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    Wyświetlanie 1-4 z 4
    Tytuł:
    New method of electrostatic separation of the oxidized iron ore
    Autorzy:
    Idres, A.
    Bouhedja, A.
    Bounouala, M.
    Benselhoub, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/89112.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    iron ore
    electrostatic separation
    reagent-collector
    reagent–depressant
    efficiency
    Opis:
    The complexity of the mineralogical, chemical and exogenous parameters generates a low efficiency of electrical separation of oxidized iron ore. For this purpose, a study was conducted to provide a method for electrostatic separation and to select the chemical reagents. And this, for increasing the contrast of the dielectric separating minerals in the corona discharge field. The reagent-collector used is the auramine with a specific consumption of 0.3 kg/t. Whereas, the reagent depressants is carboxymethyl cellulose mixture with a specific consumption of 0.25 kg/t. From the obtained test results electrical treatment of oxidized iron ore are satisfied for proposed process.
    Źródło:
    Mining Science; 2016, 23; 33-41
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Air pollution mapping in the Wilaya of Annaba (NE of Algeria)
    Autorzy:
    Kharytonov, M.
    Benselhoub, A.
    Klimkina, I.
    Bouhedja, A.
    Idres, A.
    Aissi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/89046.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    geographical information system
    atmospheric pollution
    industrial activities
    risk assessment
    Annaba
    Opis:
    Poor air quality can pose severe risks to human health and can also influence negatively on the natural environment. Annaba suffers from air pollution due to the industrial activities occurring in the province including, electricity generation, waste incineration, chemistry and other small additional industrial operations. However, mining, steel industry and metallurgy are considered among the most polluting activities. The aim of our research is to assess the risks of air pollution emissions with NO2, SO2, Toluene and Benzene as a result of industrial enterprises activities in Annaba province. The application of geo-graphical information system (GIS) mapping based on automatic monitoring networks of air quality, allows us the assessment of air pollution risks in the studied area. Two zones of air pollution with N02 in the level of 1 MPC has been recorded near the blast furnaces and the steel shop, the second halo of NO2 pollution was fixed over residential infrastructures. Moreover, revealed a tendency to higher content of nitrogen dioxide in the atmosphere of the bigger part of Annaba region. Corresponding to the data obtained from stationary monitoring networks, the annual average concentration of SO2 was significantly lower than the MPC. Based on GIS maps there are two areas with SO2 pollution inside the territory of El Hadjar metallurgical plant. A significant increase in concentrations of NO2 in the atmosphere of the industrial areas was recorded in the first decade. On average during three years the highest content of technogenic dust was detected in El Bouni.
    Źródło:
    Mining Science; 2016, 23; 183-189
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of PROMETHEE mathematical model for choosing a secondary breakage process of the oversized blocks in limestone quarries
    Autorzy:
    Bouhedja, A.
    Idres, A.
    Boutrid, A.
    Bounouala, M.
    Benselhoub, A.
    Talhi, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/972324.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    centroid weight method
    Hadjar-Soud quarry
    multicriteria analysis
    fragmentation
    Opis:
    In this paper, the approach consists in selecting the best secondary breakage process of oversize blocks with explosives for the limestone quarries. To solve this problem, we propose the centroid weight method for weighting the selection criteria, and the PROMETHEE model as a multicriteria decision making method. A case study is carried out in the limestone quarry of the cement factory of Hadjar-Soud, Algeria.
    Źródło:
    Mining Science; 2016, 23; 121-135
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Air pollution mapping with nitrogen and sulfur dioxides in the south-eastern part of Ukraine using satellite data
    Autorzy:
    Stankevich, S.
    Titarenko, O.
    Svideniuk, M.
    Kharytonov, M.
    Benselhoub, A.
    Khlopova, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/89189.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    air pollution
    industry
    acid rains
    spatial distribution
    remote sensing
    Opis:
    Atmospheric pollution in Ukraine has become a significant environmental problem, especially in the eastern part where heavy industries are located, and it is particularly severe in industrial centers such as; Zaporizhia, Kryvyi Rih, Dnipropetrovs’k and Dniprodzerzhyns’k. The main emission sources are ferrous metallurgical plants and the coal industry. The purpose of this project is to estimate the degree of pollution from dioxides of nitrogen and sulfur in the south-eastern part of Ukraine using satellite data. An assessment of atmospheric pollution by NO2 is carried out using the data from satellite spectrometer EOS/OMI, and information products Level 3 from Goddard Earth Sciences Data, (GES DISC) NASA for 2009-2014. According to the results study, the largest area of propagation of SO2 aerosol was observed in the industrial agglomerations of Kryvyi Rih, Dnipropetrovs’k and Vilnohirs’k.However, a somewhat smaller content of NO2 in the air recorded near the town of Kryvyi Rih and the cities of Vilnohirs’k and Zaporizhia.The results obtained from this research will aid the creation of awareness among Ukraine’s policy makers about the need for air pollution abatement, and also serve as a stepping stone towards addressing the negative impacts of acid rains.
    Źródło:
    Mining Science; 2016, 23; 21-31
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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