(PDF) Sulfide Mineral Oxidation - ResearchGate
Sulfide Ni-Cu ores occur typically in mafic and ultramafic igneous rocks. Setpentine minerals are also common. As a consequence of metamorphosis, sulfides and secondary minerals may be finely ...
اقرأ أكثر
FROTH FLOTATION : RECENT TRENDS Flotation of Sulphide …
recover fine grained sulphide minerals from complex ore deposits, whose processing was earlier considered un-economical. Today, about 400 million tons of sulphide ore is treated annually by flotation process worldwide. General principles and factors effecting flotation process, control systems, innovations and new trends are reviewed in the paper.
اقرأ أكثر
Mineralogy, Textures, and Relative Age Relationships of ...
the West Shasta ore are compared with those of Ku- roko- and Besshi-type massive sulfide deposits, and the bearing of these characteristics on depositional processes is examined. Finally, recent K-Ar dating of the West Shasta ore by Kistler et al. (1985) is exam- ined in light of the relative age relationships outlined here.
اقرأ أكثر
What is Sulfide Mining? | Mining Action Group
Metallic sulfide mining (aka hard rock mining) is the practice of extracting metals such as nickel, gold and copper from a sulfide-rich ore body. Sulfides are a geologic byproduct of mining in this area, and by exposing sulfides to the air and water in our atmosphere, sulfuric acid can be created — threatening to poison the nearby water ...
اقرأ أكثر
Which of the following statements, about the advantage of ...
A. Roasting of the sulphide to the oxide is thermodynamics feasible B. Carbon and hydrogen are suitable reducing agents for metal sulphides C. The `delta(fG)^(o0)` of the sulphide is greater than those for `CS_2` and `H_(2)S` D. The `delta(fG)^(o)` is negative for roasting of sulphide ore to oxide.
اقرأ أكثر
Minerals | Free Full-Text | Effects of Pyrite Texture on ...
Unlike Ore A, the sulfide minerals in Ore B were in the form of fine grains and showed complex liberation characteristics. It was seen that in every size fraction, the grain size distribution was finer in Ore B, particularly for pyrite . The liberation value of chalcopyrite in Ore B was only ~15%, and the chalcopyrite particles were mostly in ...
اقرأ أكثر
(PDF) Flotation of an Oxidized Copper Sulfide Ore
The copper-iron ore has grades of 0.58% Cu and 42.14% Fe in Anhui. According to test on raw ore, it has the characteristics of close intergrowth and fine dissemination size, which belongs to a ...
اقرأ أكثر
Shock waves in air suspensions of sulfide ores | SpringerLink
A thermogravimetric study of oxidation of sulfide ore powders subjected to slow quasi-steady heating from 20 to 1000 °C is performed. Experiments on rapid shock wave and explosive heating of air suspensions of ore powders are carried out for modeling conditions of ore extraction in mines. Propagation of incident and reflected shock waves in air suspensions of fine-grained sulfide ores …
اقرأ أكثر
Marble-hosted sulfide ores in the Angouran Zn-(Pb-Ag ...
The fine-grained sulfide ore is massive, replacive, often brecciated, clearly postmetamorphic and dominated by Fe-poor sphalerite, with minor galena, pyrite, anhydrite, quartz, muscovite, dolomite, and rare calcite. Sphalerite contains Na-Ca-Cl brine inclusions (23-25 mass% total dissolved solids) with homogenization temperatures of 180-70°C.
اقرأ أكثر
List Sulphide Minerals - Mineral Processing & Metallurgy
— Color, pure lead-gray: very fine-grained galena, (steel galena) is sometimes quite dark; powder, same as ore; may be weathered to white or gray; luster, metallic; H = 2.5 to 2.75; G = 7.4 to 7,6. Contains 86.6% lead, more or less silver, up to 1% or more, sometimes as a part of the galena, but sometimes as another mineral (as argentite ...
اقرأ أكثر
A sulphide gold ore from the Eastern Goldfields of | Chegg.com
2 A sulphide gold ore from the Eastern Goldfields of Western Australia is hosted in altered greenstones, and has a sulphide fraction consisting of pyrite and arsenopyrite. Head grade is 6 g/t. Mining is proceeding via a deep open pit and is now in hypogene ore, well below the supergene zone.
