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    Wyświetlanie 1-3 z 3
    Tytuł:
    Reducing entrainment of sericite in fine flaky graphite flotation using polyaluminum chloride
    Autorzy:
    Qiu, Yangshuai
    Zhang, Lingyan
    Sun, Kangkang
    Li, Ye
    Qian, Yupeng
    Powiązania:
    https://bibliotekanauki.pl/articles/109740.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fine flaky graphite
    sericite
    polyaluminum chloride (PACl)
    dispersion
    aggregation
    Opis:
    Polyaluminum chloride (PACl) was introduced as a flocculant to reduce the entrainment of sericite gangue in fine flaky graphite flotation. The dispersion and aggregation behaviours of sericite and fine flaky graphite in the absence and presence of PACl were studied by settling experiments and verified by optical microscope images. Results of batch flotation tests for artificial mixtures indicated that the addition of PACl decreased the recovery of sericite gangue and the water recovery. Zeta potential measurements, FTIR and XPS analyses revealed that PACl selectively aggregated sericite particles in terms of charge neutralization and precipitate enmeshment.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 5; 1108-1119
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective flotation of witherite from calcite using potassium chromate as a depressant
    Autorzy:
    Qiu, Yangshuai
    Zhang, Lingyan
    Jiao, Xuan
    Guan, Junfang
    Li, Ye
    Qian, Yupeng
    Powiązania:
    https://bibliotekanauki.pl/articles/110784.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    witherite
    calcite
    selective flotation
    sodium oleate
    potassium chromate
    Opis:
    Witherite has been widely used as an industrial and environmental source of barium, with calcite being the primary associated carbonate mineral. However, few studies have been conducted to effectively concentrate witherite from barium ores. In this work, with the treatment of potassium chromate (K2CrO4) and sodium oleate (NaOL), witherite was selectively separated from calcite through selective flotation at different pH conditions. In addition, contact angle, Zeta potential, adsorption and X-ray photoelectron spectroscopy measurements were performed to characterize the separation mechanisms. The results demonstrated that NaOL had a strong collecting ability for both witherite and calcite; nevertheless, witherite could be effectively selected from calcite with the highest recovery at pH 9 in the presence of K2CrO4. From the XPS measurements, NaOL and K2CrO4 were found to be primarily attached to the surfaces of witherite and calcite through chemisorption. The presence of K2CrO4 on the surface of calcite adversely influenced the NaOL adsorption, which could make the flotation separation efficient and successful.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 2; 565-574
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Understanding the collection behavior of gangue minerals in fine flake graphite flotation
    Autorzy:
    Xu, Wenlu
    Sun, Kangkang
    Qiu, Yangshuai
    Zhang, Lingyan
    Yang, Luo
    Wei, Shaowei
    Ding, Dafa
    Powiązania:
    https://bibliotekanauki.pl/articles/2146848.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    flake graphite
    mica
    quartz
    flotation
    entrainment
    Opis:
    Flotation is one of the most common and effective methods for the beneficiation of natural graphite resources. However, the upgrading efficiency of flotation is always finite due to the undesirable collection of gangue minerals. In this work, the collecting mechanism of three typical gangue minerals, including mica, quartz, and feldspar, in fine flake graphite flotation was investigated. Results of batch flotation tests for single-minerals and artificial mixtures confirmed the enhanced collection of gangues in the presence of graphite particles. Contact angle and zeta potential results and theoretical calculations of the interaction between graphite and gangue particles based on typical DLVO theory indicated that it is impossible to collect gangue minerals by true flotation or through heterocoagulation with graphite particles. The fitting results of accumulated gangue recoveries and accumulated water recoveries using the Warren method demonstrated that most gangue minerals entered the concentrate through entrainment, with a small proportion by bubble inclusions.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 1; 101--112
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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