To accurately verify the effect of coal cuttings on waterbased polymer drilling fluids, we add coal powders to the drilling fluid, and measure their performance after mixing the coal powders. Because the large particles below 60 mesh of coal cuttings mixed in the drilling fluid are removed by the solid control device in field drilling ...
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Consequently combustion equipment has to be derated. An attempt to overcome this has involved emulsifying water with coaloil mixtures (40 wt % coal, 40 wt % oil, 10 wt % water) with the intention of causing disruptive combustion. ... A 50:50 blend (or 1:1 blend) includes 50% of the volume of the powder as fly ash and 50% of the volume of ...
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DOI: / Corpus ID: ; Synergistic effects of mixing waste activated carbon and coal in coslurrying and CO2 cogasification article{Wang2021SynergisticEO, title={Synergistic effects of mixing waste activated carbon and coal in coslurrying and CO2 cogasification}, author={Jianbin Wang and Jian Chen and Jianzhong Liu and He Liu and Mingxia Wang and Jun Cheng ...
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The preparation of stable waterinoil (W/O) emulsion is critical for the success of production of stable coaloilwater slurry. The present study was undertaken to experimentally investigate ...
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noted, coal characteristics affect almost every area of plant performance and operation, it is necessary to predict, as much as possible, the physical and economic challenges that will arise when switching coals. Coal blending in its simplest form is the mixing of available coals to produce a blend which combusts well to produce heat and/or power.
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Results show that the addition of sludge can improve the static stability for slurries prepared by lean coal, coking coal, and lignite. The effect on stability of coking coalwater slurry is the most significant. The proportion of sludge to lean coal added in the slurry can be maintained at 10% to 15%.
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Fu et al. [16] 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 rheology and stability of synthetic fuels. Guo et al. [18] studied the rheological properties of a new type of synthetic fuel composed of residual oil, coal powder, and water.
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Performance of fiber reinforced asphalt concrete under environmental temperature and water effects. Constr. Build. Mater. (2010) T. Xu et al. ... Effect of coal waste powder in hot mix asphalt compared to conventional fillers: mix mechanical properties and environmental impacts. Journal of Cleaner Production, Volume 91, 2015, pp. 262268 ...
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The pitch was pretreated using nitric acid (HNO 3) and a thermal treatment step; this process increased the softening point of the pitch which improves the ing properties [6] and allows better physical mixing of the pitch with the coal powder. We investigated the effect of pitch pretreatment conditions on the final carbon properties by ...
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Coal flotation is a complex process involving several phases (particles, oil droplets and air bubbles). These phases simultaneously interact with each other and with other species such as the molecules of a promoting reagent and dissolved ions in water. The physical and chemical interactions determine the outcome of the flotation process.
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Coal mine paste filling technology can effectively solve the problems caused by coal mining and is a key technology to realize green mining and is widely used in coal mining (Qi et al. 2019; Qian et al. 2018; Qi 2020).In coal mine paste filling technology, the performance of filling materials directly determines the filling effect of a coal mine; and the cemented paste backfill (CPB) setting ...
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1. Introduction. In China, lowrank coal (LRC) is an important part of thermal coal and coal for the coal chemical industry. With the improvement of coal mining and coal preparation mechanization, LRC is prone to produce a large amount of slime in coal mining and processing due to its porous and fragile characteristics [[1], [2], [3]].These finegrained coal slimes have low calorific value and ...
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A coalwater slurry fuel is defined by a number of factors including its viscosity, particle size, rate of sedimentation, ignition temperature (800850 °C [1,4701,560 °F]), combustion temperature (9501,150 °C [1,7402,100 °F]), ash content and calorific value ( kcal/kg ). When coalwater slurry fuel combusts, over ...
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Municipal sludge (MS) is used to prepare coal water slurry (CWS). This practice is beneficial for resource utilization and reduces treatment costs and environmental pollution. In this study, alkalimodified municipal sludge (AMS) was prepared with Ca(OH)2 as modifier and mixed with coal to produce AMSCWS. The effect and mechanism of MS and AMS on slurry ability, stability, and combustion ...
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The effects of several parameters in terms of the fuel category, the heating rate, the coal/coke mass flow ratio, the CO2 partial pressure, and the Ca/S molar ratio on the ignition and burnout ...
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and foods (Table 1). Viscosity has the effect of resisting fluid motion, so the motion created by a mixer impeller in a ... Water 1 Gasoline 8 Kerosene 10 SAE 10 Oil 60 Olive Oil 81 SAE 30 Oil 175 Glucose 500 Caster Oil 1,000 Corn Syrup 1,400 ... selfcorrecting as the powder dissolves, although extended mixing times may be needed. All ...
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void fraction of the coal powder beds is the porosity of particle bed when the voids of coal particle bed are filled with water. Void fraction of CWS was calculated by the following equation (Henterson,, 1978). ε = V. s V. c (2) V. s. where ε, V. c, V. s . referred to as void fraction, volume of coal, and volume of slurry ...
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Further, the comprehensive performance of the waste oilcoalwater slurry, including slurry ability, stability and fluidity, was found to be best at a water content of 10% and a Tween 80 content ...
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1. Introduction. Coal is the world's largest fossil strategic energy reserve, and mining and utilization technologies are constantly innovating. Driven by carbon neutral and carbon emission reduction policies, the clean utilization technology of coal has also achieved continuous breakthroughs [1, 2].Coal gasification is the core process for coal to produce syngas products, and coal ...
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In this paper, the optimal process conditions for coalbiomass copyrolysis were obtained through pyrolysis experiments. The results show that under the condition of the pyrolysis temperature of 500 °C, the pyrolysis oil yield and positive synergistic effect reach the maximum, and the ratio of coal to biomass raw materials is 1:3. The effects of three loading methods (coal loading on ...
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Abstract. The preparation of coal water slurry (CWS) as a new substitute for oil and the factors affecting the stability of CWS were studied in this paper. Dry method was used to prepare CWS. Dry coal water slurry refers to the preparation of CWS by grinding coal into powder, then adding water and additives, mixing and stirring.
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