Distribution of fluorine in the surface dust of Wuda coal base, Inner Mongolia of Northern China. Journal of Geochemical Exploration, 2018, 188, 390-397. 3.2 15 18 Improving strength of calcinated coal gangue geopolymer mortars via increasing calcium content. Construction and Building Materials, 2018, 166, 760-768. 7.2 126 19
Medium and high sulfur coal gangue (MHSCG) presents challenges for safe application on civil engineering building materials due to the high content of unstable pyrite, of which the acidic oxidation products are against alkali cementitious materials.
1. Introduction. The coal gangue accounts for about 10–20% of coal production, and it is one of the largest industrial solid wastes emitted in China [1,2].It occupies land and pollutes the atmosphere and water [3,4], so carrying out comprehensive utilization of coal gangue is one of the important ways to solve these problems.The …
Coal is one of the main energy sources in many countries, and coal gangue (CG) is a kind of gray-black rock produced in the process of coal processing and washing, with low carbon content and harder than coal, generally accounting for 15%–20% of coal production in China and 25% of industrial waste emissions.
For this purpose, we determine and calculate the average sulfur, arsenic, mercury and fluorine contents of Chinese coal gangue, based on weighted coal reserves …
In the process of excavation and utilization of the coal gangue hill, gangue at different weathering degree was exposed to the environment, which can be harmful to the surroundings. In order to find the law of heavy metal release and to evaluate the potential ecological risk, five kinds of coal gangue at different weathering degrees were collected …
content in low-sulfur coal gangue is associated with greater, leaching of heavy metals; acidic conditions promote the release of heavy metals in low-sulfur coal gangue; and more precipitation is ...
The content of sulfur, arsenic, mercury, and fluoride in coal gangue samples (including roof, parting, floor, and mixed coal gangue) in this study is listed in Table 1. Some studies have reported the contents of these elements in Chinese coal gangue …
1. Introduction. Coal gangue (HS-CG) is the dark-gray rock produced during coal mining and washing process, and its production is about 10%–15% of coal mining, which depends on the geology and mining conditions (Zhu et al., 2020; Bai et al., 2022).Due to the utilization of coal resources in the world lead to the accumulation of HS-CG also …
To study the amount of fluorine emission from the combustion of the steam coal (mainly Permo-Carboniferous coal) from the North China Plate and Northwest …
The carbon content of coal gangue, as a type of carbon-containing solid waste, varies greatly ... and tendency of coal gangue and found that the internal threshold conditions for the spontaneous combustion tendency of coal gangue backfill is a total sulfur content of greater than 1.0% and calorific value greater than 4.18 MJ kg −1.
Coal gangue power generation Coal gangue grinding adopts fluidized bed technology. When the carbon content is greater than 20%, it can be used as energy and can be used to generate electricity. Recycling of coal and pyrite Coal gangue adopts composite dry coal preparation, cyclone, and heavy medium separation. When the coal …
Both coal and coal gangue contain sulfur and nitrogen, which result in sulfur dioxide (SO 2) and nitric oxides (NO x) emissions [16, 17]. The emission behavior of the blends of coal gangue and coal has not been reported. Sulfur in coal and coal gangue can exist in both organic and inorganic forms [18, 19]. Compared with coal, the …
1. Introduction. Coal gangue is a type of solid waste produced in the coal mining and washing processes. The global coal mining industry produces approximately 350 million tons of inactive gangue each year, and the accumulated coal gangue in China alone amounts to 6.0 billion tons [1], [2], [3].In Spain, about 2 million tons of coal mine …
1. Introduction. Coal gangue is a solid waste generated during coal mining and washing, accounting for 15–30% of raw coal production (Li and Wang, 2019).Coal gangue with a sulfur content of more than 2% is referred to as high-sulfur gangue (Wang et al., 2023a, Wang et al., 2023b).High-sulfur gangue is highly polluting because of its …
Although the content is very little, fluorine is a common chemical element in coal or clay minerals. Hence, the research on the emission of fluorine for coal and clay …
DOI: 10.1021/acs.est.1c00150 Corpus ID: 233027359; Ambient PM2.5 and Related Health Impacts of Spontaneous Combustion of Coal and Coal Gangue. @article{Guo2021AmbientPA, title={Ambient PM2.5 and Related Health Impacts of Spontaneous Combustion of Coal and Coal Gangue.}, author={Wenkai Guo and Bing …
1. Introduction. As a significant energy source in the world, coal accounting for more than 27% of the primary energy structure [1], [2], and is widely employed in daily production and life.Gangue is a low-carbon solid waste produced during coal mining and washing, accounting for about 10%−15% of the total coal output [3].The cumulative …
Results show that the average sulfur content in the Binxian coal gangue was 2.40 %, raw coal 2.85 % and the coal slime was 0.92 %. ... the emissions of sulfur, arsenic, fluorine and mercury from ...
