Some prospectors are interested in the methods of processing sulfide ores to extract their values. The two of the best known processes are smelting and roasting. The two are actually different methods, but both involve …
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copper sulfide ores is simply applicable for another copper processing methods including oxide ... The results show that the net present value of the mine production is increased by 3% compared to ...
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The invention relates to a method for processing sulfide ores containing precious metals, such as copper ores containing nickel. According to the method, the ore or concentrate (1) containing the precious metals is leached (2), and the iron contained in the solution is neutralized in oxidizing conditions by means of a ferrous recirculation solution (6) …
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Surface oxidation of the sulfide minerals negatively affects the flotation performance, i.e., the selectivity and even the recoveries at heavy oxidation conditions. Oxidation may take place during the formation of the ore, during mining and stockpiling, and during the flotation process. Stockpiling of large amounts of ore is a common practice in …
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37 rowsMineral - Sulfides, Crystals, Properties: This important class includes most of the ore minerals. The similar but rarer sulfarsenides are grouped here as well. Sulfide …
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Selenides, tellurides, arsenides, antimonides, bismuthinite, and sulfosalts are the major classes of sulphide ores. Sulfides are mostly opaque with different color variations and different streaks. The color of mineral powder obtained from sulfide minerals is known as the Streak. The non-opaque varieties have a high refractive index.
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An understanding of the genesis of sulfide-ore deposits has developed through systematic geological, petrographic, compositional, and isotopic studies of ores and host rocks. In this article, the compositions, crystal structures, physical properties, and certain aspects of mineral chemistry and geological occurrence of the major sulfide ...
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The migratory characteristic of iron and its effects on the oxidative dissolution of low-grade polymetallic Ni–Cu–Fe-bearing sulfide ores in sulfuric acid solutions were investigated. This study involved three parts. First, the influence of Fe on the Ni and Cu leaching efficiencies was measured using leaching tests. It was revealed that the …
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This process uses a series of physical steps and high temperatures to extract and purify copper from copper sulfide ores, in four basic steps: 1) froth flotation, 2) thickening, 3) smelting, and 4) electrolysis. Following mining, transporting, and crushing to a consistent gravel or golf ball-size, the crushed ore is further processed at a mill ...
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Metal sulfide is described as another big group of photocatalyst materials used for the reduction of CO 2.The photocatalysts of metal sulfide involves CdS, ZnS, MnS, Cu x Ag y In z Zn k S solid solutions, and Cu 2 ZnSnS 4, which have been utilized for photoreduction of CO 2 in different solvents. Metal sulfides have small band gaps with higher VB as …
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Analyses of sulfide ores in the Matsumine and Fukazawa deposits showed that the Zn-rich black ores have low δ 56 Fe values (as low as −1.78‰), whereas the Cu-rich yellow ores have values of ca. −0.5‰, similar to those of dissolved Fe in seafloor hydrothermal fluids (Fig. 5 b).
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Straight pyritic ores, where the pyrite is present in small quantities, usually yield their gold to fine grinding and cyanidation alone. Silver ores containing the values as polybasite, stephanite, pyrargyrite …
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The U.S. Bureau of Mines developed an alkaline oxidative pretreatment to increase the recovery of gold from refractory sulfide ores containing arsenopyrite (FeAsS) and/or pyrite (FeS2). Pretreatment of a low grade ore containing 0.4% FeAsS, 3.5% FeS2, and 2.74g/mt Au with 1.2M NaOH, 40 psig 02, 100° C, and 4 hr in a 2-L autoclave …
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The mineralogy and texture of Ni-sulfide ores at the Nkomati nickel mine are highly variable, and this results in often erratic nickel recovery at the mine. The variability of the ore presents an opportunity to study the influence of grind size on the flotation-based recovery of Ni in highly heterogeneous sulfide ores, which would be applicable to this …
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The process steps of the two methods of magmatic sulfide ores can be found in Figure 4. Chlorine and acid leaches can also be used to separate and concentrate the nickel, with the final step of hydrometallurgy being electrowinning. Fig. 4: Flow Sheet of the Processing of Magmatic Sulfide Ores (Natural Environment Research Council, 2008)
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Ni and Co are locally enriched compared to the average values measured in sulfide ores (Gilg et al. 2006), where these elements occur as tiny inclusions of Ni and Co arsenides in quartz. Table 2 Selected trace element concentration (parts per million) of some Angouran smithsonite samples.
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Impure nickel, refined by smelting sulfide ores in a blast furnace, can be converted into metal from 99.90% to 99.99% purity by the Mond process. The primary reaction involved in the Mond process is: Ni(s) + 4CO(g) = Ni(CO)(g) Given that the spontaneity of the above reaction is temperature-dependent, without using values, predict the sign of ...
