آخرین محصولات
Adsorption behavior of sodium oleate on iron minerals and …
This work systematically studied the adsorption behavior of sodium oleate (NaOL) on hematite, limonite, and siderite and their corresponding flotation performance at alkaline pH. The adsorption behavior and conformation of NaOL on mineral surfaces were investigated using zeta potential analysis, Fourier-transform infrared (FT-IR) spectroscopy, X-ray photoelectron …
Interactive Effects in Mineral Flotation Process
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 ...
Role of dissolved mineral species in quartz flotation and …
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 …
Effect and mechanism of citric acid on flotation …
The pulp adopted in single mineral flotation test was prepared by adding 2.0 g of mineral and 20 cm 3 of deionized water to the 30 cm 3 ... analyzer (Yao et al., 2016). The mineral particles (pure siderite or hematite) were finely ground to -0.005 mm in an agate mortar. A suspension containing 0.04 wt.-% solids (20 mg of minerals and 50 : 3: of cm
Upgrading nickel in laterite ores by flotation
QEMSCAN data showed the absence of nickel in the siderite phase. If siderite is the main carbonate mineral in sample S, its low flotation can be explained by its low affinity to the hydroxamate collector because iron in siderite is mainly in Fe(II) state (Miller et al., 2002).
Molecular dynamics simulation of siderite-hematite-quartz flotation
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 ...
Electromagnetic Separation Siderite & Blende
Siderite has been separated magnetically after calcination for its value as iron ore: the separation of siderite from chalcopyrite will be taken up in a later chapter. The magnetic tailing from most European mills finds a market as iron ore. …
SIDERITE ORE PHYSICAL SEPARATION AND REVERSE …
This paper describes the various mineral processing techniques used in the preparation of glass sand: hydrocyclones, attrition scrubbers, hydrosizers, magnetic …
Molecular arrangement of starch, Ca2+ and oleate ions in the siderite …
Based on the negative effects caused by siderite in the reverse flotation of hematite, different molecular arrangement and adsorption behaviors of flotation reagents on siderite, hematite and quartz were investigated by molecular simulations in order that the mechanism of depressant, activator and collector would be clearly understood and the …
Regulating effects of citric acid and pregelatinized starch on
Mineral samples of siderite, hematite and quartz were obtained from Liaoning Province in China. ... Single mineral flotation showed that gelatinized starch (GS) selectively depressed the barite flotation with different size fractions while it had little effect on fluorite flotation using sodium oleate (NaOl) as the collector, suggesting the ...
Effective reverse flotation separation of siderite from …
To effectively separate siderite from hornblende, pentaethoxylated tallow amine (PTA) was introduced as a hornblende collector for the first time and its selective collection …
Effective reverse flotation separation of siderite from …
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 …
Iron Oxide Ore Mineralogy and Its Plant Flotation Circuits …
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 ...
Role of dissolved mineral species in quartz flotation and siderite …
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 …
Adsorption of Pregelatinized Starch for Selective Flocculation …
Pregelatinized starch (PS) was used for the selective flocculation and flotation of fine siderite in a carbonate-containing iron ore. With PS, the flotation of fine siderite was improved. The repulsive forces between fine siderite particles …
Effect and mechanism of citric acid on flotation separation of siderite …
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 …
Role of dissolved mineral species in quartz flotation and siderite …
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 ...
Utilisation of hydroxamates in minerals froth flotation
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 ...
Effect of siderite dissolution on mineral particles interaction …
The effects of carbonate minerals (dolomite and siderite) on the flotation of hematite using sodium oleate as a collector were investigated through flotation tests, supplemented by dissolution ...
Molecular dynamics simulation of siderite-hematite-quartz …
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.
Siderite's green revolution: From tailings to an eco-friendly …
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 …
Innovative flotation for the utilisation of carbonate-bearing (siderite
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
Effect and mechanism of siderite on reverse flotation of …
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 …
Regulating effects of citric acid and pregelatinized starch on
Research describing the flotation of fine and ultrafine minerals has gained increasing attention [[10], [11], [12]].Flocculation flotation is a common method used for the separation of fine particles [[13], [14], [15]].Farrokhpay et al. studied the selective flocculation of nickel in a laterite ore and concluded that selective flocculation could reduce the adverse …
Comparative effects of sodium silicate and citric acid on …
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 …
Adsorption changes of starch on minerals in carbonate-containing iron
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.
Effect of siderite dissolution on mineral particles …
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.
Mechanism of ultrasonic cavitation to improve the effect of siderite …
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 ...
Effect and mechanism of siderite on reverse anionic …
the pure mineral flotation tests were conducted using sodium oleate as collector, corn starch as depressant of iron minerals and calcium chloride as activator of quartz to discuss the effect of siderite on reverse flotation of hematite. This work aimed to investigate the effect mechanism of siderite on reverse flotation of hematite by
A feasible strategy for depressant-free flotation separation …
Anionic direct flotation and cationic reverse flotation are two important ways to recover iron iron oxide minerals (e.g., siderite, hematite and magnetite) from associated silicate mineral such as quartz and magnesiohornblende [6], [12], [13], [14]. The difference between the two lies in the types of flotation collectors [15].
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