相关参考文献
注意：仅列出部分参考文献，下载原文获取全部文献信息。
Article
Energy & Fuels
Gaochao Pan et al.
Summary: Understanding the motion of coal slime around the trailing vortex is crucial for predicting the probability of bubble entrainment in coal flotation. This study used a PIV system to investigate the length of the low-velocity region and the separation behavior of liquid from the cylinder surface at different fluid flow velocities. The results showed that the height of the low-velocity region initially increased and then decreased, while the separation angle rapidly decreased and then stabilized at 94.2 degrees as the fluid flow velocity increased. The trajectory of coal particles around the cylinder was also observed, showing that the particles moved against the cylinder surface before entering the trailing vortex region, where they gained sufficient energy from centrifugal force and dynamic pressure.
Article
Mining & Mineral Processing
Yongxing Zheng et al.
Summary: This study investigated the effects of potassium ferrate (PF) on the flotation performances of chalcopyrite and galena. The results showed that PF significantly depressed galena while having little effects on chalcopyrite. Zeta potential tests revealed that PF induced the formation of hydrophilic species on galena surface. Chemical adsorption of industrial grade O-isopropyl-N-ethyl thionocarbamate (IPETC) was observed on PF-treated chalcopyrite and galena surfaces. Contact angle measurements indicated a decrease in the contact angle of galena surface with the addition of PF. Impedance tests showed that PF increased the impedance of galena surface. XPS analyses revealed the formation of hydrophilic species on galena surface, decreasing its floatability in the presence of PF. On the other hand, chalcopyrite maintained its floatability due to the formation of hydrophobic species. A descriptive model for the reaction of PF with chalcopyrite and galena was proposed.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Mining & Mineral Processing
Fan Lian et al.
Summary: This paper uses an ionic liquid microemulsion as a collector to enhance the floatability of low-rank coal. Flotation tests show that the microemulsion collector has superior collecting ability. With a consumption of 6 kg/t of microemulsion collector, a satisfactory separation performance of 78.66% combustible material recovery is achieved.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Hongzheng Zhu et al.
Summary: By using a high-speed motion acquisition system, we investigated the trajectory of particles in the bubble trailing vortex. Two typical trajectories were measured. The effects of particle density, size, and fluid flow velocity on entrainment probability were analyzed. Our results provide valuable insights for the development of cleaner mineral flotation technology.
Article
Chemistry, Physical
Bin Yang et al.
Summary: Pentaethoxylated tallow amine (PTA) was introduced as a selective collector for separating siderite from hornblende for the first time. The results showed that PTA strongly collected hornblende but not siderite, leading to enhanced differences in flotation performance. The adsorption measurements revealed that hornblende adsorbed more PTA than siderite, increasing the hydrophobicity of hornblende. The analysis of zeta potential and FTIR confirmed that the strong adsorption of PTA on hornblende was due to hydrogen bonding and electrostatic attraction. The use of PTA as a collector achieved effective separation of hornblende from siderite.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Saikat Saha et al.
Summary: Oil foams stabilized by crystallizing agents have excellent stability and potential applications in consumer products. The behavior of the interfacial layer at different time scales plays a crucial role in product shelf life and processing conditions. Experimental investigation reveals that the dynamics of deformation significantly affect the fate of the interfacial layer.
Article
Chemistry, Physical
Jingfeng He et al.
Summary: This work achieved efficient flotation of fluorite and quartz by adding a combined inhibitor with a mass ratio of 3:1. Compared with the single inhibitor, the combined inhibitor attenuated the activation of quartz, preventing quartz from mingling into fluorite concentrates.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Thermodynamics
Xiaolin Yang et al.
Summary: In this study, a novel hybrid model called convolution-attention parallel network (CAPNet) is proposed for rapid and accurate determination of ash content in coal flotation concentrate by analyzing froth images. The CAPNet model, combining the classic CNN model (ResNet) and attention mechanism, outperforms baseline models in terms of accuracy and stability. It significantly reduces the ash determination time and improves the automation and intelligence level of coal flotation.
Article
Engineering, Marine
Ning Gan et al.
Summary: This paper investigates the behavior of a ventilated bubble injected from a vertical flat surface into a cross-flow. Numerical simulations using OpenFOAM are carried out to study the effects of contact angle, incoming flow direction relative to gravity, and surface tension on the dynamic behavior of the ventilation bubble. The results show that there is a critical contact angle of 90 degrees, beyond which the development of the ventilation bubble along the cross-section is significantly enhanced. Different gas leakage modes are observed at the rear of the bubble, including spherical bubbles falling off and local gas leaks in the form of elongated bubbles. Additionally, when the surface tension coefficient is less than 0.036 N/m, the morphology of the bubble undergoes a significant change, and the bubble develops faster along the width direction. The effect of surface tension induced by changes in fluid characteristics on bubble development is similar to that induced by different wall types.
