Results 111 to 120 of about 14,611 (161)

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
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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
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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
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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
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Restoration of Uranium In-Situ Leaching Sites

Society of Petroleum Engineers Journal, 1980
Abstract In recent years in-situ leach mining has emerged as a new technology for the recovery of uranium from strata that cannot be mined economically by other means. Because the ore bodies lie within groundwater aquifers, a significant determinant in the process' viability is the requirement that such aquifers be protected from ...
A. D. Hill, I. H. Silberberg, M. P. Walsh, W. M. Breland, M. J. Humenick, R. S. Schechter   +5 more
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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
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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

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
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BIOACTIVATION OF LEACHING SOLUTION FOR URANIUM IN-SITU RECOVERY

SGEM International Multidisciplinary Scientific GeoConference� EXPO Proceedings, 2022
Technology of in-situ recovery (ISR) of uranium is using in Kazakhstan for increasing of production 15 times from 800 ton in 1998 till 22 000 ton in 2013. This ISR process is zero wastes technology. Investigations showed serious potential to improve results of ISR technology using biotechnology methods.
Yerkin Bektay, Gaukhar Turysbekova, Erzhan Mukanov, Akmurat Altynbek, Bauyrzhan Shiderin   +4 more
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Controlled microbiological in-situ stope leaching of a sulphidic ore

Applied Microbiology and Biotechnology, 1993
A mixed culture of Thiobacillus ferrooxidans, T. thiooxidans, and Leptospirillum ferrooxidans was used for inoculation of a sulphidic ore body for a bacterial in-situ stope-leaching experiment in the Ilba mine in Romania. The ore body was inoculated with 107 cells/g ore.
Sand, Wolfgang, Hallmann, Regine, Rohde, Katrin, Sobotke, Birgit, Wentzien, Susanne   +4 more
openaire   +1 more source