Title: Utilisation of pulp and paper industry wastes as raw materials in cement clinker production

Authors: Fernando Castro, Candida Vilarinho, Delfim Trancoso, Paula Ferreira, Fernando Nunes, Augusto Miragaia

Addresses: Department of Mechanical Engineering, University of Minho, 4800-058 Guimaraes, Portugal. ' Department of Mechanical Engineering, University of Minho, 4800-058 Guimaraes, Portugal. ' Portucel Viana SA, Apartado 550, 4901-852 Viana do Castelo, Portugal. ' Portucel Viana SA, Apartado 550, 4901-852 Viana do Castelo, Portugal. ' CMP SA, Fabrica Maceira Liz, 2405-019 Maceira – Leiria, Portugal. ' CMP SA, Fabrica Maceira Liz, 2405-019 Maceira – Leiria, Portugal

Abstract: The present work assesses the incorporation of grits and dregs, both wastes from cellulose and paper making industry, in cement clinker production. Industrial trials were developed with conventional raw clinker, used as a reference material and with the addition of grits and dregs, 0.25% and 0.13%, respectively. All raw meals were fired at 1400–1500°C. Chemical composition of the final mixtures, gaseous emissions quality during clinker production and leaching behaviour of the final products were evaluated. The results show that such incorporation could be an effective process for waste management from both the environmental and economic points of view.

Keywords: dregs; grits; incorporation; waste management; raw materials; pulp and paper industry; cement clinker production; chemical composition; gaseous emissions; leaching behaviour.

DOI: 10.1504/IJMATEI.2009.024028

International Journal of Materials Engineering Innovation, 2009 Vol.1 No.1, pp.74 - 90

Published online: 24 Mar 2009 *

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