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    Wyświetlanie 1-2 z 2
    Tytuł:
    The effect of rotational speed of the drum on physical properties of granulated compost fertilizer
    Autorzy:
    Ghasemi, Y.
    Kianmehr, M. H.
    Mirzabe, A. H.
    Abooali, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/109863.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    drum granulation
    compost fertilizer
    drum
    rotational speed
    fracture force
    granule size
    granule mass
    Opis:
    Granulation is one of the fundamental operations in particulate processing which has an ancient history and a widespread use. Compost fertilizer was granulated using drum granulation method under different level of drum rotational speed. Rotational speed of the drum (ω) ranged from 40 to 60 rev min–1 (40, 45, 50, 55 and 60 rev min–1). The effect of rotational speed of the drum (ω) on some physical properties of granulated compost fertilizer including: useful granules, granules size, fracture force, mass of the granules, bulk density, angle of friction and angle of repose are investigated in the present study.Results indicated that with the increasing drum rotational speedthe percentage of useful granules, fracture force, bulk density, angle of friction and angle of reposeincrease from 69.91% to 80.88%, 34.35 N to 35.23 N, 743.23 to 765.08 kg m–3, 26.50 to 28.01º and 10.83 to 12.88º, respectively. Also the average size of granules decreases from10.15 to 7.05 mm.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 2; 743-755
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel dry granule preparation technology and comparison of granule properties with conventional wet system for ceramic tiles production
    Autorzy:
    Ergin, Hasan
    Taşkıran, Mehmet Uğur
    Pilevne, Ahmet Atınç
    Turgut, Hatice
    Kayacı, Kağan
    Powiązania:
    https://bibliotekanauki.pl/articles/24148612.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ceramic tile
    dry granulation
    energy consumption
    granule characteristics
    Opis:
    The ceramic tile manufacturing process uses a lot of energy, mainly thermal energy, and to a lesser extent electric energy. Total energy costs account for between 50% and 55% of average direct manufacturing costs. Fossil fuel combustion, such as natural gas combustion, produces carbon dioxide emissions. Therefore, energy consumption and emissions issues are vitally important for both environmental effects and process costs in ceramic tile manufacturing. The wet process of granule production systems including wet grinding and spray drying is widely used for the production of granules. Although there is high energy consumption for the water evaporation in the spray dryer, it ensures to produce high quality tile for many years. In this study, important granule properties were introduced for a novel dry granule production system. In the successful application of a dry granulation system, the conformity of produced granules is vitally important such as particle size distribution, bulk density, flow properties, and moisture of granules and conformity for the pressing process. This paper includes the comparative studies for properties of granules produced in spray dryer and new dry granule preparation systems and the full results of the industrial trials with these granules. The cost comparison of both granule production systems was also made for the same raw material usage. The natural gas consumption and water consumption were reduced respectively from 46 to 15 m3/ton and from 540 to 95 liters/ton in the new dry granulation system while electricity consumption and maintenance costs remain almost the same in both systems.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 167498
    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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