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    Wyświetlanie 1-3 z 3
    Tytuł:
    A quick method for Bond work index approximate value determination
    Autorzy:
    Todorovic, D.
    Trumic, M.
    Andric, L.
    Milosevic, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/110265.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Bond work index
    grinding
    kinetics
    Opis:
    The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial comminution plants designing. Determining the Bond work index value is quite complicated, time-consuming and requires trained operating personnel and therefore is subjected to errors. A quick method for the Bond work index approximate value determination, which is based on the first order grinding kinetics, is presented in this paper. Comparative experiments for the Bond work index value determination using the standard and quick procedures were carried out on samples of limestone and andesite, and on composite samples containing both ores in different mass proportions. This quick procedure can be performed with an arbitrary number of milling cycles, depending on the desired accuracy.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 321-332
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill
    Autorzy:
    Andric, L.
    Terzic, A.
    Acimovic-Pavlovic, Z.
    Pavlovic, L.
    Petrov, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/110391.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    talc
    mechanical activation
    ultra fine grinding
    ultra-centrifugal mill
    attrition mill
    Opis:
    The efficiency of talc mechanical activation by means of two different mechano-activators - centrifugal and attrition mill is investigated in this study and the comparative analysis of the characteristics of obtained talc powders is presented. A new approach for obtaining high-grade talc concentrate with low Fe2O3 content is achieved through effect of mechanical activation of talc accompanied by hydrometallurgical process. The applied mechanical activation process conditions of ultra-centrifugal mill were defined by number of rotor revolutions, sieve mesh size, and current intensity. These operating parameters of the ultra-centrifugal mill were variable. Ultra fine grinding of talc in attrition mill (attritor) was carried out in various time intervals - from 5 to 15 min. The following technological parameters of the mechanical activation were monitored: time of mechanical activation, circumferential rotor speed, capacity of ultra-centrifugal mill, and specific energy consumption. The investigation was based on a kinetic model. The structure and behavior of activated samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and differential thermal analysis (DTA).
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 2; 433-452
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved method for passive ranging based on surface estimation of an airborne object using an infrared image sensor
    Autorzy:
    Mikluc, D. L.
    Andric, M. S.
    Mitrovic, S. T.
    Bondzulic, B. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/174208.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    infrared sensor
    passive ranging
    pixel filtration
    distance estimation
    Opis:
    A new method for passive ranging using image size measurements from one sensor has been presented. The method relies on pixel filtration with histogram-based thresholding, followed by intensity and gradient magnitude analysis. Its efficiency and robustness were assessed in real infrared surveillance sequences, and it has proved to lead to better results than non-filtering techniques. The object distance estimation mean relative error does not exceed 3%, which implies that the suggested method enables precise range estimation based on object size measurements. To maximize the benefits of the suggested method, Kalman filter has been included in the algorithm in order to overcome fluctuations of the estimated object size.
    Źródło:
    Optica Applicata; 2017, 47, 3; 383-394
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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