EXTRACTION METHOD OF NATURAL URANIUM CONCENTRATE FROM SULPHURIC ACID SOLUTIONS OF UNDERGROUND LEACHING, AND PLANT FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC C22B60/02 C22B3/24 

FIELD: metallurgy.

SUBSTANCE: method involves use of an unbalanced solution consisting of a solution from the washing process of anionite from the acid and filtrate from the filter press, and their removal from the process together with a mother solution from deposition of natural uranium concentrate through an additional saturation operation together with a marketable reclaimed product. For that purpose, the plant includes a local solution recirculation circuit in the form of a collector for solutions of unbalanced and mother concentrate from deposition, which is connected to pipelines of the above solutions and equipped with solution supply pipelines attaching the collector through a gravity tank to an additional saturation column from the marketable reclaimed product and to a solution return pipeline attaching the gravity tank to the solution collector of the local solution recirculation circuit.

EFFECT: reduction of nitrate ions emissions; reduction of prime cost of end product and compliance with strict environmental requirements.

2 cl, 2 dwg, 1 tbl, 2 ex