Study on flotation characteristics of oxidised Indian high ash …
In case of column flotation, the product ash could be reduced further to 26.6% from the same feed coal with 66.5% yield. Discover the world's research 25+ million members
Transfer learning using small-sized dataset for concentrate ash …
ABSTRACT Real-time and accurate acquisition of ash content is crucial for coal flotation monitoring but existing modeling approaches have been hindered from a large dataset labeled by the target task. The method proposed in this paper relies on a transfer learning approach that is able to exploit the knowledge of a source domain …
On the utilization of waste fried oil as flotation collector to remove
SEM + EDAX images of the raw coal fly ash (a), flotation concentrate (b), flotation tailing (c). 4. Conclusions. The utilization of waste fried oil as flotation collector in fly ash flotation was investigated in this study. The treatment of waste fried oil improved the contact angle of coal fly ash, and the maximum value of 49.33° was reached ...
Magnetite and Carbon Extraction from Coal Fly Ash Using …
In this study, enrichment methods for coal fly ash (CFA) from Omsk thermal power station No. 4 (TPS-4) were investigated. The magnetite and unburned carbon concentrates were obtained by magnetic separation and flotation methods. The wet magnetic separation used in the study increased the magnetite content in the magnetic …
Ash determination of coal flotation concentrate by …
Abstract. Flotation is an important separation method for coal preparation, where ash content is critical to coal product quality. However, the absence of fast and …
(PDF) Cleaning high ash coal waste from coking coal via froth flotation …
that the ash content in the coal gangue waste, e.g., fly ash, is. typically high, which ranges between 60% and 90% (Xing. et al. 2019). To clean the unburned carbon from the fly ash, Denver f ...
Froth image feature engineering-based prediction method …
The feature engineering of coal flotation froth image in this paper can make a good prediction of the coal flotation concentrate ash content. Furthermore, the results can be used as the theoretical basis for the intelligent construction of flotation. Previous article in issue; Next article in issue; Keywords.
Comparison of flotation performances of low-rank coal with lower ash
DOI: 10.1016/j.powtec.2020.07.058 Corpus ID: 225267437; Comparison of flotation performances of low-rank coal with lower ash content using air and oily bubbles @article{Wang2020ComparisonOF, title={Comparison of flotation performances of low-rank coal with lower ash content using air and oily bubbles}, author={Shiwei Wang and …
Kinetics of Flotational Enrichment for Coal with Elevated
The full factorial experiment indicates that, in the flotation of coal with an initial ash content of 20.8%, the maximum concentrate yield (90.38%) is observed when the reagent consumption is 3.0 kg/t; pulp density is 80 kg/m 3, and the flotation time is 6 min, if the content of fine slurry in the pulp is 30%. However, in those conditions, the ...
Improving flotation decarbonization efficiency of coal …
The high unburned carbon content of solid waste coal gasification fly ash is the main reason that it cannot be used in the construction material industry, which leads to serious waste of resources and environmental pollution. Currently, decarburization flotation has been a dominating method for coal gasification fly ash resource utilization.
Enhancing flotation removal of unburned carbon from fly ash by coal …
DOI: 10.1016/j.fuel.2022.126023 Corpus ID: 252485388; Enhancing flotation removal of unburned carbon from fly ash by coal tar-based collector: Experiment and simulation @article{ZhengEnhancingFR, title={Enhancing flotation removal of unburned carbon from fly ash by coal tar-based collector: Experiment and simulation}, author={Kang Zheng …
Challenges of using froth features to predict clean …
In coal flotation, clean coal ash content is controlled by adjusting different operating parameters to meet the requirements for products. However, real-time control …
Mechanical Properties and Hydration Mechanism of Coal Flotation …
The coal flotation tailings originate from the fine-grained tailings left after the sorting of raw coal in the coal production process, with kaolin being the main component. It contains a large amount of active Si, Al, and other volcanic ash materials that can react with cement to promote the hydration process of the filling material and ...
Prediction of Clean Coal Ash Content in Coal …
Processes | Free Full-Text | Prediction of Clean Coal Ash Content in Coal Flotation through a Convergent Model Unifying Deep Learning and Likelihood Function, …
Ash Removal from a Sample Coal by Flotation Using …
Ash Removal from a Sample Coal by Flotation Using Rhamnolipid Biosurfactants. Synthetic chemicals from petroleum origins are now coming to a turning point on their hazardous problems to living organisms. In this regard, biosurfactants are well acknowledged as potential constitute for their chemical counter-part due to structural …
Improving the technology of extracting coal concentrate from fly ash
During the flotation of fly ash, the best results were obtained on the EFM ejector type flotation machine, the yield of the product was 18.6 % with an ash content of 25.1 %, compared to the ...
