Research on Chloride Leaching of Cu, Zn and Ag from Flotation Tailings

2011 ◽  
Vol 391-392 ◽  
pp. 1138-1142 ◽  
Author(s):  
Dian Kun Lu ◽  
Li Fang Shi ◽  
Zhe Nan Jin
Keyword(s):  
Leaching Test ◽  
Nacl Solution ◽  
Optimum Conditions ◽  
Flotation Tailings ◽  
Sulphide Minerals ◽  
Chemical Phase ◽  
Valuable Metals ◽  
Chloride Leaching ◽  
Mineral Compositions ◽  
Chemical Phase Analysis

Mineralogical examinations of Asheler copper mine flotation tailings have been carried out. Results show that the major metal sulphide minerals are pyrite and the main gangue constituents are quartz, chlorite-serpentine and muscovite. The main valuable metals are Cu, Zn and Ag. Basic mineral compositions of copper and zinc have been identified through chemical phase analysis. On the basis of mineralogical examinations, leaching test has been carried out in about 240g/l NaCl solution. The optimum conditions for leaching are found as follows: temperature at 86°C, pulp concentration is 24.19%wt, [Cu2+] =19.22g/l, [HCl] initial =0.17mol/L. Under these conditions, chloride leaching can extract 83.35%Cu, 92.10%Zn, and 85.26%Ag after 8 hours leaching.

scholarly journals Recovery of Valuable Metals from Nickel Smelting Slag Based on Reduction and Sulfurization Modification

Minerals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1022
Author(s):  
Wei Sun ◽  
Xiong Li ◽  
Runqing Liu ◽  
Qilin Zhai ◽  
Jie Li
Keyword(s):  
Environmental Pollution ◽  
Chemical Phase ◽  
Valuable Metals ◽  
Smelting Slag ◽  
Chemical Phase Analysis ◽  
Complex Forms ◽  
Slag Modification ◽  
Nickel Smelting ◽  
High Yields ◽  
Free Metal

Nickel smelting slag contains valuable metals including nickel and copper. Failure to recycle these metals wastes resources, and disposal of nickel slag in stockpiles results in environmental pollution. Nickel slag recycling is important, and metals can be recovered from slag by flotation. However, considering the complex forms in which valuable metals occur in nickel slag, high yields are difficult to achieve by direct flotation. In this study, nickel slag was modified by reduction and sulfurization to render it more amenable to metal recovery through flotation. The mechanism was assessed based on thermodynamics and elements’ phase distributions. Thermodynamic analyses indicated the feasibility of nickel slag modification by reduction–sulfurization smelting. The results of chemical phase analysis show that the forms in which valuable metals occur in nickel slag can be modified by reduction–sulfurization, and the proportion of metals existing in sulfide and free metal states in nickel slag can be increased. Compared with the direct flotation of raw slag, the recovery of nickel and copper from top-blowing slag increased by 23.03% and 14.63%, respectively. The recoveries of nickel and copper from settling slag increased by 49.68% and 43.65%, respectively.

scholarly journals Gold recovery from flotation concentrate from gold mine tailings using dissolve smelting

2019 ◽  
Vol 55 (3) ◽  
pp. 343-349
Author(s):  
U. Erdenebold ◽  
C.-M. Sung ◽  
J.-P. Wang
Keyword(s):  
Molten Slag ◽  
Precious Metals ◽  
Copper Slag ◽  
Molten Copper ◽  
Flotation Concentrate ◽  
Sulphide Minerals ◽  
Oxidative Roasting ◽  
Valuable Metals ◽  
Gold Mine Tailings ◽  
High Concentrations

Gold flotation concentrate may contain relatively high concentrations of valuable metals such as iron, copper, and zinc, and occasionally, even precious metals such as gold. The major components of the concentrate are SiO2, Fe2O3, and Al2O3, but it also contains reactive sulphide minerals such as pyrite. The sulphides in the flotation concentrate are fully converted into an oxide form during oxidative roasting, therefore, the chemical composition of the roasted concentrate is considered to be a copper slag. High temperature smelting with additives to dissolve Au from the gold concentrate into a molten copper was used in the research. Gold greatly dissolved at 1600?? under a CaO/SiO2 ratio of 1.25, suggesting the increase in the dissolution of gold into molten copper with decreasing viscosity of the molten slag-like concentrate at high temperatures.

