Effect of particle size and grain composition on two-dimensional infiltration process of weathered crust elution-deposited rare earth ores

2020 ◽  
Vol 30 (6) ◽  
pp. 1647-1661
Author(s):  
Zhong-qun GUO ◽  
Yuan-ming LAI ◽  
Jie-fang JIN ◽  
Jian-rong ZHOU ◽  
Kui ZHAO ◽  
...  
2000 ◽  
Vol 15 (9) ◽  
pp. 1922-1935 ◽  
Author(s):  
K. H. Ewald ◽  
U. Anselmi-Tamburini ◽  
Z. A. Munir

The combustion of zirconium in oxygen was simulated using a two-dimensional finite difference model. The model accounts for heat generation by the oxidation reaction and heat loss due to convective and radiative processes. Using geometric considerations along with the heat transfer conditions, the model was utilized to determine the effect of dilution and particle size on the combustion process. Dilution was examined in regular and random geometries and the results showed a marked influence on the nonlinearity of the wave. The effect of particle size was also examined as a function of the geometry of diluent dispersion.


2013 ◽  
Vol 38 (19) ◽  
pp. 7881-7887 ◽  
Author(s):  
Huiping Yuan ◽  
Zhiyuan Zou ◽  
Zhinian Li ◽  
Jianhua Ye ◽  
Xiumei Guo ◽  
...  

Author(s):  
М. С. Сайдумов ◽  
Т. С-А. Муртазаева ◽  
А. Х. Аласханов ◽  
В. А. Байтиев

Технологические и эксплуатационные свойства бетонных и растворных смесей формируются за счет правильного учета в их рецептуре таких показателей, как форма и характер поверхности зёрен, зерновой состав, межзерновая пустотность, водопотребность и предельный размер частиц. Поэтому для проектирования доброкачественного состава необходимо изучить влияние гранулометрического состава мелкого и крупного заполнителей на основные свойства бетонных и растворных смесей. В работе поставлена цель оптимизировать гранулометрический состав заполнителей. Работа выполнена в рамках исследований по реализации научного проекта № 18-48-200001 «Высококачественные бетоны с повышенными эксплуатационными свойствами на основе местного природного и техногенного сырья», получившего поддержку Российского фонда фундаменталь- ных исследований» (РФФИ). The technological and operational properties of concrete and mortar mixtures are formed due to the correct consideration in their formulation of indicators such as the shape and nature of the surface of the grains, grain composition, intergranularvoidness, water demand and maximum particle size. Therefore, to design a benign composition, it is necessary to study the effect of particle size distribution of small and large aggregates on the basic properties of concrete and mortar mixtures. The goal is to optimize the particle size distribution of aggregates. The work was implemented as part of research on the fulfillment of scientific project No. 18-48-200001 “High-quality concrete with enhanced performance properties based on local natural and secondary raw materials,” which received support from the Russian Foundation for Fundamental Research (RFFR).


2017 ◽  
Vol 5 (47) ◽  
pp. 12409-12421 ◽  
Author(s):  
Agustín A. Godoy ◽  
Germán E. Gomez ◽  
Anna M. Kaczmarek ◽  
Rik Van Deun ◽  
Octavio J. Furlong ◽  
...  

A new family of luminescent 2D coordination networks: energy pathways for sensitization mechanisms and chemical–physical sensing features.


ACS Omega ◽  
2019 ◽  
Vol 4 (6) ◽  
pp. 9813-9822 ◽  
Author(s):  
Zheng Ruan ◽  
Mei Li ◽  
Kai Gao ◽  
Dongliang Zhang ◽  
Lan Huang ◽  
...  

Wear ◽  
2020 ◽  
pp. 203579
Author(s):  
G. Haider ◽  
M. Othayq ◽  
J. Zhang ◽  
R.E. Vieira ◽  
S.A. Shirazi

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