Characterizations of the cellulose residues and waste foundry sand and use dropped development of glass-ceramic material

Reference	Presenter	Authors (Institution)	Abstract
06-124	Leila Maria Sotocorno e Silva	Silva, L.M.(Universidade Estadual Paulista); Santos, L.F.(Universidade Estadual Paulista); Magalhães, R.d.(Universidade Estadual Paulista); Santos, G.T.(Universidade Estadual Paulista); Souza, A.E.(Universidade Estadual Paulista); Teixeira, S.R.(Universidade Estadual Paulista);	Characterizations of the cellulose residues and waste foundry sand and use dropped development of glass-ceramic material The waste foundry sand (WFS) is one of the largest industrial solid waste volume generated by the foundries in the production of cast iron and steel parts. It has a high concentration of silicon oxide and other elements important minority, who favor the use of waste for the production of glass-ceramic materials. Waste from cellulose industry have in your chemical composition, mainly calcium and magnesium oxides, important for the production of glass-ceramics. In this paper a new composition of these two residues, are evaluated for glass-ceramics production, the base of calcium silicates. Sands were analyzed from different foundries companies dropped, with varied concentrations of SiO2, and waste from a cellulose industry. To determine the composition of the glass-ceramic material used the ternary phase diagram of the system SiO2-CaO-Al2O3. The WFS and cellulose residues were mixed with fondant, in different combinations, were merged and cooled in water, to obtain the glass (melting and cooling method). The glasses were milled and submitted to differential thermal analysis (DTA), for the determination of the glass transition temperature and crystallization. Powdered glass samples were crystallized, for formation of the glass-ceramic material, in temperatures determined by DTA. The waste, glass and glass-ceramics were characterized using x-ray diffractometry (XRD). Were determined water absorption, porosity, and apparent density of glass-ceramic.
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