Containing Rare Earth Phosphate Rock Processing and Rare Earth Enrichment in those Processes

Abstract:

The reserve of sedimentary phosphate deposits in Guizhou province in western China is huge, but has been no development because of its difficulties of comprehensive utilization. Using mineral processing techniques, Rare earth containing phosphate rock flotation and flotation concentrate leaching test study were done. Rare earth enrichment in those processes was studied too. Through rougher flotation conditions test, it was determined that the optimal rougher flotation conditions were grinding fineness 75% -0.074mm, H₂SO₄, H₃PO₄ and SOP dosage of 10kg/t, 0.15kg/t and 0.8 kg/t. A reverse flotation flowsheet consisted of one roughing, one cleaning and one scavenging stage was used for the closed-circuit flotation tests. Phosphate concentrate could be got with P₂O₅, MgO, REE grade of 31.87%, 0.98%, 0.15% and recovery of 85.83%, 8.84%, 86.81% respectively. P₂O₅ recoveries and REE recoveries of phosphate concentrate was a positive linear relationship. Under the condition of liquid/solid3:1, acid/ore ratio 1.2, leaching time 3.5 hours and temperature 75°C, the phosphate concentrate was leached by sulfuric acid. The better indicators that P₂O₅ leaching rate of 95.92% and REE leaching rate of 52.11% could got.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 1022-1028
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.1022
• Online since: August 2013
• Authors: Guanghua Nie, Ti Chang Sun, Shuai Li, Hai Lan Li
• Keywords: Flotation, Leaching, Mineral Processing, Phosphate Rock, Rare Earth

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