Ammonia leaching was ﬁrst used for recovery of non ferrous metals such as copper from oxide ores or ores containing pure copper but gradually the use of this technology was developed from moreGet Price
Capacity: 0.18-7 (m ³/min)
Suitable Materials: Copper, zinc, lead, nickel, gold and other non-ferrous metals, ferrous and non-metal.
Major Equipment: Jaw crusher, ball mill, sprial classifier, flotation machine, concentrator machine and dryer machine
Feeding Size: ≤25mm
Production Capacity: 200t/d-8,000t/d
Technological Features: Crushing raw materials, pre-homogenizing materials, arranging ingredients, efficient grinding, homogenizing materials, suspending pre-heater and decomposing furnace, new type cooler, cement dosing and grinding.
Feeding size: 480-850mm
Processing capacity: 45-500t/h
Applied material: river pebbles, rocks (limestone, granite, basalt, diabase, andesite, etc.), ore tailings.
Feeding Size: 65-300mm
Discharging Size: 3-60mm
Production Capacity: 12-1000t/h
Rotation Speed: 0.1–5 r/min
Production Capacity: 180-10000t/d
Product Specification: Φ2.5×40m-Φ6.0×95m
Processing Capacity: 2-30TPH
Application Area: Refractories, power plants, metallurgy, chemical industry, energy, transportation, heating.
Applied Materials: Coal, bentonite, clay, kaolin, coke, aluminum, iron, iron oxide skin, toner, slag, gypsum, tailings, sludge, kaolin, activated carbon, coke, powder, scrap, waste, etc.
Ammonia leaching is also selective in that it will not dissolve all available nonspecific metals such as iron and manganese along with the copper or cobalt as sulphuric acid does Ammonia leaching can be used in nonoxidative oxidative and reductive leaching 16 The ammonia leaching process is more environment friendly thanMore Detail
Dec 10 2013 · Ammonia Leaching A New Approach of Copper Industry in Hydrometallurgical Processes Abstract Ammonia and ammonium salts have been recognized as effective leaching agents in hydrometallurgical processes due to low toxicity and cost easy recovery and high selective recovery of metalsMore Detail
improved to 90 Similarly the pretreatment of the ore by ammonia leaching was shownto lead to high gold extractions 98 in subsequent cyanide leaching with significant reductions in the consumption of cyanide This appeared to be linked with the ready dissolutionremoval of copperMore Detail
In general the major advantage of ammonia leaching process lies in its selectivity towards copper since ammonia forms soluble ammine complex with Cu ions and iron is completely rejected as iron oxides Aqueous ammonia as a leaching agent is fairly noncorrosive and leaching reactions occur in relatively mild conditions 9More Detail
Abstract The alkaline leaching behaviour of rich copper cobalt oxidised ore from Katanga has been investigated Copper was leached in ammonianitric acid solution at room temperature The effects of time ammonia concentration nitric acid ammonia ratio and pH on the leaching kinetic of copper were investigated NitricMore Detail
May 15 2015 · An extensive literature survey on the principles and applications of ammonia leaching processes in hydrometallurgy is presented in this paper The combination of ammonia anal ammonium salts is known to be a powerful lixiviant used in hydrometallurgical processes Many metals can be extracted using the mixture of ammoniaammoniumMore Detail
leaching ranges between 200 and 300 mV vs SHE In the absence of ammonia or with excess copper Cu2 ions react with thiosulfate forming CuS 2 O 3and S 4 O 6 2ions Byerley et al 1973 Rabai and Epstein 1992 Zhang and Nicol 2003 The chemistry of thiosulfate leaching isMore Detail
The copper and ammonia are recovered from the preliminary leach solution by distillation the copper remaining as an oxide precipitate The success of this process will depend largely upon the relatively complete solubility in ammonia of those copper minerals which dissolve in cyanide Chemical reaction of copper minerals and cyanideMore Detail