A Critical Review of the Typical By-product Clean Ecology - US4702896A - Thermal treatment of phosphate rock - Google ...
A D} most of the phosphate (~95%) is processed by the "wet process and the P2O5 is rendered citrate soluble.Phosphate rock used for fertilizer is a major NORM due to both uranium and thorium. Phosphate is a common chemical constituent of fertilizer. It is principally mined from apatite and phosphate rocks (phosphorite) in which the concentration of phosphate has been enhanced by sedimentary,
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