| 摘要 |
A method for the in situ leaching of a subterranean mineral (e.g. uranium) deposit which permits the use of downflow ion exchange columns without requiring expensive filtration equipment to remove particulate material and/or sediment from the leach solution. The injection and production wells are gravel packed so that all of the heavier particulate material will be filtered from the leach solution as it flows into the production well. The bed of ion exchange resin in the downflow column is then used to filter the finer sediment from the leach solution as the resin adsorbs the uranium from the leach solution. The barren leach solution from the ion exchange column can be used to makeup fresh leach solution without any further filtration. The loaded resin is removed from the ion exchange columns and is screened to remove the fine sediment. The resin is then eluted and screened again to remove any sediment that may accumulate during elution.
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