Processing Gold from Sulfide Ores - Assaying, Microscopy, …
Processing complex sulphide ores - which are commonly refractory - is an enormous topic, which as the other respondents have indicated, is pretty difficult to address in this forum ... More commonly in a sulphide ore you would need to float the sulphide minerals, assuming the gold is associated with them, which it often is, and then oxidise it ...
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FROTH FLOTATION : RECENT TRENDS Flotation of Sulphide …
grinding media and the sulphide minerals. 7. Sulphide ore minerals are generally floated using thiol type reagent xanthates, dithio phosphates etc. Oxidised minerals do not respond to these collectors and hence require surface modifying treatment. COMPLEX SULPHIDE ORES Many of the sulphide minerals do not occurs singly. They are generally
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Sulfide Mining | Sierra Club
Metallic sulfide mining is a type of mining never before permitted in the land of 10,000 lakes. The mining of copper/nickel sulfide ores is a toxic type of mining that is risky to our environment, our workers and communities, and local …
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EXTRACTING METALS FROM SULFIDE ORES
The need for a new process to treat Broken Hill ore arose from the depletion of the secondary oxide ore that overlay the major sulfide mineralization. ... About 60% of the world 2009 nickel production of 1.4 million tonnes was derived …
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Northeast Minnesota's fraught choice: Precious metals v. precious …
In 2016, groups representing more than 30,000 Minnesota physicians asked the Minnesota Environmental Quality Board to require a public health impact assessment as part of the environmental review process for sulfide-ore mines. But …
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CLIMATE CHANGE HEALTH Sulfide-ore mining AND human …
Proponents of sulfide-ore mining argue that we need these metals in our lives and that they can be extracted safely within the state regulatory guidelines. Opponents of sulfide-ore question whether industry can extract these metals safely without irreversible harm to the surrounding ecosystem and beyond, particularly in water-rich environments.
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Sulfide Ore Mining in the Boundary Waters - ArcGIS StoryMaps
Metallic sulfide mining is the process of extracting metals such as nickel, gold, and copper from sulfide-rich ore. After extracting metal from the rock, the waste rock that is left is called sulfides. When sulfides are exposed to air and water, sulfuric acid (commonly known as battery acid) is created. Sulfuric acid leaches heavy metals ...
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Sulfide-Ore Copper Mining and/or A Sustainable …
as explained below, based on conservative assumptions, sulfide-ore copper mining in the watershed of the boundary waters could bring the following effects for the three-county arrowhead study region: $288 million in lost visitor spending each year that would otherwise support 4,490 local jobs $76 million in residents' income $31 …
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Sulfide Minerals Flotation Process - JXSC Machine
Sulfide ores, which are generally mined from underground and often found in conjunction with copper-bearing ores, contain copper–iron sulfides in association with nickel–iron sulfides. ... If need a higher grade, then need to flotation more times. Will get each mineral concentrate ore after flotation system. 4. Concentrate ore filtering system.
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Sulphide Mineral Indicators For Gold – BC Gold Adventures
The main sulfide mineral associated with tin and the biggest matrix for tin ore. It is typically found in igneous and metamorphic rock formations. The old timers knew the significance of sphalerite as a potential gold indicator and called it "blackjack" or "rosin jack.". Sphalerite comes in a range of colors, including grey or greyish ...
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Sulphide Gold Ore Treatment by Leaching and Flotation …
Sulphides require very fine grinding for maximum extraction, then are returned to circuit. Gangue carries some gold that is easily recovered at …
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Refractory Sulfide Ores—Case Studies - ScienceDirect
The low sulfide content and low ore throughput allowed a single conventional roaster to be used. A higher treatment rate for sulfide sulfur had the potential to significantly add costs through the need to use a circulating fluid bed (CFB) roaster or multiple trains.
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sulfide ore.... alot of sulfide ore | Gold Refining & Metal Extraction ...
Get an assay done on those sulfides, if it's more than just a small truck load of Ore. That is your primary objective at this point. You need to know what it contains as far as Gold/Silver before you step up to roasting and leaching. Determine values first, unless you want to dig yourself an expensive hole. I did that once.
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Ore genesis - Wikipedia
Liquid immiscibility: sulfide ores containing copper, nickel, or platinum may form from this process. As a magma changes, parts of it may separate from the main body of magma. Two liquids that will not mix are called immiscible; oil and …
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Copper Sulfide Ore and Flotation Process - JXSC Mining
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 …
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Copper Sulfide Flotation - Mineral Processing
Copper minerals usually occur in low grade deposits and require concentration prior to smelting. The method and degree of concentration depends on smelter location and schedules, together with the nature of the ore deposit. …
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Ore genesis - Wikipedia
Liquid immiscibility: sulfide ores containing copper, nickel, or platinum may form from this process. As a magma changes, parts of it may separate from the main body of magma. Two liquids that will not mix are called immiscible; oil and water are an example. ... Genesis of common ores. As they require the conjunction of specific environmental ...
