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Wyszukujesz frazę "Zheng, Yong" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Application of a biconical dense medium cyclone to pre-treat a low-grade Pb-Zn sulfide ore
Autorzy:
Jian, Sheng
Sun, Wei
Zheng, Yong-xing
Powiązania:
https://bibliotekanauki.pl/articles/110536.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Pb-Zn sulfide ore
Low-grade ore
Pretreatment
Biconical dense medium cyclone
Opis:
A biconical dense medium cyclone (BDMC) was applied to reject the gangue from a low-grade Pb-Zn sulfide ore for the first time. Based on mineralogy and heavy liquid separation tests, it was found that the rejection of gangue by the BDMC prior to grinding and flotation was promising. The results revealed that the particle size clearly affected the heavy liquid separation process. The effects of several parameters, such as medium specific gravity (SG), spigot diameter, tilt angle, cone angle and medium/ore mass ratio, on the yield of floats and on the metal recoveries in the floats were examined and the optimal parameters were determined. The results showed that 51.22% of floats were obtained with a lead recovery of 7.92% and a zinc recovery of 12.50%. The extended tests were further carried out with the BDMC being capable of throughputs about 3 t/h, which verified the results obtained in the laboratory experiments. The use of this equipment to pre-treat the refractory ore is promising.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 4; 981-990
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on surface modification of cerussite by thermochemical processing with pyrite
Autorzy:
Zheng, Yong-Xing
Ning, Ji-Lai
Xie, Haiyun
Lv, Jin-Fang
Hu, Pan-Jin
Pang, Jie
Powiązania:
https://bibliotekanauki.pl/articles/1448573.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
cerussite
pyrite
surface modification
thermochemical processing
flotation
Opis:
In this paper, surface modification of cerussite by thermochemical processing with pyrite was studied based on microflotation tests, X-ray powder diffractometry (XRD), X-ray photoelectron spectroscopy (XPS) and electron probe microanalysis (EPMA). Microflotation test results showed that the surface modification facilitated flotation of the treated cerussite and improved the flotation recovery to approximately 90%. The results of XRD analyses confirmed that cerussite was transformed into massicot, which then interacted with pyrite to form $PbS$, $PbSO_4$, $PbO•PbSO_4$ and $4PbO•PbSO_4$. XPS analyses results revealed that both $PbS$ and $PbS_2$ were formed on the mineral surface, and the percentage of $PbS$ increased with increasing $FeS_2$/$PbCO_3$ (F/P) mole ratio, which was advantageous for the flotation of the modified cerussite. EPMA analyses showed that particles with layered configurations were obviously formed after thermochemical processing. The thickness of the products at the outer layer of the particles increased when the F/P mole ratio increased. Moreover, the S and O contents in the products increased and decreased, respectively.
Źródło:
Physicochemical Problems of Mineral Processing; 2021, 57, 1; 156-167
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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