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ammonia in copper ore processing

(PDF) Ammonia Leaching: A New Approach of Copper

Abstract and Figures Ammonia and ammonium salts have been recognized as effective leaching agents in hydrometallurgical processes due to low toxicity and cost, easy

TREATMENT OF A COPPER - RICH GOLD ORE BY

2016-8-3 · In this study, ammoniacal cyanide leaching of gold for the treatment of a copper-rich refractory gold ore was investigated. Ammonia leaching as a process ahead of cyanidation was also examinedpretreatment . Some additives were testedto reduce the copper interferences. Direct cyanide leaching of gold was carried out for comparison.

(PDF) Treatment of a Copper-Rich Gold Ore by Ammonia ...

The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated. Dissolution behaviour of gold and copper

Ammonia Leaching: A New Approach of Copper Industry

2013-12-10 · 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.

Characterization and kinetic study on ammonia leaching

2014-6-3 · Mineralogical characterization of the copper ore sample reveals that siderite is the major phase and chalcopyrite is the main sulfide mineral. Ammoniacal leaching using O2 gas under pressure is a feasible treatment route for this ore for selective dissolution of copper. Copper leaching rate is strongly influenced by temperature, NH3 concentration and particle size whereas oxygen partial pressure has moderate influence up to about 203 kPa. Under standard leaching

Industrial Application of Ammonia Assisted Cyanide ...

2017-2-17 · The use of ammonia to reduce the consumption of cyanide during the leaching of gold from copper-bearing ores was patented in 1902 by Bertram Hunt (Hunt 1902), during the first period of intense R&D activity in gold metallurgy that followed the invention of the cyanide process by J.S. MacArthur and the Forrest brothers in the late 1880s. The ammonia-cyanide process was used commercially by Hunt to treat tailings from the Comstock Lode in Nevada and cupriferous gold ore at Dale, California. After the First World War, interest in the Hunt process

Treatment of copper-rich gold ore by cyanide leaching ...

Ammonia pretreatment is shown to readily eliminate the copper interference, allowing almost complete extraction of gold with concomitantly low reagent consumption in subsequent cyanide leaching. In ammoniacal cyanide system, Box-Behnken experimental design shows the main and interaction effects of NH 3, NaCN and Pb (NO 3) 2.

Studying on Leaching Process of African Copper Oxide Ore ...

2021-8-10 · Studying on Leaching Process of African Copper Oxide Ore by Ammonium Carbonate Solution SONG Zhi-peng, HU Guo-rong, PENG Zhong-dong, ZHOU Yu-lin School of Metallurgical Science & Engineering, Central South University, Changsha 410083, Hunan

Gold-Copper Ores - ScienceDirect

2016-1-1 · As expected, the copper in the circuit reduced to a low level, but when sulfide copper–gold ore processing resumed, the copper concentration in the leach circuit did not attain previous levels even though a higher copper orebody was being mined. The copper recovery plant was operated intermittently for a few months and was eventually shut down.

Eliminating Copper from Gold Ore

2015-10-11 · 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 cyanide The Hunt method-calls for the direct treatment of the ore with a solution of potassium cyanide to which ammonium hydroxide has been added.

Ammonia Leaching: A New Approach of Copper Industry

2013-12-10 · 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 metals. New research findings on considerable advantages of leaching by these agents and elimination of problems associated with acid leaching have resulted in a new approach in the world to this method.

Ammonia leaching of slag from direct-to-blister copper ...

2020-8-25 · Smelting of copper concentrates in a flash furnace directly into a copper blister results in the production of slag with high copper and lead content. The recovery of these metals is carried out in an electric furnace, from which copper–lead–iron metallic alloy is then processed in a converter furnace. In the presented work, copper and lead extraction studies were carried out by ...

Efficient Synchronous Extraction of Nickel, Copper, and ...

2020-6-18 · Characterization and kinetic study on ammonia leaching of complex copper ore. Transactions of Nonferrous Metals Society of China 24 , 1587–1595 (2014). CAS Article Google Scholar

Leaching kinetics of low-grade copper ore containing ...

2012-11-28 · The oxidized copper ore from Yunnan province in China was ground into different particle sizes of 0.037, 0.045−0.063, 0.074−0.100, 0.150−0.180, 0.250−0.300 mm. The chemical analysis and X-ray diffraction pattern of the copper ore are given in Table 1 and Fig. 1, respectively. The content of copper in the ore is too low

Studying on Leaching Process of African Copper Oxide Ore ...

2021-8-10 · Studying on Leaching Process of African Copper Oxide Ore by Ammonium Carbonate Solution SONG Zhi-peng, HU Guo-rong, PENG Zhong-dong, ZHOU Yu-lin School of Metallurgical Science & Engineering, Central South University, Changsha 410083, Hunan

LEACHING OF MALACHITE ORE IN AMMONIUM SULFATE

Abstract. Malachite ore is one of the most important of oxidized copper ores. Copper production can be performed by using this ore. In this work, the leaching kinetics of malachite in ammonium sulfate solutions was investigated, and metallic copper was recovered by a

Environmental Guidelines for Nickel Smelting and Refining

2018-8-5 · ammonia or sulfuric acid leach are also used. Ammonia leach is usually applied to the ore after the reduction roast step. Sulfidic ore processing Modern technology uses electric smelting or flash smelting. Flash smelting is the most common process but electric smelting is used for more complex raw materials when increased flexibility is needed.

