Flotation of sylvite from potash ore by using the Gemini surfactant as a novel flotation collector

Huang, Zhiqiang; Cheng, Chen; Zhong, Hong; Guo, Zhizhong; Yu, Xinyang; He, Guichun; Han, Haijun; Deng, Lanqing; Fu, Weng

doi:10.1016/j.mineng.2018.11.055

Cited by 49 publications

(9 citation statements)

References 23 publications

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“…Bubble nucleation and growth on solid surfaces in a liquid is a widespread phenomenon in many fields of science and engineering, from boiling and heat transfer to cavitation and separation technology (Gong and Cheng, 2013;Huang et al, 2019;Liu et al, 2019;Yang and Wang, 2019). The heterogeneously nucleated bubbles can be attributed to the vapour bubbles and air bubbles under different conditions.…”

Section: Introductionmentioning

confidence: 99%

An analytical model of the growth of invisible bubbles on solid surfaces in a supersaturated solution

Yang

Bao

Cheng

et al. 2020

Chemical Engineering Science

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Heterogeneous nucleation of gas bubbles is central to many engineering fields, from boiling and heat transfer to cavitation and particle separation. In this paper, models accounting for the origin and growth of gas bubbles on solid surfaces in a supersaturated solution are proposed by applying the diffusion theory and the molecular-kinetic model. Both are validated by the available experimental results during the specific period. The theory provides an explanation for the bubbles' growth from the pre-existing invisible nanobubbles on the submerged surface. The non-linear evolution of the bubble is attributed to the progression from the pinning stage to the floating stage, transition stage and expansion stage. In the pinning stage, when the base radius of the optically invisible surface bubbles is smaller than the critical value they are speculated to be stable with the constant base radius because , of the equilibrium between the driving force of diffusion and the Laplace pressure. Otherwise, the contact line of the surface bubble will start to move, is no longer pinned, and continues to grow with a constant bubble radius, which is called the floating stage. This is followed by the transition stage in which both the bubble radius and contact angle change with time. The final expansion stage is characterised by the bubble growth with the constant contact angle. Unlike the classical Epstein-Plesset model for bubble growth in the bulk, the diffusion theory can satisfactorily predict the growth of surface bubbles while the molecular-kinetic model can only fit the floating and expansion stages.

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Section: Introductionmentioning

confidence: 99%

An analytical model of the growth of invisible bubbles on solid surfaces in a supersaturated solution

Yang

Bao

Cheng

et al. 2020

Chemical Engineering Science

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“…Gypsum residue contains flotation agents, a class of organic substances that can significantly change the surface tension of the solution and the hydrophobicity of the solid phase particles, − thus affecting the crystallization of calcium sulfate whiskers. In order to make full use of the acid decomposition residue of scheelite to prepare calcium sulfate whiskers, it is necessary not only to obtain the process conditions for their preparation but also to solve the influence of nonlattice cationic impurities on the crystallization and morphology of calcium sulfate whiskers so as to prepare calcium sulfate whiskers with better morphology under simple and economic conditions.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Tungsten in the Process of Preparation of Calcium Sulfate Whiskers from Scheelite Decomposed Residue

Liu

Zhai

Chen

et al. 2022

ACS Sustainable Chem. Eng.

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When treating complex co–associated low–grade scheelite with sulfur and phosphorus mixed acid co–decomposition techniques, the deterioration in tungsten resource endowment can result in significantly lower decomposition rates, with tungsten content in the decomposition residue (gypsum residue) as high as 2%. In this paper, it is envisaged that by dissolving the gypsum residue in hydrochloric acid to separate it from insoluble tungsten and then regulating the supersaturation of calcium sulfate in the hydrochloric acid solution to prepare calcium sulfate whiskers, not only can the tungsten in the decomposition residue be recovered but also the resource utilization of gypsum can be realized. The effect of Fe3+, Na+, and NH4 + on the crystallization process and morphology of calcium sulfate whiskers was investigated using atmospheric pressure acidification. When the addition amount of gypsum residue was 5.75 g/100 mL, the concentration of hydrochloric acid was 100 g/L, the stirring rate was 100 rpm, the addition amount of NaCl was 30 g/L, the temperature was reduced from 80 to 50 °C, and the L/D ratio of calcium sulfate whiskers could reach 48. The effect of mother liquor circulation on the morphology of calcium sulfate whiskers was also investigated, and the morphology of calcium sulfate whiskers was still good after 10 cycles. During the cycling process, tungsten could be enriched in the residue, and the residue tungsten content could be increased from 3 to 14%.

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“…In addition, new surfactants are being synthesized to carry out the process more efficiently. [13][14][15][16] Flotation frothers in the composition of the collecting mixture create a foam of the required stability and size, help preserve air bubbles in a dispersed state and prevent their coalescence. 17 The apolar reagents (oils) provide hydrophobization of both the mineral and the air bubble, making it possible to increase the adhesion of an air bubble to a mineral particle and intensify KCl extraction into a foam product with lower losses.…”

Section: Introductionmentioning

confidence: 99%

Intensification of potash ore flotation by the introduction of industrial oils

Osipova

Shevchuk

Stromski³

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND:The paper comprises the study of the enrichment process of potash ore with the addition of industrial oils I-8A, I-12A, I-30A to the base complex collector as an additional hydrophobizator.RESULTS: Comparative studies of flotation using liquid paraffins and industrial oils have shown the effectiveness of the latter. Physical research methods showed the effect of hydrophobizing additives on the adsorption of amine on potassium chloride crystals.CONCLUSION: The research found that introducing industrial oils into the flotation system ensures potassium chloride extraction at the same level 93.25-94.86% as when using a collective mixture with liquid paraffins. It was 10.2-11.5% higher than when using a collective mixture without apolar reagents. Thus, the best flotation performance using industrial oils was possible due to increased apolar reagent consumption. The optimal consumption of industrial oil under laboratory conditions was 20-25 g t -1 ore.

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Flotation of sylvite from potash ore by using the Gemini surfactant as a novel flotation collector

Cited by 49 publications

References 23 publications

An analytical model of the growth of invisible bubbles on solid surfaces in a supersaturated solution

An analytical model of the growth of invisible bubbles on solid surfaces in a supersaturated solution

Recovery of Tungsten in the Process of Preparation of Calcium Sulfate Whiskers from Scheelite Decomposed Residue

Intensification of potash ore flotation by the introduction of industrial oils

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