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The self-heating of sulfide ores is an unsteady process with positive persistence and obvious mutation, so the possibility of self-heating of sulfide ores can be determined according to the change characteristics of Hurst index. ... min and 819 min, respectively, reference values of self-heating initiative temperature are 219.4°C and …
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It is a common practice in processing pyritic gold ores to remove as much gold and sulfide as possible by gravity treatment and/or flotation. Classically, the arsenopyrite concentrate is contacted with mercury to recover the free gold contents. ... The high silver values in the minus 325- mesh fraction indicate that these values occur in a ...
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The flotation of copper sulphide ores is mainly carried out by using thiol collectors (e.g., xanthate, dithiocarbamates and dithiophosphates), which form different surface products in different copper sulphide minerals. ... Its variation (zeta potential value) with respect to the pH reveals the extensive presence of a copper hydroxide layer ...
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ROASTING OF SULFIDE MINERALS In addition to common metals like copper, lead, zinc, and nickel a number of other ... for the recovery of nonferrous values. ... or for the elimination of unwanted metals as vola-tilized oxides. Roasting of speiss for As 2O 3 recovery and of bismuth ores for the removalofAs,SborZn(astheiroxides ...
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Flowsheet for treatment of Copper Sulfide ores rich in minerals such as chalcopyrite with gold and silver as well as arsenopyrite. The above flowsheet is designed for the treatment by flotation of copper …
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This study aims to characterize the whole reaction process of (i) emulsion explosive matrix and sulfide ores, and (ii) ammonium nitrate and pyrite by the thermodynamics analysis method. A series of experiments were carried out at atmospheric pressure from 25 °C to 350 °C at four heating rates (3, 5, 10, and 15 K/min) and the …
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The bulk conductivity of sulfide-bearing rocks is highly variable, with pyrite ores ranging from 0.1 S/m to 10 4 S/m and pyrrhotite ores ranging from 10 3 S/m to 10 5 S/m (Parasnis, 1956 ...
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AEROPHINE Ⓡ promoters are mining reagents for separations, in the flotation process, designed using unique phosphorus collector chemistry for the efficient recovery of precious metal and base metal sulfide values from ores. They have particular affinity toward precious metals and their minerals, as well as Cu and Pb sulfides. AEROPHINE Ⓡ …
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For a better understanding of the relationship between the standard reduction potential, the strength of metal activity, and the method used for its reduction you have to look at TABLE 21.2. in the book.. The more active metal is, the harder it is to reduce it to the form of free metal, and it is represented with the value of the standard reduction potential that is …
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The sulphide ores located at depth and made up of chalcopyrite and bornite as Cu minerals, and carollite as a Co mineral. These minerals also occur as fine grains disseminated in the dolomitic gangue. ... Most recommended collectors have critical pH values below 6 for the flotation of pyrite (Wills & Napier-Munn, 2006). Thiocarbamate …
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With the vigorously growing demand of the steel industry, corrosion resistance alloys, clean energy industries, and a variety of engineered infrastructure or technology, high-grade nickel ores are being exhausted gradually in the world. This review outlines metallurgical processes for nickel production from various nickel sulfide ores …
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ROASTING OF SULFIDE MINERALS In addition to common metals like copper, lead, zinc, and nickel a number of other ... for the recovery of nonferrous values. ... or for the …
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The δ 34 S values of CRMS at Eagle are from 3 to 3.9 ‰, which are within the range of the values for the intrusion-hosted magmatic sulfide ores of this deposit (Ding et al. 2012b). None of the Eagle CRMS samples from this study shows a Δ 33 S anomaly.
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For elongation, values nearing 0 signify more or less equidimensional particles, whereas values closer to 1 correspond to very elongate or oblong particles. ... For the nickel sulfide ores studied, apart from overall particle density, sulfide texture is observed to be the main mineralogical control on the individual particle recovery by DMS ...
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Non-zero δ 34 S values of the Jinchuan sulfide ores and the barren wall rocks suggest that the crustal contamination occurred before the magmas entered the Jinchuan intrusion (Ripley et al. 2005). On the other hand, elevation of f O2 could convert Fe 2+ into Fe 3+ and reduce S solubility of the magma (Li and Ripley 2005).
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In this study, a new method to determine the iron grade in iron sulfide ores was proposed by using perchloric acid. The iron grade of a high pyrite-containing ore …
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This process produces magmatic sulfide deposits, which are the most important sources of platinum, palladium, chromium, and several other metals. Cumulate sulfide minerals include ... (PbS) and sphalerite (ZnS). Fluorite (CaF 2) is common but has little economic value. Weathered or altered MVT ores may contain anglesite (PbSO4), cerussite ...
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However, this "burning" or roasting of the sulfide ores does work well to convert rebellious ores into a more free milling state, allowing the values to be extracted. Exact temperatures used in roasting vary, and excessive temperatures can cause problems, including melting the sulfides before they can oxidize.
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The ores of sulfide copper-nickel, copper-pyrite deposits, and ores of copper sandstones and slates are primarily processed abroad. The amount of copper in copper sandstones and slates varies from 1 to 6%, in sulfide copper-nickel ores from 1.1 to 4.9%, in copper-pyrite ores from 0.1 to 3%, and in copper-porphyry ores from 0.4 to 1.2%.
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