Ammonia Removal from Mine Impacted Waters | BQE Water

2018-9-26 · Ammonia Removal from Mine Impacted Waters. September 26, 2018. Ammonia is a nitrogen compound that is found in nature in trace amounts, most notably as a waste by-product when microorganisms utilize nitrogen gas or from the decomposition of organic waste. It is also produced industrially for use in fermentation, fertilizers, cooling systems ...

A reviewofcopperhydrometallurgy - SAIMM

2009-8-26 · that the custom processing ofcon-centrates to refined copper in a large smelter may cost about 15 South African cents perkilogram of copper, direct operating costs being aslowas7to10cents. The philosophy that, because many smelters are situated in re-moteareas, particularly inacountry likeSouth Africa, the abatement of sulphur dioxide pollution ...

Molybdenum: mining and processing-Metalpedia

Molybdenum: mining and processing; Mining; Molybdenum can be found in a number of minerals, but only molybdenite is suitable for the industrial production of marketable molybdenum products. Molybdenite can occur as the sole mineralization in an ore body, but is usually associated with the sulphide minerals of other metals, mainly copper.Molybdenum mines are classified into three groups ...

Ammonia leaching of slag from direct-to-blister copper ...

2020-8-25 · Smelting of copper concentrates in a flash furnace directly into a copper blister results in the production of slag with high copper and lead content. The recovery of these metals is carried out in an electric furnace, from which copper–lead–iron metallic alloy is then processed in a converter furnace. In the presented work, copper and lead extraction studies were carried out by ...

Efficient Synchronous Extraction of Nickel, Copper, and ...

2020-6-18 · Characterization and kinetic study on ammonia leaching of complex copper ore. Transactions of Nonferrous Metals Society of China 24 , 1587–1595 (2014). CAS Article Google Scholar

SciELO - Brasil - LEACHING OF MALACHITE ORE IN

Besides, ammonia forms stable complexes with copper ions, and this can lead to an increase in the dissolution rate of copper from ore. Thus, ammonia allows for selective extraction of the copper from ore, leaving the undesired components in the residue (Blanco et al., 1999 Blanco, L. J. L., Zapata, V. F. M., Garcia, D. D. J., Statistical ...

The selective leaching of copper from a gold–copper ...

2020-12-11 · cyanide and ammonia have detrimental environmental effects. Muir et al. (1989) reported that there arefive methodologies for treating copper–gold ores: (1) float and produce a copper–gold con-centrate for smelting; (2) selectively mine and cyanide leach ore with b0.5% Cu as oxidised minerals andb1% as sulphidic minerals;

Sulfidisation Promotion Effect of Ammonium Sulfate on ...

This paper presents the sulfidisation promotion effect of ammonium sulfate on the sulfidisation flotation of both malachite and copper oxide ores. Copper oxide ores are commonly difficult-to-float due to its molecular structure, and adding sodium sulfide as activator is necessary; however, its dosage to the flotation pulp must be strictly controlled, as it is also a powerful depressant for ...

Environmental Guidelines for Nickel Smelting and Refining

2018-8-5 · ammonia or sulfuric acid leach are also used. Ammonia leach is usually applied to the ore after the reduction roast step. Sulfidic ore processing Modern technology uses electric smelting or flash smelting. Flash smelting is the most common process but electric smelting is used for more complex raw materials when increased flexibility is needed.

Enhanced methods for nickel recovery from low-grade

2021-8-14 · From here, there is further leaching to remove iron and copper, and finally precipitation of nickel by addition of ammonia, ammonium sulfate, and hydrogen. An excellent example the use of PAL on low-grade lateritic nickel ores is the Ambatovy

A comprehensive study of the leaching behavior and ...

2021-8-2 · the leaching process of copper oxide ore. Moreover, an experimental design technique, Response Surface Method (RSM), is employed to model, optimize, and evaluate the e ects and interactions of the in uential parameters on recovery of copper. 2. Experimental descriptions 2.1. Materials Copper oxide ore was collected from the Fariman copper mine ...

Copper Mining and Processing: Processing Copper Ores ...

Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for everyday use.The most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and pyrometallurgy, respectively, due to the different ...

A reviewofcopperhydrometallurgy - SAIMM

2009-8-26 · that the custom processing ofcon-centrates to refined copper in a large smelter may cost about 15 South African cents perkilogram of copper, direct operating costs being aslowas7to10cents. The philosophy that, because many smelters are situated in re-moteareas, particularly inacountry likeSouth Africa, the abatement of sulphur dioxide pollution ...