METHOD FOR CLEANING OF MACROPOROUS SPACE OF BREAK AFTER ITS SULFURIC-ACID TREATMENT Russian patent published in 2010 - IPC E21B43/28

Abstract RU 2402680 C1

FIELD: mining.

SUBSTANCE: method for cleaning of macroporous space of break after sulfuric-acid treatment of residual or crushed hard rocks includes "flushing" of mudded rocks by low-mineralised (M up to 35 kg/m³) low-sulfuric-acid (H₂SO₄=1-5 kg/m³) process solutions as their traditional direction of motion in break changes. Chemical composition of flushing solutions is complemented with microadditive of humic fulvic acid complexon (50-100 g/m³).

EFFECT: secondary return of uranium into in-situ and heap leaching processes.

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Authors

Dates

2010-10-27—Published

2009-04-03—Filed