Coarse Aggregates Obtained from Red Mud via Pelletizing Process

Luiz Franscisco Isaias; Luana Spricigo Furlan; Fernando Pelisser; Michael Peterson; Oscar Rubem Klegues Montedo; Agenor de Noni

doi:10.4028/www.scientific.net/MSF.798-799.492

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HomeMaterials Science ForumMaterials Science Forum Vols. 798-799Coarse Aggregates Obtained from Red Mud via...

Coarse Aggregates Obtained from Red Mud via Pelletizing Process

Abstract:

The aim of this work was the obtaining coarse aggregate from red mud (RM) focused on the processing properties. RM and two clays (A and B) were selected from Pará state (Brazil) and characterized by XRD, XRF and HSM. Six compositions were planned by mixture design. RM amount varied from 80 to 100wt%. Compositions were pelletized in a pelletizer disc, resulting test pieces of 4 to 19 mm (diameter). Firing temperatures ranged from 1150 to 1190 oC and holding time from 15 to 90 min. Pelletizing humidity, dry friability, water absorption, and apparent density were determined. Clays A and B presented clay mineral content about 67 and 12 wt%, quartz 25 and 82wt%, respectively. The higher clay mineral contents the smaller dry friability and water absorption. Appropriated clay mineral contents and firing parameters is needed in order to satisfy processing and final properties requirements, being possible to obtain aggregates from pelletizing process.

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Periodical:

Materials Science Forum (Volumes 798-799)

Pages:

492-497

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.798-799.492

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Online since:

June 2014

Authors:

Luiz Franscisco Isaias*, Luana Spricigo Furlan, Fernando Pelisser, Michael Peterson, Oscar Rubem Klegues Montedo, Agenor de Noni

Keywords:

Clay Mineral, Pelletization, Red Mud, Residue

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