Copper smelter slag treatment by ammonia solution: Leaching …

The feasibility of copper smelter slag processing by ammonia solution treatment was investigated. The central composite rotatable design (CCRD) and approximation method were used to determine the optimum conditions of zinc and copper recovery to a solution. The experimental design was done at five levels of the four operating parameters which were the …

Copper-Ammonia Complex | Chemdemos - University of Oregon

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 ...

COPPER HYDROMETALLURGY AND EXTRACTION FROM …

LIX 860, to extract copper from its chloride solution and to transfer it to the sulphate electrolyte. Tliis system has important positive features over that of Kyuchoukov^ in which a mixture of trioctylamine and LIX 54 was used. Taking into account that hot water strips effectively copper from loaded ACORGA CLX-50 solution, the washing of the ...

Download Ebook Electrowinning Copper From Chloride …

copper electrowinning from cupric chloride solution. The electrowinning of copper from a cupric chloride ... Abstract. There are several references to electrowinning copper from chloride solutions (e.g. 1-4), the copper being recovered in powder form. Ashcroft (5) and Hazen (6) have mentioned the possi-

Recovery of value metals from copper smelter slag by ammonium chloride …

DOI: 10.1016/J.MINPRO.2013.07.009 Corpus ID: 54814938; Recovery of value metals from copper smelter slag by ammonium chloride treatment @article{Nadirov2013RecoveryOV, title={Recovery of value metals from copper smelter slag by ammonium chloride treatment}, author={Rashid K. Nadirov and Leila I. Syzdykova and …

Leaching kinetics of copper flotation tailings in aqueous …

The experiments of agitation leaching were carried out in aqueous ammonia/ammonium carbonate solution, to recover copper from the flotation tailings of waste copper oxide residue. The main copper...

Ammonia Gold Dissolution Leaching - Metallurgist & Mineral …

Analytical grade chemicals were used throughout the study. Ammonia and Ammonium sulfate were used as lixiviants. The pH of the solution was adjusted by changing the ratio of ammonium ions (NH4+) to free ammonia (NH3). The pH of the solution was measured at room temperature and unless otherwise mentioned, this value was kept constant at 10.2.

Use of Ammonia Salts in Selective Copper Extraction from Tailings ...

Request PDF | Use of Ammonia Salts in Selective Copper Extraction from Tailings | Tailings (flotation waste) that is formed during copper production may be considered in the class of valuable ...

Ammoniacal System Mechanisms for Leaching Copper from …

In pyrometallurgical processes refining copper, the main source of loss in the conversion stage is from slag. This paper reports on research work treating converter slag containing high percentages of copper (36 wt%) using ammonium hydroxide at room temperature. Variables analyzed are solution pH, agitation, temperature, NH4OH …

Thermodynamic Research of Leaching Copper Oxide Materials with Ammonia …

The solubilities of copper hydroxide Cu(OH) 2, copper oxide CuO, atacamite Cu(OH) 1.5 Cl 0.5, malachite Cu 2 (OH) 2 CO 3 and chessylite Cu 3 (OH) 2 (CO 3) 2 in an ammonia-ammonium chloride-water solution were calculated using an exponential computation method based on both mass balance and charge balance equations. The range …

Investigation of leaching behaviour of pre-concentrated copper …

Investigation of the leaching behaviour of near infrared sensor-based pre-concentrated and classified copper ore samples in ammonium chloride solution was studied to understand the trend in copper extraction. The mineralogical and chemical content of the ore was evaluated using QEMSCAN® and ICMPMS techniques. The effects of leaching ...

Copper recycle from sulfide tailings using combined leaching of …

In this study, a cleaner metal extraction method for sulfide tailings using combined leaching with an ammonia solution and novel alkaline bacterium was proposed to solve the previously mentioned problems. Based on our findings, the following conclusions can be drawn: • Based on the 16s rDNA sequence, a novel strain of alkaline Acknowledgements

Selective leaching of copper and zinc from primary ores and …

To identify which material sources could be suitable for leaching with ammonia, a preliminary screen of eight primary and secondary materials was performed with both synthetic and biogenic ammonia poised at a total ammonia concentration of 1 mol L −1.After a contact time of 24 h, target metals Cu, Zn or Ni generally dominated in the pregnant solution (Fig. 1, …

Hydrometallurgy Abstracts - COPPER 2022

2 Investigations on the selective reduction of arsenic from copper concentrates by alkaline sulfide leaching Karsten Meiner, Weigelt, Alexandra Thiere, Michael Stelter, Alexandros

Leaching of copper from tailings using ammonia/ammonium chloride ...

The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammonia/ammonium chloride solutions has been studied. The tailings belong to a low-grade and high-alkaline copper ore. The effect of leaching time, the concentration of ammonia, solid/liquid ratio and temperature were investigated.

Ammonia Leaching: A New Approach of Copper Industry in

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 …

Selective leaching of a copper ore by an electromembrane process using …

2.2.. Conventional leachingAll conventional leaching experiments were performed using 30 g of ore with grain size lower than 200 μm.Mixtures of ammoniac and ammonium chloride were used as leaching reagents to obtain a buffered solution at …

Ammonia Leaching: A New Approach of Copper Industry in ...

