Use of oscillatory air supply for improving the throughput and carrying capacity of column flotation

Wang, Junyu; Park, Hangil; Ng, Chun Yong; Wang, Liguang

doi:10.1016/j.powtec.2019.05.006

Cited by 11 publications

(3 citation statements)

References 16 publications

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“…Advantages of a column flotation over others include lower operating costs due to the absence of movable parts, less energy consumption due to the absence of a compressor or rotating parts (agitators), less floor space requirements due to its vertical construction as compared to the conventional flotation systems (Rubinstein 1995;Chaiarrekij et al 2000) and reasonable flexibility for automatic controls (Wang et al 2019). Due to the recurring expansion of flotation technology application in varying industries, the use of flotation columns has pioneered the development and improvement of sparger systems (Finch 1995).…”

Section: Centrifugal Flotationmentioning

confidence: 99%

Influence of diffuser design on selected operating variables for wastewater flotation systems: a review

Mukandi

Basitere

Okeleye

et al. 2021

Water Practice and Technology

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Air diffusers or spargers have since been used in separation processes that include conventional wastewater treatment. Over the years, there has been advancements in diffuser design in terms of shape, pore size, orientation and materials of construction as a way of mitigating challenges such as fouling, clogging, energy consumption and poor system efficiency. Some of the available air diffusers are inadequate to solve most of these challenges due to reduced quality and increased quantity of wastewater being treated. Additionally, there is a paucity of information regarding air diffuser design and their effect on operational parameters in wastewater treatment. This review seeks to address the advancement in diffuser design and also the effects of design factors including parameters of air diffusers with a focus of their use in a column flotation system for wastewater treatment.

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Section: Centrifugal Flotationmentioning

confidence: 99%

Influence of diffuser design on selected operating variables for wastewater flotation systems: a review

Mukandi

Basitere

Okeleye

et al. 2021

Water Practice and Technology

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“…This implies reverse flotation, usually under acidic conditions, using cationic amine collectors for feldspar removal and anionic petroleum sulphonate collectors for the removal of iron-bearing minerals [3,42,43], where a concentrate of im-purities is removed as froth overflow from the flotation cell, leaving a quartz concentrate as the underflow product. Column flotation has gained great popularity in the mineral processing industry and is commonly applied as the cleaning stage of flotation circuits due to its capability for producing higher grade concentrates at good recoveries compared to the flotation in conventional mechanically agitated cells [44][45][46][47][48]. Even though flotation is a widely known and one of the most broadly used methods for separating valuable minerals from gangue since being introduced in the early 1900s, it is still not entirely understood [49], primarily because it is a complex process influenced by many variables, such as the pulp density and flow rate, air flow rate, pulp pH, particle-size distribution, mineralogical properties of the ore, flotation reagent type and dosage, bubble diameter and bubble size distribution, froth depth, wash water flow rate, etc.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Operating Variables on the Performance of Column Flotation of Silica Sand

Sobota,

Bedeković

2024

Minerals

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This paper presents the results of a study performed on silica sand samples to determine the effect of operating parameters (collector type and dosage, solids content in the pulp, pulp pH and air flow rate) on the concentrate grade and mass recovery in laboratory-scale column flotation. Through the analysis of variance (ANOVA), it was determined that the pulp pH had a significant impact on all four of the observed grade parameters (mass contents of SiO2, Al2O3, Fe2O3 and TiO2 in the concentrate). Air flow rate had a significant impact on the mass contents of SiO2 and Al2O3. The solids content in the pulp only significantly affected the mass content of Fe2O3. The mass recovery was significantly influenced by the pulp pH, with a high level of significance (p-value (p) = 0.002917), as well as by the air flow rate (p = 0.010285). On the basis of a model of the relationship between the respective grade parameters and tested operating variables, it was determined that with the use of the Aeromine 3030C collector (at a dosage of 500 g/t) the highest-grade concentrate regarding the mass contents of SiO2, Al2O3 and TiO2 was achieved with a pulp pH within a range from 2.4 to 3 and an air flow rate above 26 L/h. The lowest mass content of Fe2O3 in the concentrate was achieved at a pulp pH in a range from 2.2 to 2.8 and a solids content in the pulp between 2.0% and 3.5%.

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“…For this study, column flotation was explored as it is relatively cheap. The advantages of a column flotation are higher separation efficiency, lower capital required due to the simplicity of the system setup, and lower operating cost due to the lack of complexity of the process [11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Selected Operating Process Variables for a Bioflocculant Supported Column Flotation System

Mukandi,

Basitere,

Ntwampe

et al. 2024

Water

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The poultry industry generates significant volumes of slaughterhouse wastewater, laden with numerous pollutants, thus requiring pretreatment prior to discharge. However, new technologies must be used to re-engineer the existing wastewater treatment equipment and incorporate new designs to improve the treatment processes or system performance. In this study, three variables, i.e., diffuser design, bioflocculant form, and flow rate, were evaluated to determine their effect on the performance of a bioflocculant-supported column flotation (BioCF) system. It was found that bioflocculants influenced diffuser performance with limited impact when the feed flow rate was varied, i.e., 3D-printed air diffusers and cell-free flocculants imparted high BioCF performance when compared to moulded diffusers and cell-bound flocculants. Notably, the combination of 3D-printed air diffusers and cell-free flocculants resulted in relatively high pollutant removal (81.23% COD, 94.44% TSS, 97.77% protein, and 90.38% turbidity reduction). The study lays a foundation for exploring 3D-printed air diffusers, a relatively new technology in conjunction with microbial flocculants usage that are regarded as eco-friendly for application in industry to enhance the performance of column flotation systems.

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Use of oscillatory air supply for improving the throughput and carrying capacity of column flotation

Cited by 11 publications

References 16 publications

Influence of diffuser design on selected operating variables for wastewater flotation systems: a review

Influence of diffuser design on selected operating variables for wastewater flotation systems: a review

The Effect of Operating Variables on the Performance of Column Flotation of Silica Sand

Evaluation of Selected Operating Process Variables for a Bioflocculant Supported Column Flotation System

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