scholarly journals Mineralogical Characteristics of a Micro-Fine and Low Grade Refractory Gold Ore

2018 ◽  
Vol 142 ◽  
pp. 02011
Author(s):  
Yong Chen ◽  
Yongsheng Song ◽  
Wenjuan Li ◽  
Liulu Cai
Keyword(s):  
Analytical Techniques ◽  
Size Analysis ◽  
Gangue Mineral ◽  
Low Grade ◽  
Mineralogical Characterization ◽  
Valuable Metal ◽  
Gold Ore ◽  
Mineralogical Characteristics ◽  
Refractory Gold

Detailed characterization of a micro-fine, low-grade refractory gold ore from a beneficiation plant in Yunnan Province, China, was investigated. Different analytical techniques, such as videlicet size analysis, scanning electron microscopy, and mineral analysis by a Mineral Liberation Analyser, were used for mineralogical characterization of the ore. The results show that the most valuable metal is gold. Grain size of pyrites and arsenian pyrites, which are main gold carrying minerals, are mostly 1 ~ 30 μ m. The gangue mineral is composed of quartz, mica, dolomite and feldspar, while the content of easy-to-float and clay gangue minerals is up to 33%.

scholarly journals Mineralogical Characteristics of a Micro-Fine and Low Grade Refractory Gold Ore

2018 ◽  
Vol 142 ◽  
pp. 02011
Author(s):  
Yong Chen ◽  
Yongsheng Song ◽  
Wenjuan Li ◽  
Liulu Cai
Keyword(s):  
Low Grade ◽  
Gold Ore ◽  
Mineralogical Characteristics ◽  
Refractory Gold

Bentonite Clays Characterization in the Town of Sossego – Paraiba State

2015 ◽  
Vol 820 ◽  
pp. 65-70
Author(s):  
I.D.S. Pereira ◽  
V.N.F. Lisboa ◽  
I.A. Silva ◽  
J.M.R. Figueirêdo ◽  
G.A. Neves ◽  
...  
Keyword(s):  
Industrial Applications ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Drilling Fluids ◽  
X Ray Diffraction ◽  
Mineralogical Characterization ◽  
Bentonite Clays ◽  
The Town ◽  
Petroleum Drilling

Bentonite exhibt a range of industrial applications moving millions of dollars on the market per year. Among several applications if highlights it is use for petroleum drilling fluids. Thus, this work aims to characterize physical, mineralogical and technologically, the bentonitics clays of Sossego County, Paraíba, Brazil. Mineralogical characterization of clays was done through the following techniques: particle size analysis by laser diffraction, thermogravimetric and differential thermal analysis, chemical analysis and x-ray diffraction. The clays were turned in by treatment with sodium in Na2CO3 and then determined whether the apparent viscosity, plastic and volume of filtrate of clay-water dispersions. The results showed that the samples are of polycationic, showing levels of MgO, CaO and K2O, similar to those from Boa Vista County, Paraíba, Brazil, and consist of clay mineral kaolinite, quartz and esmec. The clays showed rheological properties that indicate potential for use in drilling fluids.

scholarly journals Characterization of Fine Fractions from the Processing of Municipal Solid Waste Incinerator Bottom Ashes for the Potential Recovery of Valuable Metals

Minerals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 838
Author(s):  
Sebastian Keber ◽  
Thomas Schirmer ◽  
Tobias Elwert ◽  
Daniel Goldmann
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Bottom Ash ◽  
Low Grade ◽  
Waste Incinerator ◽  
Municipal Solid Waste Incinerator ◽  
Mineralogical Characterization ◽  
Valuable Metals ◽  
Solid Waste Incinerator