Article
Environmental Sciences
Zhisheng Zhang et al.
Summary: This study used global reanalysis data and satellite tracking products to reveal the coherence between the variation of eddy kinetic energy and low-frequency ageostrophic energy in the evolution of mesoscale eddies. The low-frequency ageostrophic motions play a dominant role in the growth and decay of eddies.
Article
Energy & Fuels
Qinghui Shi et al.
Summary: Using a high-speed motion acquisition system, this study investigated the effect of gas injection rate on dynamic bubble characteristics in the presence of flotation reagents and analyzed the forces involved in bubble generation. The results showed that as the gas injection rate increased, the bubble aspect ratio decreased, the bubble size increased, and the bubble generation time decreased. The study also found that the bubble deformation was closely related to coal recovery.
Article
Engineering, Chemical
Hainan Wang et al.
Summary: This study investigates the effect of particle hydrophobicity on the bubble-particle collision and subsequent interaction process. It was found that highly hydrophobic particles are more likely to collide and attach to bubbles. The particle hydrophobicity also has a significant impact on the particle trajectories and velocities. The distance between the particle and the bubble remains nearly constant during the particle sliding process. Additionally, hydrodynamic drag plays an important role in the particle sliding process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Yanan Hao et al.
Summary: The comparative experiments showed that the flotation performance of coal in natural water was better than that in degassed water, mainly due to the dissolved gases in natural water promoting the flotation process and causing coal particles to agglomerate more easily, thereby increasing the flotation rate.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Article
Energy & Fuels
Yong Zhang et al.
Summary: The study investigated the thermodynamic and kinetic characteristics of kerosene droplets with different size capillaries, finding that as the capillary inner diameter increased, the formation time of the kerosene droplet became longer and the width/height value decreased. The energy barrier on various mineral surfaces was found to be affected by the kinetic energy per unit superficial area of the kerosene droplet, with a predictive model establishing a critical capillary inner diameter for forming a deuterogenic kerosene droplet.
Article
Geography, Physical
Khaldoon AlObaidi et al.
Summary: By using a novel and low-cost instrumented particle, it is possible to directly assess the motion of stationary particles and study the probability of particle transport in fluid environments. This approach can be applied to a range of similar low-cost instrumented particle applications, spanning the fields of engineering (such as infrastructure and environmental monitoring) and geosciences (such as habitat assessment).
EARTH SURFACE PROCESSES AND LANDFORMS
(2021)
Article
Engineering, Chemical
Daowei Wang et al.
Summary: This study investigated the effect of aggregation/dispersion behaviors of fine hydrophilic particles on their entrainment in batch flotation, finding that in the presence of high dosage of corn starch or corn dextrin, fine hematite was primarily recovered into froth through entrainment rather than true flotation. This research provides evidence for the feasibility of the proposed two-stage aggregation/flocculation flotation concept for fine and ultrafine mineral particles.
MINERALS ENGINEERING
(2021)
Review
Energy & Fuels
Yangchao Xia et al.
Article
Geochemistry & Geophysics
Jose Martinez et al.
Article
Chemistry, Physical
Fatemeh Sadat Hoseinian et al.
PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING
(2020)
Article
Nanoscience & Nanotechnology
Yongxin Song et al.
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Thermodynamics
K. Yu. Vershinina et al.
Article
Acoustics
Santosh Deb Barma et al.
ULTRASONICS SONOCHEMISTRY
(2019)
Review
Chemistry, Physical
Yaowen Xing et al.
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
(2019)
Article
Energy & Fuels
Chenkai Niu et al.
Article
Geochemistry & Geophysics
Danuta Szyszka
Article
Engineering, Chemical
L. Wang et al.
MINERALS ENGINEERING
(2017)
Article
Engineering, Chemical
Guichao Wang et al.
MINERALS ENGINEERING
(2017)
Article
Engineering, Chemical
Mehdi Safari et al.
MINERALS ENGINEERING
(2017)
Article
Engineering, Chemical
Guichao Wang et al.
CHEMICAL ENGINEERING SCIENCE
(2017)
Article
Engineering, Chemical
Guichao Wang et al.
MINERALS ENGINEERING
(2016)
Article
Physics, Fluids & Plasmas
Jose Carlos Cano-Lozano et al.
PHYSICAL REVIEW FLUIDS
(2016)
Article
Engineering, Chemical
Hongqiang Li et al.
INTERNATIONAL JOURNAL OF MINERAL PROCESSING
(2014)
Article
Mechanics
J. C. Cano-Lozano et al.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2013)
Article
Mining & Mineral Processing
He Jingfeng et al.
INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY
(2012)
Article
Engineering, Chemical
Rodrigo A. Grau et al.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2010)
Article
Mechanics
Daniel Gaudlitz et al.
Article
Engineering, Chemical
P. T. L. Koh et al.
MINERALS ENGINEERING
(2008)
Article
Mechanics
G Kawahara
