Otimização estocástica multi-objetivos na produção de Cimento Portland com co-processamento de resíduos e adição de mineralizadores.

Content Provider	Semantic Scholar
Author	Bernardo, A. C.
Copyright Year	2009
Abstract	BERNARDO, A. C. S. M. (2009). Stochastic Multi-Objective Optimization in the Portland Cement Production with Wastes Co-processing and Mineralizers Adition, Itajubá, 205 p. Doctor Thesis Institute of Mechanical Engineering, Federal University of Itajubá. The Portland cement production is a complex process that involves specific raw materials and high consumption of energy, as much thermal as electric, representing high cost production. As alternative fuels for the cement industry industrial wastes have been used. The main advantage of using co-processing techniques is in the possibility to reduce the consumption of traditional fuels and primary raw materials and to promote the reduction of disposition of residues in the environment. Recent studies show that certain residues can contain mineralizers substances. The mineralizers reduce the necessary reaction heat to the formation of the clinker. The reduction in the reaction heat allows a reduction of the consumption of fuel and it promotes the substitution for fuels of smaller calorific power. To obtain an appropriate mixture, considering the variables and the restrictions of operational and environmental order, optimization techniques are necessary. To obtain robust results it was carry out a study of the variability of the variables through Designs of Experiments technique. The data obtained were optimized through the Controlled Random Search Algorithm CRSA. The variables known as stochastic were analyzed by response surface and they were obtained the average and variance functions of the production cost function. Optimization multiobjective was applied to optimize the production cost function together with the average and variance functions. The study shows to be possible to use three types of residues simultaneously, obtaining a robust cost inside of the interval analyzed. The mixture of these residues allows a reduction in the raw materials consumption in 6000 ton a month. The introduction of residues as fuel allows the reduction of traditional fuel. The results show that it is possible to obtain quality cement through the mixture that was obtained from the optimization. The introduction of industrial wastes as partial substitutes of raw materials represent an economy of approximately 5% in the introduction of raw materials traditional. The residue phosphogypsium can be added to the process maintaining the quality of the final product. The introduction of industrial waste as secondary fuel allows the reduction in the consumption of mineral coal.
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Alternate Webpage(s)	https://repositorio.unifei.edu.br/xmlui/bitstream/handle/123456789/1526/tese_0035942.pdf?isAllowed=y&sequence=1
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article