The effect of grinding media on pyrite flotation in the presence of collector was tested in the absence of Pb 2+ or Cu 2+. With either mild steel or 30% chromium medium, pyrite displayed very poor flotation. Around 8% recovery was obtained in 8 min of flotation in the presence of collector DBPhos or DTP. It is well known that pyrite displays ...
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Grinding media have significant influence on the flotation of chalcopyrite and pyrite. This effect is mainly related to the change in the surface properties of chalcopyrite and pyrite. This paper investigates the influence of steel ball and nano-ceramic ball grinding on the floatability of chalcopyrite and pyrite. Flotation results, as well-scanning electron …
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Apart from the influence on the grinding cost, the choice of grinding media is essential to optimize the flotation response of valuable sulfide minerals. For example, the comprehensive review of the influence of different types of grinding media on flotation of copper sulfide minerals was published by Bruckard et al. (2011). However, in the ...
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Stirred media mills are used by the mining industry for ultrafine grinding to enhance liberation, and to decrease particle sizes of industrial minerals to tailor functional properties. This review describes stirred media mill technologies and operating principles, and summarises stress intensity theory which can be used for selecting efficient …
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Although the effects of grinding media on chalcopyrite grinding and flotation performance have been investigated by several researchers (Peng et al., 2003b, Peng et al., 2017, Liu et al., 2018, Molaei et al., 2018), the literature lacks more systematic studies, especially pertaining to particle size composition, and pulp and surface properties.
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Fig. 4 shows the effect of grinding media, the type of purging gas, and the dosage of copper (II) ions during grinding on the cumulative flotation recovery of arsenopyrite after 8 min (pH 7). It can be seen that the type of grinding media is a predominant factor in determining the floatability of arsenopyrite, whilst the type of …
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active forged steel grinding media may be used in the primary grinding stage. This paper discusses the impact of such a circuit on the pulp chemistry and flotation response of a refractory gold ore.
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A similar observation was found by Bradshaw et al. (2006) and Ekmekçi et al. (2006) who investigated the effect of different grinding media on the flotation of Merensky ores. Fig. 7 also shows that after grinding with mild steel media, mass and copper recovery was increased slightly from 5% to 8%, and from 28% to 36%, respectively, …
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As the main copper-bearing sulfide minerals in cyanide tailings, how to improve the flotation recovery of chalcopyrite is of great significance to the comprehensive management of bulk solid waste. To obtain higher leaching rate of precious metals, fine grinding is required.However, the production of numerous interfering ions, accompanied …
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The pretreatment processes consisting of grinding followed by roasting were investigated to improve the selective leaching of Nd and Dy from neodymium-iron-boron (NdFeB) magnet scraps. The peaks of Nd(OH)3 and Fe were observed in XRD results after grinding with NaOH as the amount of water addition increased to 5 cm3. These results …
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ABSTRACT. The efficiency of grinding and flotation process in copper-molybdenum processing circuit, largely affected by performance of thickeners and hydrocyclones …
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The flotation behaviour of copper minerals in the Northparkes Mines copper gold ore is dependent on grinding media and hence grinding Eh and aeration during conditioning
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Different milling conditions, such as wet or dry, and use of different grinding media have a great impact on the flotation performance of sulphide minerals. In the present study, the effects of wet and dry grinding and the use of different grinding media, such as mild steel (MS) and stainless steel (SS), were investigated on a Cu-sulphide ore. The …
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The breakage and liberation of minerals are the key to fluidized mining for minerals. In the ball milling process, steel balls function as not only a grinding action implementer but also energy carrier to determine the breakage behavior of ores and the production capacity of the mill. When ground products present a much coarse or much …
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In the present study, the effects of wet and dry grinding and the use of different grinding media, such as mild steel (MS) and stainless steel (SS), were …
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In the present study, the effects of wet and dry grinding and the use of different grinding media, such as mild steel (MS) and stainless steel (SS), were investigated on a Cu-sulphide ore.
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In the absence of NaHS, grinding using stainless steel media increased the kinetics of subsequent copper mineral flotation compared to the use of mild steel media. …
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Effect of grinding media and NaHS on copper recovery at northparkes mines Author FREEMAN, W. A 1; NEWELL, R 1; QUAST, K. B 1 [1] School of Geoscience, Minerals …
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After 60 min grinding, the effect of grinding media type on the flotation recovery of galena was investigated. Table 1 shows the effect of grinding media type on galena recovery. It can be seen that the galena wet-ground with mild steel media has a lower galena recovery than galena wet-ground with stainless steel media.
