WEBThe effect of these pollutants can cause the poisoning of drinking water which affects the physical and mental health of living things and cause tremendous damage to the ecosystem. Waste minimization, treatment, and safe disposal are the threeprong approaches to controlling and managing drilling fluid wastes [ 3 ].
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Pulverized Coal Combustion. PCC technology is a widely utilized technology to generate energy from fossil fuel, especially coal [15]. In this technology, pulverized coal is injected to combust in a furnace in the presence of a controlled level of air. The heat generated is used to produce highpressure steam driving a steam turbine to ...
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WEBJun 12, 2022 · Abstract Evaluating the coupling of moisture content with supercritical CO2 (ScCO2) in coal is important for CO2 geological sequestration and enhanced coalbed methane recovery. Changes of minerals and microstructure in bituminous coal after ScCO2water treatment were explored employing Xray powder diffraction and micro .
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WEBJan 1, 2023 · BDO tar is produced from the plant and is difficult to dispose of. This study has used the wastecoalwaterslurry (WCWS) technology to dispose of BDO tar and investigated the acceleration mechanism during cogasifiion. The results show that the weight loss of BDOtarcoalwaterslurry (BCWS) is more evident in the range of .
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WEBDec 30, 2021 · Coal is an abundantly available resource at a rational cost. Thus, coal slurry could be an alternative to petroleum oil as a liquid fuel. Such slurry could be of different types based on the types of liquid as vehicle, viz., CWS, coaloilwater slurry, coaloil slurry, etc. From economics point of view, researchers consider CWS as of great ...
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WEBOct 1, 2005 · Properties of coals are provided in Tables 1 and 2. Characteristics of coallike type of coal, oxygentocarbon ratio, and particle size provide a powerful impact on the rheology of CWS. 38, 39 ...
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WEBFeb 15, 2024 · The compressive strength test sample is consisted of cement, CGS, coal gangue, activators and water, among which the ratio of cement, CGS, coal gangue and water was 1:7:2:, and the ratio of coarse, medium and fine coal gangue was 1:1:3 [21]. The prepared slurry was poured into the cylindrical molds with a size of 50*100 mm, .
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WEBAug 27, 2023 · The interaction between kaolinite and saline water in affecting the microstructure, rheology and settling of coal flotation products. Powder Technol. 2020, 372, 76–83. [Google Scholar] Zhang, N.; Chen, X.; Nicholson, T.; Peng, Y. The effect of saline water on the settling of coal slurry and coal froth. Powder Technol. 2019, 344, 161
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WEBMar 1, 2021 · 1. Introduction. As an important energy source, low rank coal (LRC) would play an increasingly important role in the future social development. Flotation is an effective and widely used method to process the fine coal slimes (< mm), which utilizes the differences in surface physicochemical properties between combustible matter (the .
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WEBMar 1, 2021 · Moreover, Yi et al. [6] used bio oil from biomass pyrolysis to prepare coal water slurry to confirm that the coal water slurry changed from weak to strong pseudoplastic fluid with the increase in the water content of bio oil. Zhang et al. [7] prepared coal water slurry by using waste engine oil and proposed that the possible .
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WEBOct 1, 2012 · The study is devoted to revealing the individual and synergistic effects of modifiions of the carrier medium of the coalwater slurries (CWS) based on coking coal and carboncontaining ...
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WEBCoal fly ash (CFA) is one of the industrial byproducts of burning coal for energy production and has unburned carbon, which negatively affects its full potential use. The flotation technology can be effective in separating unburned carbon from CFA, and the prestirring time is crucial for the ideal initial conditions during the flotation process. To find the .
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WEBOct 10, 2022 · In conclusion, the reduced iron powder is involved in the reaction, and the desulfurization effect of magnetic coal separation is greatly improved. The optimal desulfurization effect can be achieved by thoroughly mixing coal and reduced iron powder with a mass ratio of 5:2 at 600 °C for 1 h after treatment.
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WEBThe generated waste is among the prominent 62 environmental problems. Fortunately, the washery rejects are used in many sectors 63 such as the construction industry, as underground backfill ...
