(PDF) Activation of Dolomite Flotation by Ferrous
PDF | The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold.... | Find, read …
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PDF | The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold.... | Find, read …
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Abstract: It is well documented that flotation has high economic viability for the beneficiation of valuable minerals when their main ore bodies contain magnesium (Mg) …
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The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in ...
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The difference between the dolomite recovery (49.00 %) and magnesite recovery (5.00 %) was smaller when DDA was used than when other collectors were used [13]. Magnesite and dolomite are sparingly water-soluble carbonate minerals. In flotation tests of individual minerals, magnesite and dolomite show marked differences in …
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Flotation Separation of Dolomite from Magnesite Surface characterizations of dolomite and magnesite indicate that their separation from each other is quite complicated; however, separation can be achieved using flotation at optimum conditions aided by using modifiers along with collectors. pH and mineral dissolution are cardinal for their ...
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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 should not be used because it is a depressor of free gold and inhibits pyrite flotation. Sodium sulphide is often helpful in the flotation of …
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Accordingly, fatty acids proved to be highly efficient in acidic pH conditions. Moreover, dolomite flotation appeared to be far more successful than calcite. The …
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The flotation performance of dolomite and apatite in … Expand. 1. Save. Effect of pre-oxidation on copper-lead bulk concentrate flotation separation with sodium polyacrylate as galena depressant. Jinpeng Cai X. Jia +5 authors Dian-wen Liu. Chemistry, Engineering. Separation and Purification Technology.
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Semantic Scholar extracted view of "Selective flotation of magnesite from dolomite using α-chloro-oleate acid as collector" by Wenxing Zhong et al. Skip to search form Skip to ... with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms ...
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In copper–gold ore flotation, it was found that when content of fine calcite and dolomite increased, the pulp rheology became complicated and exhibited obvious shear thickening behaviors [28,29], coupled with deteriorated copper beneficiation. The reason might be the dissolution of the calcium-containing minerals, which could interfere …
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Calcite and dolomite were found to be less soluble and exhibited a lower interaction with these clay minerals. This study also investigated the interaction of the …
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Flotation feed and the test products (i.e., concentrates and tailings) were dried in an oven at 60 °C and analyzed for Pb and Zn contents by complexometric titration with EDTA as titrant and xylenol orange as indicator [14, 34].The procedure includes digestion of 1 g solid sample in a 250-ml glass beaker by 15 ml of concentrated HCI and …
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Results of the micro flotation tests show that NaOL exhibits good selectivity in the fluorapatite /dolomite flotation separation when H 2 SO 4 or H 3 PO 4 is used as inhibitor (Fig. 2 and Fig. 3). According to previous studies, the chemical reactions of fluorapatite in an aqueous solution are as follows [58], [59], [60]: (1) Ca 5 (P O 4) 3 F (S ...
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The flotation experiments were carried out to apply this new process using the calcareous phosphate ore. Under the optimum flotation conditions, 0.04% cellulase and 0.5 mM oleic acid, a phosphate ...
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In this study, we used NaF as a flotation activator to separate dolomite and fluorapatite to reduce acid consumption in the flotation process. Both single and actual mineral flotations were conducted. The NaF addition significantly improved the floatability of dolomite and reduced the flotation system's acid consumption. We employed X-ray ...
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The flotation separation of magnesium-bearing carbonates (magnesite and dolomite) from non-salt-type minerals (hematite, gold-bearing sulfides, and monazite) is typically less difficult as ...
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Dolomite is a common rock-forming mineral. It is a calcium magnesium carbonate with a chemical composition of CaMg (CO 3) 2. It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone.
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Abstract. The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in dolomite flotation are still not fully understood.
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Artificial mixed flotation tests were conducted using 1.5 g of fluorapatite and 0.5 g of dolomite samples. In the flotation experiment, depressants were added first, followed by pH adjustment of the slurry, and then the collectors were introduced. The pH regulator and flotation reagents were allowed to react for 1 min and 3 min, respectively.
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The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in dolomite flotation are still not fully understood. Herein, the correlation of Fe2+ conversion with xanthate adsorption and dolomite flotation was ...