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What is Sulfide Mining? | Mining Action Group - Save the Wild U.P
What is Sulfide Mining? 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 ...
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Sulfide Ore | crisonchemistry
Sulfide Ore Flotihyb DTC-X Collectors – Advancing Greater Selectivity. ... Can be used at the natural pH of most flotation systems with no need for additional caustic. Flotixans are covered under US Patent 9,481,634 and other pending …
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Processing Gold from Sulfide Ores - Assaying, …
A geologist said that the fire assay may not have extracted the gold from the ore, because of the various gold-silver-copper sulfur refractory compounds within due to a limited process that was used. This type of ore requires more extensive process steps to reduce the gold. We have tried various different methods of recovery, without success.
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EXTRACTING METALS FROM SULFIDE ORES - Electrochemical …
The need for a new process to treat Broken Hill ore arose from the depletion of the secondary oxide ore that overlay the major sulfide mineralization. ... About 60% of the world 2009 nickel production of 1.4 million tonnes was derived from sulfide ores, but an ever-increasing proportion is coming from other ores (such as laterites, in which ...
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Sulfide Ore - an overview | ScienceDirect Topics
VMS ore-forming fluids are acidic, reduced, 1–3 M chloride solutions in which metals were transported mainly as chloride complexes (Table 3).Before the discovery of black smokers, temperatures of the ore fluids were estimated from rare fluid inclusion data and sulfur isotope fractionation between sulfide mineral pairs. pH values about 1 unit less than neutral (~5 at …
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8 Types of Gold Ore- Properties and Ways to Process
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.
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Sulphide Gold Ore Treatment by Leaching and …
A Flowsheet to recovery gold from sulfide ores. There are many arrangements and combinations using flotation in conjunction with treatment of gold ores. The two gold process flowsheets shown, with some variations, are …
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Treatment of Mixed Sulfide Oxide Ores of Copper
Many of our largest copper deposits contain both sulfide and oxidized copper minerals. The large porphyry mines, with a total copper content of from 1.3 to 2.0 per cent., send to their mills ore with an oxide content of …
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Agencies Announce Critical Next Step for the Boundary Waters
The interconnected lakes, rivers, and streams in the BWCA make it no place for a sulfide-ore copper mine. The mining industry has a long history of major infrastructure failures with catastrophic environmental impacts. ... State fish and wildlife agencies have identified more than 12,000 species in need of conservation action that would benefit ...
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A fresh approach to sulfide ores - Canadian Institute of Mining ...
Sulfide Ore Flotihyb DTC-X Collectors – Advancing Greater Selectivity Flotihybs are a family of xanthate dithiocarbamate hybrids. Each product in the family has a unique underlying pKa for the dithiocarbamate group, making them …
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Sulfide - Wikipedia
Sulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S 2− or a compound containing one or more S 2− ions. Solutions of sulfide salts are corrosive. Sulfide also refers to chemical compounds large families of inorganic and organic compounds, e.g. lead sulfide and dimethyl sulfide. Hydrogen sulfide (H 2 S) and bisulfide (SH −) are the …
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Crustal sulfur is required to form magmatic Ni–Cu sulfide deposits ...
Process models for ore formation in magmatic Ni–Cu–platinum group element (PGE) sulfide systems require that S saturation is achieved in a mafic–ultramafic magma. Traditional models explain the achievement of S saturation or sulfide saturation either by the addition of crustal S, by the felsification of the magma by crustal contamination, or by mixing …
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Sulfide Minerals - ThoughtCo
Galena forms in low- and medium-temperature ore veins, along with other sulfide minerals, carbonate minerals, and quartz. These can be found in igneous or sedimentary rocks. ... because some vital enzymes require an …
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nickel processing - Extraction and refining | Britannica
From laterite ores. Being free of sulfur, laterite nickel deposits do not cause a pollution problem as do the sulfide ores, but they do require substantial energy input, and their mining can have a detrimental effect on the environment (e.g., soil erosion). The range of process options is limited by the nature of the ore.
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Health Risks Need to be Considered When Deciding on Sulfide-ore Copper ...
HEALTH RISKS NEED TO BE CONSIDERED WHEN DECIDING ABOUT SULFIDE-ORE COPPER MINING. ... Sulfide-ore copper mining is a toxic industry with a very poor track record of success. A peer-reviewed Earthworks study in 2012 showed that of modern US copper mines that had operated for 5 years or more had already polluted water. …
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Sulfide mining debate continues, despite lack of need
Meanwhile, Twin Metals, the other major sulfide ore mine proposal in Minnesota, faces stronger headwinds. The Biden Administration has begun the process of seeking a 20-year ban on sulfide mining on federal lands surrounding the Boundary Waters, a watershed threatened by Twin Metals. However,this is not a permanent end to this threat.
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