Comparative study of the main flotation frothers using a new HYDROMESS adapted technique

Veras, Moacir Medeiros; Baltar, Carlos Adolpho Magalhães; Paulo, João; Leite, José Yvan Pereira

doi:10.1590/s0370-44672014000100013

Cited by 12 publications

(5 citation statements)

References 5 publications

(1 reference statement)

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“…In the literature, numerous studies have been carried out to investigate the effects of concentration, bubble size, and other underlying mechanisms for coalescence conditions of different frothers [5,10,[15][16][17][18][19][20]. Several methods towards this aim have been utilized to determine the coalescence conditions and their effects on froth characteristics.…”

Section: Introductionmentioning

confidence: 99%

Experimental Procedure for the Determination of the Critical Coalescence Concentration (CCC) of Simple Frothers

et al. 2020

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In this study, the critical coalescence concentrations (CCC) of selected commercial frother solutions, namely polypropylene glycols (PPG 200, 400, and 600), tri propylene glycol (BTPG), triethylene glycol (BTEG), dipropylene glycol (BDPG), and as a reference, methyl isobutyl carbinol (MIBC), were determined using a bubble column based on light absorption. The results for all seven frothers showed that BTEG has the worst bubble inhibiting performance, and PPG 600 has the best bubble inhibiting performance. While critical coalescence concentration (CCC) was found as 3 ppm for PPG 600, it increased to 25 ppm for BTEG. In the case of MIBC, which was the reference point, the CCC value was found as 10 ppm, which was consistent with the literature. The surface tension isotherms of the frothers were determined and analyzed with one of the latest adsorption models. The results indicated that the polypropylene glycol frothers showed more surface activity compared to alcohol or other frothers investigated. This is due to the additional reorganization of the PPG molecules on the air/water interface, thus boosting its surface activity.

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Section: Introductionmentioning

confidence: 99%

Experimental Procedure for the Determination of the Critical Coalescence Concentration (CCC) of Simple Frothers

et al. 2020

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“…Para fins de comparação, são apresentados os resultados dos dois softwares utilizados para o processamento das imagens. Os resultados mostram que conforme a concentração do espumante aumenta, o diâmetro das bolhas diminui e, consequentemente, aumenta o número de bolhas, devido à redução do efeito de coalescência, até atingir a estabilização, corroborando com vários trabalhos da literatura [5,6,8,15,18,19].…”

Section: Resultsunclassified

Avaliação De Tamanho De Bolhas Em Coluna De Flotação Por Análise De Imagem Usando Os Softwares Imagej E Apbs

Almeida¹,

Barreto²,

Couto³

2019

TMM

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O tamanho médio e a distribuição de tamanho de bolhas (DTB) são variáveis importantes no processo de flotação, pois influenciam diretamente na eficiência de coleta e no transporte das partículas. Neste contexto, o objetivo deste trabalho foi medir e avaliar o tamanho médio e a DTB geradas em uma coluna de flotação em função de algumas variáveis importantes do processo de flotação. Para captura e visualização das bolhas foi utilizado o equipamento Anglo Platinum Bubble Sizer (APBS). As imagens das bolhas capturadas foram processadas com utilização de dois softwares, o APBS e o ImageJ, de forma a comparar os resultados obtidos por ambos. Além de calcular o diâmetro médio e a DTB das bolhas, foi possível realizar medidas de holdup de gás (Ɛ g) e da concentração crítica de coalescência (CCC) para o Flotanol D14, agente tensoativo avaliado no trabalho. Os resultados obtidos de Ɛ g e CCC apontaram para uma boa concordância com os valores encontrados na literatura. Considerou-se o ImageJ mais confiável para o processamento de imagem e análise do tamanho de bolha devido ao seu maior controle das etapas de processamento. Palavras-chave: Coluna de flotação; Tamanho de bolha; Análise de imagens.

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“…To operate this cell, the airflow is adjusted at 25 mL/min for an ore sample of 3 g. The frothing agent used is methyl isobutyl carbinol (MIBC) at a concentration of 50 g/t. [ 10,16 ] After each 3‐minute test, the overflow is recovered, and the column is cleaned to recover the underflow of the experiment.…”

Section: Methodsmentioning

confidence: 99%

A continuous‐flow surface flotation cell for the separation of scanty mineral samples based on wettability contrast

2020

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Reliable measurements of hydrophobicity of minerals and ores are important to the study of the separation performance of a froth flotation process. However, surface heterogeneity, which is inexorably linked to actual industrial ores, has always been a challenging factor to characterize with currently existing measurement techniques. In this study, a new apparatus of surface flotation that provides surface floatability and wettability evaluation requiring parsimonious needs in sample consumption is presented. It consists of a continuous‐flow macroscopically flat‐interface flotation cell for the selective separation at a moving liquid‐gas interface between hydrophobic mineral and hydrophilic gangue from scanty mineral samples. To prove the concept, comparative experiments were conducted with a mineral matrix composed of graphite and quartz using the new surface flotation apparatus, a micro‐flotation cell, and a Denver cell. The results obtained from the surface flotation cell indicate that its separation efficiency and its reproducibility are better than the two standard laboratory separation techniques. Use of this new technique provides more and better information related to the wettability of mineral/ore surfaces while requiring as low as 3 g of mineral samples.

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Comparative study of the main flotation frothers using a new HYDROMESS adapted technique

Abstract: Stability of bubble size in the pulp zone and froth control is an important param

Cited by 12 publications

References 5 publications

Experimental Procedure for the Determination of the Critical Coalescence Concentration (CCC) of Simple Frothers

Experimental Procedure for the Determination of the Critical Coalescence Concentration (CCC) of Simple Frothers

Avaliação De Tamanho De Bolhas Em Coluna De Flotação Por Análise De Imagem Usando Os Softwares Imagej E Apbs

A continuous‐flow surface flotation cell for the separation of scanty mineral samples based on wettability contrast

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