FIELD: metallurgy.
SUBSTANCE: method involves leaching rare-earth elements and phosphorus from phosphogypsum. Leaching is carried out using a bacterial complex consisting of several types of acidophilic thionic bacteria in the active growth phase, adapted for active transfer into the liquid phase of phosphorus and rare-earth elements. Leaching is carried out in tank conditions with bacterial population of 107 cells/ml, solid-to-liquid ratio 1:5-1:9, active or moderate aeration and temperature 15-45°C for 3-30 days.
EFFECT: high efficiency of the process of recycling phosphogypsum using a cheap and an ecologically safe method.
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Authors
Dates
2012-07-27—Published
2010-10-26—Filed