A rough estimate of the annual amount of sulfur, arsenic, mercury and fluoride emission from spontaneous combustion of coal gangue in China was determined. The weighted …
1. Information. With the increasing depletion of natural resources, many researchers are committed to the development and utilization of CG as a "new resource", for raw materials and products [1], [2].In addition its high iron and sulfur contents, the potential environmental hazards of CG include compounds containing heavy metals, …
DOI: 10.2139/ssrn.4084354 Corpus ID: 248223656; The Thermal Transformation Behavior and Products of Pyrite During Coal Gangue Combustion @article{Liu2022TheTT, title={The Thermal Transformation Behavior and Products of Pyrite During Coal Gangue Combustion}, author={Lihui Liu and Qinfu Liu and Shuai Zhang and Yakui Li and …
A certain amount of research has been conducted on the geochemical characteristics of heavy metals in coal gangue at home and abroad. Jinkai Zhang et al. found that under dynamic leaching conditions, the leaching characteristics of heavy metals in coal gangue are related to the content and occurrence of elements in the gangue, …
22 Such a large quantity of coal gangue pile causes a severe social, environmental, and economic problems. 23 Although coal gangue is used as the traditional construction materials to a certain ...
The sulfur content of coal gangue is within 1–3%, which is classified as medium-high sulfur coal. Its output accounts for about 10–20% of the raw coal output [ 3 ]. 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 ...
1. Introduction. In China, coal economy, as a supportive industry, has an irreplaceable role in economic development, production and living. However, in the coal mining production process, coal gangue accounts for 15–20 % of the raw coal but cannot be used like coal due to its low calorific value and low combustion efficiency …
Sulfur gases in coal gangue are measured by qualitative and quantitative analysis. ... The remaining three types of organic sulfur exhibit considerably lower content and range from one hundred to one thousand times less than that of SO 2 or H 2 S. ... Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous …
Coal gangue is one of China's main industrial solid wastes, which contains various harmful heavy metal elements, such as lead (Pb). The long-term accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion, eventually endangering human life and health with its continuous …
In 2014, China's raw coal production stood at ∼3.87 billion tons, with the coal-washing rate at 60.5% of the total (Li, 2014, (NBSC), 2015). According to Equation (1), about 2.34 billion tons of raw coal was washed in China, in 2014. Among all the coal cleaning products, the output of cleaned coal, CWBs, and coal gangue were
Coal gangue is one of the largest mine solid wastes in China, and its discharge and stockpiling have caused resource waste, environmental pollution and other problems. Starting from the resource characteristics of coal gangue, this paper systematically discusses the ways and research status of coal gangue resource …
The results suggested that coal gangue significantly influences soil S, pH and plant species after 8 years of natural recovery. The CK-far plots contained relatively …
DOI: 10.1016/J.ATMOSENV.2016.12.001 Corpus ID: 99833867; Sulfur, arsenic, fluorine and mercury emissions resulting from coal-washing byproducts: A critical component of China's emission inventory