Municipal waste incinerator bottom ashes contain copper contents comparable to those of low-grade ores in addition to other valuable metals. While the processing of coarse fractions (>2 mm) is state of the art, the fines with their residual metal content are landfilled. This paper presents the results from a mineralogical characterization of fine fractions from the processing of municipal solid waste incinerator bottom ashes. From the results, possible approaches for a recovery of copper from the fine fraction are derived. Spatially resolved phase analysis reveals that the material contains a very heterogenic mixture of naturally occurring compounds as well as particles of alloys, metals, artificial oxides, and sulfides. The most interesting element to recover is copper. Copper can be found in the form of alloys, simple sulfides (XS), and oxides (XO). During the incineration process, new phases are generated that differ from natural ones and therefore can be called artificial minerals. Additionally, several components are partially altered due to oxidation, especially after the prolonged outside storage of the bottom ash. Crystalline silicate and glass particles are only sporadically enriched in Cu. Based on these results, different processing techniques are discussed. Due to the small particle size distribution and the physical and physico-chemical properties of the particles, flotation seems to be the most promising technique for the enrichment of copper from municipal solid waste incineration bottom ash (MSWI-BA) fine fractions.

Extraction of Gold from a Low-Grade Double Refractory Gold Ore Using Flotation-Preoxidation-Leaching Process

2015 ◽  
pp. 55-62
Author(s):  
Yongbin Yang ◽  
Shiqian Liu ◽  
Bin Xu ◽  
Qian Li ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Low Grade ◽  
Gold Ore ◽  
Leaching Process ◽  
Refractory Gold

Characterization of Carlin-Type Gold Ore by Photoacoustic, Raman, and EPR Spectroscopy

1982 ◽  
Vol 36 (5) ◽  
pp. 574-576 ◽  
Author(s):  
John H. Nelson ◽  
J. Jeffrey Macdougall ◽  
Frank G. Baglin ◽  
Dean W. Freeman ◽  
Mel Nadler ◽  
...  
Keyword(s):  
Humic Acid ◽  
Vibrational Spectroscopy ◽  
Epr Spectroscopy ◽  
Elemental Carbon ◽  
Low Grade ◽  
Spectroscopic Techniques ◽  
Gold Ore

Low-grade carbonaceous gold ore (0.01 to 1.8 oz/ton of gold) from the Carlin mine in Elko county, Nevada, has been characterized by a variety of analytical and spectroscopic techniques with emphasis on vibrational spectroscopy. A particular concern was determining the nature of the carbon-containing material in the ore. It was found that in addition to the anticipated carbonate, finely disseminated elemental carbon is present in amounts ranging from 0.062 to 0.43 wt. %. Contrary to previous reports, no detectable amounts of humic acid materials or organic hydrocarbons are present in any of the samples investigated.

scholarly journals Improved recovery of a low-grade refractory gold ore using flotation–preoxidation–cyanidation methods

2014 ◽  
Vol 24 (4) ◽  
pp. 537-542 ◽  
Author(s):  
Soltani Faraz ◽  
Darabi Hossna ◽  
Badri Rezgar ◽  
Zamankhan Piroz
Keyword(s):  
Low Grade ◽  
Gold Ore ◽  
Refractory Gold

Physicochemical and Slow-Release Antibacterial Properties of Clove Oil/β-Cyclodextrin Inclusion Complex

2013 ◽  
Vol 668 ◽  
pp. 183-187
Author(s):  
Xi Hai Hao ◽  
Ping Jiang
Keyword(s):  
Inclusion Complex ◽  
Antibacterial Properties ◽  
Stability Limit ◽  
Analytical Techniques ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
Clove Oil ◽  
Cyclodextrin Inclusion ◽  
Physicochemical Stability

Clove oil is a natural antiseptic and analgaesic, however, its volatility strong odour, insolubility in water, and low physicochemical stability limit its application as food functional ingredients. The aim of this study was to investigate the physicochemical and release characterization of inclusion complexes of Clove oil in β-Cyclodextrin (β-CD). The formation of Clove oil /β-CD inclusion complex was demonstrated by different analytical techniques including Particle size analysis, TG analysis and SEM. The release rate of Clove oil from the inclusion complex was controlled.

Extraction of Gold from a Low-Grade Double Refractory Gold Ore Using Flotation-Preoxidation-Leaching Process

2015 ◽  
pp. 53-62 ◽  
Author(s):  
Yongbin Yang ◽  
Shiqian Liu ◽  
Bin Xu ◽  
Qian Li ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Low Grade ◽  
Gold Ore ◽  
Leaching Process ◽  
Refractory Gold
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