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Title: Acid pre-treatment method for in situ ore leaching

Abstract

An acid leaching method is described for the recovery of a desired element from a subterranean rubblized body of primary ore containing the element and also having associated therewith a carbonate mineral wherein the rubblized ore body is flooded with an aqueous acidic solution in order to release carbon dioxide from the associated carbonate mineral. After a substantial portion of the available carbon dioxide is released and removed from the ore body, as by venting to the atmosphere, an oxidizing gas is introduced into the flooded, rubblized ore to oxidize the ore and form an acid leach solution effective in the presence of the dissolved oxidizing gas to dissolve the ore and cause the desired element to go into solution. The leach solution is then circulated to the surface where the metal values are recovered therefrom.

Inventors:
;
Issue Date:
OSTI Identifier:
4031010
Patent Number(s):
3915499
Assignee:
to U.S. Energy Research and Development Administration
Patent Classifications (CPCs):
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
NSA Number:
NSA-33-025401
Resource Type:
Patent
Resource Relation:
Patent File Date: 1974 Jul 23; Other Information: E21B43/28; E21C41/14. Orig. Receipt Date: 30-JUN-76
Country of Publication:
United States
Language:
English
Subject:
N40140* -Chemistry-Separation Procedures; 400105* -Chemistry-Analytical & Separations Chemistry- Separation Procedures; *COPPER ORES- LEACHING; CARBON DIOXIDE; MINERALS; NUCLEAR EXPLOSIONS; SULFIDES; UNDERGROUND EXPLOSIONS

Citation Formats

Mallon, R G, and Braun, R L. Acid pre-treatment method for in situ ore leaching. United States: N. p., 1975. Web.
Mallon, R G, & Braun, R L. Acid pre-treatment method for in situ ore leaching. United States.
Mallon, R G, and Braun, R L. Tue . "Acid pre-treatment method for in situ ore leaching". United States.
@article{osti_4031010,
title = {Acid pre-treatment method for in situ ore leaching},
author = {Mallon, R G and Braun, R L},
abstractNote = {An acid leaching method is described for the recovery of a desired element from a subterranean rubblized body of primary ore containing the element and also having associated therewith a carbonate mineral wherein the rubblized ore body is flooded with an aqueous acidic solution in order to release carbon dioxide from the associated carbonate mineral. After a substantial portion of the available carbon dioxide is released and removed from the ore body, as by venting to the atmosphere, an oxidizing gas is introduced into the flooded, rubblized ore to oxidize the ore and form an acid leach solution effective in the presence of the dissolved oxidizing gas to dissolve the ore and cause the desired element to go into solution. The leach solution is then circulated to the surface where the metal values are recovered therefrom.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1975},
month = {10}
}