WEBIn the process of coalbed methane extraction, due to the strong hydrophilicity of coal, the surface interaction force between water and the coal matrix is strong. The hydrophobic effect of the coal . Expand
WEBOct 1, 2014 · This post originally appeared on The Guardian's Water hub.. Coal production, from mining to power generation, requires vast volumes of, pollution from coal mining can irreparably harm water resources.. In South Africa—one of the world's most waterstressed countries and one of the largest producers and consumers of .
WEBOct 1, 2012 · The slurry was prepared by mixing coal particles with a gelling solution containing water and 1 wt.% of cobaltintercalated laponite. ... we examined the effects of coal powder gradation, water ...
WEBDec 7, 2018 · Abstract In this study, the use of ceramic and coal waste powders as partial replacement of cement in roller compacted concrete pavement mixture was investigated. The mixtures were produced with the ceramic waste powder contents at 5% and 10% of total cementitious material (by weight). In addition, mixtures containing ceramic and coal .
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 ...
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
WEBFeb 1, 2023 · Viscosity reduction effect of Tween 80 in the waste oilcoalwater slurry was best. ... Mixing it with coal for combustion or gasifiion is an environmentally friendly and efficient way of recycling. ... and Zhu et al. [17] studied the effects of light oil, fine coal powder, and water content as well as the properties of surfactants on the ...
WEBJan 1, 2024 · The slight fluctuations of the differential pressure between the two ends of the hydraulic fracture was mainly caused by the movements of the coal powder particles. When the pulverized coal was transported with the dispersant solutions within the propped fractures, the particles were first influenced by the structures of the pores.
WEBCoalsludge slurry (CSS), which is made by blending sewage sludge with coal, water, and additives, is being identified as a new and effective sludge utilization technology. The main objectives of the present investigation are research on the slurrying, rheology, and stability properties of five CSSs, and determine the influence of sludge type ...
WEBCoal gangue (CG) and coal gasifiion slag (CGS) contain a large amount of siliceous and aluminous minerals and have certain pozzolanic reactivity. In recent years, the use of CG and CGS as SCMs in concrete attracted more researcher's attention. Wang et al. studied the effects of CG with different fineness (200, 325, 500, 1250, and 2000 mesh ...
WEBJan 1, 2020 · As a new type of nozzle, the internal mixing air atomizing nozzle has been widely used in the field of dust reduction via spraying. In this study, the effect of water supply pressure on the atomization characteristics and dustreduction efficiency of the internal mixing air atomizing nozzle was investigated. Firstly, the FLUENT software was .
WEBApr 8, 2021 · The effect of burner tilt was investigated by analyzing the effect on gas flow, temperature distribution, coal particle trajectories and NOx emissions. The results suggest that a downward tilt of the burner (− 15°) has a significant effect on the particle trajectories and the residence time of the particle in the high temperature burner zone.
WEBAug 22, 2022 · 1. Introduction. Coal ganguebased green cemented filling is to mix cement, CGP, coal gangue aggregate and water in mine filling according to a certain proportion, which can not only effectively solve the pollution problem caused by coal gangue discharge, but also improve the comprehensive utilization rate of coal gangue, but also effectively .
WEBFeb 11, 2023 · Fly ash powder affects the environment, but it has a different direct impact on the human body. Figure 5 summarizes the effects of fly ash powder on the environment and the human body. The figure shows that due to rain in the landfill and ash ponds leads to the leaching of various toxic metals such as lead, cadmium, arsenic, mercury, etc., .
WEBJan 1, 2001 · The effects of the mix proportion and curing temperature on the pozzolanic reaction of fly ash in cement paste were investigated by examining the productions of calcium hydroxide and the pozzolanic reaction ratio of fly ash. It is possible to accurately determine the reaction ratio of fly ash in cement paste from the insoluble residue and the .
WEBJun 1, 2017 · The effects of water on preventing mine gas/dust explosion under specific experimental conditions are evident. ... effect. For example, a coal dust load is assumed to be kg per meter length of a 2 m × 6 m mine entry to create dustair mixture at the minimum explosive concentration of 100 g/m 3 if fully suspended in the air. To .
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 .
WEBStirred pulpmixing is performed before coal flotation. In this study, a twostage stirred pulp mixing tank was designed based on the singlestirred process to intensify the mixing effect of pulp and flotation reagents. A tank has a pitchedimpeller openingtype turbine. Stirred pulpmixing and flotation experiments were conducted on a sample of anthracite .
WEBWang et al. used distilled water and a mixed acid solution to treat coal samples and studied the effect of the mixed acid solution on the coal pores. They found that the proportion of micropores in the acidified coal samples significantly decreased, while the number of mesopores, macropores, and microcracks significantly increased.
WEBSep 4, 2018 · In this study, the effects of coal bottom ash and limestone powder as supplementary cementing materials on the setting time of cement are investigated through Vi penetration test in accordance ...
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 .
WEBOct 30, 2018 · Abstract and Figures. The present study was an attempt to investigate the effect of fresh and old coal flotation waste (coal waste), used as asphalt filler and additive, on the properties of hot ...
WEBJan 1, 2020 · Section snippets Materials. Coal slime was collected from Binchang, and the semicoke powder from the Laixi coking plant, both in China. According to the Alfred model of grain size distribution, the semicoke was divided into different size grades (<75 μm, 75–125 μm, and 125–250 μm) through the process of crushing, blending, grinding, and .
WEBJun 1, 2022 · In the methane/ coal dust system, under the influence of water mist, the maximum flame propagation speed and the maximum explosion pressure of the hybrid system decreased by % and % ...
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