1. Introduction. Chalcopyrite (CuFeS 2) is one of the primary copper sulphide minerals and it accounts for 70–80% of the global copper (Cu) reserves (Baba et al., 2012, Nyembwe et al., 2019, Schlesinger et al., 2011).Froth flotation is usually applied to concentrate copper ores and separate copper minerals from the gangue. Currently, there …
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The chemical assay and mineralogy analysis of dam copper flotation tailings indicate low Fe grade (6.34 wt%), high SiO2 grade (63.14 wt%), low magnetite …
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Grades and recoveries of Cu and Mo in concentrate and tailing in chalcopyrite-molybdenite bulk roughing flotation with the increase of CaO (a), BX (b), PGA (c), and Z200 (d) dosages. The new reagent scheme was to use the depressant PGA and the collector Z200 two environmentally friendly flotation reagents to replace CaO and …
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Chalcopyrite concentrates are taken in a tank and leached using mechanical agitation. In stirred tank processes, highly aerated and continuous-flow reactors placed in series are used to treat the minerals. ... In the GEOCOAT ® process, sulfide flotation or gravity concentrate slurry is coated onto crushed and sized support rock which may be ...
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Clay minerals are known to negatively affect sulfur flotation. In the present study, the effect of clay minerals (kaolinite-montmorillonite) on chalcopyrite flotation was investigated and it was aimed to propose solutions to eliminate the negative effects. In the experimental studies, ζ-potential measurements and flotation experiments were carried …
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This study focused on the selective galena depressive mechanism of tea polyphenol in chalcopyrite flotation. The mixed mineral flotation experiments yielded a copper recovery rate of 83.07 % and a copper grade of 29.32 % for the copper concentrate, as well as a lead recovery rate of 91.13 % and a lead grade of 71.37 % in the lead …
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The other chalcopyrite in the flotation tailings was covered with an oxidation layer consisting of O, Fe, S, Pb, Cu, Zn, and Si. (a) Effect of collector dosage …
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In the flotation of chalcopyrite, the cyanide-ZnSO 4 mixture had a greater depressing effect on sphalerite than the dextrin-ZnSO 4 mixture. When using cyanide, ... Reprocessing of a Southern Chilean Zn Tailing by Flotation - A Case Study. Minerals, 8 (2018), p. 295, 10.3390/min8070295. View in Scopus Google Scholar. Bagci et al., 2007.
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The interface characteristics of cyanide tailings are different from those of the raw ore. In this study, valuable elements could not be thoroughly recovered via the flotation of cyanide tailings from Shandong, China. The interface and floatability of these tailings were investigated by phase analysis and flotation tests. The chalcopyrite in the cyanide …
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Flotation circuit designs for polymetallic ores are investigated. • Stage recovery uncertainty does not affect the flotation circuit structure. • The tailing generation without sulfur species was included using a most proactive approach. • Three types of circuit designs are analyzed, including bulk and selective flotation stages. •
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In flotation, fine particles do not collide with air bubbles hence the low recovery of fines to froth. Fig. 2 shows the experimental results of flotation vs model …
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The results showed an improvement in flotation and flocculation performance when tests were carried out with treated seawater at pH > 10.5, where the copper recovery increased from 82% to 95%, compared to seawater without salt removal; meanwhile, the settling rate of flocculated tailing increased from 5.0 m/h to 11.5 m/h. As expected, the ...
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(1) ε 1 = m 1 m 1 + m 2 × 100 % (2) ε 2 = γ × β α × 100 % where ε 1 is the flotation recovery of chalcopyrite or pyrite, m 1 and m 2 are the weight (g) of …
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Copper Recovery and Reduction of Environmental Loading from Mine Tailings by High-Pressure Leaching and SX-EW Process. The flotation tailings obtained from Bor Copper Mine contain pyrite (FeS2) and chalcopyrite (CuFeS2), these sulfide minerals are known to promote acid mine drainage (AMD) which poses a serious threat….
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This paper describes a study aiming at producing a magnetite pellet feed as a by-product from a dam chalcopyrite flotation tailings and generating free magnetite non-magnetic rougher tailings ...
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In Fig. 3 it is interesting to note that the partial desalination treatment of seawater in the chalcopyrite flotation with clay content increased the recovery by up to 95% compared to the clay system using seawater at pH 11 (82% copper recovery), but the flotation rate became slower because the kinetic constant was reduced from 0.70 to …
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EPMA-WDS was employed to analyze the phenomenon responsible for the low flotation recovery of chalcopyrite and pyrite in this tailing. The research methodology is a useful reference for further ...
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Chalcopyrite is the main copper bearing mineral in the cyanide tailing. Flotation is a commonly used method in industry in order to recover copper from cyanide tailings. However, the change of surface properties of chalcopyrite caused by cyanide leaching hinders the effective flotation of chalcopyrite.
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In this study, chalcopyrite flotation was performed with different types of water which are tap water, recycling water, tailing dam water (TDW) and acid mine drainage (AMD) in order to investigate ...
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3.2 Depressing Chalcopyrite Flotation by Reducing Pulp Potential. ... In processing plants, the prefloat cleaner flotation tailing will be combined to rougher flotation feed or rougher flotation concentrate depending on plant operation flowsheet and ore mineralogy. Due to the relatively low flow rate of the prefloat cleaner tailing stream …
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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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The interface characteristics of cyanide tailings are different from those of the raw ore. In this study, valuable elements could not be thoroughly recovered via the …
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The predominant copper-bearing mineral was chalcopyrite, which was closely intergrown with orthoclase and muscovite rather than quartz. ... B. Babel, M. Penz, E. Schach, S. Boehme, and M. Rudolph, Re-processing of a southern Chilean Zn tailing by flotation—A case study, Minerals, 8(2018), No. 7, p. 295. Article CAS Google Scholar ...
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The pyrite grade in the fresh tailing sample and in the flotation product was determined indirectly from the content sulfur, copper and iron. Calculations carried out considering the elemental chemical composition presented in Table 1 and the mineralogical species that contained sulfur, identified by the XRD analysis, allowed to determine that …
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In this regard, three different kinetic flotation models such as Classical model, Klimpel model, and fully mixed reactor model were applied to evaluate the batch flotation results. The results ...
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High level Eh or dissolved oxygen provides more energies to prompt the collector-induced and self-induced flotation of chalcopyrite [10]. Moreover, the Eh 290 …
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Flotation recovery was calculated as following: (1) ε = m 1 m 1 + m 2 × 100 % where ε denotes the flotation recovery, m 1 is the mass of concentrate and m 2 is the mass of tailing. For the mixed minerals flotation tests, arsenopyrite and chalcopyrite were mixed at a ratio of 1:1 to obtain 2.0 g of sample.
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It has been reported that about 2 billion tons of minerals are processed by flotation methods every year (Pearse, 2005), and the consumption of alkyl xanthate, which is one of the most common organic-sulfur-based collectors for the flotation of metallic sulfide minerals (chalcopyrite, galena, sphalerite, and pyrite), is expected to reach ...
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In consideration of the better floatability of molybdenite than chalcopyrite, the selective flotation separation of copper-molybdenum mixed concentrate generally adopts the principle of floating molybdenite and depressing chalcopyrite. ... respectively. And the corresponding ratio of Mo recovery to Cu recovery in Concentrate and Tailing are 1.6 ...
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Although these fine chalcopyrite grains are relatively difficult to capture, in a practical flotation circuit, they should be considered reasonable targets to help improve overall copper recovery to the concentrate. Other losses to the cleaner-scavenger tailing include binary particles of chalcopyrite with sphalerite and pyrite.
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