Results 241 to 250 of about 86,385 (292)

In-Situ Leaching Materials Considerations

SPE Annual Technical Conference and Exhibition, 1979
Abstract This paper presents a review of materials considerations associated with in situ mining processes for copper and uranium. Because the lixiviants employed are corrosive to ordinary oilfield equipment, special materials of construction for both surface and subsurface hardware are required.
Ray Huff, Donald Davidson
openaire   +1 more source

Evaluation of one‐dimensional in situ leaching processes

International Journal for Numerical and Analytical Methods in Geomechanics, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liu, J., Brady, B. H.
openaire   +2 more sources

Anaerobic thiosulfate leaching: Development of in situ gold leaching systems

Minerals Engineering, 2008
Ferric EDTA and ferric oxalate complexes are both effective oxidants for the aerobic and anaerobic dissolution of gold in thiosulfate solutions, and therefore are potential candidates for the development of an in situ leaching system. The thiosulfate and polythionates were quantified during leaching using HPLC with perchlorate eluent and an anion ...
J.A. Heath, M.I. Jeffrey, H.G. Zhang, J.A. Rumball   +3 more
openaire   +1 more source

In situ and dump leaching of phosphate rock

Industrial & Engineering Chemistry Research, 1988
Lixiviation par des solutions diluees de HCl et HNO 3 pour obtenir du monophosphate de ...
Fathi Habashi, Farouk T. Awadalla
openaire   +1 more source

Mathematical Modeling of In-Situ Uranium Leaching

Society of Petroleum Engineers Journal, 1979
Abstract This paper presents the development and results of a computer model of in-situ uranium leaching. This model uses a streamline-concentration balance approach and is useful with a wide range of reservoirs. It can be used with any type of well system, in a reservoir with or without boundaries, and with any ...
Paul M. Bommer, Robert S. Schechter
openaire   +1 more source

Recent Trends in Copper In Situ Leaching

Mineral Processing and Extractive Metallurgy Review, 1992
The recovery of copper by leaching techniques has been practiced for centuries. In the U:iited States at the present time approximately 25 percent of the primary copper production is derived frnm leaching activities. Most of this production results from massive dump and heap leaching activitie: associated with large open-pit mines. Historically a small
J. B. HISKEY, G. ONER, D. W. COLLINS
openaire   +1 more source

Thermodynamic modeling of the in situ leaching of uranium

Journal of Radioanalytical and Nuclear Chemistry, 2014
The thermodynamic model of uranium in situ leaching process at the stage of acidification was investigated. It was demonstrated that in the frontal zone of acid leaching solutions reduction of U(VI) up to U(IV) was possible due to the behavior of oxidation–reduction processes with the ferrous ions involved. At the same time uranium is precipitated as U(
A. M. Pastukhov, V. N. Rychkov, S. Yu. Skripchenko   +2 more
openaire   +1 more source

Feasibility of electrokinetic in situ leaching of gold

Hydrometallurgy, 2018
Abstract Conventional gold mining operations are facing significant challenges due to declining ore grades and increasingly higher strip ratios. To meet global demands while limiting associated environmental impacts, alternative techniques to extract resources, including gold, are urgently needed.
Evelien Martens, Henning Prommer, Xianwen Dai, Ming Zhi Wu, Jing Sun, Paul Breuer, Andy Fourie   +6 more
openaire   +1 more source

Selenium Leaching Kinetics and In situ Control

Mine Water and the Environment, 2011
Selenium leached from coal tailings and spoil is a challenge for mining operations in southern West Virginia. Selenium discharges are not supposed to exceed 5 μg/L, and yet are commonly in the range of 10–25 μg/L. Once in the selenate form, selenium removal can be extremely difficult and expensive, particularly in the narrow valleys and highly variable
P. F. Ziemkiewicz, M. O’Neal, R. J. Lovett   +2 more
openaire   +1 more source

Acid Leach Of Uranium Ore: In Situ Conditions

SPE Annual Technical Conference and Exhibition, 1979
Abstract Core samples from a property in Wyoming were tested for amenability to in situ leaching by acid ferric sulfate. In tests, about 95% recovery of the uranium was achieved. The ore is fortunately low in carbonate, and sulfuric acid consumption of 15#/T is expected using feed solutions of pH 1.8.
openaire   +1 more source