Pyrite recovery mechanisms in coal flotation | Semantic …
A microbiological flotation system that facilitates the removal of pyritic sulfur from coal is reported. The chemoautotrophic bacterium Thiobacillus ferrooxidans is utilized as ... The effectiveness of two-stage reverse flotation for desulfurization of coal is significantly dependent on the microstructural features of the heavy mineral ...
Minerals | Free Full-Text | Selective Flotation of Elemental Sulfur
An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate. The process mineralogy analysis showed that the sulfur content reached 46.21%, and 81.97% of the sulfur existed as elemental sulfur which was the major mineral in the residue and …
Clean desulfurization of sulfur−rich tungsten concentrates …
In this study, we investigated the potential use and feasibility of reverse flotation to desulfurize sulfur−rich tungsten concentrates. Several important factors …
Flotation of coal and sulphur from South African …
gations have suggested the flotation of sulphur-bearing minerals, in particular pyrite, from coal with simultaneous depression of coal (Kawatra and Eisele, 2001; Laskowski, 2001). Sulphide flotation, in which bulk coal is left behind in the tailing, is sometimes referred to as reverse flotation. Direct sulphide flotation might be useful in ...
A Novel Sulfur-Containing Ionic Liquid Collector for the Reverse
Semantic Scholar extracted view of "A Novel Sulfur-Containing Ionic Liquid Collector for the Reverse Flotation Separation of Pyrrhotite from Magnetite" by Qinzhi Yuan et al.
Clean desulfurization of sulfur–rich tungsten concentrates by reverse …
Semantic Scholar extracted view of "Clean desulfurization of sulfur–rich tungsten concentrates by reverse flotation" by Lin Shangyong et al.
Synthesis and characterization of a novel collector for the
Semantic Scholar extracted view of "Synthesis and characterization of a novel collector for the desulfurization of fine high-sulfur bauxite via reverse flotation" by G. Cheng et al.
A novel sulfur-containing ionic liquid collector for the …
In this study, a novel collector of sulfur-containing ionic liquid (SCIL) was synthesized by the inorganic anion (isobutyl xanthic acid) and organic cation ( N …
Sulfur reduction in Sangan iron ore by flotation
For this purpose the effect of collector type, pH, collector concentration and stage dosing on reverse flotation of iron sulfide ore from magnetite ore was investigated.
1 Froth Flotation – Fundamental Principles
1 Froth Flotation – Fundamental Principles Froth flotation is a highly versatile method for physically separating particles based on ... elemental sulfur. Coal is a good example of a material that is typically naturally hydrophobic, because it is mostly composed of hydrocarbons. Chemical treatments to render a surface
Sulphur removal of iron ore tailings by flotation: Journal of
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 …
[PDF] Reverse Flotation | Semantic Scholar
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, …
Clean desulfurization of sulfur–rich tungsten concentrates by …
In summary, reverse flotation desulfurization can effectively remove sulfur from sulfur−rich concentrates, and its direct desulfurization through flotation renders it an economical desulfurization approach to treat high−sulfur feedstocks for smelters.
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.
Synchronous Desulfurization and Desilication of Low-Grade …
Reverse flotation. Desulfurization. Desilication. Introduction. Bauxite is the major feedstock for alumina production. The upgrading of low-grade and high-sulfur …
Minerals | Free Full-Text | Prediction of Sulfur Removal from …
The performance of the reverse flotation of iron ores is largely governed by the interactions between the operational variables, which are complex. The prediction of the amount of sulfur removal in the reverse flotation of iron ore concentrate is an important issue to enhance the process efficiency.
Clean desulfurization of sulfur–rich tungsten concentrates by reverse
The results obtained from batch flotation tests showed that the possibility of removing sulfur from sulfur−rich tungsten concentrates by reverse flotation. The desulfurization efficiency of reverse flotation was predominantly influenced by pH and reagent dosage.
Desulfurization in high-sulfur bauxite with a novel thioether
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 ...
A Novel Sulfur-Containing Ionic Liquid Collector for the Reverse …
The SCIL was used as a flotation collector for the first time to selectively separate pyrrhotite from magnetite by reverse flotation. Its flotation performance and adsorption mechanism on pyrrhotite or magnetite were investigated by microflotation tests, FTIR spectra, zeta potential and XPS analyses.
(PDF) DESULFURIZATION OF IRON ORE CONCENTRATE …
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.
(PDF) Froth flotation process and its application
The paper is about the froth flotation process and its application. It is a metallurgical process for the extraction of metals in a pure state from their ores: especially for sulfide ores.
Sulphur removal of iron ore tailings by flotation: Journal …
This study was the lab-scale testing of an integrated method consisting of froth flotation combined with gravity and magnetic separation. 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.
Synchronous Desulfurization and Desilication of Low
Request PDF | On Jan 1, 2019, Wencui Chai and others published Synchronous Desulfurization and Desilication of Low-Grade and High-Sulfur Bauxite by a Flotation Process | Find, read and cite all ...
(PDF) Selective Flotation of Elemental Sulfur from Pressure Acid
An efficient flotation process was developed to selectively recover elemental sulfur from a high-sulfur pressure acid leaching residue of zinc sulfide concentrate.
Prediction of Sulfur Removal from Iron Concentrate Using …
Prediction of Sulfur Removal from Iron Concentrate Using Column Flotation Froth Features: Comparison of k-Means Clustering, Regression, Backpropagation Neural Network, and Convolutional Neural Network
Reverse Flotation
Stonestreet and Franzidis [168] investigated reverse flotation for the beneficiation of ultrafine coal by employing a 3-1itre Leeds type laboratory flotation cell. To achieve a reverse flotation of coal particles, the surface of the gangue particles has to be treated hydrophobic and coal particles hydrophilic with flotation reagents.
A Novel Sulfur-Containing Ionic Liquid Collector for the Reverse
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 Al2O3 ...
Synchronous Desulfurization and Desilication of Low-Grade …
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 were studied using …
A novel method for desulfurization and purification of …
Semantic Scholar extracted view of "A novel method for desulfurization and purification of fluorite concentrate using acid leaching and reverse flotation of sulfide" by Hang Liu et al.
Impurity Removal in the Reverse Flotation of Iron Ore
Batch laboratory flotation studies conducted on Vale samples showed significantly reduced reagent costs and improved recovery of iron. In this work, the flotation behaviour of the different impurities in the Vale iron ore sample using reverse cationic and reverse anionic flotation processes is compared.