Search the store:   Advanced Search
Back to Rare earths recovery and gypsum upgrade from Florida phosphogypsum

Rare earths recovery and gypsum upgrade from Florida phosphogypsum

  • Max downloads: 10
    Downloads allowed for: 12 month
Description: Phosphogypsum is a byproduct created during the production of industrial wet-process phosphoric acid. This study focused on recovering rare earth elements (REEs) from a Florida phosphogypsum sample and investigated the effects of removing detrimental impurities such as phosphorus pentoxide (P2O5 ), uranium (U) and fluorine (F) during the leaching process. Experimental results indicated that REE leaching efficiency increased rapidly, reached a maximum and then began to decrease with sulfuric acid concentrations ranging from 0 to 10 percent and temperatures ranging from 20 to 70 °C. At a sulfuric acid concentration of 5 percent and leaching temperature of 50 °C, REE leaching efficiency obtained a maximum value of approximately 43 percent. Increasing the leaching time or liquid/solid ratio increased the leaching efficiency. The leaching efficiencies of P2O5, U and F consistently increased with sulfuric acid concentration, temperature, leaching time and liquid/solid ratio within the testing ranges. A fine-grain gypsum concentrate, sized smaller than 40 μm, was separated from leached phosphogypsum through elutriation, in which the P2O5, U and F content levels were reduced by 99, 70 and 83 percent, respectively, from their content levels in fresh phosphogypsum.
Published Date: November 17, 2017
Author(s)s: Liang, H. Zhang, P. Jin, Z. DePaoli, D.
Format: PDF
Download Size: 773 KB
# Pages: 6

  • List Price: $50.00 USD

Item Details:
Rare earths recovery and gypsum upgrade from Florida phosphogypsum
Back to Rare earths recovery and gypsum upgrade from Florida phosphogypsum

Related products that might be of interest…

Back to Product Detail
There are not any reviews for this product.
1 - 0 of 0
select
1
1 - 0 of 0
select
1

0