Silver leaching and recovery of valuable metals from magnetic tailings using chloride leaching

2018 ◽  
Vol 181 ◽  
pp. 408-415 ◽  
Author(s):  
Chang Lei ◽  
Bo Yan ◽  
Tao Chen ◽  
Xiao-Liang Wang ◽  
Xian-Ming Xiao
Keyword(s):  
Valuable Metals ◽  
Chloride Leaching

scholarly journals Synthesis and Characterization of CaxSryBa1-x-yFe12-zLazO19 by Standard Ceramic Method

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Rohit K. Mahadule ◽  
Purushottam R. Arjunwadkar ◽  
Megha P. Mahabole
Keyword(s):  
Dielectric Constant ◽  
Ac Conductivity ◽  
Phenomenological Theory ◽  
Dielectric Polarization ◽  
Ceramic Method ◽  
Chemical Phase ◽  
Ferrite Structure ◽  
Magnetic Dilution ◽  
Chemical Phase Analysis

The polycrystalline compounds with chemical formula CaxSryBa1-x-yFe12-zLazO19 (CSBFLO) were synthesized via standard ceramic method. The chemical phase analysis was carried out by X-ray powder diffraction (XRD) method, which confirmed the formation of the magnetoplumbite phase belonging to ferrite structure. The frequency dependence of AC conductivity and dielectric constant was studied in the frequency range of 10 Hz to 2 MHz. The experimental results revealed that AC conductivity increases with increasing frequency, which is in agreement with Koop’s phenomenological theory. However, variation in dielectric constant required explanation in light of dielectric polarization. Magnetic characterization included studies of parameters such as Ms, Mr, Hc, and Tc, and results were explained via magnetic dilution and canting spin structure.

A two-step approach for copper and nickel extracting and recovering by emulsion liquid membrane

2016 ◽  
Vol 74 (10) ◽  
pp. 2454-2461
Author(s):  
Qiang Bi ◽  
Juanqin Xue ◽  
Yingjuan Guo ◽  
Guoping Li ◽  
Haibin Cui
Keyword(s):  
Liquid Membrane ◽  
Volume Fraction ◽  
Process Variable ◽  
Phase Volume ◽  
Optimum Conditions ◽  
Application Technology ◽  
Emulsion Liquid Membrane ◽  
Phase Volume Fraction ◽  
Internal Phase ◽  
Valuable Metals

The recycling of copper and nickel from metallurgical wastewater using emulsion liquid membrane (ELM) was studied. P507 (2-ethylhexyl phosphonic acid-2-ethylhexyl ester) and TBP (tributyl phosphate) were used as carriers for the extraction of copper and nickel by ELMs, respectively. The influence of four emulsion composition variables, namely, the internal phase volume fraction (ϕ), surfactant concentration (Wsurf), internal phase stripping acid concentration (Cio) and the carrier concentration (Cc), and the process variable treat ratio on the extraction efficiencies of copper or nickel were studied. Under the optimum conditions, 98% copper and nickel were recycled by using ELM. The results indicated that ELM extraction is a promising industrial application technology to retrieve valuable metals in low concentration metallurgical wastewater.

Chemical phase analysis of zircon refractories

Refractories ◽  
1969 ◽  
Vol 10 (3-4) ◽  
pp. 182-186
Author(s):  
L. V. Bogova
Keyword(s):  
Phase Analysis ◽  
Chemical Phase ◽  
Chemical Phase Analysis

Studying on Leaching Zinc Oxide Ore in the System of H2SO4

2013 ◽  
Vol 785-786 ◽  
pp. 1087-1090
Author(s):  
Ying Bo Mao ◽  
Zhi Cong Wei ◽  
Jian Jun Fang ◽  
Shan Wang ◽  
Tie Min Zhang
Keyword(s):  
Zinc Oxide ◽  
Sulfuric Acid ◽  
Yunnan Province ◽  
Leaching Test ◽  
Leaching Rate ◽  
Optimum Conditions ◽  
Liquid Ratio

Leaching test on the Oxidized Zinc Ore coming from Yunnan Province is studied in the H2SO4 system;Systematic studies are made to show the effects of various factors on the leaching rate of zinc. The optimum conditions for leaching is finally confirmed, namely the grinding size is 75% of-0.074mm, concentration of sulfuric acid 15%, temperature 60°C, solid to liquid ratio 3:1, and leaching time 2.5h. Ultimately, the leaching rate of Zn could reach more than 59%.

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