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It was found that grinding media had a different effect on pyrite flotation at pH 5.0 and 7.0. At pH 5.0, both iron contamination originating from grinding media and xanthate oxidation played an important role in pyrite flotation. While iron contamination on the pyrite surface depressed pyrite flotation, it might be reduced by xanthate oxidation.
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Grinding media have significant influence on the flotation of chalcopyrite and pyrite. This effect is mainly related to the change in the surface properties of chalcopyrite and pyrite. This paper ...
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When stainless steel grinding media was used, the copper flotation recovery was very high (>90 % in the rougher stage) without the addition of NaHS, so its use was not warranted. The flotation of the bornite was not reduced by oxidation, in fact copper mineral recovery was the highest under the most oxidising grinding conditions.
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The results also showed that the pyrite recovery was slightly higher when the grinding was performed with the forged steel media rather than with the chromium media or the ceramic media. XPS and EDTA extraction technique demonstrated that the forged steel media produced more iron hydroxide species than the 18% chromium or the …
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grinding media became less reactive, and resulted in increasing exposure of the lead sulphide surface. These findings were consistent with the EDTA extraction data provided in Table II. These results suggest that the iron debris from forged steel grinding media can have a significant deleterious effect on the flotation performance of fine (-3 ...
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These results suggest that the iron debris from traditional forged grinding media can have a significant deleterious effect on the flotation performance of fine (−10 μm) galena. By changing the media type to an inert material (i.e. ceramic grinding media) the galena flotation response can be markedly improved.
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Abstract and Figures. In the current research work, influences of particle size, grinding time, and agitation rate on the flotation of a copper sample from Sungun copper mine (E. Azerbaijan, Iran ...
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The grinding medium has a significant effect on the flotation performance of chalcopyrite. Flotation kinetics is considered an excellent tool for evaluating flotation performance. In this study, the effects of two grinding media, cast iron balls (CIB) and ceramic balls (CB), on the flotation kinetics of chalcopyrite were investigated.
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The grinding conditions affect significantly the subsequent flotation stage of this sulphide copper ore. The presence of iron ions in the slurry is deleterious to the flotation of copper minerals and may be avoided by the utilisation of lined mills and non-ferrous or corrosion resistant grinding media, such as stainless steel or pebbles.
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It was observed that grinding media shape (spherical, eclipsoids, cube, cylpebs, etc) can influence the performance of a tumbling mill. The media can directly affect the breakage rate, mill load behavior, power draw, and generally energy consumption. In other words, there is a strong relationship between the type of media and the …
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3.1. Effect of Grinding Media on Galena Flotation. 3.1.1. Galena Flotation. The influence of five types of grinding media (mild steel, 10% chromium, 20% chromium, cast iron and ceramic media) on galena flotation behavior (purged with air) is shown in Figure 1. It can be seen that ceramic grinding medium produced maximum galena recovery and mild ...
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Apart from the influence on the grinding cost, the choice of grinding media is essential to optimize the flotation response of valuable sulfide minerals. For example, the comprehensive review of the influence of different types of grinding media on flotation of copper sulfide minerals was published by Bruckard et al. (2011).
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Grinding media are moved by a rotating electromagnetic field. Forces acting between rods and feed create grinding effect. There are also additional chaotic movements introduced because of collisions …
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In the absence of NaHS, grinding using stainless steel media increased the kinetics of subsequent copper mineral flotation compared to the use of mild steel …
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The grinding media could exhibit various effects on the flotation pulp, such as pH, redox potential, dissolved oxygen and ion concentration (Song et al., 2018). It has been found that porcelain grinding medium could reduce the galvanic interaction between porphyry copper and the corresponding grinding medium, ultimately
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Effect of grinding media on the surface of chalcopyrite. After grinding, a series of characteristics were carried out on the ground samples, including surface morphology and wettability, so as to explore the influence of grinding media on the surface properties of chalcopyrite. ... Biogenic sulphide for cyanide recycle and copper recovery …
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