Molecular dynamics simulation of siderite-hematite-quartz flotation
Oleic acid and oleate are widely used in the flotation separation of iron minerals. Shibata and Fuerstenau [16] indicated that sodium oleate can work as both collector and flocculant in flotation of fine hematite. Electrostatics interaction and hydrophobic interaction reinforced oleate adsorption on hematite surface.
(PDF) Flotation of Iron Ores: A Review
the flotation of hematite. Cationic reverse flotation was initially developed by the. ... flotation collector is an unneutralized primary ether amine, and corn starch is again added as a depressant.
A review of hematite flotation using 12-carbon chain …
The most studied hydroxamate for mineral flotation is octyl hydroxamate (C8). A common maximum in adsorption and flotation of many oxide minerals using …
A review of hematite flotation using 12-carbon chain …
A review of hematite flotation using 12-carbon chain collectors | Semantic Scholar. DOI: 10.1016/S0892-6875 (00)00119-9. Corpus ID: 97561138.
Flotation of Quartz and Hematite: Adsorption Mechanism …
The reduced solubility of the longer fatty acid carbon chains made these reagents ineffective and inefficient as flotation agents. At higher collector dosages, high hematite recoveries are ...
Adsorption mechanism of mixed collector systems …
The study revealed that hematite flotation recovery is maximum at acidic pH with sulphate, at neutral pH 6–7 with oleate, and at basic pH about 9.5 with C 12 amine. …
Role of Mixed Cationic/Anionic Collector Systems on Hematite Flotation
However, the reverse cationic flotation of magnetite ore with mixed collectors has been investigated very recently [10]. Thus, the aim of the present work is to understand the adsorption phenomena and the role of mixed collector systems on hematite flotation. 2. Experimental Procedure 2.1.
Research Progress of Flotation Collector in Hematite …
Research Progress of Flotation Collector in Hematite Flotation. September 2013. DOI: Authors: Wei Zhi Wang. Meng Qing Lei. Chun Guang Yang. Request full-text. …
Adsorption mechanism of mixed collector systems on hematite flotation
The flotation response of both quartz and hematite with cationic and anionic collectors in isolation and with mixed cationic / anionic collector systems was evaluated as well.
Effect and mechanism of dolomite with different size …
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 …
Differential adsorption of a high-performance collector at solid–liquid
It was worth mentioning that with the collector DEOSA, the significant recovery differences of two minerals were observed in a wide pH range of 2.48–9.04, indicating that DEOSA had high flotation selectivity for quartz against hematite. Although the flotation difference between hematite and quartz at pH 9.04 was slightly greater …
Three-phase froth stability in hematite flotation using DDA as a collector
The effect of hematite and quartz with different particle sizes on the three-phase froth stability using dodecylamine (DDA) as a collector was investigated, and the mechanism of how quartz improves froth stability was explored. Microflotation experiment, three-phase froth stability experiment, froth morphology photography, pulp viscosity measurement, …
An evaluation of hydroxamate collectors for malachite flotation
The implementation of a high-performance collector represents a promising strategy for enhancing mineral recovery. In this study, the flotation performance of hydroxamic acid was firstly investigated by examining the flotation behavior of pyrochlore, calcite, feldspar, and quartz using aromatic hydroxamates (AHA), namely methyl …
Research Progress of Flotation Collector in Hematite Flotation
Abstract. The article based on several iron ore flotation processes at home and abroad described the collectors at home and abroad development as the flotation process of constantly improving. For ...
Design and flotation performance of a novel hydroxy …
Flotation recoveries of quartz and hematite as a function of pH value with DMPDA as the collector (15.0 mg/L). The effects of DMPDA concentration on the recoveries of quartz and hematite were investigated under the natural pH value of the slurry (pH Quartz = 7.23, pH Hematite = 7.42).
New perspectives in iron ore flotation: Use of collector …
An increase in collector concentration leads to the increased quartz recovery due to the increased quantity of the collector deduced from the higher peak intensity (Fig. 16), while the flotation of hematite does not occur or is very low (Fig. 15 a). However, the flotation behaviour of kaolinite is similar to those of hematite while the …
A review of hematite flotation using 12-carbon chain collectors
A number of surfactants containing saturated 12-carbon chain groups were used as collectors over a wide range in pH. The flotation of this hematite with dodecanoic acid (lauric acid) showed a maximum recovery in the pH range 6–8.5, a sudden drop at pH 9, and a steady increase in recovery as the pH was raised from 9–12.
