The results showed that the mixed gangue samples of waste coal roadway gangue and rock gangue had low C content and low calorific value, which could not be used directly as power generation fuel.

Request PDF | On Jan 1, 2023, Hanlin Zhang and others published Preheating Pyrolysis-Char Combustion Characteristics and Kinetic Analysis of Ultra-Low Calorific Value Coal Gangue ...

Zhang, H. et al. Preheating pyrolysis-char combustion characteristics and kinetic analysis of ultra-low calorific value coal gangue: Thermogravimetric study. Appl. Therm. Eng. 229, 120583–120591 ...

The results show that the equipment has advantages and stability for the disposal of ultra-low calorific value coal gangue, and the removal rate of combustible components can reach 88.47 % on average in five random tests. According to the thermogravimetric analysis, the preheating pyrolysis process has three main weight loss …

Coal gangue (CG), which accounts for about 10–20 % of coal output, is a kind of solid waste generated during the coal mining and washing processes. According to Fig. 2, the annual output of CG in China fluctuates between 600–800 million tons, with a utilization rate hovering around 70 %.

Background: The gangue content in coal seriously affects the calorific value produced by its combustion. In practical applications, gangue in coal needs to be completely separated. The pseudo-dual-energy X-ray method does not have high sorting accuracy.

Abstract: The calorific value of coal gangue is a critical index for coal waste recycling and the energy industry. To establish an accurate and efficient calorific value …

Coal plays an important role in the energy sector and has driven social development in China for decades. However, a large amount of slime water and coal gangue are inevitably produced in the process of coal mining and washing, resulting in serious problems regarding environmental pollution and resources waste, including …

The calorific value of coal gangue is a critical index for coal waste recycling and the energy industry. To establish an accurate and efficient calorific value forecasting model, a method based on ...

The carbon content of coal gangue should be considered in the energy utilization mode; the combustion of low-carbon coal gangue causes low calorific value and thermal efficiency. Relevant research shows that coal gangue with a carbon content of above 20% is generally recommended for fuel [56, 57].

Coal gangue separation is the process of separating coal and gangue that are mixed together during coal mining. The presence of gangue can significantly affect the combustion of coal, reduce its calorific value, and emit harmful gases, causing environmental pollution [11, 20, 22]To achieve high-quality coal gangue separation, …

Traditional Coal Gangue Separation Process and Equipment. Water washing and dry coal preparation are the main parts of coal preparation. Spiral separation, jigging, heavy medium separation, and other processes are water washing processes, which have the advantages of mature technology, high separation accuracy, and large processing …

For example, a coal with a calorific value of 14,000 Btu/lb has a metric calorific value of 32.56 MJ/kg. Find more information about this analysis at KGS Laboratory Services. If you have specific questions …

The mineral characteristics of coal gangue from Liupanshui area in Guizhou Province were studied.The results showed that the mixed gangue samples of waste coal roadway gangue and rock gangue had low C content and low calorific value.which could not be used directly as power generation fuel.However,Al enrichment and high contents of Fe and …

Co-combustion can reduce the activation energy of coal gangue during the initial and end stages. Therefore, co-combustion is helpful to improve the problems of low calorific value and refractory …

A novel hybrid analysis was presented to predict the CV of coal, and RF model provided a better regression, better fit and better robustness on the testing set than the other three models when the performance indicators and the number of input variables were considered. ABSTRACT As one of the most important indicators of coal, calorific …

table i net calorific values of energy products gj/ton hard coal 2011 2012 2013 2014

the calorific values of four types of product coals, namely, clean coal, middling coal, slime and gangue, from the daily production of the Duanshi coal preparation plant, and compared with the assay results. ... copy was used to predict the low calori c value of coal samples, which showed excellent accuracy. Begum et al.25 rst improved

The calorific value of coal gangue is a critical index for coal waste recycling and the energy industry. To establish an accurate and efficient calorific value forecasting model, a method based on hybrid kernel function–support vector regression and genetic algorithms is presented in this paper. Firstly, key features of coal gangue …

In order to solve the problems of inconvenience and high cost of coal gangue calorific value measurement, the machine learning algorithm is adopted and applied to the prediction of practical engineering. Firstly, the industrial analysis components and calorific value of coal gangue in Xinjiang are obtained by experiment following the …

The system is more economical to treat ultra-low calorific value coal gangue. The recommended pyrolysis temperature is about 600 ℃ for industry process. …

Maixi Lu, Zhou C (2009) Coal calorific value prediction with linear regression and artificial neural network. Coal Sci Technol 37:117–120. Google Scholar Jiang W, Hongqi W, Qu T (2011) Prediction of the calorific value for coal based on the SVM with parameters optimized by genetic algorithm. Thermal Power Gener 40:14–19

DOI: 10.1016/j.seta.2023.103491 Corpus ID: 263320729; Process design and optimization on self-sustaining pyrolysis and carbonization of ultra-low calorific value coal gangue

A new disposal process for coal gangue of ultra-low calorific value is developed. • A 300,000 tons/year demostration project is eatablished. • Preheating pyrolysis-char combustion of coal gangue is studied by TGA.. 800-900℃ is recommended for the oxidation of coal gangue char.

The gross calorific value (GCV) of coal is important in both the direct use and conversion into other fuel forms of coals. The measurement of GCV usually requires sophisticated bomb calorimetric ...

Coal gangue and aluminum ash emerge as quintessential constituents within the ambit of coal-derived solid waste and industrial residue, respectively. Leveraging coal gangue as a primary substrate and aluminum ash as an adjunct aluminum source, molecular sieves can be synthesized through hydrothermal means. By modulating the …

In order to effectively utilize coal gangue and its calorific value (4180–12,540 kJ/kg), coal gangue was converted into energy-saved cement by activating at 800 °C with an integrated thermal and chemical activation method.Microanalysis with XRD and NMR indicates that improved pozzolanic reactivity for coal gangue contributes to the mineral …

Table I (continued) NET CALORIFIC VALUES OF ENERGY PRODUCTS GJ/ton 2019 United Nations Energy Statistics Yearbook xxvii PRODUCTION, EXPORTS AND CHANGES IN STOCKS

Coal gangue with calorific value of 6270 to 12550 kJ/kg can be directly fired in fluidized-bed boilers. Power generation is the most effective way of utilizing coal gangue in China which brings considerable environmental and economical benefits. Not only this may resolve the environmental pollution problems caused by the disposal of gangue, but ...

In conclusion, the introduction of the rapid NIR-XRF coal calorific value analyzer offers a transformative approach to coal quality assessment, promising a cleaner, more efficient, and intelligent means of coal utilization (1). This article was written with the help of artificial intelligence and has been edited to ensure accuracy and clarity.