Vol 34 (5) ◽  
pp. 533-539 ◽  
Author(s):  
Sina Ghassa ◽  
Mahdi Gharabaghi ◽  
Amir Reza Azadmehr ◽  
Mehdi Nasrabadi
Keyword(s):  
Size Distribution ◽  
Flow Rate ◽  
Solid Content ◽  
Mill Efficiency

scholarly journals Encapsulation of Menthol in Beeswax by a Supercritical Fluid Technique

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Linjing Zhu ◽  
Hongqiao Lan ◽  
Bingjing He ◽  
Wei Hong ◽  
Jun Li
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Flow Rate ◽  
Saturated Solution ◽  
Narrow Particle Size Distribution ◽  
Solution Flow Rate ◽  
Process Conditions ◽  
Solution Flow ◽  
Expansion Temperature

Encapsulation of menthol in beeswax was prepared by a modified particles from gas-saturated solutions (PGSS) process with controlling the gas-saturated solution flow rate. Menthol/beeswax particles with size in the range of 2–50 μm were produced. The effects of the process conditions, namely, the pre-expansion pressure, pre-expansion temperature, gas-saturated solution flow rate, and menthol composition, on the particle size, particle size distribution, and menthol encapsulation rate were investigated. Results indicated that in the range of studied conditions, increase of the pressure, decrease of the gas-saturated solution flow rate, and decrease of the menthol mass fraction can decrease the particle size and narrow particle size distribution of the produced menthol/beeswax microparticles. An N2-blowing method was proposed to measure the menthol release from the menthol/beeswax microparticles. Results showed that the microparticles have obvious protection of menthol from its volatilization loss.

Study on interaction effects between the hydrocyclone feed flow rate and the feed size distribution

2020 ◽  
Vol 366 ◽  
pp. 617-628 ◽  
Author(s):  
Baoyu Cui ◽  
Caie Zhang ◽  
Qiang Zhao ◽  
Duanxu Hou ◽  
Dezhou Wei ◽  
...  
Keyword(s):  
Size Distribution ◽  
Flow Rate ◽  
Interaction Effects ◽  
Feed Flow Rate

scholarly journals Preparation of suspensions of phospholipid-coated microbubbles by coaxial electrohydrodynamic atomization

2008 ◽  
Vol 6 (32) ◽  
pp. 271-277 ◽  
Author(s):  
U Farook ◽  
E Stride ◽  
M.J Edirisinghe
Keyword(s):  
Size Distribution ◽  
Flow Rate ◽  
Air Flow ◽  
Bubble Diameter ◽  
Mechanical Agitation ◽  
Preparation Methods ◽  
Scaling Equation ◽  
Human Body Temperature ◽  
The Mean ◽  
The Ideal

The use of phospholipid-coated microbubbles for medical applications is gaining considerable attention. However, the preparation of lipid-coated microbubble suspensions containing the ideal size and size distribution of bubbles still represents a considerable challenge. The most commonly used preparation methods of sonication and mechanical agitation result in the generation of polydisperse microbubbles with diameters ranging from less than 1 μm to greater than 50 μm. Efforts have been made via distinctly different techniques such as microfluidic and electrohydrodynamic bubbling to prepare lipid-coated microbubbles with diameters less than 10 μm and with a narrow size distribution, and recent results have been highly promising. In this paper, we describe a detailed investigation of the latter method that essentially combines liquid and air flow, and an applied electric field to generate microbubbles. A parametric plot was constructed between the air flow rate ( Q g ) and the lipid suspension flow rate ( Q l ) to identify suitable flow rate regimes for the preparation of phospholipid-coated microbubbles with a mean diameter of 6.6 μm and a standard deviation of 2.5 μm. The parametric plot has also helped in developing a scaling equation between the bubble diameter and the ratio Q g / Q l . At ambient temperature (22°C), these bubbles were very stable with their size remaining almost unchanged for 160 min. The influence of higher temperatures such as the human body temperature (37°C) on the size and stability of the microbubbles was also explored. It was found that the mean bubble diameter fell rapidly to begin with but then stabilized at 1–2 μm after 20 min.

scholarly journals Study on Spray Evaporation Treatment of Desulfurization Wastewater

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 418
Author(s):  
Huiqian Guo ◽  
Jing Wang ◽  
Jiangbo Wu ◽  
Xiaoze Du
Keyword(s):  
Size Distribution ◽  
Air Temperature ◽  
Flow Rate ◽  
Flue Gas ◽  
Evaporation Rate ◽  
Droplet Size Distribution ◽  
Compressed Air ◽  
Impact Factors ◽  
Spray Nozzle ◽  
Desulfurization Wastewater

Limestone-gypsum wet flue gas desulfurization (WFGD) often produces a certain amount of wastewater with complex water quality and heavy metal pollution which should be treated properly before release. Spaying the desulfurization wastewater into flue duct and using exhausted flue gas heat for evaporation is a promising and economical technology for achieving zero wastewater discharge in thermal power plant. To enable a more in-depth understanding on evaporation of FGD wastewater spray, a visual wind tunnel test rig based on the atomized droplet laser measuring system was built to reveal the impact factors on droplet thermal-fluid behavior. The dominant impact factors such as compressed air pressure and flow rate in air-blast spray nozzle, hot air temperature and velocity in the evaporation tunnel were analyzed to discuss the droplet size distribution and evaporation performance through alternating operate condition. A discrete mathematical model that combines both Eulerian and Lagrangian framework was established to validate the experiment result. It is concluded that introducing high pressure compressed air into the nozzle can contribute to the dispersion of droplets and enhance the evaporation rate. Proper flow rate in spray nozzle is required to avoid incomplete droplets evaporation. Air temperature and velocity in the evaporation tunnel apply positive impact on droplet size distribution and evaporation performance. Numerical simulation results of both dominant factors impact on evaporation behavior and total evaporation rate showed consistency with the experimental outcome.

