Experimental and Numerical Investigations on Conductive Drying of Phosphate Washing Waste Clay


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Output type: Journal article

UM6P affiliated Publication?: Yes

Author list: Berroug, Fatiha; Bellaziz, Yassir; Ouazzani, Naaila; Nouh, Fatima Ait; Hejjaj, Abdessamad; Boukhattem, Lahcen; Idlimam, Ali; El Mahmoudi, Hamid; Mandi, Laila

Publisher: MDPI

Publication year: 2021

Journal: Minerals (2075-163X)

Volume number: 11

Issue number: 5

ISSN: 2075-163X

eISSN: 2075-163X

Languages: English (EN-GB)


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Abstract

Morocco is the leading producer of phosphate and its derivatives in the world with a total production of 35 Mt. However, the extraction and the valorization of this mine generate huge quantities of phosphate washing waste clay (PHWWC) that constitute a main environmental and economic concern. To facilitate this waste clay storage and handling, it is necessary to decrease its moisture content that represents 80% of PHWWC. The present paper is devoted to studying the conductive drying of PHWWC. Drying experiments were conducted in a laboratory pilot. Afterwards, the experiment results were implemented in a one-dimensional numerical model of heat and mass transfer in a porous media to identify the drying parameters and performances. It was found that most of the water contained in PHWWC is free water that is removed with a constant drying rate. The volume reduction with a marked cracks phenomenon attained 65% without any significant effect of drying temperature and sample thickness. The effective moisture diffusivity of the PHWWC for a conductive drying process is ranged between 10(-9) and 1.1 x 10(-8) m(2)center dot s(-1). The thermal efficiency of the drying system is up to 86%. The results could be used for the purpose of design and scale-up of the industrial dryer based on laboratory-scale experiments.


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Last updated on 2021-22-09 at 23:22