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    Wyświetlanie 1-2 z 2
    Tytuł:
    Selective comminution and grinding mechanisms of spent carbon anode from aluminum electrolysis using ball and rod mills
    Autorzy:
    Ni, Chao
    Zhou, Shaoqi
    Gao, Jixuan
    Bu, Xiangning
    Chen, Yuran
    Alheshibri, Muidh
    Xie, Guangyuan
    Li, Biao
    Powiązania:
    https://bibliotekanauki.pl/articles/2146907.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    selective comminution
    ball mill
    rod mill
    spent carbon anode
    grinding mechanizm
    Opis:
    The recovery of spent carbon anode (SCA) materials plays important roles in environment protection and resources recycling, while this cannot be efficiently achieved without liberation. In this study, grinding characteristics of spent carbon anode from aluminum electrolysis in both ball mill and rod mill were analyzed, and compared based on the utilization of the selective Fuerstenau upgrading curves. In addition, the different grinding mechanisms of ball and rod milling were evaluated by analyzing the shape factor and surface roughness of the ground samples. Results of mineralogical characterizations indicated that carbon particles (d50 = 46.86 μm) presented in the SCA were closely associated with cryolite particles. At 5 min grinding time, the maximum selective comminution factor (β) values of ball milling and rod milling were 2.00 and 1.63, respectively, indicating a higher degree of selective comminution of SCA was achieved from ball milling. Comparisons of the valuable component content (cv, cum) of -125 μm ground particles and the shape characterizations of 74–125 μm ground particles generated from ball and rod milling manifest that a direct relationship exists between the degree of selective comminution and the grinding mechanism.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 3; art. no. 145667
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dzieło człowieka pod opieką Boga. Wiatrak z Gryżyny: najstarszy zachowany młyn wietrzny w Polsce i jego symboliczne przesłanie. Wprowadzenie do szerszych rozważań.
    Human artifact under Gods protection. A windmill from Gryżyna: the oldest remaining windmill in Poland and its symbolic message. An Introduction to broader reflections
    Autorzy:
    Wyrwa, Andrzej Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/532106.pdf
    Data publikacji:
    2018
    Wydawca:
    Muzeum Pierwszych Piastów na Lednicy
    Tematy:
    wiatrak
    młyn wietrzny
    Gryżyna
    Kościan
    dendrochronologia wiatraka
    personifikacja młynów wietrznych
    psalm 27(28)
    Gułtowscy (ród)
    Wierusz--Kowalscy (ród)
    Muzeum Pierwszych Piastów na Lednicy
    a post mill
    a windmill
    windmill’s dendrology
    the Gułtowscy family
    the Wierusz-Kowalscy family
    the Museum of the First Piasts at Lednica
    Opis:
    This synthetic article presents reflections concerning the oldest windmill — a windmill on the Polish land, i.e. a post mill (‘koźlak’) from Gryżyna (Kościan municipality, Wielkopolskie voivodeship), which was moved from Gryżyna (fig. 2 and 5) in 1964/1965 to the Museum of the First Piasts at Lednica, and its so-called ‘small skansen’ area. In 2017 the funds from The Ministry of Culture and National Heritage allowed a thorough preservation and renovation, and a post mill regained the look from the 18th and 19th centuries (fig. 9). On this windmill’s crown tree a 1585 date (fig. 11, 12) and Latin inscription [ADI]VTOR ET PROTECTOR MEVS ES TV DO[M]I[N]E; signum G, a Latin cross and a carpenter’s sign (fig. 11, 12, 17) were inscribed. The second date was inscribed on a tail beam — 1792 (fig. 14). In order to verify these dates, a dendrological research of an oaken main post (vertical axis) and east and west pine quarterbars was conducted. A broader historical and genealogical research, which unequivocally confirmed 1585 as the time when the windmill was built and its renovation in 1792, was also conducted. These two events were independently credited to the people who accomplished them. The windmill was built in the times of Łukasz Gułtowski and his son Wacław, while a renovation from the 18th century was conducted aft er Gryżyna was bought back by the Wierusz-Kowalski family. A beautiful Latin inscription, which is a paraphrasis of the 27(28) David psalm, gave the windmill under God’s protection (fig. 17). In the context of the content of this inscription, a broad symbolism of the windmills was illustrated in this study.
    Źródło:
    Studia Lednickie; 2018, 17; 27-62
    0860-7893
    2353-7906
    Pojawia się w:
    Studia Lednickie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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