The effects of grinding method, grinding time, grinding concentration, and pH on the desulfurization of high-sulfur coal were studied. After being treated, the coal sample was filtered, dried, and ...
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— Energy Sources, Part A: Recovery, Utilization, and Environmental Effects ISSN: (Print) ( The effect of wet-grinding on coal mechanochemical pre-desulfurization View supplementary material The ...
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— The HGI varies with coal rank, increasing (greater ease of grinding) with increasing rank through the high-volatile bituminous rank range; and the HGI varies with …
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— In this article, effects of moisture content and coal mixtures on grinding properties of the samples of two different fine coals, which were used in the Göltaş …
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— In this article, effects of moisture content and coal mixtures on grinding properties of the samples of two different fine coals, which were used in the Göltaş Cement Factory in Isparta...
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— The Hardgrove Grindibility Index (HGI) of coal is an indicator of its grindibility characteristics to determine the energy required for its pulverization. The present study is aimed at investigating the effect of inherent moisture and the blending behavior on HGIs of indigenous coals. Experiments were carried out using the standard Hardgrove …
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— This study aims to investigate the effects of the salt type and concentration of coal seam water, the solubility of CO2 in water, and the injected gas composition on the wettability of a highly ...
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— Such an index termed as Statistical Grindability Index (SGI), may be found useful in assessment of coal behaviour not only in crushing and grinding of coal but also …
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— Investigations into the effects of moisture and coal blending on the Hardgrove grindability index were carried out on Collie coal from Western Australia . A new method of estimation of the Hardgrove …
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— DOI: 10.1016/S0378-3820(03)00044-4 Corpus ID: 96384832; Effects of moisture and coal blending on Hardgrove Grindability Index of Western Australian coal @article{Vuthaluru2003EffectsOM, title={Effects of moisture and coal blending on Hardgrove Grindability Index of Western Australian coal}, author={Hari B. Vuthaluru and …
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— However, the effect of microwave treatment on grinding coal samples −3.35mm in size which can be considered to be fine is still under investigation. The purpose of this paper is to make ...
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— The energy consumption of grinding is the subject of many studies, especially in the case of ball mills for grinding clinkers [8,9], fuels [10], iron ore [11], hematite ore [12], sulfide ore [13 ...
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— The Hardgrove Grindibility Index (HGI) of coal is an indicator of its grindibility characteristics to determine the energy required for its pulverization. The present study …
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— Accurately characterizing the pore structure of tectonically deformed coal (TDC) is an essential prerequisite for investigating the porosity change rules of coal during coal deformation. This paper aims to discuss the possibility of conducting gas adsorption on original coal chunks of TDCs instead of ground coal particles and to investigate the …
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— The effect of moisture on Shengli lignite breakage behavior and energy efficiency was studied experimentally using a standard Hardgrove mill fitted with a wattmeter. The grinding process concerned both the inputs, namely the occurrence and content of water and instantaneous energy consumption and the outputs, size-reduction …
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— Anthracite, a valuable and scarce coal, typically requires systematic liberation for deep deashing, wherein the particle size reduces to the micron level upon ultrafine grinding.Changes in the physicochemical properties of anthracite particles induced by ultrafine grinding significantly impact subsequent flotation. Accordingly, in this study, a …
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— The analysis of experimental results found that the grinding capacity has a negative correlation with the ash content in coal. Moisture content in analysis sample of coal has a positive ...
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— The maceral composition of the individual microlithotypes further influences the behavior of coal in grinding (Hansen and Hower, 2014). Attempts have been made to investigate the effects of different parameters such as elemental analysis, mineral matter, and moisture on HGI.
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— The utilization of coal in the form of coal water slurry is a better and efficient method to control the harmful pollutants viz. NOx and SOx. Coal water slurry is a complex, high energy density, multiphase fuel. The rheological characteristics of the coal water slurry are quite comparable to those of the heavy oil.
