Reclamation of Mixtures of Spent Sands of Inorganic and Organic Type

Abstract

The results of investigations of the reclamation of spent moulding and core sands, originated from one of the Polish foundry plants, are presented in the paper. Four mixtures consisting of two types of spent sands (spent moulding sand and spent core sand) were subjected to the regeneration process. Each tested mixture consisted of an inorganic type spent moulding sand and of an organic type spent core sand. Proportions of mutual fractions of spent moulding and core sands in mixtures was 70%-30% and was representative for the waste sands from the foundry, from which these sands originated.

Archives of Metallurgy and Materials

“…In the case of self-hardening sands, which include sands with furfuryl resin, reclamation is the basic and effective way of on site waste management in the foundry [8,9].…”

Physical and chemical characteristics of after-reclamation dust from used sand moulds

“…4 kg must be produced. Due to environmental procedure guidelines and to make the process more economically efficient, after the casting is produced, the mould is broken and the silica sand is recovered by means of thermal or mechanical reclamation treatments, and then, it is reused in casting production (Dańko et al 2007;Łucarz et al 2014;Łucarz 2015;Dańko 2010;Skrzyński et al 2013). The process of reclamation of used sand generates large amounts of dusts, which most often contain binding material rubbed from the sand grain surface.…”