Ammonia Leaching: A New Approach of Copper …
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 ...
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. …
Investigation of Leaching Conditions and Leaching Kinetics …
— In this study, the dissolution conditions and dissolution kinetics of copper from malachite in the presence of organic acid (C4H6O6) as an organic leaching reagent were examined. The effects of particle size, acid concentration, time, solid/liquid ratio, temperature, and mixing speed on the dissolution process of copper were investigated. …
Ammonia Leaching: A New Approach of Copper Industry …
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. Under these …
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 …
Acidic and Ammonium Sulphate Leaching of Historic Copper Tailings …
— Only Cu extraction yields at 90 min using ammonia leaching were slightly comparable to H 2 SO 4 leaching at pH 3. All the other recoveries using ammonia solution were lower than those obtained using both acids. Manganese recoveries were lower than Cu, as ammonia solution is more selective towards Cu than Mn .
Ammonia Leaching: A New Approach of Copper …
— Copper leaching from ore using ammonia should be followed by selective extraction of copper using the extraction agent in the solvent extraction process. LIX63 was the first extraction agent used in …
Leaching kinetics of copper flotation tailings in aqueous ammonia …
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%. Effects of lixiviant concentration, …
Selective leaching of a copper ore by an …
The initial content of copper in the tailings was 1109 mg Cu/kg of dry tailing, where close to 40% of the sample in weight corresponded to a soluble fraction. ... the technique envisaged consists in the copper dissolution by …
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 …
Leaching kinetics of copper flotation tailings in aqueous ammonia …
— 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%.
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 …
AMMONIA LEACHING IN THE COPPER INDUSTRY: A …
— ammonia/ (ammonium chloride leaching time, the concentration of ammonia, solid/liquid ratio and temperature 75 Guo-dong and Qing, 2010) Dissolution kinetics of low grade complex copper ore in ...
[PDF] Leaching kinetics of low-grade copper ore containing …
— Semantic Scholar extracted view of "Leaching kinetics of low-grade copper ore containing calcium-magnesium carbonate in ammonia-ammonium sulfate solution with persulfate" by Zhi-xiong Liu et al. ... Dissolution kinetics of low grade complex copper ore in ammonia-ammonium chloride solution. W. Liu M. Tang Chao-bo Tang Jing He Shenghai …
The aqueous chemistry of the copper-ammonia system and …
— In the ammonium chloride system (Fig. 10 a and b), at 1M NH 4 Cl with the addition of chloride into solution, the experimental copper solubility was slightly shifted compared to without chloride and subsequently reduced the solubility of Cu 2+ at pH 9 compared to without chloride addition.
Ammonia leaching in the copper industry: a …
— The current study investigated a hybrid approach using aqueous ammonia as a pH modifier for glycine-based lixiviant systems to leach copper from chalcopyrite while maintaining surface...
Use of Ammonia Salts in Selective Copper Extraction from …
— This study investigated the usage conditions of five different ammonia salts as leaching reactants for the purpose of selective extraction of copper from tailings.
Dissolution kinetics of malachite in ammonia/ammonium carbonate leaching
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 … Expand
Novel treatment for mixed copper ores: Leaching ammonia …
— Fig. 1 shows that the most critical variable was the solid concentration in the leaching solution, wherein the copper extraction rate increased by 23% (for similar pH values and NH 3 level). This coincides with several investigations, which showed that the lower the S/L ratio, the higher the kinetics of copper dissolution. The more significant …
AMMONIA LEACHING IN THE COPPER INDUSTRY: A …
— ammonia/ammonium chloride solution and its dynamics ammonia/ (ammonium chloride leaching time, the concentration of ammonia, solid/liquid ratio and temperature 75 Guo-dong and Qing, 2010 ...
