pyrite flotation fine
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- pyrite flotation fine
The improvement in hydrophilicity and low flotation recovery in the case of pyrite ground with iron medium are mainly due to high surface roughness and serious corrosion. ... Strengthening the flotation recovery of silver by fine grinding with special ceramic-medium stirred mill (SCSM), steel ball-medium stirred mill (SBSM) and ball mill …
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Coarse-particle pyrite is mainly enriched in agglomerated, nodular, and fracture-filling forms, and fine-grained pyrite has a relatively complex occurrence state, including framboidal,...
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Discussions with the Mount Isa geometallurgy teams identified the presence of varying pyrite textures (fine grain and coarse grain) within the flotation feed. From a geometallurgy perspective, it is important to identify periods when a particular "problematic" pyrite texture type will form part of the feed to the processing plant to ...
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Pyrite displays good flotation performance in the presence of xanthate at acidic to neutral pH conditions due to the formation of dixanthogen and possibly iron …
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At depth, however, the proportion of free gold in the ore decreased, and a greater amount was intimately associated with sulphide minerals, mostly pyrite. Fine grinding and cyanidation was tried for …
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@article{osti_4341578, title = {Removal of pyrite from coal by dry separation methods. Report of investigations}, author = {Abel, W T and Zulkoski, M and Brady, G A and Eckerd, J W}, abstractNote = {Sulfur dioxide emissions from coal-burning power plants can be significantly lowered by removing pyrite from the coal prior to buming. . Conventional wet …
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To explore the occurrence and distribution characteristics of fine-grained pyrites in coal and the effect of pyrite particle size on flotation efficiency, coal samples from Guizhou province and ...
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In addition, another important use of flotation is to purify coal, reduce ash in fine coal, and remove fine pyrite from coal. Flotation is also suitable for treating fine and microfine materials, and fine ore particles less than 10 microns, which are difficult to be recovered by other beneficiation methods, can also be treated by flotation.
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Abstract An analysis of flowsheets for processing sulfide and oxide copper ores, reagent modes, processing equipment, and flotation indicators in some domestic and foreign processing plants and productions is carried out. Autogenous and semiautogenous mills are commonly used in the primary grinding stage in ore processing plants, which …
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Flotation experiments for finely ground chalcopyrite (D50 ∼ 3 µm) were conducted with and without coarse pyrite (–125+106 µm) using potassium amyl xanthate as a collector.
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The effects of ultrasonication on the hydrophobicity of oxidized pyrite and the flotation of an oxidized pyrite ore were investigated in this work. Surface examinations show that ultrasonication (≥ 0.3 W/cm 2) could result in surface cleaning and further oxidation of both slightly and heavily oxidized pyrite within 40 s. In the surface cleaning …
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Flotation of Pyrite. Table of Contents. This paper is a record of the first of a series of tests on sulfide minerals to be made by the metallurgical department of the University of California. The purpose of …
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When untreated pyrite was used as the carrier, the attachment of fine chalcopyrite to the carrier was limited, and flotation recovery of fine chalcopyrite was not enhanced. When pyrite was treated with Cu 2+, Cu 2+ was adsorbed on the surface of pyrite; this enhanced its hydrophobicity, which promoted the. Declaration of Competing …
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The complex occurrence morphology and crystal structure of fine-grained pyrite make it difficult to be removed from the coal matrix by ore grinding during …
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The complex occurrence morphology and crystal structure of fine-grained pyrite make it difficult to be removed from the coal matrix by ore grinding during flotation. Fine-grained pyrite mainly occurs in the form of framboïdal pyrite, disseminated pyrite, and monomer pyrite with a size of 0.69-33.94 μm in the middlings and cleaned coal.
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Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are separated …
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Laboratory and pilot-scale flotation tests were conducted to investigate the effect of N-dodecyl mercaptan (NDM) on the flotation of fine pyrite. At bench scale, NDM resulted in higher recovery, and the mixed collector of NDM and potassium isoamyl xanthate (PIAX) (mass ratio of 2:1) caused the highest recovery of 96.5%.
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REAGENTS USED IN FLOTATION OF GOLD ORES. Conditioning agents are commonly used, especially when the ores are partly oxidized. Soda ash is the most widely used regulator of alkalinity. Lime …
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In addition, another important use of flotation is to purify coal, reduce ash in fine coal, and remove fine pyrite from coal. Flotation is also suitable for treating fine …
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Abstract and Figures. Flotation reagents can change the surface properties of minerals, leading to differences in the interaction between mineral particles and affecting the mutual aggregation or ...
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The low flotation recovery of fine particles is mainly due to the low probability of bubble–particle collision, while the main reason for poor flotation recovery of coarse particles is the high ...
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Effect of pyrite textures and composition on flotation performance: A review. Pyrite can have variable textures and chemical composition. Presence of complex …
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Based on a pyrite-gold ore, this technology achieved a gold recovery up to 10% higher than the base line. This technology is commercialized by Kinetic Group Worldwide. Counteracting the adverse effect of cyanide in flotation. Cyanide added to depress gangue minerals or existing in process water can depress the flotation of sulphide and precious ...
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Fine particles were more likely to become hydrophilic under low-temperature plasma modification and yet the critical oxidation degree was also higher. The coarse particles being plasma modification presented a poor flotation recovery due to its low adsorption density of collector, although its oxidation degree was lower than the fine size …
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Special Issue Information. Froth flotation is the most economical method to separate minerals in ores. However, the complexity of new ore bodies requires fine grinding to liberate valuable minerals, which produces particles with sizes too fine for an efficient mineral flotation and separation.
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The results of pyrite flotation with ethyl xanthate indicate that the formation of ferric dihydroxy ethyl xanthate on pyrite surfaces can either improve or deteriorate the floatability of pyrite, depending on the concentration of ethyl xanthate. ... Zeta potential measurements 100 mg of the fine pyrite fraction ( - 20/~m) was conditioned in a ...
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Flotation reagents can change the surface properties of minerals, leading to differences in the interaction between mineral particles and affecting the mutual aggregation or dispersion of particles. In this work, we studied the role of activator copper sulfate, collector butyl xanthate and frother terpineol in adjusting the potential energy of pyrite …
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Pyrite flotation can be significantly depressed by fine serpentine (−10 µm) due to the hetero-coagulation between pyrite and serpentine at pH 9. However, when …
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The flotation of pyrite as a function of pH and oxidation level in the presence of SBX is shown in Fig. 2. It can be seen from Fig. 2 that pyrite alone had good floatability for which the recovery values are all above 88.02% in an acid or slightly alkaline solution. However, the flotation recovery sharply decreased to 57.75% at pH 12.17.
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Pyrite particles, having framboidal/altered texture, are known to significantly affect pulp chemistry and adversely affect flotation performance. Therefore, the main objectives of this study were to demonstrate influence of pyrite mineralogy on the flotation of copper (sulphidic) ores and develop alternative conditions to improve the performance. …
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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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In this paper, it is shown that flotation of liberated pyrite due to its intrinsic hydrophobicity is not an important mechanism for recovery of pyrite from freshly ground …
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