Preliminary study on foreign slime for the gravity separation of coarse coal particles in a teeter bed separator

Bu, Xiangning; Ni, Chao; Xie, Guangyuan; Peng, Yaoli; Wang, Chuanzhen; Sha, Jiahao

doi:10.1016/j.minpro.2017.01.009

Cited by 17 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even the retention time of fotation is extended indefnitely, and it is unlikely that the recovery of hard foating particles with weak hydrophobicity will be 100%. Figure 14 shows the plots of experimental data ftted by the two kinetic models occurred at diferent fotation time intervals, pertaining to the actual fotation yields [54,[68][69][70]. Te parameters of the kinetic models are summarized in Table 3.…”

Section: Flotation Kineticsmentioning

confidence: 99%

Effective Removal of Ibuprofen from Aqueous Solution Using Cationic Surface-Active Agents in Dissolved Air-Flotation Process

Pooja,

Senthil Kumar,

Chitra

et al. 2024

International Journal of Chemical Engineering

View full text Add to dashboard Cite

This research paper focuses on the removal of the nonsteroidal anti-inflammatory drug, ibuprofen, from an aqueous solution using a dissolved air flotation process. The comparison of different types of cationic surface-active agents such as cetyltrimethyl ammonium bromide (CTAB), tetrabutyl ammonium bromide (TBAB), and octyltrimethyl ammonium bromide (OTAB) have been employed to scrutinize the effective removal of the ecotoxic pharmaceutically active compound. The work included the influencing parameters such as pressure, contact time, surfactant dosage, pH, flow rate, and initial concentration owing to the best-optimized conditions. The maximum removal rate of 96.09% was achieved at 15 min for CTAB, TBAB had 62.36% at 45 min, and 89.6% was obtained for OTAB at 30 min, with 50 mg L−1 as the initial concentration and pH = 4. The removal rate was better with the optimized dosage of CTAB at 0.6 g, TBAB at 1.2 g, and OTAB at 1.0 g. It was observed that the geometric shape of the surface-active agents had greater impacts on the contaminants’ efficiency. CTAB and OTAB were combined to find out the best possible removal rate of contaminants. The synergistic effect augments surfactant-based occurrence to be better in forming a good foaming effect and tends to have a lower critical micelle concentration (CMC). From the evaluation of kinetic models, pseudo-second-order flotation kinetics fitted the experimental data best. Furthermore, the formed metabolites that had been identified using gas chromatography-mass spectrometry were found to be less toxic than the parenting compounds.

show abstract

Section: Flotation Kineticsmentioning

confidence: 99%

Effective Removal of Ibuprofen from Aqueous Solution Using Cationic Surface-Active Agents in Dissolved Air-Flotation Process

Pooja,

Senthil Kumar,

Chitra

et al. 2024

International Journal of Chemical Engineering

View full text Add to dashboard Cite

show abstract

“…In coal preparation plants, coal of size > 0.5 mm is commonly upgraded by gravity separation devices, such as teeter bed separators [29,30], spirals [31,32], dense medium cyclones [33,34], and jigs [35,36]. Flotation is an effective method to separate hydrophilic gangue from hydrophobic coal (<0.5 mm) [37,38].…”

Section: Coal Samplementioning

confidence: 99%

Characterization and Removal Potential of Fluorine in Lignite from a Mine in Shaanxi Province, China: A Case Study

Zhou

et al. 2022

Minerals

Self Cite

View full text Add to dashboard Cite

Fluorine appears in coal and is released into the atmosphere upon combustion, resulting in harmful impacts on the environment and life, which needs to be removed from coal before utilization. Coal can be processed by flotation and gravity separation to reduce its fluorine content. In this study, a lignite sample from a mine in Shaanxi Province, China, was characterized using the float–sink test, sieving test, X-ray diffraction (XRD), and polarized light microscopy. Mineralogical analysis indicated that the fluorine in coal is mainly contained in Muscovite and polylithionite, and partly in pyrite. The washability and floatability analyses were employed to evaluate the extent of fluorine removal from >0.5 and <0.5 mm size fractions of lignite, respectively. Compared to the raw sample that contained 347.74 μg/g fluorine content, the proposed combination of gravity-flotation separation process decreased the fluorine content to 90.14 μg/g, which meets the requisites of coal standards.

show abstract

“…Hydraulic classifiers display several advantages including stable operation, ease of use, small size, and high classification efficiency, among others. For this reason, they have been widely used in various fields such as mineral processing engineering [1,2].…”

Section: Introductionmentioning

confidence: 99%

Classification Performance of a Novel Hydraulic Classifier Equipped with a W-Shaped Reflector

et al. 2022

View full text Add to dashboard Cite

In the present research, we propose the use of a novel hydraulic classifier equipped with a W-shaped reflector to enhance classification performance. The effects of the structural dimensions of a W-shaped reflector on the flow field of a classifier and its classification performance were investigated using numerical simulations and experiments. The results demonstrate that the reflection of the W-shaped reflector results in the return of the feed material back to the classification cavity. After this, the materials are mixed with a rising water flow in order to avoid the settlement of particles. Thus, the particles can stay longer in the classification cavity, facilitating the generation of a suspension bed and effectively improving the classification efficiency and accuracy. Our data indicates that the overall classification efficiency of the classifier embedded with the W-shaped reflector was 11.19% higher than that of a traditional classifier. Our results provide a reference for classifier optimization.

show abstract

Preliminary study on foreign slime for the gravity separation of coarse coal particles in a teeter bed separator

Cited by 17 publications

References 18 publications

Effective Removal of Ibuprofen from Aqueous Solution Using Cationic Surface-Active Agents in Dissolved Air-Flotation Process

Effective Removal of Ibuprofen from Aqueous Solution Using Cationic Surface-Active Agents in Dissolved Air-Flotation Process

Characterization and Removal Potential of Fluorine in Lignite from a Mine in Shaanxi Province, China: A Case Study

Classification Performance of a Novel Hydraulic Classifier Equipped with a W-Shaped Reflector

Contact Info

Product

Resources

About