Effect of agitation on the interaction of coal and kaolinite in flotation

Yu, Yuexian; Gan, Cheng; Ma, Liqiang; Huang, Gen; Wu, Lun; Xu, Huaizhe

doi:10.1016/j.powtec.2017.03.002

Cited by 74 publications

(26 citation statements)

References 23 publications

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“…To remove the clay slime coating from valuable mineral surfaces, both physical and chemical pretreatments have been developed. The physical pretreatment includes the application of high intensity agitation, desliming hydrocyclone, and ultrasonic treatment (Celik et al 2002;Oats et al 2010;Yu et al 2017aYu et al , 2017b. The chemical treatment is mainly the application of various dispersants (Seaman et al 2012;Wei et al 2013;Liu and Peng 2015).…”

Section: Introductionmentioning

confidence: 99%

Managing clay minerals in froth flotation—A critical review

Chen

Peng

2018

Mineral Processing and Extractive Metallurgy Review

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Clay minerals are widely present in various ore deposits as gangue minerals. The processing of high-claycontent ores is becoming a significant challenge for the mining industry owing to the poor flotation performance caused by the presence of clay minerals. Different types of clay minerals are typically present in ore bodies, and they cause several detrimental effects to flotation that require different treatments. In this article, a comprehensive review of the studies on understanding and mitigating the negative effects of clay minerals in flotation is presented. It starts with a review of the classification and structures of clay minerals commonly occurring in ore deposits and their properties that determine the behavior of clay minerals in flotation. It is followed by a critical review of two main negative effects of clay minerals on flotation, the recent research findings mainly from The University of Queensland group. The first negative effect is the coating of clay minerals on the surface of valuable minerals that decreases the floatability of valuable minerals. The second negative effect is the formation of network structures in the slurry. Depending on the type and strength of the network structure, it can cause either high pulp viscosity or increased gangue entrainment, which reduces the flotation recovery and flotation product grade, respectively. In this section, the mechanisms and key factors behind each negative effect are presented and critically discussed. Then, the approaches and techniques developed to mitigate the different negative effects of clay minerals are reviewed. To conclude, future directions for a more complete understanding of mechanisms and problem solving are recommended.

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Section: Introductionmentioning

confidence: 99%

Managing clay minerals in froth flotation—A critical review

Chen

Peng

2018

Mineral Processing and Extractive Metallurgy Review

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“…[1][2][3] However, the industry waste water generated by these plants severely destroys and pollutes the natural water environment and further threatens human health, since this industry waste water is infamous for high turbidity caused by high levels of suspended solids (SS). [4][5][6] The task of separating suspended solids becomes more and more challenging and hard because these suspended solids are always negatively/positively charged and these colloidal particles suspend stably in the water. 7 According to statistics, the turbidity of the waste water has reached 10 000 NTU in some cases in China.…”

Section: Introductionmentioning

confidence: 99%

Fabricating an anionic polyacrylamide (APAM) with an anionic block structure for high turbidity water separation and purification

et al. 2017

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ab Ultraviolet (UV)-initiated template polymerization (UTP) was used as a feasible strategy to prepare a novel anionic polyacrylamide (APAM) with a microblock structure. In the template copolymerization system, acrylamide (AM) and sodium allylsulfonate (SAS) were used as monomers, and poly Results showed that the novel anionic microblock structure was formed in the template copolymer.Besides, the results of the association constant (K M ) indicated that the copolymerization followed I Zipup (ZIP) template polymerization mechanism, which indicated the formation of the microblock structure again. Parameters such as pH and dosage that affected the flocculation performance, flocculation kinetics and the FTIR spectra of the generated flocs were investigated to further observe the effect of anionic microblocks on flocculation performance and understand the relationship between the flocs and flocculants. Flocculation experimental results demonstrated that the anionic microblocks in the template copolymer could enhance the charge neutralization and bridging ability, and therefore an excellent flocculation performance of treating high turbidity water was observed.

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“…The revolving speed of the impeller had an influence on the turbulence intensity of the pulp, which affected the collision probability of mineral particles and bubbles [33]. The inflation rate was 0.25 m 3 /(m 2 ·min), the pulp concentration was 100 g/L, the frother dosage was 500 g/t, and C4 dosage was 300 g/t.…”

Section: Effect Of Revolving Speedmentioning

confidence: 99%

Optimization of Coal Washery Tailings by Flotation Process

2019

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Flotation tailings are by-products of coal preparation plants, which do not only occupy cultivated land but also cause pollution. The high ash content and low calorific value of tailings limit their applications. Deashing is the precondition for the reutilization of flotation tailings. However, it is more difficult to remove ash content from flotation tailings compared with raw coal. Based on the analysis of coal properties, the flotation performance of different collectors was compared in this study. Flotation flows and the mechanism of depressants were explored. The optimized flotation conditions were as follows: pulp concentration of 100 g/L, inflation rate of 0.25 m3/(m2·min), collector (C4) dosage of 300 g/t, frother dosage of 500 g/t, and revolving speed of 2200 rpm. The ash content of clean coal was also reduced by adding a depressant. The flotation performance was best when the amount of sodium hexametaphosphate (used as the depressant) was 4 kg/t; the recovery of clean coal was 71.88%, and the ash content was 10.64%.

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Effect of agitation on the interaction of coal and kaolinite in flotation

Cited by 74 publications

References 23 publications

Managing clay minerals in froth flotation—A critical review

Managing clay minerals in froth flotation—A critical review

Fabricating an anionic polyacrylamide (APAM) with an anionic block structure for high turbidity water separation and purification

Optimization of Coal Washery Tailings by Flotation Process

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