Effects of particle size on flotation parameters in the separation of diaspore and kaolinite

Zhang, Ningning; Zhou, Changchun; Cheng, Long; Pan, Jinhe; Tang, Mengcheng; Cao, Shenggen; Ouyang, Chang-Heng; Peng, Chang-Bin

doi:10.1016/j.powtec.2017.04.049

Cited by 40 publications

(5 citation statements)

References 44 publications

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“…Finally, inductively coupled plasma mass spectrometry (ICP-MS) (Agilent 7900, USA) was used to test the content of REEs in the above liquid sample. ICP-MS has good reproducibility and high efficiency for the determination of REEs , and its relative standard deviation (RSD) is lower than 4.0%. − The contents of the REEs are listed in Table . The total REE content in this CFA sample is 489 ppm, which is higher than the average content (445 ppm) in the world CFA .…”

Section: Methodsmentioning

confidence: 99%

Study on Influence Factors of Leaching of Rare Earth Elements from Coal Fly Ash

et al. 2018

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Rare earth elements (REEs) are very important strategic resources, but the traditional high-quality rare earth resources are becoming increasingly scarce. Coal fly ash (CFA) in some areas in the world has a high REE content, which can be a potential supplement to the rare earth resources. CFA samples collected from the Panbei Power Plant in Guizhou Province of China, in which the REE content is 489 ppm, was used as the research object in this study. Taking three REEs (lanthanum (La), cerium (Ce), and neodymium (Nd)) with the highest content in this CFA sample as the representative and hydrochloric acid as the leaching reagent, the effects of various factors on the leaching efficiencies of REEs from CFA were investigated systematically. Further, two unreacted core shrinkage models (chemically controlled model and diffusion controlled model) were used to study the leaching kinetics of REEs from CFA. The results showed that, except for the small influence of the stirring speed, the temperature, acid concentration, liquid−solid ratio, and reaction time all have a great influence on the leaching efficiencies of REEs. Leaching efficiencies of 71.9, 66.0, and 61.9% for La, Ce, and Nd, respectively, were obtained under the conditions of a stirring speed of 200 rpm, temperature of 60 °C, HCl concentration of 3 M, liquid−solid ratio of 10 (v/m), and leaching time of 120 min. The leaching mechanism of REEs from CFA tends to be more controlled by chemical reactions. In addition, La is more easily leached from CFA than Ce and Nd. This study can provide theoretical guidance for optimizing the leaching conditions of REEs from CFA at low temperature and atmospheric pressure, thereby providing theoretical support for the early industrial development and utilization of rare earth resources in CFA.

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Section: Methodsmentioning

confidence: 99%

Study on Influence Factors of Leaching of Rare Earth Elements from Coal Fly Ash

et al. 2018

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“…For the CSW system, particle size characteristics (including particle size, particle size composition, and homogeneity) are important physical properties of minerals and important factors affecting the sedimentation of CSW. Changes in particle radius will directly affect the aggregation, dispersion, sedimentation and migration behaviour of particles Zhang et al, 2017;Zhou et al, 2022). Mineral particles are affected by gravity, buoyancy and Brownian motion at the same time, the finer the particle size, the more intense Brownian motion, Brownian motion makes the concentration of CSW tend to be uniform, the electrostatic repulsion between the particles is enhanced, the dispersion of particles is enhanced, and the degree of aggregation of particles is small.…”

Section: Particle Sizementioning

confidence: 99%

Progress of microscopic interaction between fine particles in coal slurry water

Shang,

Chen,

Ling

et al. 2024

Physicochem. Probl. Miner. Process.

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The interaction between fine particles is widespread in nature and plays a crucial role in regulating various interfaces for minerals. In coal preparation wastewater treatment, the intricate mechanism of interaction between multi-component fine particles in coal slurry water (denoted as CSW) is a fundamental aspect in addressing the challenges of coal slurry water agglomeration, selective separation, and difficult dewatering. This paper presents a summary of the necessity, current research status, and progress in studying the microscopic interaction between mineral particles in CSW systems. It overviews theoretical calculation formulas for particle-particle interaction, factors that influence such interaction, and modern analysis techniques for studying microscopic particle interaction. These findings enhance and refine relevant theories, establish a theoretical foundation, and offer technical support for stabilizing and optimizing the performance of CSW systems. Additionally, it elucidates the mechanism of particle-particle interaction in CSW, which is of significant importance in achieving efficient separation of CSW.

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“…In the process of coal slime flotation, due to mechanical coating and water entrainment, clay minerals have an adverse effect on the flotation of fine coal slime, resulting in low flotation recovery and poor flotation selectivity (Xing et al, 2017). The flotation efficiency is related to the collision, attachment, and detachment between particles and bubbles, and the particle size of coal slime has a significant effect on the flotation behavior of mineral particles (Ai et al, 2017Wang and Tao, 2017; Zhang et al, 2017). The collision efficiency of fine particles and bubbles, particles and collectors is lower than that of the optimal flotation particle size (Miettinen et al, 2010; Yang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effects of particle size on the flotation behavior of coal slime

Deng

Tang

et al. 2023

Energy Exploration & Exploitation

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In order to investigate the influence of particle size on the flotation behavior of coal slime, industrial analysis, elementary analysis, and particle size composition analysis were carried out on coal slime. The coal slime is divided into three sizes: −0.5 + 0.25, −0.25 + 0.074, and −0.074 mm, and full −0.5 mm particle sizes. Through contact angle measurement, wetting heat measurement, and step-by-step release test to investigate the hydrophobicity of each particle size; in addition, the flotation kinetics test of different particle sizes coal slime was also carried out. The results show that the particle size has a significant effect on the flotation behavior of fine coal slime. The medium particle size −0.25 + 0.074 mm has the best hydrophobicity, followed by −0.5 + 0.25 mm, again −0.5 mm, and finally −0.074 mm particle sizes. Use Origin software to fit six kinetic models to the test data of coal slime flotation kinetics, and analyze the maximum combustible recovery [Formula: see text], flotation rate constant (k), and correlation coefficient ([Formula: see text]) of each particle size, The results show that the first-order model with rectangular distribution of floatabilities can better describe the flotation of coal slime of each particle size.

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Effects of particle size on flotation parameters in the separation of diaspore and kaolinite

Cited by 40 publications

References 44 publications

Study on Influence Factors of Leaching of Rare Earth Elements from Coal Fly Ash

Study on Influence Factors of Leaching of Rare Earth Elements from Coal Fly Ash

Progress of microscopic interaction between fine particles in coal slurry water

Effects of particle size on the flotation behavior of coal slime

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