Processing clinker from wastes: A new raw material source for a global change
authors Buruberri L.H., Seabra M.P., Labrincha J.A.
nationality International
journal Key Engineering Materials
author keywords Biomass fly ash; Portland clinker; Sludge; Wastes valorization
keywords Biological water treatment; Cement industry; Cements; Ceramic materials; Characterization; Fly ash; Secondary recovery; Wastewater treatment; Chemical recovery; European regulation; Firing temperature; Portland clinkers; Production process; Raw material sources; Sludge; Waste characterization; Waste incineration
abstract The final destination of the wastes generated in the manufacture of pulp paper is one of the growing concerns in this sector since the European regulations are becoming stricter in regard to their landfill. So it is urgent to seek ways for their valorization through incorporation in other product as, although not usually dangerous, the quantities generated are substantial. In this work the residues used were: (i) a calcareous sludge generated in the chemical recovery circuit of the production process; (ii) a biological sludge generated in the secondary wastewater treatment step and (iii) a fly ash from the combustion of biomass in the cogeneration operation. The first stage of was the waste characterization and then different blends were prepared and submitted to distinct firing cycles to obtain Portland clinker, the main component of the ordinary cement. Using only wastes in adjusted proportions and a tuned firing cycle, it was possible to obtain ecological Portland clinker. Moreover, it was possible to reduce, by about 50 C, the firing temperature in relation to the value used in cement industry, which results in economical and procedural benefits. © (2016) Trans Tech Publications.
publisher Trans Tech Publications Ltd
year published 2016
volume 663
beginning page 3
ending page 10
digital object identifier (doi) 10.4028/
unique article identifier Scopus: 2-s2.0-84953210996
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