By John Marsden
The Chemistry of Gold Extraction presents the vast base of data now required through all these operating within the gold extraction and gold processing industries. The e-book bridges the distance among learn and by way of emphasizing the sensible purposes of chemical rules and methods. The technical reference comprises in-depth discussions on ancient advancements; ore deposits and strategy mineralogy; procedure choice; ideas of gold hydrometallurgy; oxidative pretreatment; leaching; answer purification and focus; restoration; floor chemical tools; refining; effluent t. �Read more...
summary: The Chemistry of Gold Extraction offers the vast base of data now required by means of all these operating within the gold extraction and gold processing industries. The booklet bridges the distance among examine and via emphasizing the sensible purposes of chemical ideas and methods. The technical reference comprises in-depth discussions on ancient advancements; ore deposits and technique mineralogy; technique choice; ideas of gold hydrometallurgy; oxidative pretreatment; leaching; answer purification and focus; restoration; floor chemical tools; refining; effluent t
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Extra resources for Chemistry of Gold Extraction
CH. 2 SEC. 5 Gold with Sulfides Gold can occur as ultrafine (“invisible”) solid solution inclusions within sulfide mineral grain structures [5, 6]. , invisible) within the arsenopyrite. , 250 to 1,500 g/t ) are commonly encountered in practice. Hence the occurrence of gold in solid solution in sulfide minerals Copyright © 2009 Society for Mining, Metallurgy, and Exploration, Inc. All rights reserved. 2 Gradation of color of Au–Cu–Ag alloys. Courtesy of Academic Press  (especially arsenopyrite, pyrite, and pyrrhotite) is of major importance in many refractory gold systems.
The first CIP plant in Australia was commissioned at Kambalda in 1981. Other early Australian uses of CIP were at Norseman and Haveluck. Copyright © 2009 Society for Mining, Metallurgy, and Exploration, Inc. All rights reserved. [CH. 1 SEC. 3] HISTORICAL DEVELOPMENTS 13 As the application of the CIP process gained momentum, a number of associated technological developments took place. , EPAC, Kambalda, Derrick, NKM). Methods and equipment for on-site reactivation of carbon were improved throughout the 1980s, with continued controversy over the choice of reactivation kilns and stripping methods.
All rights reserved. [CH. 2 SEC. 1 Mechanisms and complexes that affect the precipitation of gold during ore-formation processes  Complexes Mechanism Pressure↓ Temperature↓ pH↑ Boiling Reduction by carbon Reaction with pyrite, aresenopyrite AuHS– Au(HS)2– AuCI2– Unknown No at temp. >250°C Unknown at temp. <250°C No, except when pH↓ No No Yes No Yes No No No Yes No Yes Yes Mostly yes Yes Yes The freezing and boiling points of gold are 1,064°C and 2,808°C, respectively. 3. Gold has a metallic luster, and the color is a distinctive deep yellow (golden) but may be light yellow or orange-yellow with high silver and copper contents, respectively.