Influência das variáveis de processo do hidrociclone para tratamento de argilas esmectitícas

Gama, A. J. A.; Figueiredo, Jorge C. A. de; Cartaxo, J. M.; Gama, M. A.; Neves, G. A.; Ferreira, H. C.

doi:10.1590/0366-69132017633672129

Cited by 7 publications

(8 citation statements)

References 25 publications

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“…A simple method for purification of clay was analyzed, with tests showing that centrifuge speed influences the purification process of bentonite; low speeds reduce the purification level and high speeds reduce the performance of montmorillonite [21]. Research studies involving the purification of clay by the hydrocyclone method have been developed at the Federal University of Campina Grande (UFCG), with special mention of [22][23][24][25][26], in which the efficiency of this method was confirmed for several different applications.…”

Section: Influence Of the Purification Of Bentonite Clay From New Depmentioning

confidence: 99%

Influence of the purification of bentonite clay from new deposits in the state of Paraíba-Brazil for use in water-based drilling fluids

et al. 2018

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Bentonite clay is used all around the world as an additive in drilling fluids. However, impurities present in this material can compromise the compatibility of the clay-fluid system. The present study aimed to analyze the effects of the purification of bentonite samples from new deposits in the state of Paraíba, Brazil, in order to make them usable in water-based drilling fluids. The samples were first purified by centrifugation, and their characteristics were determined using the following techniques: laser granulometry, X-ray diffraction, chemical analysis, cation exchange capacity, thermogravimetric analysis, and differential thermal analysis. After these determinations, the polycationic clay samples were made sodic through the addition of sodium carbonate (Na2CO3) in the proportion of 125 meq/100 g of dry clay. The rheological and filtration properties (apparent viscosity, plastic viscosity, and filtrate volume) were then tested. The results showed that the purification process was efficient for removing accessory minerals such as quartz, iron, and carbonates. With regard to rheological and filtration properties, the results following centrifugation showed that the material can be suitable for use in water-based drilling fluids.

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Section: Influence Of the Purification Of Bentonite Clay From New Depmentioning

confidence: 99%

Influence of the purification of bentonite clay from new deposits in the state of Paraíba-Brazil for use in water-based drilling fluids

et al. 2018

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“…According to literature, particles smaller than 63.00 μm may have anti-inflammatory effects and may assist in the skin hydration, retaining moisture due to the high skin adhesiveness [25]. Comparing the particle size distribution results of the samples under study with results obtained in [35][36][37][38][39][40][41][42][43][44][45][46][47][48], it was verified that the presented values were similar, showing that these samples had similar physical and granulometric characteristics. All samples had higher mean diameters than that of commercial clay (AC).…”

Section: Materials and Methodologymentioning

confidence: 94%

Characterization of clays from the State of Paraíba, Brazil for aesthetic and medicinal use

Buriti

Silva

et al. 2019

Cerâmica

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This study aimed to evaluate the potential of clays from the State of Paraíba to be used for medicinal, therapeutic and aesthetic treatments. The samples were characterized by X-ray diffraction, X-ray fluorescence chemical composition, thermogravimetry, differential thermal analysis, laser diffraction granulometric analysis, cation exchange capacity, and antimicrobial activity. Based on the study, it was concluded that the clays from the State of Paraíba had properties similar to those of commercial clay. The antimicrobial evaluation revealed that the samples showed no activity against the three bacterial strains of clinical interest: Staphylococcus epidermidis ATCC 12 228, Staphylococcus aureus ATCC 25 923, and Escherichia coli ATCC 25 922. Finally, it was concluded that the clays studied have the potential for technological applications in medicinal, therapeutic, and aesthetic treatments, and as raw material for obtaining biomaterials, due to their stability and biological safety.Este trabalho teve como objetivo avaliar a potencialidade das argilas do estado da Paraíba, visando suas aplicações em tratamentos medicinais, terapêuticos e estéticos. As amostras das argilas foram caracterizadas pelas técnicas de difração de raios X, composição química por fluorescência de raios X, termogravimetria, análise térmica diferencial, análise granulométrica por difração a laser, capacidade de troca catiônica e atividade antimicrobiana. Com base no estudo, concluiu-se que as argilas do estado da Paraíba apresentaram propriedades similares à argila comercial. A avaliação antimicrobiana revelou que as amostras não apresentaram atividade frente a três cepas bacterianas de interesse clínico: Staphylococcus epidermidis ATCC 12 228, Staphylococcus aureus ATCC 25 923 e Escherichia coli ATCC 25 922. Por fim conclui-se que as argilas estudadas possuem potencial tecnológico para aplicações em tratamentos medicinais, terapêuticos, estéticos e como matéria-prima para obtenção de biomateriais, em virtude da sua estabilidade e segurança biológica. Palavras-chave: argilas, biominerais, caracterização, tratamento medicinal.

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“…It was dimensioned for particle separation with an average diameter of 2 to 5 µm. A schematic of this equipment can be found elsewhere [27]. The process variables used in this study were: pressure (3.0 to 4.0 bar), opening of the vortex (5.0, 5.5 and 6.0 mm) and opening of the apex (3.0, 4.0 and 5.0 mm).…”

Section: Methodsmentioning

confidence: 99%

Factorial design and statistical analysis of smectite clay treatment by hydrocyclone

et al. 2018

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Bentonite clays are materials composed by one or more smectite clay minerals and some accessory minerals, mainly quartz, cristobalite, mica, feldspars and other clay minerals such as kaolinite. These contaminants present in clays have a large distribution of particle sizes which severely restrict their industrial applications, with the use of hydrocyclone as a likely solution for their reduction. This study aims to analyze the treatment of smectite clays from the state of Paraíba using modeling, simulation and optimization of the variable average particle diameter in relation to various process variables related to the hydrocyclone. In this study, the average diameter of smectite clays was evaluated as a function of the factors: pressure, apex diameter and vortex diameter of the hydrocyclone. Complete factorial design and addition in the central points were used to model the hydrocycloning process. The results evidenced reduction in equivalent average particle size of approximately 19.2%. Regarding the simulations, the optimum point with the lowest value was found for the average diameter of 4.033 µm, with a pressure of 4.3 bar, apex opening of 5.3 mm, and vortex opening of 6.3 mm, all at a 95% confidence level.

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Influência das variáveis de processo do hidrociclone para tratamento de argilas esmectitícas

Cited by 7 publications

References 25 publications

Influence of the purification of bentonite clay from new deposits in the state of Paraíba-Brazil for use in water-based drilling fluids

Influence of the purification of bentonite clay from new deposits in the state of Paraíba-Brazil for use in water-based drilling fluids

Characterization of clays from the State of Paraíba, Brazil for aesthetic and medicinal use

Factorial design and statistical analysis of smectite clay treatment by hydrocyclone

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