Effect of pre-oxidation on copper-lead bulk …
For Cu-Pb bulk concentrate containing 3.03 % Cu and 62.32 % Pb, the use of PAAS combined with H 2 O 2 as a galena depressant for flotation separation yielded …
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For Cu-Pb bulk concentrate containing 3.03 % Cu and 62.32 % Pb, the use of PAAS combined with H 2 O 2 as a galena depressant for flotation separation yielded …
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In this study, a new flotation approach, a low-alkaline and non-desliming process, was introduced for improving lead and zinc recoveries, lowering production cost and reducing environmental pollution.Lab-scale experiments results show that the new process contributed to the flotation of the complex mixed sulfide-oxide lead and zinc ore …
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1. Introduction. In the flotation of complex sulfide ores, the two methods most widely used for the separation of economic amounts of copper and lead are presents as the following: (1) bulk copper/lead flotation followed by copper/lead separation; (2) sequential copper/lead flotation [1].The sequential separation has some disadvantages, for …
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Further selective separation of pyrite from arsenopyrite in an auriferous bulk flotation concentrate, stockpiled in the mine area, could be possible under carefully controlled (flotation) conditions, which would be also beneficial to the gold recovering process. ... These phenomenon lead floatability of arsenopyrite activated in alkaline ...
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The recovery of silver minerals occurring in a lead- zinc sulfide ore is efficiently accomplished using the above flowsheet. The process consists of selective flotation to produce a mixed silver-lead concentrate for maximum smelter return and a separate zinc concentrate. Over-grinding of silver minerals is detrimental to efficient …
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The wet bulk industrial flotation copper–lead concentrate was collected from the first technological line of the Copper Ore Flotation Plant in Lubin which processes bituminous shale-rich part of the ore. The industrial flotation of the copper ore is carried out in the presence of a mixture of sulfhydryl collectors (sodium ethyl xanthate ...
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Gold concentrate of approximately 61,000oz was sold during the first phase. Ore mining under the second phase is expected to begin from 2017 and last for four years to reach a production level of 400,000 tonne a year. The ore will be hauled to the surface through the Olympias decline and will be processed in a flotation circuit.
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Bench-scale flotation experiments showed that the efficient separation of Pb-Fe concentrate was achieved by using a flotation reagent scheme comprising Na 2 SO 3 and CaO depressants and DDTC as collectors. The Pb concentrate in the closed-circuit flotation yielded a Pb recovery of 83.45% with a grade of 58.36%.
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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 mineral/water slurry. The particles with attached air bubbles are then carried to the surface and removed, while ...
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A brief history of the one MCDM method, namely WASPAS, which would be the basis for the solution of the most appropriate Pb-Zn flotation circuit design, is considered in more detail. Zavadskas et al. (2012) proposed and originally described Weighted Aggregated Sum Product Assessment (WASPAS) method. This method aggregates the Weighted …
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The Pb content in the copper concentrate was as low as 12.21%, which was quite similar with that using K 2 Cr 2 O 4 as depressant. Through the comparison of two groups of test results, it demonstrated that the combined depressants H 2 O 2-NaHA could be a potential substitute of dichromate in copper-lead flotation separation.
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The dispersants use in the lead flotation stage did not improve the overall circuit efficiency. Despite enhancing the lead recovery, the reagents caused unacceptable zinc losses in the lead concentrate. Lead flotation either at natural pH or pH 9.8 modified with sodium carbonate or lime presented similar results.
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In this paper, selection of adequate circuit design of lead-zinc froth flotation, which has a significant impact on the processing costs and useful minerals utilization, is considered. …
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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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Both of the final flowsheet made use of regrind stages to allow for recovery of the fine minerals and in the case of Hellyer, this allowed the recovery of each valuable mineral to …
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The mixed concentrate containing Cu 11.57% and Pb 16.75% was preoxidized under the above conditions, and the flotation separation verification results showed that Cu concentrate with Cu grade of ...
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The lead ore concentrate from the flotation tanks now contains about 50% lead and ca 0.1% of silver, a relatively small but valuable amount. (b) Smelting. Smelting is usually a two-stage process as described here, although single-stage methods with lower energy use and emissions are also used.
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This rougher lead flotation concentrate is then delivered by gravity to the cleaner cells. Three cleaner cells are used for triple cleaning of the lead concentrate. This triple cleaning was recommended because of the easily floatable zinc that could not be effectively depressed by conventional zinc depressant reagents. Roughing, plus triple ...
