Analysis of Spent Moulding Sands with Binders of Various Thermal Degradations, in an Aspect of a Possibility of a Directional Mould Degassing

• Autorzy: Łucarz M.

Identyfikatory

DOI

10.1515/afe-2016-0020

• Języki publikacji: EN

Abstrakty

EN

The results of investigations of spent moulding sands taken from the mould in which the metal core cooling system - to increase the cooling rate of the ladle casting - was applied, are presented in the hereby paper. The changes of the spent moulding sand at the casting external side being the result of degradation and destruction processes of organic binder, were analysed in this publication. Since the reclaimed material, obtained as a result of the mechanical reclamation of spent sands of the same type, is used as a grain matrix of the moulding sand, the amount of a binder left from the previous technological cycle is essential for the sound castings production. On the bases of investigations of the thermal analysis, ignition losses, dusts contents and pH values of the samples taken from the spent sand the conditions under which the process of gases displacing in the casting mould was realised as well as factors limiting the efficient mould degassing - were considered in this study. The possible reason of a periodical occurrence of an increased number of casting defects due to changing gas volume emission, being the reason of the realised technological process, was indicated.

Słowa kluczowe

EN

moulding sand; thermal analysis; organic binder; degassing; ignition loss

PL

masa formierska; analiza termiczna; spoiwo organiczne; odgazowanie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 2
• Strony: 21--26
• Opis fizyczny: Bibliogr. 6 poz., il., rys., tab., wykr.

Twórcy

autor

Łucarz M.

• AGH - University of Science and Technology Faculty of Foundry Engineering, Department of Foundry Processes Engineering, Reymonta 23, 30-059 Cracow, Poland

Bibliografia

• [1] Łucarz, M. (2014). The effect of mechanical and thermal reclamation on the matrix of quartz grain state. Polska metalurgia w latach 2011–2014: monografia Komitet Metalurgii Polskiej Akademii Nauk, Kraków, Wydawnictwo Naukowe AKAPIT, 497–510 (in Polish).
• [2] Łucarz, M., Grabowska, B. & Grabowski, G. (2014). Determination of parameters of the moulding sand reclamation process, on the thermal analysis bases. Archives of Metallurgy and Materials. 59 (3), 1023-1027.
• [3] Łucarz, M. (2015). Setting temperature for thermal reclamation of used moulding sands on the basis of thermal analysis. Metalurgija. 54 (2), 319 – 322.
• [4] Janowska, G., Przygocki, W., Włochowicz, A. (2007). Flammability of plastics, WNT, Warszawa (in Polish).
• [5] Dańko, J., Dańko, R., Łucarz, M. (2007) Processes and devices for the reclamation of spent moulding sands. Kraków, Wydawnictwo Naukowe AKAPIT (in Polish).
• [6] Dańko R. (2012). Strength model of self-setting moulding sands with synthetic resins in an aspect of the integrated matrix recycling process. Katowice-Gliwice, Archives of Foundry Engineering. (in Polish).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.