Leaching of copper from tailings using ammonia–ammonium chloride solution and its dynamics Ammonia– ammonium chloride Leaching time, the concentration of ammonia, solid/ liquid ratio and ...

ammonium hydroxide copper leach - tablehyme.co.za

(PDF) Copper(II) extraction from ammonia leach solution. Ammonium salts and other complex forming reagents are widely used for leaching copper from high gangue complex ores (Ekmekyapar et al., 2012; Ochromowicz et al., 2014). The recovery process of . ammonia-ammonium chloride leach copper … Read More

Selective Acid Leaching of Copper and Zinc from Old Flotation Tailings …

The first sample of flotation tailings contained 0.26% of copper, 0.22% of zinc, and 17.4% of iron;; while the second sample contained 0.36% of copper, 0.23% of zinc, and 23.2% of iron. Percolation leaching made it possible to extract up to 43 …

The Principles and Applications of Ammonia Leaching of …

Abstract 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 ammonia/ammonium. The …

Comparison and evaluation of vanadium extraction from the …

The ammonium carbonate leaching performs better in selectivity over the vanadium than the sulfuric acid leaching, but collection of ammonia and enrichment of …

Leaching of copper and zinc from the tailings sample obtained …

This research was aimed to investigate the leaching behavior of zinc and copper from a porcelain stone tailings sample using RSM-CCD modeling. The synergetic and individual effects of five main factors including liquid/solid ratio, sulfuric acid concentration, agitation speed, leaching time, and temperature were examined on the recoveries of zinc and copper. For this …

leaching of copper from tailings using ammonia ammonium …

Apr 01, 2013· The experiments of agitation leaching were carried out in aqueous ammonia/ammonium carbonate solution, to recover copper from the flotation tailings of waste copper oxide residue. The main copper minerals contained in the flotation tailings are chrysocolla, malachite, and cuprite, with the copper grade of 1.12%.

Dissolution Potential of a Nigerian Complex Covellite Ore by …

1990). Many workers have examined copper ores purification for possible industrial utilization by hydrometallurgical method in different media with limited data on covellite ore treatments. In the dissolu-tion and kinetic studies of copper ore using different reagents such as hydrochloric acid, sulphuric acid, ammonia, ammonium chloride and ...

Ammonia Leaching: A New Approach of Copper Industry …

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 more traditional elements of copper, nickel and cobalt to the extractive metallurgy of zinc, cadmium, silver and gold [ 1 ].

Use of Ammonia Salts in Selective Copper Extraction from …

It is seen that the best copper extraction value was obtained at a leaching temperature of 30 °C, with 20% ammonium hydroxide addition and a leaching time of 2 h (approximately 65% Cu and 0% Fe). As the pH of the leaching solution in these conditions was 10–11, it was an expected situation that iron did not enter the solution.

Extraction of Zinc from Smithsonite by Ammonia Leaching

minutes, 1 hour, 3 hours, 6 hours and 12 hours. In consequence of the leaching experiments, the highest extraction rate was obtained as 76.66% using 7M NH 3 solution with 12 hours of treatment. Keywords: Smithsonite, ammonia, leaching 1. Introduction Lead and zinc are two of the most widely used commodities and have a big importance for industry.

Leaching kinetics of a Nigerian complex covellite ore by the ammonia …

The leaching kinetics of Nigerian complex covellite ore was investigated in ammonia-ammonium sulfate solution. The concentration of ammonia and ammonium sulfate, the ore particle size, and the temperature were chosen as parameters in the experiments. The results show that temperature, concentration of ammonia-ammonium sulfate has favorable ...

Leaching of copper from tailings using ammonia/ammonium …

The leaching of copper from the tailings of Baifang Copper Mine in Hunan province in China by aqueous ammonia/ammonium chloride solutions has been studied. The tailings belong to a low-grade and high-alkaline copper ore. The effect of leaching time, the concentration of ammonia, solid/liquid ratio and temperature were investigated.

Recovery of copper from copper-containing sulfide ores - Justia

10. A process for recovering copper from copper sulfide minerals, the method comprising the steps of: leaching copper sulfide minerals with an aqueous solution of ammonium chloride containing cupric chloride at a temperature of between about 75° C. and about 85° C. and a pH of between about 4 and about 7, at atmospheric pressure, to produce a …

Physical pre-concentration and ammonium leaching of metal copper …

Deep recovery of copper: leaching with ammonium salt system. For recovery of copper in the copper concentrate, copper concentrate with different size was used as raw material of leaching, using environmentally friendly ammonium salt leaching system. 3 mol/L ammonia solution and 2 mol/L ammonium chloride solution were used as the leaching …

How to Process Copper Ore: Beneficiation Methods and Equipment

The solution of ammonia and ammonium carbonate in a concentration of 12.5% was used as the solvent to leach for 2.5h at a temperature of 150℃, a pressure of 1925175~2026500Pa. The mother liquor can be distilled by steam at 90℃ to separate ammonia and carbon dioxide.