Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "lead concentrate" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-5 z 5
    Tytuł:
    Optimization and kinetics studies of lead concentrate leaching using fluoroboric acid
    Autorzy:
    Sabouti, Arash
    Rezai, Bahram
    Hoseinian, Fatemeh Sadat
    Moradkhani, Davood
    Powiązania:
    https://bibliotekanauki.pl/articles/109695.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    lead concentrate
    fluoroboric acid
    hydrometallurgy
    optimization
    kinetics
    Opis:
    In this study, the feasibility of lead dissolution from lead concentrate using fluoroboric acid by hydrometallurgical method was investigated in order to aviod the disadvantages of the pyrometallurgical processes. The effects of important operating parameters such as leaching time, liquid/solid ratio, stirring speed, temperature and fluoroboric acid concentration on the lead recovery were investigated using response surface methodology (RSM) based on the central composite design (CCD) model. The results show that the optimum conditions for the high lead recovery were: leaching time= 30 min, liquid/solid ratio= 10, stirring rate= 500 rpm, temperature= 80oC and fluoroboric acid concentration= 3.35 mol/L. More than 94% of lead was recovered in the optimum conditions. The results indicated that the liquid/solid ratio, fluoroboric acid concentration, temperature and leaching time were the most effective parameters on the process efficiency, respectively. Dissolution kinetics studies of lead in the fluoroboric acid were also evaluated. The chemical reaction was determined as the controlling mechanism of reaction at the shrinking core model. The activation energy was determined using Arrhenius model as 5.99 kJ/mol.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 4; 1014-1027
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of preoxidation on copper flotation from copper-lead mixed concentrate
    Autorzy:
    Peng, Zeng
    Haiyun, Xie
    Yanling, Jin
    Pei, Zhang
    Jialing, Chen
    Liu, Dianwen
    Powiązania:
    https://bibliotekanauki.pl/articles/24085956.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    copper-lead mixed concentrate
    peroxidation
    separation of copper and lead
    response surface methodology
    Opis:
    Flotation separation of galena and chalcopyrite is always a difficult problem in mineral processing. In this paper, the selective preoxidation of galena and chalcopyrite with sulfuric acid was developed, and then the two minerals were completely separated by flotation. The surface oxidation mechanism of galena and chalcopyrite with sulfuric acid was analyzed by Fourier transform infrared spectroscopy (FT-IR) and Atomic Force Microscopy (AFM), and the results showed that hydrophilic oxide film was formed on the galena surface, while the surface of chalcopyrite is still hydrophobic sulfide film, which led to the separation of the two minerals by flotation. In addition, the Response Surface Methodology (RSM) was used to analyze the influence of main preoxidation parameters on the flotation separation of copper-lead concentrate, and the parameters were further optimized, as follows: sulfuric acid concentration of 5.3 mol/L, oxidation temperature of 101.8 °C and time of 48.3 min. The mixed concentrate containing Cu 11.57% and Pb 16.75% was preoxidized under the above conditions, and the flotation separation verification results showed that Cu concentrate with Cu grade of 18.09% and recovery of 95.41%, and Pb concentrate with Pb grade of 44.96% and recovery of 95.94% was obtained respectively. This paper provides a new method of preoxidation combined flotation to achieve high-efficiency separation of copper-lead mixed concentrate.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 2; art. no. 163253
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chloride leaching of silver and lead from a solid residue after atmospheric leaching of flotation copper concentrates
    Autorzy:
    Chmielewski, T.
    Gibas, K.
    Borowski, K.
    Adamski, Z.
    Wozniak, B.
    Muszer, A,
    Powiązania:
    https://bibliotekanauki.pl/articles/109629.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    copper concentrate
    atmospheric leaching
    chloride leaching
    silver
    lead
    Opis:
    Recovery of silver and lead by means of chloride leaching of solid residue after atmospheric leaching of the copper concentrate from Lubin Concentrator (KGHM) was investigated. The effect of leaching temperature, chloride concentration, Fe(III) and oxygen presence, solid-to-liquid ratio and feed preleaching with NaOH on the silver and lead recovery was analyzed. Chloride leaching appeared to be very effective for recovery of lead, whereas satisfactory recovery of silver was observed after chemical pretreatment of the leaching feed with alkali solution of NaOH in order to liberate Ag entrapped in the jarosite structure. It was found that to achieve the satisfactory recovery of Ag and Pb leaching had to be performed in acidified 4 M chloride concentration at temperature of 90 oC. The presence of oxidants, that is O2 and iron(III) ions, was beneficial in the initial stage of the process. The maximum recovery of Ag and Pb was found for the solid-to-liquid ratio of 1:10 after 10 hours leaching.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 2; 893-907
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduction of Lead Oxide by Fine-Grained Carbonaceous Materials
    Autorzy:
    Matuła, T.
    Siwiec, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/356221.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lead oxide
    lead
    fine-grained carbonaceous materials
    anthracite dust
    coal flotation-concentrate
    reduction
    thermogravimetry
    Opis:
    As part of the presented work, tests were carried out to check the possibility of replacing of conventional reducers used in the lead pyrometallurgical processes by cheaper, but equally effective substitutes. For research of lead oxide reduction, the following fine-grained carbonaceous materials were used, ie anthracite dust and coal flotation concentrate, as well as traditional used coke breeze for comparison. The obtained test results indicate a similar ability to reduce the lead oxide of all studied carbonaceous materials.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 2; 647-652
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ utleniacza na ługowanie ołowiu z koncentratu miedziowego
    The effect of oxidant on leaching lead from copper concentrate
    Autorzy:
    Sanak-Rydlewska, S.
    Bieszczad, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/318797.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    koncentrat miedziowy
    obróbka chemiczna
    zawartość ołowiu
    ługowanie
    copper concentrate
    chemical treatment
    lead content
    leaching
    Opis:
    W artykule podano wyniki doświadczeń laboratoryjnych ługowania ołowiu z koncentratu miedziowego za pomocą octanu amonu. Przebadano wpływ dodatku nadtlenku wodoru do roztworu ługującego na stopień ługowania ołowiu z koncentratu. Proces prowadzono przez 60 minut w temperaturze 293 K, stosując roztwory octanu amonowego o stężeniu 10% i 40% wagowych.
    This article presents results of laboratory experiments of leaching lead from copper concentrate with ammonium acetate. The effect of addition of hydrogen peroxide to the leaching solution on the rate of lead leaching from copper concentrate was studied. The process was carried out for 60 minutes at 293 K, in 10 and 40 percent (by weight) ammonium acetate solutions.
    Źródło:
    Inżynieria Mineralna; 2001, R. 2, nr 1, 1; 35-39
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies