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    Wyświetlanie 1-5 z 5
    Tytuł:
    Influence of the Hardener on the Emission of Harmful Substances from Moulding Sands with Furan Resin in the Pyrolysis Process
    Autorzy:
    Holtzer, M.
    Kmita, A.
    Żymankowska-Kumon, S.
    Bobrowski, A.
    Dańko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/380824.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    furan resin
    mould sand
    emission of gases
    pyrolisis
    BTEX
    PAH
    żywica furanowa
    masa formierska
    emisja gazów
    piroliza
    Opis:
    The furan resin offers advantages such as high intensity, low viscosity, good humidity resistance and is suitable for cast different casting alloys: steel, cast iron and non-ferrous metal casting. For hardening furan resins are used different hardeners (acid catalysts). The acid catalysts have significant effects on the properties of the cured binder (e,g. binding strength and thermal stability) [1 - 3]. Investigations of the gases emission in the test foundry plant were performed according to the original method developed in the Faculty of Foundry Engineering, AGH UST. The analysis is carried out by the gas chromatography method with the application of the flame-ionising detector (FID) (TRACE GC Ultra THERMO SCIENTIFIC).
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 1; 107-111
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Reclaim Addition on the Emission of PAHs and BTEX from Moulding Sands with Furfuryl Resin with the Average Amount of Furfuryl Alcohol
    Autorzy:
    Holtzer, M.
    Żymankowska-Kumon, S.
    Bobrowski, A.
    Dańko, R.
    Kmita, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/383161.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    foundry
    moulding sands
    BTEX
    PAHs
    reclaim
    ochrona środowiska
    odlewnia
    masa formierska
    odzysk
    Opis:
    In this paper, the results of decomposition of the moulding sand with furan-formaldehyde resin (with middle content of furfuryl alcohol about 50 %) also on a quartz matrix and with additions of a reclaimed material, under industrial conditions, are presented. Investigations of the gases emission in the test foundry plant were performed according to the original method developed in the Faculty of Foundry Engineering, AGH UST. The dependence of the emitted PAHs and BTEX group substances and ignition losses on the reclaim fraction in a moulding sand are of a linear character of a very high correlation coefficient R2. On the bases of the derived equations, it is possible to determine the amount of the emitted hazardous substances from the moulding sand containing the known fraction of the reclaim.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1 spec.; 37-42
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Reclaim Addition to the Moulding Sand Matrix Obtained in the ALPHASET Technology on the Emission of Gases - Comparison with Moulding Sand with Furfuryl Resin
    Autorzy:
    Holtzer, M.
    Żymankowska-Kumon, S.
    Bobrowski, A.
    Kmita, A.
    Dańko, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/379528.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovatory materials
    ecology
    modern technologies
    innowacyjne materiały
    nowoczesne technologie
    ekologia
    Opis:
    This study focuses on the ALPHASET process of mould making (Ester-Cured Alkaline Phenolic No-Bake). The cross – linking of alkaline phenolic resole resin by adding at least one kind of organic esters is the secondary popular system (after the technology of molding sands with furfuryl resins) with the advantages including low odour, virtually no smoke, easy to stripping, good finishing, low veining, minimal erosion, and very good hot strength. The phenolic resoles used in the system are prepared typically by reacting 30-55% formaldehyde solution with less phenol using a strong alkali catalyst, such as sodium hydroxide or potassium hydroxide at the temperatures of below 110oC (pH > 7). After removing parts of water this yields a thermal set phenolic resin solution with solid content 50-70%. In order to significantly increase strength and to improve the moisture and humidity resistance of sand mould, it is necessary to mix a little silence solution addition with resin binder (about 0.1 – 0.3% based on the amount of resin binder).
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1 spec.; 121-125
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of Harmfulness of Phenolic Resins Hardened by CO2 in an Aspect of Emission of Substances from BTEX and PAH Groups
    Autorzy:
    Holtzer, M.
    Żymankowska-Kumon, S.
    Bobrowski, A.
    Dańko, R.
    Kmita, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380226.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    phenolic resin
    BTEX
    PAH
    foundry
    ochrona środowiska
    żywica fenolowa
    odlewnia
    Opis:
    Out of moulding sands used in the foundry industry, sands with organic binders deserve a special attention. These binders are based on synthetic resins, which ensure obtaining the proper technological properties and sound castings, however, they negatively influence the environment. If in the initial state these resins are not very dangerous for people and for the environment, thus under an influence of high temperatures they generate very harmful products, being the result of their thermal decomposition. Depending on the kind of the applied resin under an influence of a temperature such compounds as: furfuryl alcohol, formaldehyde, phenol, BTEX group (benzene, toluene, ethylobenzene, xylenes), and also polycyclic aromatic hydrocarbons (PAHs) can be formed and released.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 39-43
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elution of mixed moulding sands with the GEOPOL binder and core sands with the phenolic resin
    Autorzy:
    Holtzer, M.
    Żymankowska-Kumon, S.
    Dańko, R.
    Kmita, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/380919.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    phenolic resin
    moulding sand
    core sand
    BTEX
    PAHs
    ochrona środowiska
    żywica fenolowa
    masa formierska
    masa rdzeniowa
    Opis:
    Out of moulding and core sands used in the foundry industry, sands with organic binders deserve a special attention. These binders are based on synthetic resins, which ensure obtaining the proper technological properties and sound castings, however, they negatively influence the environment. Depending on the kind of the applied resin under an influence of a temperature such compounds as for example BTEX group and polycyclic aromatic hydrocarbons (PAHs) can be formed and released. During storing or economic utilization of used sand is possibility of eluting harmful substances into the environment. Therefore at assessing an influence of the used sand on the environment two above elements should be taken into consideration. Only such investigations provide the complete assessment of the given sand harmfulness.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 4; 53-56
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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