Sphalerite: The primary ore of zinc and a collector's …
Sphalerite is the most commonly encountered zinc mineral and the world's most important ore of zinc. Dozens of countries have mines that produce …
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Recycling process water in sulfide flotation, Part B: Effect of H
Hydrogen peroxide production was measured during the grinding of a complex sulfide ore, and its oxidizing effect on solid surfaces was investigated using Fourier transform infrared spectroscopy (FTIR) with diffuse reflectance attachment measurement. In turn, an attempt was made to correlate the formation of hydrogen peroxide, surface oxidation and …
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Robert R. Seal | U.S. Geological Survey
Molecular-scale speciation of germanium and copper within sphalerite from Central Tennessee mining district (TN), Red Dog mining district (AK), and Metaline mining district (WA) ... The United States' supply of critical minerals has been a concern and a source of potential strategic vulnerabilities for U.S. economic and national security ...
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A Deposit Model for Mississippi Valley-Type Lead-Zinc Ores
Sample of spheroidal sphalerite with dendritic sphalerite, galena, and iron sulfides (pyrite plus marcasite) from the Pomorzany mine. Note the "up direction" is indicated by "snow-on-the-roof" texture of galena and sphalerite alnong colloform layers of light-colored spahlerite. Hydrothermal sulfide clasts in the left center
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Sphalerite
Sphalerite ( (Zn,Fe)S) is a sulfide mineral and is an important ore of zinc. It can come in a wide variety of colors such as light/dark brown, red-brown, yellow, red, green, light blue, black, and colorless. Sphalerite occurs …
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Germanium redistribution during weathering of Zn mine wastes
In wastes at this site we find that Ge has been redistributed from its original host, sphalerite (ZnS), to the fine-grained weathering product hemimorphite (Zn 4 Si 2 O 7 (OH) 2 ·H 2 O), which impacts germanium's mobility, bioaccessibility, and potential for recovery. We provide chemical and mineralogical evidence of this redistribution, along ...
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Flotation Mechanism of Sphalerite by Sulfuration–Amine Method
Sphalerite is a common sulfide mineral, and xanthate is usually used as the collector of sphalerite flotation. In order to realize the simultaneous flotation of sphalerite- and zinc-containing oxide ores, in this paper, dodecylamine was used as the collector and sodium sulfide as the regulator to explore the flotation behavior of sphalerite in a …
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The flotation of sphalerite mine tailings as a remediation method
Sphalerite tailings are the most important type of waste in the mining district of Sardinia. This situation justifies the interest in the applicability of flotation as a …
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Insight into mineral flotation fundamentals through the DFT method
Besides, the effects of different impurity types on sphalerite crystals were investigated too [45]. The finding showed that the bandgap of sphalerite was larger than that of the perfect structure after adding 3d transition elements (e.g., Mn, Fe, Co, Ni, and Cu) and rare elements (e.g., Ga, Ge, and In).
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Galena – WGNHS – UW–Madison
Galena crystals surrounded by marcasite, from Shullsburg, Wisconsin. (Photo by W. Cordua.) Galena is formed in a wide range of hydrothermal environments. It can be found with sphalerite and chalcopyrite in massive sulfide deposits associated with meta-volcanic rocks, such as the Crandon deposit near Rhinelander. It is a component of some …
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Potential environmental risk of natural particulate
Abstract Cadmium (Cd)-bearing sphalerite and smithsonite ore particles are ubiquitous in soils near metal-mining areas. Previous studies indicate that smithsonite is …
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Effect of Physisorption of Collector on Activation of Flotation of
The studies into the mechanism of activation of sphalerite flotation by ions of heavy metals show that neither ion exchange nor electrochemistry explain the experimental facts, namely, activation of flotation of copper mineral by lead ions, activation of sphalerite flotation by zinc, or flotation in the presence of non-conducting surface layer with silver or …
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Critical Minerals in Arkansas
The majority of mining was by surface techniques, but during the WW II there was also underground production. By-products include Gallium (Ga) and Titanium (Ti) and Niobium (Nb). ... The US Bureau of Mines resource estimate in 1954 was 150 million pounds of Nb metal from mine waste fines and the bauxite deposits. In Pulaski and Saline Counties ...
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Advances in depressants used for pyrite flotation separation
Pyrite (FeS 2), one of the most common sulfide minerals, is not only associated with coal and nonferrous metals (chalcopyrite, galena, and sphalerite) (Wang and Forssberg 1991), but also it is the primary carrier of some precious metals such as gold and silver (Bi et al. 2020).Existence of pyrite in minerals and coal greatly affects their …
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Zinc Mining and Processing: Everything you Need to Know
Compared to tin mining, the history of zinc mining is relatively short. In the 18th century, it was discovered that sphalerite, or zinc sulfide, could be smelted into brass, resulting in the first patented techniques. Since then, the zinc industry has progressed to the current zinc mining process and production methods used today.