اقرأ أكثر
The Eagle and East Eagle sulfide ore‐bearing mafic ...
[11] The silicate portion of semimassive sulfide ores is composed of medium-grained (3–5 mm diameter) olivine and smaller (<2.5 mm diameter) pyroxene and plagioclase. It contains 85%–90% olivine, 5%–10% clinopyroxene, 1%–2% orthopyroxene and 1%–2% plagioclase.
اقرأ أكثر
FROTH FLOTATION : RECENT TRENDS Flotation of …
recover fine grained sulphide minerals from complex ore deposits, whose processing was earlier considered un-economical. Today, about 400 million tons of sulphide ore is treated annually by flotation process worldwide. General principles and factors effecting flotation process, control systems, innovations and new trends are reviewed in the paper.
اقرأ أكثر
Sulphide Gold Ore Treatment by Leaching and Flotation Process
Problem with gold recovery from sulphide ore: How may a mill get the maximum recovery of gold from a sulphide ore, at the least capital cost and at the same time obtain the highest net return.This latter point is most important. In many cases a gold mill using an all-cyanide flowsheet with fine grinding of all the ore will report very low gold content in the tailings particularly on an ...
اقرأ أكثر
Contrasting Geochemistry of Apatite from Peridotites and ...
In comparison, the massive and disseminated sulfide ores contain fine-grained apatite (<200 μm) that is associated with sulfide minerals, phlogopite, and albite.
اقرأ أكثر
Mining Industry | Copper Sulfide Ore and Flotation Process ...
1 Types of copper sulfide ore (1) Single copper mineral Its ore characteristic is relatively simple, and the only useful component that can be recycled is copper. The gangue minerals are mainly quartz, carbonate and silicate. (2) Copper-sulfur ore Called copper-bearing pyrite. In addition to copper minerals, iron sulfide can be recovered, and the main mineral of sulfur is pyrite.
اقرأ أكثر
VOLCANIC-ASSOCIATED MASSIVE SULFIDE DEPOSITS …
Grain size is highly variable and is generally controlled by primary sulfide mineralogy and the extent of metamorphic recrystallization. Primary sulfide minerals of most zinc-lead-copper deposits are fine grained and intergrown, whereas those of most copper-zinc deposits are coarser grained (Franklin, 1993). The extent of grain size changes
اقرأ أكثر
Establishing thE ProcEss MinEralogy of gold orEs
6 Iron sulfide ores Gold occurs as liberated particles, attachments to and inclusions in sulfide (commonly in pyrite, and ... and arsenopyrite is: fine-grained>porous>coarse-grained (Figures 8 & 9). In some gold deposits, zoned pyrite contains a high gold concentration, and gold in the outer ...
اقرأ أكثر
mineral - Sulfides | Britannica
mineral - mineral - Sulfides: This important class includes most of the ore minerals. The similar but rarer sulfarsenides are grouped here as well. Sulfide minerals consist of one or more metals combined with sulfur; sulfarsenides contain arsenic replacing some of the sulfur. Sulfides are generally opaque and exhibit distinguishing colours and streaks. (Streak is the colour of a mineral's ...
اقرأ أكثر
SIGNIFICANCE OF EXPOSED GRAIN SURFACE AREA IN …
traditional mechanical flotation cell. The data indicate that exposed grain surface area is a critical factor for coarse particle flotation. For the gold-bearing sulfide ore examined in this study, the HRXMT data suggest that near complete recoveries of coarse (850x500 m) multiphase particles containing as little as 1%
اقرأ أكثر
1 Froth Flotation – Fundamental Principles
1 1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a
اقرأ أكثر
Sulfide Mining and Human Health - Save the Boundary …
grained materials left over after the metals of interest are extracted) are exposed to moisture and atmospheric oxygen. When the sulfide mineral ore and wastes come into contact with air and water, chemical reactions occur that result in seepage of sulfuric acid, sulfate and toxic metals into ...
اقرأ أكثر
Flotation and tailing discarding of copper cobalt sulfide ...
