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, …
DOI: 10.1016/j.jobe.2022.104821 Corpus ID: 249733070; Performance of cement-based materials containing calcined coal gangue with different calcination regimes @article{Guo2022PerformanceOC, title={Performance of cement-based materials containing calcined coal gangue with different calcination regimes}, author={Zhaoheng …
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 …
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 ...
There are also studies using the RF method to predict the calorific value. These studies focused on the calorific value prediction of producer gas from biomass gasification [1], pyrolytic bio-oil from fast pyrolysis of biomass [4], municipal solid waste [13], biomass-biochar-hard coal [24], torrefied biomass [25], coal [26].
A new disposal process for coal gangue with different properties is developed. • The system is self-sustaining by burning pyrolytic oil, gas and partial char. • The system is more economical to treat ultra-low calorific value coal gangue. • The recommended pyrolysis temperature is about 600 ℃ for industry process. •
Here are approximate calorific values for some common fuels: Coal: The calorific value of coal varies depending on its type and grade. Bituminous coal, for example, has a higher calorific value than sub-bituminous or lignite coal. It can range from about 24 to 35 megajoules per kilogram (MJ/kg).
Zhang, H. et al. Preheating pyrolysis-char combustion characteristics and kinetic analysis of ultra-low calorific value coal gangue: Thermogravimetric study. Appl. …
Corresponding to Scenario 1, the input of coal and coal gangue in Scenario 6 has a total calorific value of 10,030 MJ, contributing to 98.8% of the total energy. In …
Generally, gangue with a calorific value higher than 1200 kcal is used to generate electricity by blending it with a certain proportion of medium-calorific value fuel (coal slime or middling) . The main feature of CFB boilers is the multiple cycles of fuel, repeated low-temperature combustion, and long combustion time, which is very suitable ...
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 …
Low calorific value coals (LCVCs) are some industrial by-product of coal mining and coal preparation in China, which include coal gangue, coal slime as well as parts of middlings. Large quantities of LCVCs are produced each year, which cause some environmental effect on the air [ 1 ], soil [ 2 ] and water [ 3 ] near the LCVCs dumps.
It is estimated that the calorific value of coal gangue is 30% of the source coal. Owing to containing combustible matter in coal gangue and increasing demand for electricity, coal gangue is widely used in low-calorific value coal-fired power plant [4], [6], [7]. The chief advantage of coal gangue is wide-spread availability at little or no ...
As one of the most important indicators of coal, calorific value (CV) not only determines the value of coal product, but also has a significant impact on the further processing and utilization of coal. Traditional methods of obtaining prediction data suffer from a range of problems such as too many input variables, low prediction accuracy of a ...
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 …
DOI: 10.1016/j.conbuildmat.2024.135061 Corpus ID: 267182312; Study on the calorific value and cementitious properties of coal gangue with 0-1 mm particle size @article{Ke2024StudyOT, title={Study on the calorific value and cementitious properties of coal gangue with 0-1 mm particle size}, author={Guoju Ke and Haishun Jiang and …
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
Coal gangue is a mixture of a variety of rock and mineral composition with low carbon content. Normally, its calorific value increases with the increase of carbon mass …
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. Based on analysis of TG data, it is determined that the best model describing stage 1, stage 2 and stage 3 of coal gangue pyrolysis process is D3 ...
Energy content or calorific value is the same as the heat of combustion, and can be calculated from thermodynamical values, or measured in a suitable apparatus:. A known amount of the fuel is burned at constant pressure and under standard conditions (0°C and 1 bar) and the heat released is captured in a known mass of water in a calorimeter. If the …
In this paper, two kinds of coal gangue were selected for thermogravimetric experiments, including Xiaonan coal gangue (XN-CG) with ultra-low calorific value, …
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 …
A new disposal process for coal gangue with different properties is developed. The system is self-sustaining by burning pyrolytic oil, gas and partial char. The system is more economical to treat ultra-low calorific value coal gangue. The recommended pyrolysis temperature is about 600 ℃ for industry process. The recommended excess air …
Biomass and agricultural residues for energy generation. Eija Alakangas, in Fuel Flexible Energy Generation, 2016. 3.3.3.2 Calorific value. The net calorific value of solid fuels for dry matter is determined in accordance with standards ISO 1928 and EN 14918/ISO 18125 (for solid biofuels).. Gross calorific value is the absolute value of the specific energy of …
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
Abstract Coal gangue was the rock associated with coal mining. The combustion efficiency of coal gangue in thermal power plants was limited by its low calorific value and incombustibility. In this paper, coal gangue was made into particles of about 2–10 mm, and its isothermal pyrolysis characteristics under the N2 atmosphere …
Quantitative analysis of the whole rock minerals of coal gangue was conducted using a Nippon Nikkei ultima 4 X-ray diffractometer, and the test results are shown in Fig. 3.According to the ...
The adulteration of gangue will not only reduce the quality of coal, but also due to the low calorific value of gangue, mixed with coal will reduce the efficiency of coal combustion will also cause environmental pollution, so the gangue from the coal is very necessary to separate the processing process.
A systematic study of coal gangue as C30 concrete admixture were carried out. ... The calorific value of floats was 17.58 MJ/kg (5 min) and 11.18 MJ/kg (20 min), which could be used as coal products. It was found that the compressive and flexural strength of 5 min mechanical activation-water washing cementitious materials reached …
Coal gangue has the shortcomings of low calorific value and refractory burnout, while polyvinyl chloride has the advantages of a long combustion process and …
The gross calorific value (GCV) is an important property defining the efficiency of coal. There exist a number of correlations for estimating the GCV of a coal sample based upon its proximate and ultimate analyses. These correlations are mainly linear in character...
The results indicate that compared to 1–16 mm coal gangue, the calorific value of 0–1 mm coal gangue significantly increased. After calcination, the larger particles of 0–1 mm coal gangue ...
