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    Wyświetlanie 1-7 z 7
    Tytuł:
    Recovery Of Nickel From Spent Nickel-Cadmium Batteries Using A Direct Reduction Process
    Odzysk niklu z zużytych baterii niklowo-kadmowych za pomocą bezpośredniej redukcji
    Autorzy:
    Shin, D. J.
    Joo, S.-H.
    Wang, J.-P.
    Shin, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355948.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    spent nickel-cadmium batteries
    direct reduction
    recycling
    heat treatment
    zużyte baterie niklowo-kadmowe
    redukcja bezpośrednia
    recykling
    obróbka cieplna
    Opis:
    Most nickel is produced as Ferro-Nickel through a smelting process from Ni-bearing ore. However, these days, there have been some problems in nickel production due to exhaustion and the low-grade of Ni-bearing ore. Moreover, the smelting process results in a large amount of wastewater, slag and environmental risk. Therefore, in this research, spent Ni-Cd batteries were used as a base material instead of Ni-bearing ore for the recovery of Fe-Ni alloy through a direct reduction process. Spent Ni-Cd batteries contain 24wt% Ni, 18.5wt% Cd, 12.1% C and 27.5wt% polymers such as KOH. For pre-treatment, Cd was vaporized at 1024K. In order to evaluate the reduction conditions of nickel oxide and iron oxide, pre-treated spent Ni-Cd batteries were experimented on under various temperatures, gas-atmospheres and crucible materials. By a series of process, alloys containing 75 wt% Ni and 20 wt% Fe were produced. From the results, the reduction mechanism of nickel oxide and iron oxide were investigated.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1365-1370
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the Estimation of Fatigue Crack Initiation Life of H62 Brass
    Autorzy:
    Zheng, M.
    Zhang, S.
    Peng, Xiao Jian
    Wang, Yi
    Powiązania:
    https://bibliotekanauki.pl/articles/2048866.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    strain energy density
    fatigue damage strain
    theoretical strain fatigue limit
    fatigue crack initiation
    life prediction
    Opis:
    In the present paper, the excavation of the energetic approach that estimates the fatigue crack initiation life of metal is conducted for H62 brass. The benefit of the energetic approach is the division of the actual applied strain range Δε into two parts, that is, a damage strain range Δεd that induces fatigue damage within the metal, and an undamaged strain range Δεc, which does not produce fatigue damage of the metal and corresponds to theoretical strain fatigue limit. The brightness of this approach is that the undamaged strain range Δεc can be estimated by the fundamental conventional parameters of metal in tensile test. The result indicated that the fatigue crack initiation life of H62 brass can be estimated by this approach successfully.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 1; 31-35
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study On The Fabrication Of Iron Powder From Forging Scale Using Hydrogen
    Próby wytwarzanie proszku żelaza metodą redukcji zgorzeliny pochodzącej z procesów kucia za pomocą wodoru
    Autorzy:
    Shin, S. M.
    Lee, D.-W.
    Yun, J.-Y.
    Kang, Ch.-Y.
    Wang, J.-P.
    Powiązania:
    https://bibliotekanauki.pl/articles/350946.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    forging scale
    hydrogen partial pressure
    hematite
    iron powder
    kucie za pomocą wodoru
    hematyt
    redukcja zgorzeliny
    proszek żelaza
    Opis:
    This study was conducted to investigate the effect of hydrogen content, temperature, reaction time for the reduction of forging scale which is mainly composed of hematite (Fe2O3). All reductive reactions were performed over the temperature range of 700 to 1200°C as well as 0.1 to 1 atm of hydrogen partial pressures. The results showed that the mechanism for the reduction of iron oxides using hydrogen gas was not a simple process, but proceeded in multiple reduction stages thermodynamically. The iron oxide was almost completely reduced to metallic iron powder with 91 wt.% of iron content in the forging scale at 0.1 atm of hydrogen partial pressure. The content of iron was however found to be increased with increasing hydrogen partial pressure from 0.1 to 1 atm with regardless of temperatures. The metallic iron powder was obtained with the mean size of 100 μm and more porous structure was observed.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1547-1549
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery Of Electrodic Powder From Spent Lithium Ion Batteries (LIBs)
    Odzysk proszku elektrodowego z zużytych akumulatorów litowo-jonowych
    Autorzy:
    Shin, S. M.
    Jung, G. J.
    Lee, W-J.
    Kang, C. Y.
    Wang, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/354084.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lithium ion battery
    electrodic powder
    cobalt
    lithium
    thermal treatment
    bateria litowo-jonowa
    proszek elektrodowy
    kobalt
    lit
    obróbka termiczna
    Opis:
    This study was focused on recycling process newly proposed to recover electrodic powder enriched in cobalt (Co) and lithium (Li) from spent lithium ion battery. In addition, this new process was designed to prevent explosion of batteries during thermal treatment under inert atmosphere. Spent lithium ion batteries (LIBs) were heated over the range of 300°C to 600°C for 2 hours and each component was completely separated inside reactor after experiment. Electrodic powder was successfully recovered from bulk components containing several pieces of metals through sieving operation. The electrodic powder obtained was examined by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and atomic absorption spectroscopy (AA) and furthermore image of the powder was taken by scanning electron microscopy (SEM). It was finally found that cobalt and lithium were mainly recovered to about 49 wt.% and 4 wt.% in electrodic powder, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1145-1149
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery Of Electrodic Powder From Spent Nickel-Metal Hydride Batteries (NiMH)
    Odzyskiwanie proszku elektrodowego ze zużytych akumulatorów niklowo-wodorkowych (NiMH)
    Autorzy:
    Shin, S. M.
    Shin, D. J.
    Jung, G. J.
    Kim, Y. H.
