A study by Xu et al. (2019) examined the effects of coal waste as filler on the functional characteristics of asphalt mastics and mixtures. The study investigated the effects of coal waste on asphalt mastics and mixtures considering various fractions of mass (20 %, 40 %, 60 %, 80 %) for fine limestone powder replacement as a filler.
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At the Second CoalOil Mixtures Conference, in Danvers, MA, 1979, it was proposed, possibly seriously for the first time, that coaloil slurries should be produced by wet grinding of the coal in oil rather than dry grinding followed by mixing the powder into the oil. Blending powdered coal into fuel oil, typically bunker oil, was, indeed ...
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Abstract. 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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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 DSA100 contact angle ...
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Of the different additives, the viscosity reduction effect of Tween 80 in the waste oilcoalwater slurry was best. 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 of 5%.
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In this study, the combined effect of chemical composition and spreading velocity of collector on flotation performance of oxidized coal was investigated. Oxidized coal samples were prepared using the H 2 O 2 solution oxidation method. The contents of oxygencontaining groups on the coal surface increased with the oxidation degree by Xray photoelectron spectroscopy (XPS) analysis and the coal ...
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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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The pulping steps were as follows [22]: (1) measure out the weights of coal powder, additives, and liquids (deionized water and waste oil) required to make up the slurry; (2) pour the additives and liquids into a stirring tank with a capacity of 200 mL and adjust the speed of the mixer to 400500 r/min to fully dissolve the additives; (3) add ...
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The main purpose in this study was to understand the interactions of coal particles with three amphiphilic humic acidbased polymers, which were designed and synthesized through the copolymerization of humic acid (HA) with maleic anhydridepolyethylene glycol 400 monoester, methacrylatoethyl trimethyl ammonium chloride or both of them, respectively, abbreviated as HAM, HAD and HMD.
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The coal is transferred from the mixing bins to the coal crusher where it is pulverized to a preselected size between and mm ( and in.). ... The pulverized coal is then mixed and blended, and sometimes water and oil are added to control the bulk density of the mixture. The prepared coal mixture is transported to the coal ...
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2) A specific mass of water is poured into a mixing tank, and the speed of the electric mixer (JHS2) is adjusted to 200 r/min, after which additives are added and fully dissolved in the water. 3) The weighed coal powder is added to the mixing tank, and the speed of the mixer is raised to 1000 r/min and kept there for 15 min. 4) The slurry is ...
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Coal waste is a byproduct that produced in coal washing plants. The accumulation of coal waste in the nature causes several ecological and environmental problems. The main objective of this study was to investigate the applicability of coal waste powder and its produced ash as fillers in hot mix asphalt (HMA) compared to the conventional fillers.
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The mixed collector can improve low rank coal flotation efficiency, but its synergistic mechanism needs to be further explored. In this paper, oleic aciddodecane (OAD), oleic acid (OA), and dodecane (D) were employed to treat the low rank coal for revealing new synergistic mechanism of the mixed collector. First the surface free energy of the coal, the surface free energy of coalwater and ...
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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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The percentage of micropores in the pore structure of coal plays a significant role in methane (CH 4) adsorption, whereas the fraction of organic matter in coal has a positive effect on CH 4 adsorption. Ultrasonic waves were used to excite mixtures of organic solvents and coals with different degrees of deterioration.
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The present review paper summarizes the uptodate research advancements made in the use of mixed reagent systems to improve the separation efficiency of coal flotation. Experimental and molecular dynamics simulation approaches have been adopted to enhance floatability, and reagent adsorptions are also discussed.
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The effects of process parameters such as reformer temperature (700850 °C), steam/coal ratio (S/C) () and air equivalence ratio (ER) () on the composition of product gas, lower heating value (LHV), tar content, yield of product gas, the carbon and water conversions and the cold gas efficiency were investigated.
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In industrial process engineering, mixing is a unit operation that involves manipulation of a heterogeneous physical system with the intent to make it more examples include pumping of the water in a swimming pool to homogenize the water temperature, and the stirring of pancake batter to eliminate lumps (deagglomeration).. Mixing is performed to allow heat and/or mass ...
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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 the effects of different process variables on emulsion stability. The emulsion was prepared using 100 ml colloid mill with sorbitan monooleate (SM) as ...
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Adhesion forces for water/oil droplet and bubble on coking coal surfaces with different roughness. ... Surface properties of aged coal and their effects on bubbleparticle attachment during flotation. Adv Powder Technol, 31 (4) ... Effect of microemulsion on lowrank coal flotation by mixing DTAB and diesel oil. Fuel, 260 (2020), p. 116321.
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This invention relates to a mixed fuel comprising a coal powder or the like and heavy oil obtained by adding and mixing a dilute aqueous solution of a watersoluble highmolecular compound and a carbonaceous solid fuel powder such as coal powder or the like (hereinafter referred to as "coal powder and the like") to heavy oil so as to disperse the coal powder and the like and water (in very ...
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INTRODUCTION. Coal water slurry (CWS) is a fuel which consists of fine coal particle suspended in water. Presence of water in CWS reduces harmful emissions and makes the coal explosion proof thus makes it useful as a liquid fuel. The concept of coal water slurry dates back to Smith and Munsell (1879) [1] when patented for coal oil utilization ...
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يرغب أحد موردي المواد من بلجيكا في إنتاج مسحوق الحجر الجيري لملابسه...
الهند غنية بالموارد المعدنية المختلفة وهي سوق مهم لمعالجة المعادن
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