A5103269366- Granular flow and fluidized beds
- Landslides and related hazards
- Recycling and Waste Management Techniques
- Recycling and utilization of industrial and municipal waste in materials production
- Toxic Organic Pollutants Impact
- Advanced materials and composites
- Environmental remediation with nanomaterials
- Heavy metals in environment
- Coal and Its By-products
- Geotechnical and Geomechanical Engineering
- Advanced ceramic materials synthesis
- Geotechnical Engineering and Soil Mechanics
- Mercury impact and mitigation studies
- Odor and Emission Control Technologies
- Aluminum Alloys Composites Properties
- Adsorption and biosorption for pollutant removal
- Advanced Algorithms and Applications
- Thermal and Kinetic Analysis
- Planetary Science and Exploration
- Extraction and Separation Processes
- Mineral Processing and Grinding
- Soil and Unsaturated Flow
- Industrial Gas Emission Control
- Arsenic contamination and mitigation
- Glass properties and applications
Central South University
2009-2024
Ministry of Ecology and Environment
2010-2020
Shandong Institute of Metrology
2018
Institute of Physics, Academia Sinica
2016
Chinese Academy of Tropical Agricultural Sciences
2013
Chinese Academy of Sciences
2005-2013
Luye Pharma (Switzerland)
2013
China Guodian Corporation (China)
2013
State Key Laboratory of Clean Energy Utilization
2010-2012
Ministry of Commerce of the People's Republic of China
2012
The impact of a sphere with velocity u0 on fine, loose granular system under the acceleration due to gravity has been studied by fast video photography. behavior bed is found be similar fluid during initial impact, followed cavity drag projectile penetration. From trajectory it that can well described adding bulk frictional force f hydrostatic kappa(z) where kappa constant and z denotes penetration depth. Both are dependent. This form suggests fluidlike viscous dissipations in neglected...
A kinetic model is proposed for simulating the trajectory of a single milling ball in planetary mill, and also local energy transfer during process under no-slip conditions. Based on kinematics motion, collision frequency power are described, normal impact forces effective derived from analyses geometry. The Hertzian theory applied to formulate these models after having established some relationships among geometric, dynamic, thermophysical parameters. Simulation carried out based two...
The Brazil nut effect is a key issue impeding the uniform distribution of particles in mixed granular system. Extensive research was conducted on this segregation phenomenon 1990s and 2000s to identify mechanisms influencing factors involved. However, due limitations experimental techniques, scope effectiveness have been restricted. In study, Hall-effect magnetic sensing technique utilized track motion single sphere (referred as intruder) within cubic bed. This tracking method allowed for...
Depth dependence of vertical plunging force in granular medium is studied experimentally by measuring the slow-pushing different size and shape objects intruding vertically into a bed. It found that all curves fully immersed intruders have concave-to-convex transition. The depth turns from supralinear to sublinear. By studying properties inflection point concave-convex transition, we find at proportional intruder's volume, occurs when intruder buried level around twice its diameter. Testing...
Dynamics of a projectile impacting on loose granular bed under the acceleration due to gravity g has been studied by fast video photograph. Granular jet formation and penetration are observed in 3D quasi-2D experiments. It is found that velocity u can be described m du/dt=−γu−kz+mg′, where ³ k parameters which characterize viscous damping hydrostatic drag forces bed, respectively, z distance projectile, g′ modified term. The term important For 3D, only at beginning impact, neglected during...
Granular solid hydrodynamics (GSH) is a broad-ranged continual mechanical description of granular media capable accounting for static stress distributions, yield phenomena, propagation and damping elastic waves, the critical state, shear band, fast dense flow. An important input GSH an expression energy needed to deform grains. The original expression, though useful simple, has some drawbacks. Therefore slightly more complicated proposed here that eliminates three them: (1) maximal angle at...
In this paper, we have designed and employed a suspended-wall silo to remove Janssen effect in order explore directly the local pressure dependence of Granular Orifice Flow (GOF) systematically. We find that as is removed, flow rate Q changes linearly with external pressure. The slope {\alpha} linear change decays exponentially ratio size orifice {\Phi}/D, which suggests existence characteristic {\lambda} (~2.4). When {\Phi}/D > {\lambda}, gradually zero, on GOF becomes negligible, where...
Over the past decades in China, number of medical waste incinerators (MWIs) has been rising rapidly, causing emissions polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). In this study, samples fly ash, ash deposits, bottom from typical MWIs were analyzed for PCDD/Fs their distribution characteristics. Results showed international toxic equivalent (I-TEQ) values range 6.9–67 ng I-TEQ/g whereas concentration was extremely low (only 1.33 pg I-TEQ/g), yet generation mostly de novo...
The aim of this study was to evaluate the behavior Hg, As, and Se in cement production. Two types plants were studied, including vertical shaft kiln (VSK) preheater–precalciner (PPK) processes. Determination main material gas streams performed. It found that recycling particulate matter captured by an air pollution control device caused a significant enrichment Hg As inside both total quantity entering process emitted atmosphere be 10–109 6.3–38 mg, respectively, per ton clinker produced....
In this study, the composition and physicochemical properties of fly ash, air preheater deposits, bottom ash from a typical medical waste incinerator (MWI) were analyzed. The MWI unit studied consists rotary pyrolyser, followed by vertical cylindrical combustor, featuring an extractor grate above which granular material is fluidized. Fly consisted mainly Ca, Al, Si, Mg, Na, O, C, Cl, S; chlorine content in was higher than that generated municipal solid (MSWI). Bottom CaCO 3 , SiO 2 Ca(OH)...