Effect of high-speed shear flocculation on the flotation kinetics of ultrafine microcrystalline graphite

2021 ◽  
Author(s):  
Chao Ni ◽  
Qingshan Zhang ◽  
Mingguo Jin ◽  
Guangyuan Xie ◽  
Yaoli Peng ◽  
...  
Keyword(s):  
High Speed ◽  
Flotation Kinetics ◽  
Kinetics Of

Study on the Formaldehyde Adsorption Kinetics of Dry Waters

2014 ◽  
Vol 809-810 ◽  
pp. 907-911
Author(s):  
Jun Long Wang ◽  
Jie Hou ◽  
Ting Jiang ◽  
Yong Jun He ◽  
Yao Dong Liang
Keyword(s):  
Adsorption Kinetics ◽  
High Speed ◽  
Adsorption Process ◽  
Average Diameter ◽  
Adsorption Rate ◽  
Absorption Kinetics ◽  
Order Model ◽  
Pseudo Second Order ◽  
Kinetics Of ◽  
Formaldehyde Adsorption

Dry waters with an average diameter of 82 μm were prepared by a high speed mixed route. The formaldehyde absorption kinetics of dry waters was investigated by simulating indoor formaldehyde pollution in glass chamber. The results showed that pseudo-second order model could be used to simulate the adsorption process; the adsorption rate was highest in the initial 60 minutes; when the adsorption lasted for 180 minutes, the adsorption reached equilibrium.

scholarly journals Influence of microadditive of carbon dioxide on the kinetics of boiling-up of superheated w-pentane

2021 ◽  
Vol 2039 (1) ◽  
pp. 012027
Author(s):  
S A Perminov ◽  
E V Lipnyagov ◽  
M A Parshakova
Keyword(s):  
High Speed ◽  
Gas Adsorption ◽  
Glass Tube ◽  
Initial Value ◽  
Active Centers ◽  
High Speed Video ◽  
Inner Surface ◽  
Vertical Glass ◽  
Attainable Superheat ◽  
Kinetics Of

Abstract The effect of a low-boiling impurity (CO2 gas <1.5% mol) on the kinetics of boiling-up of superheated n-pentane in a vertical glass tube have been studied by high-speed video (2050 fps). The method of continuous pressure decrease from 2.00 to 0.10 MPa (in the temperature range of 100.2-145.1 °C), as well as the method of measuring the lifetimes of superheated liquids at 0.10 MPa (90.2-134.1 °C) have been used. The inner surface of the tube has two visible defects, one of which defines the boundary of the attainable superheat. After degassing the system, the defects of tube cease to play an appreciable role, the active centers are redistributed. The temperature of the attainable superheat increases from the initial value by 20 °C in tests with gas and by 10 °C in subsequent tests without it. The result obtained may be related to physical gas adsorption on the glass surface during the process of evacuation of the system.

The Effects of Pretreatment on the Flotation Kinetics of Waste Coal

2012 ◽  
Vol 32 (3) ◽  
pp. 130-142 ◽  
Author(s):  
Jovica M. Sokolović ◽  
Rodoljub D. Stanojlović ◽  
Zoran S. Marković
Keyword(s):  
Flotation Kinetics ◽  
Kinetics Of ◽  
Waste Coal

Kinetics of fracture of nodular cast iron by the method of high-speed photography

1977 ◽  
Vol 9 (12) ◽  
pp. 1462-1467
Author(s):  
I. S. Guz' ◽  
A. P. Lyubchenko ◽  
V. M. Matsevityi ◽  
S. L. Molodtsov ◽  
L. A. Smirnova
Keyword(s):  
Cast Iron ◽  
High Speed ◽  
Nodular Cast Iron ◽  
High Speed Photography ◽  
Kinetics Of

scholarly journals Effect of Jump Direction on Joint Kinetics of Take-Off Legs in Double-Leg Rebound Jumps

Sports ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 183
Author(s):  
Yasushi Kariyama
Keyword(s):  
High Speed ◽  
Sagittal Plane ◽  
Video Camera ◽  
Positive Power ◽  
Negative Power ◽  
Joint Kinetics ◽  
High Speed Video Camera ◽  
Japanese Male ◽  
Direction Control ◽  
Kinetics Of

Vertical (VDJ) and horizontal (HDJ) double-leg rebound jumps are used as plyometric exercises in direction-specific training regimens for various sports. We investigated the effects of jump direction on joint kinetics of the take-off legs in double-leg rebound jumps. Twelve Japanese male track and field athletes performed VDJ, 100% HDJ, 50% HDJ (50% of 100% HDJ distance), and 75% HDJ (75% of 100% HDJ distance). Kinematic and kinetic data in the sagittal plane were calculated using a force platform and high-speed video camera. Hip negative power during the eccentric phase decreased from VDJ to 50% HDJ (VDJ, −4.40 ± 4.25 W/kg; 50% HDJ, −0.83 ± 2.10; 75% HDJ, −0.33 ± 0.83; 100% HDJ, 0 ± 0), while hip positive power increased from VDJ to 100% HDJ (VDJ, 4.19 ± 2.73 W/kg; 50% HDJ, 9.37 ± 2.89; 75% HDJ, 11.15 ± 3.91; 100% HDJ, 18.51 ± 9.83). Knee negative power increased from VDJ to 75% HDJ (VDJ, −14.48 ± 7.67 W/kg; 50% HDJ, −18.98 ± 7.13; 75% HDJ, −21.57 ± 8.54; 100% HDJ, −23.34 ± 12.13), while knee positive power decreased from VDJ to 75% HDJ (VDJ, 23.18 ± 9.01 W/kg; 50% HDJ, 18.83 ± 5.49; 75% HDJ, 18.10 ± 5.77; 100% HDJ, 16.27 ± 6.22). Ankle joint kinetics remained unchanged. Differences in hip and knee joint kinetics between VDJ and HDJ were associated with direction control, becoming more pronounced as jump distance increased.

scholarly journals A New Transmission Theory of “Global Dynamic Wrap Angle” for Friction Hoist Combining Suspended and Wrapped Wire Rope

2020 ◽  
Vol 10 (4) ◽  
pp. 1305
Author(s):  
Yongbo Guo ◽  
Dekun Zhang ◽  
Xinyue Zhang ◽  
Dagang Wang ◽  
Songquan Wang
Keyword(s):  
Field Experiment ◽  
Boundary Point ◽  
High Speed ◽  
Wire Rope ◽  
Mechanical State ◽  
Heavy Load ◽  
Global Dynamic ◽  
Wrap Angle ◽  
Mine Hoist ◽  
Kinetics Of

A new transmission theory of “global dynamic wrap angle” for friction hoist is proposed. The theory is based on a mine hoist simulation model which combines the suspended rope with the wrapped rope. Rope dynamics in a suspended section are verified by the field experiment results. The theory holds that the mechanical state of wire rope is dynamic through the whole wrap angle, including deformation, contact and friction. When the rope enters the wrap angle, it provides positive friction and changes direction at a certain boundary point. The demarcation of the boundary depends on the rope load on both sides of the friction pulley. The theory is suitable for accurately analyzing the kinetics of high-speed and heavy-load friction hoisting.

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