An experimental investigation on the influence of coal brittleness …
Abstract As dust is one of the main hazards generated by coal cutting, understanding the properties of dust generation is essential for preventing and …Web
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Abstract As dust is one of the main hazards generated by coal cutting, understanding the properties of dust generation is essential for preventing and …Web
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To investigate the characteristics of coal dust generation when cut by a roadheader, a system was designed for performing cutting experiments. The aerodynamic diameter distribution of dust was tested by a laser particle size analyzer. Correlations between the coal proximate compositions and the characteristics of dust generation …Web
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To reveal the influence of pore structure of coal on the characteristics of coal dust generation during roadheader cutting, a self-developed coal cutting system was …Web
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The coal transport system of coal-fired power plants is the most serious site of coal dust pollution in power plants. The coal entering the plant until it is sent to the boiler bunker of the plant has to go through several production links, such as unloading, transporting, storing, taking, crushing, and blending.Web
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Airborne dust generation is one of the byproducts of coal mining, processing, and handling. The amount of airborne total dust (ATD, respirable size and larger) and …Web
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The impact crushing dust generation method, which attributes coal dust generation to a single variable, i.e. energy, avoids the interference terms such as the conical pick angle, depth and rotating dust in the cutting process and can well reflect the …Web
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Laboratory crushing experiments were conducted on a range of low- to high-volatile bituminous coals to investigate the various factors influencing airborne respirable dust (ARD) generation. This research was conducted to identify the principles of ARD liberation from the coal product.Web
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The two main uses of coal are for power generation and steel production. In order to yield the highest thermal and financial benefits when shipping direct, the coal is often crushed to 2" x 0 to maximize the haulage capacity of trucks and trains. It is then transported to power plants and steel plants with minimal loss of volume.Web
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Available on demand until November 28, 2024. Learn more REGISTER. View more. Every piece of equipment that transports or processes coal creates some level of particulate matter. Having a strategy ...Web
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The experimental data were statistically analyzed to find the effect of macerals and rank of coal on respirable dust generation. There is a significant effect of rank on …Web
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From the perspective of the physical and chemical properties of dust in mines, the wettability of copper mine blasting dust is mainly controlled by particle size and pore structure (Jin et al. 2021).A molecular dynamics simulation study indicated that larger coal dust particle has higher wettability (Zhang et al. 2021).A novel chemical composite …Web
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However, wetting agent addition alone did not lower the dust generation rate from coal. For a given moisture content, the wetting agent influenced the particle size distribution of dust generated during impact crushing differently between types of coal. For the three coal types investigated, wetting agent addition reduced the concentration of ...Web
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Majority of the mining such as blasting, drilling, crushing, screening, coal washing, dust from mine-waste piles and stock piles, exhaust fumes from equipment and dust from truck movement are sources of air pollution. ... The dust generation is more on a sunny day compared to a cloudy or overcast day. During rainy days, dust generation is …Web
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Zhang et al. found that the airflow velocity distribution, the dust migration trajectory, and the influence of airflow on dust diffusion when cutting coal with downwind differs from those when ...Web
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or crushing process yields total and respirable dust generation rates that increase with coal rank. It is important to note that these results were measurements of dust in the product and not measurements of airborne dust. In the mining and roll crush- ing of coal there is much less regrinding (Organiscak and Page 1998; Ramani et al. 1987).Web
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Air pollution, especially particulate matter has been a cause of detrimental health effects including increased mortality and morbidity (Kim et al., 2015).Coal crushing is done for reducing the size aggregates of coal for transportation after mining is an integral auxiliary system of the coal industry (Zhang and Mao, 2017), but this process attributes …Web
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Dust is the major air pollutant in opencast coal mining areas (CMRI 1998; Vallack and Shillito 1998).Singh has reported haul roads to produce 0.25–0.70 kg of dust per kilometer travel of a dumper.Ghose and Majee reported a total generation of 9.4 t dust per day as a result of whole mining operation in an opencast mine of Jharia Coalfields, of …Web
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Here for the first time, the problems of crushing and dust formation of coals are studied using the Galanov-Grigoriev model. ... Recently, the use of coal-based materials has been reduced due to coal generating environmental pollutants such as fine dust [11,12]. Accordingly, the preparation of AC from new raw materials is necessary.Web
