The order of the cumulative ultimate recoveries (R ∞) of three minerals was as follows: R ∞-hematite > R ∞-limonite > R ∞-siderite, which was in line with the order of their flotation rate constants (k). This indicated hematite had the highest cumulative ultimate recovery and flotation rate, closely followed by limonite, while siderite ...
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Inter-particle interaction in flotation pulp is an important issue that affects the final separation efficiency [1][2][3][4][5]. Carbonate minerals in carbonate-bearing iron ores, such as siderite ...
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After flotation lasted for 5 min, two products of concentrate (underflow) and tailing (floated) were collected and dried for quantifying the mineral recovery by the dry mass of two products. For each mixed-mineral flotation, 2.00 g of mixed minerals involving siderite and hornblende were used.
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The iron ore at the Donganshan processing plant contains mainly magnetite and hematite fine-grained particles, which are easy to lose in the flotation tailings. 6 In addition, the presence of carbonaceous minerals, mainly siderite, in the ore increased significantly with increasing of the mining depth during development, which impacted both the ...
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Quartz is, in most cases, the major gangue mineral found in the iron ores. Although it can be activated by calcium at strong alkaline pH, quartz nevertheless, reports to the concentrate with Fe when the iron ores contain siderite. It causes a poor concentrate grade and separation between quartz and iron minerals. The effect of siderite on reverse anionic flotation …
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1. Introduction. Flotation is an efficient method for the separation of ore resources, where hydrophobic mineral particles are attached by air bubbles to separate from the hydrophilic minerals in the pulp [[1], [2], [3]].In recent years, as the high-grade ore deposits are inevitably depleted, the beneficiation of finely disseminated ores is gradually increasing.
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To effectively separate siderite from hornblende, pentaethoxylated tallow amine (PTA) was introduced as a hornblende collector for the first time and its selective collection …
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Polymers are composed of many smaller units connected by covalent bonds, with higher molecular weight and larger molecular structure. Due to their economical efficiency and easy modification, researchers have discovered the potential of polymers as the flotation reagent in mineral processing, including the roles of depressant, flocculant, and frother. This paper …
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The flotation results showed that quartz could be collected effectively at pH 11.0-12.0 in the reverse flotation. For siderite, the recovery peaked at 83.4% at pH 8.0, where siderite presented different floatability from magnetite and hematite. Exploiting such difference, the separation of siderite could be achieved.
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Siderite prevents effective utilization of those ores. It is essential to investigate flotation behavior of siderite-hematite-quartz for processing those iron ores. To this end, flotation of the three pure minerals was carried out in sodium oleate system in this work.
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In the past five years, the number of articles related to ultrasonic mineral flotation has increased by about 50 per year, and the overall trend is on the rise. The most recent developments in ultrasonics for flotation process intensification are reviewed herein, including effects of ultrasound treatment on an aqueous slurry, improvement in flotation methods and …
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This investigation focused on the collection performance and sorption mechanisms of decaethoxylated stearylamine (DSA) applied as a new high-selectivity hornblende collector, to further extend the use of DSA for efficiently recovering siderite from hornblende. The collecting ability of DSA to both minerals was explored via a series of flotation experiments.
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When the minerals were treated with modified starch, a decrease in the absolute value of charges on quartz and siderite enhanced the attachment of siderite to quartz. Thus, to maintain the high grade of the hematite concentrate, a powerful collector for the flotation of agglomerates is necessary for reverse flotation of hematite.
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Flotation results showed that both the grade and recovery of iron decreased with the increasing content of siderite and the decreasing grain sizes. Molecular arrangement of the …
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The interactive effects of mineral flotation mean the influence of the adsorption and surface conversion of more than two minerals on flotation separation in the complex ore flotation system. ... Wang Y F, et al. Effect and mechanism of siderite on reverse anionic flotation of quartz from hematite[J]. Journal of Central South University, 2016 ...
