Study of effective parameters on generating submicron (nano)-bubbles using the hydrodynamic cavitation

• Autorzy: Nazari Sabereh , Shafaei Sied Ziaedin , Hassanzadeh Ahmad , Azizi Asghar , Gharabaghi Mahdi , Ahmadi Rahman , Shahbazi Behzad

Identyfikatory

DOI

10.37190/ppmp/126628

• Języki publikacji: EN

Abstrakty

EN

Although submicron (nano)-bubbles (NBs) have been broadly used in the laboratory flotation processes, the role of critical factors in their generation is not adequately explored in the literature. The present study investigates the effect of six key factors on generating submicron-sized bubbles and its application to coarse-sized quartz flotation. Interaction of influential factors is highlighted, which was generally overlooked in previous studies. These parameters i.e. frother type (MIBC and A65), frother dosage (50-130 mg/L), air flow rate (0.1-0.4 L/min), pressure in Venturi tube (250-400 kPa), liquid temperature (22-42 °C) and pH (6-10) were evaluated through software based statistical fractional factorial design. The size distribution of NBs produced by the principle of hydrodynamic cavitation was measured using a laser particle size analyzer (LPSA), and Sauter mean bubble diameter (d32) was considered as the response of experimental design. Batch flotation experiments were performed with and without the A65 and MIBC-NBs. The results of experimental design showed that relative intensity of the main factors followed the order of air flow rate>temperature>frother type as the most effective parameters on the bubble size. It was revealed that the lowest air flow rate (0.1 L/min) produced the smallest bubbles. Meanwhile, the d32 decreased as the liquid temperature increased, and the bubble size strongly was related to the frother type and its concentration. Indeed, with changing frother from MIBC to A65, the reduction in mean bubble size was two-fold. Interaction of frother type with its dosage, air flow rate and pressure were statistically recognized significant on the mean bubble size, which was confirmed by p-values. Finally, flotation recovery of quartz particles improved ca. 22% in the presence of NBs compared to the conventional flotation.

Słowa kluczowe

EN

coarse quartz particles; bulk nanobubbles (NBs); fractional factorial design; frother type; temperature

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2020
• Tom: Vol. 56, iss. 5
• Strony: 884--904
• Opis fizyczny: Bibliogr. 64 poz., rys., tab.

Twórcy

autor

Nazari Sabereh

• School of Mining Engineering, College of Engineering, University of Tehran, 1439957131 Tehran, Iran

autor

Shafaei Sied Ziaedin

• School of Resources Engineering, Xi’an University of Architecture and Technology, 710055 Xi’an, China
• School of Mining Engineering, College of Engineering, University of Tehran, 1439957131 Tehran, Iran

autor

Hassanzadeh Ahmad

• Department of Processing, Helmholtz Institute Freiberg for Resource Technology, Helmholtz-Zentrum DresdenRossendorf, Chemnitzer Str. 40, 09599 Freiberg, Germany
• [e-mail]

autor

Azizi Asghar

• Faculty of Mining, Petroleum and Geophysics, Shahrood University of Technology, 3619995161 Shahrood, Iran

autor

Gharabaghi Mahdi

• School of Mining Engineering, College of Engineering, University of Tehran, 1439957131 Tehran, Iran

autor

Ahmadi Rahman

• Department of Mining Engineering, Imam Khomeini International University, 3414896818 Qazvin, Iran

autor

Shahbazi Behzad

• Mining Engineering Department, Tarbiat Modares University, 1411713116 Tehran, Iran

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