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PROCESSING AND COMPLEX USAGE OF MINERAL RAW MATERIALS
Название Treatment of phosphoric acid sludge for rare earths recovery III: comparison of sawdust filter aid as body feed with pre-coating
DOI 10.17580/em.2019.02.11
Автор Allaedini G., Zhang P.
Информация об авторе

 Florida Industrial and Phosphate Research Institute, Florida Polytechnic University, Lakeland, United States:

Allaedini G., PhD Chemical Engineering, jiny_ghazaleh@yahoo.com
Zhang P., Director of Beneficiation and Mining

Реферат

Extra fine sawdust has been utilized as a filter aid for the filtration of the phosphoric acid sludge and recovery of Rare Earth Elements (REE). Results show that the addition of sawdust as a filter aid enhances the filtration in terms of solid residue retained and the quality of either the recovered acid when applied as a precoat or a body feed. It was found that an increase of sawdust dosage above 0.5% reduced REE distribution in the final solid residue with a slight increase in the rate of filtration up to 1%. Application of sawdust as a pre-coat resulted in a final dried solid product containing less phosphorus. This study showed that sawdust could be employed as a low-cost commercial filter aid for treatment of the phosphoric acid sludge for recovery of REE, as well as the phosphoric acid value.

Ключевые слова Phosphoric acid sludge, sawdust, filter aids, rare earths elements
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Полный текст статьи Treatment of phosphoric acid sludge for rare earths recovery III: comparison of sawdust filter aid as body feed with pre-coating
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