WEBApr 15, 2024 · 1. Introduction. In the world, the main energy source to support economic development is coal [1].Currently, the country with the largest coal reserves is China, with more than half being in the form of lowrank coal (LRC) [2], producing large quantities of LRC slurry, due to its high moisture, high ash, low calorific value, and other attributes.. .
WEBMay 1, 2000 · The viscosity of coal water slurry at the shear rate of 100 s⁻¹ decreases with an increasing HTD temperature, which is probably due to the decrease of volume of lignite particles caused by the ...
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 .
WEBFeb 1, 2022 · Coaloilwater slurry was prepared by mixing a certain quality of coal powder, water, waste lubriing oil, and additives (sodium lignosulfonate) with a magnetic stirrer. ... formation were accelerated. Considering the fast evaporation of water upon heating, the effect of water on char oxidation may be negligible. Therefore, water can .
WEBFeb 6, 2009 · Fly ash is a fine powder recovered from gases created by the burning of coal. It is the largest component of coal combustion waste, totaling around 70 million tons annually in the United States ...
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.
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.
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. The .
WEBMar 15, 2022 · Water hardness in coal tailings can be characterized approximately with the concentration of multivalent ions, including Ca 2+ and Mg 2+, which are brought to coal tailings through the clean water and leaching from minerals . The results of the research study showed that the mineralogical composition of runofmine coal directly affected the ...
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, .
WEBJun 15, 2022 · In this study, a microemulsion was prepared by mixing dodecyl trimethylammonium bromide (DTAB) and diesel oil; its effect on lowrank coal flotation was studied via water contact angle and wrap ...
WEBSep 10, 2018 · Some collectors are made by mixing the common oily collectors with the surfactants to enhance the flotation of low rank/oxidized coals because the surfactants can improve the dispersion properties of common oil droplets in flotation pulp and the adsorption of oil droplets on the coal particle surface (Çelik, 2004, Chander et al., 1994, .
WEBJan 11, 2021 · Wetting coal is one of the most widely used methods for dust mitigation, including water spraying for airborne dust and water infusion in coal seam 3. Wetting process refers to the process of ...
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.".
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 .
WEBMay 5, 2023 · Also, the oil–water interfacial tension and viscosity of oil droplets decrease as the temperature rises, while the diffusion ability increases. ... The coal sample was added to mix the slurry at 5, 10, 20, 40, and 60 °C for 120 s, and then diesel oil was added to react for 120 s to obtain five products. ... Li C. Effect of compound collector ...
WEBNov 1, 2021 · Mixing 50 mg coal sample and 40 mL deionized water to prepare suspension. The suspension was agitated for 9 min using a magnetic stirrer and the reagents were added following the flotation tests conditions during the process. ... (40 °C). The powder was pressed into coal pieces to measure the water contact angle using the .
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 .
WEBYes, you can mix mica powder with water. Mica powder is a fine, colored mineral powder that is often used in cosmetics and crafts. When mixed with water, the mica particles will suspend in the liquid, creating a shimmering effect. However, the amount of mica powder that you use and the type of water you use can affect the outcome of the mixture ...
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.
WEBSep 5, 2020 · Quartz sand and talc powder are the main materials; white cement, calcium carbonate, and paraffin are glue; silicone oil and iron powder are regulators. The effects of different mixing ratios on the compressive strength, permeability coefficient, and specific gravity were studied using a single factor analysis method.
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
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 ...
WEBDec 12, 2023 · Amir M, Morteza R (2014) Appliion of coal waste powder as filler in hot mix asphalt. J Constr Build Mater 66:476–483. Article Google Scholar Amir M, Morteza R, Pooyan A (2014), Effect of coal waste powder in hot mix asphalt compared to conventional fillers: mix mechanical properties and environmental impacts. J Clean Prod
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 .
WEBApr 1, 2023 · The amount of kerosene adsorbed in the concentrates was analyzed by FTIR measurements. The results showed that oilinwater with g Span 80 had the largest concentrate yield and combustible recovery, while waterinoil had had larger ash content, flotation rate constant, and recovered water.
WEBNov 2, 2021 · The particle sizes of the two types of MDS are smaller than those of the dust and sludge from the common iron and steel metallurgical process. 45 This indies that SFD and WOS are more conducive to mixing with coal and there are more contact points after mixing with pulverized coal, which is beneficial for improving the alytic effect.
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