FIELD: metallurgy.
SUBSTANCE: method includes grinding of raw materials up to fineness less than 0.074 mm. After grinding it is implemented leaching during 20-40 minutes at temperature 40-50°C 0.5-1.0 "н." by solution of oxalic acid at relation of liquid to solid in pulp 3:1 with transferring of phosphorus into solution. After leaching it is implemented pulp filtration.
EFFECT: selective dissolution of phosphorus from raw materials.
2 tbl, 1 ex
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