leaching copper sulfide with ammonia

COPPER(II) EXTRACTION FROM AMMONIA LEACH SOLUTION

Ammonia leaching of sulfide copper concentrates generate buffer type liquors (pH ranges from 9 to 10), because of the excess of ammonia and significant amount of ammonia sulfate as a leaching agent. Metals such as Cu, Ni, Co and Zn occur in ...

The leaching of silver sulfide with the …

 · Silver leaching was found to increase accordingly with the copper and thiosulfate and to decrease with increments in the ammonia concentration. This behavior is believed to be caused by the free cuprous to free silver ion ratio at the reaction boundary.

The leaching of a chalcopyrite concentrate in ammonia …

K. SARVESWARA RAO, The Role of Solids Characterisation Techniques in the Evaluation of Ammonia Leaching Behaviour of Complex Sulphides, Mineral Processing and Extractive Metallurgy Review, 10.1080/08827509908962484, 20, 1, (409-445), (2000).

Leaching Copper Ammonia

 · Leaching Copper Ammonia A low grade copper flotation tailing from telfer containing 12 cu as chalcocite and cuprite and 5 gtt au was leached with ammonia cyanide and ammoniacyanide mixtures to extract copper andor gold direct cyanidation extracted both ...

(PDF) Treatment of a refractory gold—copper sulfide …

Treatment of a refractory gold—copper sulfide concentrate by copper ammoniacal thiosulfate leaching . × Close Log In Log In with Facebook Log In with Google Sign Up with Apple or Email: Password: Remember me on this computer or reset password ...

COPPER(II) EXTRACTION FROM AMMONIA LEACH SOLUTION

Ammonia leaching of sulfide copper concentrates generate buffer type liquors (pH ranges from 9 to 10), because of the excess of ammonia and significant amount of ammonia sulfate as a leaching agent. Metals such as Cu, Ni, Co and Zn occur in ammonia systems as a cationic amminacomplexes. Alkalinity of the solution and free ammonia concentration affect route of extraction (Miller et al., 1981).

leaching copper ammonia

Chalcopyrite Leaching by Iodine Commercial scale ammonia leaching of copper sulfide concentrates has been accomplished. The Arbitter process (Kuhn et al., 1974) is carried out at 60 to 90 C with an oxygen pressure of 5 to 40 psig. Get Price leaching of copper

ammonia leaching of copper

ammonia leaching of copper product list K Series Mobile Crushing Plant Mobile Vibrating Screen Belt Conveyer Sand Washing Machine S5X Series Vibrating Screen GF Series Vibrating Feeder Ball Mill Raymond Mill MW Series Micro Powder Mill LM Vertical ...

Ammonia leaching of copper sulfide concentrates. | …

Article "Ammonia leaching of copper sulfide concentrates." Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and technology information which hitherto stood alone to support the generation ...

Improving of copper extraction from chalcopyrite by using NaCl | …

 · ARBITER N, MCNULTY T. Ammonia leaching of copper sulfide concentrates [C]// Copper 99-Proceedings of the Fourth International Conference Phoenix Arizona, USA: CIM, TMS, 1999: 197–212. Google Scholar [3] BALAZ P. Mechanical activation in

CA1153984A

AMMONIA LEACHING Abstract-of the Disclosure An improved process for obtaining copper from a copper sulfide, in which: the copper sulfide is treated with oxygen and an aqueous leaching solution of ammonium carbonate, to form a leach liquor which ...

(PDF) Ammonia Leaching: A New Approach of Copper …

by Sherritt Gordon. In this process, ammonia leaching of. sulfide minerals of copper, nickel, cobalt and iron was. conducted at a temperature of about 105 ° C and air pres-. sure of 0.8 MPa ...

(PDF) Ammonia leaching in the copper industry: a review

In this process, ammonia leaching of sulfide minerals of copper, nickel, cobalt and iron was conducted at a. temperature of about 105 °C and air pressure of 8 ATM. Under these c onditions, copper ...

ammonia leaching of copper pollution

Ammonia leaching of sulfide copper concentrates generate buffer type liquors (pH ranges from 9 to 10), because of the excess of ammonia and significant amount of ammonia sulfate as a leaching agent. Metals such as Cu, Ni, Co and Zn occur in ammonia systems as a cationic amminacomplexes.

Copper Sulfide Leaching by Ammoniac to recover Sulfur

 · This ratio remained constant over virtually the entire leaching time and indicates that the rate of sulfur extraction as elemental sulfur parallels very closely the rate of copper dissolution. Further, it suggests strongly that very little oxidation of the …

Direct Leaching of sulfides: Chemistry and applications …

The sulfide minerals associated with copper, nickel, zinc, lead, and molybdenum concentrates are described according to their thermodynamic stability zones on Eh-pH diagrams. From these zones, the chemistry associated with various thermodynamically feasible decomposition paths is discussed, and process developments associated with the most favorable decomposition paths are briefly reviewed.

Thu Leaching Of Copper From Tailings Using Ammonia

Copper recycle from sulfide tailings using combined A comparison leaching with alkaline bacteria ammonia or a combination of the two clearly indicated that copper recovery was remarkably better with combination that Cu extraction rate increased from 442 48 days ...