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moisture inherent in mined coal is called. high moisture coal grinding Crusher ... Ash and Inherent Moisture content of a sample of coal. ... effect of inherent moisture in coal during firing SBM Mining.
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The coal samples to be used for making the coal blends are crushed to a fineness of 90% below 3.2 mm. Water was added to the coal blend to obtain the desired value of moisture content. The coal cake was made inside a cardboard box keeping the bulk density 1150 kg/m 3. The final coal cake thus made is charged into the test oven. Before charging ...
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— The effect of a novel grinding on coal maceral separation is studied in this work. The alternate method is based on grinding of coals by shearing compared to impact crushing as in other ...
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— In this article, effects of moisture content and coal mixtures on grinding properties of the samples of two different fine coals, which were used in the Göltaş …
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— The influence of microwave pretreatment on the heating response, moisture content, surface morphology, grindability, and liberation of coal were investigated. The results show that microwave irradiation has a weak effect on the chemical composition, but can reduce moisture content significantly.
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— Comminution (crushing and grinding or pulverizing), as an essential step in coal treatment, is often the greatest energy consumer in coal washing plants (Sengupta, 2002).
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— With an increase in the grinding time, the G-G-S function is the optimal function for characterizing the particle size probability mass distributions of wet grinding, …
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Many studies analyze the effect on coal grindability based on proximate and ultimate analysis of coal, as well as petrography. [12-16] As the moisture content of coal is one of …
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— The mechanical properties and degradation caused by damage within coal pillar dams determine the safety and stability of underground water reservoirs. This study investigated the influence of moisture content on the mechanical properties and failure behaviors of coal samples by conducting a series of non-destructive water immersion, …
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— A coal, hydrophilic in nature, could increase in moisture at appropriate conditions of temperature and humidity. The ASTM warns that variations in moisture may alter the grindability characteristics and could result in different indices.
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— However, the desulfurization rate was almost zero by dry-grinding. The specific surface area of coal samples and its contents of FeSO 4, and Fe 2 (SO 4) 3 changed from 3.570 m 2 ·g −1, 0.159%, and 0.593% of raw coal to 4.879 m 2 ·g −1, 0.611%, and 0.939% of the dry-grinding sample and 13.866 m 2 ·g −1, 0.939%
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— This study investigated ultra-fine coal grinding performance of four low- to moderate-cost grinding media in a laboratory stirred mill. Kinetic grinding tests showed that silica beads generated the finest product size with a P 80 of 5.9 μm from a feed size of 24.4 μm while having a specific energy (SE) input of 309 kWh/ton. Nonetheless, the least …
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Hardgrove Grindability Index (HGI) is a determining factor of energy consumption during grinding. The current study is aimed at investigating the influence of the blending behavior on HGIs of two dissimilar coal samples. In this study, one local coal sample is taken from Lakhra coal deposits and second sample is extracted from Indonesian coal reserves for …
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The grinding conditions in the preparation of coal-water slurries were improved by the use of the dispersing agents PSS and NSF and viscosity values much less than 1000 mPa were obtained. Under the optimum concentrations (0.3 and 0.7% to mass of coal) attainable in the presence of PSS and NSF, it was observed that the conservation of energy ...
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— Effect of grinding time on coal particle shape, roughness and floatability was studied. ... The moisture content of coal was determined by following the procedure defined in ASTM D3302-15 [36] with a laboratory type oven (Memmert UF450). While the ash content and volatile matter values were determined by following the procedures defined …
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— This work examines the effect of mechanical grinding on PA in the presence of water, referred to here as chemi-mechanical grinding. ... As ASTM C618 requires a fineness of < 34%, milling in the presence of water negatively effects a coal ashes ability to pass ASTM requirements and may requires additional grinding time or sieving to be …
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PDF | On Dec 1, 2015, M. Siddhartha Bhatt published Effect of moisture in coal on station heat rate and fuel cost of Indian thermal power plants | Find, read and cite all the research you need on ...
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