Permeability restoration and lowering of uranium leakage from le

Details Permeability restoration and lowering of uranium leakage from le Permeability restoration and lowering of uranium leakage from le

1980-01-03

1981-06-02

Purser, Ernest R.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Dissolving or chemical reaction

423 15, E21B 4328

Patent

active

042708028

ABSTRACT:
The injection of an ammonium sulfite or bisulfite solution increases the permeability of an uranium ore bed that has suffered permeability losses during the in-situ mining of uranium with an alkaline leach solution containing a peroxide or dissolved oxygen oxidant. Such an injection recovers much of the lost formation permeability, thus decreasing costs and effort required to put needed restoration solutions or further leach solutions through the ore bed. In addition, uranium contamination of the ground water normally occurring after cessation of leaching is significantly lowered by such injection.

REFERENCES:
patent: 4155982 (1979-05-01), Hunkin et al.

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