Adsorption mechanism of mixed collector systems on hematite flotation …
The flotation response of hematite as a function of pH at fixed cationic and anionic collector concentration is shown in Fig. 1.Results clearly indicate that with cationic C 12 amine collector the flotation recovery increases with the increase of pH till around pH 9.5 and thereafter, the recovery decreases marginally. A maximum recovery, with C 12 …
A review of hematite flotation using 12-carbon chain collectors
Role of Mixed Cationic/Anionic Collector Systems on Hematite Flotation. A. Vidyadhar N. Kumari R. Bhagat. Chemistry, Materials Science. 2011. The adsorption mechanism of mixed cationic alkyl diamine and anionic sulphate/oleate collectors was investigated on hematite through Hallimond flotation studies. The flotation response of …
Three-phase froth stability in hematite flotation using DDA as a collector
The froth half-life was remarkably higher in the presence of quartz particles compared with hematite particles, forming stickier froth, especially for quartz particle sizes below −18 μm. Fine quartz was found to be a key factor in improving the froth stability in hematite flotation using DDA as a collector.
FLOTATION OF QUARTZ AND HEMATITE: ADSORPTION …
The flotation response as a function of pH and collector concentration was investigated. The single mineral flotation tests in the presence of anionic collectors, quartz does not respond to flotation but the C12 amine flotation of quartz was observed to be pH and concentration dependent. It was observed that hematite flotation recovery is ...
FLOTATION CHEMISTRY OF HEMATITE/OLEATE …
In their extensive study, they concluded that fatty acids and their soapsare superior collectors for hematite flotation and among these, sodium oleate is the best collector. …
Eco-Friendly Collectors for Flotation of Fine Hematite …
DDM is the worst collector of both the metal oxides under the conditions studied. The ultrafine particle size significantly improves the grade of hematite in the two-mineral flotation against quartz with NaOl and DDM at pH 5 and 10, as well as in the two-mineral flotation of malachite against quartz with DDM at pH 5.
Green hematite depression for reverse selective …
Flotation of mixed minerals (hematite and quartz mixture in various ratios) indicated that LGB could enhance separation efficiency (hematite recovery > 88%). …
Utilization of novel surfactant N-dodecyl-isopropanolamine as collector …
Flotation tests for a collophane sample subjected to the first reverse flotation for magnesium removal demonstrates that a rough flotation process (using a 0.4 kg·t−1 new collector at pH = 6 ...
Selective Flotation of Quartz from Hematite by Amide …
The selectivity window between quartz and hematite flotation using amide-amine was higher at pH 10.5 (approximately 80% for 5 mg/L). Therefore, the use of starch is not necessary in siliceous itabirite flotation by amide–amine collector. Zeta potential measurements and infrared spectra reveal that the adsorption of amide-amine collector …
Flocculation/flotation of hematite fines with anionic …
Micro-flotation tests by Forbes and Franks (2013) showed that anionic PNIPAM was a feasible collector for separating hematite from a synthetic mixture with silica. Performance in the mids and coarse regions were comparable between PNIPAM and sodium oleate, an industrial collector, and improved recoveries were observed with …
Three-phase froth stability in hematite flotation using DDA as a collector
DOI: 10.1016/j.mineng.2023.108023 Corpus ID: 257360889; Three-phase froth stability in hematite flotation using DDA as a collector @article{Li2023ThreephaseFS, title={Three-phase froth stability in hematite flotation using DDA as a collector}, author={Rongjiao Li and Xi-mei Luo and Shuming Wen and C. Li and Dayong Wei and Wen Yang and Ying …
Molecular dynamics study on selective flotation of hematite …
Flotation recovery of rare earth oxides from hematite–quartz mixture using sodium oleate as a collector G. Abaka-Wood S. Fosu J. Addai-Mensah W. Skinner Materials Science, Chemistry
Potential application of an eco-friendly amine oxide collector …
Then add the collector and condition the slurry for another 2 min, at last, flotation time lasts for 5 min. Taking Fe grade of actual iron ore into account [23], we prepared the artificially mixed mineral by mixing quartz and hematite in the mass ratio of 3:2. After flotation, both concentrates and tailings were collected, oven-dried, weighted ...