Addition of mininig residues in the formulation of ceramic masses of use in tile

Reference	Presenter	Authors (Institution)	Abstract
06-006	Ivna Daniele Souza Pereira	Almeida, E.P.(Universidade Federal de Campina Grande); Apolônio, T.G.(Universidade Federal de Campina Grande); Carreiro, M.E.(Universidade Federal de Campina Grande); Santana, L.N.(Federal University of Campina Grande); Ferreira, H.C.(Universidade Federal de Campina Grande); Neves, G.A.(Universidade Federal de Campina Grande); Pereira, I.D.(Universidade Federal de Campina Grande);	The residue generated by mining industry, like schellite and kaolin, have high quantity of sílica and alumina, and are general discarded in inadequate places, causing greating impact n the environment. These residues present adequate chemical composition for ceramics masses. Their addition to the formulations may reduce the consumption of traditional raw materials, as well as, the environmental impact. The aim of this work is to evaluate the influence of scheelite and kaolin residues in the compositions of ceramics masses to be used in tile. The residues and the ceramics raw materials (ball clay and feldspar) were initially submitted to the following characterizations: physical, chemical, mineralogical and termal. Later, ceramic masses were formulated with 10%, 13% and 18% of schellite residue and steady amount (25%) of kaolin residue. The masses were moistened with 8% humidity. The proff bodies with dimension 55mm x 40mm x 5mm were confirmed by uniaxial pressing, at 13MPa, 20MPa e 22 MPa. After conformation, the proof bodies were dried at 110ºC and submitted to thermal treatment at 1000°C, 1150°C and 1200°C with heating rate of 5°C/min and maximum holding time of 2 hours. The physical- mechanical properties evaluated were: water absorption, density, apparent porosity and flexural strength. The results evidenced that the proff bodies incorporated with residues presented adequate properties to be used in ceramic tile.
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