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Wyszukujesz frazę "liberation degree" wg kryterium: Temat

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Effect of crushing type on the efficiency of flowing film separation
    Autorzy:
    Sirkeci, A. A.
    Gul, A.
    Bulut, G.
    Ozer, M.
    Guven, O.
    Perek, K. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/109918.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    particle shape characteristics
    liberation degree
    chromite
    shaking table
    Opis:
    In recent years, the influence of different crushing systems (compression, impact, attrition) has been receiving more attention due to their significant role on particle liberation and shape of particles. The objective of this study was to investigate the effects of different crushing systems on both liberation degree and shape factors of chromite particles along with their enrichment conditions by shaking table. The tests were conducted on -1+0.5, -0.5+0.212 and -0.212 mm size fractions using the Wilfley type shaking table. The results of these tests showed that concentrates with higher metal contents were obtained by impact crushing of chromite in proportion to higher liberation degree and roundness of particles. Therefore, it was found that selective breakage can well be obtained by impact crushing in all fractions. The results of this study demonstrated the importance of crushing type on the liberation and enrichment processes.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 2; 601-608
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The relationships between the kinetic grinding parameters with interstitial fillings and the liberation degree of a chromite ore
    Autorzy:
    Umucu, Yakup
    Deniz, Vedat
    Gursoy, Hakan Y.
    Tokcan, Isıl
    Arsoy, Zeyni
    Powiązania:
    https://bibliotekanauki.pl/articles/24148630.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    grinding
    ball mill
    kinetic model
    liberation degree
    interstitial filling
    Opis:
    In this study, the relationships between the liberation degree and the kinetic breakage parameters of a chromite ore obtained from the Burdur (Türkiye) were examined under the laboratory conditions. Firstly, liberation degrees for chromite particles were determined by the particle counting method in a metal microscope for 4 different size groups. Secondly, the breakage parameter of chromite ore which was dry ground with a ball mill was obtained using standard test methods. Additionally, the model parameters were also determined for the fractional interstitial fillings (U) of the chromite sample. Thirdly, the kinetic grinding parameters were compared with the liberation degree of the chromite sample. As a result of the tests, a very good correlation was obtained with R2=0.998, and regression analysis in the grinding processing of the chromite ore was used to verify the validity of the relationship parameter of Si that was produced. To these, it was found that interstitial fillings (U=0.6, 0.8, 1.0, and 1.2) have an effect on the grinding.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 168254
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comminution behavior and mineral liberation characteristics of low-grade hematite ore in high pressure grinding roll
    Autorzy:
    Cao, Jincheng
    Liu, Lei
    Han, Yuexin
    Feng, Ansheng
    Powiązania:
    https://bibliotekanauki.pl/articles/110727.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    low-grade hematite ore
    high pressure grinding roll
    comminution behavior
    degree of liberation
    Opis:
    The comminution process and mechanism of low-grade hematite ore in a high pressure grinding roll (HPGR) were investigated in this work. Three different methods were used for comminution of the hematite ore: HPGR with an air classifier, HPGR with screening followed by ball milling (HPGR+BM), and cone crushing with screening followed by ball milling (CC+BM). In addition, the effects of comminution methods on the degree of liberation of minerals in the grinding products were compared. The results suggest that the comminution process of the ore can be divided into four stages: appearance of tiny cracks, expansion of tiny cracks, which eventually form microcosmic cracks, development of principle cracks, and generation of the conjugate fracturing zone. Intergranular cracks, including partial intergranular cracks and complete intergranular cracks, are apparent in the comminution products of the HPGR. The complete intergranular cracks mainly occur in the conjugate fracturing zone, while the partial intergranular cracks within the particles result in an abundance of locked-particles in the comminution products. Furthermore, the degree of liberation of minerals is more influenced by the final grinding mode rather than the crushing method. It is found that complete intergranular cracks in the conjugate fracturing zone play a significant role in increasing the degree of liberation of iron minerals in the fine size fraction. The “mosaic-type” locked-particles have negligible effect on the liberation properties of iron minerals during the subsequent grinding process.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 2; 575-585
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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