TY - JOUR N2 - 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. L1 - http://journals.pan.pl/Content/89147/PDF/afe-2016-0020.pdf L2 - http://journals.pan.pl/Content/89147 PY - 2016 IS - No 2 DO - 10.1515/afe-2016-0020 KW - Spent moulding sands KW - Thermal analysis KW - Organic binders KW - Ignition loss A1 - Łucarz, M. PB - The Katowice Branch of the Polish Academy of Sciences DA - 2016 T1 - Analysis of Spent Moulding Sands with Binders of Various Thermal Degradations, in an Aspect of a Possibility of a Directional Mould Degassing UR - http://journals.pan.pl/dlibra/publication/edition/89147 T2 - Archives of Foundry Engineering ER -