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 …
The separation of magnesite from dolomite was studied by flotation tests, X-ray photoelectron spectroscopy (XPS), and zeta potential measurements in the presence of calcium ion (Ca²⁺) dissolved ...
Perspective. Geochemistry. A fluctuating solution to the dolomite problem. Episodes of dissolution and crystal growth stoke the formation of a common carbonate …
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 ...
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 …
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 ...
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 …
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 ...
Flotation is also the best method for recovery of gold from base metal ores and gold-containing PGM ores. Excluding gravity preconcentration, flotation remains the most cost-effective bene ficiation method. Gold itself is a rare metal and the average grades for low-grade deposits vary between 3 and 6 ppm.
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 …
Semantic Scholar extracted view of "The depression effect and mechanism of NSFC on dolomite in the flotation of phosphate ore" by Jun-xia Yu et al. ... 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 …
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 ...
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 …
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 ...
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 ...
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 ...
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 …
The flotation separation of dolomite and fluorapatite is difficult due to the similar surface properties. In this study, carboxymethyl cellulose (CMC) was introduced as a depressant for flotation of dolomite and fluorapatite, the adsorption mechanism of CMC on the mineral surfaces was clarified by DFT calculations, XPS analysis, zeta potential and …
The technical-grade single-mineral samples were ground and sieved to −105 + 38 μm prior to be used in the micro-flotation experiments.In addition, in order to perform spectroscopy studies, a portion of each single mineral was further ground down to an average size <5 μm using an agate mortar to increase mineral surface areas.The …
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 ...
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) …
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 ...
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 …
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 ...
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 …
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 ...
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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To investigate the flotation performance of AECNa, the effects of collector concentration and pH on the recovery of calcite and dolomite were studied and are shown in Fig. 5, Fig. 6. The pH was kept neutral during the collector concentration condition tests, and the collector concentration was kept at 30 mg/L during the pH value condition tests.
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 …
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.
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 …
Flotation is also the best method for recovery of gold from base metal ores and gold-containing PGM ores. Excluding gravity preconcentration, flotation remains the most …
In the ultrasonic environment, both magnesite and dolomite showed increased flotation recovery, with magnesite reaching a recovery rate of 90% after simultaneous ultrasonic flotation treatment. The recovery of dolomite was only 30%. In the flotation test of mixed minerals, the recovery of magnesite increased by 19.6%, and the …
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 ...
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 ...
principles. 3. A mineralogical examination of the ore showed the major. constituents of the same to be quartz, dolomite and feldspar. In addition, the ore contains a small amount …
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 …
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.
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.