Preparing Monodispersed Hydrogel Microspheres and Microcapsules

1998 ◽  
Vol 550 ◽  
Author(s):  
Y. Senuma ◽  
Ch. Lowe ◽  
Y. Zweifel ◽  
J. G. Hilborn ◽  
I. Marison
Keyword(s):  
Size Distribution ◽  
Droplet Size ◽  
Flow Rate ◽  
Large Scale ◽  
Alginate Beads ◽  
Model System ◽  
Drop Formation ◽  
Narrow Size Distribution ◽  
Spinning Disk ◽  
High Degree

AbstractOur spinning disk atomization (SDA) can, relative to other existing techniques, produce micronsized particles of very narrow size distribution. The aim of this work is to present this technology for the production of alginate microspheres. We have atomized and gelled aqueous alginate solutions into very narrowly dispersed microspheres with sizes ranging from 300 to 600 μm. Here the interest is to design particles of a given size with a narrow size distribution and to show a new method of encapsulation using the SDA. The viscosity and flow rate contributions in the drop formation is qualitatively analyzed to show how it affects the droplet size. In addition, a technique for high degree of encapsulation will be presented. As an example, yeast has been used as a model system. The production of yeast loaded microspheres will show the potential of the technique for biotechnology applications. Such alginate beads could potentially serve as carriers for acitive substances or cells in large scale bioreactors.

scholarly journals Conducting Membranes and Coatings made from Redispersable Nanoscaled Crystalline SnO2:Sb Particles

1998 ◽  
Vol 520 ◽  
Author(s):  
C. Goebbert ◽  
M. A. Aegerter ◽  
D. Burgard ◽  
R. Nass ◽  
H. Schmidt
Keyword(s):  
Thermal Treatment ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Sol Gel ◽  
Total Porosity ◽  
Solid Content ◽  
Visible Range ◽  
Inorganic Membranes ◽  
Separation Processes

ABSTRACTInorganic membranes prepared by the sol gel method are promising candidates for use as filters in separation processes. Conducting supported membranes and coatings have been produced from redispersable nanoscaled crystalline Sb-doped SnO2 powders with a Sb content up to 5 mole % (with respect to Sn). The crystalline particles are monosized (≅4 nm) and fully redispersable in aqueous solution at pH ≥ 8 with a solid content up to 70 wt. %. By thermal treatment at different temperatures and times, the pore size diameter of the material can be adjusted from 4 to 20 nm with a very narrow pore size distribution (∼ ±1 nm) and a total porosity of 63 %, practically independent of the sintering parameters. Uniaxial pressed substrates present similar characteristics with however larger pore size distribution (±5 nm) and 80 % total porosity. Their resistance decreases with sintering temperature and time down to 4 Ω (800 °C 8 h). Fully dispersed aqueous solutions of the powder (25 wt. %) were used to prepare transparent conducting coatings on glass or ceramics by spin-coating. After thermal treatment (1 hour at 550 °C) single layers 200 nm thick exhibited a typical specific electrical resistance ρ = 2.5·10−2 ωcm with transmission in the visible range measured against air of 90%.

Size Distribution of Indoor Airborne Particulates Collected by a Low-Flow Rate Cascade Impactor

1999 ◽  
Vol 8 (6) ◽  
pp. 361-369 ◽  
Author(s):  
Tomohiko Sugiyama ◽  
Takashi Amagai ◽  
Hidetsuru Matsushita ◽  
Mitsuyuki Soma
Keyword(s):  
Size Distribution ◽  
Flow Rate ◽  
Cascade Impactor ◽  
Low Flow ◽  
Airborne Particulates ◽  
Low Flow Rate

scholarly journals PRODUKSI TANAMAN KARET (Hevea brasiliensis) PADA WAKTU PENGUMPULAN LATEKS YANG BERBEDA

2019 ◽  
Vol 3 (1) ◽  
pp. 27-34
Author(s):  
Mochlisin Andriyanto ◽  
Andi Wijaya ◽  
Junaidi . ◽  
Arief Rachmawan
Keyword(s):  
Flow Rate ◽  
Hevea Brasiliensis ◽  
Block Design ◽  
Rubber Particle ◽  
Rubber Tree ◽  
Total Solid ◽  
Solid Content ◽  
Total Solid Content ◽  
Randomized Block Design ◽  
Collection Period

Latex is a colloidal suspended of rubber particle in rubber tree (Hevea brasiliensis). Technically, the capacity of rubber productivity can be determined by latex collectionperiod after being tapped. The objective of research was to obtain the differences of latex collection period. The study was conducted in September-November 2017 at the Sungei Putih Research Center in Experimental Estate with PB 260 (7 years tapped) on BO-2 (S/2 d3.ET2.5% Ga1.0 6/y(m)).The experimental designused a Randomized Block Design (RBD) with four treatments of latex collection periodi.e 20, 40, 60, 80 minutes after being tapped with three replicates respectively. The parameters observed was gram/tree/tapping (g/p/s), kg/ha/years, latex flow rate (ml/minutes) and total solid content (%).The results showed that latex collection period was significantly different to g/p/s, kg/ha/years and latex flow rate. Total solid content (TSC) was not significantlydifferent in all treatments. The latex collection period of 20 minutes after being tapped had higher productivity than 40, 60, 80 minutes.

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