Affiliations 1 Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43, Prague 2, Czech Republic. [email protected].; 2 Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43, Prague 2, Czech …
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The iron ore used in this experiment was obtained from Hejing, Xinjiang Province, China and was crushed and grounded to −2.0 mm. the iron ore is composed of 47.04% Fe, 20.33% SiO 2, 2.85% Al 2 O 3, 2.62% CaO and small amounts of other elements, as indicated in Table 1.The Pb and Zn fractions reach 0.39% and 0.30%, …
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The removal percentage of Cu was determined under different experimental conditions. The removal percentage of Cu is plotted as a function of the amount of CaCl 2, roasting time, roasting temperature, and acidity coefficient in Fig. 2. As the CaCl 2 content increased from 6 to 15 %, the removal percentage of Cu increased from 77.3 to 89.9 % …
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The ores normally consist of more than 50% Zn, as well as iron (Fe), lead (Pb), cadmium (Cd), copper (Cu), silver (Ag), arsenic (As) and some other metals. ... Compared to the hydrometallurgy, the furnaces have maximum heat economy serving as a heat exchanger. Dust problem is also minimum due to ore being in the form of large …
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Bi in the waste acid leaching residue was recovered as bismuth oxychloride via chloride leaching-hydrolysis precipitation, and Pb was enriched in the form of PbSO 4 in the chloride leaching reside (i.e. lead concentrate). 99.0% of total Cu, 86.8% of total Zn, 81.7% of total Cd, 90.4% of total Bi and 98.9% of total Pb in the CSO dust and waste ...
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The dust normally contains desirable metals (Cu, In, Pb, Zn, Sb, and Bi) as well as unfavorable toxic elements (As and Cd), thereby frequently being classified as hazardous waste which must be further treated.6 Generally, the disposal of dust is by landfill or by return to the smelting process.7,8 However, due to increasingly stringent …
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Figure 5.2 shows the concentration of HSO 4 − and SO 4 2− ions resulting from the dissociation of H 2 SO 4 acid versus H 2 SO 4 concentration. HSO 4 − is the bisulfate anion and SO 4 2− is the sulfate anion. K a1 and K a2 are the acid dissociation constants. Although nearly sulfuric acid can be made, the subsequent loss of SO …
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Request PDF | Bioaccessibility of As, Cu, Pb, and Zn in mine waste, urban soil, and road dust in the historical mining village of Kaňk, Czech Republic | Historical mining activities in the ...
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The results of the preliminary tests demonstrated that the Cu-Pb-Zn bulk flotation and partial Cu-Pb bulk flotation, followed by separation deal with a complex process flowsheet and reagent scheme, were difficult to realize the purposes of "discarding gangue minerals as soon as possible" as well as the Cu-Pb-Zn separation, …
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The ores normally consist of more than 50% Zn, as well as iron (Fe), lead (Pb), cadmium (Cd), copper (Cu), silver (Ag), arsenic (As) and some other metals. The …
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Toxicity characteristic leaching procedure test revealed that the F, Cu, Pb and Zn leaching contents were 46 mg/L, 4.58 mg/L, 2.17 mg/L and 10.71 mg/L, respectively, which are below their standard ...
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Taknar polymetal (Cu-Zn-Au-Ag-Pb) deposit is located in the northeast of Iran, about 280 km southwest of Mashhad city. The massive sulfide of Taknar deposit is part of meta volcanic-sedimentary ...
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In this research, flotation of copper, lead and zinc minerals from a copper oxide–sulfide ore was studied. The identification tests showed that the sample is a mixture of quartz, chalcopyrite, galena, cerussite, hemimorphite and iron oxide minerals with 5.04% CuO, 1.61% PbO, 2.07% ZnO and 56.40% SiO2. The experimental design methodology …
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Vehicular traffic on unpaved haul roads of the opencast mines has been identified as the most prolific source of fugitive dust. An intensive study was carried out in Noamundi Iron ore mines of Tata Iron and Steel Co. in January–February 1994 to characterize the airborne aerosol mainly contributed from unpaved haul road, traffic …
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In this research, flotation of copper, lead and zinc minerals from a copper oxide–sulfide ore was studied. The identification tests showed that the sample is a mixture of quartz, chalcopyrite ...
