Pyrite–Coal Depressants Interactions During Coal Reverse …
This work investigates coal desulfurization by using reverse flotation. In this method, pyrite (the only source of sulfur in the studied coal) was separated from the meta …
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The application of KMnO4 in reverse flotation separation of
The peaks between 161 eV and 164 eV can be attributed to sulfur in chalcopyrite, primarily representing monosulfide or ... In the reverse flotation system with DDA as the cationic collector, the depression mechanism of KMnO 4 on the separation of chalcopyrite and talc is illustrated in Fig. 16. Download: Download high-res image (189KB ...
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Reverse Flotation
Reverse flotation was applied to recover a sedimentary phosphate ore (Iran) characterised by a low-grade (5.01% P 2 O 5) and the presence of calcite, quartz, and apatite (Mohammadkhani et al., 2011). The fatty acid collectors were used to recover phosphate from carbonate minerals. ... Sulfur, % Yield or recovery (wt%) % ash in feed % ash in ...
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Sulfur reduction in Sangan iron ore by flotation
identified as high sulfur magnetite ore. The grade of sulfur in this anomaly varied from 1 to 8 percent which is higher than the norm of iron ore. Pyrite is the main source of sulfur in this ore which is accompanied with less amount pyrrhotite. So in order to reduce the sulfur content, reverse flotation was designed in concentration plant.
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Reverse Flotation
Reverse flotation of coal can be explained as a process where valuable minerals are depressed, while undesired and unhealthy minerals are floated with the help of some reagents.
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Reverse flotation separation of hematite from quartz assisted with
Good experimental results were obtained as follows: the iron grade increased to 57.17%, iron recovery was 89.94%, sulfur content decreased from 0.66% to 0.26%, reverse flotation of sulfur foam concentrate contained almost 15.68% sulfur, the upgrade ratio was about 23, and the cobalt in the sulfur concentrate was enriched 20-fold.
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An overview of reverse flotation process for coal
Contrary to this, reverse flotation of coal in which coal particles are depressed and gangue particles floated, was developed as an alternative process to minimise the sulphur content in the coal. This method can also be applied to reduce the ash content of coal by floating the mineral matter present in coal.
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Flotation Sulfur Reverse
At present, reverse flotation is one of the most effective ways to achieve desulfurization of low-grade bauxite [5]. Nowadays, the common reverse flotation collector in desulfurization of high-sulfur bauxite is xanthate, but it has unstable chemical properties, weak selectivity and some neurotoxicity [6]. In addition, it will decompose under ...
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Effect and mechanism of quaternary ammonium salt ionic liquid …
Firstly, it was used as a flotation collector for reverse flotation of silicates and sulfur from diaspore-type high-sulfur and high silicon bauxite. Results demonstrated that maximum Al 2 O 3 recovery of 50.8% were achieved, the sulfur content and the ratio of A/S were 0.65% and 3.24. The results showed the 1401 has a stronger collecting ...
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Flotation Decarbonization and Desulfurization of a …
In this study, butyl xanthate and terpenic oil were applied in the reverse flotation for the simultaneous decarbonization and desulfurization of high-sulfur bauxite. After the batch flotation and open-circuit flotation tests, it was …
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[PDF] Reverse Flotation
Reverse flotation of coal can be explained as a process where valuable minerals are depressed, while undesired and unhealthy minerals are floated with the help of some reagents. Nowadays, conventional enrichment method of coal could not achieve remov - ing unhealthy minerals partially from internal structure of coal such as sulfur, Hg, Au, which …
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Pyrite–Coal Depressants Interactions During Coal Reverse Flotation …
This work investigates coal desulfurization by using reverse flotation. In this method, pyrite (the only source of sulfur in the studied coal) was separated from the meta-bituminous coal by using three different coal depressants (starch, dextrin and humic acid). A novel variable elimination approach was used to determine the contribution of the depressant type and the depressant …
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(PDF) Desulfurization of hematitic concentrate of iron ore of the …
Reverse flotation is an effective method to reduce sulfur from magnetic separators concentrate. The aim of this study is to investigate the effect of operational variables on flotation column ...
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Employing sulfur–phosphorus mixed acid as a depressant: a …
The flotation tests revealed that the sulfur–phosphorus mixed acid could depress the apatite effectively. ... Reverse flotation tests on monominerals and artificially mixed minerals of hematite ...