Silver sulfide leaching with a copper-thiosulfate solution in …

 · Leaching from silver sulfide using a copper-thiosulfate solution in the absence of ammonia was investigated. It is found that silver sulfide could be effec Silver sulfide leaching with a copper-thiosulfate solution in the absence of ammonia | SpringerLink

[PDF] Gold leaching by copper(II) in ammoniacal …

Gold leaching in thiosulphate media has attracted renewed interest of many researchers over the last three decades due to fast kinetics in the presence of some oxidants/ligands and its adaptability to gold ores which are unsuitable for direct cyanidation. The acidity (pH) and the concentrations of copper(II), ammonia, thiosulphate and polythionates produced by the reaction between copper(II ...

Copper recycle from sulfide tailings using combined …

 · Ammonia leaching from copper sulfide tailings A 30-days ammonia leaching experiments of sulfide tailings with different concentration of ammonia was carried out in a sterile environment. Changes in the key parameters (i.e., pH and Cu extraction rate) during ammonia leaching with increasing concentrations of NH 3 are shown in Fig. 4.

The leaching of metal sulfides in ammoniacal carbonate …

The leaching kinetic data for cobalt from monometallic cobalt sulfide, showed that the process follows the surface reaction model similar to copper, with a steady activation energy of 6.5 kJ/mol. In contrast to nickel, the leaching of cobalt from cobalt sulfide had a higher order with respect to ammonium carbonate of 1.8 than with respect to ammonia of 0.9.

Oxidation of copper sulfides in aqueous ammonia

An empirical rate equation k [p 02] 0.45 [nh3] 0.7 for the oxidation of CuS in aqueous ammonia was obtained. The reactions of copper sulfide in aqueous ammonia were also studied electrochemically. These studies were related to both the formation of elemental sulfur and the extraction of copper during oxidative leaching of copper sulfides in ...

Copper-Ammonia Complex | Chemdemos

Discussion. The copper ion in the aqueous solution of exists predominantly as [Cu (H 2 O) 6] 2+. This complex ion imparts a characteristic pale blue color to the solution. Since ammonia is a weak base, when it is added, hydroxide ion forms: NH 3 ( aq) + H 2 O ( l) <==> NH 4+ ( aq) + OH - ( aq ); pK b = 9.25 (1) The hydroxide ion reacts with the ...

Ammonia Leaching: A New Approach of Copper Industry in …

 · In this process, ammonia leaching of sulfide minerals of copper, nickel, cobalt and iron was conducted at a temperature of about 105 C and air pressure of 0.8 MPa. Under these conditions, copper, nickel and cobalt were dissolved but iron was precipitated in hydroxide form.

US4165264A

An improved process for obtaining copper from a copper sulfide, in which: the copper sulfide is treated with oxygen and an aqueous leaching solution of ammonium carbonate, to form a leach liquor which contains ammonia complexes of copper sulfate and copper ...

US2727819A

229910052802 copper Inorganic materials 0.000 title claims description 51 1951-12-01 Method of leaching sulfide copper materials with ammoniacal solvent

Leaching of Copper Sulphides

for copper sulphides. Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. Ferric sulphate leaching and copper chloride leaching are carried out atplace at

COPPER(II) EXTRACTION FROM AMMONIA LEACH SOLUTION

Leaching of Copper Sulphides - SAIMM

The Leaching of Cupric Sulfide in Ammonia | Industrial & …

Leaching kinetics of low-grade copper ore containing calcium-magnesium carbonate in ammonia-ammonium sulfate solution with persulfate. Transactions of Nonferrous Metals Society of China 2012, 22 (11), 2822-2830.

ammonia leaching methods of copper

The spent copper chromium oxide catalyst of furfural hydrogenation was recycled ammonia leaching method. This method not only has the characteristics of simple process, low cost, quick effect, but also avoids the use of various oxidants increasing the security of the experimental operation and the generation of carcinogen hexavalent chromium.The experimental results show that the optimum ...

Leaching Copper Ammonia

Patent US5308381 Ammonia extraction of gold and silver from May 3, 1994 Leaching of copper, nickel and cobalt using ammoniaammonium salts material and the tailing could be subjected to leaching. Rotating disc studies on pure gold and copper are reported

Leaching Copper Ammonia

Leaching Copper Ammonia Aug 03 2010nbsp018332Abstract The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammoniaammonium chloride solutions has been studied The tailings belong to a lowgrade and ...

Characterization and kinetic study on ammonia leaching of complex copper …

Abstract: Ammonia leaching kinetics of a complex Cu-ore assaying 8.8% Cu and 36.1% Fe was examined. Mineralogical characterization indicated that the major phase of the ore was siderite with chalcopyrite as the major sulfide mineral.

Silver sulfide leaching with thiosulfate in the presence of …

 · The leaching of silver sulfide by a copper–ammonia thiosulfate solution occurs either by the substitution of cupric or cuprous for silver. The cupric reaction is favored due to a thermodynamic barrier to the cuprous reaction.

Selective Removal of Zinc from BOF Sludge by Leaching …

 · The leaching process was optimized in terms of the liquid-to-solid ratio, total ammonia concentration, ammonium:ammonia molar ratio, temperature, and leaching time. The co-dissolved iron was precipitated as a hydroxide after oxidation of ferrous to ferric ions by an air stream, without co-precipitation of zinc, while the dissolved zinc could be easily recovered as zinc sulfide by precipitation ...

(PDF) Copper recycle from sulfide tailings using …

PDF | On Apr 1, 2018, Shenghua Yin and others published Copper recycle from sulfide tailings using combined leaching of ammonia solution and alkaline bacteria | Find, read and ...