The mineral composition of copper–cobalt ores is more complex than that of copper sul-fides, and it is also difficult to discard tailing efficiently in primary flotation for the fine-grained disseminated of ore. In this work, a mineral liberation analyzer (MLA) was employed to study the characteristics of minerals.
اقرأ أكثر
Deportment of Gold in Sulfide Ores and Implications for ...
Gold in sulfide ores is associated predominantly with sulfide minerals and occurs as both microscopic and submicroscopic particles. In non-refractory sulfide ores, gold occurs mainly as coarse- and medium-grained particles. Minute inclusions and submicroscopic gold usually account for a minor portion.
اقرأ أكثر
Mineralogical Society of America - Sulfide Mineralogy and ...
Volume 61: Sulfide Mineralogy and Geochemistry David J. Vaughan, editor 2006 i-xiii + 714 pages. ISBN 0-93; ISBN13 978-0-93. The importance of sulfide minerals in ores has long been, and continues to be, a major reason for the interest of mineralogists and geochemists in …
اقرأ أكثر
Sulfide ore facies, fluid inclusion and sulfur isotope ...
Sulfide mineralization textures are massive, replacement, vein-veinlet, laminated, disseminated, and breccia Three mineralization stages are distinguished: early, main and post-ore. An early fine-grained sulfide ore (early ore, stage I) occurs in the bedded facies which has synsedimentary textures such as laminated, disseminated and framboidal ...
اقرأ أكثر
Magmatic Ore Deposits - unal.edu.co
Where the immiscible melt material consis ts of massive chromite or sulfide ore which will probably migrate downward with gravity, due to the abnormally high specific gravity. The famous nickel, platinum and sulfide ores of Sudbury, Ontario are prime ... which are typically much finer grained than the minerals of yellow ores. The circulation of ...
اقرأ أكثر
8 Types of Gold Ore- Properties and Ways to Process | Fote ...
4. Gold sulfide ore Properties of gold sulfide ore Gold sulfide ore is the inorganic compound with the formula Au2S. It is the principal sulfide of gold and decomposes to gold metal and elemental sulfur, illustrating the "nobility" of gold. In nature, the covalent radii of gold sulfide and silver are similar, and the two will form a solid solution.
اقرأ أكثر
Flotation and Tailing Discarding of Copper Cobalt Sulfide ...
The mineral composition of copper–cobalt ores is more complex than that of copper sulfides, and it is also difficult to discard tailing efficiently in primary flotation for the fine-grained disseminated of ore. In this work, a mineral liberation analyzer (MLA) was employed to study the characteristics of minerals. As a significant mineralogical characteristic, the liberation degree of useful ...
اقرأ أكثر
(PDF) BARNES 2018- Sulfide silicate textures in magmatic ...
The process of percolation of dense, low-viscosity sulfide liquid into pore space and fractures within partially molten (or melting) silicate rock is a unifying theme that links sulfide matrix ore breccias and emulsion textured ores with distinctive textures in less sulfide rich rocks such as net-texture (matrix ore texture), leopard texture ...
اقرأ أكثر
12. Supergene Ore and Gangue Characteristics
sulfide ore and reprecipitated at depth. This precipitation of Cu ... Textures, Structures, and Grain Size 187. are replaced by chalcocite, digenite, covellite, and other Cu-rich sulfides. Acanthite may form in the supergene zone as silver is released from tetrahedrite. As oxidizing conditions
اقرأ أكثر
Sediment hosted stratiform Barite - (Cu-Zn-Pb) deposits in ...
The recrystallized layers in the stratiform ore contain coarse-grained accumulation of sulfide and gangue minerals. Thermal annealing resulted from the regional metamorphism plays a pivotal role in the formation of this typical granoblastic texture presents in the massive and semi-massive pyritic mineralization zone.
اقرأ أكثر
Flotation Behavior of Complex Sulfide Ores in the Presence ...
Complex sulfide ore samples of Mississippi valley type were obtained from a mine located in North America. A full characterization study of mineral samples was conducted to reveal both qualitative and quantitative information about the crystalline phases within the sample as well as mineral associations, elemental distributions (assay), grain ...
اقرأ أكثر