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Wyświetlanie 1-2 z 2
Tytuł:
Mechanism of ultrasonic cavitation to improve the effect of siderite on quartz flotation
Autorzy:
Yin, Wanzhong
Cai, Lizheng
Ma, Yingqiang
Wang, Ying
Powiązania:
https://bibliotekanauki.pl/articles/24085972.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ultrasound treatment
cover
fine siderite
CaCO3 precipitate
Opis:
In order to effectively eliminate the effect of fine carbonate minerals on quartz flotation, the influence of fine siderite on quartz flotation was studied as well as the mechanism or role of ultrasonic treatment in the process. The results of adsorption capacity measurement and flotation solution chemical calculation show that fine siderite and its dissolved components have a great influence on the collector consumption and the surface properties of quartz. In addition, SEM, EDS and XPS analysis were used to study the surface morphology and chemical environment changes of quartz with and without ultrasonic treatment. The results of flotation test show that the recovery of quartz increase from 38.79% to 58.38% under the condition that ultrasonic time was 0.5 min and ultrasonic power was200 W. The mechanical effect caused by ultrasonic cavitation can clean the quartz surface to a certain extent and increase its active sites, thus improving the floatability of quartz.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 165930
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mechanism of $CaCO_3$ in the gas-based direct reduction of a high-phosphorus oolitic iron ore
Autorzy:
Wu, Shichao
Li, Zhengyao
Sun, Tichang
Kou, Jue
Xu, Chengyan
Powiązania:
https://bibliotekanauki.pl/articles/1446124.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
high-phosphorus oolitic iron ore
gas-based direct reduction
magnetic separation
$Fe_3PO_7$
$CaCO_3$
Opis:
Gas-based direct reduction and magnetic separation process was applied in treating a high-phosphorus oolitic iron ore, of which phosphorus mainly occured as $Fe_3PO_7$ and apatite. The mechanism of $CaCO_3$ was investigated using XRD, SEM-EDS, and mineral phase analysis. Results showed that when no CaCO3 was added, most of the iron minerals were reduced to metallic iron, while $Fe_3PO_7$ was reduced to elemental phosphorus and mixed with the metallic iron particles. When a small amount of $CaCO_3$ was added, $CaCO_3$ preferentially reacted with $SiO_2$, $Al_2O_3$ and other components, preventing them from reacting with FeO and resulting in the increase of iron recovery. When the amount of $CaCO_3$ reached 25%, apatite was produced from the reaction of CaO and $Fe_3PO_7$, which could be later removed by grinding and magnetic separation.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 4; 117-124
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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