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Wyszukujesz frazę "batch flotation" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
The impact of batch flotation tests on the industrial plant prediction
Autorzy:
Vallejos, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/24603655.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
batch flotation
rougher banks
standard protocol
operating condition
Opis:
To predict the metallurgical results of industrial plants, laboratory batch flotation tests are carried out, relating both operations through scale-up factors. However, robust scale-up procedures and well-defined laboratory protocols are necessary to reach reliable results at industrial scale. In this paper, results from different flotation batch tests are presented, analysing the effect of batch protocol in terms of operating conditions, operator, ore type, water quality, and others on the metallurgical response. Additionally, the ability of batch responses to describe industrial operations and determine scale-up factors was analysed. Then, a sensitivity analysis was carried out, considering the effect of batch and industrial conditions on the estimation of scale-up factors. Results showed that the batch response significantly changes, depending on the operating conditions, flotation operator, and batch flotation machine, even for the same cell design. Additionally, it was observed that the batch recovery significantly changes when modifying ore type and water quality, which can cause changes in batch and/or industrial operation, affecting the scale-up factors. In addition, results showed that the scale-up factors varied significantly by changing operating conditions in a batch cell. This also occurs in plants when metallurgical performance changes, for example, due to a modification in launder design and/or operating condition, to increase recovery, or due to control limitations that prevent efficient metallurgical performance.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 177609
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oil-assisted flotation of fine hematite using sodium oleate or hydroxamic acids as a collector
Autorzy:
Li, H.
Liu, M.
Liu, Q.
Powiązania:
https://bibliotekanauki.pl/articles/109749.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
hematite
sodium oleate
kerosene
Batch Flotation
Octyl hydroxamic acid
Oleoyl hydroxamic acid
Opis:
Micro-flotation and batch flotation tests were carried out on fine (-20 µm) hematite to investigate the influences of non-polar oil when sodium oleate, octyl hydroxamic acid, or oleoyl hydroxamic acid was used as a collector. Both micro-flotation and batch flotation tests were performed using single hematite mineral and/or artificial mixed minerals (hematite:quartz = 1:1), and kerosene was utilized as the neutral oil. The experimental results showed that the addition of a kerosene emulsion benefited hematite recovery in the micro-flotation tests where a froth layer did not exist. In the batch flotation where a froth layer existed, kerosene behaved differently when used in conjunction with the three collectors. Kerosene helped improve the batch flotation when sodium oleate or oleoyl hydroxamic acid was used as a collector. However, it reduced concentrate weight yield, grade and recovery to a noticeable extent when octyl hydroxamic acid was used as a collector, especially at low dosages. In addition, single hematite batch flotation kinetics tests coupled with water recovery measurement were carried out to study the role of kerosene at different collector dosages. It was observed that water drainage and the resulting froth destabilization by kerosene was dominant at low collector dosages, especially in the flotation using octyl hydroxamic acid. At higher collector dosages, the water drainage and froth destabilization effect by kerosene was possibly counter-balanced by the higher hematite surface hydrophobicity and bubble surface tension gradient, which led to more stable froth layer.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 4; 1130-1145
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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