Results 131 to 140 of about 675 (179)

Lixiviants for primary gold and/or copper production

JOM, 2007
These days, when a s k e d “ W h a t exactly does a metallurgical engineer do?” the answer can range anywhere from mineral processing to chemical processing to material science. The answer you give is usually dependant on what area of the world you are in, which industry you are currently employed in, and where and in what decade you attended college ...
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Development of ammoniacal lixiviants for the in-situ leaching of chalcopyrite

Hydrometallurgy, 1995
Researchers at the U.S. Bureau of Mines are investigating the ammonia-oxygen leaching of chalcopyrite at conditions anticipated in an in-situ environment. Two major problems were identified in a review of the literature: (1) providing sufficient oxidant to drive the leaching reaction, and (2) decreased leaching kinetics due to the build-up of a ferric ...
Shawn L. Bell, Glenn D. Welch, Paul G. Bennett   +2 more
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Leaching of Glauconitic sand stone in acid lixiviants

Minerals Engineering, 1992
Abstract Laboratory studies have been conducted on acid leaching as a possible route for extraction of potassium from Glauconitic sandstone, a secondary source of potassium. The effect of temperature, concentration and type of acids, strirring speed and leaching time on potassium dissolution have been investigated.
V.P. Yadav, T. Sharma
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Dissolution Chemistry of Gold and Silver in Different Lixiviants

Mineral Processing and Extractive Metallurgy Review, 1988
Cyanide has been recognized for a long time as a powerful lixiviant for gold and silver, forming very stable cyano complexes with both metals.
J. BRENT HISKEY, V. P. ATLURI
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Lixiviation Oxydante du Sulfure de Cuivre

Bulletin des Sociétés Chimiques Belges, 1959
AbstractLa cinétique formelle de la réaction d'oxydation par l'oxygène du sulfure de cuivre en suspension dans l'eau a été déterminée pour différentes conditions expérimentales. En solution neutre la réaction est plus lente qu'en solution acide ou ammoniacale : la raison en est l'étape primaire de formation de soufre et de CuO.
J. Rygaert, J. Saelemaekers, A. van Tiggelen   +2 more
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Thiosulfate as an Alternative Lixiviant to Cyanide for Gold Ores

2016
Thiosulfate is generally considered to be an attractive alternative reagent to cyanide for processing gold. It is relatively inexpensive and nontoxic, forms strong gold and silver complexes, and readily leaches gold ores when catalyzed by Cu(II). Research over the past 30 years has focused mostly on the understanding and applying the copper-catalyzed ...
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Alternative Lixiviants to Cyanide for Leaching Gold Ores

2016
Over 25 alternative lixiviant processes to cyanide have been tested in the laboratory; some of which have been successful for niche applications. The process conditions, applications and current status of the most attractive are reviewed in this chapter with an emphasis on publications since 1995.
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Impacts of heterogeneous manure spreading on nitrate lixiviation

2008
L'étude évalue la répartition de trois épandeurs (Bon - moyen - mauvais) et dresse une carte de répartition du produit épandu. A partir de cette carte, des sous parcelles de répartition homogènes sont établies et servent de support à une simulation agronomique pour calcul de lessivage.
Thirion, Florence, Chabot, F.
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lixivious, adj.

2023
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lixiviate, v.

2023
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