Incorporation of waste from ferromanganese alloy manufacture and soapstone powder in red ceramic production.
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2018
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The production of waste from the mining-metallurgical sector is one of the factors of environmental contamination
and exploring ways to reuse this waste have attracted considerable research attention. This study
proposes the use of residues generated from the manufacturing processes of ferromanganese alloy and soapstone
powder for the production of red ceramic. Ceramic bricks were prepared with clay and sludge to investigate the
effect of a number of variables, including the replacement of clay with sludge (5% and 10%), compaction
pressure (14 and 28 MPa), and firing temperature (850 °C and 1000 °C) on the linear shrinkage, water absorption,
firing specific weight, and compressive strength of the bricks. Also tests were carried out with replacement
of part of the clay mass by sludge and steatite in the same brick. The best condition for ceramic production was
found to be a firing temperature of 1000 °C and compaction pressure of 28 MPa with 5% of clay replaced by
sludge. The best results were obtained for bricks with clay replaced by both sludge and steatite, which prompted
the formation of the new crystalline phases, spinel and enstatite. After analysis, the brick residue was classified
as Non Hazardous and Not Inert. The analyzed parameters were within the established limits for technological
applications.
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Sludge, Reuse
Citação
COTA, T. G. et al. Incorporation of waste from ferromanganese alloy manufacture and soapstone powder in red ceramic production. Applied Clay Science, v. 161, p. 274-281, 2018. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0169131718301947>. Acesso em: 12 fev. 2019.