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In microflotation experiments with 1:1 mixtures of an oxide (hematite) and a sparingly soluble mineral (calcite, siderite or apatite) hematite always floated better and a higher mineral solubility hindered selectivity. ... FINAL CONSIDERATIONS The selectivity of minerals flotation with hydroxamates depends on a balance between at least two ...
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Both natural cleavage plane of siderite and calculated plane were used to investigate the flotation of the three minerals. Based on the molecular simulation in solution with water as medium, adsorption quantity and interaction capability of oleate ions on the three minerals indicated that siderite could be collected efficiently by sodium oleate ...
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During the process of flotation practice, fine siderite particles and gangues (such as quartz etc.) always co-exist in the pulp. Though the available literatures are rich in the information about aggregation (flocculation) of single siderite particles, the authors are unaware of any reported data about particles hetero-aggregation for the mixture of siderite and quartz.
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The first direct flotation for siderite was removed and a regular reverse anionic flotation simply by adding MS-2 can be applied to achieve good flotation performance. This also indicates that MS-2 is a powerful dispersant with outstanding selectivity for siderite minerals. 3.4. Surface morphology of flotation concentrates and tailings
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In this study, the effect of siderite dissolution on quartz flotation in the presence and absence of starch and calcium was examined. The role of pH, ions and temperature in the dissolution …
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It was observed that siderite had strong depressive effect on quartz in flotation using sodium oleate as collector, corn starch as depressant of iron minerals and calcium …
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In order to effectively eliminate the effect of fine carbonate minerals on quartz flotation, the influence of fine siderite on quartz flotation was studied as well as the mechanism or role of ultrasonic treatment in the process. The results of adsorption capacity measurement and flotation solution chemical calculation show that fine siderite and its dissolved components …
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Here, we explored the collection behavior of PTA and its recovery effectiveness of siderite from hornblende through flotation experiments. Meanwhile, the selective adsorption mechanism of PTA on the surface of these two mineral was uncovered by zeta potential detection, contact angle analysis, adsorption amount charaterization, and infrared spectrum …
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Heterocoagulation can occur between fine siderite and hematite particles, which would result in the low efficiency of their separation during the flotation process. To date, there have been no mature methods to increase their separation efficiency. In this paper, citric acid was used as a regulator to enhance the slurry dispersion efficiency. Micro-flotation, scanning electron …
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The results of flotation and adsorption tests showed that the effect of siderite on quartz flotation is related to the dissolved siderite species and starch, and siderite significantly influences ...
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Abstract: In order to effectively eliminate the effect of fine carbonate minerals on quartz flotation, the influence of fine siderite on quartz flotation was studied as well as the mechanism or role of ultrasonic treatment in the process. The results of adsorption capacity measurement and flotation solution chemical calculation show that fine ...
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Abstract: The effects of siderite on reverse flotation of hematite were investigated using micro flotation, adsorption tests, and Fourier trans-form infrared spectroscopy. The flotation results …
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Siderite, extensively mined as a natural iron mineral, is often discarded as tailings due to the low grade of the ore and due to the high cost of current sorting technologies. Yet, this mineral has demonstrated significant potential in several …
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Role of dissolved mineral species in quartz flotation and siderite solubility simulation 1243 sieved to obtain particle size fractions in the range of −106+45 μm employed for a pure mineral flotation experiment. X-ray diffraction and chemical analyses showed that siderite, hematite and quartz samples were of high purity. The siderite sample had
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Due to the easy sliming of siderite, heterocoagulation among siderite, hematite and quartz is a major challenge in the flotation of carbonate-bearing iron ore [1, 2].Although a stepped flotation method was proposed and used to treat the iron ore, the grade and recovery of the concentrates decreased with the increasing content and decreasing particle sizes of the …
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نشانی: شماره 1688، جاده شرقی گاوک، منطقه جدید پودونگ، شانگهای، چین.
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