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XRD analysis confirmed the presence of Pb and Zn sulfides, Pb carbonates, Pb sulfate, and Pb oxides in urban dust, both as individual particles and agglomerates.
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Cu and Zn were also strongly correlated (r = 0.82), and they had a weaker correlation with Pb (Pb-Cu, r = 0.5; Pb-Zn, r = 0.35). This seems to indicate that Fe and Mn are elements that can share similar sources; in fact, they have been reported as elements of natural or mixed origin ( Dehghani et al., 2016 ), in studies of heavy metals.
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Street dust samples were collected from five different types of land use patterns (busy traffic zone, urban residential area, national highways, industrial area and sensitive area) in a medium sized industrial city Asansol, India.The samples were fractionated into ≤53 µm and analyzed for potential toxic elements (PTEs) viz. Zn, Cd, …
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Pb–Zn–Cu complex ore from Balıkesir–İvrindi district have been concentrated by GESOM A.Ş. using a selective mechanical flotation technique. Ore feeds containing 3.23% Pb, 0.52% Cu, and 2.71% Zn were … Expand
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The Orne River, a tributary of the Moselle River, was highly impacted by industrial activities for more than one century. Land use along the Orne River is highly contrasted, with local specificity from its source to its junction with the Moselle River. The intense industrial activity left behind tons of steelmaking wastes (SMW) on the land …
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The increases in the concentrations of these elements in the sediments are a matter of great concern, especially considering that some of them, such as Cr, Ni, Cu, Cd, Hg and As, presented ...
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WET AND DRY GRINDING METHODS EFFECT ON THE FLOTATION OF TAKNAR Cu-Zn SULPHIDE ORE USING A MIXED COLLECTOR. ... Cu=0.33-2.56%, Zn=0.3-7.7%, Pb=93-5000 (ppm), Au=0.33-11 (ppm), Ag=19-105 (ppm), Bi ...
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Fig. 2 shows the schematic diagram of the intergrated hydrometallurgical process in this study. First, H 2 SO 4 solution was used to extract Cu, As, Zn and Cd from CSO dust, and Cu and As were precipitated out of leaching solution in succession by iron powder cementation and iron salt precipitation. The dissovled Zn and Cd were …
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The order of potential ecological harm degree of heavy metal was as follows: Cd > Hg > As > Cu > Ni > Pb > Cr > Zn. The ER values for As, Cr, Hg, Pb, Cu, Zn, and Ni in all cities were in the low ...
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Chen et al. roasted dust samples at lower temperatures to generate metal sulfates, then leached Cu, Zn and Cd from the calcined material with water, and finally …
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In this study, a clean and efficient hydrometallurgical process was developed to recover Cu, Zn, Cd, Bi and Pb from the CSO dust with waste acid. By waste acid …
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Recently, due to the increase in iron ore cost, some interest arises in the recovery of the Fe units contained in the EAF dust, along with the Zn units. This way, processes based in rotating hearth furnace or channel induction furnace like PRIMUS or PIZO have been developed and installed in a few locations [41, 42]. 1.5.7.2 EAF Slag
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1. Introduction. Copper (Cu) is a significant metal for the society development and scientific progress, and chalcopyrite is one of the main sources [28].Therefore, the efficient separation and enrichment of chalcopyrite appear to be particularly important, especially the flotation separation of chalcopyrite from sphalerite …
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The reverse flotation of the iron ore with etheramine collector is significantly impacted when the iron-bearing silicates and the kaolinite are present in the silicates gangue mineral complex. ... and the 'Cu-Zn' mode selected. For representative purposes, three measurements were performed for each sample. Fig. 3 shows the …
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Collector type and pulp pH play an important role in the lead–zinc ore flotation process. In the current study, the effect of pulp pH and the collector type parameters on the galena and ...
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