Metals | Free Full-Text | The Study of Carbon Recovery from
A large amount of carbon dust is generated in the process of aluminum smelting by molten salt electrolysis. The carbon dust is solid hazardous waste but contains a large quantity of recyclable components such as carbon and fluoride. How to recycle carbon dust more effectively is a challenge in the aluminum electrolysis field. In this …
Enhancing flotation removal of unburned carbon from fly ash …
The effect of diesel emulsification using sodium petroleum sulfonate on carbon flotation from fly ash. Waste Manage (2019) L.u. Yang et al. On the utilization of waste fried oil as flotation collector to remove carbon from coal fly ash. ... The result of surfactants on froth flotation of unburned carbon from coal fly ash. Fuel, Volume 190, …
Removal of unburned carbon from fly ash using enhanced …
The present study had investigated the removal of unburned carbon from fly ash using enhanced gravity separation under different operation parameters such as …
Studies on carbon flotation from fly ash
1. Introduction. It has been estimated that 750 million tons of coal fly ash is generated on a global basis annually, and the global fly ash utilization figure is estimated to be 25% [1]. Carbon content in fly ash is within the range of 0.1–25% [2], [3]. Fly ash is mainly used as a raw material for adsorbents, ceramics, glasses, geo-polymers ...
Studies on carbon flotation from fly ash | Request PDF
The separation of carbon from fly ash significantly improves the potential end-us of combustion byproducts. Froth flotation is the most effective separation technique for ultrafine material ...
Investigation on mechanism of intensifying coal fly ash froth flotation
DOI: 10.1016/J.FUEL.2019.06.009 Corpus ID: 197314652; Investigation on mechanism of intensifying coal fly ash froth flotation by pretreatment of non-ionic surfactant @article{Xu2019InvestigationOM, title={Investigation on mechanism of intensifying coal fly ash froth flotation by pretreatment of non-ionic surfactant}, author={Ming Xu and …
Characterization of Unburnt Carbon Recovered from Fly …
Flotation was carried out using Denver flotation cell with constant water level arrangement and froth scrapping facility. Characterization of the recovered unbumt carbon from fly …
Enhancing flotation removal of unburned carbon from fly ash …
In this paper, the use of froth flotation to remove the unburned carbon from fly ash is described. Three different fly ashes were studied that had loss-on-ignition (LOI) values of 6.79, 6.90, and ...
Removal of carbon constituents from hospital solid waste …
After weathering of MSWI fly ash, more oxygen-containing functional groups on the unburned carbon surface easily came into being and accordingly made them more difficult to remove by froth flotation (Huang et al., 2003b). In addition, powder activated carbon in HSWI fly ash is naturally hydrophobic due to their hydrocarbon nature and this ...
Separation of unburned carbon from fly ash using a concurrent flotation
The concurrent flotation column is a combination of a static mixer, a froth separator for fly ash cleaning and a bubble generator to aid bubble formation. The objective was to improve throughput and to reduce energy and operation costs of unburned carbon removal by accelerating flotation kinetics (rate) and increasing the process efficiency ...
(PDF) Unburned Carbon from Fly Ash for Mercury …
The unburned carbons have been efficiently separated from clean ash, which is a value-added product for the concrete industry, with the separation technologies such …
On the utilization of waste fried oil as flotation collector to remove
The removal efficiency for the unburned carbon in fly ash when using waste fried oil as collector was also estimated through froth flotation tests. And the interaction mechanism between waste fried oil and fly ash was investigated using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy analysis, scanning electron ...
The result of surfactants on froth flotation of unburned carbon …
The efficiency of the flotation of the fine unburned carbon from coal fly ash (CFA) is closely dependent on the dispersion of the collector on the carbon surface. In this work, we carried out the ...
Separation of carbon from fly ash using froth flotation
This method reduced the carbon content of fly ash from an initial level of 25.9% in one case and 16.5% in another case to a final level of 1-2% or less in the tailings while at the same time recovering 95% or more of the carbon in the floated material or concentrate. In most cases from 60 to 75% of the ash was rejected in the tailings.
Effects of carrier particles on flotation removal of unburned …
Roles of carrier particles in froth properties of fly ash flotation was highlighted. •. Interaction between carrier particles and UC and ash particles was …
Effects of carrier particles on flotation removal of unburned carbon …
The flotation results indicated that calcium chloride reduced the performance of unburned carbon removal from the coal fly ash, whereas sodium chloride increased froth stability thereby improving ...