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Sulphur removal of iron ore tailings by flotation
Reverse flotation located at the end of the primary treatment circuit (high- and low-intensity magnetic separation) will lower a large amount of the sulphur from magnetic separator concentrate. The effects of various operating parameters such as concentrations of collector, frother, depressant and activator, pH, solid-in-pulp concentration have ...
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Two-stage reverse flotation technology of calcareous-siliceous
Download scientific diagram | Two-stage reverse flotation technology of calcareous-siliceous phosphorite ore. from publication: Flotation experimental research of calcareous–siliceous ...
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Sulfur content reduction of iron concentrate by reverse flotation
In this study, the desulphurization of iron ore concentrate using reverse flotation was investigated. In this paper first, behavior of the flotation of both pure – pyrite and iron …
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Application of magnetic separation and reverse anionic flotation to
A five-stage successive reverse flotation followed by three stages of magnetic separation at 1000 G was carried out in the second flowsheet. The final recovery and grade of iron for this flowsheet were 77.15% and 64.3%, respectively. The ultimate content of sulfur was estimated at 0.74%.
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Sulfur content reduction of iron concentrate by reverse flotation
In this study, the desulphurization of iron ore concentrate using reverse flotation was investigated. In this paper first, behavior of the flotation of both pure – pyrite and iron oxides-pyrite with xanthate has been examined based on micro-flotation results and zeta-potential measurements. ... the maximum recovery of total sulfur was ...
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Synthesis and characterization of a novel collector for the
Fine high-sulfur bauxite flotation desulfurization is a great challenge presently. This study aims to synthesize nanoparticle collectors (NPCs) by emulsion polymerization to improve the abovesaid ...
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Reverse flotation of cut-of-grade of Lakhra coal
Three process parameters such as pH (7, 8, 9, 10, 11), particle mesh size (60, 100, 150, 200), and % solids (10, 15, 20, 25, 30) in flotation pulp have been investigated with …
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DESULFURIZATION OF IRON ORE CONCENTRATE …
were examined for desulfurization process using reverse floatation: 1) grinding the produced concentrate by low intensity magnetic separators (Final concentrate of plant) and flotation of …
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Reverse flotation of cut-of-grade of Lakhra coal | Request PDF
Request PDF | Reverse flotation of cut-of-grade of Lakhra coal | The selective mining activities have generated a huge quantity of poor grade coal that is rich in mineral matter and sulfur content ...
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Flotation Desulfurization of Acidified High-Sulfur Bauxite
The desulfurization of high-sulfur bauxite via flotation is more difficult than conventional sulphide, since the finely disseminated sulphide in the high-sulfur bauxite can lead to excessive particle entrainment, increase of froth, and low separation efficiency. ... Hu et al. researched the phosphate effection on the reverse flotation system ...
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Synthesis and characterization of a novel collector for the
This work investigates coal desulfurization by using reverse flotation. In this method, pyrite (the only source of sulfur in the studied coal) was separated from the meta-bituminous coal by using…
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Synchronous Desulfurization and Desilication of Low-Grade and …
In order to offer high grade concentrate to produce alumina by Bayer, the reverse-flotation technology of bauxite was investigated. The results show that sodium hexmetaphosphate has different ...
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Reverse Flotation
Reverse flotation occurs when the desired fraction is kept in the slurry and the undesirable fraction is floated in the froth. You might find these chapters and articles relevant to this topic. J.S. …
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Assessment of the effect of iron magnetic concentrate …
One of the methods to reduce sulfur is to use the reverse flotation method (the flotation of pyrite as tailings). Pyrite flotation by thiols is well known. Xanthates have an excellent adsorption capacity on the pyrite surface. In addition, the pyrite surface can oxide xanthate to dixanthogen, which improves pyrite flotation up to pH 11(Nakhaei ...
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Research on the Desulfurization of High Sulfur Bauxite
High content of sulfur in bauxite limits the use of high-sulfur bauxite in the production of Bayer alumina. Flotation process was employed for the desulfurization of bauxite in this work. Effects of particle size of the high-sulfur bauxite, flotation agent dosage, pulp pH main flotation parameters on the sulfur removal rate were mainly discussed. And the optimum …
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Synchronous Desulfurization and Desilication of Low-Grade …
and High-Sulfur Bauxite by a Flotation Process Wencui Chai, Guihong Han, Yanfang Huang, Yijun Cao, and Jiongtian Liu Abstract The existence of sulfur and silica in bauxite influence the product quality of Bayer alumina. The synchronous desulfurization and desilication of low-grade and high-sulfur bauxite through reverse flotation processes
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