Ammonia Leaching of Tailings from A Copper Mine
In order to comprehensively recover copper from a copper mine, the process of copper recovery from tailings by ammonia leaching is investigated. The results show that the optimal condition is 1∶1.6 quality ratio of tailings and 25%～28% ammonia solution, 30℃ leaching temperature, 16d leaching period, 0.22mol/L assistant addition. The results can …
Copper recycle from sulfide tailings using combined leaching of ammonia
— 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: •
Copper recycle from sulfide tailings using combined leaching of ammonia
For instance, the possibile evaluation of copper bioleaching from flotation tailings on a benchscale, commissioning and industrial tests (Kondrat'eva et al., 2012; Yin et al., 2017), electro-dialytic remediation of copper mine tailings in 2005 (Hansen et al., 2005), acid leaching of copper and zinc from flotation tailings using a H2SO4 solution ...
Bioleaching of two different chalcopyrite ores in chloride …
— Chalcopyrite is the most abundant copper mineral and its bioleaching has been the subject of several studies due to its refractory nature when submitted to hydrometallurgical processes. Moreover, the growing worldwide demand for copper requires the processing of low-grade ores or mining tailings for which hydrometallurgical …
Leaching kinetics of low-grade copper ore containing …
— LIU et al [12] investigated the dissolution kinetics of low-grade copper ore in ammonia-ammonium chloride solution. The results indicate that the malachite is dissolved easily and chrysocolla is extracted difficultly in ammoniacal solution and bornite is not dissolved in ammonia leaching without oxidants. ... Ammonia leaching for tailings from ...
Dissolution kinetics of low grade complex copper ore in ammonia …
— DOI: 10.1016/S1003-6326(09)60235-1 Corpus ID: 55527376; Dissolution kinetics of low grade complex copper ore in ammonia-ammonium chloride solution @article{Liu2010DissolutionKO, title={Dissolution kinetics of low grade complex copper ore in ammonia-ammonium chloride solution}, author={W. Liu and Mo-tang Tang and Chao …
Leaching kinetics of copper flotation tailings in aqueous ammonia …
— 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.
Separation and Recovery of Copper from Ammonia Pregnant Leach Solution …
— The recent revolution of technology makes copper find a wide array of applications in electrical, construction, machinery, and defense industries, among others due to its excellent properties of ductility, malleability, and corrosion resistance, among others. However, with the rise in the development of electrical and electronic products, a …
Leaching of copper from tailings using ammonia/ammonium chloride
DOI: 10.1109/ICCCENG.2010.5560449 Corpus ID: 29359400; Leaching of copper from tailings using ammonia/ammonium chloride solution and its dynamics @article{Zhao2010LeachingOC, title={Leaching of copper from tailings using ammonia/ammonium chloride solution and its dynamics}, author={Guo-dong Zhao and …
Renewable ammonium chloride-induced calcium leaching of gold and copper
— This study introduced a high-value green processing solution for copper tailings to prepare high-purity vaterite from gold-copper tailings. ... research has identified the use of ammonium chloride-ammonia leaching system in wet metallurgical processes. It dissolves zinc by forming zinc-ammonia complexes (Ding et al., 2010) and leaves …
Copper Leaching | PDF | Ammonia | Chemical …
Copper Leaching - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document reviews ammonia leaching in the copper industry. It provides a brief history of ammonia leaching, including some …
Use of Ammonia Salts in Selective Copper Extraction …
that copper could be selectively recovered from tailings. Keywords Copper .Extraction .Tailings .Leaching .Ammoniasalts 1 Introduction Copper production methods vary based on the characteristics of the ore that is used as the raw material. In general, pyro-metallurgical methods are used for sulfur-containing copper
Leaching kinetics of low-grade copper ore with high-alkality …
— The leaching kinetics of low-grade copper ore with high-alkality gangues was studied in ammonia-ammonium sulphate solution. The main parameters, such as ammonia and ammonium sulphate concentrations, particle size, solid-to-liquid ratio and reaction temperature, were chosen in the experiments. The results show that the increase of …
Ammonia Leaching of Tailings from A Copper Mine
In order to comprehensively recover copper from a copper mine, the process of copper recovery from tailings by ammonia leaching is investigated. The results show that the …