Preparation of clinker from paper pulp industry wastes
authors Buruberri, LH; Seabra, MP; Labrincha, JA
nationality International
journal JOURNAL OF HAZARDOUS MATERIALS
author keywords Paper pulp wastes; Sludge; Biomass fly ash; Clinker; Mortars
keywords FLY-ASH; SEWAGE-SLUDGE; PHASE-TRANSFORMATIONS; BRICK PRODUCTION; MILL WASTE; ECO-CEMENT; RESIDUES; SOIL; MANAGEMENT; PYROLYSIS
abstract The production of paper pulp by the Kraft method generates considerable amounts of wastes. Namely, lime mud generated in the recovery circuit of chemical reagents, biological sludge from the wastewater treatment of wood digestion process and fly ash collected in the fluidized bed combustor used to generate electricity from biomass burning. The final destination of such wastes is an important concern, since environmental regulations are becoming stricter regarding their landfill. Driven by this fact, industries are looking for more sustainable solutions, such as the recycling in distinct products. This work tested these wastes as secondary raw materials to produce clinker/cement that was then experienced in mortar formulations. The first step involved the residues detailed characterization and a generated amounts survey. Then, specific but simple steps were suggested, aiming to facilitate transport and manipulation. Distinct blends were prepared and fired in order to get belitic and Portland clinkers. The Portland clinkers were processed at lower temperatures than the normally used in the industry due to the presence of mineralizing impurities in some wastes. Belite-based cements were used to produce mortars that developed satisfactory mechanical strength and did not reveal signs of deterioration or durability weaknesses. (C) 2014 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE BV
issn 0304-3894
year published 2015
volume 286
beginning page 252
ending page 260
digital object identifier (doi) 10.1016/j.jhazmat.2014.12.053
web of science category Engineering, Environmental; Engineering, Civil; Environmental Sciences
subject category Engineering; Environmental Sciences & Ecology
unique article identifier WOS:000351963100030
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journal impact factor 6.434
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