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    Wyświetlanie 1-4 z 4
    Tytuł:
    Zdolność płynięcia materiałów proszkowych
    Flowability of powders
    Autorzy:
    Leś, Karolina
    Powiązania:
    https://bibliotekanauki.pl/articles/2200421.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    materiały proszkowe
    zdolność płynięcia
    poprawa sypkości
    wskaźnik sypkości
    testery sypkości
    powders
    powder flow
    flowability improvement
    flowability indices
    flowability testers
    Opis:
    Powders are an important group of materials used as substrates and products in chemical and related industries. Due to their cohesiveness there is a serious problem with storage, handling and processing. In this review flowabilty as an important property of powders was discussed and operational problems caused by insufficient powder flow were presented. The popular methods of powder flowability improvement were reviewed. The techniques of powder flow evaluation with particular emphasis on new proposals and modifications of existing methods were also presented.
    Źródło:
    Wiadomości Chemiczne; 2023, 77, 3-4; 257--272
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prospective Application of Response Surface Methodology for Predicting High-Energy Mixing Process Conditions towards Fine Powders Flow Improvement
    Autorzy:
    Leś, Karolina
    Opaliński, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2024154.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    dry coating
    powder flowability
    high energy mixing
    planetary ball mill
    response surface methodology
    powlekanie na sucho
    sypkość proszku
    mieszanie wysokoenergetyczne
    planetarny młyn kulowy
    Opis:
    Planetary ball mill was proposed as an intensive high-energy mixer to obtain flowability improvement of industrially exploited, cohesive and finely comminuted powders via dry coating. Response surface methodology (RSM) coupled with central composite rotatable design (CCRD) was applied as an effective method for the prediction of high-energy mixing conditions. The use of this procedure allows identifying relatively narrow ranges of high-energy mixing parameters (rotating speed of planetary ball mill and mixing time) and the amount of additives used (nanosilica and isopropyl alcohol) providing substantial improvement of the flowability of Aluminium hydroxide (Apyral) and Calcium carbonate powders. In order to find the optimal values of the process parameters, enabling to obtain the lowest values of flowability indices (angle of repose, compressibility index), the desirability function approach was applied. The obtained results may be a basis for developing a general routine allowing mixing parameters to be successfully predicted regarding some physical properties of powders only with no experiments needed.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 1; 134-143
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Practical guidelines for predicting the proper conditions of high-energy mixing in a planetary ball mill towards powder flow improvement
    Autorzy:
    Leś, Karolina M.
    Opaliński, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2202878.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dry coating
    powder flowability
    high-energy mixing
    planetary ball mill
    response surface
    methodology
    sucha powłoka
    sypkość proszku
    mieszanie wysokoenergetyczne
    planetarny młyn kulowy
    powierzchnia odpowiedzi
    metodologia
    Opis:
    In this work Response Surface Methodology and Central Composite Rotatable Design were applied to find high-energy mixing process parameters enabling flow properties of highly cohesive Disulfiram powder to be improved. Experiments were conducted in a planetary ball mill. The response functions were created for an angle of repose and compressibility index as measures of powder flowability. To accomplish an optimisation procedure of mixing process parameters according to a desirability function approach, the results obtained earlier for potato starch, as another cohesive coarse powder, were also employed. Coupling these results with those achieved in a previous work, it was possible to develop some guidelines of practical importance allowing mixing conditions to be predicted towards flow improvement of fine and coarse powders.
    Źródło:
    Chemical and Process Engineering; 2022, 43, 3; 419--433
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on Moisture Effects on Powder Flow and Mechanochemical Improvement of Powder Flowability
    Autorzy:
    Opaliński, Ireneusz
    Chutkowski, Marcin
    Stasiak, Mateusz
    Leś, Karolina
    Olechowski, Marcin
    Przywara, Mateusz
    Powiązania:
    https://bibliotekanauki.pl/articles/2023857.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    powder flow
    moisture content
    mechanochemistry
    DEM
    Opis:
    Recent findings on some unsolved powder rheology problems and new challenges regarding mechanochemical powder processing and flow modelling are presented. There is remarkable difference in rheology when processing moist powders in static or dynamic conditions. Despite of regular trends of shear stress changes with humidity found in the both cases, some exceptions revealed the significant impact of particles size and their hygroscopic nature as example. Mechanochemical methods of high-energy interactive mixing of highly cohesive powders doped with nano-sized solid admixture enabled their flowability to be improved considerably. Using statistical approach, more general routine is proposed that allow the optimal mixing parameters to be reliably predicted with limited number of experiments needed. Ability to flow of some hygroscopic powders was examined with DEM method and extreme sensitivity of model output to input particle properties was found. The common DEM routine towards powder flow prediction is therefore suggested to be replaced with approach featuring in using DEM method to identify some unknown powder flow factors.
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 2; 228-246
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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