DOI: 10.1016/J.TCA.2006.10.026 Corpus ID: 96839020; Predicting coal ash fusion temperature based on its chemical composition using ACO-BP neural network @article{Liu2007PredictingCA, title={Predicting coal ash fusion temperature based on its chemical composition using ACO-BP neural network}, author={Yan-Peng Liu and Ming …

The temperature at which coal ash melts has a significant impact on the operation of a coal-fired boiler. The coal ash fusion temperature (AFT) is determined by its chemical composition, although the relationship between the two varies. Therefore, it is important to have mathematical models that can reliably predict the coal AFTs when designing coal …

Coal ash fusion temperatures--new characterization techniques, and implications for slagging and fouling 349 Fig. 1. For sample EN3, as seen in Fig. 4, the IDT is within a temperature region without substantial change in measured shrinkage. The poor reproducibility of the IDT procedure is therefore expected.

Due to the interaction of minerals in different coals, the ash fusion temperature (AFT) of the blending coal ash was also varied under the blending coal combustion [29]. Qiu et al. [30]

For coal ash, the fouling tendency (F u) decreased because of a significant amount of SiO 2 and Al 2 O 3 in ash, which increased the fusion temperature of ash (T Al2O3 = 2040 °C, T SiO2 = 1600 °C). It was confirmed that an additional amount of Al 2 O 3 could decrease the corrosion risk during the combustion process of fuel [25].

DOI: 10.1016/J.FUPROC.2019.03.005 Corpus ID: 132908230; Investigation on improve ash fusion temperature (AFT) of low-AFT coal by biomass addition @article{Li2019InvestigationOI, title={Investigation on improve ash fusion temperature (AFT) of low-AFT coal by biomass addition}, author={Fenghai Li and Bing Yu and Guixiu …

Ash fusion temperature (AFT) is an important index for coal gasification. A blend of fluxing agent with coal can decrease the AFT to meet the requirements of specific gasification process. Effect of alkaline oxide and silica alumina ratio on decreasing AFT is focused in this study. Simulation ash was used to investigate the effect of alkaline oxide …

With growing energy demand and environmental protection, more attentions have been paid to coal gasification [1, 2].Although shortcoming exists, ash fusion characteristic of coal is still considered as an important index for gasifier design and operating condition determination [].The ash fusion temperature (AFT) is mainly …

Coal AN has low ash fusion temperature due to its high Fe 2 O 3 in ash (Liu et al., 2013). The rich Fe element in coal improve the molten phase formation of fluxing Si-Al system (Wang et al., 2021). With the addition of woody biomass, the DT was …

Based on classification of silica and alumina content and silica alumina ratio in coal ash, optimized prediction models of coal ash melting point and viscosity related to ash components were built. Their relationship in a wide range of ash components was also discussed. An ash fusion temperature prediction model based on liquidus …

The transformation of refractory silica-aluminates in coal ash and K-silicates with an ultra-low melting point in biomass ash into leucite played a crucial role in alleviating slag blockage and slagging issues. ... 4- tetrahedral skeleton caused a shift of the ash fusion interval to the low-temperature region and accelerated the ash melting ...

Values of B/A ≈ 1 are most interesting for achieving low ash fusion temperatures for applications such as entrained flow/fixed bed gasification with liquid slag outlet.This region has been displayed in a very small area of the overall diagram, when plotting a wide range of B/A ratios (Fig. 1, left).Consequently, a transformation of the B/A …

The modifications in the low ash fusion temperature (AFT) of Xiangyang coal (XY) were investigated by blending it with three high AFT coals [Jincheng coal (JC), Sunjiahao coal (SJH), and Shajuzi coal (SJZ)], respectively. These three coals all improved XY AFT effectively. With the JC mass ratio varying from 0 to 50%, the AFT of XY/JC …

One of the first is the Seggiani model [37] successfully dedicated to predicting AFT (Ash Fusion Temperature) for ash from coal combustion. The model was built based on multiple regression, based on data containing 433 samples of coal ash and some biomass ash. This model calculates

The hemisphere temperature increases linearly with the deformation temperature ðR ¼ 0:96Þ; in the Korça region, the correlation coefficient is R ¼ 0:98: These findings reconfirm that the three fusion temperatures are related to each other in a straightforward manner: the deformation temperature represents the starting point for the coal ...

Abstract To produce coal with a high ash fusion temperature (AFT) as the raw material for gasification, the addition of fluxes is often adopted. In this paper, the ash chemistry of coals from the Huainan–Huaibei mining area (Zhuji and Taoyuan) was analysed to investigate the mechanisms of the composition modulation and, …

DOI: 10.1016/S0016-2361(99)00031-9 Corpus ID: 93461507; Empirical correlations of the ash fusion temperatures and temperature of critical viscosity for coal and biomass ashes

The ash deposit tendency is known by analyzing the composition and ash fusion temperature of coal, determining the ash type and calculating of the fouling and slagging. The results showed that the ...

Four characteristic temperatures are used to quantitatively characterize the melting characteristics and slagging performance of coal ash: softening temperature (ST), deformation temperature (DT), hemispherical …

DOI: 10.1016/j.wasman.2023.12.011 Corpus ID: 266231037; Effecting mechanisms of iron-rich sludge on ash fusion characteristics of coal with high ash fusion temperature under reducing atmosphere.

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 …

Our AF700 Ash Fusion Determinator increases your laboratory throughput by automatically determining the ash fusibility temperatures (IT, ST, HT, and FT). ... LECO's AF700 is an ash fusibility determinator that automatically monitors ash cone deformation temperatures in coal ash and coke ash. Prepared ash cones are mounted on a ceramic tray ...

Understanding the behavior of coal ash at high temperature is critical in determining ... Ash fusion temperatures are determined by heating a prepared sample of molded coal in a high-temperature furnace to temperatures exceeding 1,000 oC in both reducing and oxidizing conditions. The cone or pyramid of molded ash is monitored as the temperature

A broad set of ashes originating from national and international sources of hard coal, brown coal, and biomass is investigated under different ashing temperatures (815 …

The ash fusion temperatures (AFTs) of coal mineral matter at high temperature are important parameters for all gasifiers. Experiments have been conducted in which mixtures of selected coal ashes and SiO2, Al2O3, CaO, Fe2O3, and MgO were subjected to the standard test for ash fusibility. The computer software package …

to the relationship between coal ash fusion temperature and chemical composition of ashes. 0.929, the correlation coefficient, was obtained by using the linear least square method. And an improved ...

The property that governs the behavior of ash in various coal-utilizing pro-cesses is termed ash fusion temperature (AFT). Its analysis consists of the determination of four …

High aluminum coal (HAC, Al2O3 in its ash content ranges 38–51%) is abundant and plays an important role in energy and chemical product in China. The ash fusion characteristics of HAC and its modification behaviors by coal blending or flux were investigated by ash fusion temperature (AFT) analyzer, X-ray fluorescence …

DOI: 10.1016/S0016-2361(02)00194-1 Corpus ID: 94411891; Correlation between ash fusion temperatures and chemical composition in Albanian coal ashes @article{Lolja2002CorrelationBA, title={Correlation between ash fusion temperatures and chemical composition in Albanian coal ashes}, author={Saimir A. Lolja and Hajri Haxhi …

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