Coal ASH fusion temperature model based on SVM …

2012-7-5 · Abstract: A coal ash fusion temperature model is constructed based on support vector machine (SVM). The compositions of coal ash are employed as the inputs and the ash fusion temperature is the output. A series of improvement is made on basic ant colony optimization (ACO) and it is used to optimize the parameters of the SVM model.

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ash fusion temperature of coal bangladesh

Oct 07, 2019· Ash fusion, also called fusibility, is a test to determine how the ash residue remaining from combustion of a coal will react in a furnace or boiler. In this test, coal ash is put …

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Study on the ash fusion temperatures of coal and sewage …

2010-7-1 · From Table 2, it is clear that the main oxides in coal ashes are SiO 2, CaO, Al 2 O 3, Fe 2 O 3, SO 3.Al 2 O 3 and P 2 O 5 in sewage sludge ashes are much more than those in …

Prediction of Chinese coal ash fusion temperatures in Ar …

2009-4-15 · The ash fusion temperatures (AFTs) of 21 typical Chinese coal ash samples and 60 synthetic ash samples were measured in Ar and H{sub 2} atmospheres. The computer software package FactSage was used to calculate the temperatures corresponding to different proportions of the liquid phase and predict the phase equilibria of synthetic ash samples.

Coal Ash Fusion Temperatures

The well-documented shortcomings of the standard technique for estimating the fusion temperature of coal ash are its subjective nature and poor accuracy. Alternative …

Prediction of Coal Ash Fusion Temperature by Least …

2010-4-23 · Coal ash fusion temperature (AFT) is one important parameter for coal-fired boiler design and evaluation in a power plant. The relationship between coal AFT and the chemical composition of coal ash is rather complex in nature and makes the modeling of AFT difficult. In this work, a least-squares support vector machine (LS-SVM) model, which was based on a …

Ash Fusion Temperatures

2011-8-22 · Ash fusion temperatures give an indication of the softening and melting behavior of fuel ash. These temperatures are widely cited in fuel specifications for boilers despite a relatively poor record of correlating with slagging or fouling behavior. ... Gascoigne Wood Coal: 0: 0: 0: 0: 0: 0: 0: 0: Hanna Basin: 1196.388889: 1229.166667: 1246. ...

Prediction of coal ash fusion temperatures using …

2018-9-1 · Accordingly, this study presents computational intelligence (CI) based nonlinear models to predict the four AFTs using the oxide composition of the coal ash as the model input. The CI methods used ...

Ash fusion temperature under reducing and …

Numerous studies show that ash fusion characteristics and slag viscosity are closely related to the compositions of coal ash (Chen et al. 2017;Hsieh, Kwong, Bennett 2016;Nesbitt et al. 2011 ...

Coal ash fusion temperatures—New characterization …

1998-1-1 · Amount of ash used: HRL ~ 0.3 g, ACIRL~0.1 g, CSIRO-35 mg Ash compaction: CSIRO, loose ash, others use pellets with dextrin Initial temperatures: ACIRL, 1000; others …

Ash fusion temperatures and the transformations of coal …

1998-7-1 · Shrinkage measurements are frequently used in metallurgy and ceramic science to study the physical properties at high temperatures. Many researchers have studied electrical …

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Relationship Between Ash Fusion Temperatures and Coal …

determination of the ash fusion temperatures. The calculated values were compared with chemical compositions. The results showed that Soma-Yatagan-Yeniköy coal fly ash holds a tendency of high capacity slagging. Kemerköy coal ash samples have less slagging tendency compared to the others. This is most probably due to their high acidic alkali ...

ash fusion temperature of coal bangladesh

reasons for clinker formation in boiler traiteurniels. reasons for clinker formation in bagasse fired boiler Impact of Blended Coal Firing on the Power Plant Ash Fusion Temperature Clinker formation in the boiler Studies on the blending of UK power grade coals indies that the blend has shown more slagging propensity than componet coals 1 10 Slagging Nonslagging Reason is …

Study on fusion characteristics of biomass ash

The ash fusion characteristics (AFC) of Capsicum stalks ashes, cotton stalks ashes and wheat stalks ashes that all prepared by ashing at 400 degrees C, 600 degrees C and 815 degrees C are consistent after 860 degrees C, 990 degrees C and 840 degrees C, respectively in the ash fusion temperature test …

Ash fusion temperatures and the transformations of coal …

1996-12-31 · The U.S. Department of Energy''s Office of Scientific and Technical Information