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Sphalerite | Zinc Ore, Ore Mining & Ore Processing
In the United States the most important sphalerite deposits are those in the Mississippi River valley region. There sphalerite is found associated …
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The impact of former mining activity on soils and plants in the
Human activity is considered to be the major source of pollution and contamination by potentially toxic metals in soils. Among the various causes of this type of contamination we can mention mining and the processing of metals, which are linked to several environmental problems (e.g. acid mine drainage, impact on the landscape, and …
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Sulfide remobilization and trace element redistribution during
Permian sphalerite is significantly enriched in In (up to 2500 μg/g In) relative to two sphalerite generations of Cretaceous veins. The latter have higher Ge (up to 2700 μg/g Ge) and Ga (up to ...
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Sphalerite weathering and controls on Zn and Cd migration in
Degraded water quality and environmental impacts caused by weathering of sulfide-bearing mine wastes are a legacy remaining at many historical mine sites. Release and mobilization of toxic metals (e.g., Zn and Cd) in mine drainage are often associated with weathering of primary sulfide minerals and precipitation and dissolution of secondary minerals. This …
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Sphalerite weathering and controls on Zn and Cd migration in
Degraded water quality and environmental impacts caused by weathering of sulfide-bearing mine wastes are a legacy remaining at many historical mine sites.
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Potential environmental risk of natural particulate cadmium and …
Introduction. Sulfide (e.g., sphalerite) and oxide (e.g., smithsonite) zinc (Zn) ores are important mineral resources that have been exploited extensively worldwide for …
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How can metal mining impact the environment?
Material adapted from: Hudson, T.L, Fox, F.D., and Plumlee, G.S. 1999. Metal Mining and the Environment, p. 7,20-27,31-35,38-39. Published by the American Geosciences Institute Environmental Awareness Series. Modern mining operations actively strive to mitigate potential environmental consequences of extracting metals, and such operations are …
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Flotation of Copper Ores with High Cu/Zn Ratio: Effects of Pyrite …
Porphyry copper deposits are important sources of copper and typically processed by flotation to produce copper concentrates. As mining areas become deeper, the amounts of impurities, such as sphalerite, can be increased in copper ores, so the appropriate depression of sphalerite floatability should be achieved to obtain saleable copper …
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Trace metal element pollution of soil and water resources caused …
The mineralization of this area is mainly composed of sphalerite (ZnS), pyrite (FeS 2), and galena (PbS), which are the main sources of the high trace metal concentrations in the tailings and in the surrounding mining sites (Liu et al. 2013). The soil is mainly composed of sandy loam, with a pH ranging from 6.5 to 7.5.
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Sphalerite Oxidation in Seawater with Covellite: Implications …
metal sulfide mining and the accompanying neutral and acid mine drainage reactions have occurred on land. 1 However, interest in characterizing sulfide mineral reactivity in the
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A Review on Novel Techniques for Chalcopyrite Ore …
1.2. Chalcopyrite Ore Production The sulfide ore minerals including chalcopyrite (CuFeS 2), sphalerite (ZnS), galena (PbS) provide the major sources of the world's base metals (Cu, Zn, Pb, respectively), …
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3 Modern Gold Mining Operations | The Potential Impacts of Gold Mining
The Potential Impacts of Gold Mining in ia. Washington, DC: The National Academies Press. doi: 10.17226/26643. ... (e.g., as sulfides such as chalcopyrite or sphalerite). ... Although mercury is no longer used in modern gold mining operations in the United States, it is discussed here because earlier use in ia has left residual ...
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Chalcopyrite (Cu) Sphalerite (Zn) Separation by Flotation
Copper 3.78%. Sulphur 42.38%. Zinc 12.45%. Gold 0.01 oz/ton. Iron 32.84%. Silver 1.50 oz/ton. Insoluble 8.50%. In order to meet smelter requirements it is desired to produce at least a 20% copper concentrate with not over 8% zinc. The copper is present principally as chalcopyrite in extremely close association with both the sphalerite and …
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Bioleaching of Zn from sphalerite using Leptospirillum ferriphilum
Biological methods for leaching of nonferrous and noble metals from its sulfide ores are widely applied at industrial enterprises of different countries. This process is based on the use of the oxidative activity of acidophilic microorganisms. Since all bio systems are quite sensitive to the temperature, bacterial leaching process also significantly effects. In …
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Flotation Recovery of Sphalerite in Sea Water: A Feasibility Study …
This paper examines the feasibility of flotation recovery of sphalerite with sulphhydryl collectors in artificial sea water using small-scale techniques to investigate the possible effects of flotation recovery of sphalerite from base metals ores in sea water. 2. Materials and Methods. 2.1.
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