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The wet bulk industrial flotation copper– lead concentrate was collected from the first technological line of the Copper Ore Flotation Plant in Lubin which processes bituminous shale-rich part of the ore. The industrial flotation of the copper ore is carried out in the presence of a mixture of sulfhydryl collectors (sodium ethyl xanthate ...
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Test results showed that by regrinding the first lead cleaner flotation concentrate through 1,600-mesh the grade of lead and the lead recovery were increased about 2 and 4 percent, respectively. Zinc in the lead concentrate was also lowered from 15 to 8 percent. Results of ultrafine grinding on selective lead recovery are shown in table 7.
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In the flotation separation of galena-pyrite mixed concentrate, large amounts of lime (CaO) are used for the depression of pyrite. In this study, the negative effects of lime were reduced by using an efficient depressant Na 2 SO 3 + CaO reagent in the flotation separation of galena from pyrite.
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2.1.2. Copper-lead mixed concentrate The copper-lead sulfide mixed concentrate used in the test was taken from Dali City, Yunnan Province, China. The -400 mesh (-0.038 mm) of the mixed concentrate accounts for 94.41%, which belongs to fine particles and about 80% of the particles are completely dissociated from chalcopyrite and galena, which
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After lead flotation at optimum pH 8, the flotation of zinc at a different pH (5–11.5), with two collector types, was performed to study the recovery and grade of zinc in the zinc concentrate. Figure 8 shows the grade and recovery of zinc in the zinc concentrate using PAX or Aero 3477 collectors at pH 5–11.5.
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In this study, flotation recovery of lead (anglesite) in ZLR from a zinc smelting plant was investigated, and the mechanism studied by using Fourier-transform infrared (FTIR) spectroscopy measurements. The flotation results indicated lead recovery and grade of the concentrates of 76.39% and 47.18%, respectively, after flotation of one …
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For instance, for the flotation separation of a ton of fine copper-molybdenum co-flotation concentrate to be used in this investigation, which assays around 26% Cu and 0.35% Mo with 90–92% mass below 50 μm, a sodium sulfide (Na 2 S) consumption of 20–30 kg was practically required for depression of chalcopyrite against molybdenite …
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During the flotation, lead tends to float with concentrate more than allowed. In this investigation, effects have been made to minimize the loss of Pb to concentrates. This paper as such gave the first effects in optimizing of these parameters with positive effects in the flotation process in Trepca. Download to read the full chapter text.
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Effects of nano-microbubbles water and ore size on lead and zinc flotation was determined. • Fine feed (d 80 =12 μm) was prepared by dry grinding, to fully liberate valuable species.. Fine bubbles simultaneously improved concentrate grade, recovery, and separation efficiency.
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Closed-circuit flotation experiments were performed under an optimised agent regime. The final results after six cycles of testing are shown in Table 4. Pb grade in the Pb concentrate and Zn grade in the Zn concentrate are 11.86% and 32.87%, respectively, which did satisfy the standard for lead concentrate and zinc concentrates.
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After lead flotation at optimum pH 8, the flotation of zinc at a different pH (5–11.5), with two collector types, was performed to study the recovery and grade of zinc in the zinc concentrate.
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Batch-test results showed lead concentrates of 59 to 66 percent Pb with recoveries of 72 to 66 percent. Zinc concentrate grades varied from 50 percent Zn at 96 …
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The results indicate that 43.37% Pb and 66.01% Ag were recovered by the flotation of lead sulfide ore, and the average grades of Pb, Zn and Ag in the Pb concentrate were 52.73%, 10.17% and 7562.37 g/t, respectively.
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On lead-zinc ores, differential flotation of a part of the lead in the form of a high-grade lead concentrate may be accomplished. This fact is, in some cases, held to justify the use of such methods preceding froth flotation. Otherwise the use of skin-flotation methods at present is limited to the case where grade of concentrate …
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In three stage flotation, a lead concentrate with 65.6%Pb content was produced with 46.2% recovery while a concentrate containing 67.5% Pb was produced with 50.85% recovery in six stage flotation. In both cases most of the Zn remained in the tailings. Therefore the following tests run using the same flowsheet in order to investigate the …
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Utilization of polysaccharides as depressants for the flotation separation of copper/lead concentrate March 2013 International Journal of Mining Science and Technology 23(2):179–186
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The bulk concentrate is subsequently conditioned with sodium hydroxide to achieve an approximate 11.5 pH and collector addition from which a lead concentrate is floated. The zinc concentrate is actually the tails from this bulk separation step. The flotation tailing is the zinc concentrate.
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