A sedimentação de lamas vermelhas resultantes da digestão de bauxitas pelo processo Bayer é uma etapa importantíssima para a eficiência da separação sólido/líquido nas plantas industriais de alumina. Nesse trabalho foi feito um estudo comparativo da sedimentação de uma amostra de resíduo Bayer (concentração de sólidos de 43 g/l) proveniente da planta industrial de Poços de Caldas, utilizando floculantes hidroxamatos e poliacrilamida comerciais. Através desses estudos observou-se que a taxa de sedimentação obtida com a poliacrilamida alcançou valores entre 15 e 30 m/h para concentrações bem menores que os hidroxamatos, porém a capacidade de clarificação da mesma foi bem inferior que a dos hidroxamatos. Misturas de poliacrilamida e hidroxamato podem propiciar melhores resultados em termos de taxa de sedimentação e clarificação do "overflow".
The red mud sedimentation from Bayer process of bauxite digestion is a very important step in a solid/liquid separation at industrial alumina plants. In this work a comparative study of red mud sedimentation from Alcoa/Poços de Caldas industrial plant of alumina (43 g/l of solids concentration) using different flocculants (hydroxamates and poliacrylates) was done. The concentration of poliacrylate flocculent to obtain 15 to 30 m/h sedimentation rates was smaller than the concentration of the hydroxamates flocculants, but the clarification overflow obtained with this reagent was worse than the other ones. The mixture of poliacrylamide and hydroxamate in adequate proportions can give better results of sedimentation rates and overflow clarification
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.