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The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in dolomite flotation are still not fully understood. Herein, the correlation of Fe2+ conversion with xanthate adsorption and dolomite flotation was …
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The flotation performance of apatite and dolomite was investigated to ensure the optimal pH value and NaOl concentration for apatite, the flotation results present in Fig. 3, as exhibited in Fig. 3 (a), in the presence of 1 × 10 −4 mol/L NaOl, the apatite flotation recovery rose with the increasing pH, and it remained nearly constant with ...
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Abstract: The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation …
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In the field of mineral processing, the successful flotation of target minerals requires sufficient liberation through grinding. The aim of this paper is to compare and evaluate the performance of ball versus short cylindrical media for comminution of dolomite by point and line contact, respectively. The results of the grinding experiments indicate …
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This paper presents a comprehensive study on the selective flotation of a multi calcium-bearing minerals ore, focusing on the efficient removal of dolomite and calcite impurities from a carbonaceous sedimentary phosphate ore. Commercial fatty acid (FA) and phosphate ester collectors were investigated in a reverse flotation process, assessing …
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1. Introduction. Flotation is known as a separation process, based on the introduction of gas bubbles as the. transport medium. Suspended particulate matter, being hydrophobic or conditioned to be ...
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The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in ...
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The surface interactions and adsorption mechanism of alkyl hydroxamic acid bearing collectors and sodium silicate depressant on common carbonatite gangue minerals, including calcite, dolomite and ankerite in flotation were investigated. For this purpose, firstly the flotation behaviors of these minerals in the presence of the collector and …
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Reflecting on the flotation test in Fig. 13, Atrac 50L successfully recovered a carbonate concentrate assaying 78.23% carbonate (calcite and dolomite), but it also captured 12% CFA. Among these CFA particles, 22% existed as free particles, while the remaining 78% were mainly associated with calcite and dolomite.
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This study presents a predictive geometallurgical model for the Ouansimi copper deposit in Morocco, focusing on the flotation of mixed copper ores. The deposit was divided into two geometallurgical domains (GMD) with distinct oxidation rates using K-means clustering. The principal component analysis-partial least squares regression …
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Smithsonite, dolomite, and calcite are carbonate minerals. The crystal structures and spatial distribution characteristics of their common surface metal sites are similar, leading to difficulty in the flotation separation of smithsonite from these carbonate gangues. In this paper, the floatability of smithsonite, dolomite, and calcite in sodium …
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Abstract: The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation …
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The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in ...
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The major problem with Carlin-type gold deposit flotation is that the high dolomite content in the concentrate decreases the quality of gold. Further, the activation mechanisms involved in ...
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Perspective. Geochemistry. A fluctuating solution to the dolomite problem. Episodes of dissolution and crystal growth stoke the formation of a common carbonate …
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The effects of Ca2+, Mg2+, Al3+, and Fe3+ on the flotation behaviors of apatite, dolomite and quartz were investigated through a micro-flotation test, and the influence of calcium ions on the flotation of these minerals was further elucidated by solution chemistry study, zeta potential measurement, and X-ray photoelectron spectroscopy (XPS) analyses. The …
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Effect of NaOL concentration on apatite and dolomite flotation recovery (pH = 9.0). Fig. 4 shows the effect of pH on apatite and dolomite flotation recovery with respect to the pulp pH at 7.5 × 10 −5 mol/L NaOL in the absence and presence of pectin. In the absence of pectin, the recoveries of apatite and dolomite went beyond 80 % as a ...
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The gold leaching rates observed for the dolomite-bearing flotation concentrates (3.34–3.52 × 10 −12 mol m −2 s −1, first 30 min) were generally greater than that of the apatite-bearing flotation concentrate (1.02–1.35 × 10 −12 mol m −2 s −1, first 30 min), independent of the agitation rate deployed.
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The effect of dolomite with different particle size fractions on hematite flotation was studied using sodium oleate as collector at pH of about 9. The effect mechanism of dolomite on hematite flotation was investigated by means of solution chemistry, ultraviolet spectrophotometry (UV), inductively coupled plasma atomic emission spectrometry (ICP …
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