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Enhanced Washburn Method (EWM): A comparative study for the contact angle measurement of powders
Mining and Metallurgical Engineering Department, Yazd University, Yazd, Iran.
Mining and Metallurgical Engineering Department, Yazd University, Yazd, Iran.
Laboratory of Transport Phenomena and Chemistry of Interfaces, Department of Mining and Petroleum Engineering, Av. Prof. Mello Moraes 2237, University of São Paulo, São Paulo, Brazil.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.ORCID iD: 0000-0002-2265-6321
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2020 (English)In: Advanced Powder Technology, ISSN 0921-8831, E-ISSN 1568-5527, Vol. 31, no 12, p. 4665-4671Article in journal (Refereed) Published
Abstract [en]

Washburn Method (WM) as a typical contact angle measurement (θ) method can be used for assessment of powder wettability (especially representative particle size range for flotation separation). However, as an indirect method, WM has several limitations. This investigation is going to introduce an Enhanced Washburn Method (EWM), which fills the gap of those WM obstacles, and can be applied for the meaningful indirect θ measurement of powders. For such a purpose, the wettability of quartz powders (d80: 62 μm) was measured in the absence and in the presence of the cationic surfactant Flotigam®EDA at pH 10. EWM by using pre-conditioning of hydrophobized particles via unblock capillaries measured the θ of powders in different conditions. Statistical evaluations indicated that EWM could quite accurately measure θ of the hydrophobized powders, where there is a significant coefficient of determination (R2 above 0.96) between EWM outcomes and other examined direct θ measurement methods (the captive bubble and sessile drop methods).

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 31, no 12, p. 4665-4671
Keywords [en]
Contact angle, Enhanced Washburn method, Sessile drop, Captive bubble, Flotation
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-81826DOI: 10.1016/j.apt.2020.10.014ISI: 000612085800009Scopus ID: 2-s2.0-85096586443OAI: oai:DiVA.org:ltu-81826DiVA, id: diva2:1506335
Note

Validerad;2021;Nivå 2;2021-01-26 (alebob);

Finansiär: Vale Institute of Technology

Available from: 2020-12-03 Created: 2020-12-03 Last updated: 2023-09-05Bibliographically approved

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Chelgani, Saeed Chehreh

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