Naslov
Characterization of bentonites for green sand mixtures

Autori
Holjevac-Grgurić, Tamara ; Radoš, Martina ; Brnardić, Ivan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings book of 12th International Foundrymen Conference / Dolić, Natalija ; Glavaš, Zoran ; Zovko Brodarac, Zdenka - Sisak : Metalurški fakultet Sveučilišta u Zagrebu, 2012, 135-135

ISBN
978-9537082-14-7

Skup
12th International Foundrymen Conference

Mjesto i datum
Opatija, Hrvatska, 24.05.2012. - 25.05.2012

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Molding compound ; bentonite ; montmorillonite ; thermal stability ; microstructure

Sažetak
In this work, the effect of bentonite quality on mold mixture properties was investigated. Investigations were done with commercial type of bentonite. Testing mixtures were prepared with bentonite, water and sand. Investigations of technological properties were done in foundry „Plamen d.o.o.“, Požega. Compressive strength and wet tensile strength were determined before and after calcination at 550 °C, during 2 hours. Chemical analysis was performed by X-ray Fluorescence (XRF). Fourier Infrared Spectroscopy (FTIR) was used to get insight in bentonite structure. Particle size of investigated samples was determined by Laser Diffraction. Gas adsorption-desorption analysis was performed to determine specific area, pore volume and distribution of pore volume. Thermal stability of bentonites was studied by simultaneous thermal analysis Differential Thermal Analysis/Thermogravimetry (DTA/TG). Simulation of mold mixture temperatures during casting was obtained by software MAGMA SOFT®. Temperature of dehidroxylation process proved to be the key factor for bentonite quality as a material for application in foundry industry.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Metalurgija

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