:biomass Baodian coal; blending ash; ash fusion temperature viscosity-temperature characteristic : 、、3,310%。

Relationship between coal ash composition and ash fusion …

2013-3-1 · 1. Introduction. The coal ash fusion temperature (AFT) is an important parameter on coal ash fouling and slagging properties. It determines the behavior of coal ash in the …

Coal ASH fusion temperature model based on SVM …

2012-7-5 · A coal ash fusion temperature model is constructed based on support vector machine(SVM). The compositions of coal ash are employed as the inputs and the ash fusion temperature is the output. A series of improvement is made on basic ant colony optimization(ACO) and it is used to optimize the parameters of the SVM model. The coal ash …

Prediction of coal ash fusion temperatures using …

2018-9-19 · The ash fusion temperatures (AFTs) signify the temperature range over which the ash deposits are formed on the heat absorbing surfaces of the process equipment. Thus, for …

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Study on the Ash Fusion Temperature of Blended Coals …

Abstract: In operation of coal-fired boilers in power plant,blended coals are wildly used as fuel instead of designed coal the course of using blended coals,the ash fusion temperature of the blended coals is usually low will cause slagging in the boilers.Slagging will bother the operators and plague the security and economy in operation of the boilers.So it''s important to take ...

Ash fusion temperature regulation mechanism of …

2019-7-29 · In industrial practice, ash-related problems during low AFT coal gasification in EF gasifiers may be avoided by setting the ash FT to be 1340–1400 °C. Thus, the appropriate blending ratios of JC, SJH, and SJZ were 40–50%, 30–40%, and 20–40%, respectively. Fig. 1 Variations in AFTs and B / A of blended coals a JC; b SJH; and c SJZ Full size image

Ash fusion temperature and crystal composition of multi …

The equipment of ash fusion temperature was used to measure the ash fusion temperatures of the oxide components composed of SiO2, Al2O3, Fe2O3, MgO and CaO with different proportions. Five variables composed of Si/Al, Si + Al, Fe2O3, MgO and CaO were selected to verify the effect of the change on the coal ash fusing characteristics and the ...

Ash fusion temperature under reducing and …

Ash fusion temperatures (AFTs) and X-ray diffraction (XRD) combined with in-situ methods of thermomechanical analysis (TMA) and high-temperature scanning electron microscopy (HT-SEM) are used to ...

Ash Fusion Temperature Of Coal Bangladesh In Vietnam

Ash Fusion. An SGS ash fusion test gives you an indication of the softening and melting behaviour of coal ash at high temperatures within the boiler. Critical ash softening …

Ash Fusion, Coal Analysis, Kentucky Geological Survey, …

2019-10-7 · Ash fusion, also called fusibility, is a test to determine how the ash residue remaining from combustion of a coal will react in a furnace or boiler. In this test, coal ash is put into conical molds as specified in ASTM method D1857-04 guidelines and procedures (American Society for Testing and Materials, 2013, p. 431–435).

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Ash Fusion Temperature

The grades of coal refer to the amount of mineral matter that is present in the coal and are a measure of coal quality. Sulfur content, ash fusion temperatures (i.e., the measure of the behavior of ash at high temperatures), and quantity of trace elements in coal are also used to grade …

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Research Article Multivariable Regression and Adaptive …

2019-7-31 · model coal ash fusion temperatures based on the chemical compositions of the ashes. Data on typical Chinese coal ash samples were used for training and testing. e results showed that the ACO-BP neural network can obtain better performance than empirical formulas and BP neural networks [ ]. e aim of this research is to provide new correlations

What is the effect of ash fusion temperature of …

Ash fusion temperatures give an indication of the softening and melting behavior of fuel ash. These temperatures are widely cited in fuel specifications for boilers despite a relatively poor ...

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What is ash melting temperature? – Curvesandchaos

2022-9-5 · The CaO content in the coal ash, which is a basic oxide with a melting point of 2610°C is usually formed as a result of the decomposition of CaCO3 (calcite) and CaSO4 (anhydrite), etc., which exist in low-rank coals (Zhang, 2014). Does ash Increase temperature? The ash fusion temperatures of different biomass ashes are shown in Table 4.

Ash fusion and viscosity behavior of coal ash with high …

Jinjitan coal and sand were respectively chosen as raw material and additive. Under the different proportion of additive,ash fusion and viscosity behavior of coal ash with high contents of Fe and Ca were studied. X-ray diffraction( XRD), high-temperature stage microscope( HTSM) and scanning electron microscopy-energy dispersive spectrometry( SEM-EDS) were applied to …