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WEBAug 1, 2023 · First, the preprepared clean coal powder, ironbased alyst, heavy oil agent, and liquid sulfur are combined to create the oilcoal slurry. Under a solvent at elevated temperature and pressure of hydrogen [ 24 ], with the help of an ironbased nanoalyst, the oilcoal slurry and hydrogen are chemically hydrogenated to produce high .
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WEBFeb 1, 2024 · The lowcost raw coal was utilized as a precursor to synthesize series of carbon fiber membranes for efficient oil–water separation. • The carbon fiber membranes were coated with silicone using a vapor deposition technique.
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WEBThe statedependent properties of coal mining wastes (, water retention, hydraulic conductivity, shear strength) are found to be governed by complex factors such as coal content, particle size ...
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WEBJan 1, 2024 · Coal seam water injection is vital in mitigating dust pollution in coal mining operations. To investigate water imbibition and adsorption behavior on the coal surface following injection into coal seams, as well as the impact of surfactants, coal particles with sizes of 6–8 mm, 3–5 mm, and – mm were selected from the Dongtan Coal Mine .
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WEBApr 1, 2011 · Abstract. Slurries of an Oil Mallee biomass char, a low rank coal char and subbituminous coals were prepared by mixing the finely milled solids with water and a range of additives including polyacrylic acid, charged copolymers D101 and D102, and sucrose. The resultant slurries were subjected to rheological characterizations including .
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WEBJul 2, 2022 · A stirring pump was designed at the bottom of the inlet pressure container and can fully mix the coal fine suspension liquid and avoid the coal fine settlement. The stirring pump rotated uniformly during the injection process to make the concentration of coal fine suspension uniform.
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WEBMay 5, 2022 · 1. Introduction. Coal plays an important role in the energy production and chemical fields of China, the world's largest coal producer and consumer. 1 The modern coal chemical industry is an effective way to transform coal from single fuel to diversified utilization of coal. Coal gasifiion is the preprocess of coalderived chemicals, coal .
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WEBOne study used a mixture of 30% by weight bentonite clay and 70% coal dust to remove oil from synthetic oils and oil/water emulsions with efficiencies of up to 98%. Such properties are due to the porosity profile of bentonite, and the fact that it is organophilic(22).
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WEBNov 1, 2019 · The effects of particle size, oil shale content, dust concentration, dispersion pressure and inert dust on the minimum ignition temperature (MIT) of coal and oil shale mixed dust clouds (COSMD) were investigated in a dust cloud MIT testing system to understand the intrinsic mechanisms of these factors affecting the MIT of COSMD.
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WEBSep 16, 2022 · The soil texture changed from silty loam to sandy loam, and the water retention performance improved, affecting the soil saturated water content, capillary water holding capacity, and field water ...
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WEBJul 7, 2011 · Thermogravimetry (TG) and differential thermal analysis were used to investigate combustion behavior with the addition of cornstalk to coal powder and coal tar at three different heating rates: 5, 10, and 15 °C min−1. Different reaction kinetic mechanisms with the classical Arrhenius model were used to treat TG data. The first .
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WEBSep 1, 2021 · The effect of mixing ratio and active alkali and alkaline earth metals (AAEMs) on gaseous products from copyrolysis of coal and corn stalks was investigated in this research.
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WEBSep 15, 2014 · The main objective of this research was to investigate the effect of coal waste powder as filler material in hot mix asphalt. After sampling the coal waste material from a coal washing plant, it was processed to achieve natural coal waste filler. Furthermore, after incinerating the natural coal waste powder at 750 °C, the coal waste .
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WEBMar 20, 2013 · Coal can also increase the level of macronutrients, particularly nitrogen and phosphorus. Most nitrogen in coal is released only upon heating, but Ahrens and Morrisey point out that the issue has not been well studied. A 1996 study of Spanish coals found that "little phosphorus was mobilised by water.".
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WEBFeb 15, 2023 · The natural density and porosity of reef limestone on reefs of Xisha Islands are between and g / cm 3 and to % [8], respectively. Previous research has shown that reef limestone is characterized by high porosity, low density, and low strength, which are greatly different from the terrestrial rocks.
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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