Deep learning-based ash content prediction of coal flotation
Coal flotation is a critical separation technology in fine coal cleaning [1], [2]. Ash content, as the important indicator of coal flotation, is obtained by sampling, filtrating, drying, sample preparation, and burning. [3], [4]. The result of concentrate ash content determines the efficiency of the coal flotation process.
Improving Coal Flotation by Introducing a Modifier
To convert coal with high mineral content to concentrate whose ash content is acceptable for coke production, we must develop selective reagents. In coal flotation, we use a petrochemical product as the modifier: Sinterol, with the general formula H 19 C 9 –C 6 H 4 –O (C 2 H 4 O) n COONa, where n = 10–12.
Comparison of flotation performances of low-rank coal with lower ash
In the presence of coal depressant (dextrin, 0.5kg/t), the ash content of LS-26 coal was reduced from 34.7% to 16.5% at a clean coal yield of 55%, whereas the conventional (forward) flotation with ...
Froth image feature engineering-based prediction method …
The focus of this study was to investigate the feature engineering of the froth image for the accurate prediction of coal flotation concentrate ash content. From the perspective of image processing, the features of morphoscopic (3 features), statistical (gray levels histogram (5 features), gray level co-occurrence matrix (24 features ...
Prediction of the Ash Content of Flotation Concentrate …
The performance of the models was compared by the hyper-parameters in Table 1 (section 2.3). As a whole, the concentrate ash content classification performance of coal flotation obtained by the ...
A Study on the Effects of Ultrasonic Irradiation as
Ghadyani et al. [60] studied the flotation kinetics of high-ash coal obtained from Tabas coal mine of Iran containing feed ash of 50.29% under low-frequency ultrasound (20 kHz). Under the ...
Transfer learning using small-sized dataset for concentrate ash …
Real-time and accurate acquisition of ash content is crucial for coal flotation monitoring but existing modeling approaches have been hindered from a large dataset labeled by the target task. The method proposed in this paper relies on a transfer learning approach that is able to exploit the knowledge of a source domain (ImageNet …
(PDF) Ash Detection of Coal Slime Flotation Tailings Based …
The detection of ash content in coal slime flotation tailings using deep learning can be hindered by various factors such as , impurities, and changing ligh ting conditions that disrupt the ...
COLUMN FLOTATION AS A METHOD FOR CLEANING …
yield and coal quality that could be obtained. The operation of a two-inch diameter flotation column for the cleaning of high ash bituminous coal was observed. Empirical models were developed which can predict yield of coal and percent of …
DESIGN AND PERFORMANCE ASPECTS OF COAL …
In coal flotation, fine bubbles also improve separation as they intensify the difference in the kinetics of the coal from non-coal particles, thus allowing concentrates with lower ash content to be produced without loss in yield. (a) (b) Figure 2: Rate constant as a function of particles size, for three bubble sizes at
Predicting the ash content in coal flotation …
The EfficientNetV2-L network achieves the highest classification accuracy (99%) after fine-tuning. The results indicate that the CNNs are effective in predicting the …
Enhancing flotation removal of unburned carbon from fly ash by coal …
The flotation processing of both fly ash and low-rank coal present similar challenges, and fly ash flotation is more challenging relatively. Therefore, this study used the CTB collector instead of a conventional collector (kerosene or diesel) to maximize fly ash resource utilization.
Separation of unburned carbon from coal fly ash: A review
A column flotation system with a handling capacity of 110 tons of coal fly ash (dry basis) per hour was used. Tailings ash with an LOI of 3.08%, a removal rate of unburned carbon of 80.41%, and a calorific value of 3534 cal g −1 for the unburned carbon products was obtained.
Development of magnetic flotation hybrid separation …
1. Introduction. Coal is regarded as one of the most important non-renewable energy sources. It plays an essential role in power generation, supplying more than 40% of electricity for the world (Xia et al., 2015, Yassin et al., 2022).Before coal burning, a considerable amount of the ash-forming mineral compounds such as carbonates, …