    Wang, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/356110.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nickel-metal hybride (NiMH)
    electrodic powder
    nickel
    rare earth elements (REE)
    thermal treatment
    akumulator niklowo-wodorkowy
    proszek elektrodowy
    nikiel
    pierwiastki ziem rzadkich
    obróbka termiczna
    Opis:
    This study was focused on recycling process newly proposed to recover electrodic powder enriched in nickel (Ni) and rare earth elements (La and Ce) from spent nickel-metal hydride batteries (NiMH). In addition, this new process was designed to prevent explosion of batteries during thermal treatment under inert atmosphere. Spent nickel metal hydride batteries were heated over range of 300°C to 600°C for 2 hours and each component was completely separated inside reactor after experiment. Electrodic powder was successfully recovered from bulk components containing several pieces of metals through sieving operation. The electrodic powder obtained was examined by X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) and image of the powder was taken by scanning electron microscopy (SEM). It was finally found that nickel and rare earth elements were mainly recovered to about 45 wt.% and 12 wt.% in electrodic powder, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1139-1143
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Retention, recovery and recycling of metal values from high alloyed Steel slags
    Retencja, odzysk i recycling metalu z żużli wysokostopowych stali
    Autorzy:
    Teng, L. D.
    Seetharaman, S.
    Nzotta, M.
    Dong, P. D.
    Ge, H. L.
    Wang, L. J.
    Wang, H. J.
    Chychko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/353318.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    retencja
    odzysk
    recykling
    żużel
    stal chromowa
    odwęglanie
    retention
    recovery
    recycling
    slag
    chromium steel
    decarburization
    Opis:
    The work was carried out in four parallel directions. The thermodynamic activities of oxides of Cr in steel slags were determined by slag-gas equilibration technique. The ratio of Cr2+/Cr3+ in CaO-MgO(-FeO)-AlO3-SiO2-CrO× system slags was measured by X-ray absorption near edge spectra (XANES). High-temperature mass spectrometry method was also used to obtain the distribution of chromium oxides. A mathematical correlation was established for estimating the ratio of Cr2+/Cr3+ as a function of temperature, partial pressure of oxygen and slag basicity. Laboratory investigations of the decarburization of high alloy steels under controlled oxygen potentials have been carried out to retain Cr in the steel phase. A mathematical model has been developed for the decarburization process with controlled oxygen partial pressure. Experimental and theoretical investigations have been carried out in optimizing the Mo-additions to steel in the EAF practice in Uddeholm Tooling AB. Substantial saving of Mo as well as less emissions of Mo-bearing dust are indicated in the study. A salt extraction process was developed to extract the metal values from steel slags. Successful extractions, followed by electrolysis indicate that this could be a viable route towards recovery of metals from metallurgical slags.
    Praca była realizowana w czterech równoległych kierunkach. Termodynamiczne aktywności tlenków Cr w żużlu zostały określone w stanie równowagi żużel-gaz. Stosunek Cr2+/Cr3+ w żużlach CaO-MgO-(-FeO)-AlO3-SiO2-CrOx mierzono metodą absorpcji promieniowania rentgenowskiego w pobliżu krawędzi widm (XANES). W celu uzyskania rozdziału tlenków chromu wykorzystano wysokotemperaturową spektrometrię masową. Korelację matematyczną ustalono do oceny stosunku Cr2+/Cr3+, jako funkcji temperatury, ciśnienia parcjalnego tlenu i zasadowości żużla. Badania laboratoryjne odwęglania stali wysokostopowych, kontrolowanego przez potencjał tlenowy przeprowadzono, aby pozostawić Cr w stali. Model matematyczny został opracowany dla procesu odwęglania z kontrolą parcjalnego ciśnienia tlenu. Eksperymentalne i teoretyczne badania zostały przeprowadzone przez optymalizację dodatku Mo do stali w procesie EAF w Uddeholm Tooling AB. Znaczne oszczędności Mo, a także mniejsza emisja pyłu zawierającego Mo są wskazane w badaniu. Proces ekstrakcji soli został stworzony, aby wyodrębnić metal z żużli stalowniczych. Udane ekstrakcje, a następnie elektrolizy, wskazują, że mogłaby to być opłacalna droga do odzysku metali z żużli metalurgicznych.
    Źródło:
    Archives of Metallurgy and Materials; 2010, 55, 4; 1097-1104
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Bending, Impact Fracture Behavior and Characteristics of Stainless Steel Clad Plates with Different Rolling Temperature
    Autorzy:
    An, Q.
    Fan, K. Y.
    Ge, Y. F.
    Liu, B. X.
    He, J.
    Wang, S.
    Chen, C. X.
    Ji, P. G.
    Tolochko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049433.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stainless steel clad plate
    interface characteristics
    bending behavior
    impact morphologies
    delamination crack
    Opis:
    The interface characteristics, bending and impact behavior, as well as fracture characteristics of stainless steel clad plates fabricated by vacuum hot rolling at different rolling temperatures of 1100°C, 1200°C and 1300°C are investigated in detail. The interface bonding strength is gradually increased with the increasing rolling temperature due to the sufficient diffusion behavior of alloy element. The bending toughness and impact toughness are gradually decreased, while the bending strength increase with the increase of the rolling temperature, which is attributed to mechanisms of matrix softening and interface strengthening at high rolling temperature. Due to the weak interface at 1100°C, the bending and impact crack propagation path was displaced by delamination cracks, which in turn lead to reduction in stress intensity of the main crack, playing an effective role in toughening the stainless steel clad plates. Moreover, the impact fracture morphologies of clad plates show a typical ductile-brittle transition phenomenon, which is attributed to the matrix softening behavior with the increasing rolling temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 229-239
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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