Temat: bubble Sauter diameter - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Study on bubble characteristics of flotation column in hematite reverse cationic flotation process
Autorzy:: Wang, Weizhi
Han, Jikang
Powiązania:: https://bibliotekanauki.pl/articles/1450070.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: column flotation
bubble generator
GE-609
circularity
bubble diameter
bubble Sauter diameter
Opis:: In the self-designed flotation column simulation system, the foaming characteristics of the micro-bubble countercurrent contact flotation column used in the hematite cation column flotation process are systematically studied. The objective of this study is to investigate the bubble generation by a bubble generator in the flotation column. The bubble image was obtained by the high-speed camera recorder, and the bubble diameter was calculated and analyzed by image processing software. The distribution characteristics of the bubble size under different aeration conditions and with different reagent concentrations were investigated. The results show that as the aeration increases, the average diameter bubbles increases, the bubble size distribution changes from narrow to wide, and the number of small bubbles decreases. The cationic collector GE-609 can change the bubble shape. As the concentration increases, the bubble shape gradually changes from an irregular shape to a standard spherical shape. When the concentration of GE-609 exceeds 2.5 mg/dm3, the average circularity C of the bubbles in the bubble group stabilizes at 1, and the increase in concentration no longer changes the bubble shape. GE-609 also has an efficient foaming effect, as the concentration increases, the bubble diameter distribution changes significantly, the proportion of small bubbles increases, and the proportion of large bubbles decreases significantly. When the critical concentration is exceeded, the bubble diameter distribution probability density peak width no longer changes significantly. Compared with the two types of alcohol foaming agents, GE-609 produces a bubble Sauter diameter close to that of 2-octanol and slightly lower than terpineol.
Źródło:: Physicochemical Problems of Mineral Processing; 2020, 56, 1; 64-75
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Artificial neural network (ANN) modelling to estimate bubble size from macroscopic image and object features
Autorzy:: Vinnett, Luis
León, Roberto
Mesa, Diego
Powiązania:: https://bibliotekanauki.pl/articles/29552038.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: machine learning
artificial neural network
flotation
bubble size
Sauter diameter
Opis:: Bubble size measurements in aerated systems such as froth flotation cells are critical for controlling gas dispersion. Commonly, bubbles are measured by obtaining representative photographs, which are then analyzed using segmentation and identification software tools. Recent developments have focused on enhancing these segmentation tools. However, the main challenges around complex bubble cluster segmentation remain unresolved, while the tools to tackle these challenges have become increasingly complex and computationally expensive. In this work, we propose an alternative solution, circumventing the need for image segmentation and bubble identification. An Artificial Neural Network (ANN) was trained to estimate the Sauter mean bubble size (D32) based on macroscopic image features obtained with simple and inexpensive image analysis. The results showed excellent prediction accuracy, with a correlation coefficient, R, over 0.998 in the testing stage, and without bias in its error distribution. This machine learning tool paves the way for robust and fast estimation of bubble size under complex bubble images, without the need of image segmentation.
Źródło:: Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 185759
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Bubbling properties of frothers and collectors mix system
Autorzy:: Batjargal, Khandjamts
Guven, Onur
Ozdemir, Orhan
Karakashev, Stoyan I.
Grozev, Nikolay A.
Boylu, Feridun
Çelik, Mehmet Sabri
Powiązania:: https://bibliotekanauki.pl/articles/2146880.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: critical coalescence concentration (CCC)
Sauter diameter (d32)
bubble size distribution (BSD)
Opis:: This paper studies the effect of the type and concentration of selected frothers and collectors mix system on the bubble sizes (Sauter mean diameter, SMD) of bubbling flow produced in a micro flotation cell and the determination of bubble size distribution (BSD). The usage of dodecyl amine hydrochloride (DAH) collector on the critical coalescence concentration of commercial frothers PPG200, PPG400, and PPG600 was investigated in detail. The results of these studies showed that the usage of DAH decreased the CCC of these frothers. Each frother + collector mixing system exhibited its unique ability in preventing coalescence of the bubbles in the order of PPG200 < PPG400 < PPG600. The factorial experiments established that the type of the frother, collector, and their concentration had a major effect on the size of the bubbles. The BSD in the presence of PPG600 + DAH mix system resulted in a little bit wider BSD which indicated the effect of frother type in mixed systems.
Źródło:: Physicochemical Problems of Mineral Processing; 2022, 58, 5; art. no. 152890
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analiza wpływu wirującego pola magnetycznego na układ dyspersyjny gaz - ciecz
Experimental study of gas - liquid disperse system exposed to rotating magnetic field
Autorzy:: Rakoczy, R.
Powiązania:: https://bibliotekanauki.pl/articles/2070667.pdf
Data publikacji:: 2009
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: rozkład średnicy pęcherzy
średnica Sautera
wirujące pole magnetyczne
bubble size distributions
Sauter diameter
rotating magnetic field
Opis:: W pracy przedstawiono wyniki badań układów gaz — ciecz w nowym typie urządzenia wykorzystującym wirujące pole magnetyczne. Przeanalizowano wpływ parametrów fizycznych fazy ciągłej oraz parametrów operacyjnych na stan układu dyspersyjnego. Analizę oparto na przedstawieniu zmian średniej średnicy Sautera w zależności od bezwymiarowych liczb Mortona oraz Hartmana.
Gas - liquid systems under the action of rotating magnetic field in a novel type column were studied. In this contribution an influence of operating conditions and physical properties of liquid continuous phase on dispersed phase are discussed. Specifically, the Sauter mean bubble diameter is determined as a function of the dimensionless Morion and Hartman numbers.
Źródło:: Inżynieria i Aparatura Chemiczna; 2009, 6; 160-161
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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