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sequence and delay timing on dust generation during blasting in the surface coal mines. 1.0 INTRODUCTION Dust is produced in all rock-breaking processes and the quantity of potentially airborne dustWeb
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The major aim of this research is to de- velop a fundamental understanding, based on the most up-to-date scientific principles of fracture mechanics, of how fine fragments of coal (respirable dust) are generated during a fracture process. The present knowledge of the basic mechanics of this process is meager at best.Web
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Coal mining and processing involve multiple dust generation processes including coal cutting, transport, crushing and milling etc. Coal dust is one of the main sources of health hazard for the ...Web
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Coal crushing equipment of coal handling plant system in the thermal power plant is very important for Plant efficiency improvement. Keywords: ... large Coal into smaller Coals, gravel, or rock dust. crushers are machines which use a metal surface to break or compress materials. Mining operations use crushers, commonlyWeb
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In the late 1990s, despite years of efforts to understand and reduce coal worker's pneumoconiosis (CWP) prevalence from more than 30% in 1970 to less than 4.2%, the level of occurrence among the US coal miners increased unexpectedly. The recent resurgence of lung diseases has raised concerns in the scientific and regulatory …Web
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Using a Pin Mixer to De-dust Coal. One of the most common methods of dealing with substantial amounts of coal dust is through the use of a pin mixer. Pin mixers provide a quick and cost-effective solution to coal dust, suppressing dust by mixing it with a binder (or simply just water) at high speeds in order to form small granules in a process ...Web
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In coal-handling plants and raw coal sections of coal preparation plants, dust poses a serious problem. The main sources of dust generation are crushers, screens, dedusters and transfer points between handling units. Other sources are storage piles and railway wagons used for loading or transfer.Web
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Mechanical external forces (for example coal cutting by a shearer) lead to the crushing of coal, which causes the covalent bond rupture in the coal molecular structure and the generation of a large number of free radicals. This statement stems from the theory of free radical reaction in CSC (Li, 1996; Li et al., 2016).Web
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@article{osti_269241, title = {Relationships between coal properties and respirable dust generation potential}, author = {Srikanth, R and Zhao, R and Ramani, R V}, abstractNote = {A two-part study was conducted to understand the factors affecting respirable dust generation potential or dustiness of coal seams. In the first part, the …Web
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The Impact of Crusher Type on Fines Generation Fine coal particles create dust problems in material handling and are more costly to clean in the preparation plant, so minimizing the generation of fines in the crushing process can provide tangible benefits to the mining company, explained Kip Alderman, principal, Advanced Coal Technology, Inc ...Web
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determine the inherent respirable dust generation potential (IRDGP) of various coal seams or coal types. Therefore, any new information acquired through such a study could be used in future to investigate the relationship between the exposure levels, dust types and the disease rate among South African coal miners from a long-time perspective.Web
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Airborne dust generation is one of the byproducts of coal mining, processing, and handling. The amount of airborne total dust (ATD, respirable size and larger) and airborne …Web
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A review. As one of the most important energy resources in the world, coal contributes a great deal to the world economy. Coal mining and processing involve multiple dust generation processes including coal cutting, transport, crushing and milling, etc. Coal dust is one of the main sources of health hazard for the coal workers.Web
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Coal is a prime source of energy for India and it will continue to maintain its lead for the foreseeable future. Dust is an accepted fact for almost every operation in coal mining. Many processes can be pinpointed as contributions to dust generation like drilling, blasting, haul roads, coal cutting byWeb
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Homogeneous sample incombustible fractions were used to estimate the mass of coal dust in mixtures with rock dust. The coal dust mass estimation method was applied to airborne dust samples acquired in an underground coal mine downwind of a scrubber. The weighing procedures and coal dust mass estimation methods are described in what follows.Web
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Coal mining and processing involve multiple dust generation processes including coal cutting, transport, crushing and milling etc. Coal dust is one of the main sources of health hazard for the coal workers. Exposure of coal dusts can be prevented through administrative controls and engineering controls. Ineffective control of coal dust …Web
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Coal dust formation and emission is a naturally accompanying process for ones of mining, storage, transportation and transshipment of coals. During all the coals' lifecycle, dust emission endangers the workers' health (Erol et al. 2013; Liu and Liu 2020; Shekarian et al. 2021) as well as the environmental safety (e.g. by air flows-based …Web
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The generation of coal dust around conveyer systems and transfer points is a problem for operators of coal mines, coal plants and similar facilities. Coal dust is a contributor to lung disease and ...Web
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