The result of surfactants on froth flotation of unburned carbon …
DOI: 10.1016/J.FUEL.2016.11.032 Corpus ID: 99378386; The result of surfactants on froth flotation of unburned carbon from coal fly ash @article{Zhou2017TheRO, title={The result of surfactants on froth flotation of unburned carbon from coal fly ash}, author={Feng-shan Zhou and Chunjie Yan and Hongquan …
Effect of Prestirring Time on Carbon Removal from Coal Fly …
Coal fly ash (CFA) is one of the industrial byproducts of burning coal for energy production and has unburned carbon, which negatively affects its full potential …
(PDF) Effect of frothers on removal of unburned …
Meanwhile, the LOI of flotation tailing was reduced to 1.32% and the carbon recovery was 84.79%. Froth flotation could recover residual carbon and remove chlorine from EBFS simultaneously, a …
Separation of unburned carbon from coal fly ash: A review
Separation of unburned carbon from fly ash is an efficient way to achieve a higher efficiency in the utilization of waste fly ash and greater economic and environmental benefits. This review highlights current methods for separating unburned carbon from fly ash, such as sieving, gravity separation, electrostatic separation, froth …
Separation of Carbon from Fly Ash Using Froth Flotation
The tailings from the first stage were recleaned in the second stage. This method reduced the carbon content of fly ash from an initial level of 25.9% in one case and 16.5% in another case to a final level of 1–2% or less in the tailings while at the same time recovering 95% or more of the carbon in the floated material or concentrate.
Application of compound reagent H511 in the flotation …
This article aims to study the effect of flotation reagent H511 on the removal of unburned carbon (UC) from fly ash. The gas chromatography/mass spectrometry revealed that the main components in H511 were cyclohexanol, d-limonene, longifolene, and 2-cyclohexylidene-cyclohexanone.It is found that the H511 could reacted with the …
Removal of carbon constituents from hospital solid waste incinerator
After weathering of MSWI fly ash, more oxygen-containing functional groups on the unburned carbon surface easily came into being and accordingly made them more difficult to remove by froth flotation (Huang et al., 2003b). In addition, powder activated carbon in HSWI fly ash is naturally hydrophobic due to their hydrocarbon nature and …
Use of froth flotation to remove unburned carbon from fly ash
For each of the three fly ashes, froth flotation reduced the LOI of the ash to less than 2%, which is well below the ASTM specification of no more than 6.0% LOI for …
Effect of frothers on removal of unburned carbon from coal …
ABSTRACT The effect of single frothers and their blends on bubble size, froth stability, and unburned carbon (UC) flotation performance was studied. Methyl isobutyl carbinol that produces smaller bubbles is efficient in floating ultrafine particles and producing concentrate. DF-250 that gives higher froth stability is effective for recovering …
Application of compound reagent H511 in the flotation …
In this paper, the use of froth flotation to remove the unburned carbon from fly ash is described. Three different fly ashes were studied that had loss-on-ignition (LOI) values of 6.79, 6.90, and ...
Effect of Prestirring Time on Carbon Removal from Coal Fly Ash …
Sepn. of unburned carbon from fly ash is an efficient way to achieve a higher efficiency in the utilization of waste fly ash and greater economic and environmental benefits. This review highlights current methods for sepg. unburned carbon from fly ash, such as sieving, gravity sepn., electrostatic sepn., froth flotation, and oil agglomeration.
Effect of frothers on removal of unburned carbon from coal-fired …
The presence of DF-250 in the blend increases bubble size and significantly enhances froth stability, and hence the optimal flotation performance is achieved with 75% DF-250. It indicates that the frother giving high froth stability is better in UC flotation due to the little effect of UC on froth stability.
Magnetite and Carbon Extraction from Coal Fly Ash Using …
The chemical composition (wt %) of the unburned carbon concentrate and non-magnetic fraction after flotation kinetics tests for 40-71 µm particle size of CFA. Figures - uploaded by Dmitry Valeev ...
Effect of Prestirring Time on Carbon Removal from Coal Fly Ash …
Unburned carbon can be segregated from CFA for beneficial reuse by sieving, 7 gravity separation, 8 electrostatic separation, 9 froth flotation, 10 acid digestion, and sink-float technique (density separation). 11 At present, froth flotation is commonly used as a separation technique in the concentrating and coal beneficiation industries ...