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Wyszukujesz frazę "binding sand" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Bench life (work time) of moulding and core sands with chemical binders – a new, ultrasound investigation method
Autorzy:
Zych, J.
Powiązania:
https://bibliotekanauki.pl/articles/381341.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
bench life
ultrasound
binding sand
moulding sand
investigation method
ultradźwięk
materiał wiążący
masa formierska
metoda badawcza
Opis:
The obtained results of the investigations of influences of the selected technological factors on the bench life (work time) of moulding and core sands with chemical binders are presented in the hereby paper. The bench life assessment is performed by the new, author’s method with the application of the ultrasound technique. This method was patented by the author. The influence of such factors as: matrix (surroundings) temperature, matrix water content, ratio of binding components hardener/binder (h/b) and the reclamation – on the bench life of furan moulding sands was determined. The empirical dependencies (regressions) were determined, which allowed forecasting the bench life (BL) of moulding sands as functions: BL = f(W%), BL = f(T) for the fresh and after the reclamation sands, BL = f(h/b). These dependencies should be treated as examples of the new method application for investigating the bench life of moulding sands with chemical binders.
Źródło:
Archives of Foundry Engineering; 2013, 13, 4; 117-122
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the compounds from the BTEX group, emitted during thermal decomposition of alkyd resin
Autorzy:
Kubecki, M.
Holtzer, M.
Bobrowski, A.
Dańko, R.
Grabowska, B.
Żymankowska-Kumon, S.
Powiązania:
https://bibliotekanauki.pl/articles/380216.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
masa formierska
wiązanie
BTEX
analiza termiczna
GC-MS
moulding sand
binding
thermal analysis
Opis:
Suitability of the given binding agent for the moulding sands preparation depends on the one hand on the estimation of technological properties of the sand and the mould made of it and the obtained casting quality and on the other hand on the assessment of this sand influence on the natural and working environment. 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 (phenol-formaldehyde, urea, furfuryl, urea-furfuryl, alkyd) under an influence of a temperature such compounds as: furfuryl alcohol, formaldehyde, phenol, BTEX group (benzene, toluene, ethylbenzene, xylene), and also polycyclic aromatic hydrocarbons (PAH) can be formed and released. The aim of the study was the development of the method, selection of analytical methods and the determination of optimal conditions of formation compounds from the BTEX group. An emission of these components constitutes one of the basic criteria of the harmfulness assessment of binders applied for moulding and core sands. Investigations were carried out in the specially designed set up for the thermal decomposition of organic substances in a temperature range: 5000C - 13000C at the laboratory scale. The object for testing was alkyd resin applied as a binding material for moulding sands. Within investigations the minimal amount of adsorbent necessary for the adsorption of compounds released during the decomposition of the resin sample of a mass app. 15 mg was selected. Also the minimal amount of solvent needed for the desorption of compounds adsorbed in the column with adsorbent was found. The temperature range, in which the maximal amounts of benzene, toluene, ethylobenzene and xylenes are released from the resin, was defined. The qualitative and quantitative analyses of compounds from the BTEX group were performed by means of the gas chromatography combined with the mass spectrometry (GC/MS).
Źródło:
Archives of Foundry Engineering; 2012, 12, 3; 69-74
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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